Spray head assembly, water distribution device and cooling tower

Abstract

The invention provides a nozzle assembly, a water distribution device and a cooling tower. The nozzle assembly comprises a communicating pipe, and a variable flow groove is formed in the side wall of the communicating pipe; the casing pipe is movably arranged on the communicating pipe, and the effective water inlet area of the variable flow groove can be adjusted through movement of the casing pipe; the communicating pipe is arranged in the water distribution disc, and buoyancy of fluid in the water distribution disc can drive the sleeve to move. According to the spray head assembly, the water distribution device and the cooling tower, buoyancy of liquid in the water distribution disc is used for driving the sleeve to move, so that the sleeve can dynamically adjust the effective water inlet area of the variable flow groove according to the liquid level height in the water distribution disc, and the effective water inlet area is in direct proportion to the liquid level height in the water distribution disc; the water inlet pressure entering the communicating pipe is basically unchanged, the water inlet flow speed of the communicating pipe can be basically unchanged, the spraying range of the nozzle is further guaranteed, the spraying effect of the nozzle assembly is guaranteed, and the heat exchange efficiency of the cooling tower is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of liquid spraying, in particular to a spray head assembly, a water distribution device and a cooling tower. Background Art

[0002] Cooling towers are commonly used equipment in the industrial field. In the refrigeration and air-conditioning industry, cooling water is evenly sprayed on the filler using a nozzle, so that the high-temperature cooling water from the condenser flows into the cooling tower and comes into direct contact with the ambient air, transferring heat to the air. The contact between water and air is used to reduce the temperature of the high-temperature cooling water through evaporation.

[0003] However, in the cooling tower in the prior art, frequency conversion technology is used to control the rotation speed of the cooling water pump, and the change in the rotation speed of the cooling water pump will cause the water outlet flow rate of the cooling tower to change, causing the water level in the water distribution pan of the cooling tower to change, and the nozzles arranged on the water distribution pan need to rely on the water level in the water distribution pan to generate water pressure for spraying. When the water level in the water distribution pan decreases, the spraying range of the nozzles will decrease, resulting in uneven water distribution of the nozzles, which seriously affects the heat exchange efficiency of the cooling tower. Summary of the invention

[0004] In order to solve the technical problem in the prior art that flow changes will affect the uniformity of water distribution of the nozzle and thus affect the heat exchange efficiency of the cooling tower, a nozzle assembly, a water distribution device and a cooling tower are provided which utilize the buoyancy of the liquid in the water distribution tray to drive the movement of the sleeve to adjust the effective water inlet area of ​​the variable flow groove on the side wall of the connecting pipe, thereby ensuring the water inlet pressure entering the nozzle to ensure uniform water distribution.

[0005] A nozzle assembly, comprising:

[0006] A connecting pipe, wherein a flow-changing groove is provided on a side wall of the connecting pipe;

[0007] A sleeve, the sleeve being movably disposed on the connecting pipe, and the sleeve being capable of adjusting the effective water inlet area of ​​the variable flow slot by moving;

[0008] The connecting pipe is arranged in the water distribution tray, and the buoyancy of the fluid in the water distribution tray can drive the sleeve to move.

[0009] The variable flow groove is distributed on the side wall of the connecting pipe in a spiral shape with the central axis of the connecting pipe as the axis; and / or, along the length direction of the variable flow groove, the width of the variable flow groove remains unchanged.

[0010] A water inlet is also provided on the side wall of the connecting pipe, and the distance from the water inlet to the bottom surface of the water distribution tray is greater than the maximum distance from the variable flow slot to the bottom surface of the water distribution tray.

[0011] A buoyancy chamber is formed on the sleeve, and a vent is provided at the lower end of the sleeve.

[0012] The connecting pipe is provided with a first guide structure, and the sleeve is provided with a second guide structure, and the first guide structure and the second guide structure are guided and matched.

[0013] A cover body is provided at the upper end of the sleeve, a first mounting structure is provided at the upper end of the connecting pipe, a guide hole is provided on the first mounting structure, the guide hole constitutes the first guide structure, a guide rod is provided on the cover body, the guide rod constitutes the second guide structure, and the guide rod is movably provided in the guide hole.

[0014] The cover body is provided with a water permeable hole, the first mounting structure is provided with an escape area, and the water permeable hole is communicated with the interior of the connecting pipe through the escape area.

[0015] The central axis of the guide rod and the central axis of the guide hole are both collinear with the central axis of the connecting pipe.

[0016] The sleeve is provided with a first limiting structure, and the connecting pipe is provided with a second limiting structure. The first limiting structure and the second limiting structure cooperate to limit the moving distance of the sleeve.

[0017] The nozzle assembly also includes a water distribution structure. The connecting pipe is provided with a water outlet. The water distribution structure is rotatably arranged at the water outlet.

[0018] The water distribution structure includes a turntable, which is rotatably arranged at the water outlet. A drainage channel is formed on the turntable, and the profile of the drainage channel is a curve; or, the outflow direction of the drainage channel and the inflow direction of the drainage channel have an angle.

[0019] The drainage channel has a first end close to the central axis of the turntable, and a first water distribution channel is provided on a portion of the turntable between the first end and the central axis of the turntable.

[0020] Along the direction from the top surface of the turntable to the bottom surface of the turntable, the distance between the first water distribution channel and the central axis of the turntable gradually increases.

[0021] The number of the drainage channels is at least two, and all the drainage channels are distributed in a ring shape with the central axis of the rotating disk as the axis.

[0022] There is a first distance between the first ends of two adjacent drainage channels, and a second water distribution channel is provided on the portion of the rotating disk corresponding to the first distance.

[0023] Along the direction from the top surface of the turntable to the bottom surface of the turntable, the distance between the second water distribution channel and the central axis of the turntable gradually increases.

[0024] Two adjacent drainage channels have a second spacing at the edge of the turntable, and the thickness of the turntable corresponding to the second spacing is smaller than the thickness at the central axis of the turntable.

[0025] The first end of the drainage channel is located outside the projection area of ​​the connecting pipe on the rotating disk.

[0026] The water distribution structure further includes a drainage member, which is disposed on the rotating disk and has the drainage channel formed on the drainage member.

[0027] An end of the guide member away from the central axis of the turntable protrudes from the edge of the turntable.

[0028] The water distribution structure further comprises a rotating shaft, which is arranged on the rotating disk, and an upper end of the rotating shaft is rotatably arranged on the connecting pipe or the water distribution disk.

[0029] The rotation axis of the rotating shaft is colinear with the central axis of the connecting pipe.

[0030] A water distribution device comprises the above-mentioned nozzle assembly.

[0031] A cooling tower comprises the above-mentioned nozzle assembly or the above-mentioned water distribution device.

[0032] The nozzle assembly, water distribution device and cooling tower provided by the present invention utilize the buoyancy of the liquid in the water distribution tray to drive the sleeve to move, so that the sleeve can dynamically adjust the effective water inlet area of ​​the variable flow slot according to the liquid level height in the water distribution tray, so that the effective water inlet area is proportional to the liquid level height in the water distribution tray, thereby ensuring that the water inlet pressure entering the connecting pipe remains basically unchanged, and the water inlet flow rate of the connecting pipe can also remain basically unchanged, thereby ensuring the spraying range of the nozzle, ensuring the spraying effect of the nozzle assembly, and the heat exchange efficiency of the cooling tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of the structure of a nozzle assembly provided by an embodiment of the present invention;

[0034] Figure 2 A side view of a nozzle assembly provided by an embodiment of the present invention;

[0035] Figure 3 A cross-sectional view of a nozzle assembly provided by an embodiment of the present invention;

[0036] Figure 4 A three-dimensional diagram of a connecting pipe of a nozzle assembly provided in an embodiment of the present invention;

[0037] Figure 5 A side view of a connecting pipe of a nozzle assembly provided in an embodiment of the present invention;

[0038] Figure 6 A cross-sectional view of a connecting pipe of a nozzle assembly provided in an embodiment of the present invention;

[0039] Figure 7 A top view of a connecting pipe of a nozzle assembly provided in an embodiment of the present invention;

[0040] Figure 8 A schematic structural diagram of a sleeve, a cover body and a guide rod of a nozzle assembly provided in an embodiment of the present invention;

[0041] Fig. 9 A cross-sectional view of a sleeve, a cover body and a guide rod of a nozzle assembly provided in an embodiment of the present invention;

[0042] Fig.10 A three-dimensional diagram of a water distribution structure of a nozzle assembly provided in an embodiment of the present invention;

[0043] Fig.11 A top view of the water distribution structure of the nozzle assembly provided in an embodiment of the present invention;

[0044] Fig.12 A cross-sectional view of a water distribution structure of a nozzle assembly provided in an embodiment of the present invention;

[0045] Fig.13 Another cross-sectional view of the water distribution structure of the spray head assembly provided by an embodiment of the present invention;

[0046] Fig.14 A side view of the water distribution structure of the spray head assembly provided in an embodiment of the present invention;

[0047] Fig.15 A schematic diagram of the structure of a nozzle assembly provided in an embodiment of the present invention applied to a water distribution tray;

[0048] In the figure:

[0049] 1. Connecting pipe; 11. Variable flow slot; 2. Sleeve; 3. Water distribution tray; 12. Water inlet; 21. Buoyancy chamber; 22. Air vent; 13. First mounting structure; 23. Cover body; 24. Guide rod; 25. First limiting structure; 4. Water distribution structure; 14. Water outlet; 41. Turntable; 42. Drainage channel; 43. First water distribution channel; 44. Second water distribution channel; 45. Drainage member; 46. Rotating shaft. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0051] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0052] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0053] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0054] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the cooling tower in the prior art, frequency conversion technology is used to control the speed of the cooling water pump. The change in the speed of the cooling water pump will cause the water flow rate of the cooling tower to change, so that the water level in the water distribution pan of the cooling tower changes. The nozzles arranged on the water distribution pan need to rely on the water level in the water distribution pan to generate water pressure for spraying. When the water level in the water distribution pan decreases, the spraying range of the nozzles will decrease, resulting in uneven water distribution of the nozzles, which seriously affects the heat exchange efficiency of the cooling tower. To this end, the present application provides a method such as Figures 1 to 15The nozzle assembly shown comprises: a connecting pipe 1, on the side wall of which a variable flow slot 11 is arranged; a sleeve 2, which is movably arranged on the connecting pipe 1, and can adjust the effective water inlet area of ​​the variable flow slot 11 by moving; the connecting pipe 1 is arranged in a water distribution tray 3, and the buoyancy of the fluid in the water distribution tray 3 can drive the sleeve 2 to move. The sleeve 2 is driven to move by the buoyancy of the liquid in the water distribution tray 3, so that the sleeve 2 can dynamically adjust the effective water inlet area of ​​the variable flow slot 11 according to the liquid level height in the water distribution tray 3, so that the effective water inlet area is proportional to the liquid level height in the water distribution tray 3, so as to ensure that the water inlet pressure entering the connecting pipe 1 is basically unchanged, and the water inlet flow rate of the connecting pipe 1 can also be basically unchanged, thereby ensuring the spraying range of the nozzle, the spraying effect of the nozzle assembly, and the heat exchange efficiency of the cooling tower. When using the nozzle assembly, when there is no water in the water distribution tray 3 or water contacts the sleeve 2 but cannot make the sleeve 2 float, the sleeve 2 completely blocks the variable flow slot 11. At this time, water cannot enter the connecting pipe 1, that is, the nozzle assembly will not spray at this time. As the water pump pumps water into the water distribution tray 3, the liquid level gradually rises and can drive the sleeve 2 to move through buoyancy. The sleeve 2 gradually opens the variable flow slot 11 as it moves. The part of the variable flow slot 11 opened by the sleeve 2 constitutes the effective water inlet area of ​​the variable flow slot 11. The interior of the connecting pipe 1 can be connected with the interior of the water distribution tray 3 through the part of the variable flow slot 11 that is not covered by the sleeve 2. The water outlet on the connecting pipe 1 can spray. When the water supply flow rate of the water pump changes, the liquid level in the water distribution tray 3 will also change accordingly. The sleeve 2 can move synchronously to adjust the effective water inlet area of ​​the variable flow slot 11, thereby ensuring that the water inlet flow rate of the connecting pipe 1 remains basically unchanged, thereby achieving the purpose of keeping the spraying effect of the nozzle assembly basically unchanged. Taking the reduction of the water supply flow rate of the water pump as an example, since the nozzle assembly is in the spraying process, the water level in the water distribution tray 3 gradually decreases, the water pressure in the water distribution tray 3 decreases, and the sleeve 2 can move downward with the decrease of the water level, reducing the effective water inlet area of ​​the variable flow slot 11. The reduction of the effective water inlet area and the reduction of water pressure are carried out simultaneously, which can ensure that the water inlet flow rate remains unchanged at the set value, achieve the effect of steady flow, and ensure the spraying effect of the nozzle assembly. Conversely, taking the increase of the water supply flow rate of the water pump as an example, the water level in the water distribution tray 3 gradually increases, the water pressure in the water distribution tray 3 increases, and the sleeve 2 can move upward with the increase of the water level, increasing the effective water inlet area of ​​the variable flow slot 11. The increase of the effective water inlet area and the increase of water pressure are carried out simultaneously, which can ensure that the water inlet flow rate remains unchanged at the set value, achieve the effect of steady flow, and ensure the spraying effect of the nozzle assembly.

[0056] As an embodiment, the variable flow groove 11 is distributed on the side wall of the connecting pipe 1 in a spiral shape with the central axis of the connecting pipe 1 as the axis, and the spiral shape distribution is used to increase the opening area of ​​the variable flow groove 11 on the connecting pipe 1. When the variable flow groove 11 is fully opened, the water inlet flow of the connecting pipe 1 is guaranteed, and the spraying effect of the nozzle assembly is improved. Moreover, on any horizontal plane, the cross-sectional area of ​​the variable flow groove 11 distributed in a spiral shape is smaller than the cross-sectional area of ​​the variable flow groove 11 distributed vertically, ensuring that when the water inlet flow of the water distribution tray 3 is the same, the water level in the water distribution tray 3 where the variable flow groove 11 is arranged in a spiral shape is higher than the water level in the water distribution tray 3 where the variable flow groove 11 is arranged in a vertical straight line shape, thereby increasing the pressure brought by the water level height in the water distribution tray 3, thereby increasing the water flow velocity entering the connecting pipe 1, improving the spraying effect of the nozzle assembly, and reducing the influence of the variable flow groove 11 on the structural strength of the connecting pipe 1, thereby improving the structural reliability of the nozzle assembly.

[0057] Along the length direction of the variable flow groove 11, the width of the variable flow groove 11 remains unchanged, thereby ensuring that the cross-sectional area of ​​the variable flow groove 11 is the same on any horizontal plane. When the sleeve 2 adjusts the effective water inlet area of ​​the variable flow groove 11, the effective water inlet area can change evenly to achieve a steady flow effect, thereby ensuring the spraying effect of the nozzle assembly.

[0058] When the variable flow groove 11 is distributed in a spiral shape, the length direction of the variable flow groove 11 is in the shape of a spiral, and the size of the cross section of the variable flow groove 11 on any horizontal plane is the width size of the variable flow groove 11 and the cosine value of the spiral angle of the spiral. Therefore, when the width of the variable flow groove 11 remains unchanged, the cross-sectional size of the variable flow groove 11 will not change. It can also ensure that when the sleeve 2 adjusts the effective water inlet area of ​​the variable flow groove 11, the effective water inlet area can change evenly, thereby achieving a steady flow effect and ensuring the spraying effect of the nozzle assembly.

[0059] In order to further increase the water inlet flow rate of the connecting pipe 1, a water inlet 12 is further provided on the side wall of the connecting pipe 1, and the distance between the water inlet 12 and the bottom surface of the water distribution tray 3 is greater than the maximum distance between the variable flow slot 11 and the bottom surface of the water distribution tray 3. When the sleeve 2 has fully opened the variable flow slot 11 driven by the buoyancy of the water level, the sleeve 2 can continue to move with the increase of the water level, and finally open the water inlet 12. At this time, the effective water inlet area of ​​the connecting pipe 1 is the sum of the area of ​​the variable flow slot 11 and the area of ​​the water inlet 12, so that the connecting pipe 1 can further increase the water inlet flow rate on the basis of fully opening the variable flow slot 11, thereby increasing the spraying amount of the nozzle assembly.

[0060] The casing 2 is formed with a buoyancy chamber 21, which is used to reduce the mass of the casing 2, improve the sensitivity of the casing 2 driven by the water in the water distribution tray 3, and ensure reliable movement of the casing 2. Preferably, the buoyancy chamber 21 is a hollow cavity formed in the casing 2.

[0061] In order to further improve the movement reliability of the sleeve 2, the buoyancy chamber 21 is provided with an air hole 22 at the lower end of the sleeve 2. When the water level is above the lower end of the sleeve 2, the water will have the ability to flow into the buoyancy chamber 21 through the air hole. Since there is air in the buoyancy chamber 21, the water will squeeze the air when entering the buoyancy chamber 21, thereby improving the water's support capacity for the sleeve 2 and improving the movement sensitivity of the sleeve 2.

[0062] The connecting pipe 1 is provided with a first guide structure, and the sleeve 2 is provided with a second guide structure. The first guide structure and the second guide structure cooperate with each other to ensure that the sleeve 2 can move on the connecting pipe 1 along a set direction, avoid interference between the sleeve 2 and the connecting pipe 1, ensure the movement reliability of the sleeve 2, and further ensure the adjustment of the effective water inlet area of ​​the variable flow slot 11 by the sleeve 2, thereby ensuring the spraying effect of the nozzle assembly.

[0063] As an embodiment, a cover body 23 is provided at the upper end of the sleeve 2, and a first mounting structure 13 is provided at the upper end of the connecting pipe 1. A guide hole is provided on the first mounting structure 13, and the guide hole constitutes the first guide structure. A guide rod 24 is provided on the cover body 23, and the guide rod 24 constitutes the second guide structure, and the guide rod 24 is movably arranged in the guide hole. The guide hole can limit the movement of the guide rod 24, thereby realizing the movement restriction of the connecting pipe 1 on the sleeve 2. By setting the first mounting structure 13 and the cover body 23, the guiding matching position of the connecting pipe 1 and the sleeve 2 can be moved to the end of the connecting pipe 1 and the sleeve 2, avoiding the setting of an avoidance gap between the connecting pipe 1 and the sleeve 2 to set the structure for guidance, thereby ensuring the sealing effect of the sleeve 2 on the variable flow slot 11.

[0064] When the sleeve 2 moves upward to the highest position under the action of the buoyancy of water, the water level in the water distribution tray 3 continues to increase. In order to prevent the water level in the water distribution tray 3 from being too high and overflowing the water distribution tray 3, a water permeable hole is provided on the cover body 23, and a avoidance area is provided on the first mounting structure 13. The water permeable hole is connected with the interior of the connecting pipe 1 through the avoidance area. Water exceeding the height of the cover body 23 can directly flow into the connecting pipe 1 through the water permeable hole and the avoidance area, and finally be sprayed and discharged through the water outlet of the connecting pipe 1, ensuring that the water storage of the water distribution tray 3 is reliable. At the same time, the water permeable hole and the avoidance area can further increase the water inlet area of ​​the connecting pipe 1, that is, when the water level exceeds the height of the cover body 23, the connecting pipe 1 can be filled with water through all areas of the variable flow slot 11, the area of ​​the water inlet 12 and the water permeable hole, effectively improving the spraying amount and spraying efficiency of the nozzle assembly.

[0065] Since the variable flow slot 11 and the water inlet 12 are both arranged on the side wall of the connecting pipe 1, the central axis of the guide rod 24 and the central axis of the guide hole are both collinear with the central axis of the connecting pipe 1. At this time, the guide rod 24 is located at the center of the connecting pipe 1, and will not affect the flow area of ​​the variable flow slot 11 and the water inlet 12, thereby ensuring the reliable water inlet and water inlet efficiency of the connecting pipe 1.

[0066] In order to prevent the sleeve 2 from detaching from the connecting pipe 1 due to excessive water in the water distribution tray 3, a first limiting structure 25 is provided on the sleeve 2, and a second limiting structure is provided on the connecting pipe 1. The first limiting structure 25 and the second limiting structure cooperate to limit the movement distance of the sleeve 2, thereby ensuring that the sleeve 2 can move reliably on the connecting pipe 1. When there is too much water in the water distribution tray 3, the first limiting structure 25 and the second limiting structure cooperate to limit the sleeve 2 from continuing to move as the water level rises. At this time, the water permeable holes and the avoidance area come into play to drain the water in the water distribution tray 3 into the connecting pipe 1. Fig. 9 As shown, a limit block is provided at the lower end of the guide rod 24, the size of the limit block is larger than the size of the guide hole, and the limit block is located below the first mounting structure 13. As the sleeve 2 rises, the limit block gradually approaches the first mounting structure 13, and the limit block can eventually abut against the first mounting structure 13. At this time, the sleeve 2 moves to the highest position, that is, the limit block constitutes the first limit structure 25, and the first mounting structure 13 constitutes the second limit structure.

[0067] A protruding structure is also provided on the side wall of the connecting pipe 1, and the protruding structure is located between the lowest point of the variable flow slot 11 and the water outlet of the connecting pipe 1, and the connecting pipe 1 is fixed to the bottom surface of the water distribution tray 3 by the protruding structure. On the premise that the water outlet of the connecting pipe 1 is located below the water distribution tray 3, the reliable fixation between the connecting pipe 1 and the water distribution tray 3 is ensured.

[0068] In order to further improve the spraying effect and spraying range of the nozzle assembly, the nozzle assembly also includes a water distribution structure 4, and a water outlet 14 is provided on the connecting pipe 1, and the water distribution structure 4 is rotatably provided at the water outlet 14. By utilizing the rotation of the water distribution structure 4, the water discharged from the water outlet 14 of the connecting pipe 1 is rotated and sprayed, so that the water can reach a farther position, effectively improving the spraying range, and under the action of the centrifugal force of the rotation of the water distribution structure 4, the water can be decomposed into smaller water droplets, so that the water can be sprayed more evenly within the spraying range, improving the spraying effect of the nozzle assembly. Moreover, since the sleeve 2 is provided on the connecting pipe 1, the water inlet flow rate of the connecting pipe 1 remains basically unchanged, so that the rotation rate of the turntable can be well guaranteed, thereby ensuring the spraying range of the nozzle assembly and improving the spraying effect of the nozzle assembly.

[0069] In particular, the profile of the variable flow groove 11 is set to a spiral shape. On any horizontal plane, the cross-sectional area of ​​the variable flow groove 11 distributed in a spiral shape is smaller than the cross-sectional area of ​​the variable flow groove 11 distributed vertically, ensuring that when the water inlet flow rate of the water distribution tray 3 is the same, the water level in the water distribution tray 3 where the variable flow groove 11 is set in a spiral shape is higher than the water level in the water distribution tray 3 where the variable flow groove 11 is set in a vertical straight line shape, thereby increasing the pressure brought by the water level height in the water distribution tray 3, thereby increasing the flow rate of the water entering the connecting pipe 1, driving the rotation speed of the water distribution structure 4 to be faster, and further improving the spraying area and spraying effect of the sprinkler assembly.

[0070] As an embodiment, the water distribution structure 4 includes a turntable 41, which is rotatably disposed at the water outlet 14. A drainage channel 42 is formed on the turntable 41, and the profile of the drainage channel 42 is a curve. The water discharged from the water outlet 14 of the connecting pipe 1 will flow to the turntable 41, and part of the water will flow into the drainage channel 42. Due to the water inlet flow rate and the profile of the drainage channel 42 being a curve, the water flowing into the drainage channel 42 will give an extrusion force to the side wall of the drainage channel 42 during the flow process, and this extrusion force is transmitted to the turntable 41, which can drive the turntable 41 to rotate. Preferably, the profile of the drainage channel 42 is a curve, and the water will be forced to flow along the curve during the flow of water in the drainage channel 42, so that the direction of the extrusion force given to the drainage channel 42 by the water is always the same, thereby ensuring the reliable rotation of the turntable 41.

[0071] Optionally, the outflow direction of the drainage channel 42 and the inflow direction of the drainage channel 42 have an angle. Due to the existence of the angle, the flow direction of water in the drainage channel 42 will change, so the water will exert an extrusion pressure on the side wall of the drainage channel 42. This extrusion pressure is transmitted to the turntable 41, which can then drive the turntable 41 to rotate, and also ensure the reliable rotation of the water distribution structure 4.

[0072] Due to the existence of the turntable 41, the size of the turntable 41 will affect the spraying effect below the nozzle assembly. For this reason, the drainage channel 42 has a first end close to the central axis of the turntable 41, and a first water distribution channel 43 is provided on the portion of the turntable 41 between the first end and the central axis of the turntable 41. The existence of the first water distribution channel 43 ensures that when water flows onto the turntable 41, part of the water flow will flow on the turntable 41 into the drainage channel 42 to ensure the rotation of the turntable 41, and part of the water flow can directly pass through the turntable 41 through the first water distribution channel 43 and continue to flow, thereby achieving spraying of the area below the turntable 41 and ensuring the spraying effect of the nozzle assembly. Fig.11 As shown, there are multiple first water distribution channels 43, and all water distribution channels are distributed in a ring shape with the central axis of the turntable 41 as the axis, ensuring that when the turntable 41 rotates, different first water distribution channels 43 can spray the area below the turntable 41, further improving the spraying effect.

[0073] Preferably, along the direction from the top surface of the turntable 41 to the bottom surface of the turntable 41, the distance between the first water distribution channel 43 and the central axis of the turntable 41 gradually increases, that is, the first water distribution channel 43 is inclined outward relative to the central axis of the turntable 41, so that part of the water flowing through the first water distribution channel 43 will continue to spray toward the lower area of ​​the turntable 41, and part of the water can be sprayed at an inclined angle in the direction away from the central axis of the turntable 41, thereby increasing the spraying range of the first water distribution channel 43 and further improving the spraying effect and spraying uniformity.

[0074] The number of the drainage channels 42 is at least two, and all the drainage channels 42 are distributed in a ring shape with the central axis of the turntable 41 as the axis. By providing a plurality of drainage channels 42, the driving effect of water on the rotation of the turntable 41 can be improved, and the rotation of the turntable 41 can be ensured to be reliable, thereby ensuring the spraying range and spraying effect of the nozzle assembly. Fig.11 As shown, there are four drainage channels 42, and the four drainage channels 42 are evenly distributed in a ring shape on the turntable 41. The water flow rate entering each drainage channel 42 is basically the same, so that the extrusion pressure generated by water in each drainage channel 42 is basically the same. All the extrusion pressures can ensure that the turntable 41 can rotate reliably without tilting and other problems, further ensuring the reliable rotation of the turntable 41.

[0075] There is a first spacing between the first ends of two adjacent drainage channels 42, and a second water distribution channel 44 is provided on the portion of the turntable 41 corresponding to the first spacing, and the second water distribution channel 44 is utilized to continue spraying the area below the turntable 41, thereby further improving the spraying effect of the nozzle assembly, wherein, since the first water distribution channel 43 is located between the first end of the drainage channel 42 and the central axis of the turntable 41, and the second water distribution channel 44 is located between the first ends of the drainage channel 42, the diameter of the turntable 41 corresponding to the second water distribution channel 44 is larger than the diameter of the turntable 41 corresponding to the first water distribution channel 43, so that the spraying range of the second water distribution channel 44 is larger than that of the first water distribution channel 43, and the area outside the spraying range of the first water distribution channel 43 can be sprayed, thereby further improving the spraying effect of the nozzle assembly.

[0076] The distance between the second water distribution channel 44 and the central axis of the turntable 41 gradually increases from the top surface of the turntable 41 to the bottom surface of the turntable 41. That is, the second water distribution channel 44 is inclined outward relative to the central axis of the turntable 41, so that part of the water flowing through the second water distribution channel 44 will continue to spray to the lower area of ​​the turntable 41, and part of the water can be sprayed in a direction away from the central axis of the turntable 41 at an inclined angle, thereby increasing the spraying range of the second water distribution channel 44 and further improving the spraying effect and spraying uniformity.

[0077] When the water flowing onto the turntable 41 flows through the second water distribution channel 44, some of the water will continue to flow along the turntable 41. In order to facilitate this part of the water to be splashed out from the turntable 41, the two adjacent drainage channels 42 have a second spacing at the edge of the turntable 41. The thickness of the part of the turntable 41 corresponding to the second spacing is smaller than the thickness at the center axis of the turntable 41. The change in thickness can further divert the water to the edge of the turntable 41, thereby making full use of the rotation of the turntable 41 to splash out the water flowing to the second spacing, thereby ensuring the spraying effect of the nozzle assembly.

[0078] The first end of the drainage channel 42 is located outside the projection area of ​​the connecting pipe 1 on the rotating disk 41. It is ensured that the water discharged from the water outlet 14 of the connecting pipe 1 can flow through all water distribution areas after being retained in the rotating disk 41, and the water can move the first end of the drainage channel 42 to flow into the drainage channel 42, and the kinetic energy of the water in the drainage channel 42 is maximized, so that the rotating disk 41 is easier to rotate, and the spraying effect of the nozzle assembly is improved.

[0079] As an embodiment, the water distribution structure 4 further includes a drainage member 45, which is disposed on the turntable 41, and the drainage channel 42 is formed on the drainage member 45. By arranging the drainage member 45 on the turntable 41, the difficulty of processing the drainage channel 42 on the turntable 41 is reduced, and at the same time, the reliable flow of water in the drainage channel 42 is ensured, and the extrusion force can be reliably transmitted to the turntable 41 to rotate the turntable 41, thereby improving the structural reliability and working reliability of the nozzle assembly. Fig.10 As shown, the guide member 45 protrudes from the upper surface of the rotating disk 41, further restricting the water flowing into the guide channel 42, thereby preventing the water from flying out from the top of the guide channel 42 and affecting the spraying effect of the nozzle assembly.

[0080] The end of the guide member 45 away from the central axis of the turntable 41 protrudes from the edge of the turntable 41, that is, the guide member 45 is used to increase the length of the drainage channel 42, which can improve the utilization of the kinetic energy of water in the drainage channel 42 and also improve the spraying range and spraying effect of the nozzle assembly.

[0081] like Figures 10 to 14 In the illustrated embodiment, water flowing from the water outlet 14 to the turntable 41 will be sprayed at various positions by the first water distribution channel 43, the second water distribution channel 44, the edge of the turntable 41 at the second interval, and the drainage channel 42, respectively, thereby effectively ensuring the spraying effect and spraying range of the nozzle assembly.

[0082] The water distribution structure 4 also includes a rotating shaft 46, which is arranged on the turntable 41, and the upper end of the rotating shaft 46 is rotatably arranged on the connecting pipe 1 or the water distribution plate 3. Through the setting of the rotating shaft 46, the turntable 41 can be reliably rotated below the water outlet 14 of the connecting pipe 1 to ensure the spraying effect of the nozzle assembly.

[0083] The rotation axis of the rotating shaft 46 is colinear with the central axis of the connecting pipe 1, so that the water discharged from the water outlet 14 can be sprayed through the rotation of the water distribution structure 4, and the amount of water reaching each position of the turntable 41 is basically the same, avoiding the problem of water flow impacting the turntable 41 and causing the turntable 41 to deflect, thereby ensuring the reliable rotation of the turntable 41 and the reliable operation of the nozzle assembly.

[0084] A water distribution device includes the above-mentioned nozzle assembly. The water distribution device also includes a water distribution tray 3, a plurality of nozzle assemblies are evenly distributed on the water distribution tray 3, and the spraying ranges of two adjacent nozzle assemblies are tangent.

[0085] A cooling tower, comprising the above-mentioned nozzle assembly or the above-mentioned water distribution device

[0086] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A nozzle assembly, characterized in that: include: A connecting pipe (1), wherein a flow-changing groove (11) is provided on a side wall of the connecting pipe (1); A sleeve (2), the sleeve (2) being movably arranged on the connecting pipe (1), and the sleeve (2) being capable of adjusting the effective water inlet area of ​​the variable flow slot (11) by moving; The connecting pipe (1) is arranged in the water distribution tray (3), and the buoyancy of the fluid in the water distribution tray (3) can drive the sleeve (2) to move.

2. The nozzle assembly according to claim 1, characterized in that: The variable flow groove (11) is distributed on the side wall of the connecting pipe (1) in a spiral shape with the central axis of the connecting pipe (1) as the axis; and / or, along the length direction of the variable flow groove (11), the width of the variable flow groove (11) remains unchanged.

3. The nozzle assembly according to claim 1, characterized in that: A water inlet (12) is also provided on the side wall of the connecting pipe (1), and the distance from the water inlet (12) to the bottom surface of the water distribution tray (3) is greater than the maximum distance from the variable flow slot (11) to the bottom surface of the water distribution tray (3).

4. The nozzle assembly according to claim 1, characterized in that: A buoyancy chamber (21) is formed on the sleeve (2), and the buoyancy chamber (21) is provided with a vent (22) at the lower end of the sleeve (2).

5. The nozzle assembly according to claim 1, characterized in that: The connecting pipe (1) is provided with a first guiding structure, and the sleeve (2) is provided with a second guiding structure, and the first guiding structure and the second guiding structure are in guiding cooperation.

6. The nozzle assembly according to claim 5, characterized in that: The upper end of the sleeve (2) is provided with a cover body (23), the upper end of the connecting pipe (1) is provided with a first mounting structure (13), the first mounting structure (13) is provided with a guide hole, the guide hole constitutes the first guide structure, the cover body (23) is provided with a guide rod (24), the guide rod (24) constitutes the second guide structure, and the guide rod (24) is movably arranged in the guide hole.

7. The nozzle assembly according to claim 6, characterized in that: The cover body (23) is provided with a water permeable hole, the first mounting structure (13) is provided with an escape area, and the water permeable hole is connected with the interior of the connecting pipe (1) through the escape area.

8. The nozzle assembly according to claim 6, characterized in that: The central axis of the guide rod (24) and the central axis of the guide hole are both colinear with the central axis of the connecting pipe (1).

9. The nozzle assembly according to claim 1, characterized in that: The sleeve (2) is provided with a first limiting structure (25), and the connecting pipe (1) is provided with a second limiting structure, and the first limiting structure (25) and the second limiting structure cooperate to limit the moving distance of the sleeve (2).

10. The nozzle assembly according to claim 1, characterized in that: The nozzle assembly further comprises a water distribution structure (4), a water outlet (14) is provided on the connecting pipe (1), and the water distribution structure (4) is rotatably arranged at the water outlet (14).

11. The nozzle assembly according to claim 10, characterized in that: The water distribution structure (4) comprises a rotating disk (41), the rotating disk (41) being rotatably arranged at the water outlet (14), a drainage channel (42) being formed on the rotating disk (41), the profile of the drainage channel (42) being a curve; or, an outflow direction of the drainage channel (42) and an inflow direction of the drainage channel (42) having an included angle.

12. The nozzle assembly according to claim 11, characterized in that: The drainage channel (42) has a first end close to the central axis of the rotating disk (41), and a first water distribution channel (43) is provided on the portion of the rotating disk (41) between the first end and the central axis of the rotating disk (41).

13. The nozzle assembly according to claim 12, characterized in that: Along the direction from the top surface of the rotating disk (41) to the bottom surface of the rotating disk (41), the distance between the first water distribution channel (43) and the central axis of the rotating disk (41) gradually increases.

14. The spray head assembly according to claim 11, characterized in that: The number of the drainage channels (42) is at least two, and all the drainage channels (42) are distributed in a ring shape with the central axis of the rotating disk (41) as the axis.

15. The spray head assembly according to claim 14, characterized in that: There is a first distance between the first ends of two adjacent drainage channels (42), and a second water distribution channel (44) is provided on the portion of the rotating disk (41) corresponding to the first distance.

16. The spray head assembly according to claim 15, characterized in that: Along the direction from the top surface of the rotating disk (41) to the bottom surface of the rotating disk (41), the distance between the second water distribution channel (44) and the central axis of the rotating disk (41) gradually increases.

17. The spray head assembly according to claim 14, characterized in that: Two adjacent drainage channels (42) have a second spacing at the edge of the rotating disk (41), and the thickness of the portion of the rotating disk (41) corresponding to the second spacing is smaller than the thickness at the central axis of the rotating disk (41).

18. The spray head assembly according to claim 11, characterized in that: The first end of the drainage channel (42) is located outside the projection area of ​​the connecting pipe (1) on the rotating disk (41).

19. The spray head assembly according to claim 11, characterized in that: The water distribution structure (4) further comprises a drainage member (45), wherein the drainage member (45) is arranged on the rotating disk (41), and the drainage channel (42) is formed on the drainage member (45).

20. The spray head assembly according to claim 19, characterized in that: The end of the guide member (45) away from the central axis of the rotating disk (41) protrudes from the edge of the rotating disk (41).

21. The spray head assembly according to claim 11, characterized in that: The water distribution structure (4) further comprises a rotating shaft (46), wherein the rotating shaft (46) is arranged on the rotating disk (41), and the upper end of the rotating shaft (46) is rotatably arranged on the connecting pipe (1) or the water distribution disk (3).

22. The spray head assembly according to claim 21, characterized in that: The rotation axis of the rotating shaft (46) is colinear with the central axis of the connecting pipe (1).

23. A water distribution device, characterized in that: A spray head assembly comprising any one of claims 1 to 22.

24. A cooling tower, characterized in that: It comprises the nozzle assembly described in any one of claims 1 to 22 or the water distribution device described in claim 23.

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