A wide flow adaptive impeller type rotary nozzle

Abstract

The utility model discloses a wide flow adaptation's impeller type rotary shower head relates to the water distribution shower head technical field of cooling tower, including the shower head body, is equipped with the shower head mouth in the bottom, the shower head seat is set up the connecting rod in the lower extreme of shower head seat, the lower extreme of connecting rod is rotatable with the impeller part, the impeller part is located below the shower head mouth, and it includes: the bottom disc, the impeller shaft is extended in the middle upwards, the impeller piece is annular array and is set up on the impeller shaft, and the lower extreme is connected with the bottom disc, and the gap between adjacent impeller pieces constitutes the water outlet, and the water guide plate is equipped between adjacent impeller pieces and is staggered distribution with the water outlet, the water outlet hole is annular array and is set up on the bottom disc and is located below the water guide plate, the lower skirt is annular array and is set up in the bottom disc edge, and is set down to the inclination, wherein, the gap between water outlet hole and lower skirt is set up in the circumferential direction and is staggered half. The utility model discloses can still keep high water distribution uniformity, small water drop when the water inflow changes.

Description

Technical Field

[0001] This utility model relates to the field of water distribution nozzles for cooling towers, specifically an impeller-type rotary nozzle with wide flow rate adaptability. Background Technology

[0002] The uniformity of water distribution in a crossflow cooling tower directly affects its cooling capacity, and the factors affecting the uniformity of water distribution from the nozzles are: The water level in the water basin is the water column; the higher the water column, the greater the potential energy. The diameter of the nozzle basket is important; the larger the diameter, the larger the spray radius. The height of the sprinkler basket is the distance from the basket to the bottom of the water basin; the greater the distance, the greater the kinetic energy. The greater the distance from the nozzle impeller to the top of the water spray plate, the larger the spray radius. The size of the water droplets splashed out by the water jet determines the uniformity of the spray. The finer the droplets, the more even the spray. When the water flow rate changes, the water level in the water basin will constantly change, and the uniformity of the spray from the nozzle will change accordingly. Utility Model Content

[0003] To address the above problems, this utility model provides a variable flow rotating basket nozzle that can maintain high water distribution uniformity and fine water droplet formation even when the inlet water flow changes.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A wide flow rate adaptable impeller-type rotary nozzle includes a nozzle body, a nozzle seat, a connecting rod, and an impeller assembly; 1. Nozzle body It has a nozzle at the bottom and external threads on the lower outer wall; 2. Sprayer head holder The upper inner wall is provided with an internal thread that matches the external thread of the nozzle body, and the internal thread is cut off 180° circumferentially to form a semi-circular thread segment. The lower end of the nozzle holder is connected to the upper end of the connecting rod; The axial distance between the impeller component and the nozzle can be infinitely adjusted by rotating the nozzle seat. The 180° threaded structure can be quickly disassembled and replaced after scaling. 3. Connecting rod The lower end is detachably connected to the impeller assembly via screws. The screw is inserted from the bottom of the impeller shaft and locked with the thread of the connecting rod, which facilitates on-site disassembly and maintenance.

[0005] 4. Impeller assembly, located directly below the nozzle, can rotate around the connecting rod; 4.1 Chassis The impeller shaft extends upward from the center.

[0006] 4.2 Impeller Blades The impeller shaft is arranged in an arc-shaped, ring-shaped array, with its lower end connected to the chassis. The gap between adjacent impeller blades forms the water outlet channel.

[0007] 4.3 Water guide plate It is positioned between adjacent impeller blades and is arranged in an alternating manner with the water outlet; Water outlet holes are made on the chassis at the intersection of the water guide plate and the chassis.

[0008] 4.4 Hemline They are arranged in a ring array on the outer edge of the chassis, recessed downwards into an arc shape, with an inclination angle of 10°~45°; The gap between the water outlet and the lower skirt is offset by half in the circumferential direction, so that the water flow forms finer water droplets after being sheared twice by the lower skirt.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. Strong adaptability to variable flow rate Rotating the nozzle seat changes the distance between the impeller and the nozzle, allowing for real-time matching of the optimal spray radius under different flow rates, ensuring a spray uniformity coefficient of ≥94% within a flow range of 0.5~6m³ / h.

[0010] 2. Scale-resistant and easy to maintain The 180° thread cut-off structure significantly reduces the clamping force of scale on the threads, and the nozzle seat can be quickly unscrewed without tools, enabling online cleaning or complete replacement, reducing maintenance time by more than 80%.

[0011] 3. Water droplet refinement and uniform distribution The alternating structure of the arc-shaped impeller blades and the water outlet / guide plate creates multi-stage centrifugal shear in the water flow; The staggered arrangement of the water outlets and the arc-shaped lower skirt further divide the water droplets, and the median diameter D50 of the water droplets is stabilized at 550~580μm, thus basically eliminating the spray blind zone.

[0012] 4. Sturdy structure and easy assembly / disassembly The impeller component, secured by a single screw, ensures coaxiality under high-speed rotation while allowing for on-site disassembly and assembly within 30 seconds. The nozzle is completely riveted, making parts easy to interchange and reducing the total life cycle cost by more than 30%. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the nozzle assembly structure.

[0015] Figure 3This is a schematic diagram of the nozzle structure from another perspective.

[0016] Figure 4 This is a schematic diagram of the impeller component structure.

[0017] In the diagram: 1. Nozzle body; 2. Nozzle seat; 3. Connecting rod; 4. Impeller assembly; 5. Screw; 41. Impeller shaft; 42. Impeller blade; 43. Water guide plate; 44. Lower skirt; 45. Chassis; 46. Water outlet channel; 48. Water outlet hole. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution, the present invention will be described in detail below with reference to the embodiments. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0019] like Figures 1-4 The diagram shows the structure of this nozzle, and the specific implementation scheme is as follows: I. Components and Connection Relationships 1. Nozzle body 1 The nozzle body 1 is a tubular component, with its upper end connected to the outlet of the cooling tower water basin and its bottom having a round nozzle opening; the lower end of the outer wall is machined with M40×2 external threads.

[0020] 2. Nozzle holder 2 Nozzle holder 2 is in the shape of a stepped sleeve: The upper inner wall is machined with an M40×2 internal thread, and the internal thread is cut off 180° circumferentially to form two symmetrical semi-circular thread segments. A connecting rod 3 is installed on the lower side wall.

[0021] By rotating the nozzle seat 2, the axial distance between the impeller component 4 and the nozzle orifice can be steplessly adjusted within the range of 0~12mm, facilitating real-time optimization of the spray radius based on the on-site flow rate. Cutting off the 180° threaded section significantly reduces the clamping force after scaling, allowing for quick manual disassembly.

[0022] 3. Connecting rod 3 The connecting rod 3 is a stainless steel smooth rod, with an M8 external thread machined at the upper end to lock with the nozzle seat 2; and an M4 internal thread hole machined at the lower end for connection with the impeller component 4.

[0023] 4. Impeller assembly 4 4.1 Chassis 45 It has a diameter of 60mm and a thickness of 2mm, with a Φ4.2 through hole in the center for screw 5 to pass through.

[0024] 4.2 Impeller Shaft 41 It is integrally set at the center of the chassis 45, with a height of 12mm, and also has a Φ4.2 through hole in the center.

[0025] 4.3 Impeller blades 42 The impeller shaft 41 is arranged in a circular array with a radius of 25mm and a height of 10mm. The lower end is connected to the chassis 45 to ensure strength.

[0026] 4.4 Water guide plate 43 The impeller blades 42 are connected to the two sides, and the bottom end is connected to the chassis 45; so that the impeller blades 42, the guide plate 43 and the chassis 45 form a cavity, and the water outlet 48 is located at the bottom of the cavity.

[0027] 4.5 water outlet 48 Located directly below the water guide plate 43; the center of the hole and the center of the gap between the lower skirt 44 on the same side are offset by 30° circumferentially (half offset).

[0028] 4.6 hemline 44 It tilts downward at a 30° angle and is an overall concave arc shape with an arc radius of R8mm. Its edge is connected to the outer edge of the base at 45°. Its function is to shear water droplets a second time to form a more uniform water curtain.

[0029] 5. Screw 5 M4×25 stainless steel hexagon socket screws 5 are selected, which are passed through the impeller shaft 41 and the base 45 and screwed into the M4 internal thread hole at the lower end of the connecting rod 3 to achieve axial fixation of the impeller component 4; the head of screw 5 is recessed 1mm into the lower surface of the base 45 to avoid water flow interference.

[0030] II. Assembly Sequence ① Screw the nozzle holder 2 into the nozzle body 1 to the required height; ②The upper end of the connecting rod 3 is fixed to the side wall of the nozzle seat 2 by bolts; ③ Place the impeller assembly 4 onto the lower end of the connecting rod 3 and tighten it from bottom to top with screws 5; ④ Place the whole thing into the water basin, turn on the water and adjust it. If necessary, rotate the nozzle seat 2 again to fine-tune the spray radius.

[0031] III. Work Process Cooling water falls vertically from the nozzle, first impacting the arc-shaped impeller blades 42, driving the impeller component 4 to rotate at high speed; Water flows out through the outlet channel 46 and is thrown outward. At the same time, some water flows into the cavity below the guide plate 43 and passes through the outlet hole 48 to form multiple fine jets. The fine jet impacts the inner side of the lower skirt 44, where it is sheared and dispersed again, and finally evenly sprayed onto the filler as fine water droplets of 550~580μm, with a spray uniformity coefficient ≥94%.

[0032] When the inlet water flow changes, simply rotate the nozzle seat 2 to quickly match the optimal spray radius without stopping the machine or disassembling the pipe.

[0033] It should be noted that, in this document, the terms "comprising," "including," and any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Specific examples have been used in this document to illustrate the principles and implementation methods of the present invention. These examples are merely for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be pointed out that, due to the limitations of written expression and the objective existence of infinite specific structures, those skilled in the art can make several improvements, modifications, or variations without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, variations, or combinations, or the direct application of the concept and technical solution of the present invention to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A wide-flow-adaptive impeller-type rotary nozzle, characterized in that, include: The nozzle body (1) has a nozzle opening at its bottom and external threads on its lower outer wall; The nozzle seat (2) has an internal thread on its upper inner wall that mates with the external thread; a connecting rod (3) is provided at the lower end of the nozzle seat (2). The connecting rod (3) is rotatably connected to the impeller component (4) at its lower end; Impeller component (4), located below the nozzle, includes: The chassis (45) extends upward from the center to form the impeller shaft (41); Impeller blades (42) are arranged in a ring array on the impeller shaft (41), and the lower end is connected to the chassis (45); The gap between adjacent impeller blades (42) forms the water outlet channel (46); Water guide plates (43) are located between adjacent impeller blades (42) and are staggered with the water outlet (46); The water outlet (48) is arranged in a ring array on the chassis (45) and located below the water guide plate (43); The lower skirt (44) is arranged in a ring array on the edge of the chassis (45) and is inclined downward; The gap between the water outlet (48) and the lower skirt (44) is offset by half in the circumferential direction.

2. The nozzle according to claim 1, characterized in that: The impeller blade (42) is arc-shaped, so that when the water flow impacts the impeller blade (42), it drives the impeller component (4) to rotate and generate centrifugal force.

3. The nozzle according to claim 1, characterized in that: The internal thread of the nozzle seat (2) is cut off 180° circumferentially.

4. The nozzle according to claim 1, characterized in that: The connecting rod (3) is connected to the impeller component (4) by a screw (5), which is inserted from the bottom of the impeller shaft (41) and threadedly connected to the connecting rod (3).

5. The nozzle according to claim 1, characterized in that: The lower skirt (44) is a downward-concave arc shape with an inclination angle of 10°~45°.

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