CN110118507A - A kind of centrifugal rotational flow nozzle device suitable for air-conditioning system counterflow cooling tower - Google Patents

Abstract

The invention provides a centrifugal swirl hollow nozzle device suitable for counterflow cooling towers of an air conditioning system, comprising a centrifugal swirl hollow nozzle, a conical water distribution pan, a V-shaped connecting rod, a water distribution pan height adjustment hole and a water distribution hole. When the cooling water flows out through the centrifugal swirling hollow nozzle, an umbrella-shaped spray effect is formed, and the cooling water covers an annular shape. At this time, the cooling water collides with the water distribution plate under the nozzle, and the secondary spray flow distribution is carried out by the water distribution plate, forming a spray with a wider spray coverage area, good droplet splashing effect, and no obvious spray flow blank area characteristic. The distance between the water distribution plate and the outlet of the nozzle can be adjusted through the adjustment hole on the connecting rod, so that the spraying characteristics and the splashing characteristics of droplets can be adjusted to a certain extent. The device of the invention has simple structure, convenient assembly and disassembly, easy cleaning and maintenance, and is of great help to the improvement of the efficiency of the counterflow cooling tower.

Description

A Centrifugal Swirling Hollow Nozzle Applicable to Counterflow Cooling Towers of Air Conditioning Systems device

technical field

The invention belongs to the technical field of manufacturing special equipment for an air-conditioning system, is suitable for water distribution of a counter-flow cooling tower, and relates to a centrifugal swirling hollow nozzle device suitable for a counter-flow cooling tower of an air-conditioning system. The centrifugal swirl hollow nozzle device can improve the inherent shortcomings in the spray characteristics of the centrifugal swirl hollow nozzle, resulting in a larger spray coverage area, more intense cooling water splash and less spray coverage blank area , thereby improving the performance of the counterflow cooling tower.

Background technique

A cooling tower is a device that uses water as a circulating coolant to absorb heat from the system and discharge it to the atmosphere to lower the water temperature; its principle is to use water and air to exchange heat and cold to generate steam, and the steam evaporates to take away heat to achieve evaporation and heat dissipation , convective heat transfer and radiation heat transfer and other principles to dissipate the waste heat generated in industry or in refrigeration and air conditioning to reduce the water temperature of the evaporative cooling device to ensure the normal operation of the circulation system. The counterflow tower is a kind of cooling tower. From the working process, that is, the water flow falls vertically in the tower, and the direction of the air flow used to exchange heat with the water is opposite to the direction of the water flow. In this process, the flow process of water from top to bottom plays a decisive role in the heat exchange effect of cooling water in the tower. The starting point of the water flow is the nozzle located on the upper part of the counterflow tower.

The nozzle is a commonly used splashing device in the counter-flow tower. Through the nozzle, the streamed water can be turned into small water droplets, and it is sprayed evenly on the packing, so as to increase the heat exchange area between the cooling water and the counter-flow air as much as possible to achieve an increase. The purpose of large convective heat transfer coefficient. The spraying of cooling water by nozzles directly affects the efficiency, energy consumption and investment of cooling towers. Therefore, its spray characteristics are very important to the overall performance of the counterflow cooling tower.

Contents of the invention

In view of this, the present invention proposes a centrifugal swirling hollow nozzle device for spraying cooling water in a counter-flow cooling tower. The invention overcomes the inherent disadvantages of the centrifugal swirling hollow nozzle, makes the cooling water spread through the nozzle device wider and more uniform, and has less blank areas for spraying.

Technical scheme of the present invention:

A centrifugal swirling hollow nozzle device suitable for counterflow cooling towers of air conditioning systems, comprising a centrifugal swirling hollow nozzle 1, a V-shaped connecting rod 2, a conical water distribution plate 3, a water distribution hole 4 and a water distribution plate height adjustment hole 5 ;

The centrifugal swirling hollow nozzle 1 and the conical water distribution plate 3 are connected by three V-shaped connecting rods 2 at an angle of 60 degrees; The adjustment hole 5 realizes the fast connection between the centrifugal swirl hollow nozzle 1 and the conical water distribution plate 3 and the height adjustment of the water distribution plate, preventing the conical water distribution plate 3 from shaking and loosening;

The angle between the conical facade of the conical water distribution plate 3 and the horizontal direction is determined to be 15 degrees; the conical water distribution plate 3 is divided into three areas, the central circular area, the horizontal disc area and the conical Facade area; the central circular area is located in the center of the conical water distribution plate 3, which is a circular hole, and the circular hole is divided by a cross to increase strength; the horizontal disc area is located on the periphery of the central circular area, and the horizontal disc There are three rows of circular water distribution holes in staggered distribution in the area; the conical facade area is located on the periphery of the horizontal disc area, and four rows of rectangular water distribution holes are staggered in distribution; After the collision, part of the cooling water splashes outward, while part of the cooling water flows down along the conical facade, and is distributed and flows down from the water distribution hole one by one, covering the position below the nozzle; If it passes through the water distribution hole, it will be entrained by the cooling water and flow down from the large circular hole in the middle of the horizontal disc surface, without blocking the water distribution hole;

After the cooling water is sprayed from the centrifugal swirling hollow nozzle 1, it is distributed in an umbrella structure, and its expansion angle basically remains unchanged after the pressure reaches a certain value; and after the cooling water collides with the conical water distribution plate 3, it will change The direction of movement affects the cooling water spray coverage area. In this way, after a part of the cooling water collides non-perpendicularly with the conical facade, it will splash toward the outside of the nozzle device to form droplets of different sizes. The remaining cooling water is blocked by the façade, flows down along the façade, and flows out from the conical façade of the conical water distribution plate 3 and each water distribution hole 4 on the horizontal disc surface in sequence, thereby filling the area directly below the nozzle.

The height adjustment hole of the water distribution plate has two functions: first, it can ensure the stable connection between the nozzle and the water distribution plate by fastening the screws, and there will be no deflection and shaking of the water distribution plate during the use of the nozzle device ; Second, the height of the water distribution plate can be adjusted according to the actual situation of the cooling tower to partially change the spray characteristics of the nozzle device to meet the adjustment requirements of the cooling tower performance.

Compared with existing technology, the beneficial effect of the present invention:

(1) In order to achieve a better dispersion effect of the working medium in the traditional centrifugal swirl hollow nozzle, the pressure loss of the working medium in the nozzle is relatively large. The invention optimizes the internal structure and inlet size of the nozzle, so that the pressure drop of the working medium is greatly reduced, thereby reducing the power consumption of the cooling tower feed water pump and saving the operating cost of the cooling tower.

(2) The design of the connecting rod of the water distribution plate makes the distance between the water distribution plate and the outlet of the nozzle adjustable, which enhances the applicability of the nozzle device to the operating conditions of the cooling tower.

(3) The spraying coverage of the nozzle device is wide, and the cooling water dispersion effect is obvious, which greatly increases the heat exchange area between the cooling water and the counterflow air, reduces the spraying blank area on the surface of the cooling tower packing, and improves the efficiency of the cooling tower. overall performance.

Description of drawings

Fig. 1 is the front view of a kind of centrifugal swirl hollow nozzle device suitable for air-conditioning system counter-flow cooling tower of the present invention.

Fig. 2 is a top view of a centrifugal swirl hollow nozzle device suitable for a counterflow cooling tower of an air conditioning system according to the present invention.

In the figure: 1 centrifugal swirl hollow nozzle; 2 conical water distribution plate; 3 V-shaped connecting rod; 4 height adjustment hole of water distribution plate; 5 water distribution hole.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1-Figure 2, a centrifugal swirl hollow nozzle device suitable for counterflow cooling towers in air conditioning systems, including centrifugal swirl hollow nozzle 1, V-shaped connecting rod 2, conical water distribution plate 3, water distribution Hole 4 and water distribution plate height adjustment hole 5;

The centrifugal swirling hollow nozzle 1 and the conical water distribution plate 3 are connected by three V-shaped connecting rods 2 at an angle of 60 degrees; The adjustment hole 5 realizes the fast connection and height adjustment between the centrifugal swirling hollow nozzle 1 and the conical water distribution plate 3, and prevents the conical water distribution plate 3 from shaking and loosening;

The angle between the conical facade of the conical water distribution plate 3 and the horizontal direction is determined to be 15 degrees; the conical water distribution plate 3 is divided into three areas, the central circular area, the horizontal disc area and the conical Facade area; the central circular area is located at the center of the conical water distribution plate 3, which is a circular hole with D=61mm, and the circular hole is divided by a cross to increase strength; the horizontal disc area is located on the periphery of the central circular area , There are three rows of 108 circular water distribution holes in staggered distribution in the horizontal disc area; the tapered façade area is located on the periphery of the horizontal disc area, and there are four rows of 145 rectangular water distribution holes in staggered distribution.

The cooling water is boosted by the feed water pump, enters the nozzle from the inlet of the centrifugal swirl hollow nozzle 1, generates a swirling motion, and is sprayed out from the outlet of the centrifugal swirl hollow nozzle 1, forming an umbrella-shaped curtain-like flow distribution. When the curtain-shaped cooling water collides with the 15-degree conical facade of the conical water distribution plate 3, part of the cooling water is further dispersed due to the impact of the collision, forming droplets of different sizes and splashing outward, expanding the nozzle device. The spray coverage increases the convective heat transfer coefficient between the cooling water and the counterflow air, and strengthens the heat transfer, thereby improving the overall performance of the cooling tower; another part of the cooling water is generated on the conical façade with the conical water distribution plate 3 After the collision, it flows downward along the surface of the conical facade, and flows to the filler in turn through the water distribution holes in the conical facade and the horizontal part, filling the spray blank area directly below the nozzle device. In addition, when the cooling water is entrained with larger impurities, the impurities will be entrained by the cooling water and flow down from the large through hole in the central horizontal part of the conical water distribution pan 3, so as not to block the water distribution holes on the conical water distribution pan 3, so as to affect The spray characteristics of the nozzle.

Finally, it is noted that the above embodiments are only used to illustrate the technical solution of the present invention and not limit it. Other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solution of the present invention, such as changes and equivalent replacements to the elements of the present invention , the changes made according to the guidance of the present invention are suitable for special situations or materials, as long as they do not deviate from the spirit and scope of the technical solutions of the present invention, they should all be included in the scope of the claims of the present invention.

Claims (5)

1. A centrifugal swirl hollow nozzle device suitable for air-conditioning system counterflow cooling towers, characterized in that, the centrifugal swirl hollow nozzle device comprises a centrifugal swirl hollow nozzle (1), a V-shaped connecting rod (2), conical water distribution plate (3), water distribution hole (4) and water distribution plate height adjustment hole (5); The centrifugal swirling hollow nozzle (1) and the conical water distribution plate (3) are connected by three V-shaped connecting rods (2) at an angle of 60 degrees; the connection of the V-shaped connecting rods (2) There are height adjustment holes (5) for the water distribution plate at different heights to realize the fast connection between the centrifugal swirling hollow nozzle (1) and the conical water distribution plate (3) and to adjust the height of the water distribution plate to prevent the conical water distribution The disc (3) shakes and loosens; The angle between the conical facade of the conical water distribution plate (3) and the horizontal direction is determined to be 15 degrees; the conical water distribution plate (3) is divided into three areas, the central circular area, the horizontal disc area and tapered facade area; the central circular area is located in the center of the conical water distribution pan (3), which is a circular hole, and the circular hole is divided by a cross to increase strength; the horizontal disc area is located in the central circular area On the periphery, there are three rows of circular water distribution holes in a staggered arrangement in the horizontal disc area; the conical facade area is located on the periphery of the horizontal disc area, and there are four rows of rectangular water distribution holes in a staggered arrangement; when the cooling water and the conical water distribution plate (3) After the collision of the 15-degree conical facade, part of the cooling water splashes outward, while part of the cooling water flows down along the conical facade, and is distributed successively from the water distribution holes to cover the position below the nozzle; when there are large-sized impurities in the cooling water When the debris cannot pass through the water distribution hole, it will be entrained by the cooling water and flow down from the circular hole without blocking the water distribution hole. 2. The centrifugal swirl hollow nozzle device according to claim 1, characterized in that, the central circular area is a circular hole with D=61 mm. 3. The centrifugal swirling hollow nozzle device according to claim 1 or 2, characterized in that there are three rows of 108 circular water distribution holes distributed in staggered rows in the horizontal disk area. 4. The centrifugal swirling hollow nozzle device according to claim 1 or 2, characterized in that, four rows of 145 rectangular water distribution holes are arranged in staggered arrangement in the said tapered facade area. 5. The centrifugal swirling hollow nozzle device according to claim 3, characterized in that, four rows of a total of 145 rectangular water distribution holes are arranged in a staggered arrangement in the tapered elevation area.