阅读说明：本技术 一种小型低流阻的旋流喷雾喷嘴 (Small low-flow-resistance swirl spray nozzle ) 是由 程文龙 赵锐 郑磊 付豪 潘宇晖 陈健 于 2021-09-29 设计创作，主要内容包括：本发明涉及一种小型低流阻的旋流喷雾喷嘴,属于压力旋流喷嘴技术领域。包括旋流器接头和喷嘴外壳；旋流器接头的轴向一端为圆锥端,轴向另一端设有六边形的进液孔；进液孔的孔壁上均布开设有两个以上的导流道；喷嘴外壳的封闭端的轴向中心开设有喷孔；喷嘴外壳内设有内圆锥台；旋流器接头的圆锥端和喷嘴外壳的内圆锥台之间形成漏斗状的旋流腔；旋流器接头上两个以上的导流道的出口位于旋流腔内；工作时,流体从进液孔进入,通过导流道进入旋流腔,在旋流腔内形成旋流,再经喷孔喷出。本发明旋流喷雾喷嘴内部流道的流动阻力小,在1.5bar的喷头压力下能够获得35°～45°的喷雾锥角；在2bar的压力下能够获得不小于10L/h的喷雾流量,有利于降低系统所需泵功率。(The invention relates to a small low-flow-resistance swirl spray nozzle, and belongs to the technical field of pressure swirl nozzles. Comprises a swirler joint and a nozzle shell; one axial end of the cyclone joint is a conical end, and the other axial end of the cyclone joint is provided with a hexagonal liquid inlet hole; more than two flow guide channels are uniformly distributed on the wall of the liquid inlet hole; the axial center of the closed end of the nozzle shell is provided with a spray hole; an inner cone frustum is arranged in the nozzle shell; a funnel-shaped rotational flow cavity is formed between the conical end of the cyclone joint and the inner conical table of the nozzle shell; outlets of more than two flow guide channels on the cyclone joint are positioned in the cyclone cavity; when the device works, fluid enters from the liquid inlet hole, enters the vortex cavity through the flow guide channel, forms a vortex in the vortex cavity and is sprayed out through the spray holes. The flow resistance of the internal flow passage of the swirl spray nozzle is small, and a spray cone angle of 35-45 degrees can be obtained under the pressure of a spray head of 1.5 bar; the spray flow rate of not less than 10L/h can be obtained under the pressure of 2bar, and the pump power required by the system is favorably reduced.)

1. A small low flow resistance swirl spray nozzle, characterized in that: comprises a swirler joint (1) and a nozzle shell (6), which are coaxially and fixedly connected through threads;

the cyclone joint (1) is a screw, one axial end is a conical end (12), and the other axial end is provided with a hexagonal liquid inlet hole (2); more than two flow guide channels (4) penetrating through the hole wall are uniformly distributed on the hole wall of the liquid inlet hole (2) adjacent to the conical end (12);

the nozzle shell (6) is a short pipe with one closed end, and the axial center of the closed end of the nozzle shell (6) is provided with a spray hole (7); the inner part of the closed end of the nozzle shell (6) is provided with an inner conical table (61); the conical end (12) of the swirler joint (1) is coaxially and fixedly positioned in the closed end of the nozzle shell (6) through threaded connection, and a funnel-shaped swirling flow cavity (5) is formed between the conical end (12) of the swirler joint (1) and an inner conical platform (61) of the nozzle shell (6); the outlets of more than two flow guide channels (4) on the cyclone joint (1) are positioned in the cyclone cavity (5);

when the device works, fluid enters the connecting joint (1) from the liquid inlet hole (2), enters the vortex cavity (5) through more than two flow guide channels (4), forms a vortex in the vortex cavity (5), and then is sprayed out to form conical spray through the spray holes (7).

2. A compact, low flow resistance swirl spray nozzle according to claim 1 wherein: the axial height of a funnel-shaped swirl cavity (5) between the conical end (12) of the swirler joint (1) and the inner cone (61) of the nozzle shell (6) is 0.5-1.0 mm, so that the swirl velocity loss of a main flow area is reduced.

3. A compact, low flow resistance swirl spray nozzle according to claim 1 wherein: the distance between the axis of the liquid inlet (2) and the axis of the flow guide channel (4) is h, and the ratio of the distance h to the diameter of the flow guide channel (4) is 2.0-4.0.

4. A compact, low flow resistance swirl spray nozzle according to claim 1 wherein: three flow guide channels (4) penetrating through the hole wall are uniformly distributed on the hole wall of the liquid inlet hole (2) of the cyclone joint (1), and outlets of the three flow guide channels (4) are positioned at the cyclone joint (1) and are cylindrical; the three flow guide channels (4) are uniformly distributed around the axis of the nozzle according to an angle of 120 degrees.

5. A compact, low flow resistance swirl spray nozzle according to claim 1 wherein: the included angle between the axis of each flow guide channel (4) and the hole wall is 20-30 degrees.

6. A compact, low flow resistance swirl spray nozzle according to claim 1 wherein: a cylindrical boss (11) protruding outwards in the radial direction is arranged in the middle of the outer surface of the cyclone joint (1), and the screw is divided into two sections by the cylindrical boss (11); when the swirler joint (1) is in threaded connection with the nozzle shell (6), the axial end face of one side of the cylindrical boss (11) of the swirler joint (1) is in contact spacing with the opening end face of the nozzle shell (6), and meanwhile, the sealing of the swirling flow cavity (5) is realized.

7. A compact, low flow resistance swirl spray nozzle according to claim 1 wherein: the diameter of the flow guide channel (4) is 1.0-1.2 mm.

Technical Field

The invention belongs to the technical field of pressure swirl nozzles, and particularly relates to a low-flow-resistance small-sized pressure swirl spray nozzle.

Background

The spray nozzle plays a key role in various engineering application fields, wherein the pressure swirl nozzle has a better spray opening angle and excellent atomization quality, and a single nozzle can effectively cover a larger range and has good application in the aspect of liquid spray atomization.

In the practical application of the nozzle, many problems will be faced. The nozzle has a fixed spray flow-pressure curve according to the self design, in order to achieve the spray flow required by a single nozzle, the power of a spray pump needs to be improved to increase the pressure of the nozzle, and if the flow of the selected nozzle under the same pressure is lower, the total power consumption of the system can be increased; the nozzle is easy to be blocked by impurities in the supply liquid in the long-time working process, so that the problems of reduced spraying quality, reduced flow and the like are caused, the nozzle needs to be maintained or updated, and if the internal flow channel of the nozzle is complex, the cleaning and maintenance work of the nozzle is difficult.

Disclosure of Invention

In order to effectively reduce the pump power required by spraying, enhance the compactness of the system design and facilitate maintenance, the invention provides a small-sized low-flow-resistance swirl spray nozzle.

A small-sized low-flow-resistance swirl spray nozzle comprises a swirler joint 1 and a nozzle shell 6 which are coaxially and fixedly connected through threads;

the cyclone joint 1 is a screw, one axial end is a conical end 12, and a hexagonal liquid inlet hole 2 is formed in the other axial end; more than two flow guide channels 4 penetrating through the hole wall are uniformly distributed on the hole wall of the liquid inlet hole 2 adjacent to the conical end 12.

The nozzle shell 6 is a short pipe with one closed end, and the axial center of the closed end of the nozzle shell 6 is provided with a spray hole 7; the inner part of the closed end of the nozzle shell 6 is provided with an inner conical table 61; the conical end 12 of the swirler joint 1 is coaxially and fixedly positioned in the closed end of the nozzle shell 6 through threaded connection, and a funnel-shaped swirling flow cavity 5 is formed between the conical end 12 of the swirler joint 1 and the inner conical platform 61 of the nozzle shell 6; the outlets of more than two flow guide channels 4 on the cyclone joint 1 are positioned in the cyclone cavity 5;

when the device works, fluid enters the connecting joint 1 from the liquid inlet hole 2, enters the cyclone cavity 5 through more than two flow guide channels 4, forms cyclone in the cyclone cavity 5, and then is sprayed out in a conical shape through the spray holes 7.

The further technical scheme is as follows:

the axial height of the funnel-shaped swirl chamber 5 between the conical end 12 of the swirler joint 1 and the inner cone 61 of the nozzle housing 6 is 0.5-1.0 mm to reduce the swirl velocity loss of the main flow zone.

The distance between the axis of the liquid inlet 2 and the axis of the flow guide channel 4 is h, and the ratio of the distance h to the diameter of the flow guide channel 4 is 2.0-4.0.

Three flow guide channels 4 penetrating through the hole wall are uniformly distributed on the hole wall of the liquid inlet hole 2 of the cyclone joint 1, and outlets of the three flow guide channels 4 are positioned at the cyclone joint 1 and are cylindrical; the three flow leaders 4 are evenly distributed around the nozzle axis at an angle of 120 °.

The included angle between the axis of each flow guide 4 and the hole wall is 20-30 degrees.

The middle part of the outer surface of the cyclone joint 1 is provided with a cylindrical boss 11 which protrudes outwards in the radial direction, and the screw is divided into two sections by the cylindrical boss 11; when the swirler joint 1 is in threaded connection with the nozzle shell 6, the axial end face of one side of the cylindrical boss 11 of the swirler joint 1 is in contact limit with the opening end face of the nozzle shell 6, and meanwhile, the sealing of the swirling flow cavity 5 is realized.

The diameter of the flow guide 4 is 1.0-1.2 mm.

The beneficial technical effects of the invention are embodied in the following aspects:

1. the flow resistance generated by the internal flow passage of the nozzle structure designed by the invention is small, a good spray cone can be obtained under a small pressure of the spray head, and the nozzle designed by the invention can obtain a spray cone angle of 35-45 degrees under the pressure of the spray head of 1.5bar through experimental determination;

2. the device can obtain larger spray flow under lower nozzle pressure, and through experimental determination, the device can obtain the spray flow not less than 10L/h under the pressure of 2bar, thereby being beneficial to reducing the pump power required by the system;

3. the nozzle designed by the invention comprises two main parts, namely a swirler and a nozzle shell, which are connected by threads and are easy to disassemble, and the internal rotational flow cavity is a cavity formed by installing the two parts, and the internal flow channel can be directly cleaned after the two parts are disassembled, so that the operation is convenient when the blockage problem is solved;

4. the nozzle structure of the invention has smaller design size, the diameter is 10mm, the smaller space can be effectively utilized, the structural design of the system is favorable to be optimized, and the overall structure of the system can be more compact.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is an exploded view of a component of the present invention.

Fig. 3 is a cross-sectional view of the present invention.

Fig. 4 is a sectional view a-a of fig. 3.

Sequence numbers in the upper figure: the cyclone device comprises a cyclone connector 1, a liquid inlet 2, a cyclone device inner wall 3, a flow guide channel 4, a cyclone cavity 5, a nozzle shell 6, a spray hole 7 and a cylindrical boss 11.

Detailed Description

The invention will be further described by way of example with reference to the accompanying drawings.

Referring to fig. 1, a small low flow resistance swirl spray nozzle includes a swirl nozzle adapter 1 and a nozzle housing 6, which are coaxially and fixedly connected by a screw thread.

Referring to fig. 2, the cyclone joint 1 is a screw, one axial end is a conical end 12, and the other axial end is provided with a hexagonal liquid inlet hole 2; the sides of the hexagon are 2 mm. Three flow guide channels 4 penetrating through the hole wall are uniformly distributed on the hole wall of the liquid inlet hole 2 adjacent to the conical end 12, as shown in figure 4. The diameter of the flow guide channel 4 is 1mm, the distance h between the axis of the liquid inlet 2 and the axis of the flow guide channel 4 is 2mm, and the ratio of the distance h to the diameter of the flow guide channel 4 is 2.0. The cyclone joint 1 where the outlets of the three flow guide channels 4 are located is cylindrical, the three flow guide channels 4 are uniformly distributed around the axis of the nozzle according to an angle of 120 degrees, the included angle between the axis of each flow guide channel 4 and the hole wall is 25 degrees, and the included angle is shown in fig. 4.

Referring to fig. 2, a cylindrical boss 11 protruding radially outwards is arranged in the middle of the outer surface of the cyclone joint 1, and the screw is divided into two sections by the cylindrical boss 11. The diameter of the cylindrical boss 11 is 10mm, and the thickness is 1 mm. Referring to fig. 3, when the swirler joint 1 and the nozzle housing 6 are screwed, the axial end surface of one side of the cylindrical boss 11 of the swirler joint 1 contacts and limits the opening end surface of the nozzle housing 6, and at the same time, the sealing of the swirling chamber 5 is realized.

Referring to fig. 3, the nozzle housing 6 is a short tube with a closed end, the diameter of the short tube is 10mm, and the closed end is contracted to 5 mm. The axial center of the closed end of the nozzle shell 6 is provided with a spray hole 7, and the diameter of the spray hole 7 is 0.4 mm. The inner part of the closed end of the nozzle shell 6 is provided with an inner conical table 61; the conical end 12 of the swirler joint 1 is coaxially and fixedly positioned in the closed end of the nozzle shell 6 through threaded connection, and a funnel-shaped swirling flow cavity 5 is formed between the conical end 12 of the swirler joint 1 and the inner conical platform 61 of the nozzle shell 6; the axial height of the swirl chamber 5 is 0.9mm to reduce the loss of swirl velocity in the main flow zone. The outlets of the three flow guide channels 4 on the cyclone joint 1 are positioned in the cyclone cavity 5.

When the cyclone separator works, the cyclone separator joint 1 is installed on the liquid inlet pipeline through threaded connection. Liquid is pumped in through the liquid inlet hole 2 by the liquid pump and enters the vortex cavity 5 through the three flow guide channels 4, and the liquid can generate vortex and is finally sprayed out through the spray holes 7 to form a fog cone because the axes of the flow guide channels 4 deviate from the axis of the vortex cavity 5. The determination shows that under the pressure of 1.5-2 bar, the spray cone angle of about 40 degrees is obtained, when the pressure is increased continuously, the spray cone angle is not changed obviously, and when the pressure of the nozzle is 2bar, the spray flow is 170.8 ml/min.