JPH0418676Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a nozzle that spouts a fluid such as nitrogen gas or air (hereinafter simply referred to as air), and is useful for draining and drying various products, as a gas shield, etc. This is a widely used air curtain nozzle.

[Prior art]

Generally, an air curtain nozzle has a slit-shaped or multi-hole-shaped outlet, and blows out room temperature or heated air from the outlet.

By the way, conventional nozzles have an air outlet formed on the bottom surface of the main body and an air introduction part formed on the central upper surface of the main body, so strong air is ejected from the air outlet located below the introduction part. The air was being ejected unevenly, with weak air being ejected from both sides.

Furthermore, in other conventional nozzles, the air introduction is provided on the side of one end of the main body, so the air sent from the introduction comes into contact with the wall on the opposite side and is ejected from the outlet on the bottom. The force gradually weakened from the outlet located away from the air outlet toward the outlet closer to the introduction section. In some cases, the introduction part is provided on the side surfaces of both ends of the main body, but this results in an uneven result in that the central part of the outlet is strong and both side parts are weak.

[Problem that the invention attempts to solve]

The present invention aims to provide an air curtain nozzle that makes the state of air ejected uniformly from the outlet.

[Means for solving problems]

The air curtain nozzle of the present invention forms a double nozzle with an internal cylindrical nozzle with an air introduction section on the side surface of one end, and an external square nozzle surrounding it. The present invention is characterized in that an air outlet is formed along the longitudinal direction, and an opening for air rectification is formed at a predetermined position of the inner cylindrical nozzle that is farthest from the outlet forming position of the outer square nozzle.

〔Example〕

The present invention will be explained with reference to the embodiments shown in the drawings.

Fig. 1 is a plan view of the present invention, Fig. 2 is a left side view of the invention, Fig. 3 is a right side view of the same, Fig. 4 is a partially sectional front view, and Fig. 5 is a longitudinal cross-section of the center of the previous figure. FIG. 3 is an enlarged end view.

In the figure, numeral 1 is a round pipe-shaped internal cylindrical nozzle, 2
is an external square nozzle shaped like a square pipe, and each nozzle is made of an appropriate material such as stainless steel or iron. An air introduction part 3 is provided on the side surface of one end of the internal cylindrical nozzle 1 and is connected to a compressor, etc., and the air that enters the internal cylindrical nozzle 1 from this introduction part 3 passes through an opening 4 for rectification. It flows out from the internal cylindrical nozzle, and flows out from the outlet 5 of the external square nozzle 2.
A uniform blowout is made from this point.

Reference numerals 6 and 7 are mounting brackets, and each bracket has three small holes 6a, 6b, 6c, 7a, and 7 in a triangular shape to enable fine adjustment of the mounting position.
b and 7c are drilled respectively. Also code 8
is a partition plate provided as necessary, and has a rectifying function to prevent air from swirling inside the nozzle.

First, to use the nozzle of the present invention, a pin or bolt is inserted into either of the small holes of the brackets 6, 7, and the brackets are properly selected and tightened so that the air is blown out at a desired angle.

When air is introduced into the internal cylindrical nozzle 1 in this state, the air is sent into the external square nozzle via the opening 4. In this case, the air pressure is weak near the opening near the introduction part 3, and the air pressure is strong near the opening on the other end side. Therefore, a first rectification action is first performed according to the internal pressure difference of the air exiting the opening (point A), and then a second rectification action occurs that collides with one internal corner of the external square nozzle and branches left and right. The action is performed (point B), and the inner cylindrical nozzle 1 and the outer square nozzle 2
A third rectifying action is performed at point C, where the gap between the two ends becomes smaller.

In addition, some of the air collides with one inner corner of the external rectangular nozzle at point D, and when changing direction, a fourth rectification effect is performed, and the air flows between the internal cylindrical nozzle 1 and the external rectangular nozzle 2.
The fifth rectifying action is performed at point E where the gap between the
A rectifying action is performed.

The opening 4 and outlet 5 of the present invention are formed in the shape of a slit or a plurality of small holes.

[Effect of idea]

This invention has the advantage of adopting a simple air inlet structure that is common in the past, but the air is rectified in six stages as described above, and the difference in internal pressure is reduced each time, so that the air is finally blown out. It exhibits an excellent effect in that uniform air is blown out from the outlet 5.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the present invention, Fig. 2 is a left side view of the invention, Fig. 3 is a right side view of the same, Fig. 4 is a partially sectional front view, and Fig. 5 is a longitudinal cross-section of the center of the previous figure. FIG. 3 is an enlarged end view. DESCRIPTION OF SYMBOLS 1...Internal cylindrical nozzle, 2...External square nozzle, 3...Introduction part, 4...Opening part, 5...Blowout port, 6, 7...Bracket, 6a, 6b, 6c,
7a, 7b, 7c...Small hole, 8...Partition plate.

Claims (1)

[Scope of utility model registration request] An internal cylindrical nozzle with an air inlet on the side surface of one end and an external square nozzle surrounding it form a double nozzle, and an air outlet is provided along the longitudinal direction at one corner of the external square nozzle. A nozzle for an air curtain, characterized in that an opening for air rectification is formed at a predetermined position of an internal cylindrical nozzle that is farthest from a position where an air outlet is formed of the external square nozzle.