JPS60132665A - Nozzle apparatus - Google Patents

Abstract

PURPOSE:To easily perform the control of flow amount distribution and the alteration of a control pattern by arbitrarily changing the flow amount ratio of a plurality of supply systems, by independently providing said supply systems to a nozzle main body. CONSTITUTION:At least two or more of supply systems A, B are independently provided to a nozzle main body 10 and the flow amount ratio of two streams A, B is selectively changed to perform the regulation or control of flow amount distribution or the alteration of a spray pattern in an extremely easy manner.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a nozzle device that allows adjustment of flow rate distribution.

[Prior art]

Conventional nozzles have a unique flow rate distribution, and it is difficult to freely adjust the flow rate distribution. This is because the flow rate distribution is uniquely determined by the structure of the nozzle. For example, the structure of a conventional nozzle called a full cone nozzle is explained as follows.

The nozzle is usually used for cooling copper strips, etc., but as shown in Figure 1, the nozzle body (1)
A core (2) having a spiral groove (2a) on the outer periphery and a through hole (2b) in the center is attached to the inside of the core (2) using an adapter (3) so as not to fall off. Therefore, if cooling water is supplied through a hose (not shown) connected to the adapter (3), a part of it will pass over the outer periphery of the core (2) and turn due to its spiral groove (2a). The other flow becomes a jet flow that travels straight through the through hole (2b) of the core (2), and these two flows merge again and are ejected from the spout (1a) of the nozzle body (1) in the form of a spray. do.

Therefore, in order to change the flow rate distribution in the nozzle of FIG. It was necessary to replace only (2) or the entire nozzle body (1).

As described above, in conventional nozzles, the flow distribution is uniquely determined due to the structure, so it has been difficult to control the flow distribution in response to the size of the material to be cooled.

[Purpose of the invention]

An object of the present invention is to provide a nozzle device in which the flow rate ratio of the two streams can be arbitrarily changed, thereby making it extremely easy to adjust or control the flow rate distribution and change the spray pattern.

[Summary of the Invention] In order to achieve the above object, the nozzle device according to the present invention is characterized in that at least two supply systems are independently provided in the nozzle body.

According to a preferred embodiment of the present invention, one of the two supply systems is connected to the nozzle body so as to generate a swirl flow, and the other to generate a jet flow. Further, the jet nozzle of the nozzle body is usually formed in a circular shape, but if it is formed into an elliptical shape, it is convenient because the spray pattern can be changed from a circular shape to a circular shape by adjusting the flow rate ratio.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 shows an embodiment of the present invention, with FIG. 2(a) being a front view and FIG. 2(b) being a sectional view. In the figure, 01 is a hollow cylindrical nozzle body, which consists of a cylindrical body α◇ with an inner diameter and an effective length L, and end plates α→α→ fixed to the front and rear ends of the cylindrical body αυ, respectively. CI4 is the nozzle body αO
It is a circular spout provided at the center of the front end plate 0, and has a diameter d, and the front edge of the mouth is chamfered at an angle θ. Reference numeral e denotes a first supply pipe constituting one supply system A for the nozzle body αO, and has an inner diameter d. The connecting position of this supply pipe Q]) to the nozzle body θ1 is in the tangential direction with a center-to-center distance of t from the jet nozzle α The first supply port is directly opened in the cylindrical body 0] of the nozzle body α0, and has the same inner diameter d as the first supply pipe Qη. (A) is the nozzle body α
1, it is a second supply pipe constituting the other supply system B, and its inner diameter is large d2. It is formed in two stages of small ds. The second supply pipe (A) is connected to the nozzle body (G).
It is fixed to the rear end plate (G) concentrically with the
C) extends into the interior of the nozzle body α1, and the second supply port (C) at the tip is positioned opposite to the jet port α♦ at an interval of 1R. The second supply port (C) has an inner diameter d3.

In the example shown in FIG. 2, the specifications are determined as follows, and the flow rate distribution when the flow rate of supply system B is changed while the flow rate of supply system A is kept constant is shown in FIGS. It is shown in (c).

(Specifications) Inner diameter of nozzle body D = 52.9 - Length of nozzle body L = 100m Nozzle diameter d = 6m Chamfering angle θ = 45° Inner diameter of supply system A a, = 12.7 ■ Inner diameter of supply system B d2=12.7w, dg=4m+
Interval t = 18 m, L = 80 m, 4 = 10111 Figure 6 (a) shows the flow rate distribution when the flow rate of supply system B is zero and only the flow rate of supply system A is used, and it is similar to that of a so-called hollow cone nozzle. They look very similar. This results in a hollow concentric spray pattern with a mountain-shaped flow rate distribution in the radial direction from the nozzle center.

Next, when the flow rate of supply system B is gradually increased, the flow rate distribution becomes flat as shown in FIG. 6(b), which is similar to that of the full cone nozzle described above.

If the flow rate of the supply system B is further increased, the injection angle becomes narrower in the flow rate distribution as shown in FIG. 5(c).

Conversely, FIGS. 4(a) to 4(c) show the case where the flow rate of the supply system A is changed while the flow rate of the supply system B is kept constant.

The flow rate distribution based on the flow rate of only the supply system B when the flow rate of the supply system A is set to zero is the same as that of a complete jet flow as shown in FIG. 4(a).

Next, when the flow rate of supply system A is gradually increased, a flat flow rate distribution similar to that shown in Fig. 3 (b) will be obtained (see Fig. 4 (b)).
.

When the flow rate of the supply system B is gradually increased, a flow rate distribution with a peak at the outer circumferential edge is obtained as shown in FIG. 4(c).

By changing the flow rate ratio of supply systems A and B in this way,
Even if the total amount delivered to the nozzle is the same, considerable control of the flow distribution is possible.

FIG. 5 shows another embodiment of the present invention, in which the spout (l
→ is the same as that in FIG. 2, with the short axis a = -6 tm and the long axis b = 10 tm, which is an ellipse. The description of each part will be omitted by giving the same reference numerals.

In a nozzle having such an elliptical ejection opening α◆, the spray nozzle turn in a plane perpendicular to the ejection direction is generally elliptical. However, even in this case, by adjusting the flow rate ratio of supply systems A and B, the spray nozzle turn can be changed as shown in FIGS. 6(a) to 6(c). In other words, when the flow rate of supply system B is set to zero and the flow rate of only supply system A is used, the spray turns into a hollow oval shape as shown in Fig. 6(a), and the flow rate of supply system A is kept constant. When the flow rate of supply system B is gradually increased, the spray nozzle gradually changes from a solid oval shape to a solid circular shape, as shown in FIGS. Same figure (
c) is a case where the flow rates of supply systems A and B are approximately the same. In this embodiment as well, the flow rate distribution can be changed in almost the same way as in FIGS. 3 and 4.

It is thus possible to vary the turn of the system spray nozzle by adjusting the flow rate ratio of feed systems A and B. This provides a variable version of the spray width of conventional oval blow nozzles or flat spray nozzles. If the size of the material to be cooled changes, it can be adjusted immediately without replacing the nozzle, and by adjusting each flow rate, the spray width can be controlled while maintaining the flow density that determines the cooling capacity. It is something that can be done forcefully.

In addition, in the above embodiment, the cooling system was explained as having two systems, but the present invention is not limited to this. In particular, with regard to the supply system A, swirling flow is more likely to occur when there are two or more systems. The effect is also promoted.

Furthermore, it goes without saying that the dimensions, shapes, etc. of each part in the above-described embodiments merely represent one experimental example and do not limit the scope of the present invention. Therefore, various design changes are possible within the scope of the present invention.

Furthermore, the nozzle device of the present invention is not only used for cooling.
It can also be used for the purpose of atomizing molten metal, etc. For example, if the nozzle device is made of refractory material, A7
．． It is possible to atomize molten metals such as Ni, Cu, and steel.

〔Effect of the invention〕

As explained above, the present invention is a variable flow rate distribution type nozzle device that can freely change the flow rate distribution by adjusting the flow rates of two or more independently provided supply systems. Therefore, the flow rate distribution can be controlled instantly and easily according to the target object, and the spray turn can be changed very easily, so the effects are enormous.

[Brief explanation of drawings]

Figure 1 (al (bl) is a front view and half sectional view showing a conventional nozzle device, Figure 2 (at (bl is a front view and a sectional view showing an embodiment of the present invention), Figure 3 (al ~ ( cl is a flow rate distribution diagram according to the embodiment of FIG. 2, which is a flow rate distribution diagram when the flow rate of supply system B is changed while the flow rate of supply system A is constant; On the contrary, c) is a flow rate distribution diagram when the flow rate of the supply system A is changed while the flow rate of the supply system B is kept constant. Front view and sectional view shown in Fig. 6 (at~(cl)
is a spray pattern diagram according to the embodiment of FIG. 5. This is a spray pattern diagram when the flow rate of supply system A is kept constant and the flow rate of supply system B is varied. A: One supply system, B: The other supply system, 0O: Nozzle body, α→: Spout, al): First supply pipe, (A): Second supply pipe 1, N): First Supply port, (c):
Second supply port. Agent Patent Attorney Sanro Kimura Figure 1 (O) (b) Figure 3 Nos.
I 'I L 'Ji7 r C'JI Kama Ogome 1 direction λ
Giant Figure 4 Non-'N Conflict' 4914 Ishi) Ini and No 26 ■ Figure 5

Claims (4)

[Claims] (1) A nozzle device characterized in that the flow distribution is made variable by independently providing at least two supply systems in the nozzle body. (2) The nozzle device according to claim 1, wherein one of the two supply systems is connected to the nozzle body so as to generate a swirl flow and the other to generate a jet flow. (3) One supply port is provided tangentially to the hollow cylindrical nozzle body, and the other supply port is provided at the center of the interior of the nozzle body, facing the ejection port at a predetermined interval. A nozzle device according to claim 2. (4) The nozzle device according to claim 1, wherein the ejection port of the nozzle body is elliptical.