JPS649045B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a homogenizer, that is, a high-pressure homogenizer.

(Prior art) Generally, for example, homogenization refers to creating a uniform emulsified state by physically finely pulverizing fat and protein particles in milk, and products used for such homogenization This is called a high-pressure homogenizing machine. The conventional high-pressure homogenizer has a valve seat 1 as shown in Figure 7.
High-pressure liquid is supplied from a supply channel 2 formed in
The fluid collides with the breaker ring 5 through the flow path gap 4 formed between the valve seat 1 and the valve 3, and is discharged through the valve sleeve 6 into the discharge flow path 7. It is designed to be able to move back and forth. It is also operated by the oil pressure in the hydraulic cylinder 10. In FIG. 7, 11 is a valve body, and 12 is a hydraulic cylinder cover.

(Problems to be Solved by the Invention) According to the conventional homogenizing machine as described above, since the liquid flows from the supply passage 2 toward the outside of the valve 3, the supply passage 2 side of the valve seat is connected to the flow passage. It has the smallest area and the highest pressure. As one goes outward, the area of the flow path becomes larger and the pressure becomes lower.
This becomes clear when considering the frictional state of the channel gap.

Therefore, the sudden pressure difference flowing out from the channel gap 4 is only about half of the pressurizing pressure. Then, it collides with the breaker ring 5 at a flow rate corresponding to approximately half of the pressurizing pressure, and homogenization is performed.

Therefore, in order to improve homogenization, the pressurizing pressure must be increased.

Increasing the pressurizing pressure in this manner has the disadvantage of unnecessarily increasing the size of the homogenizer and consuming energy unnecessarily.

(Means for solving the problem) Therefore, the technical problem of this proposal is to provide a homogenizer, that is, a high-pressure homogenizer that can improve homogenization without increasing the pressurizing pressure. The technical means of the present invention to solve the problem is to form a supply flow path gap between the valve and the valve seat that can be adjusted inward from the outer periphery, and to form a gap between the valve and the valve seat in the axial center of the valve and the valve seat. A discharge passage branching in opposite directions is formed so that liquid collision occurs in the passage gap where the supply passage and the discharge passage intersect, and the supply passage gap formed between the valve and the valve seat is In this method, a plurality of concave and convex portions having a chevron-shaped cross section are formed, and the liquid is cavitated at the chevron-shaped portions.

(Effects of the Invention) According to the present invention, the following effects are achieved. That is, in the conventional valve, the liquid flows outward from the center of the valve, so that the sudden pressure difference is only about half of the pressurizing pressure.

However, according to the present invention, the flow is completely opposite to the conventional flow as described above, and flows from the outside of the valve toward the center of the valve.

Therefore, the pressure drop in the flow path gap is caused only by flow resistance and hardly drops. Therefore, a pressure difference substantially equivalent to the pressurizing pressure can be obtained. Then, since the collision occurs head-on, the collision occurs at a flow velocity corresponding to the applied pressure and at a flow velocity twice that of the original impact. Therefore, a homogeneous effect can be obtained at lower pressurizing pressures compared to conventional ones.

Moreover, the liquid passes through the mountain-shaped part formed in the flow path gap between the valve and the valve seat with the same pressure and increasing flow velocity, and the liquid flows from the outside where the homogenizing effect is small to the inside, so that pre-emulsification is prevented. By gradually increasing the effect and then homogenizing it all at once through collision, a homogeneous effect with little variation can be obtained.

In addition, in the conventional type, the liquid collides with the breaker ring, causing wear, but in the case of the present invention, the collision occurs between the liquids, so there is no wear due to collision, and the homogeneity effect is improved by using the energy. It has characteristics.

(Example) The embodiments shown in the drawings will be described below.

In FIG. 1, 13 is a valve seat, and 14 is a corresponding valve.

Discharge passages 15 and 16 are formed in the axial center of the valve seat 13 and the valve 14, respectively.

In addition, an adjustable flow path gap (slit) 17 formed by the valve seat 13 and the valve 14 is formed with uneven parts 18a and 18b having a chevron-shaped cross section as shown in FIG. are doing.

Around the valve 14 and the valve seat 13 there is a valve sleeve 19 at a certain distance, in which a hole 20 is provided.

A supply channel 21 opens into the valve sleeve 19 .

The discharge passages 15 and 16 described above are connected to an annular passage 23 provided in the valve body 22, join together, and are discharged from the discharge port 24.

A valve rod 25 is reciprocated by oil supplied to the cylinder 27 through a hole 30 and a spring 26 to press the valve.

Note that 28 is a hydraulic cylinder cover, and 29 is a hydraulic cylinder main body.

2 and 3 are a cutaway front view and a cutaway plan view of the valve sleeve, which is ring-shaped and has a truncated projection 19a at the portion that abuts the valve seat 13.

FIG. 4 shows an enlarged cross-sectional view of the chevron-shaped portion in the supply channel gap.

Now, as shown in FIG. 1, when the liquid is sent from the supply channel 21, it is sent through the hole 20 of the valve sleeve 19 to the chevron-shaped portion 18 of the channel gap 17, where it passes with the same pressure and increasing flow rate. Therefore, a preliminary emulsification effect can be obtained in the mountain-shaped portion.

Then, the liquids passing through the supply channel gap 17 collide head-on and flow into the discharge channels 15 and 16.

The liquid collides head-on at a flow velocity that is equivalent to the pressurized pressure, with almost no pressure drop at the mountain-shaped portion due to flow resistance, so the liquid collides at twice the flow velocity compared to the conventional one.

Of course, those on the outside of the flow will receive a somewhat weaker impact, but the cavitation will be stronger accordingly.

In this case, if the discharge channel 16 is not present, the flow of the liquid will change, creating an undesirable vacuum state in the liquid.

In any case, since the flow flows from the outside, where the homogenizing effect is low, to the inside, the preliminary emulsification effect is gradually increased, and then the homogenizing effect is achieved all at once by collision, thereby achieving a homogeneous effect with little variation.

The thus homogenized liquid flows through the discharge channels 15 and 16.
The water is branched into the annular flow path 23, merges at the discharge port 24, and is discharged.

FIG. 5 shows a modification of the valve and valve seat, in which the outlet of the discharge passage 16 in the valve 14 is not opened but is blocked, and instead an outlet hole 31 is formed in the lateral direction.

Further, the discharge passage 15 of the valve seat 13 is connected to an inclined radial groove 32 formed into equal parts.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of the high-pressure homogenizer of the present invention, Figure 2
3 is a cutaway plan view of the valve sleeve, FIG. 4 is an enlarged sectional view of the chevron-shaped portion, and FIGS. 5 and 6 are sectional views showing modified examples of the valve seat and valve. A plan view of the valve, and FIG. 7 is a cutaway front view showing a conventional high-pressure homogenizer. 13... Valve seat, 14... Valve, 15, 16... Discharge channel, 17... Supply channel gap, 18... Chevron shaped portion, 19... Valve sleeve, 20... Hole in valve sleeve, 21 ...Supply channel.

Claims (1)

[Claims] 1. A supply flow path gap is formed between the valve and the valve seat that can be adjusted inward from the outer periphery, and a discharge flow path is formed in each of the axial centers of the valve and the valve seat that branches in opposite directions. The liquid is configured to collide with the liquid in the flow path gap where the supply flow path and the discharge flow path intersect, and the supply flow path gap formed between the valve and the valve seat has a plurality of uneven portions each having a chevron-shaped cross section. 1. A high-pressure homogenizing machine characterized by being configured so that cavitation of liquid is performed in this mountain-shaped portion.