JPS582940Y2 - Gas or steam regulating valve - Google Patents

Description

[Detailed Description of the Invention] This invention relates to the structure of a gas or distillation rho regulating valve.

Conventionally, two or three circular partition plates with fan-shaped slits cut in the radial direction of a duct with a circular cross section are stacked one on top of the other, and one or two of these are rotated to separate gas or steam. Regulating valve devices for regulating the flow rate are already known.

For example, the "Gas or Steam Consumption Control Device" in Japanese Patent Publication No. 47-43369 is similar to this.
To briefly explain the simplest structure of the conventional device with the help of drawings, Fig. 1 shows a cross section of the blade rows of the governor valve, and Fig. 2 shows a fixed valve having radially arranged blade rows. This is a partition plate, and 1 is a movable partition plate having a corresponding blade row.

The moving direction of the movable partition plate 1 is only rotational movement about the axis.

In addition, the cross-sectional shape of the blades on each partition plate is such that when the blades on the fixed partition plate and the blades on the movable partition plate are lined up in the same phase, the overall shape formed by the cross sections of both blades is a streamline shape. Therefore, as shown in Figure 1, the fluid flowing between the blades passes most smoothly and with the least resistance in this state when the valve is fully open. Fig. 2 shows the arrangement relationship when the movable partition plate 1 is rotated to realize the half-open state, but at this time, the wings of the leader-controlling partition plate 2 and the wings of the movable partition plate 1 are are shifted from each other, and the shape of the flow path formed between them becomes extremely uneven, which has the disadvantage that large turbulence occurs in the flowing fluid and increases pressure loss.

This invention eliminates the drawbacks of these conventional devices,
The purpose is to provide a gas or steam regulating valve that can keep the resistance of flowing fluid to a minimum throughout the entire range from fully open to fully open with a simple configuration. A fixed partition plate 2 having a row of blades formed by arranging a large number of shaped blades at regular intervals.
And what about the wings mentioned above! It is composed of a movable partition plate 1 having a blade row consisting of a large number of blades having the same cross-sectional shape and arranged so as to be located between the blades of the blade row of the fixed partition plate 2. A means for adjusting the distance in the front-rear direction between the partition plate 2 and the movable partition plate 1 is provided, and by moving the movable partition plate 1 in a direction that reduces the distance in the front-rear force direction, the wings of the fixed partition plate can be adjusted. The gap formed between the blades of the movable partition plate and the respective gas or steam passages is uniformly adjusted until it reaches a minimum value of zero.

The configuration of the regulating valve according to this invention will be specifically explained below based on drawings showing embodiments.

In Figs. 3, 4, and 5, reference numeral 2 denotes a fixed partition plate that is fixed inside the duct, and as shown in Figs. It has a row of blades arranged radially at intervals.

Reference numeral 1 designates a movable partition plate, which includes a large number of blades having the same cross-sectional shape as the blades of the fixed partition plate 2 and arranged so that the blades are located between the blades of the blade rows of the fixed partition plate 2. It has a row of blades.

In order to maintain such a related aspect of the cutting plates of both companies, the movable partition plate 1 is configured so that it cannot rotate, and is configured to be movable in the front-rear direction, that is, in the axial direction.

An example of means provided for imparting the above-mentioned back-and-forth movement to the movable partition plate 1 is shown in FIGS. 3 and 4.

The illustrated example shows an example in which the central shaft to which the movable partition plate IVc is fixed is inserted through the fixed partition plate 2 in a state in which it can freely slide in the front and rear directions but cannot rotate.

The means for forcing sliding in the longitudinal direction with respect to the axis is as follows:
Application of known means (not shown), such as providing a function as a fluid ram such as a hydraulic piston, or applying a mechanical linkage mechanism 7! J is possible.

The states shown in FIG. 3 and FIG. 6 are both states when the regulating valve is fully opened, and the flow of fluid passing through the valve at this time is as indicated by the arrow in the figure. It flows smoothly and with extremely little resistance along the streamlined airfoils located front and rear.

In addition, the state shown in FIG. 4 and FIG. 1 is the state when the regulating valve is almost fully closed, and of course, in this state, the distance between the cutting plates 1 and 2 in the front and back direction is adjusted. This is brought about by the means provided for the purpose of It is evenly adjusted with 1 being zero as the minimum value.

Moreover, during the transition from the fully open state to the fully open state, the fluid passage formed between the blades is always in a smooth state.
It is in a state of extremely little resistance, that is, a state of little pressure loss.

In the above embodiment, the movable partition plate 1 is arranged on the upstream side of the fluid, and the fixed partition plate 2 is arranged on the downstream side. is also possible, and this does not result in any difference in purpose or effect.

Since the gas or steam regulating valve according to this invention is constructed as described above, the resistance of the fluid flowing through the valve can be kept to a minimum through the entire range from fully open to fully open with a simple construction. This has the excellent effect of always minimizing the pressure loss of the flowing fluid.

In addition, in the embodiment described above, the case of a regulating valve provided in a circular duct was selected and explained, but almost the same effect can be obtained with a configuration similar to the above with a regulator having a rectangular cross section. It should be obvious that there is no need to explain it.

In this case, it is better to arrange the blades in a parallel arrangement rather than in a radial arrangement.

[Brief explanation of the drawing]

Figures 1 and 2 are cross-sectional views of a blade row in different operating modes of a conventional governor valve, and Figures 3 and 4 are cross-sectional views of a governor valve according to the present invention in different operating modes. A longitudinal sectional view of the embodiment, FIG. 5 is similar to FIG. 3 1 or 4.
FIG. 6 is a cross-sectional view of the blade row taken along line B-B in FIG. 5 in relation to the operating mode shown in FIG. 3. FIG. FIG. 5 is a cross-sectional view of the blade row q section taken along the line B-B in the middle, showing the operating mode shown in FIG. 4; 1...Movable partition plate, 2...Fixed partition plate.

Claims (1)

[Scope of utility model registration request] A fixed partition plate 2 has a row of blades made up of a large number of blades with a streamlined cross-sectional shape arranged at regular intervals; A movable partition plate 1 has a blade row consisting of a large number of blades arranged so as to be located between the blades of two blade rows. A means for adjusting the distance is provided, and by moving the movable partition plate 1 in a direction that reduces the distance in the front-rear direction, each of the wings formed between the wings of the fixed partition plate and the wing of the movable partition plate is A gas or steam regulating valve characterized in that the gap as a passage for gas or steam is uniformly adjusted by a groove whose minimum value is zero.