Fluid handling – Systems – Sequentially progressive opening or closing of plural valves
Patent
1993-09-24
1995-02-21
Nilson, Robert G.
Fluid handling
Systems
Sequentially progressive opening or closing of plural valves
F16K 1116
Patent
active
053907035
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a valve for flowing liquid-phase media, especially for use in refrigerating plants or heating plants, respectively, based on the supply of refrigerated or heated liquid, respectively.
For the purpose of refrigerating or heating, respectively, a flowing liquid having a temperature adapted to the purpose in question is supplied to a refrigerating or heating plant, respectively. Usually, the liquid is supplied via a shunt valve adjusted by means of an electric motor.
A shunt valve assigned an adjusting electric motor represent an expensive solution, i.a. because the electric motor has to be equipped with a gear device for gearing-down, which means that one, in addition to the electric motor as such, must have a gear device or another transmission means. Likewise, such known plants require complex adjusting equipment for the purpose of supplying the necessary pulses to the electric motor regarding the valve.apprxeq.s degree of opening.
In prior art technique, one cannot use a ordinary thermostat to control said electric motor, because a thermostat only emits a on/off-signal.
Another disadvantage in normally used shunt valves is that the throttle means within the valve has to be adapted to every pipe dimension in order to achieve the correct valve characteristics.
Therefore, a main object of the present invention is to provide a substantially simplified and improved valve/regulator-assembly, i.e. a valve having an adjusting/closing device, wherein the valve may be controlled by means of a thermostat in combination with an electro magnet. This means that one, according to the invention, uses the most simple adjusting equipment known, namely a thermostat emitting an on/off-signal to an electro magnet effecting the actuation of the valve. This represents a very simple and inexpensive solution.
In accordance with the invention, said objects are realized in designing the valve such that it exhibits the features appearing from the following claims.
An example of a suitable embodiment is shown in the accompanying drawings, wherein:
FIGS. 1-3 show axial sections through the valve housing, illustrating the valve bodies in mutually differing positions,
FIG. 1 shows the valve in a closed position,
FIG. 2 shows the valve in a partly open intermediate position between closed and open position,
FIG. 3 shows the valve in an entirely open position; and
FIG. 4 shows a perforated valve seat plate having a central flow opening and peripheric flow openings for the liquid flowing through;
FIG. 5 shows an axial section corresponding to FIGS. 1-3 through a valve according to a somewhat modified embodiment wherein the longitudinal axis of the valve housing forms an angle in relation to the common axis of the inlet and the outlet. The spindle carrying the valve bodies and the valve seat form an acute angle in relation to the general flow direction of the liquid-phase medium. Otherwise, this embodiment is designed exactly according to the same principles as the embodiment of the preceding figures, and identical reference numerals have been used; the embodiment according to FIG. 5 should, therefore, not need to be further disclosed in the following.
In the various figures of the drawing, the general flowing direction of the liquid-phase medium has been indicated through arrow heads.
In order to explain the constructural features of the valve, reference is first made to FIGS. 1 and 4, the same features appearing from FIG. 5, showing an embodiment best suited to be mounted into a straight pipe line.
Reference numeral 1 denotes a valve housing having two tubular connecting pieces 1" and 1' for the valve's inlet and outlet, the axis of said inlet and that of said outlet--according to FIGS. 1-3--being positioned to cross each other perpendicularly; said axes coinciding according to FIG. 5. Thus, the directional extent of the inlet 1" in relation to the outlet 1' is not critical for the invention.
A sleeve-shaped housing portion 1"' establishes a guide for a valve spindle 2, coaxial to one tubular connecting pi
Covent AS
Hochberg D. Peter
Jaffe Michael
Kusner Mark
Nilson Robert G.
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