JPH0791563A - Non-penetrating remote valve - Google Patents

Abstract

PURPOSE:To eliminate an operating seal portion and prevent inside fluid from leaking outward of an outside casing by providing a movable mechanism inside of a vacuum heat insulating layer, and driving the movable mechanism by a fluid pressure to be supplied from the outside of the vacuum heat insulating layer or non-contact force such as a current or a voltage. CONSTITUTION:A remote valve using a fluid pressure is provided with a vacuum heat insulating layer 13 defined by an outside casing 11 and an inside casing 12. A cylinder 17 is housed inside of the vacuum heat insulating layer 13. A pipeline 16 for supplying and discharging helium is connected to the cylinder 17. A piston 18 fitted to the cylinder 17 is driven so as to open or close a valve body 15 disposed integrally with the piston 18 via a valve rod 14. An electric wire or non-contact force such as magnetic force outside of the vacuum heat insulating layer 13 may be used in driving the valve body 15. Otherwise, the valve rod 14 may be such constituted as to be driven via an operating force transmitting path by an operating mechanism outside of the vacuum heat insulating layer 13 only during operation of the valve.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid hydrogen valve and other cryogenic fluid valves.

[0002]

2. Description of the Related Art In a conventional cryogenic valve, a portion of a valve rod that comes into contact with a cryogenic fluid and a portion that comes into contact with outside air are materially continuous, and heat loss occurs due to heat conduction.

FIG. 5 shows a vertical sectional view of a conventional liquid hydrogen valve. The space between the outer casing 1 and the inner casing 2 of the valve is kept vacuum to perform a vacuum heat insulation method, and the valve body valve rod portion 5 is driven by the operation handle 4.

The inside 6 of the valve rod is hollow and has a length to prevent heat from entering from the outside. Reference numeral 7 is a valve body, 8 is a casing lid, 9 is a liquid contact portion, and 10 is a seal portion for sealing the valve body valve rod portion 5 and the casing lid 8.

[0005]

When the diameter of the liquid hydrogen valve is increased, in the conventional structure, (1) the valve rod itself becomes large and heat invasion due to conduction cannot be avoided. (2) If air leaks from the seal part 10 to the liquid contact part 9, it freezes and malfunctions. (3) The valve rod length is long, and the height is high when the diameter is increased, which is a disadvantage for installation.

(4) As an actual plant, we want to minimize heat loss. (5) I want to prevent the internal fluid from flowing out. Since the current parts of the liquid contact part (5, 7) continue to the room temperature part (4) as they are, heat loss and fluid leakage are essentially unavoidable. There was a problem such as.

[0007]

The present invention has solved the above-mentioned conventional problems. According to claim 1, (1) the valve having a vacuum heat insulating layer provided with a movable mechanism inside the vacuum heat insulating layer. (2) The valve rod or the power transmission shaft itself is driven inside the vacuum insulation layer by using a non-contact force such as a pipe or an electric wire for supplying fluid pressure from the outside of the vacuum insulation layer, or a magnetic force. Connect the inside and outside of the heat insulating layer so that it does not penetrate the vacuum heat insulating layer.

According to claim 2, (1) in the vacuum section, the valve rod or the power transmission shaft operates the external mechanism and the internal mechanism of the vacuum heat insulating layer only when the valve is operated by operating the vacuum heat insulating layer outside. By connecting the force transmission paths to transmit and separate operating forces such as torque and axial force, a mechanism is provided to prevent heat from entering due to heat conduction from the valve rod or power transmission shaft. . And so on.

[0009]

According to the first aspect of the present invention, (1) When a magnetic force is applied, there is no part where the vacuum heat insulating layer cannot be formed due to power transmission. (2) When fluid pressure or current / voltage is used, pipes and conductive paths with a small cross-sectional area pass through the vacuum heat insulating layer to supply power, so the entry path of heat from outside and thermal resistance can be set freely. it can.

According to the second aspect, (1) the vacuum heat insulating layer is penetrated only when necessary to transmit the drive torque, and when the drive torque is not transmitted, the vacuum heat insulating layer is formed separately. Etc. can be obtained.

[0011]

1 to 3 show an embodiment of claim 1 and FIG. 4 of the present invention.

FIG. 1 shows a case where fluid pressure is used, 11 is an outer casing, 12 is an inner casing, 13 is a vacuum heat insulating layer, 14 is a valve rod, and 15 is a valve body. The pipe 16 for supplying and discharging the helium gas, the cylinder 17, and the piston 18 constitute a movable mechanism in the vacuum heat insulating layer 13, whereby the valve body 1
5 is driven, and the movable mechanism does not penetrate the outer casing 11.

FIG. 2 shows a case where current and voltage are used, 21 is an outer casing, 22 is an inner casing, 23 is a vacuum heat insulating layer, and 24 is a valve body. Reference numeral 25 is a power supply line, 26 is an electric motor, and 27 is a gear device. The valve body 24 is driven by the power supply line 25 to rotate the electric motor 26 and is driven via the gear device 27 so that these movable mechanisms do not penetrate the outer casing 21. Has become.

FIG. 3 shows a case where magnetic force is used, 31 is an outer casing, 32 is an inner casing, 33 is a vacuum heat insulating layer,
Reference numeral 34 is a valve body. 35 is a power feeding body, 36 is a stator, 37
Is a rotor, and 38 is a gear device. The rotor 37 in the vacuum heat insulating layer 33 is rotated by the stator 36 provided outside, the valve body 34 is driven through the gear device 38, and the rotor 37, the gear A movable mechanism such as the device 38 does not penetrate the outer casing 31.

FIG. 4 shows the case of claim 2, wherein 41 is an outer casing, 42 is an inner casing, 43 is a vacuum heat insulating layer, 4
Reference numeral 4 is a valve body. Reference numeral 45 is an operation handle, and 46 is a shaft attached to the operation handle 45. The shaft 46 penetrates the outer casing 41 to reach the vacuum heat insulating layer 43, and is attached so as to be axially movable and rotatable. 47 is a component fixed to the tip of the shaft 46 and having a recessed portion at the bottom, 48 is a gear device,
Reference numeral 49 is a component that is attached to the gear device 48 and has a convex portion on the upper part. The components 47 and 49 form a clutch, and only when the valve element 44 is driven, the operating handle 45 is pushed to connect the clutch, Valve body 44 through 48
To rotate. That is, only at this time, heat is introduced due to heat transfer of the valve element 44.

[0016]

EFFECTS OF THE INVENTION According to the present invention, (1) the valve can be made compact by providing the effect of heat insulation without lengthening the valve rod. (2) According to the first aspect, since there is no motion seal portion, it is possible to prevent leakage of the internal fluid to the outside of the outer casing, and enhance safety. (3) According to claim 2, the heat loss from the drive shaft can be limited only when the valve is operated. Technical effects such as the above can be obtained, and concomitantly with these effects, there is an economic effect that a valve with a small heat loss can be supplied with a simple structure.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view according to an embodiment using fluid pressure of the present invention.

FIG. 2 is a vertical sectional view of an embodiment using current and voltage.

FIG. 3 is a vertical cross-sectional view of an embodiment using magnetic force.

FIG. 4 is a vertical sectional view according to an embodiment of claim 2;

FIG. 5 is a vertical sectional view showing a conventional liquid hydrogen valve.

[Explanation of symbols]

 11, 21, 31, 41 Outer casing 12, 22, 32, 42 Inner casing 13, 23, 33, 43 Vacuum heat insulating layer 14 Valve rod 15, 24, 34, 44 Valve body 16 Piping 17 Cylinder 18 Piston 25, 35 Supply Electric wires 26, 38, 48 Electric motor 27 Gear device 36 Stator 37 Rotor 45 Operation handle 46 Shaft 47 Parts 49 Parts

Claims (2)

[Claims] 1. A vacuum heat insulating layer, wherein a movable mechanism is provided inside the vacuum heat insulating layer, and the movable mechanism supplies a fluid pressure or current / voltage supplied from the outside of the vacuum heat insulating layer or a magnetic force or the like. A non-penetrating remote valve, wherein the non-penetrating remote valve is driven inside the vacuum heat insulating layer by a contact force. 2. A structure having a vacuum heat insulating layer, wherein the operation force transmission path between the external mechanism and the internal mechanism of the vacuum heat insulating layer of the valve can be separated and coupled in the vacuum section by an operation outside the vacuum heat insulating layer. A non-penetrating remote valve characterized in that