JP2997911B2 - Manual valve operating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manual operation device for a valve, and more particularly to a lever-type manual operation device for preventing dew condensation used in a 90-degree rotation operation valve such as a butterfly valve or a ball valve.

[0002]

2. Description of the Related Art A lever-type manual operation device (lever handle) used for a butterfly valve or a ball valve itself performs a rotary motion about a stem, and therefore can be provided with a heat insulating coating for cooling insulation integrally with the valve. Can not. Therefore, when a low-temperature fluid flows through the valve, the temperature of the lever handle becomes low and the moisture in the atmosphere condenses, and the lever handle and the valve are rusted or contaminated, and the heat insulating coating applied to the valve for cooling. Or to reduce its effect.

[0003] In order to prevent this, a method of insulating between the stem and the lever handle may be adopted.
With this means, a part of the stem and the shaft mounting portion of the valve must be exposed to the atmosphere, and the problem of dew condensation cannot be reliably prevented (for example, JP-A-4-78381).
For this reason, a method has been used in which a gear operating device is used to insulate the valve and the valve together with a heat insulating cover to keep the stem from being exposed to the atmosphere. In addition, there is a risk of dew condensation on the steering wheel of this gear operating device.

[0004]

The problem to be solved by the present invention is that, as described above, the conventional lever-type manual operation device is condensed in spite of its excellent cost, installation space and operation. To solve the problem that it cannot be used for low-temperature fluids.

[0005]

Means for Solving the Problems In order to solve the above-mentioned problems, a manual operation device for a valve according to the present invention is constituted as follows. An outer peripheral surface of a core material having an L-shaped cross section is covered with a heat insulating member such as synthetic resin or rubber to constitute a lever handle having a boss at an end of a grip portion, and the boss of the heat insulating member is connected to an outer peripheral surface of a valve. Buried in the heat insulation coating layer for cooling insulation coated on the substrate. In this case, a fitting portion is provided at the end of the core material in the boss portion, the fitting portion is fixed to the outer end of the stem provided on the valve, and the boss portion of the heat insulating member covers the outer peripheral surface of the valve. An outer peripheral surface of a substantially L-shaped core portion formed by embedding in a coating layer or extending an outer end of a valve stem is covered with a heat insulating member such as a synthetic resin or rubber. The boss surrounding the stem portion is provided so as to be embedded in the heat insulating coating layer for cooling the valve. Further, it is preferable to mount a cylindrical collar on the outer periphery of the boss portion via a seal ring.

As another means, a lever handle having an L-shaped cross section having a boss portion and a grip portion is formed of a heat insulating material such as synthetic resin or rubber, and a fitting portion is provided in the boss portion.
The fitting portion is fixed to the outer end of the stem provided on the valve, and the boss portion is embedded in a heat insulating coating layer for cooling which covers the outer peripheral surface of the valve. In this case, a cylindrical collar is attached to the outer periphery of the boss.
Is preferably mounted via a seal ring.

[0007]

Since the valve manual operating device of the present invention is constructed as described above, it is expensive, requires a large operating space, and requires a multi-rotation operation like the conventional gear operating device. Is not bothersome.

Next, in this lever-type manual operation device, the outer end of the stem is not exposed to the atmosphere, and has a sufficient thickness from the outer surface and is made of a material such as synthetic resin or rubber having a large heat insulating effect. Therefore, even if a low-temperature fluid flows through the valve, the temperature of the outer surface of the lever-type manual operation device becomes low and moisture in the atmosphere does not condense.

Further, when the lever-type manual operation device is connected to the stem, the boss portion enters into the cold insulation layer of the valve, so that the lower portion of the stem is inserted into the lever-type manual operation device. Is also not exposed to the atmosphere, and there is no condensation in this part.

The lever-type manual operation device may be formed by coating a metal material with a sufficient thickness of a synthetic resin, rubber, or the like, but the entire resin is made of a resin having a high strength and a large heat insulating effect. Even when formed, the dew condensation can be reliably prevented. In this case, when only the fitting portion is formed by fixing the metal bush, the strength is further improved. When the core material is coated, the core material may be formed integrally with the metal core material, or may be formed separately and bonded to the core material.

If a watertight structure is provided between the boss portion and the heat insulating coating layer for cooling the valve, even if water droplets fall on this portion for a reason other than dew condensation, the water droplets enter the heat insulating coating layer for cooling from this portion. Thus, the effect of reducing the effect does not occur.

In this watertight structure, a cylindrical collar into which a boss is inserted is fixed to the heat insulating coating layer for cooling, in a sealing manner.
When a structure is used in which the space between the boss portion and the boss portion is sealed in a water-tight state by a seal ring such as an O-ring attached to the inner diameter portion, the structure is simple, the handling is easy, and the sealing property is reliable.

[0013]

FIG. 1 is a longitudinal sectional view showing an embodiment of a manual operating device for a valve according to the present invention, wherein 1 is a lever handle having a substantially L-shaped cross section having a boss portion 1a and a grip portion 1c.
Reference numeral 2 denotes a metal core member separate from the stem 6a, 3 denotes a heat insulating member made of a synthetic resin or rubber having a sufficient thickness from the outer surface around the core material 2 and having a large heat insulating effect, and 4 denotes a lever handle. The collars 5 inserted into the boss 1a are seal rings (O-rings) mounted on the inner diameter 4a of the collar 4.

FIG. 1 shows a state in which the lever handle 1 is attached to the valve by using a two-dot chain line except for the lever handle 1. In the figure, 6 is a wafer type butterfly valve, 7 is a flange for holding the butterfly valve 6 (details such as bolt holes are omitted), 8 is a heat insulating coating layer for keeping the butterfly valve 6 and the flange 7 cool, and 9 is a heat insulating coating layer 8 It is a jacket that wraps around.

The lever handle 1 is connected to the stem 6 of the valve 6.
a has a fitting portion 1b to which the outer end 6b is inserted and connected. Further, the boss 1a of the lever handle 1 enters into the heat insulating coating layer 8 for keeping cold, and the boss 1a
Is fixed to the jacket 9 surrounding the heat insulating coating layer 8 for cooling by hermetically by brazing or connecting with an adhesive. Further, the inner diameter portion 4a of the collar-4
Seal ring (O-ring in the embodiment of FIG. 1)
5, the space between the collar-4 and the boss 1a is made watertight.

The lever handle 1 shown in FIG.
Since the upper flange 6c is attached to the valve 6 as shown in the figure, the boss 1a is formed in a size that covers the upper flange 6c.

FIG. 2 is a longitudinal sectional view showing another embodiment of the valve manual operation device according to the present invention. In this case, the valve 6 has no upper flange and the stem 6a is short.
As shown in FIG. 1, the boss 1a does not need to be particularly large and cup-shaped, but is a thin boss 1a. Therefore, the collar-4 into which the boss 1a is inserted is also a thin cylinder. Other configurations are the same as those in FIG.

FIG. 3 is a longitudinal sectional view showing still another embodiment of the valve manual operating device according to the present invention, which has the same shape as the lever handle 1 shown in FIG. It is made of a resin with a large heat insulating effect.

FIG. 4 is a longitudinal sectional view showing still another embodiment of the manual valve operating device according to the present invention. The metal bush 10 is fitted to the fitting portion 1b of the lever handle 1 shown in FIG.
Is formed by fixing. FIG. 5 is a longitudinal sectional view showing still another embodiment of the valve manual operating device according to the present invention, which has the same shape as the lever handle 1 in FIG. It is made of a large resin, and the portion of the fitting portion 1b is
Is fixed.

FIGS. 6 to 8 show another embodiment. FIG. 6 shows an example in which an upper flange 6c is provided, and FIG. 8 shows a case where there is no flange. 6a. Specifically, the outer end of the stem 6a of the valve 6 is integrally formed in a substantially L-shape to provide an L-shaped core member 2a, and the outer periphery of the L-shaped core member 2a has a sufficient thickness and heat insulation. A heat-insulating member such as a synthetic resin or rubber having a large effect is covered, and a boss portion 1a surrounding the stem portion of the heat-insulating member is embedded in the heat-insulating coating layer 8 for cooling the valve 6.

Next, the operation of each of the above embodiments will be described with reference to the drawings. First, since the lever handle 1 is a lever type, the cost is high like a gear operating device,
There is no need for a large operation space or troublesome operation due to the need for multi-turn operation.

Next, when the lever handle 1 is separate, the hole into which the outer end 6b of the stem 6a of the valve 6 is inserted is the fitting portion 1b, and the outer end 6b of the stem 6a is exposed to the atmosphere. Also, since a sufficient thickness from the outer surface is made of a material such as synthetic resin or rubber having a large heat insulating effect, even if a low-temperature fluid flows through the valve 6, the outer surface of the lever handle 1 Does not become cold and the moisture in the atmosphere does not condense. The same applies to the case where the L-shaped core member 2a is integrated with the stem 6.

Further, the lever handle 1 is connected to the stem 6a.
When the connection is made, the boss portion 1a penetrates into the cooling insulation layer 8 of the valve 6, so that the portion of the stem 6a below the portion inserted into the lever handle 1 is not exposed to the atmosphere. There is no condensation in this part.

The lever handle 1 is made of a metal core 2
May be formed by covering the heat insulating member 3 such as synthetic resin or rubber to a sufficient thickness. However, even if the whole is formed of synthetic resin or the like having high strength and large heat insulating effect, there is an effect of preventing dew condensation. .
In this case, only the portion of the fitting portion 1b is connected to the metal bush 10
Is fixed, the strength is improved and it is hard to break. In the case of coating, it may be formed integrally with a metal core material, or may be formed by bonding a separately formed product, or the like, and these are optional depending on the implementation.

If a water-tight structure is provided between the boss 1a and the heat insulating coating layer 8 of the valve 6, even if water drops are applied to this portion for a reason other than dew condensation, the cooling insulating heat insulating coating layer 8 is formed from this portion. There is no possibility that water drops will enter the water and lower its cooling effect.

In this watertight structure, a cylindrical collar 4 into which the boss 1a is inserted is fixed to the heat insulating coating layer 8 for cooling by brazing or by an adhesive, and is sealed to the inner diameter portion 4a of the collar 4. When a structure is used in which the space between the boss portion 1a and the boss portion 1a is sealed in a water-tight state by a seal ring 5 such as an O-ring, the structure is simple, the handling is easy, and the sealing property is reliable.

[0027]

The valve manual operation device of the present invention completely prevents dew condensation from rusting the lever handle or valve, soiling the surroundings, or dampening the heat insulating insulation coating to reduce its effect. Never do. Further, the lever type has advantages such as low cost, small mounting space, and easy operation.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a valve manual operation device according to the present invention.

FIG. 2 is a longitudinal sectional view showing another embodiment of the manual valve operating device of the present invention.

FIG. 3 is a longitudinal sectional view showing another embodiment of the manual valve operating device of the present invention.

FIG. 4 is a longitudinal sectional view showing another embodiment of the lever handle in the manual valve operating device of the present invention.

FIG. 5 is a longitudinal sectional view showing another embodiment of the lever handle in the valve manual operation device of the present invention.

FIG. 6 is a longitudinal sectional view showing another example of the present invention.

FIG. 7 is an enlarged plan view of FIG. 6;

FIG. 8 is a longitudinal sectional view showing another example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lever handle 1a Boss part 1b Fitting part 1c Grip part 2 Core material 2a Core member 4 Collar 4a Inner diameter part 5 Seal ring (O-ring) 6 Butterfly valve 6a Stem 6b Outer end 8 Heat insulation coating layer 10 Metal bush

Claims (6)

(57) [Claims] 1. A lever handle having a boss portion at an end of a grip portion by covering an outer peripheral surface of a core material having an L-shaped cross section with a heat insulating member such as synthetic resin or rubber, and a boss portion of the heat insulating member. Is embedded in a heat insulating coating layer for cooling which covers the outer peripheral surface of the valve. 2. A fitting portion is provided at an end of the core material in the boss portion, and the fitting portion is fixed to an outer end of a stem provided on the valve, and a boss portion of the heat insulating member is provided on an outer peripheral surface of the valve. 2. The valve manual operating device according to claim 1, wherein the valve is buried in the coated heat insulating coating layer for cooling. 3. An outer peripheral surface of a substantially L-shaped core member formed by extending an outer end of a stem of the valve is covered with a heat insulating member such as synthetic resin or rubber. 3. The valve manual operating device according to claim 1, wherein the boss surrounding the stem portion is embedded in the heat insulating coating layer for cooling the valve. 4. A cylindrical collar around the outer periphery of the boss.
4. The valve manual operating device according to claim 1, wherein the valve is mounted via a seal ring. 5. A lever handle having an L-shaped cross section having a boss portion and a grip portion is formed of a heat insulating material such as synthetic resin or rubber, and a fitting portion is provided in the boss portion, and the fitting portion is attached to a valve. A manual operating device for a valve, wherein the boss is fixed to an outer end of a stem provided and the boss portion is embedded in a heat insulating coating layer for cooling which covers an outer peripheral surface of the valve. 6. A cylindrical collar on the outer periphery of the boss.
The valve manual operation device according to claim 5, wherein the device is mounted via a seal ring.