JPH0538308Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) This invention relates to a jacketed valve device.

(Conventional technology) Polymer chemistry, textile chemistry, food chemistry, fermentation chemistry,
In fields such as petrochemistry, many vessels and tanks are used to handle, react, stir, and store slurry liquids and high viscosity fluids. When taking out fluid from the inside of these vessels, tanks, etc., it is common to use a valve provided at the bottom.

Some of these fluids have extremely poor fluidity at room temperature, so it is common practice to set only the valve at a high temperature to make it easier to take out the fluid.

Alternatively, there are systems in which the tank or tank itself is configured to heat itself for the purpose of heating reactions and heating agitation, but even in this case, the valve is set at a high temperature to prevent cooling when the fluid passes through the valve. things are being done.

In order to set the valve to a high temperature in this way, the conventional method is to provide a jacket on the valve body, through which steam or high-temperature heat transfer oil sent from a boiler etc. via piping is passed. The valve is then heated.

However, as a practical matter, even if fluid is not removed very often by opening and closing valves, the boiler described above must be kept in operation at all times and must be on standby to open and close the valves whenever necessary. Therefore, there is a drawback that fuel costs and electricity costs for operating the boiler are continuously consumed. In addition, losses due to heat radiation from the piping from the boiler to the valve will also be added.

In order to avoid such losses, the boiler can be shut down from the moment the valve is closed until the next time it is opened. It is extremely troublesome because it is necessary to return the heat transfer oil, boiler, piping, etc. to a predetermined temperature before restarting the use of the valve. Moreover, the energy required for this is consumed each time the valve is opened and closed.

(Problems that the invention aims to solve) This invention makes it possible to heat the valve body by consuming only the minimum necessary thermal energy, and also makes it possible to heat the valve body efficiently and at a uniform temperature. The purpose is to

(Means for solving the problem) This idea provides a jacket chamber in the valve body,
By enclosing a gas-liquid two-phase heat medium here and heating this heat medium with an external heat source,
The valve body is heated by latent heat due to evaporation and vaporization of the heat medium, thereby heating the fluid passing through the valve.

(Example) An example of this invention will be described with reference to the drawings. Reference numeral 1 denotes a valve body, which is provided with a fluid passage 2 inside. 3 is a stem, which is used to attach to the bottom of the tank containing the fluid. 4
5 is a valve that opens and closes the inlet of the passage 2, and 5 is the outlet of the passage 2.

Reference numeral 6 denotes a rod for opening and closing the valve 4. The valve 4 is fixed to the tip of the rod, and a handle 7 is fixed to the lower end by a nut 8. A threaded portion 11 of a fixed sleeve 10 is screwed into the threaded portion 9 of the rod 6. Therefore, handle 7
By rotating the rod 6, the rod 6 moves up and down with respect to the sleeve 10. The valve 4 is opened and closed by this lifting and lowering.

The above configuration is not particularly different from conventional valves of this type. According to this idea, the valve body 1
A jacket compartment 14 is provided in the jacket compartment. Specifically, aisle 2
A jacket chamber 14 is provided to surround the jacket. A gas-liquid two-phase heat medium 12 such as distilled water or organic oil is stored in the jacket chamber 14 in a sealed manner (or under reduced pressure as the case may be).
That is, a liquid reservoir 13 is provided at the bottom of the jacket chamber 14, and the heat medium 12 in the liquid phase is stored here.
Store it.

A heating device is provided for heating the liquid phase heat medium 12 to evaporate it. This is constituted by an electric heater or an electromagnetic induction heating device.
The illustrated example shows a configuration using an electromagnetic induction heating device 15, in which an electromagnetic coil 16 is installed so as to surround the liquid reservoir 13, and is excited by an AC power source.

If the wall surface of the liquid reservoir section 13 is made of a conductive material, when the electromagnetic coil 16 is excited by an AC power source, the AC power source induces the wall surface of the liquid reservoir section 13 to generate heat. The heat medium 12 is heated by this heat.

When the heating device is an electric heater, the liquid reservoir 13 is heated by the heat, and the heat medium 12 is heated based on the heat.

When this valve is used to remove fluid from the tank, it heats the heat transfer medium 12 as described above. As a result, the heat transfer medium evaporates and evaporates, but when the vapor adheres to other walls of the jacket chamber 14 which are in a low temperature state, it liquefies there again.
At that time, latent heat is released, causing the temperature of the wall to rise. The heat medium liquefied and condensed as described above returns to the liquid reservoir 13.

By repeating this, the jacket compartment 14
The walls of the building are heated, but the temperature of all walls at that time increases equally. This temperature rise in the jacket chamber 14 causes the valve body 1 to be heated in a short time.

If the valve 4 is opened when the temperature of the valve body 1 has risen sufficiently as described above, the fluid in the tank can be cooled by the valve body 1 without losing its fluidity.
In this case, the electromagnetic induction heating device 15 needs to be driven only when it is necessary to take out the fluid.

(Effects of the invention) According to the invention detailed above, a gas-liquid two-phase heat medium is stored in the jacket chamber provided in the valve body, and this is heated by a heat source, so that the valve body It heats up quickly and
The temperature rises evenly throughout the entire body, which makes it possible to extract the fluid without impairing its fluidity, and the heating medium only needs to be heated when it is necessary to extract the fluid. Because of this, there is no need to run a boiler all the time like in the past, and since the only objects to be heated are the heat medium and the valve body, the thermal energy required to heat them is minimal. play.

[Brief explanation of drawings]

The figure is a sectional view showing an embodiment of this invention. 1... Valve body, 2... Passage, 4... Valve chamber,
12... Heat medium, 15... Heating device, 14... Jacket chamber.

Claims (1)

[Scope of utility model registration request] A jacket chamber is provided to surround the valve body, which has a fluid passage inside, and a gas-liquid two-phase heat medium is sealed in the jacket chamber, and the heat medium is heated to absorb latent heat due to its evaporation and vaporization. Accordingly, the jacketed valve device includes a heat source for heating the valve body provided in the jacket chamber.