JPS633520Y2 - - Google Patents

Description

[Detailed description of the invention] This invention constantly supplies liquefied gas at a constant flow rate adjusted by a control valve to a vaporization tank equipped with a hot water tank.
The liquefied gas in the vaporization tank is heated and vaporized by the hot water tank, and the vaporized gas is sent from the vaporization tank outlet to the gas consumption mechanism via the gas supply pipe,
If the electric heater that heats the tank water in the hot water tank stops generating heat due to a power outage, or if the gas consumption of the gas consumption mechanism exceeds the gas vaporization capacity of the vaporizer, the liquefied gas will be released in the vaporization tank. In order to prevent the liquid level from rising and the liquefied gas flowing into the gas supply pipe as a liquid, the float valve body is floated by the rise in the liquid level at the liquefied gas village, and the valve port leading to the gas supply pipe is closed. It is an object of the present invention to enable such a known liquefied gas vaporizer to smoothly restart the delivery of vaporized gas without pressing down the float valve.

As shown in FIGS. 1 and 2, a conventionally known liquefied gas vaporizer is provided with a hot water tank 2 in which an electric heater 3 is inserted inside a protective cover 1 constituting a machine casing, and a tank is installed in the hot water tank 2. The vaporization tank 4, which is sealed except for the outlet pipe 5, is suspended and fixed with a protective cover,
A feed pipe 6 communicating with a liquefied gas injection valve 7 exposed on the upper side is inserted into these vaporization tanks 4 to near the bottom thereof with an airtight seal. The tank outlet pipe 5 formed in the form of a standpipe is attached to a flange 8a that protrudes above the machine housing and into which a gas supply pipe 8 is inserted, and a gas transfer pipe or hose for a gas consumption part is connected to the supply pipe 8. An outlet 9 is provided.
Only one vaporization tank 4 may be provided, or two or more vaporization tanks 4 may be provided as shown in the figure.

In the above, an outflow pipe of another vaporization tank (not shown) is connected to the injection valve 7, and a constant flow rate of liquefied gas adjusted by the valve handle 7a is constantly fed into the vaporization tank 4 through the supply pipe 6, and the liquefied gas is liquefied. The gas is heated and vaporized by tank water in a hot water tank 2 heated by an electric heater 3, and then is sent from a tank outlet pipe 5 through a gas supply pipe 8 to a gas consumption mechanism (not shown). be. Then vaporization tank 4
The liquid level W of the liquefied gas is suppressed by the tank gas pressure to suppress the amount of liquefied gas fed from the feed pipe 6, and the liquid level W depends on the gas consumption of the gas consumption mechanism. It moves up and down even when I touch it. However, when the electric heater 3 stops generating heat due to a power outage and the hot water temperature drops, the amount of vaporized gas in the vaporization tank 4 gradually decreases and the liquid level W decreases because the amount of vaporized gas sent to the gas consumption mechanism remains the same. rises. The same is true when the gas consumption amount of the gas consumption mechanism exceeds the vaporization capacity of the liquefied gas vaporizer, and the liquefied gas eventually overflows from the tank outlet pipe 5 into the gas supply pipe 8 while remaining as a liquid.

In order to eliminate this drawback, the valve seat 11 of the valve port pipe 10 communicating with the gas supply pipe 8 is exposed to the upper end of the tank outlet pipe 5, and the cylindrical body 1 is suspended at the center of the tank outlet pipe 5.
2 is provided with a float valve 13 facing the valve seat 11, and the lowering of the valve 13 is suppressed by a perforated plate 14,
As the liquefied gas level W rises, the float valve 13 is similarly raised by the liquid level W and is brought into pressure contact with the valve seat 11 to prevent the liquefied gas from flowing out.

However, the malfunction was repaired and the vaporized gas was transferred to the gas supply pipe 8.
Even if an attempt is made to send the fluid out again, the valve seat 11 remains blocked by the float valve 13, making it impossible to restart. For this reason, it is conventionally known to provide a pusher member directly above the valve seat 11 that pushes down the float valve 13 to forcibly open the valve seat 11. In this case, the pusher member is attached to the gas supply pipe. It is not easy to create a structure that protrudes to the outside of 8.
For example, since it is necessary to bend the gas supply pipe 8 horizontally just above the valve port pipe 10, there is a drawback that the existing general liquefied gas vaporizer as shown in FIGS. 1 and 2 must be modified.

The present invention makes it possible to effectively utilize the general liquefied gas vaporizer currently in use as illustrated in Figures 1 and 2 by only slightly modifying the flange 8a of the gas supply pipe 8. .

That is, the flange 8a has a bypass outflow hole 2 bent in a square shape just above the valve port pipe 10.
1, both ends of the hole 21 communicate with the gas supply pipe 8 and the inner space of the tank outlet pipe 5, and a valve insertion hole 2 whose inner diameter is expanded into the vertical portion 22 of the bypass outflow hole 21.
3, and a bypass valve port 24 whose inner diameter is reduced at the lower end of the hole 23 where it communicates with the tank outlet pipe 5. An extension hole 25 is formed.

26 is a flange 8a at the upper end of the extension hole 25.
It is a valve support cylinder attached by welding or the like to the valve support cylinder, and a screw 27 is provided from the inner circumference to the inner circumference of the extension hole 25, and an external thread 28 is also formed on the outer circumference. 29 is a threaded valve that is screwed into the valve support cylinder 26 and the screw 27 of the extension hole 25 so that the bypass valve 30 at the tip faces above the bypass valve port 24; will be established. 32 is a cup-shaped protective sheathing tube that is screwed onto the outer thread 28 and placed over the threaded valve 29;
3 will be provided. The knob 31 can also be formed in the same cup shape as the protective cladding tube 32. In this case, the outer circumferential screw 28 is unnecessary.

In the liquefied gas vaporizer, if a failure occurs as described above and the float valve 13 comes into pressure contact with the valve seat 11 to prevent the liquefied gas from flowing out, the supply of the liquefied gas will naturally be interrupted and the vaporized gas will be released unexpectedly. The gas valve in the gas supply pipe 8 is kept closed to prevent an accidental inspection when the gas is supplied. Therefore, even if the supply of vaporized gas is resumed, raw gas will not be supplied to the consumption mechanism unless the center hole of the valve seat 11 is opened.

In the present invention, when a failure occurs in the liquefied gas vaporizer and the valve seat 11 is closed by the float valve 13, it is possible to carry out a process to recover the failure through inspection, or even if the process is completed, the float valve 13 closes the valve seat 11. No vaporized gas is supplied to the supply pipe 8. Therefore, at this time, the threaded valve 29 is screwed upward using the knob 31, and the bypass valve 30, which has closed the bypass valve port 24, is raised to open the valve port 24, as shown in the figure. At this time, the vaporized gas above the liquid level W of the tank outlet pipe flows out from the bypass outflow hole 21 to the gas supply pipe 8, increasing the gas pressure in the gas supply pipe 8. At that time, the liquid level in the tank outlet pipe 5 will naturally drop for inspection, but even if it does not drop, it will drop somewhat due to gas vaporization, so the float valve 13 Since the float valve 13 is supported only by the gas pressure inside the tank and is in pressure contact with the valve seat 11, when the internal gas pressure of the gas supply pipe 8 rises to be in equilibrium with the gas pressure inside the tank outlet pipe 5, the float valve 13 is The supporting pressure becomes zero, and the valve 13 falls due to its own weight and restarts the gas supply.

Immediately after restarting, there is no need to press the bypass valve 30, which is a threaded valve, against the bypass valve port 24 to lose the function of the bypass outflow hole, and the bypass valve 30 can be applied at an appropriate time after restarting.

As clarified from the above description, in the present invention, the bypass outflow hole 21 and the threaded valve 29 are screwed together on the flange 8a of the gas supply pipe 8, and the flange 8a and the gas supply pipe 8 are connected by screws. are usually joined during assembly. Since the main parts of the present invention are provided on the flange 8a, it is easy to replace the flange in a conventionally used liquefied gas vaporizer with the one of the present invention, making it possible to make new products and improve old structures. This is very simple and has the excellent effect of restarting the supply of vaporized gas very naturally without forcing the float valve 13 down.

[Brief explanation of the drawing]

The accompanying drawings show an embodiment of the present invention, with FIG. 1 being a side view, FIG. 2 being a vertical front view, and FIG. 3 being an enlarged sectional view of the main parts. 2... Hot water tank, 3... Electric heater, 4... Vaporization tank, 5... Tank outlet pipe, 6... Feeding pipe, 8
... Gas supply pipe, 8a ... Flange, 10 ... Valve port pipe, 11 ... Valve seat, 13 ... Float piece, 21
... Bypass outflow hole, 22 ... Vertical part, 23 ...
Valve insertion hole, 24... Bypass valve port, 29... Threaded valve, 30... Bypass valve. 31...knob

Claims (1)

[Scope of utility model registration request] A gas supply pipe in which liquefied gas is supplied to a vaporization tank provided with a hot water tank, the liquefied gas in the vaporization tank is heated and vaporized by the hot water tank, and the vaporized gas is transferred from an outlet pipe of the vaporization tank to a flange attached to the outlet pipe. At the same time, a valve port pipe is connected to the outlet pipe of the vaporization tank, and the liquefied gas floats up as the liquid level in the vaporization tank rises, making it possible to press and seal the valve port pipe to the valve port. In a liquefied gas vaporizer equipped with a float valve, a square-shaped bypass outlet is provided in the flange above the valve port of the valve port pipe and communicates with the inner space of the vaporization tank, and a knob is provided on the outside of the flange. and a threaded valve screwed onto the flange is faced to the vertical part of the bypass outflow hole, and the tip of the threaded valve is brought into contact with and separated from the vertical part by turning the screw with the knob to close the valve. A vaporized gas supply restart device for a liquefied gas vaporizer, characterized in that it is provided with a bypass valve opening that causes the valve to open.