JP320I - Air pot safety valve device - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a safety valve device for an air pot, and in particular to a safety valve device for an air pot in which the water lift pipe is directly fitted to the shoulder body. [Prior Art] Since the water lift pipe of the air pot is connected to the water injection pipe,
In the event of a fall, there is a risk of hot water leaking out of the pump pipe.
For this reason, in the past, a separate inner plug was provided for the pot lid,
The water lift pipe and water inlet pipe are connected via the inner plug, and a safety valve is installed inside the inner plug. However, with this configuration, the inner plug must always be attached and detached when filling or draining the pot, which causes the problem that the operation is time-consuming when filling or draining. In order to solve this problem, a connecting part is provided on the pot shoulder, and the water lift pipe is connected to one end and the water inlet pipe is connected to the other end, so that an air pot with a structure that omits the inner plug is conventionally known (Japanese Utility Model Publication No. 56-4324).
(See Japanese Patent Publication No. 5). In the above-mentioned known air pot, the water injection pipe is attached with an upward incline and a ball is installed inside it as a safety valve, so that when the pot is tipped over, the ball opens the water injection pipe to prevent hot water from leaking. [Problem to be solved by the device] In the above-mentioned known air pot safety valve device, the water injection pipe is inclined, and under normal conditions, the inclination moves the ball to the lower side of the water injection pipe to open the liquid passage. Therefore, even if the pot is simply tilted, water injection may be blocked, which causes inconvenience. Therefore, the object of this device is to provide a safety valve device with a structure that does not block water injection when the air pot is simply tilted, but can reliably block water injection when the pot is tipped over or tilted to a similar extent. [Means for solving the problems] In order to solve the above-mentioned problems, this invention provides a safety valve device which is interposed in the connecting part of the water injection pipe of an air pot, in which a pipe connecting part having inward and outward connecting ports at both ends is provided on the pot shoulder body, a water lifting pipe is connected to the inward connecting port, and a water injection pipe is connected to the outward connecting port, and a valve body having a required weight is housed in the valve box of the safety valve device,
An inlet hole is provided on the side of the valve box, which is connected to the outward connecting port of the pipe connecting part, a water inlet pipe is connected to a valve hole provided on the top surface of the valve box, and the valve body is placed facing the valve hole at a required distance below it. [Operation] When the air pot is in normal use, the valve body moves away from the valve hole to open it. When the air pot falls over or becomes tilted close to that, the valve body moves up to close the valve hole,
The water injection pipe is blocked. [Example] The air pot shown in Fig. 1 has a shoulder body 2 fixed to the upper end of a body 1, and the mouth of a middle bottle 3 inserted into the body 1 is pressed against the lower end of a cylindrical mouth 4 of the shoulder body 2 via a packing 5. A pipe connection part 6 is provided at the mouth 4 of the shoulder body 2. One end of the pipe connection part 6 is formed with a connection port 7 that opens on the inner peripheral surface of the mouth 4, and the other end is formed with a cylindrical connection port 8 that protrudes toward the outer periphery. A connection pipe 10 bent at a right angle is connected to the upper end of a water lifting pipe 9 inserted into the mouth of the middle bottle 3, and the connection pipe 10 is inserted into the one of the connection ports 7 while maintaining a watertight seal. A connection cylindrical part 12 of a valve box 11 is fitted into the other connection port 8, and the valve box 11 is placed on a support rib 13 of the shoulder body 2. The connecting cylinder 12 is integrally provided to protrude from an inlet hole 14 formed on the side of the valve box 11. A lid 15 is fitted to the top of the valve box 11, and a connecting cylinder 17 on the outlet side is integrally provided to protrude from a valve hole 16 formed in the center of the lid 15. The connecting cylinder 17 is bent at a right angle, and the water injection pipe 1 is attached to the tip of the connecting cylinder 17.
A pair of opposing guide ribs 19 are formed in the upper and lower directions inside the valve box 11 (see FIG. 2).
9, a positioning guide member 20 is fitted to the conical tube portion 22. The positioning guide member 20 is formed by integrally forming a conical tube portion 22 on the lower part of a cylindrical portion 21. The cylindrical portion 21 is formed with a notch 23 for water passage, and a pair of ears 24 are protruding to be fitted to the respective guy ribs 19. A rib 25 is formed on the inner surface of the conical tube portion 22. A valve body 26 having a required weight is housed inside the positioning guide member 20. The valve body 26 is formed in a conical shape whose lower half matches the taper of the conical tube portion 22. Therefore, in a normal state, the valve body 26 faces the valve hole 16 above with its center aligned with the conical tube portion 22, and opens it. In the figure, 27 denotes an air pump, 28 denotes a heat insulating member fixed to the lower surface of the lower plate, 29 denotes a packing, 31 denotes a lid, 32 denotes a valve body 26, 33 denotes a valve body 26, 34 denotes a valve body 26, 35 denotes a valve body 26, 36 denotes a valve body 26, 37 denotes a valve body 26, 38 denotes a valve body 26, 39 denotes a valve body 26, 40 denotes a valve body 26, 41 denotes a valve body 26, 42 denotes a valve body 26, 43 denotes a valve body 26, 44 denotes a valve body 26, 45 denotes a valve body 26, 46 denotes a valve body 26, 47 denotes a valve body 26, 48 denotes a valve body 26, 49 denotes a valve body 26, 50 denotes a valve body 26, 51 denotes a valve body 26, 52 denotes a valve body 26, 53 denotes a valve body 26, 54 denotes a
0 is a hinge for the lid 31. The heat insulating member 28 is provided with a water lift pipe 9.
The safety valve device for an air pot according to the embodiment of the invention is constructed as described above, and its operation will be described below. In the normal state, the valve body 26 opens the valve hole 16, so that when the air pump 27 is operated to increase the internal pressure of the inner bottle 3, hot water flows out through the water lift pipe 9, the connecting part 6, the inlet hole 14, the valve box 11, the valve hole 16 and the water injection pipe 18. In addition, if the air pot falls over and the valve body 26 comes into contact with the guide member 2, the
0, closing the valve hole 16 and preventing hot water leakage. When the lid 31 is opened to supply or drain water, the insulating member 28 rotates together with the lid 31, opening the mouth of the inner bottle 3. In this case, since a recess 32 is formed in the insulating member 28, interference with the rise pipe 9 is avoided. [Effects of the Invention] As described above, the safety valve device of this invention is an air pump in which the rise pipe and the water injection pipe are connected at the pipe connection part of the pot shoulder body, with a valve hole provided on the upper surface of a valve box provided on the water injection pipe,
A valve disc having a required weight is housed in the valve box facing the valve hole, so the valve hole will not be blocked even if the valve is slightly tilted from the normal position, and the valve remains stable.
However, if the valve tip over or approaches a tilt angle of overturning, the valve disc closes the valve hole, so leakage of molten metal can be reliably prevented. In addition, the above-mentioned safety valve device can be incorporated inside the shoulder body, which has the advantage of not increasing the overall volume of the pot. Furthermore, by providing an inlet hole on the side of the valve box and connecting the inlet hole to the connection port of the pipe connection part of the shoulder body, the structure can be made more compact than when an inlet hole is provided on the underside of the valve box.

[Brief explanation of the drawings] Fig. 1 is a partially omitted cross-sectional view of the embodiment, and Fig. 2 is an exploded perspective view of the safety valve device. 1...body, 2...shoulder, 3...bottle, 4...cylindrical mouth, 6...pipe connection, 7, 8...connection port, 9...water lift pipe, 10...connection pipe, 11...valve box, 14...inlet hole, 15...lid, 16...valve hole, 18...water injection pipe, 20...positioning guide member, 26...valve body.

Claims (1)

[Corrected specification] [Utility model registration claim] [Claim 1] A pipe connection part having inward and outward connection ports at both ends is provided on the pot shoulder body, a water lift pipe is connected to the inward connection port, and a water injection pipe is connected to the outward connection port. In this safety valve device which is interposed in the connection part of the water injection pipe of an air pot, a valve body having a required weight is housed in the valve box of the safety valve device, an inlet hole is provided on the side of the valve box, and the inlet hole is connected to the outward connection port of the pipe connection part,
A safety valve device for an air pot, characterized in that a water injection pipe is connected to a valve hole provided on the upper surface of a valve body, and the above-mentioned valve body is disposed below the valve hole and opposed thereto with a required distance.