JPS6023634Y2 - pressure safety valve - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a pressure safety valve, and is designed to prevent the valve from freezing in winter.

(Conventional technology and problems) Conventional pressure safety valves are installed at appropriate locations on the piping connected to the ice chamber, so it is necessary to equip the valve or a part of the piping with an electric heater to prevent freezing in the winter. Therefore, increased costs and construction efforts were unavoidable.

Furthermore, if this type of equipment is not installed, if the pressure safety valve freezes during boiler operation, damage to the can body due to an abnormal rise in pressure within the water chamber is inevitable.

The one that tried to solve this problem was the Utsukko 48-1 shown in Figure 2.
There is a method shown in Publication No. 9165, but this requires a heat insulating material, and since the pressure safety valve A is inside the water heater B, when performing maintenance and inspection, the outer casing C and the heat insulating material must be removed. It was not something that could be done easily.

Further, the one disclosed in Japanese Utility Model Publication No. 47-22767 shown in FIG. 3 similarly requires a heat insulating material.

The object of the present invention is to eliminate the above-mentioned conventional drawbacks, eliminate the need for extra equipment such as an electric heater, prevent freezing, and allow for extremely easy maintenance and inspection of the pressure safety valve.

(Means for solving the problem) In order to achieve this objective, the present invention has the following configuration.

An opening is formed in the upper part of the can body consisting of a combustion chamber and an ice chamber, and a bottomed cylindrical body is provided in the opening, the bottom part of which is inserted into the water chamber, and the opening provided at the other end is arranged outside the boiler exterior, A pressure safety valve main body is disposed closely within the cylinder so as to be positioned at the insertion part of the cylinder into the water chamber, and the inlet of the pressure safety valve main body passes through the bottom of the cylinder and faces into the water chamber, and the outlet is located inside the cylinder. It faces the opening of the body.

(Function) The main body of the pressure safety valve is in close contact with the inner surface of the part of the cylindrical body inserted into the water chamber, so it is kept warm by the hot water in the water chamber and does not freeze.

In the case of maintenance and inspection, the main body of the pressure relief valve can be pulled out through an opening provided on the outside of the cylinder, or the cylinder can be pulled out of the can.

(Embodiment) To specifically explain an embodiment of the present invention with reference to the drawings, 1 is a can body consisting of a combustion chamber 2 and a water chamber 3, a burner 6 is arranged in the combustion chamber 2, and a water chamber 3. Water supply piping 4 and hot water outlet piping 5 have been constructed.

Reference numeral 7 designates an opening formed in the wall of the water chamber 3, and a bottomed cylindrical body 9 with a pressure safety valve main body 8 provided in close contact with the bottom inner surface is screwed into the open lower opening, and the bottom of the cylindrical body 9 is connected to the ice chamber 3. Inside, an opening 13 provided at the other end is arranged outside the boiler external device 5, which will be described later.

That is, the pressure safety valve main body 8 is located at a portion inserted into the water chamber 3 at the bottom of the cylindrical body 9.

An inlet 10 of the main body 8 passes through the bottom of the cylindrical body 9 and faces into the water chamber 3, and an outlet 11 faces an opening 13 of the cylindrical body 9.

Reference numeral 12 denotes a lid that surrounds the opening 13 of the cylindrical body 9 and includes a drain port 14.

15 is the boiler exterior.

Since this embodiment is configured as described above, the operation will be explained next. When the burner 6 is combusting and the boiler is operating (including during antifreeze operation at night), the pressure safety valve Since the main body 8 is always kept warm by the hot water in the water chamber 3 via the cylindrical body 9, it will not freeze even in winter or in extremely cold regions, and its functions will not be impaired.

Moreover, since the pressure safety valve main body 8 can be removed from the outside of the boiler external device 5 by simply separating the cylindrical body 9 from the wall of the water chamber 3, repairs and the like can be performed very easily.

If the pressure inside the water chamber 3 rises abnormally during use, the pressure safety valve main body 8 will operate to divert hot water flowing from the inlet 10 to the outlet 1.
1 and then drains from the drain port 14.

(Effects of the invention) As described above, the present invention forms an opening in the upper part of the can body consisting of a combustion chamber and an ice chamber, and the bottom part is inserted into the opening into the ice chamber.
A bottomed cylindrical body is provided with an opening provided at the other end placed outside the boiler exterior, and a pressure relief valve main body is provided in the cylindrical body in close contact with the main body of the cylindrical body so as to be located in the water chamber insertion portion of the cylindrical body. The main inlet of the safety valve passes through the bottom of the cylinder body and faces into the water chamber, and the outlet faces the opening of the cylinder body, so there is no need to install extra equipment such as an electric heater as in the past, and costs are reduced. Moreover, it can be easily constructed without raising the roof.

Furthermore, since the main body is reliably kept warm by the hot water in the ice chamber, it will not freeze during boiler operation, in winter, or in extremely cold regions, and damage to the can body can be prevented when the pressure in the water chamber increases abnormally due to freezing. .

Furthermore, maintenance and inspection of the pressure safety valve can be carried out extremely easily since the main body of the pressure safety valve can be easily removed from the outside of the boiler exterior.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention. FIGS. 2 and 3 are sectional views showing a conventional example. 1... Can body, 2... Combustion chamber, 3...
...Water chamber, 7...Opening, 8...Main body, 9...Cylinder, 10...Inlet, 11.
...Exit, 13...Opening, 15...
・Boiler exterior.

Claims (1)

[Scope of utility model registration request] An opening is formed in the upper part of the can body consisting of a combustion chamber and an ice chamber, and a bottomed cylindrical body is provided in the opening, the bottom part of which is inserted into the water chamber, and the opening provided at the other end arranged outside the boiler exterior. A pressure safety valve main body is disposed in the cylinder body in close contact with the cylinder body so as to be positioned in the water chamber insertion part, and an inlet of the pressure safety valve main body penetrates through the bottom of the cylinder body and faces into the water chamber, and an outlet is located in the cylinder body. A pressure safety valve characterized by facing the opening of the cylindrical body.