JPH01307697A - Water sealing and making up device for drain hub - Google Patents

Abstract

PURPOSE:To shorten the time of the operation for inspecting a water sealing type drain hub and water sealing and making up by automatically making up sealing water only by as much as the water in the drain hub decreased on evaporation. CONSTITUTION:A stop valve 8 of a vent pipe 4 and a stop valve 9 of a makeup water inlet pipe 5 are held closed and only the stop valve 7 of a sealing water injecting pipe 7 opens at the time of automatically making up the water in the normal time. The makeup water in a makeup water tank 2 flows into the floor drain hub 1 from the sealing water injecting pipe 3 when the sealing water in the floor drain hub 1 evaporates and decreases until the bottom end of the injecting pipe 3 is exposed in the air space. The air flows into the makeup water tank 2 from the bottom end of the injecting pipe 3 at this time. The makeup water from the tank 2 is stopped by the atmospheric pressure exerted to the sealing water part in the drain hub 1 when the sealing water in the drain hub 1 arrives at the bottom end of the injecting pipe 3. The automatic make up to the drain hub 1 is executed in this state.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention prevents the water seal from breaking at the drain port of the water system piping installed in a building installed in a nuclear power plant, and prevents the seal water from evaporating and reducing the amount of water from the drain port. This invention relates to a water-sealing replenishment device that automatically replenishes water.

[Conventional technology]

There is no way to automatically replenish water when the drain seal breaks, and the only way is for one person to inspect and replenish the water.

[Problem to be solved by the invention]

The conventional technology described above is a method in which a person inspects the drain port and replenishes the water seal if the water seal has decreased.

Inspecting a large number of drain ports takes a huge amount of time, and inspecting drain ports installed in high-dose areas requires excessive radiation exposure, which is a fatal drawback of drain ports. Ta.

SUMMARY OF THE INVENTION An object of the present invention is to provide a sealing water replenishing device that automatically replenishes only the evaporated amount of sealing water, which is reduced due to evaporation.

[Means to solve the problem]

The above object is achieved by timely and automatically replenishing the amount of sealed water in the drain port that has decreased due to evaporation.

[Effect]

In order to automatically replenish the water seal, we used the relationship between atmospheric pressure and the water column to automatically replenish the water seal through natural phenomena.

〔Example〕

Hereinafter, one embodiment of the present invention will be explained with reference to FIG.
indicates the floor drain socket currently in use.

2 is a make-up water tank that temporarily stores make-up water for sealing. This supplementary water tank includes a water seal injection pipe, 3° vent pipe, and 4.
Make-up water inlet pipe5. A level gauge 6 is connected. A stop valve 7 is provided on the water seal injection pipe 3, and a stop valve 8 is provided on the vent pipe 4. A stop valve 9 is installed in the makeup water inlet pipe 5. Water seal injection pipe 3
The upper end is connected to the bottom of the make-up water tank 2, and the lower end enters the water sealing part in the floor drain socket 1 to some extent.

The lower end of the vent pipe 4 is connected to the upper part of the make-up water tank 2, and the other end is open to the atmosphere. The make-up water inlet pipe 6 has one end connected to the make-up water tank 2, and the other end connected to the main pipe of the make-up water piping. It is assumed that the level gauge 6 can constantly monitor the water level of the makeup water tank 2.

Next, the operation of the present invention will be explained. First, when this device is installed, the water seal in the floor drain receiver [11] is empty. Also, the makeup water tank 2 is also empty, so water will first be poured into the makeup water tank 2. To inject water into the make-up water tank 2, first, the stop valve 7 of the water seal injection pipe 3 is closed, and the stop valve 8 of the vent pipe 4 is opened. Next, by opening the stop valve 9 of the make-up water population pipe 5, make-up water enters the make-up water tank 2 from the make-up water main pipe through the make-up water inlet pipe 5. The amount of water in the makeup water tank 2 is monitored with a level gauge 6,
When the level reaches the high position, the stop valve 9 of the makeup water inlet pipe 5 is closed. Next, the stop valve 8 of the vent valve 4 is closed. This completes filling water into the make-up water tank 2.

Next, seal water is poured into the floor drain socket 1. For water injection, the stop valve 7 of the water seal injection pipe 3 is opened. Since the water seal in the floor drain socket 1 is empty, the lower end of the water seal injection pipe 3 is in the air, and the makeup water in the make-up water tank 2 flows from the water seal injection pipe 3 into the floor drain socket. Enter the mouth. If the makeup water enters the floor drain socket 1 in this state and reaches the bottom end of the sealed water injection pipe 3, the makeup water will naturally flow from the makeup water tank 2 due to the atmospheric pressure applied to the water seal inside the floor drain socket 1. Stop.

In this state, water injection into the floor drain port 1 is completed, and the floor drain port 1 is sealed with water and satisfies its function.

Next, a case will be described in which the sealed water in the floor drain port 1 evaporates and the sealed water is automatically replenished. First, the opening and closing of the drain is the same as when water is poured into the floor drain socket 1 described earlier. In other words, under normal conditions, when replenishing automatically, the stop valve 8 of the vent pipe 4 and the stop valve 9 of the make-up water inlet pipe 5 are closed.
Only the stop valve 7 of the sealed water injection pipe 3 is opened. When the seal water in the floor drain socket 1 evaporates and decreases until the lower end of the seal water injection pipe 3 is exposed to the air, the make-up water in the make-up water tank 2 flows from the seal water injection pipe 3 to the floor drain socket. Enter 1. At this time, air flows into the make-up water tank 2 from the lower end of the water seal injection pipe 3, and when the water seal in the floor drain socket 1 reaches the lower end of the water seal injection pipe 3, the air in the floor drain socket 1 The supply of makeup water from the makeup water tank 2 is stopped due to the atmospheric pressure applied to the water sealing part. In this state, automatic replenishment to the floor drain port 1 is performed. Next, a case where the makeup water in the makeup water tank 2 decreases will be described.

The amount of water in the make-up water tank 2 is monitored by a level gauge 6,
When the level reaches a low position, perform an operation to inject water into the make-up water tank 2. In the present invention, only the amount of water sealed in the floor drain socket evaporates is automatically measured at the appropriate time.

It can be replenished.

In the present invention, the level difference between the top end of the make-up water tank and the floor drain port must be within 10M.

Further, in this explanation, the level gauge and each stop valve are monitored and operated by humans, but they can also be remotely operated valves such as electrode level meters and solenoid valves.

In this case, complete automation is also possible.

Note that the present invention can be used not only for sealing and replenishing drain ports, but also for automatically replenishing liquid up to a certain level, and can be utilized in a wide variety of fields.

〔Effect of the invention〕

According to the present invention, since only the evaporated amount of seal water in the drain socket can be automatically replenished, the time required for inspecting the drain socket and replenishing the seal water is reduced.

[Brief explanation of the drawing]

FIG. 1 shows a system diagram of an embodiment of the present invention. 1...Floor drain socket, 2...Supplementary water tank, 3...
・Water seal injection pipe, 4...Vent pipe, 5...Supplementary water inlet pipe, 6...Part one

Claims (1)

[Claims] 1. A drain socket water replenishment device characterized by automatically replenishing only the amount of sealed water in a water seal type drain socket that has evaporated and decreased.