JPH0654919A - Suction/exhaust device of air in suction pipe of fire pump by the same vacuum pump - Google Patents

Abstract

PURPOSE:To separately suck and exhaust the air in a suction pipe and in the air chamber of its outer wall via the same vacuum pump action by utilizing a high-pressure air cylinder. CONSTITUTION:A three-way cock 7 is provided between a multi-stage turbine pump 6 and a vacuum pump 4, the air in a suction pipe 3 removably screwed to the turbine pump 6 and in the air chamber 2 of its outer wall is sucked and exhausted with the same vacuum pump 4 via the action of the three-way cock 7, and air is fed to the air chamber 2 from a high-pressure air cylinder 1 to extend and expand it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a fire pump,
The present invention relates to a device for sucking and exhausting air inside a water absorption pipe in a fire pump that sucks and exhausts air in an air chamber formed inside and inside the water absorption pipe by the suction force of the same vacuum pump.

[0002]

2. Description of the Related Art As a conventional fire pump, an oil-free vacuum pump whose blades are made of a self-lubricating material has been proposed.

[0003]

In the conventional fire pump, it is necessary to pressurize and fill the air chamber of the outer wall of the suction pipe with clean air that does not contain water, oil, etc., depending on the conditions of use. It is not possible to exert its ability, there are many failures, and because it occupies an unreasonably large area, it is impossible to place the tools necessary for fire extinguishing, so there is a problem that the cost of equipment such as these is expensive. .

Therefore, the present invention has been made in view of the above circumstances, and a three-way cock is provided between a multistage turbine pump having a water absorption pipe and a vacuum pump, and air formed on the outer wall of the water absorption pipe. By connecting the chamber and the valve of the high-pressure air cylinder with a pipe, by filling a certain amount of air into the air chamber and utilizing the pressure, the water absorption pipe expands with the expansion of the outer wall of the water absorption pipe, and the valve is closed once, The purpose is to specifically suck and exhaust the air inside the water suction pipe and the air in the air chamber on the outer wall of the water suction pipe by the action of the vacuum pump by operating the three-way cock.

[0005]

According to the present invention, a three-way cock is provided between a vacuum pump and a multi-stage turbine pump to which a water suction pipe is detachably attached, and an air chamber is provided on the outer wall of the water suction pipe. And a valve of the high-pressure air cylinder are connected by a pipe, and the pipe is connected to each mechanism so that the air inside the water suction pipe and the air in the air chamber can be discharged by the same vacuum pump.

[0006]

When the valve of the high-pressure air cylinder is opened and a certain amount of air is sent into the air chamber of the water suction pipe through the pipe, the water suction pipe expands and expands.

Then, the engine of the fire fighting pump is driven, the three-way cock is operated, the vacuum pump is actuated, and the air inside the turbine pump and the water suction pipe is sucked.

The operation of the vacuum pump is stopped during the water discharge.

After the water is discharged, the drain cock of the turbine pump is opened to discharge the water accumulated in the pump, and at the same time, the water inside the water suction pipe is also removed by the air pressure inside the pump.

Since the valve body inside the three-way cock is formed in each of the open and closed passages, when the state of the operating rod fixed to the valve body is upright as shown in FIG. Since the pump and the vacuum pump communicate with each other, the air in the turbine pump and the water suction pipe is sucked toward the vacuum pump and discharged from the exhaust port.

The vacuum pump operates according to the operating state of the operating rod of the three-way cock to suck and exhaust the air in the air chamber on the outer wall of the water absorbing pipe, and also to suck and exhaust the air inside the water absorbing pipe so that the water absorbing pipe is It becomes flat and the volume is reduced.

[0012]

EXAMPLES Examples will be described with reference to the drawings.
FIG. 1 is an explanatory view for sucking and exhausting the air in the water suction pipe and the multi-stage turbine pump, and the water suction pipe 3 has an outer wall of the air chamber 2
A pipe 9 is communicated with the air chamber 2 from the valve 8 of the high pressure air cylinder 1 by the valve 8.

The mouth end of the water absorption pipe 3 is a multi-stage turbine pump 6
It is screwed on and off freely.

A drain cock 5 is provided at the lower end of the multi-stage turbine pump 6, and the pump 6 communicates with a three-way cock 7 via a pipe 9.

The inside of the three-way cock 7 contains a valve body, and the valve body forms open and closed passages and is fixed so that the valve body can be operated by an operating rod 11 from the outside.

Reference numeral 4 denotes a vacuum pump, which is provided with an exhaust port 12 and communicates with a pipe 13 and a three-way cock 7 to suck and exhaust the air in the water suction pipe 3 and the pump 6.

The embodiment shown in FIG. 2 is an explanatory view for sucking and exhausting the air in the air chamber formed on the outer wall of the water suction pipe, and in order to simplify the explanation, portions having the same functions as those in FIG. Since they are explained with the same reference numerals, they are omitted.

In the present embodiment, a pipe 14 is provided between a pipe 9 and a three-way cock 7 that connect the air chamber 2 formed on the outer wall of the water absorption pipe 3 and the valve 8 of the high-pressure air cylinder 1 to each other. The exhaust pipe 13 is arranged between the three-way cock 7 and the vacuum pump 4 so as to communicate with the vacuum pump 4 through the passage of, and an exhaust port 12 is formed in the pump 4.

[0019]

Since the present invention is constructed as described above, it has the following effects. Although the conventional fire pump has a large number of mechanisms and occupies a large area, the present invention uses the same vacuum pump to suck and exhaust the air inside the water suction pipe and the air chamber, and thus unnecessarily occupies an area inside the pump body. In addition, the air inside the water suction pipe is sucked and exhausted by a vacuum pump, and the water suction pipe becomes flat, the volume is reduced and the mechanism is extremely simple, so the failure is drastically reduced and further compared with the conventional pump. Since it is inexpensive and maintenance costs are low, the economic effect is remarkable. In particular, by using a high-pressure air cylinder, it is highly safe to handle and the economic effect is increased.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a state of suction and exhaust of air in a water suction pipe.

FIG. 2 is an explanatory diagram showing a suction / exhaust state of an air chamber formed on the outer wall of the water suction pipe.

[Explanation of symbols]

 1 High-pressure air cylinder 2 Air chamber 3 Water absorption pipe 4 Vacuum pump 6 Multi-stage turbine pump 7 Three-way cock

Claims (2)

[Claims] 1. A three-way cock is provided between a multi-stage turbine pump having a water suction pipe and a vacuum pump, and the air in the air chamber formed inside the water suction pipe and the outer wall is sucked and exhausted by the same vacuum pump. A device that sucks and exhausts the air inside the water suction pipe of a fire pump by the same vacuum pump. 2. The air of a high-pressure air cylinder is supplied into the air chamber of the outer wall of the water absorption pipe to give a constant pressure, and this is used as a water absorption pipe without expansion and expansion. A device that sucks and exhausts the air inside the water suction pipe of a fire pump with the same vacuum pump.