JPH04287900A - Self-priming tank additionally provided in front of pump - Google Patents

Abstract

PURPOSE:To provide a self-priming tank allowing the operation of a pump to be resumed without requiring priming or the like while separating debris in sea water or water sucked by the pump, by a filter member and also enabling back washing in the case of the filter member being clogged. CONSTITUTION:A filter member 13 is disposed at the intermediate part of a tank body 13 provided with a pump end connection 11 at its lower part and a suction port 12 at its upper part, and back washing end connections 18, 19 are provided in front of and behind the filter member 1 to form a self-priming tank additionally provided in front of a pump.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-priming tank installed in front of a pump for pumping up seawater, well water, recycled water, etc.

0002

2. Description of the Related Art In aquaculture farms, marine fish farms, etc., seawater, river water, well water, etc. are pumped up and used. This pump is equipped with a check valve (also called a foot valve) that prevents the water in the water suction pipe connected to the pump from flowing back even when the pump is stopped.

0003

[Problem to be Solved by the Invention] However, if the seawater is mixed with garbage and gets caught in the check valve,
As the water in the water suction pipe descends, the water cannot be pumped up the next time the pump is operated.For this reason, water must be pumped into the water suction pipe by priming water or removing the air from the water suction pipe with a vacuum device. There was a problem in that it was necessary to fill the tank and operate the pump, which required a long period of time and effort to prepare for operation. Further, such problems may also occur due to water falling in the water suction pipe due to water leakage from the pump itself, and may also be caused by subtle influences such as the size of the water suction pipe, the pumping height, etc. The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a self-priming tank attached in front of a pump that has a simple structure, does not require priming, and is easy to handle.

0004

[Means for Solving the Problems] A self-priming tank attached in front of the pump according to claim 1 which meets the above object is provided with a pump connection port at the bottom and a suction port at the top, in the middle of the tank body. A filtration member is provided at one end, and connection ports for backwashing are provided at the front and rear of the filtration member. Although it is preferable to provide a connection port for backwashing on the tank body, it is also possible to provide a branch port at the pump connection port and suction port or an extension thereof, and provide a connection port for backwash at this branch port. The present invention is applied. Further, the filtering member includes any one of a rostral shape, a net shape, and a filter cloth shape.

[0005]

[Operation] The self-priming tank attached in front of the pump according to claim 1 has a pump connection port at the bottom of the tank body and a suction port at the top of the tank body, so the foot valve etc. Even if the tank gets clogged with dirt and sand and the water in the water intake pipe drains out, the water in the tank will remain. When the pump is operated here, the water in the tank is sucked up, which creates a negative pressure in the tank and water suction pipe, so water is sucked up into the water suction pipe, and as a result, the pump can be operated without any problem. When the above operation is repeated and dirt or sand is sucked in, it is temporarily stopped by a filter member placed in the tank. Since connection ports for backwashing are provided before and after the filtering member, dirt, sand, etc. caught in the filtering member can be removed by flowing water from the opposite direction. Note that the backwash water here may be tap water, water stored in a tank, priming water for a pump, or the like.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments embodying the present invention will be described with reference to the attached drawings to provide an understanding of the present invention. As shown in FIG. 1, a self-priming tank 10 attached in front of a pump according to an embodiment of the present invention has a tank main body with a pump connection port 11 at the bottom and a suction port 12 at the top inside the tank. 13, and a filter member 14 disposed within the tank body 13. These will be explained in detail below.

The tank body 13 is made of an iron or stainless steel container, and its internal volume is 1 of the volume of the entire water intake pipe formed in the tank body 13 before the suction port 12.
/2 or more. In addition, the tank body 13
If the water lift height is high, the volume of the pump is made larger by taking into account the lift height and the degree of vacuum reached when the water is removed by operating the pump described below. A pump connection port 11 having a flange structure is provided at the bottom of the tank body 13, and can be connected to a pump 15. Further, an in-tank water suction pipe 16 is connected inside the tank body 13, and an external tank water suction pipe 17 is connected to the in-tank water suction pipe 16 via a flange connection, the end of which is inserted into the sea.

A filtering member 14 is provided in the center of the tank body 13, and in this embodiment, the filtering member 14 is made of a stainless steel mesh plate, and is connected to a water suction pipe 16 inside the tank and a water suction pipe outside the tank. Dust, sand, etc. passing through the pipe 17 can be removed and separated. The filtering member 14 may also be a strainer or a strainer in which a large number of reinforcing bars are arranged at predetermined intervals.

A connection port 18 for backwashing is provided at the top of the tank body 13, and a connection port 19 is provided at the bottom.
An existing pipe 23 equipped with a pump (not shown) is connected to the connection port 19 via a ball valve 22. In addition, the water suction pipe 16 inside the tank and the water suction pipe 17 outside the tank
A butterfly valve 24 (or sluice valve) is provided at the connection with the valve 24 so that it can be closed.

Therefore, when using the self-priming tank 10 attached in front of this pump, the pump 15 is operated in advance to fill the tank body 13 with water. in this case,
Even if water leaks from the water suction pipe 17 outside the tank, the water suction pipe 1 inside the tank
The water level will not fall below the suction port 12 on the top surface of the tank. Here, if there is no water in the water suction pipes 16 and 17 and the pump 15 is operated, the pump 15 pumps out the water accumulated in the tank body 13, which creates a negative pressure inside the tank, so that water can be absorbed. Water is sucked up through the pipes 16 and 17, resulting in continuous operation. If dust or the like is sucked up by continuous operation, it will be separated by the filter member 14 and will not flow into the pump 15. Furthermore, since the filter member 14 is wider than the cross-sectional area of the piping, long-term operation can be ensured without being immediately clogged with dust. In this case, it has been confirmed through experiments that power consumption can be reduced by approximately 10% compared to the case without a conventional self-priming tank. After running for a certain period of time, the filter member 14 becomes clogged, so stop the pump 15, close the butterfly valve 24 at the bottom, and open the ball valves 22, 20 to drain water from the opposite direction inside the tank body 13. The separated garbage, sand, etc. are discharged together with water from the dust discharge pipe 21. In addition, objects such as sand that are clogged in the filter member 14 are removed by opening the flange of the inspection hole 25, but the lid 26 of this flange is made of a strong transparent plate to check the internal situation. It is preferable to leave it visible from the outside. In addition, solenoid valves are used for the above valves,
It is also possible to detect the accumulation of dirt using a water pressure difference or the current of a pump-driving motor, and automatically remove the dirt, sand, etc.

[0011]

Effects of the Invention: As is clear from the above explanation, the self-priming tank installed in front of the pump according to the present invention has a simple structure, and the water suction pipe is emptied after the pump is stopped. Even if the pump reaches a certain point, the pump can be restarted by actively using the water in the tank itself. Further, the filter member can remove dust, sand, etc. mixed in with the seawater etc. that are sucked in, and the dust, sand, etc. can be easily removed by backwashing.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of a self-priming tank installed in front of a pump according to an embodiment of the present invention.

[Explanation of symbols]

10 Self-priming tank attached in front of the pump 11 Pump connection port 12 Suction port 13 Tank body 14 Filtration member 15 Pump 16 Water suction pipe inside the tank 17 Water suction pipe outside the tank 18 Connection port 19 Connection port 20 Ball valve 21 Dust exhaust pipe 22 Ball valve 23 Existing pipe 24 Butterfly valve 25 Inspection hole 26 Lid

Claims (1)

[Claims] [Claim 1] A filtration member is provided in the middle part of the tank body, which has a pump connection port at the bottom and a suction port at the top,
Moreover, the self-priming tank attached in front of the pump is characterized in that connection ports for backwashing are provided at the front and rear of the filter member, respectively.