JPH0579573A - Automatic air vent valve for reciprocating pump - Google Patents

Abstract

PURPOSE:To provide an automatic air vent valve of a reciprocating pump. CONSTITUTION:As for an automatic air vent valve 9 arranged between the drain chamber 2 and the excessive water port 5 of a reciprocating pump, an inlet 12 opened to the drain chamber 2 and a valve seat 13 are installed at both the edges in the lateral direction of a valve chamber 11 formed on a valve body 10 arranged in the nearly horizontal direction, and a ball valve body 14 is arranged in shiftable manner in the valve chamber 11, and the passage 15 of the valve seat 13 communicates to the excessive water port 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic air vent valve for a reciprocating pump.

[0002]

2. Description of the Related Art In a reciprocating pump, it is necessary to quickly remove the air inside the pump to improve the suction performance. Conventional reciprocating pumps are not provided with an appropriate device for venting air, and in general, air is vented by manually operating a pressure release lever of a pressure regulating valve. However, in this case, even if the pressure release lever is operated, the valve itself of the pressure regulating valve is urged by the pressure regulating spring and remains on the outlet, so that there is a problem that air cannot be completely released. It was

[0003]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to eliminate the above-mentioned problems of the prior art and to provide an automatic air vent valve for a reciprocating pump which is simple and convenient.

[0004]

According to the present invention, the above-mentioned problem is an automatic air vent valve arranged between the drainage chamber and the spill port of a reciprocating pump, which is arranged substantially horizontally. An inlet opening to the drain chamber and a valve seat are respectively provided at both lateral ends of a valve chamber formed in the valve body, and a ball valve element is movably disposed in the valve chamber, and a passage of the valve seat is provided. This is solved by an automatic air bleeding valve of a reciprocating pump which communicates with the spill port.

[0005]

Therefore, the ball valve element separates from its valve seat by its own weight when the pump is bleeding air and at low speed without pressure to open the central passage, discharges the air in the drainage chamber of the pump to the spill port, and pressurizes the pump. Also, at the time of high speed rotation without pressure, the ball valve body is pressed against its valve seat by water pressure to close the central passage, and automatically shuts off the flow of water from the drainage chamber to the spill port through the automatic air vent valve.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of an essential part of a reciprocating pump provided with an automatic air bleeding valve according to an embodiment of the present invention, showing the state of the pump when bleeding air and when rotating at low pressure without pressure, and FIG. FIG. 3 is a cross-sectional view similar to that of FIG. 1, but showing the state during pressurization and high-speed rotation without pressure of the pump. The illustrated reciprocating pump has a drainage chamber 2 for extracting pressurized water to the outside from a drainage port (not shown) in the pump body 1, and a cage drainage valve 3 is disposed in the drainage chamber 2. A pressure regulating valve chamber 4 is provided above the drainage chamber 2, and the pressure regulating valve chamber 4 has a spill port 5 extending laterally thereof and opened to the outside. The pressure regulating valve chamber 4 has an annular valve seat 7 centered on an opening 6 communicating with the drainage chamber 2, and a biasing spring (not shown) biases the valve seat 7 from above to open the opening 6. A pressure regulating valve body 8 that is normally closed is included to cut off communication between the drainage chamber 2 and the spill port 5. When the pressure inside the drainage chamber 2 becomes larger than the spring bias pressure applied to the pressure regulating valve body 8, the pressure regulating valve body 8 of the pressure regulating valve chamber 4 becomes
It moves away from the valve seat 7 upward, so that the overpressure water in the drainage chamber 2 escapes through the opening 6 of the valve seat 8 to the spill port 5,
Adjust the pressure inside.

Further, the pump body 1 is provided with the drain chamber 2
An automatic air bleeding valve 9 is fitted to the lateral portion of the. The automatic air bleeding valve 9 has a valve main body 10 extending substantially horizontally in the lateral direction, and the valve main body 10 is externally screwed to the pump main body 1 and fixed in the pump main body 1. The valve body 10 has a valve chamber 11 formed at an inner end thereof, and the valve chamber 11 has an inlet 1 opened at the inner end thereof into the drainage chamber 2.
2, and an annular valve seat 13 is provided at the end opposite to the inlet 12. Further, a ball valve body 14 made of a ceramic material or the like, which is larger than the inlet 12 and the opening 15 of the valve seat 13 and smaller than the inner diameter of the valve chamber 11, is provided in the valve chamber 11 on the bottom surface of the valve chamber 11. It is movably arranged in the horizontal direction. In the state shown in FIG. 1, the ball valve element 14 is lowered by its own weight, and its center is deviated downward from the horizontal center axis of the annular valve seat 13. In the state shown in FIG. 2, the ball valve body 14 is moved to the valve seat 1 by the pressure in the drainage chamber 2.
3, the passage 15 which is the central opening of the valve seat 13 is closed, and at this time, the ball valve body 14 is held apart from the bottom surface of the valve chamber 11 upward. The passage 15 communicates with an outlet 16 of the automatic air bleeding valve 9, and the outlet 16 communicates with a spill port 5 through a passage 17 in the pump body 1.

When the reciprocating pump is bleeding air and at low speed without pressure, the automatic air bleeding valve 9 is in the state shown in FIG. 1, its ball valve element 14 is separated from the valve seat 13, and the passage 15 is opened. There is. Therefore, the drain valve 3 to the drain chamber 2
The air discharged inside enters the valve chamber 11 from the inlet 12 of the automatic air bleeding valve 9, further passes through the passage 15 and the outlet 16, and further passes through the passage 17 of the pump body 1 and is quickly and completely discharged to the spill port 5. It At this time, the water flowing out from the drainage chamber 2 to the automatic air vent valve 9 together with the air flows to the spill port 5, so that the water does not leak to the outside.

When the air bleeding is completed and the pump is pressurized and is rotating at high speed without pressure, the automatic air bleeding valve 9 is in the state shown in FIG.
Since the passage 15 is closed by crimping it to prevent the water from flowing from the drainage chamber 2 through the automatic air vent valve 9 to the spill port 5, the pressurized water can be taken out without trouble.

[0010]

According to the structure of the present invention described above, in the present invention, the air is delivered quickly, so that the water seal and the V packing of the pump are less likely to be prematurely worn by the idle operation, and the plunger is made of ceramic. The risk of breakage due to heat can be reduced, air can be automatically and reliably discharged, and air and water are discharged to the spill port of the pump during the air discharging operation, so there is no leakage of water to the outside, Since the opening and closing of the valve does not use mechanical force such as a spring, the structure is simple and there are few failures, and the air vent valve is automatically opened at low speed rotation and closed at high speed rotation,
Further, there are effects such as easy replacement of parts.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a main part of a reciprocating pump provided with an automatic air bleeding valve according to an embodiment of the present invention, showing a state of the pump when bleeding air and at low pressure and low speed rotation.

FIG. 2 is a sectional view similar to FIG. 1, but showing a state during pressurization of the pump and during high-speed rotation without pressure.

[Explanation of symbols]

 2 Drainage chamber 5 Spill port 9 Automatic air vent valve 10 Valve body 11 Valve chamber 12 Inlet 13 Valve seat 14 Ball valve disc 15 Passage

Claims (1)

[Claims] 1. An automatic air vent valve (9) disposed between a drainage chamber (2) and a spillway (5) of a reciprocating pump, the valve body (10) being disposed substantially horizontally. An inlet (12) and a valve seat (13) opened to the drain chamber (2) are provided at both ends of the formed valve chamber (11) in the lateral direction,
A reciprocating motion characterized in that a ball valve body (14) is movably arranged in the valve chamber (11) and a passage (15) of the valve seat (13) communicates with the spill port (5). Automatic air vent valve for pump.