JPH0626488A - Steam separator - Google Patents

Abstract

PURPOSE:To design a device itself in a compact size, and also improve its reliability. CONSTITUTION:A steam separator is provided with a valve box 14 in which the opening of a discharge pump side pipe passage 9a is connected to the lower part thereof and the opening of the vacuum pump side part pipe passage 9b is connected to the upper part thereof, and a valve body 15 which is slided in vertical direction in the valve box 14 and which has a small hole 16 for communicating the opening port of the intake pipe 9a connected to a part which is sliding contact with the valve box 14 and/or the lower part of the valve box 14, to the opening port of the intake pipe 9b connected to the upper part of the valve box 14. In the case where suction of water is started by a vacuum pump 3 for priming, the valve body 15 is lifted upward by flowing resistance when water passes through the small hole 16 of the valve body 15 so as to seal the opening port of the vacuum pump side pipe passage 9b connected to the upper part of the valve box 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water / water separator provided in the middle of an intake pipe connecting a water absorption side of a water discharge pump and an intake side of a priming vacuum pump provided in the water discharge pump.

[0002]

2. Description of the Related Art Conventionally, in order to prevent water sucked into a priming vacuum pump from entering, a water vapor is provided in the middle of an intake pipe connecting the suction side of the priming vacuum pump and the suction side of a water discharge pump. There are technologies that provide a separation device.

Such a technique has the structure shown in FIG. 4, for example. In the figure, 101 is a water discharge pump, 10
2 is a suction pipe of the water discharge pump 101, 103 is a vacuum pump,
Reference numeral 104 is an intake pipe that connects the water intake pipe 102 and the intake side of the vacuum pump 103, and 105 is a steam separation device provided in the middle of the intake pipe 104.

The air / water separator 105 will be described in detail. An airtight and liquid-tight intermediate tank 106 is provided in the middle of the intake pipe 104 connecting the water intake pipe 102 and the intake side of the vacuum pump 103. Thus, the intake pipe 104 is divided into a water discharge pump side pipe line 104a and a vacuum pump side pipe line 104b.

The end of the water discharge pump side pipe 104a is inserted into the tank 106 from the upper portion of the intermediate tank 106,
It opens downward. On the other hand, the vacuum pump side pipe line 10
The end of 4b is located at the top of the intermediate tank 106
06, and its open end 104c is opened downward.

The open end portion 10 of the vacuum pump side pipe line 104b
4c is opened and closed by a vacuum pump protection valve 107 that operates depending on the water level in the intermediate tank 106. The vacuum pump protection valve 107 is a valve seat 1 attached to the open end 104c of the vacuum pump side conduit 104b.
08, a connecting rod 109 whose one end is rotatably supported on the side wall of the intermediate tank 106, a float 110 provided at the other end of the connecting rod 109, and the above-mentioned opening which is attached at an intermediate position of the connecting rod 109 upward. Valve seat 1 attached to the end 104c
08 and a conical valve element 111 that closes off 08.

[0007] The steam separation device 105 configured as described above.
When the vacuum pump 103 is driven and the inside of the intake pipe 104 and the intermediate tank 106 has a negative pressure, water is sucked from a water source (not shown) through the water suction pipe 102 of the water discharge pump 101, and when priming is performed, the priming is Completed, water discharge pump 10
When the inside of 1 is filled with water, the water is discharged from the water discharge pump side pipe line 10
4a and then enters the intermediate tank 106 and gradually pushes up the float 110 installed in the intermediate tank 106 according to its water level. When the float 110 reaches a predetermined position, the valve body 111 causes the valve seat 108 to move. It is pressed against and the vacuum pump side pipe line 104b is closed to prevent water from entering the vacuum pump 103 (a state indicated by a chain double-dashed line in FIG. 4).

[0008]

However, in the above-mentioned conventional steam separator, the intermediate tank 106 for temporarily storing the water that has entered the intake pipe 104 is provided, and the water is stored in the intermediate tank 106. Since the vacuum pump side conduit 104b is closed by the float 110 that moves up and down by buoyancy, a certain amount of the capacity of the intermediate tank 106 is necessary to make the up and down movement of the float 110 due to the buoyancy of water smooth. Therefore, the device itself was large.

Further, the intermediate tank 106 is vigorously filled with water.
When it enters the inside, the float 110 cannot keep up due to the buoyancy, and there is a concern that water will enter the vacuum pump 103, and the device lacks reliability.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object thereof is to provide a highly reliable steam-water separation device which can be designed compactly. .

[0011]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention is provided in the middle of an intake pipe connecting a water absorption side of a water discharge pump and an intake side of a priming vacuum pump attached to the water discharge pump. In the air / water separator, the valve box in which the opening of the intake pipe communicating with the water intake side of the water discharge pump is connected to the lower portion, and the opening of the intake pipe communicating with the intake side of the priming vacuum pump is connected to the upper portion. And an opening of an intake pipe which slides in the valve box in the vertical direction and which is connected to the sliding contact portion with the valve box and / or itself and which is connected to the lower part of the valve box and the intake connected to the upper part of the valve box. A valve body having pores communicating with the opening of the pipe is provided, and while the air is being sucked by the priming vacuum pump, the air passes through the pores of the valve body and the priming vacuum from the water discharge pump side. It flows to the pump side and sucks water with a priming vacuum pump. If it starts, the flow resistance of the water when passing through the pores of the valve body raises the valve body upward, and communicates with the intake side of the priming vacuum pump connected to the upper part of the valve box. It is configured to close the opening of the intake pipe.

[0012]

According to the air / water separator of the present invention, the valve body mounted in the valve box is moved by utilizing the difference in flow resistance between air and water, so that water is temporarily stored and the float is floated. No intermediate tank is required, and the device itself is compact. Also, unlike raising the float by buoyancy, its movement is an agile and reliable device.

[0013]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Here, FIG. 1 is a side view showing a fire pump using the steam / water separator according to the present invention, and FIGS. 2 and 3 are sectional views of the steam / water separator according to the present invention.

The fire pump 1 has a water discharge pump 2 such as a centrifugal pump, and a priming vacuum pump 3 such as a vane pump. A water suction port 4 is formed on a side wall of the water discharge pump 2, and a water suction pipe 5 extending to a water source is detachably attached to the water suction port 4. A discharge port 6 is formed on the outer peripheral wall of the water discharge pump 2, and a check valve 7 that opens and closes the discharge port 6 by positive pressure or negative pressure inside the water discharge pump 2 is attached to the discharge port 6.

A suction port 8 is formed near the water suction pipe 5 of the water discharge pump 2, and the suction port 8 is an intake pipe 9 made of a pipe.
And is connected to the suction side of the priming water vacuum pump 3. A ball check valve 10 is arranged at the inlet of the intake pipe 9 on the suction port 8 side. A steam / water separator 11 is connected in the middle of the intake pipe 9, whereby the intake pipe 9 is divided into a water discharge pump side pipe line 9a and a vacuum pump side pipe line 9b. In the figure, 12 is an electromagnetic valve, and 13 is an exhaust pipe.

The air / water separator 11 provided in the middle of the intake pipe will be described with reference to FIGS. 2 and 3. The air / water separator 11 has a cylindrical airtight and liquid-tight valve box 14.
The valve box 15 is mainly composed of a valve body 15 which slides vertically.

The lower end of the valve box 14 is connected to the open end of the water discharge pump side pipe line 9a which communicates with the suction port 8 side of the water discharge pump 2, and the upper part communicates with the intake side of the priming vacuum pump 3. The open end of the vacuum pump side conduit 9b is connected. In addition, the valve body 15 has a fine hole that communicates the opening of the water discharge pump side conduit 9a connected to the lower portion of the valve box 14 and the opening of the vacuum pump side conduit 9b connected to the upper portion of the valve box 14. A plurality of 16 are formed, and a valve portion 17 that opens and closes the opening of the vacuum pump side conduit 9b of the valve box 14 is formed at the upper end of the valve body 15.

A passage 18 for communicating the inside of the valve box 14 with the atmosphere is formed in the upper portion of the valve box 14, and a closing valve 19 is provided in the passage 18. The shut-off valve 19 is opened and closed by the tip of a piston 22 that moves with the sliding of the valve body 15 in a cylinder 21 having an opening 20 formed in its side wall.

To operate the fire fighting pump 1 using the steam / water separator 11 of the present invention constructed as described above, first, the water discharge pump 2 is driven. Then
An electromagnetic clutch (not shown) is operated to connect the rotating shafts of the water discharge pump 2 and the priming vacuum pump 3 to drive the priming vacuum pump 3 as well.

When the priming water vacuum pump 3 is driven, a negative pressure is produced in the intake pipe 9 and in the vicinity of the water intake 4 of the water discharge pump 2,
It performs priming to suck water from a water source through the water absorption pipe 5.
At this time, since the valve body 15 of the air / water separator 11 has a small flow resistance of the air passing through the pores 16 formed in the valve body 15, the valve body 15 stays downward due to its own weight and is shown in FIG. Thus, the state in which the air circulation path is secured is maintained.

When the priming vacuum pump 3 is continuously driven in this state, the water from the water source eventually fills the water discharge pump 2, and the suction port 8, the check valve 10 and the water discharge pump side pipe 9 are provided.
It enters into the valve box 14 of the steam separator 11 via a.

The water that has entered the valve box 14 is
Although it tries to move upward through the pores 16 of the valve body 15 installed therein, the valve body 15 is lifted up due to the flow resistance of water as it attempts to pass through the pores 16. As shown in FIG. 3, the valve portion 1 provided at the upper end of the valve body 15
7 closes the opening of the vacuum pump side pipe line 9b of the valve box 14,
Water is prevented from entering the vacuum pump side pipe line 9b.

At this time, the shut-off valve 19 provided on the upper portion of the valve box 14 is opened by the tip of the piston 22 which moves upward with the movement of the valve body 15, so that the inside of the valve box 14 becomes an atmospheric pressure and water. Suction stops.

When the water discharge pump 2 is filled with water and the pressure inside the water discharge pump 2 rises to a predetermined pressure, the check valve 7 opens and the water is discharged from the discharge port 6. At this time, as in the conventional case, this pressure is detected by a pressure switch (not shown), the signal is sent to an electromagnetic clutch to disengage the electromagnetic clutch, the priming vacuum pump 3 is stopped, and the signal is separated into water and water. Device 1
1 is fed to a solenoid valve 12 provided in the lower part of the unit 1, and the solenoid valve 12 is opened to drain the water accumulated in the steam separator 11.

When water is being discharged from the fire fighting pump 1, if the pump is to be stopped and then to be driven again, the water discharge pump 2 is first stopped. When the water discharge pump 2 is stopped, the water inside the pump 2 tries to fall through the water suction pipe 5 and the pressure becomes negative pressure, and the check valve 7 closes and the discharge port 6 is closed. At this time, the ball check valve 10 provided at the inlet of the intake pipe 9 is also closed because the pressure inside the pump 2 becomes negative. Since the discharge port 6 and the ball-type check valve 10 are closed in this way, the water in the pump 2 does not fall, and when the water discharge pump 2 is re-driven, water can be immediately absorbed and discharged.

If the water in the pump 2 should fall, the priming vacuum pump 3 will be re-driven. In this case, the water in the steam / water separator 11 is in the atmosphere above. Since it is opened to the bottom and the lower solenoid valve 12 is opened to smoothly drop water, it is possible to immediately perform intake operation,
It is possible to prime the water discharge pump 2.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above-mentioned embodiment,
Various modifications and changes can be made based on the technical idea of the present invention.

For example, in the above embodiment, the air / water separating device 11 which is constituted by the cylindrical valve box 14 and the valve body 15 which slides in the valve box 14 in the vertical direction has been described. These shapes are not limited to those of the embodiment.

Further, the valve body 1 constituting the air / water separator 11
The pores 16 formed in 5 need not be formed in the valve body 15 itself as in the embodiment, but are formed by a gap or a notch in the sliding contact portion of the valve body 15 with the valve box 14. Good.

[0031]

According to the air / water separator of the present invention,
Since the valve body mounted in the valve box is moved by utilizing the difference in flow resistance between air and water, an intermediate tank for temporarily storing water and floating the float is not required, and the apparatus itself becomes compact. Also, unlike raising the float by buoyancy, its movement is an agile and reliable device.

[Brief description of drawings]

FIG. 1 is a side view showing a fire-fighting pump using a steam / water separator according to the present invention.

FIG. 2 is a vertical sectional view of a steam separation device according to the present invention.

FIG. 3 is a vertical cross-sectional view of a steam / water separator according to the present invention.

FIG. 4 is a side view showing a fire-fighting pump using a conventional steam separator.

[Explanation of symbols]

 1 Fire pump 2 Water discharge pump 3 Vacuum pump for priming water 4 Water suction port 5 Water suction pipe 6 Discharge port 7 Check valve 8 Suction port 9 Intake pipe 9a Water discharge pump side pipe 9b Vacuum pump side pipe 10 Ball check valve 11 Air / water separator 12 Solenoid valve 13 Exhaust pipe 14 Valve box 15 Valve body 16 Pore 17 Valve part 18 Passage 19 Closing valve 20 Opening 21 Cylinder 22 Piston

Claims (1)

[Claims] 1. A steam-water separator provided in the middle of an intake pipe connecting a water suction side of a water discharge pump and a suction side of a priming vacuum pump provided in the water discharge pump, the communication being connected to the water suction side of the water discharge pump. The valve box having the opening of the intake pipe connected to the lower part, the opening of the intake pipe communicating with the intake side of the priming vacuum pump being connected to the upper part, and sliding vertically in the valve box, A valve body having a fine hole for communicating the opening of the intake pipe connected to the lower portion of the valve box and the opening of the intake pipe connected to the upper portion of the valve box is provided at the sliding contact portion with the box and / or itself. While sucking air by the priming vacuum pump, the air passes through the pores of the valve body and flows from the water discharge pump side to the priming vacuum pump side, and starts sucking water by the priming vacuum pump. The water passes through the pores of the valve body, The valve body is lifted upward by the flow resistance at the time of closing, and the opening of the intake pipe communicating with the intake side of the priming vacuum pump connected to the upper part of the valve box is closed by the lifted valve body. Air-water separation device characterized by.