JP5362647B2 - Liquid pumping device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid pressure feeding device free of a risk to generate hammering at the destination of pressure feeding when an exhaust valve is opened and an air supply valve is closed. <P>SOLUTION: The air supply valve 20 is installed at a working steam lead-in port 11, and the exhaust valve 21 is mounted at a working steam exhaust port 13, while a liquid influx port opening/closing valve 50 is installed at a liquid influx port 16, and a liquid ejection port opening/closing valve 6 is mounted at a liquid ejection port 17. A float 3 and a snap mechanism 5 are installed inside a sealed vessel 2, wherein the snap 5 mechanism has a float arm 34, an auxiliary arm 37, and a coil spring 38. The air supply valve 20 and the exhaust valve 21 are coupled with the auxiliary arm 37 through a power transmitting shaft 46, and the liquid influx port opening/closing valve 50 and the liquid ejection port opening/closing valve 6 are coupled with the power transmitting shaft 46. The liquid ejection port opening/closing valve 6 is closed when the exhaust valve 21 is opened, the air supply valve 20 is closed and the liquid influx port opening/closing valve 50 is opened, while the liquid ejection port opening/closing valve 6 is opened when the exhaust valve 21 is closed, the air supply valve 20 is opened, and the liquid influx port opening/closing valve 50 is closed. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

The present invention relates to a liquid pumping device that pumps liquid such as hot water or fuel. The liquid pressure feeding device of the present invention is particularly suitable as a device for sending condensate generated in various steam using devices to a boiler or a waste heat utilization site.

A conventional liquid pumping device is disclosed in Patent Document 1, for example. This is because the closed vessel is provided with a working steam inlet, a working steam outlet, a liquid inlet and a liquid outlet, a supply valve is provided at the working steam inlet, and an exhaust valve is provided at the working steam outlet. A pressure check valve that allows only the flow of fluid to the liquid pressure destination is provided at the liquid outlet, and a float and snap mechanism are built in the sealed container. The snap mechanism is supported by the sealed container. An axis, a float arm and a sub arm rotating around the swing axis, a first axis supported by the float arm, a second axis supported by the sub arm, and the first and second axes. It has a spring attached in between, the float is connected to the float arm, the air supply valve and the exhaust valve are connected to the sub arm through the power transmission shaft, and the power is operated by operating the snap mechanism according to the lift of the float By snapping the transmission shaft Switch between opening and closing of the air supply valve and the exhaust valve, first opening the exhaust valve and closing the air supply valve to allow liquid to flow into the sealed container from the liquid inlet, then close the exhaust valve and open the air supply valve In the liquid pumping device that pumps the liquid accumulated in the sealed container from the liquid discharge port to the liquid pumping destination, the liquid inlet opening / closing valve that opens and closes the liquid inlet is connected to the power transmission shaft, the exhaust valve is opened, and the air supply valve When the valve is closed, the liquid inlet opening / closing valve is opened, and when the exhaust valve is closed and the air supply valve is opened, the liquid inlet opening / closing valve is closed.

JP 2009-299602 A

In the conventional liquid pumping device, when the exhaust valve is opened and the air supply valve is closed, a part of the working steam introduced into the sealed container from the working steam inlet is delayed due to the closing of the pumping side check valve. Since the oil flows out downstream of the pressure check valve, there is a problem that a hammer is caused downstream of the pressure check valve.

Therefore, the problem to be solved by the present invention is to provide a liquid pumping device that does not cause hammer on the liquid pumping destination side when the exhaust valve is opened and the air supply valve is closed.

In order to solve the above-described problems, the liquid pumping apparatus of the present invention is provided with an operating steam inlet, an operating steam outlet, a liquid inlet and a liquid outlet in a sealed container, and an air supply valve at the operating steam inlet. Provided, an exhaust valve is provided at the working steam discharge port, a float and a snap mechanism are incorporated in the sealed container, and the snap mechanism rotates around the swing shaft supported in the sealed container. A float arm and a sub-arm, a first shaft supported by the float arm, a second shaft supported by the sub-arm, and a spring attached between the first and second shafts. Is connected to the float arm, the air supply valve and the exhaust valve are connected to the sub arm via the power transmission shaft, and the power transmission shaft is snapped by operating the snap mechanism according to the lift of the float. Open and close the valve and exhaust valve First, the exhaust valve is first opened and the supply valve is closed, so that the liquid flows into the sealed container from the liquid inlet, and then the liquid accumulated in the sealed container is discharged by closing the exhaust valve and opening the supply valve. A liquid pumping device that pumps from the outlet to the liquid pumping destination, and connects the liquid inlet opening / closing valve that opens and closes the liquid inlet to the power transmission shaft, opens and closes the liquid inlet when the exhaust valve is opened and the air supply valve is closed When the valve is opened, the exhaust valve is closed, and the air supply valve is opened, the liquid inlet on / off valve is closed. The liquid outlet on / off valve that opens and closes the liquid outlet is connected to the power transmission shaft, and the exhaust valve is opened. When the air valve is closed and the liquid inlet opening / closing valve is opened, the liquid outlet opening / closing valve is closed, and when the exhaust valve is closed, the air supply valve is opened, and the liquid inlet opening / closing valve is closed, the liquid outlet opening / closing valve is opened. Features.

According to the present invention, the liquid discharge opening / closing valve for opening / closing the liquid discharge opening is connected to the power transmission shaft, and the liquid discharge opening / closing valve is opened when the exhaust valve is opened, the air supply valve is closed, and the liquid inlet opening / closing valve is opened. Closed, exhaust valve closed, air supply valve opened, liquid inlet on / off valve closed liquid outlet on / off valve opened, so when the exhaust valve is opened, air supply valve is closed and liquid inlet on / off valve is opened The liquid discharge opening / closing valve can be closed quickly, and the working steam introduced into the sealed container from the working vapor inlet can be prevented from flowing out to the downstream side of the liquid discharge opening / closing valve. It has the effect of not waking up.

It is sectional drawing of the liquid pumping apparatus concerning embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to FIG. The liquid pumping apparatus 1 according to the present embodiment is configured such that a float 3, a switching valve 4, a snap mechanism 5, a liquid outlet opening / closing valve 6, and a liquid inlet opening / closing valve 50 are arranged in a sealed container 2. The sealed container 2 has a main body portion 7 and a lid portion 8 connected by screws (not shown), and a liquid reservoir space 10 is formed inside. The lid 8 is provided with a working steam inlet 11, a working steam outlet 13, a liquid inlet 16, and a liquid outlet 17. An air supply valve 20 is attached inside the working steam inlet 11, an exhaust valve 21 is attached inside the working steam outlet 13, and a liquid inlet opening / closing valve 50 is attached inside the liquid inlet 16. The air supply valve 20 includes a valve case 22, a valve body 23, and an elevating rod 24. The valve case 22 has a through hole in the axial direction, and the upper end surface of the through hole functions as the valve seat 25. Four openings 26 are provided in the middle portion of the valve case 22 so as to communicate the above-described through holes with the outside. The valve body 23 is spherical and is on the working steam inlet 11 side, and is opened and closed when the upper end of the elevating rod 24 contacts. The lifting / lowering rod 24 passes through the through hole of the valve case 22 to the closed container 2 side and comes into contact with the connecting plate 27. The connecting plate 27 is connected to a power transmission shaft 28, and the power transmission shaft 28 is connected to the snap mechanism 5. The exhaust valve 21 includes a valve case 29, a valve body 30, and an elevating rod 31. The valve case 29 has a through hole in the axial direction, and has a valve seat 32 inside the through hole. The valve body 30 held and fixed to the upper end of the lifting rod 31 from below the valve seat 32 makes contact and opens and closes. Is. The lower end of the elevating bar 31 is connected to the power transmission shaft 28 by a pin. The liquid inflow opening / closing valve 50 includes a valve case 51 and a valve body 52. The valve case 51 has a through-hole in the axial direction, and has a valve seat 54 inside the through-hole. The valve body 52 contacts from below the valve seat 54 to open and close. Four openings 53 are provided in the middle portion of the valve case 51 to communicate the through hole and the outside. The lower end of the valve body 52 is connected to the connecting plate 27. The switching valve 4 is constituted by the supply valve 20 and the exhaust valve 21. When the supply valve 20 is opened, the exhaust valve 21 and the liquid inlet opening / closing valve 50 are closed, and when the supply valve 20 is closed, the exhaust valve 21 and the liquid inlet are closed. The on-off valve 50 opens.

The float 3 is supported by a bracket 36 via a float arm 34 and a swing shaft 35. The bracket 36 is integrally attached to the lid portion 8 of the sealed container 2 by screws (not shown). The snap mechanism 5 includes a swing shaft 35 supported in the sealed container 2, a float arm 34 and a sub arm 37 that rotate around the swing shaft 35, and a first shaft 39 supported by the float arm 34. The second shaft 41 supported by the sub-arm 37 and the coil spring 38 in a compressed state attached between the first and second shafts 39 and 41. The float arm 34 is composed of two parallel opposing plates, the float 3 is fixed to the left end, and the right side portion is rotatably supported by the swing shaft 35. Accordingly, the float 3 swings up and down around the swing shaft 35. A first shaft 39 parallel to the swing shaft 35 is stretched around the center of the float arm 34. A first spring receiving member 40 is rotatably supported on the first shaft 39. A sub arm 37 is rotatably supported on the swing shaft 35. The sub arm 37 is composed of two plates facing each other in parallel, and a second shaft 41 parallel to the swing shaft 35 is stretched over the left end portion. A second spring receiving member 42 is rotatably supported on the second shaft 41. A coil spring 38 in a compressed state is disposed between the first and second spring receiving members 40 and 42. The float arm 34 is provided with a semicircular elongated hole 43, and a stopper shaft 44 parallel to the swing shaft 35 is supported by the bracket 36 in the elongated hole 43. The stopper shaft 44 regulates the rotation range of the sub arm 37. A connecting shaft 45 parallel to the swing shaft 35 is attached to the right end portion of the sub arm 37 so as to pass through, and the intermediate portion of the power transmission shaft 28 is connected to the connecting shaft 45. Stopper shafts 55 and 56 that are parallel to the swing shaft 35 and restrict the swing range of the float arm 34 are supported by the bracket 36. The liquid discharge port opening / closing valve 6 that opens and closes the liquid discharge port 17 is attached to the lower bifurcated portion of the power transmission shaft 28. The liquid discharge port opening / closing valve 6 includes a liquid discharge port opening / closing valve body 57 and a valve body mounting shaft 58 parallel to the swing shaft 35 that rotatably attaches the ball center of the liquid discharge port opening / closing valve body 57 to the power transmission shaft 28. Is done. The liquid discharge port opening / closing valve body 57 opens and closes a drainage valve port 59 formed in a drainage valve seat 60 attached to the inner end of the sealed container 2 of the liquid discharge port 17. When the exhaust valve 21 and the liquid inlet opening / closing valve 50 are opened and the supply valve 20 is closed, the liquid discharge opening / closing valve 6 is closed, and when the exhaust valve 21 and the liquid inlet opening / closing valve 50 are closed and the supply valve 20 is opened, the liquid discharge opening is opened. The on-off valve 6 is opened.

  Next, the operation of the liquid pumping apparatus 1 of this embodiment will be described. First, the external piping of the liquid pumping apparatus 1 has a working steam inlet 11 connected to a high-pressure steam source, and a working steam discharge port 13 connected to a steam circulation pipe. The liquid inlet 16 is connected to a load such as a steam using device, and the liquid outlet 17 is connected to a liquid pressure destination such as a boiler. When there is no condensate in the liquid reservoir space 10 of the liquid pumping apparatus 1 of this embodiment, the float 3 is located at the bottom as shown in FIG. At this time, the supply valve 20 in the switching valve 4 is closed and the exhaust valve 21 is opened. Further, the liquid inlet opening / closing valve 50 is opened and the liquid discharge opening / closing valve 6 is closed. When condensate is generated in a load such as a steam using device, the condensate flows down from the liquid inlet 16 to the liquid pumping device 1 and accumulates in the liquid reservoir space 10. When the float 3 rises due to the condensate accumulated in the liquid reservoir space 10, the float arm 34 rotates clockwise about the swing shaft 35, and the first shaft 39, which is a connecting portion with the coil spring 38, moves upward. To the extension line of the line connecting the swing shaft 35 and the second shaft 41, the coil spring 38 is compressed and deformed. When the float 3 further floats and the first shaft 39 exceeds the extension of the line connecting the oscillating shaft 35 and the second shaft 41, the coil spring 38 suddenly recovers from deformation and the sub arm 37 is counterclockwise. The connecting shaft 45 is snapped upward by rotating in the turning direction. As a result, the power transmission shaft 28 connected to the connecting shaft 45 snaps upward, the air supply valve 20 is opened, the exhaust valve 21 is closed, the liquid inlet / outlet valve 50 is closed, and the liquid outlet opening / closing valve 6 is closed. Is opened.

When the air supply valve 20 is opened and the working steam inlet 11 is opened, high-pressure steam is introduced into the sealed container 2, the internal pressure rises, and the condensate accumulated in the liquid reservoir space 10 is vapor pressure. And discharged from the liquid discharge port 17 to an external boiler or waste heat utilization device. When the water level in the condensate reservoir space 10 is lowered due to the discharge of the condensate, the float 3 descends, and the float arm 34 rotates counterclockwise about the swing shaft 35, which is a connecting portion with the coil spring 38. The first shaft 39 moves downward and approaches an extended line connecting the swing shaft 35 and the second shaft 41, and the coil spring 38 is compressed and deformed. When the float 3 further descends and the first shaft 39 exceeds the extension of the line connecting the swing shaft 35 and the second shaft 41, the coil spring 38 suddenly recovers from deformation and the sub arm 37 rotates clockwise. The connecting shaft 45 snaps downward by rotating in the direction. As a result, the power transmission shaft 28 connected to the connection shaft 45 snaps downward, the supply valve 20 is closed, the exhaust valve 21 is opened, the liquid inlet opening / closing valve 50 is opened, and the liquid discharge opening / closing valve is opened. 6 is closed. As a result, the high-pressure steam in the sealed container 2 is discharged from the working steam discharge port 13 to the liquid generation source side, the pressure in the sealed container 2 decreases, and the liquid flows down and accumulates in the sealed container 2 again.

  The present invention is not limited to a condensate pressure feeding device that sends condensate generated in various steam using devices to a boiler or a waste heat utilization place, but can also be used in a liquid pressure feeding device that pumps liquid such as hot water or fuel.

DESCRIPTION OF SYMBOLS 1 Liquid pumping apparatus 2 Sealed container 3 Float 4 Switching valve 5 Snap mechanism 6 Liquid discharge port opening / closing valve 10 Liquid reservoir space 11 Working steam inlet 13 Working steam outlet 16 Liquid inlet 17 Liquid outlet 20 Air supply valve 21 Exhaust valve 28 Power transmission shaft 34 Float arm 35 Oscillating shaft 37 Sub arm 38 Coil spring 39 First shaft 41 Second shaft 50 Liquid inlet / outlet valve

Claims (1)

The closed container is provided with a working steam inlet, a working steam outlet, a liquid inlet and a liquid outlet, a supply valve is provided at the working steam inlet, and an exhaust valve is provided at the working steam outlet. A float and a snap mechanism are built in, and the snap mechanism includes a swing shaft supported in the sealed container, a float arm and a sub arm rotating around the swing shaft, and a first shaft supported by the float arm. And a second shaft supported by the sub arm, and a spring attached between the first and second shafts, the float is connected to the float arm, and the air supply valve and the exhaust valve are the power transmission shaft. It is connected to the sub arm via the valve and operates the snap mechanism in response to the lift of the float to move the power transmission shaft by snapping, thereby switching the supply valve and the exhaust valve to open and close. Liquid by closing the air valve A liquid pumping device that pumps liquid accumulated in the sealed container from a liquid discharge port to a liquid pumping destination by closing the exhaust valve and opening the air supply valve. When the liquid inlet opening / closing valve that opens and closes the inlet is connected to the power transmission shaft, the liquid inlet opening / closing valve is opened when the exhaust valve is opened and the supply valve is closed, and the exhaust valve is closed and the supply valve is opened When closing the liquid inlet on-off valve, connect the liquid outlet on-off valve that opens and closes the liquid outlet to the power transmission shaft, open the exhaust valve, close the air supply valve, and open the liquid inlet on-off valve. A liquid pumping apparatus, wherein a liquid discharge port on-off valve is opened when an outlet on-off valve is closed, an exhaust valve is closed, an air supply valve is opened, and a liquid inlet on-off valve is closed.

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