JP2011163545A - Liquid pumping device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid pumping device, not causing hammering on a liquid pressure feed destination side, when an exhaust valve is opened and an air supply valve is closed. <P>SOLUTION: The air supply valve 53 is disposed to an operating vapor introduction port 11, the exhaust valve 47 is disposed to an operating vapor discharge port 13, an inlet side check valve 57 opened to a liquid inlet port 16 from the outside is disposed to the liquid inlet port 16, and a liquid discharge port on-off valve 6 is disposed to the liquid discharge port 17. A float 3 and a snap mechanism 5 are incorporated in a sealed vessel 2. The snap mechanism 5 has a float arm 22, an auxiliary arm 23, and a coil spring 26. The air supply valve 53 and the exhaust valve 47 are connected to the auxiliary arm 23 through a power transmission shaft 46, and the liquid discharge port on-off valve 6 is connected to the power transmission shaft 46. The liquid discharge port on-off valve 6 is closed when the exhaust valve 47 is opened and the air supply valve 53 is closed, and the liquid discharge port on-off valve 6 is opened when the exhaust valve 47 is closed and the air supply valve 53 is opened. <P>COPYRIGHT: (C)2011,JPO&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. An inlet check valve that allows only the flow of liquid to the sealed container is provided at the liquid inlet, and a pressure check valve that allows only the flow of fluid to the liquid pressure destination is provided at the liquid outlet, and is sealed. A float and a snap mechanism are built in the container. 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 supported by the float arm. , 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 powered. It is connected to the sub arm via the transmission shaft, and the float rises. In response to this, the snap mechanism is operated to snap the power transmission shaft to switch between opening and closing of the supply valve and the exhaust valve, and by first opening the exhaust valve and closing the supply valve, the liquid is supplied from the liquid inlet. The liquid accumulated in the sealed container is pumped from the liquid discharge port to the liquid pressure destination by flowing into the sealed container and then closing the exhaust valve and opening the air supply valve.

JP2008-309285A

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 outlet, an inflow check valve that allows only the flow of liquid to the sealed container is provided at the liquid inlet, and a float and a snap mechanism are built in the sealed container, The snap mechanism includes a swing shaft supported in the sealed container, a float arm and a sub arm rotating around the swing shaft, a first shaft supported by the float arm, and a first shaft supported by the sub arm. Two shafts and a spring attached between the first and second shafts, the float 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, The snap mechanism is operated as the float moves up and down. By snap-moving the power transmission shaft, switching between opening and closing of the supply valve and the exhaust valve is performed, and by first opening the exhaust valve and closing the supply valve, the liquid flows into the sealed container from the liquid inlet, In the liquid pumping device that pumps the liquid accumulated in the sealed container from the liquid discharge port to the liquid pumping destination by closing the exhaust valve and opening the air supply valve, the liquid discharge port opening / closing valve that opens and closes the liquid discharge port is used as the power transmission shaft The liquid discharge port on / off valve is closed when the exhaust valve is opened and the air supply valve is closed, and the liquid discharge port on / off valve is opened when the exhaust valve is closed and the air supply valve is opened.

According to the present invention, the liquid discharge port on / off valve that opens and closes the liquid discharge port is connected to the power transmission shaft, and when the exhaust valve is opened and the air supply valve is closed, the liquid discharge port on / off valve is closed and the exhaust valve is closed. Since the liquid outlet opening / closing valve is opened when the air valve is opened, the liquid outlet opening / closing valve can be quickly closed when the exhaust valve is opened and the air supply valve is closed. It is possible to prevent the working steam introduced into the inside from flowing out to the downstream side of the liquid discharge opening / closing valve, and there is an effect that no hammer is caused on the liquid pressure destination side.

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, and a liquid discharge opening / closing valve 6 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. The snap mechanism 5 includes a swing shaft 21 supported in the sealed container 2, a float arm 22 and a sub arm 23 that rotate around the swing shaft 21, and a first shaft 24 supported by the float arm 22. The second shaft 25 is supported by the sub-arm 23, and the coil spring 26 is in a compressed state attached between the first and second shafts 24, 25. The swing shaft 21 is supported in the sealed container 2 by a bracket (not shown). The float arm 22 is composed of two plates facing each other in parallel, and a first shaft 24 parallel to the swing shaft 21 is stretched over the left end portions of the two plates, and is fixed to the float 3 on the first shaft 24. The attached mounting portions 30 are connected. A first spring receiver 28 is rotatably supported on the first shaft 24. The float arm 22 is supported at its central portion so as to be rotatable by the swing shaft 21. Therefore, the float arm 22 swings up and down around the swing shaft 21 following the float 3 sinking. The sub-arm 23 is supported at its central portion so as to be rotatable on the swing shaft 21. The sub arm 23 is composed of two plates facing each other in parallel, and a second shaft 25 parallel to the swing shaft 21 is stretched over the left end portions of the two plates. A second spring receiver 29 is rotatably supported on the second shaft 25. A compressed coil spring 26 is disposed between the first and second spring receivers 28 and 29. A stopper shaft 40 is stretched over the bracket to the lower right of the swing shaft 21, and the stopper shaft 40 is supported in the sealed container 2 by the bracket. A window 41 through which the stopper shaft 40 passes is opened in the float arm 22, and the right end portion of the window 41 abuts against the stopper shaft 40, so that the rotation range of the float arm 22 in the clockwise direction when the float 3 floats is increased. Since it is regulated, the stopper shaft 40 becomes the upper limit stopper of the float arm 22. A window 42 through which the stopper shaft 40 passes is opened in the sub arm 23, and the right end portion of the window 42 abuts on the stopper shaft 40, thereby restricting the rotation range of the sub arm 23 in the clockwise direction due to the lowering of the float 3. Therefore, the stopper shaft 40 becomes the lower limit stopper of the sub arm 23. A connecting shaft 43 that connects the two plates of the float arm 22 is stretched over the right end of the float arm 22.

A transmission shaft mounting shaft 45 is stretched over the sub arm 23 to the upper right of the stopper shaft 40, and an intermediate portion of the power transmission shaft 46 is rotatably connected to the transmission shaft mounting shaft 45. The upper end of the power transmission shaft 46 is connected to the switching valve 4. The switching valve 4 includes an exhaust valve 47 whose lower end is connected to the power transmission shaft 46, an air supply / exhaust case 48 in which the exhaust valve 47 is accommodated except for a lower portion of the exhaust valve 47, and an air supply valve 53. The A small-diameter operation rod 49 is integrally formed at the upper end of the exhaust valve 47. A supply / exhaust case 48 attached to the lid portion 8 of the hermetic container 2 with a screw (not shown) is provided with an intake valve port 50 of the operating steam inlet 11, and the operating steam exhaust is formed on the side below the supply valve port 50. An exhaust valve port 51 for the outlet 13 is formed. The exhaust valve port 51 is opened and closed by a shoulder 52 of the exhaust valve 47. A spherical air supply valve 53 that opens and closes the air supply valve port 50 is disposed on the side of the operation steam introduction port 11 of the air supply valve port 50, and the air supply valve 53 is opened by an operation rod 49 of the exhaust valve 47. Since the shoulder 52 of the exhaust valve 47 closes the exhaust valve port 51, the rotation of the sub arm 23 in the counterclockwise direction is restricted, so the shoulder 52 of the exhaust valve 47 serves as the upper limit stopper of the sub arm 23. . The exhaust valve 47 is prevented from rotating by a deflection plate 55 that is integrally attached to the lid portion 8 of the sealed container 2 by a screw 54. The liquid discharge port opening / closing valve 6 that opens and closes the liquid discharge port 17 is attached to a bifurcated portion at the lower end of the power transmission shaft 46. The liquid discharge port on / off valve 6 is composed of a liquid discharge port on / off valve body 33 and a valve body mounting shaft 35 parallel to the swing shaft 21 that rotatably attaches the ball center of the liquid discharge port on / off valve body 33 to the power transmission shaft 46. Is done. The liquid discharge port opening / closing valve body 33 is formed in a drain valve seat 37 attached to the inner end of the sealed container 2 of the liquid discharge port 17 and opens and closes the drain valve port 36. When the exhaust valve 47 is opened and the air supply valve 53 is closed, the liquid discharge port on / off valve 6 is closed. When the exhaust valve 47 is closed and the air supply valve 53 is opened, the liquid discharge port on / off valve 6 is opened. An inflow side check valve port 56 is formed at the end of the liquid inlet 16 on the side of the sealed container 2, and an inflow side check valve 57 that opens the inflow side check valve port 56 toward the inside of the sealed container 2 is the sealed container 2. Is attached to the lid portion 8.

  Next, the operation of the liquid pumping apparatus 1 of this embodiment will be described. The external piping of the liquid pumping apparatus 1 has a working steam inlet 11 connected to a high-pressure steam source, a working steam outlet 13 connected to the liquid generation source side, a liquid inlet 16 connected to the liquid generation source, and a liquid The discharge port 17 is connected to the liquid pumping destination. In a state where the liquid level in the hermetic container 2 is low, the float 3 is located at the bottom, and the third shaft 31 and the transmission shaft mounting shaft 45 are respectively displaced downward. Therefore, the power transmission shaft 46 is displaced downward. At this time, the supply valve 53 closes the supply valve port 50, and the exhaust valve 47 opens the exhaust valve port 51. The inflow side check valve 57 opens the inflow side check valve port 56, and the liquid discharge port opening / closing valve 6 closes the liquid discharge port 17. When the liquid on the liquid source side flows and accumulates in the sealed container 2 from the liquid inlet 16, and the float 3 rises due to the rise in the liquid level in the sealed container 2, the float arm 22 rotates clockwise about the swing shaft 21. The first shaft 24, which is a connecting portion with the coil spring 26, moves upward and approaches the extension line of the line connecting the swing shaft 21 and the second shaft 25, and the coil spring 26 is compressed and deformed. When the float 3 further floats and the first shaft 24 moves above the extension of the line connecting the swing shaft 21 and the second shaft 25, the coil spring 26 suddenly recovers from deformation, and the sub arm 23 Rotates counterclockwise, and the transmission shaft mounting shaft 45 snaps upward. As a result, the exhaust valve 47 is moved upward via the power transmission shaft 46 connected to the transmission shaft mounting shaft 45 to close the exhaust valve port 51, and the air supply valve 53 is moved upward in the upward movement process of the exhaust valve 47. Then, the air supply valve port 50 is opened, and the liquid discharge port opening / closing valve 6 opens the liquid discharge port 17. When the exhaust valve port 51 is closed, the air supply valve port 50 is opened, and the liquid discharge port 17 is opened, high-pressure steam is introduced into the sealed container 2 from the working steam inlet 9, and the pressure in the sealed container 2 is reduced. To rise. Thereby, the inflow side check valve 57 closes the inflow side check valve port 56 and pumps the liquid accumulated in the sealed container 2 from the liquid discharge port 17 to the liquid pressure destination.

  As a result of the liquid being pumped, when the liquid level in the sealed container 2 is lowered and the float 3 is lowered, the float arm 22 rotates counterclockwise about the swing shaft 21 and is a connecting portion with the coil spring 26. The first shaft 24 moves downward to approach the extended line connecting the swing shaft 21 and the second shaft 25, and the coil spring 26 is compressed and deformed. When the float 3 further descends and the first shaft 24 moves below the extension of the line connecting the swing shaft 21 and the second shaft 25, the coil spring 26 suddenly recovers from deformation, and the sub arm 23 Rotates clockwise and the transmission shaft mounting shaft 45 snaps downward. As a result, the exhaust valve 47 moves down through the power transmission shaft 46 connected to the transmission shaft mounting shaft 45, opens the exhaust valve port 51, and the supply valve 53 moves down in the downward movement process of the exhaust valve 47. Then, the air supply valve port 50 is closed, and the liquid discharge port opening / closing valve 6 closes the liquid discharge port 17. When the exhaust valve port 51 is opened, the air supply valve port 50 is closed, and the liquid discharge port 17 is closed, the high-pressure steam in the sealed container 2 is discharged from the working vapor discharge port 13 to the liquid generation source side, and the sealed container The pressure in 2 decreases. As a result, the inflow side check valve 57 opens the inflow side check valve port 56, and the liquid again flows down and accumulates in the sealed container 2.

  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 on-off valve 10 Liquid reservoir space 11 Working steam inlet 13 Working steam outlet 16 Liquid inlet 17 Liquid outlet 21 Oscillating shaft 22 Float arm 23 Sub-arm 24 First shaft 25 Second shaft 26 Coil spring 46 Power transmission shaft 47 Exhaust valve 53 Air supply valve 57 Inflow check 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, an exhaust valve is provided at the working steam outlet, and a liquid inlet Is provided with an inflow check valve that allows only the flow of liquid to the sealed container. A float and a snap mechanism are incorporated in the sealed container. The snap mechanism includes a swing shaft supported in the sealed container and a swing shaft. A float arm and a sub arm that rotate around a moving axis, a first shaft supported by the float arm, a second shaft supported by the sub arm, and a first shaft and a second shaft. The float 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 snap transmission mechanism is operated to snap the power transmission shaft as the float moves up and down. By moving the air supply valve Switch the open / close of the exhaust valve, first open the exhaust valve and close 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 to enter the closed container In a liquid pumping device that pumps the accumulated liquid from the liquid discharge port to the liquid pumping destination, when the liquid discharge port opening / closing valve that opens and closes the liquid discharge port is connected to the power transmission shaft, the exhaust valve is opened, and the air supply valve is closed A liquid pumping device characterized by closing a liquid discharge port on-off valve and opening the liquid discharge port on-off valve when the exhaust valve is closed and the air supply valve is opened.

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