JP2013108527A - Liquid pumping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid pumping device sending the condensate generated in various kinds of steam using devices to a boiler and waste heat using places, and having high exhaust capability.SOLUTION: An air supply valve 20 is provided in a working fluid introduction port 11, an exhaust valve 21a is provided in a working fluid discharge port 13a, and a second exhaust valve 21b is provided in a second working fluid discharge port 13b. By operating a snap mechanism 5 utilizing a coil spring 38 according to rise and fall of a float 3 arranged in a closed container 2, a power transmission shaft 28 is moved in a snap manner to switch open and close of the air supply valve 20, the exhaust valve 21a and the second exhaust valve 21b via the power transmission shaft 28. A lever 27, which swings around a valve swinging shaft 18 supported in the closed container 2 according to the snap movement of the power transmission shaft 28, is supported rotatably on the power transmission shaft 28. Open and close of the air supply valve 20, the exhaust valve 21a and the second exhaust valve 21b are switched via the lever 27 according to the snap movement of the power transmission shaft 28, and force of the snap movement of the power transmission shaft 28 is increased by the lever 27 and is transmitted to the air supply valve 20, the exhaust valve 21a and the second exhaust valve 21b.

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 container is provided with a working fluid inlet, a working fluid outlet, a liquid inlet and a liquid outlet, a supply valve is provided at the working fluid inlet, and an exhaust valve is provided at the working fluid 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. By operating a snap mechanism using a spring according to the raising and lowering of the float arranged in the container and moving the power transmission shaft by snapping, the supply valve and the exhaust valve are switched between opening and closing via the power transmission shaft, First, the exhaust valve is opened and the air supply valve is closed to allow the liquid to flow into the sealed container via the inflow side check valve, and then the liquid accumulated in the sealed container is closed by closing the exhaust valve and opening the air supply valve. Pumped to liquid destination via pressure check valve A lever that swings around a valve swing shaft supported in the sealed container according to the snap movement of the power transmission shaft is rotatably supported by the power transmission shaft, and the lever according to the snap movement of the power transmission shaft By switching between opening and closing of the air supply valve and the exhaust valve via the valve, the force of snap movement of the power transmission shaft is expanded by the lever and transmitted to the air supply valve and the exhaust valve.

JP 2010-185553 A

  The above-mentioned conventional liquid pumping device can switch the supply valve and the exhaust valve on and off reliably by expanding the force of the snap movement of the power transmission shaft with the lever and transmitting it to the supply valve and the exhaust valve. The liquid can be pumped well. However, since only one exhaust valve is opened and closed, the exhaust capability is low, leaving room for improvement.

  Therefore, the problem to be solved by the present invention is to provide a liquid pumping device having a high exhaust capacity.

  In order to solve the above problems, the liquid pressure feeding device of the present invention is provided with a working fluid introduction port, a working fluid discharge port, a second working fluid discharge port, a liquid inlet and a liquid discharge port in a sealed container, An intake valve is provided at the inlet, an exhaust valve is provided at the working fluid discharge port, a second exhaust valve is provided at the second working fluid discharge port, and only liquid flow to the sealed container is allowed at the liquid inlet. An inflow check valve is provided, and a pressure check valve that allows only the flow of fluid to the liquid discharge destination is provided at the liquid discharge port, and a spring is provided according to the rise and fall of the float disposed in the sealed container. By operating the snap mechanism utilized to snap the power transmission shaft, the supply valve, the exhaust valve, and the second exhaust valve are opened and closed via the power transmission shaft, and the exhaust valve and the second exhaust valve are firstly switched. Open the check valve by closing the air supply valve. Then, the liquid is allowed to flow into the sealed container, and then the exhaust valve and the second exhaust valve are closed and the air supply valve is opened, so that the liquid accumulated in the sealed container is pumped to the liquid pumping destination via the pressure check valve. A lever that swings around a valve swing shaft supported in the sealed container according to the snap movement of the power transmission shaft is rotatably supported by the power transmission shaft, and the lever according to the snap movement of the power transmission shaft By switching between opening and closing of the air supply valve, the exhaust valve, and the second exhaust valve through the lever, the force of snap movement of the power transmission shaft is expanded by the lever and transmitted to the air supply valve, the exhaust valve, and the second exhaust valve. It is a feature.

  According to the present invention, the lever that swings about the valve swing shaft supported in the hermetic container according to the snap movement of the power transmission shaft is rotatably supported by the power transmission shaft, and the power transmission shaft snaps. By switching the opening and closing of the air supply valve, the exhaust valve and the second exhaust valve via the lever according to the movement, the force of the snap movement of the power transmission shaft is expanded by the lever, and the air supply valve, the exhaust valve and the second exhaust valve Therefore, there is an effect that it is possible to provide a liquid pumping device having a high exhaust capability.

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 has a float 3, a switching valve 4, and a snap mechanism 5 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 fluid introduction port 11, a working fluid discharge port 13 a, a second working fluid discharge port 13 b, a liquid inflow port 16, and a liquid discharge port 17. An air supply valve 20 is attached to the inside of the working fluid introduction port 11, an exhaust valve 21a is attached to the inside of the working fluid discharge port 13a, and a second exhaust valve 21b is attached to the inside of the working fluid discharge port 13b. 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 tip of the valve case 22 of the air supply valve 20 is screwed into the working fluid inlet 11. The valve body 23 is spherical and is on the working fluid inlet 11 side, and is opened and closed when the upper end of the elevating rod 24 abuts. 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 lever 27. The left end portion of the lever 27 is supported by the lid portion 8 via the valve swing shaft 18 and swings up and down around the valve swing shaft 18. The right end of the lever 27 is rotatably supported by the power transmission shaft 28 via the fulcrum shaft 19, and the power transmission shaft 28 is connected to the snap mechanism 5. The exhaust valve 21a includes a valve case 29a, a valve body 30a, and an elevating rod 31a. The valve case 29a has a through hole in the axial direction, and has a valve seat 32a inside the through hole. The valve body 30a held and fixed to the upper end of the elevating rod 31a from below the valve seat 32a contacts and opens and closes. Is. The lower end of the lifting bar 31 a is connected to the lever 27. The second exhaust valve 21b is composed of a second valve case 29b, a second valve body 30b, and a second lifting rod 31b. The second valve case 29b has a through hole in the axial direction, a second valve seat 32b is provided inside the through hole, and the second valve case 29b is held and fixed from the bottom of the second valve seat 32b to the upper end of the second elevating rod 31b. The valve body 30b contacts and opens and closes. The lower end of the second elevating bar 31 b is connected to the lever 27. The distance between the valve swing shaft 18 and the lower end of the lift rod 24 of the air supply valve 20, the distance between the valve swing shaft 18 and the lower end of the lift rod 31a of the exhaust valve 21a, and the valve swing shaft 18 and the lower end of the second elevating rod 31b of the second exhaust valve 21b are formed to be shorter than the distance between the valve swing shaft 18 and the fulcrum shaft 19. The switching valve 4 is constituted by the air supply valve 20, the exhaust valve 21a and the second exhaust valve 21b. When the air supply valve 20 is opened, the exhaust valve 21a and the second exhaust valve 21b are closed, and when the air supply valve 20 is closed, the exhaust valve is closed. 21a and the second exhaust valve 21b are opened.

 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 float arm 34, a sub arm 37, and a coil spring 38 in a compressed state. 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 that is parallel to the swing shaft 35 is attached to the right end of the sub arm 37 so as to pass therethrough, and the lower end of the power transmission shaft 28 is connected to the connecting shaft 45. Stopper shafts 51 and 52 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 operation of the liquid pumping apparatus 1 is as follows. First, in the external piping of the liquid pumping apparatus 1, the working fluid introduction port 11 is connected to a high pressure fluid source, and the working fluid discharge port 13a and the second working fluid discharge port 13b are connected to the fluid circulation piping. The liquid inlet 16 is connected to a load such as a steam using device via an inflow check valve that opens from the outside toward the sealed container 2, and the liquid outlet 17 is a pressure-feed-side check that opens from the sealed container 2 to the outside. It is connected to a liquid pumping destination such as a boiler through a valve. 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. At this time, the air supply valve 20 in the switching valve 4 is closed, and the exhaust valve 21a and the second exhaust valve 21b are opened. In addition, the inflow check valve is opened and the pressure check valve 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 due to the water head pressure, 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 coupled to the coupling shaft 45 snaps upward, the lever 27 rotates counterclockwise about the valve swing shaft 18, and the air supply valve 20 is opened and exhausted. The valve 21a and the second exhaust valve 21b are closed. When the air supply valve 20 is opened and the exhaust valve 21a and the second exhaust valve 21b are closed, the working fluid is introduced into the sealed container 2 from the working fluid introduction port 11, the internal pressure rises, and the inflow side check valve Is closed and the pressure check valve is opened. Condensate collected in the liquid storage space 10 is pushed by the fluid pressure and discharged from the liquid discharge port 17 to an external boiler or waste heat utilization device via the pressure-feed-side check valve.

  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 lever 27 rotates clockwise about the valve swing shaft 18, the air supply valve 20 is closed and the exhaust is exhausted. The valve 21a and the second exhaust valve 21b are opened. When the air supply valve 20 is closed and the exhaust valve 21a and the second exhaust valve 21b are opened, the pressure-feed side check valve is closed and the inflow side check valve is opened.

  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 10 Liquid reservoir space 11 Working fluid inlet 13a Working fluid outlet 13b Second working fluid outlet 16 Liquid inlet 17 Liquid outlet 18 Valve swing axis 19 fulcrum shaft 20 air supply valve 21a exhaust valve 21b second exhaust valve 27 lever 28 power transmission shaft

Claims (1)

  The closed container is provided with a working fluid inlet, a working fluid outlet, a second working fluid outlet, a liquid inlet and a liquid outlet, a supply valve is provided at the working fluid inlet, and an exhaust valve is provided at the working fluid outlet. A second exhaust valve is provided at the second working fluid discharge port, an inflow check valve that allows only the flow of liquid to the sealed container is provided at the liquid inlet, and a liquid pressure destination is provided at the liquid discharge port. A pressure check valve that allows only the flow of fluid to the valve is provided, and a snap mechanism using a spring is operated to snap the power transmission shaft in response to the lifting and lowering of the float arranged in the sealed container. The opening and closing of the supply valve, the exhaust valve and the second exhaust valve are switched via the power transmission shaft, and the exhaust valve and the second exhaust valve are first opened and the supply valve is closed, so that the supply valve is closed. Let the liquid flow into the sealed container, then the exhaust valve and By closing the exhaust valve and opening the air supply valve, the liquid accumulated in the sealed container was pumped to the liquid pumping destination via the pressure-feed-side check valve, and supported in the sealed container according to the snap movement of the power transmission shaft. A lever that swings about a valve swing shaft is rotatably supported by the power transmission shaft, and the supply valve, the exhaust valve, and the second exhaust valve are opened and closed via the lever according to the snap movement of the power transmission shaft. A liquid pressure feeding device characterized in that, by switching, the force of snap movement of the power transmission shaft is expanded by a lever and transmitted to an air supply valve, an exhaust valve, and a second exhaust valve.

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