JP2008223713A - Liquid pressure-feeding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid pressure-feeding device with a simple structure by reducing the number of parts. <P>SOLUTION: An operation fluid introduction port 11 and an operation fluid discharge port 13, and a liquid flowing-in port 16 and a liquid discharge port 17 are provided on a sealed container 2, and a float 3, a switch valve 4 and a snap mechanism 5 are built in the sealingly closed vessel 2. The snap mechanism 5 has a pivot shaft 21 supported in the sealed container 2; a float arm 22 and a sub-arm 23 rotated around the pivot shaft 21; a first shaft 24 supported on the float arm 22; a second shaft 25 supported on the sub-arm 23; and a spring 26 mounted between the first and second shafts 24, 25. The float 3 is connected to the float arm 22, and the switch valve 4 is connected to the sub-arm 23 through a motive power transmission shaft 46. The mounted part 30 fixed to the float 3 is connected to the first shaft 24. <P>COPYRIGHT: (C)2008,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.

  In a conventional liquid pumping device, a closed container is provided with a working fluid inlet, a working fluid outlet, a liquid inlet and a liquid outlet, and a float, a switching valve and a snap mechanism are built in the sealed container. An oscillating shaft supported in the sealed container, a float arm and a sub arm rotating around the oscillating shaft, a first shaft supported by the float arm, and a second shaft supported by the sub arm In a liquid pumping device having a spring attached between the first and second shafts, the float being connected to the float arm, and the switching valve being connected to the sub arm via the power transmission shaft, it is fixed to the float The attachment portion is connected to the tip of the float arm, and although not disclosed in detail, the attachment portion fixed to the float is connected with a bolt that is screwed to the tip of the float arm.

The conventional liquid pumping device is such that the attachment portion fixed to the float is connected to the tip of the float arm with a bolt that is screw-coupled. Therefore, a bolt as a connector is required to connect the float to the float arm. To do. Therefore, there is a problem that the number of parts is large and the structure is complicated.
JP-A-8-114175

  The problem to be solved is to provide a liquid pumping device having a simple structure with a reduced number of parts.

  In the present invention, a closed container is provided with a working fluid inlet, a working fluid outlet, a liquid inlet and a liquid outlet, and a float, a switching valve and a snap mechanism are built in the sealed container. A swing shaft supported by the swing arm, a float arm and a sub arm rotating around the swing shaft, a first shaft supported by the float arm, a second shaft supported by the sub arm, and a first shaft And a spring attached between the second shaft, the float is connected to the float arm, and the switching valve is connected to the sub arm via the power transmission shaft, the attachment fixed to the float The portion is connected to the first shaft.

  In the liquid pressure feeding device of the present invention, the attachment portion of the float is connected to the first shaft which is the connection portion between the float arm and the spring. Therefore, the 1st axis | shaft can serve as the connection part to the float arm of a float. Therefore, the liquid pumping apparatus of the present invention produces an excellent effect that the number of parts can be reduced and the structure can be simplified.

  In the present invention, since the attachment portion fixed to the float is connected to the first shaft, the first shaft which is the connection portion between the float arm and the spring is the connection portion of the attachment portion of the float to the float arm. Can also serve. In this way, since a connecting tool for connecting the float to the float arm is not required separately, the number of parts can be reduced and a liquid pumping device having a simple structure can be provided.

  An embodiment showing a specific example of the above technical means will be described. 1 is a cross-sectional view of a liquid pumping apparatus according to an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of a snap mechanism portion of FIG. 1 joined with an AA line, and FIG. 3 is a cross-sectional view of the AA line of FIG. is there. 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 drain 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 fluid introduction port 11, a working fluid discharge port 13, a liquid inflow port 16, and a liquid discharge port 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 closed container 2 by a bracket 27. The bracket 27 is composed of two plates, and each plate is integrally attached to the lid portion 8 of the sealed container 2 by screws (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.

  The drainage valve 6 includes a third shaft 31 supported by the float arm 22, a drainage valve arm 32 attached to the third shaft 31, a liquid attached to the drainage valve arm 32, and the liquid inside the sealed container 2. The drain valve body 33 is configured to cut off communication between the discharge ports 17. The third shaft 31 extends over the float arm 22 in parallel with the swing shaft 21 and is located between the swing shaft 21 and the second shaft 25. An upper end of the drain valve arm 32 is rotatably attached to the third shaft 31. A window 34 is opened in the sub arm 23 so as not to hinder the movement of the third shaft 31. The drain valve arm 32 is composed of two plates, and a valve body mounting shaft 35 parallel to the swing shaft 21 is spanned on the lower end, and the drain valve body for opening and closing the drain valve port 36 on the valve body mounting shaft 35. 33 ball centers are rotatably supported. The drainage valve port 36 is formed in a drainage valve seat 37 attached to the inner end of the sealed container 2 of the liquid discharge port 17.

  The drain valve arm 32 is provided with a contact portion 38 that protrudes to the left, and a bolt-shaped adjustment member 39 is attached to the contact portion 38 by screw connection. When the drain valve body 33 closes the drain valve port 35, the float arm 22 contacts the contact portion 38 of the drain valve arm 32 via the adjustment member 39, and the adjustment member 39 and the drain valve arm 32 are connected. The drainage valve element 33 can be pressed against the drainage valve port 35. When the drainage valve element 33 closes the drainage valve port 35 by adjusting the screwing amount of the adjustment member 39 into the contact portion 38, the float arm 22 is interposed via the regulation member 39 and the drainage valve arm 32. The drain valve body 33 can be reliably pressed against the drain valve port 35. Since the float arm 22 abuts on the adjustment member 39, the rotation of the float arm 22 in the counterclockwise direction is restricted, so that the adjustment member 39 serves as a lower limit stopper for the float arm 22.

  A stopper shaft 40 is stretched over the bracket 27 to the lower right of the swing shaft 21, and the stopper shaft 40 is supported in the sealed container 2 by the bracket 27. 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 the lower end 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 body 47 whose lower end is connected to the power transmission shaft 46, an air supply / exhaust case 48 in which the exhaust valve body 47 is accommodated except for the lower part of the exhaust valve body 47, and an air supply valve body 53. It consists of. A small-diameter operation rod 49 is integrally formed at the upper end of the exhaust valve body 47. An air supply valve port 50 of the working fluid introduction port 11 is formed in the air supply / exhaust case 48 attached to the lid portion 8 of the hermetic container 2 by screws (not shown), and the working fluid discharge is formed on the side below the air 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 body 47. A spherical air supply valve body 53 for opening and closing the air supply valve opening 50 is disposed on the side of the working fluid introduction port 11 of the air supply valve opening 50, and the air supply valve body 53 is opened by an operation rod 49 of the exhaust valve body 47. Is done. Since the shoulder portion 52 of the exhaust valve body 47 closes the exhaust valve port 51, the rotation of the sub arm 23 in the counterclockwise direction is restricted, so the shoulder portion 52 of the exhaust valve body 47 becomes the upper limit stopper of the sub arm 23. It becomes. The exhaust valve body 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.

  An inflow side check valve port 56 is formed at the end of the liquid inlet 16 on the closed container 2 side, and an inflow side check valve body 57 that opens the inflow side check valve port 56 toward the inside of the sealed container 2 is a sealed container. 2 to the lid 8. A drain check valve 58 is formed at the end of the drain valve seat 37 on the liquid discharge port 17 side, and a discharge check valve body 59 that opens the discharge check valve 58 toward the liquid discharge port 17 is discharged. It is attached to the liquid valve seat 37.

  Next, the operation of the liquid pumping apparatus 1 of this embodiment will be described by following a series of operation procedures when steam is used as the working fluid. The external piping of the liquid pumping device 1 has a working fluid inlet 11 connected to a high-pressure vapor source, a working fluid 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 drain valve arm 32 and the power transmission shaft 46 are displaced downward. At this time, the drain valve body 33 closes the drain valve port 36, the supply valve body 53 closes the supply valve port 50, and the exhaust valve body 47 opens the exhaust valve port 51. The inflow side check valve body 57 opens the inflow side check valve port 56, and the discharge side check valve body 59 closes the discharge side check valve port 58. 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 third shaft 31 moves up, and the drain valve arm 32 moves up. By the upward movement of the drain valve arm 32, the drain valve body 33 is rotated and moved upward to open the drain valve port 36.

  On the other hand, on the snap mechanism 5 side, when the float arm 22 rotates in the clockwise direction around the swing shaft 21, the first shaft 24, which is a connecting portion with the coil spring 26, moves upward to move the swing shaft 21 and the second shaft. The coil spring 26 is compressed and deformed as it approaches the extension line of the line connecting the shafts 25. 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 body 47 moves upward via the power transmission shaft 46 connected to the transmission shaft mounting shaft 45, closes the exhaust valve port 51, and the intake valve body 53 in the upward movement process of the exhaust valve body 47. To open the air supply valve port 50.

  When the exhaust valve port 51 is closed and the air supply valve port 50 is opened, high-pressure steam is introduced into the sealed container 2 from the working fluid introduction port 9, and the pressure in the sealed container 2 increases. As a result, the inflow side check valve body 57 closes the inflow side check valve port 56, the discharge side check valve body 59 opens the discharge side check valve port 58, and the liquid accumulated in the sealed container 2 is drained. It pumps from the outlet 17 to the liquid pumping 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 the third shaft 31 moves downward. As a result, the drain valve arm 32 moves downward. Due to the downward movement of the drain valve arm 32, the drain valve body 33 moves downward while rotating to close the drain valve port 36.

  On the other hand, on the snap mechanism 5 side, when the float arm 22 rotates counterclockwise about the swing shaft 21, the first shaft 24, which is a connecting portion with the coil spring 26, moves downward to move the swing shaft 21 and the first shaft. The coil spring 26 is compressed and deformed by approaching an extension of the line connecting the two shafts 25. 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 body 47 is moved downward through the power transmission shaft 46 connected to the transmission shaft mounting shaft 45 to open the exhaust valve port 51, and the supply valve body 53 in the downward movement process of the exhaust valve body 47. Moves downward and closes the air supply valve port 50.

  When the exhaust valve port 51 is opened and the air supply valve port 50 is closed, the high-pressure steam in the sealed container 2 is discharged from the working fluid discharge port 13 to the liquid generation source side, and the pressure in the sealed container 2 decreases. Thereby, the inflow side check valve body 57 opens the inflow side check valve port 56, and the discharge side check valve body 59 closes the discharge side check valve port 58. As a result, the liquid again flows down and accumulates in the sealed container 2.

Sectional drawing of the liquid pumping apparatus of the Example of this invention. The expanded sectional view of the snap mechanism part of FIG. 1 which joined the AA line. FIG. 3 is a sectional view taken along line AA in FIG. 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid pumping apparatus 2 Airtight container 3 Float 4 Switching valve 5 Snap mechanism 7 Main body part 8 Lid part 10 Liquid storage space 11 Working fluid inlet 13 Working fluid 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 30 Mounting portion 46 Power transmission shaft

Claims (1)

The sealed container is provided with a working fluid inlet, a working fluid outlet, a liquid inlet and a liquid outlet, and a float, a switching valve and a snap mechanism are built in the sealed container, and the snap mechanism is supported in the sealed container. A swing shaft, a float arm and a sub arm rotating around the swing shaft, a first shaft supported by the float arm, a second shaft supported by the sub arm, and first and second In a liquid pumping device having a spring attached between shafts, a float connected to a float arm, and a switching valve connected to a sub arm via a power transmission shaft, the attachment portion fixed to the float is the first. A liquid pumping device characterized by being connected to the shaft.

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