JP5937915B2 - Liquid pumping device - Google Patents

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.

The conventional liquid pumping device is provided with a working fluid inlet, a working fluid outlet, a liquid inlet and a liquid outlet in a sealed container. A float and a switching valve are built in the sealed container, and operate according to the rise and fall of the float. Switch the supply valve body of the switching valve that opens and closes the air supply valve port of the fluid introduction port and the exhaust valve body of the switching valve that opens and closes the exhaust valve port of the working fluid discharge port, and first open the exhaust valve port and supply In the liquid pressure feeding device that closes the air valve port and allows liquid to flow in from the liquid inlet, then closes the exhaust valve port and opens the air supply valve port to pump the liquid accumulated in the sealed container from the liquid discharge port. A deflecting plate oriented in the horizontal direction is arranged on the inner side of the closed container of the mouth.

JP 2008-249055 A

In the conventional liquid pumping device, the vapor as the working fluid ejected from the air supply valve port collides with the deflecting plate and then comes into contact with the liquid in the sealed container so that the vapor reaches the deep part of the liquid. Since the vapor condensation can be reduced by preventing the pressure, the pressure in the sealed container can be quickly increased. However, since the tip of the deflecting plate is directed horizontally, there is a problem that the flow velocity when the vapor reaches the liquid surface is relatively large.

Therefore, the problem to be solved by the present invention is to provide a liquid pumping device that can reduce the flow velocity when the working fluid reaches the liquid level.

In order to solve the above problems, in the liquid pumping apparatus of 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 and a switching valve are provided in the sealed container. Built-in switch between opening and closing the supply valve body of the switching valve that opens and closes the supply valve port of the working fluid inlet and the exhaust valve body of the switching valve that opens and closes the exhaust valve port of the working fluid discharge port according to the lift of the float First, the exhaust valve port is opened and the air supply valve port is closed to allow liquid to flow in from the liquid inlet, then the exhaust valve port is closed and the air supply valve port is opened to collect the liquid accumulated in the sealed container from the liquid discharge port. A liquid pumping device for pumping, in which a deflecting plate oriented in the horizontal direction is arranged on the inner side of the airtight container of the air supply valve port, an upwardly directed portion is provided obliquely upward at the tip of the deflecting plate It is characterized by that.

According to the present invention, since the upward portion directed obliquely upward is provided at the tip of the deflection plate, the flow rate when the working fluid reaches the liquid level can be reduced, so that the pressure in the sealed container can be quickly increased. This produces an excellent effect of increasing the liquid pumping ability.

It is sectional drawing of the liquid pumping apparatus concerning embodiment of this invention. It is an expanded sectional view of the switching valve part of FIG. It is the sectional view on the AA line of FIG.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3. 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 drainage 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 sealed container 2 by a bracket (not shown) that is integrally attached to the lid portion 8 of the sealed container 2. 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 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 is rotatably supported on the second shaft 25. A compressed coil spring 26 is disposed between the first and second spring receivers.

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 36, the float arm 22 contacts the contact portion 38 of the drain valve arm 32 through the adjustment member 39, and the adjustment member 39 and the drain valve arm 32 are connected to each other. The drainage valve element 33 can be pressed against the drainage valve port 36. When the drainage valve element 33 closes the drainage valve port 36 by adjusting the screwing amount of the adjustment member 39 into the contact portion 38, the float arm 22 moves through the regulation member 39 and the drainage valve arm 32. The drain valve body 33 can be reliably pressed against the drain valve port 36. Since the drain valve body 33 closes the drain valve port 36, the rotation of the float arm 22 in the counterclockwise direction is restricted, so that the drain valve seat 37 serves as a lower limit stopper for the float arm 22. 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 the lower portion of the power transmission shaft 46 is rotatably connected to the transmission shaft mounting shaft 45. The upper part of the power transmission shaft 46 is connected to the switching valve 4. A pin 60 penetrating the power transmission shaft 46 is provided on the upper portion of the power transmission shaft 46. A two-sided width portion 61 having a plane substantially equal to the outer diameter of the upper portion of the power transmission shaft 46 is formed from the middle portion to the lower end of the exhaust valve body 47 of the switching valve 4, and the power is transmitted to the lower end of the two-sided width portion 61. An insertion hole 62 having a diameter larger than the outer diameter of the upper portion of the shaft 46 and smaller than the length of the pin 60 is formed, and a holding hole 63 having a diameter larger than the length of the pin 60 is continuously formed on the insertion hole 62. ing. A deflecting plate 55 that is horizontally directed to the inside of the airtight valve 2 of the air supply valve port 50 is integrally attached to the lid portion 8 of the airtight container 2 by a screw 54. The rotation of the exhaust valve body 47 is prevented by fitting the two-surface width portion 61 of the exhaust valve body 47 to each other. An upward portion 65 directed obliquely upward is provided at the tip of the bifurcated portion 64 of the deflection plate 55. The exhaust valve element 47 is inserted into the holding hole 63 from the insertion hole 62 in a state where the surface of the two-sided width portion 61 is substantially orthogonal to the axis of the pin 60, and the exhaust valve body 47 is approximately 90 degrees around the axis of the power transmission shaft 46. After rotating and holding the pin 60 in the holding hole 63, the two-sided width portion 61 is fitted between the forked portion 64 of the deflection plate 55. Thereby, the deflection plate 55 can also serve as a preventing member for preventing the exhaust valve body 47 from rotating and preventing the pin 60 and the exhaust valve body 47 from coming out of the power transmission shaft 46. The switching valve 4 includes an exhaust valve body 47, an air supply / exhaust case 48 in which the exhaust valve body 47 is accommodated except for a lower portion of the exhaust valve body 47, and an air supply valve body 53. 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 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 that the air supply / exhaust case 48 serves as the upper limit stopper of the sub arm 23.

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 11. When the steam as the working fluid ejected from the air supply valve port 50 collides with the deflecting plate and is caused to flow obliquely upward by the upward portion 65 of the deflecting plate 55, the steam reaches the liquid level. The flow rate can be reduced, and the pressure in the sealed container 2 can be quickly increased. 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.

INDUSTRIAL APPLICABILITY The present invention can be used for a liquid pumping 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 7 Main body part 8 Lid part 10 Liquid reservoir space 11 Working fluid inlet 13 Working fluid outlet 16 Liquid inlet 17 Liquid outlet 46 Power transmission shaft 47 Exhaust valve Body 50 Air supply valve port 51 Exhaust valve port 53 Air supply valve body 53 Air supply valve body 55 Deflection plate 60 Pin 61 Width across flat part 62 Insertion hole 63 Holding hole 64 Fork part 65 Upward part

Claims (1)

The sealed container is provided with a working fluid inlet, a working fluid outlet, a liquid inlet and a liquid outlet. A float and a switching valve are built in the sealed container, and an air supply valve for the working fluid inlet according to the rising and lowering of the float. Open and close the supply valve body of the switching valve that opens and closes the opening and closing of the exhaust valve body of the switching valve that opens and closes the exhaust valve opening of the working fluid discharge port, first open the exhaust valve opening and close the supply valve opening and liquid A liquid pumping device that allows liquid to flow in from an inflow port, then closes the exhaust valve port and opens the air supply valve port to pump the liquid accumulated in the sealed container from the liquid discharge port. What is claimed is: 1. A liquid pumping apparatus comprising: a deflecting plate oriented in a horizontal direction on the side, wherein an upward portion directed obliquely upward is provided at a tip of the deflecting plate.

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