JP5138350B2 - 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.

  In a conventional liquid pumping device, a 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. An inflow check valve that allows only liquid flow to the sealed container at the liquid inlet, and a pressure check valve that allows only liquid flow to the liquid discharge destination at the liquid discharge port. By switching the power supply shaft and the exhaust valve connected to the power transmission shaft by switching the power transmission shaft by snapping the power transmission shaft by operating the snap mechanism according to the rise and fall of the float arranged in the closed container First, the exhaust valve is opened, the working steam discharge port is opened, the supply valve is closed, and the working steam introduction port is closed, so that the liquid flows into the sealed container through the inflow side check valve, and then the exhaust valve. Closes the working steam outlet and closes the air supply valve It is intended for pumping the liquid pumping destination liquid collected in the sealed container via a pumping side check valve by opening the working steam inlet port open.

The above-mentioned conventional liquid pumping device has a closed container because the condensate in the sealed container re-evaporates when the exhaust valve is opened, the working steam discharge port is opened, the supply valve is closed, and the working steam introduction port is closed. There was a problem that it took time to exhaust the steam inside, and the inflow of the liquid into the sealed container was slow because the opening of the inflow check valve was delayed. If the flow of the liquid into the sealed container is slow, the liquid pumping capacity per unit time becomes small.
JP-A-8-145290

  The problem to be solved is to prevent the re-evaporation of the condensate in the sealed container when the exhaust valve is opened, the working steam discharge port is opened, the supply valve is closed, and the working steam introduction port is closed. It is an object of the present invention to provide a liquid pumping device that can quickly open a side check valve.

In the present invention, 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 inflow 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 liquid to the liquid discharge destination is provided at the liquid discharge port, By operating the snap mechanism in response to the lifting and lowering of the float arranged in the sealed container and snapping the power transmission shaft, the supply valve and exhaust valve connected to the power transmission shaft are switched between opening and closing. Open the exhaust valve, open the working steam discharge port, close the air supply valve and close the working steam inlet port to allow liquid to flow into the sealed container via the inflow check valve, then close the exhaust valve Operates by closing the operating steam outlet and opening the supply valve In the liquid pumping device for pumping the liquid pumping destination via the pressure side check valve liquid collected in the sealed vessel by opening the air inlet, the left and right exhaust valve a shoulder provided, one of the exhaust valve Open and close the working steam outlet at the shoulder , provide a cooling water inlet in the sealed container, open and close the cooling water inlet at the other shoulder of the exhaust valve, open the exhaust valve and open the working steam outlet When the supply valve is closed and the working steam inlet is closed, the cooling water inlet is opened, the exhaust valve is closed, the working steam outlet is closed, the supply valve is opened, and the working steam inlet is opened The cooling water inlet is closed.

  In the present invention, when the exhaust valve is opened, the working steam discharge port is opened, the supply valve is closed, and the working steam introduction port is closed, the inflow check valve is quickly opened, and the liquid is quickly put into the sealed container. Since it can be made to flow in, the outstanding effect that the liquid pumping capability per unit time can be enlarged is produced.

In the liquid pumping device of the present invention, the exhaust valve is provided with left and right shoulders, the working steam discharge port is opened and closed with one shoulder of the exhaust valve , the cooling water inlet is provided in the sealed container, and the cooling water inlet is Open and close with the other shoulder of the exhaust valve, open the exhaust valve to open the working steam discharge port, close the air supply valve and close the working steam inlet port, open the cooling water inlet and close the exhaust valve When the working steam discharge port is closed and the air supply valve is opened to open the working steam introduction port, the cooling water inlet is closed. Therefore, when the exhaust valve is opened, the working steam outlet is opened, the supply valve is closed, and the working steam inlet is closed, the condensate in the sealed container is re-evaporated by the cooling water injected from the cooling water inlet. Can be prevented. Therefore, the in-stream check valve can be quickly opened by exhausting the steam in the sealed container in a short time.

  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 steam inlet 11, a working steam outlet 13, a liquid inlet 16, a liquid outlet 17, and a cooling water inlet 18.

  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 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 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 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 for the operating steam inlet port 11. An exhaust valve port 51 of the outlet 13 is formed, and a cold water valve port 19 of the cooling water inlet 18 is formed on the left side below the air supply valve port 50. The exhaust valve port 51 is opened and closed by the shoulder 52 of the exhaust valve 47, and the cold water valve port 19 is opened and closed by the shoulder 20 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 and the shoulder 20 closes the cold water valve port 19, rotation of the sub arm 23 in the counterclockwise direction is restricted. 52 and the shoulder 20 serve as an upper limit stopper for 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 switching valve 4 is constituted by the supply valve 53 and the exhaust valve 47. When the supply valve 53 is opened and the working steam inlet 11 is opened, the exhaust valve 47 is closed and the working steam discharge port 13 and the cooling water inlet 18 are opened. Is closed, the supply valve 53 is closed and the working steam inlet 11 is closed, the exhaust valve 47 is opened, and the working steam discharge port 13 and the cooling water inlet 18 are opened.

  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. 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, and the cooling water injection port 18 is connected to the water pipe.

  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 drainage valve body 33 closes the drainage valve port 36 and closes the liquid discharge port 17, the air supply valve 53 closes the air supply valve port 50 and closes the working steam inlet 11, and the exhaust valve body 47 opens the exhaust valve port 51 and the cold water valve port 19 and opens the working steam discharge port 13 and the cooling water injection port 18. 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 is moved upward via the power transmission shaft 46 connected to the transmission shaft mounting shaft 45, the exhaust valve port 51 and the cold water valve port 19 are closed, and the working steam discharge port 13 and the cooling water injection port are closed. 18 is closed, and the supply valve body 53 is moved upward in the process of upward movement of the exhaust valve body 47 to open the supply valve port 50 and open the working steam introduction port 11.

  When the exhaust valve port 51 and the cold water valve port 19 are closed and the air supply valve port 50 is opened, high-pressure steam is introduced into the sealed container 2 from the working steam inlet 11, and the pressure in the sealed container 2 rises. 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 and close the liquid discharge port 17.

  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 moves down via the power transmission shaft 46 connected to the transmission shaft mounting shaft 45, opens the exhaust valve port 51 and the cold water valve port 19, and operates the steam discharge port 13 and the cooling water injection port. 18, and the supply valve body 53 is moved downward in the downward movement process of the exhaust valve body 47 to close the supply valve port 50 and close the working steam introduction port 11.

  When the exhaust valve port 51 and the cold water valve port 19 are opened and the air supply valve port 50 is closed, the cooling water is injected into the sealed container 2 from the cooling water inlet 18 and the condensate in the sealed container 2 is re-evaporated. Is prevented. As a result, the vapor in the sealed container 2 is exhausted from the working vapor discharge port 13 to the liquid generation source side in a short time, and the inflow side check valve 57 quickly opens the inflow side check valve port 56 to open the liquid inflow port 16. Then, the discharge side check valve body 59 closes the discharge side check valve port 58 and closes the liquid discharge port 17. 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 cross-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 steam inlet 13 Working steam outlet 16 Liquid inlet 17 Liquid outlet 18 Cooling water inlet 19 Cooling water Valve port 46 Power transmission shaft 47 Exhaust valve 53 Air supply valve 57 Inflow side check valve 59 Pressure feed side 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 An inflow check valve that allows only the flow of liquid to the sealed container is provided, and a pressure check valve that allows only the flow of liquid to the liquid pressure destination is provided at the liquid discharge port. The power transmission shaft is snapped by operating the snap mechanism according to the rise and fall of the arranged float, thereby switching the supply valve and exhaust valve connected to the power transmission shaft to open and close, and then opening the exhaust valve first. Open the working steam discharge port, close the air supply valve and close the working steam introduction port to allow the liquid to flow into the sealed container via the inflow check valve, and then close the exhaust valve to close the working steam discharge port. Open the air supply valve and close the operating steam inlet In the liquid pumping device for pumping the liquid pumping destination via the pressure side check valve liquid collected in the sealed vessel by opening the right and left shoulder portions provided in the exhaust valve, operating in one of the shoulder portion of the exhaust valve Open and close the steam outlet, provide a cooling water inlet to the sealed container, open and close the cooling water inlet at the other shoulder of the exhaust valve, open the exhaust valve, open the working steam outlet and open the air supply valve When closed and the working steam inlet is closed, the cooling water inlet is opened.When the exhaust valve is closed, the working steam outlet is closed, the supply valve is opened, and the working steam inlet is opened, the cooling water inlet is opened. A liquid pumping device characterized by closing the mouth.

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