KR0161655B1 - Pump unit - Google Patents

Abstract

An object of the present invention is to increase the gas-liquid separation capability of the gas-liquid separation autonomy and to miniaturize the whole.

A pump (vane-type pump) 19 and a filter chamber 40 provided with a gas-liquid separator 31 and a filter 41 are continuously disposed in a casing 10 having an inlet and an outlet, and a gas-liquid separator ( 31) is formed by the vertical cyclone 32 of the lower end, and the cyclone 32 forms a cylindrical inlet portion 33, a trapezoidal trunk portion 34 and a conical ceiling portion 35. In this configuration, the flow path 30 from the pump 19 is opened 30a in the upper portion of the cyclone 32 to cause swirl flow in the cyclone 32. The hatching liquid is separated in the radial direction and the two are separated in the vertical direction by using a power difference. The separating liquid is passed through the filter 41 to the outlet, and the air hatching liquid is separated from the ceiling 35 of the cyclone 32. Is sent to the air separation chamber (not shown).

Description

Pump unit

1 is a longitudinal sectional view showing an internal structure of a pump unit according to the present invention.

2 is a sectional view taken along the line 2-2 arrow of FIG. 4, showing the internal structure of the pump unit.

3 is a cross-sectional view taken along the 3-3 arrow line of FIG.

4 is a cross-sectional view taken along line 4-4 of FIG.

FIG. 5 is a cross-sectional view taken along line 5-5 of FIG.

6 is a side view showing a part of the pump unit in cross section.

7 is a front view showing a part of the pump unit in cross section.

8 is a front view of the present pump unit.

9 is a top view of the pump unit.

10 is a cross-sectional view showing the structure of the valve assembly constituting the pump unit.

11 is a front view along the arrow line A of FIG.

12 is a cross-sectional view showing the structure of a relief valve constituting the pump unit.

13 is a front view along the B arrow line of FIG.

14 is a cross-sectional view showing a modification of the bubble preventing means of the gas separation chamber according to the present invention.

FIG. 15 is a cross-sectional view corresponding to FIG. 1 showing another embodiment of the present invention. FIG.

16 is a cross-sectional view corresponding to FIG. 3 showing an embodiment as shown in FIG.

* Explanation of symbols for main parts of the drawings

10 casing 11: inlet

12: outlet 15: suction check valve

19: pump 21: inlet of the pump

22: discharge port of the pump 31: gas-liquid separator

32: cyclone 32a: obstruction board

32b: Stay 33: Introduction to Cyclone

34: Cyclone Copper Plate 35: Cyclone Ceiling Plate

37a: opening (through hole) 40: filter chamber

41 filter 45 outlet check valve

56: relief valve 60: gas separation chamber

62: pipe member 64: liquid storage unit

67: float 72: return valve

76: return euro

The present invention relates to a pump unit equipped with an oil supply apparatus or the like.

For example, the oil supply device used in the oil supply station is required to be as small as possible due to space limitations, and with this, a small one as a pump unit is also required. On the other hand, gas is often mixed in gasoline or the like handled at a gas station, and the pump unit needs to have gas-liquid separation means.

Thus, a gas-liquid separation device having a casing having an inlet port and an outlet port in order to meet the above-described demands, and pivoting a pump suctioned from the inlet port and a fluid discharged from the pump to separate the liquid and the gaseous-enriched liquid. And a gas separation chamber for separating gas from the gaseous liquid separated in the gas-liquid separator, allowing the liquid separated in the gas-liquid separator to flow out of the outlet and simultaneously pumping the liquid separated in the gas separation chamber from the pump. A pump unit for returning to the suction inlet side has been developed and is disclosed, for example, in Japanese Patent Laid-Open No. 4-19389. According to such a pump unit, it is possible to reduce the size by arranging components in one casing, as well as to supply a liquid with very low gas mixing by double gas-liquid separation by a gas-liquid separator and a gas separation chamber.

However, according to the conventional pump unit, the separation capability of the gas-liquid separation device separating liquid and gas enrichment liquid is insufficient, so that the burden on the gas separation chamber side increases, and the gas separation chamber must be formed in a large size. There was a problem that large-scaled could not be avoided.

In addition, according to the conventional pump unit, the gas enrichment liquid separated by the gas separation device is allowed to fall into the gas separation chamber from above, and bubbles are generated in the liquid accumulated at the bottom of the gas separation chamber. As a result, the float type shut-off valve malfunctioned, causing a liquid containing gas to reflux to the pump side, thereby degrading the gas-liquid separation capability.

In addition, when the outlet of the gas enrichment liquid to the gas separation chamber is exposed to the air in the gas separation chamber, underpressure is generated into the gas-liquid separator at the time of pump stop, and air may return to the gas-liquid separator.

SUMMARY OF THE INVENTION The present invention has been made in view of the above conventional problems, and an object thereof is to provide a pump unit which increases the gas-liquid separation capability of the gas-liquid separation device as much as possible and contributes to further miniaturization.

In order to solve the above problems, the first invention provides a pump for sucking a fluid from the inlet side in a casing having an inlet port and an outlet port, and a gas-liquid incubator for turning the fluid discharged from the pump into liquid and gas-enriched liquid; And a gas separation chamber for separating gas from the gaseous liquid separated in the gas-liquid separator, and a gas separation chamber for separating gas from the gaseous liquid separated in the gas-liquid separator, and separated from the gas-liquid separator. A pump unit configured to drain a liquid from the outlet and return the liquid separated in the gas separation chamber to the suction port side of the pump, wherein the gas-liquid separator is formed of a vertical cyclone of the lower end, and the cyclone One end of the flow path connected to the discharge port of the pump to introduce the fluid in the tangential direction to the main wall of the It is set as the structure which opens at the same time and opens the end of the flow path connected to the said gas separation chamber to the ceiling center part of the said cyclone.

In the first aspect of the invention, the cyclone can be shaped to gradually tighten its lower side toward the lower end opening. In addition, according to the present invention, the ceiling portion of the cyclone can be formed in a conical shape, and one end of the flow path connected to the discharge port of the pump can be partially opened in the conical ceiling portion. In addition, a slit can also be provided below the cyclone in the axial direction.

In the pump unit configured as described above, the liquid mixed with the gas sent from the pump causes the pivoting motion in the cyclone, so the centrifugal force acting on the liquid and the gas is different. While the separated liquid flows down from the lower opening of the cyclone, the gas-enriched liquid containing gas is discharged from the opening of the cyclone ceiling to the gas separation chamber. However, since the cyclone is vertical, liquid and gas are separated in the vertical direction due to the difference in specific gravity, and the gas-liquid separation ability is improved with the centrifugation. In addition, when the lower side of the cyclone is tightened toward the lower end opening, the flow velocity of the swirl flow is directed downward, and the gas-liquid separation ability is further improved. In addition, when the cyclone ceiling is formed in a conical shape, it is easy to form a downward swirl flow, and the gas-liquid separation ability is further improved, and the separated gaseous liquid is easily discharged. In addition, when one end of the flow path connected to the discharge port of the pump is partially opened in the conical ceiling, the flow velocity of the swirl flow is increased even in the initial stage of fluid inflow into the cyclone, so that the gas-liquid separation ability is further improved. do.

The second invention is a rotary pump for sucking fluid from the inlet in the casing having an inlet and an outlet to solve the above problems, and a gas-liquid separator for turning the fluid discharged from the pump to separate the liquid and gas-enriched liquid; A gas separation chamber for receiving and storing gas-evaporated liquid separated from the gas-liquid separator from above, separating gas from the gas-liquid separating apparatus, and distilling the liquid separated from the gas-liquid separator from the outlet and simultaneously in the gas separation chamber. A pump unit configured to return the separated liquid to a suction port side of the pump via a float chamber opening / closing valve, wherein the gas separation chamber is provided with a pipe member for circulating gaseous liquid from the gas-liquid separation device. At the tip, the lowest liquid position that the float chamber on / off valve can be held in the closed valve position. A wall member is provided which stays in the liquid in the gas separation chamber while dividing the liquid and liquid surface around the pipe member in the gas separation chamber and the liquid and liquid surface around the float of the float valve. The wall member is characterized in that it is configured to open a part to circulate both liquids.

In the pump unit configured as described above, since the gaseous liquid from the gas-liquid separator is once supplied to the liquid storage of a small volume, the stock solution in the gas separation chamber is not stirred much larger than that of the gaseous liquid, and the bubble generation can be suppressed. Can be.

In addition, between the lowest liquid position in the liquid reservoir and the bottom of the liquid reservoir, a portion of the vertical wall constituting the liquid reservoir is opened and directed toward the distal end of the pipe member through which the gaseous liquid from the gas-liquid separator flows. Since the part and the gas separation chamber are in communication with each other, even when a negative pressure is generated in the gas-liquid separation device at the time of stopping the pump, the liquid is sucked up so that gas does not return to the gas-liquid separation device.

According to a third aspect of the present invention, in order to solve the above problems, a pump for sucking fluid from the inlet and a gas-liquid separator for turning fluid discharged from the pump into liquid and gas are provided in a casing having an inlet and an outlet. And a pump unit configured to allow the liquid separated by the gas-liquid separator to flow out from the inlet, wherein the gas-liquid separator is formed of a vertical cyclone of the lower end, and tangentially to the peripheral wall of the cyclone. An opening for opening one end of a flow path connected to the discharge port of the pump to introduce a fluid and an outlet for discharging the separated gas to the ceiling of the cyclone, and an opening for discharging the separated liquid to the lower end of the cyclone, respectively. And disposing an obstruction plate on the axis center of the cyclone that regulates the outflow of gas from the lower opening of the cyclone. In that the features.

In the pump unit configured as described above, the gas sent to the pump causes a swirling motion in the cyclone and the liquid mixed therein, and the liquid collects radially outward due to the difference in centrifugal force, and the gas gathers radially inward (near the shaft center). This separated liquid flows out from the lower opening of the cyclone, while gas is discharged from the ceiling opening of the cyclone. However, since the cyclone is vertical, liquid and gas are separated in the vertical direction due to the difference in specific gravity, and the gas-liquid separation ability is improved with the centrifugation. In addition, even when the column of separated gas grows large near the center of the shaft due to the large amount of mixed gas, the obstacle plate disposed on the center of the cyclone suppresses the outflow of gas from the lower opening of the cyclone, so that the gas-liquid separation ability is further increased. Done.

EXAMPLE

In FIGS. 1-9, 10 is the casing which provided the inlet 11 and the outlet 12 in the upper part, respectively, and is integrally cast with aluminum alloy. A suction chamber 13 is formed at the lower side of the casing 10 toward the inlet 11, and the suction chamber 13 includes a strainer 14 and a suction check valve 15 to be described later. ) Is excreted. On the other hand, a pump chamber 18 communicating with the suction chamber 13 and the flow path 17 (FIG. 4) is formed in the upper side of the casing 10, and the pump chamber 18 has a vane type pump (rotary pump). 19 is excreted. The pump 19 has a normal body 20 having a bottom that is wound in the pump chamber 18, and the body 20 has a suction port 21 connected to the flow path 17 and another flow path (described later) ( The discharge port 22 connected to 30 is provided.

The rotor 23 is disposed in the main body 20 of the pump 19, and the rotor 23 is fixed to the rotary shaft 24 extending the eccentric position of the main body 20. The rotating shaft 24 is rotatably supported by the bearing portion 25 integrally formed inside the casing 10 and the bearing portion 26a integrally formed on the cover body 26 covered with the outer wall of the casing 10. The pump chamber 18 and the main body 20 are partitioned into a sealed chamber by closing the opening 10a of the casing 10 by the lid 26. A plurality of vanes 27 are radially mounted to the rotor 23 in a radially outward manner, and each vane 27 is disposed in a recess 23a provided on both sides of the rotor 23. Each substrate is supported by this. In addition, a pulley 29 driven by a motor (not shown) is mounted at one end of the rotating shaft 24 extending out of the casing 10.

In such a pump 19, when the pulley 29 is rotated by the operation of a motor (not shown), this rotation is transmitted to the rotor 23 via the rotation shaft 24, and each vane 27 has its front end 20 in the main body 20. Rotate while taking in the inner circumferential surface of). At this time, since the rotor 23 rotates about an eccentric position with respect to the main body 20, the volume of each chamber partitioned by the vanes 27 is repeated, and the negative pressure is increased to the suction side in the main body 20. Occurs. Therefore, when the inlet 11 is connected to the tank, the fluid in the tank is rotated from the inlet 11 by the rotation of the rotor 23, the strainer 14, the suction check valve 15, the flow path 17 and the suction port ( It is sucked into the pump 19 via 21 and is discharged from the discharge port 22 to the flow path 30.

Moreover, the gas-liquid separator 31 is arrange | positioned in the part located in the upper side of the casing 10, and the opposite side to the pump 19. As shown in FIG. This gas-liquid separator 31 consists of the vertical type | mold cyclone 32 which opened the lower end, This cyclone 32 is the cylindrical inlet part 33 of the upper side, and is lowered from this inlet part 33. As shown in FIG. It is provided with a trapezoidal body portion 34 extending upwardly and gradually tightened toward the lower end opening and a conical ceiling 35 covering the upper side of the introduction portion 33. The body portion 34 of the cyclone 32 is formed so that the portion 34a corresponding to the half length of the lower side thereof protrudes into the filter chamber 40 described later, and intersects with the ceiling top of the filter chamber 40. Slits 36 extending in the longitudinal direction are formed in the peripheral wall portion of the protruding portion 34a.

The opening 30a which comprises one end of the said flow path 30 is provided in the upper part of the cyclone 32. As shown in FIG. This opening 30a is provided so that the fluid from the pump 19 can flow out in the tangential direction of the cyclone 32, and is provided in the longitudinal length via the introduction part 33 and the ceiling part 35. As shown in FIG. A stopper member 37 having a through hole 37a is attached to the center of the ceiling 35 of the cyclone 32. The through hole 37a of the plug member 37 communicates with the gas separation chamber 60 described later via the flow passage 39 in the lid 38 provided in the casing 10. In such a gas-liquid separator 31, the liquid mixed with the gas that has been pumped from the pump 19 through the flow path 30 flows into the cyclone 32 from the opening 30a to cause the pivoting movement, and the liquid and gas Different centrifugal force acts on the liquid to gather radially outward and at the same time gas gathers radially inward. The separated liquid flows down from the lower end opening of the trunk portion 34 to the filter chamber 40, while the gas-rich liquid containing gas is passed through the through hole 37a of the stopper member 37 of the ceiling 35. Is discharged to the flow passage 39 in the lid 38 and to the gas separation chamber 60.

The filter 41 is disposed in the filter chamber 40. The filter 41 is fitted into a hole 42a provided at the tip thereof in the vertical partition 42 in the casing 10 that partitions the filter chamber 40. At the rear of the filter 41, a compression spring 44 is disposed by abutting one end on a lid 43 covered with a casing 10, and the filter 41 is vertically formed by the compression spring 44. It is pressed against the partition 42. The opening 10b of the casing 10 closed by the lid 43 has a size sufficient to allow the filter 41 to be taken in and out, whereby the filter 41 detaches the lid 43. The exchange can be carried out as appropriate.

In front of the filter 41, one end of the flow path 46 through the outlet check valve 45 (4th, 6 degrees) provided on the upper side of the casing 10, and the suction check valve 15 One end of the flow passage 47 passing through the secondary side flow passage 17 is disposed through the vertical partition wall 48. The outlet check valve 45 includes a valve seat 51 attached to the through hole 50 formed in the horizontal partition wall 49 of the casing 10, and a valve body 52 detachable from the valve seat 51. And a valve spring 54 which contacts one end to the lid body 53 of the casing 10 and adds the valve body 52 in the closing direction at all times. The secondary side of the outlet check valve 45 is connected to the outlet 12 via a flow path 55 (FIG. 9). Therefore, the liquid separated from the gas-liquid separator 31 and flowed into the filter chamber 40 opens the outlet check valve 45 through the flow passage 46 from the filter 41, and then again flows out from the flow passage 55. It is conveyed to the outside through (12). In this case, the vertical valve 48 is fitted with a relief valve 56 to be described later, which is bolted to the side wall of the casing 10, and the outlet side is closed or tightened while the pump 19 is currently driven. The relief valve 56 is opened, and the liquid is returned from the flow passage 47 and the flow passage 17 to the suction port 21 of the pump 19.

On the other hand, a through hole 61 is formed in the upper wall of the casing 10 forming the gas separation chamber 60 toward the inside of the flow path 39 from the gas-liquid separator 31, as shown in FIG. The upper end of the pipe member 62 vertically lowered into the gas separation chamber 60 is press-fitted into the through hole 61 to introduce the gas enrichment liquid separated from the gas-liquid separator 31 into the gas separation chamber 60. have. The lower end of the tubular member 62 is a step portion of the partition 63 which is the bottom of the liquid storage portion 64 and the lowest liquid position in the storage portion 64 of the small volume installed near the lowest liquid position of the gas separation chamber 60. Extends between 63a, and this bottom is always submerged in liquid. The liquid reservoir 64 is formed in a U-shaped groove by a vertical partition 63 of the casing 10 and a vertical wall 64a parallel to the step 63a of the partition 63 and the partition 63. One end thereof is open as shown in FIG. As a result, the gas enrichment liquid supplied into the gas separation chamber 60 through the pipe member 62 once stays in the liquid storage unit 64, and then flows from one end to the bottom side of the gas separation chamber 60. I will stay. The gas is separated from the gas enrichment liquid between them, and the gas is discharged from the air vent 65 (FIG. 9) provided on the upper wall of the casing 10 to the outside.

The float 67 is arrange | positioned at the bottom side of the gas separation chamber 60. As shown in FIG. As for the float 67, the 1st boss | join part 69 is provided by making the tip part of the shaft part 67a extended from the one surface to a cover body 68 which bolted to the casing 10, and the 1st boss part 69 is provided. A shaft hole 70 is formed in the portion 69. In addition, an opening 71 is formed in the distal end of the boss portion 69 located in the gas separation chamber 60 to communicate the shaft hole 70 into the gas separation chamber 60. The valve body (poppet) which is comprised around the opening 71 as a valve seat of the return valve 72, and was pinned by the pin 73 to the shaft part 67a of the float 67 in this opening 71. Valve) 74 is fitted. This return valve 72 drives the valve body 74 as the float 67 rises, and opens the opening 71. In addition, the float 67 and the valve body 74 are already integrated with the cover body 68, and the gas separation chamber (through the opening 10c of the casing 10 closed by the cover body 68) ( 60) it is accessible. Moreover, the plug 75 which closes the axial hole 70 is screwed in the one end part of the said 1st boss | hub part 69 in the outer side of the cover body 68. As shown in FIG.

On the other hand, in the lower part of the casing 10, the return flow path 76 (4th, 5th and 7th) which communicates with the secondary side flow path 47 of the said relief valve 56 from the side surface of the casing 10 is formed. It is. The return flow path 76 and the shaft hole 70 in the first boss portion 69 are connected by a communication hole (not shown) in the second boss portion 77 provided in the casing 10. The connecting portion is provided with a check valve (flapper valve) 78 for restricting the flow of liquid back to the shaft hole 70 in the first boss portion 69 (FIG. 5). As a result, when the liquid stays in the gas separation chamber 60 and the float 67 rises, the return valve 72 is opened so that the liquid in the gas separation chamber 60 is discharged from the shaft hole in the first boss 69. 70), the communication hole in the second boss portion 77, the return passage 76, the secondary side passage 47 of the relief valve 56, and the secondary side passage 17 of the suction side check valve 15. Is returned to the inlet 21 of the pump 19.

Here, the valve assembly 16 disposed in the suction chamber 13 on the inlet 11 side mainly has a bottomed normal valve seat 80 as shown in FIGS. 10 and 11. The strainer 14 is fitted to one end of the sheet 80 and a lid 81 is provided at the other end of the valve seat 80. The lid 81 is composed of a plate portion 82 having a mounting hole 82a to the casing 10 and a plurality of leg portions 83 extending from the plate portion 82, and the leg portion 83 ) Is integrated into the valve seat 80 by screwing into the outer circumference of the valve seat 80. The through hole 80a is provided in the center of the bottom part of the valve seat 80, and the valve shaft 84 is perturbed freely in this through hole 80a. One end of the valve shaft 84 extending in the lid 81 is press-fitted to the valve body 85 while a valve spring 86 is provided at the other end of the valve shaft 84 extending into the strainer 14. Recommended. The valve spring 86 abuts both ends on a spring support 87 fixed to the back of the valve seat 80 and the other end of the valve shaft 84, and always adds the valve shaft 84 to the strainer 14 side. As a result, the valve body 85 is always kept in a closed state seated at the open end of the valve seat 80. A flow path 88 is further formed at the bottom of the valve seat 80, and fluid passing through the strainer 14 flows into the valve seat 80 through the flow path 88. The valve body 85 is composed of a support plate 85a connected to the valve shaft 84 and a rubber valve member 85c fixed to the support plate 85a by using a nut 85b.

The valve assembly 16 is inserted into the casing from the opening 10d provided in the casing 10, and is bolted to the casing 10 using the mounting hole 82a of the cover 81. At this time, the valve seat 80 is fitted into the hole 89 (FIG. 2) provided in the partition wall in the casing 10 via a sealing member, and the suction chamber 13 is partitioned into two front and rear chambers. When the pump 19 is operated in this assembled state, the valve body 85 opens against the force of the valve spring 86 due to the occurrence of negative pressure in the pump 19, and the flow path from the strainer 14 is opened. The fluid flowing into the valve seat 80 through the 88 flows into the flow path 17 through the inlet 21 of the pump 19.

In addition, the relief valve 56 arrange | positioned in front of the filter 41 is provided in the normal valve seat 90 with a bottom, and the bottom part of the valve seat 90, as shown to FIG. 12 and FIG. A valve body 91 which is installed by perturbating the shaft portion 91a freely in one through hole 90a and is detachable from the open end of the valve seat 90, and a cover body 92 having a shaft hole 92a; A valve spring which presses the valve element 91 against the valve seat 90 at all times by contacting one end at the bottom of the ordinary spring bearing 93 with the bottom subtracted into the shaft hole 92a of the lid 92. It consists of (94). The valve seat 90 is provided with a flow path 95 communicating with the inside and the outside thereof, and an installation hole 96 is provided in the cover body 92. In addition, the cover body 92 includes an adjustment spring 97 for adjusting the force of the valve spring 94 via the spring support 93.

The relief valve 56 is inserted into the casing from the opening 10e provided in the casing 10, and is bolted to the casing 10 using the mounting hole 96 of the cover 92. At this time, the valve seat 90 is fitted into the hole 98 provided in the partition wall 48 in the casing 10, and the flow passage 46 and the suction check valve 15 communicated with the outlet check valve 45. The flow path 47 leading to the secondary side of the membrane is completely encapsulated. When the hydraulic pressure in the flow passage 46 becomes higher than necessary in this assembled state, the valve body 91 opens against the force of the valve spring 94, and the liquid in the flow passage 46 flows into the flow passage 47. And the inlet 21 of the pump 19 from the flow path 17.

Hereinafter, the operation of the pump unit configured as described above will be described.

When the rotor 23 of the pump 19 is rotated by the operation (not shown), the valve body 85 of the suction side check valve 15 is opened, and the strainer 14 and the suction side check valve are opened from the inlet 11. The fluid in the tank is sucked into the pump 19 via the valve 15 and the flow path 17, and is discharged from the discharge port 22 to the flow path 30. Then, the fluid discharged from the pump 19 flows to the gas-liquid separator 31 side, flows into the cyclone 32 from the opening 30a of the flow path 30 to cause the pivoting movement, and by the difference in centrifugal force The gas collects radially with the liquid gathering outward. At this time, the liquid and gas are separated in the vertical direction by the specific gravity difference by employing the vertical cyclone 32, and the gas-liquid separation ability is improved together with the centrifugal separation.

In the present embodiment, in particular, the trunk portion 34 of the cyclone 32 is gradually tightened toward the lower end opening, so that the flow velocity of the swirl flow is directed downward, and the gas-liquid separation ability is further improved. Moreover, since the ceiling part 35 of the cyclone 32 is formed in a conical shape, it is easy to make downward swirl flow, and the flow velocity of swirl flow becomes high even in the initial stage which fluid flows into the cyclone 32, and gas-liquid separation ability is possible. This further improves. The liquid separated in this way flows down from the lower end opening of the trunk part 34 to the filter chamber 40, while the gas enrichment liquid containing gas is discharged from the through hole 37a of the pillar member 37 of the ceiling 35. It discharges to the flow path 39 in the cover body 38. At this time, the gas-enriched liquid is easily discharged by the cone of the ceiling 35. That is, the center of the bubble containing the gas is easily maintained at the center of the cyclone by the conical shape of the ceiling, so that the center of rotation can be stabilized.

Here, the liquid flowing down into the filter chamber 40 is extruded into the flow passage 46 through the filter 41, and the outlet check valve 45 is opened by the pressure of the liquid to open the outlet 12 from the flow passage 55. Is sent to. When gas remains in the liquid separated by the gas-liquid separator 31 in this manner, the gas stays in the upper portion of the filter chamber 40. This suspended gas remains in the upper part of the filter chamber 40 because there is a liquid flow during the operation of the pump 19. When the pump 19 is stopped, the cyclone is released from the slit 36 of the body 34. It returns to the inside of 32 and discharges from the ceiling 35 according to the reoperation of the pump 19. Therefore, the liquid containing gas is not supplied to the outlet 12. Further, when the liquid outflow from the outlet 12 is stopped or tightened, the relief valve 56 is opened to return the liquid to the inlet 21 of the pump 19 as described above.

On the other hand, the gas enrichment liquid discharged from the cyclone 32 into the flow path 39 in the lid 38 is supplied into the gas separation chamber 60 through the pipe member 62. At this time, when the gas enrichment liquid rapidly falls into the gas separation chamber 60, the liquid in the gas separation chamber 60 is greatly stirred to generate bubbles in the liquid remaining in the bottom of the gas separation chamber 60, and the float 67. That is, the return valve 72 malfunctions and the liquid containing gas flows into the return flow path 76. However, the tip of the pipe member 62 in the gas separation chamber 60 is located in the liquid in the liquid storage 64, so that the storage liquid in the gas separation chamber 60 is greatly agitated by the gas-enriched liquid. The gas-enriched liquid does not fall while diffusing into the gas separation chamber 60, so that bubble generation of the liquid is suppressed. In addition, gas separation proceeds in the gas separation chamber 60, and the separated gas is discharged to the outside from the air vent 65 of the casing 10. In this way, the liquid which separated gas stays in the gas separation chamber 60, and gradually raises the liquid position. Then, the float 67 rises, the valve body 74 of the return valve 72 opens, the liquid in the gas separation chamber 60 flows to the return flow path 76, and the secondary side of the relief valve 56. It returns to the suction port 21 of the pump 19 via the flow path 47 and the secondary side flow path 17 of the suction side check valve 15.

Further, the lower end of the pipe member 62 for distributing the gaseous liquid from the gas-liquid separator 31 between the lowest liquid position in the liquid reservoir 64 and the step portion 63a which is the bottom of the liquid reservoir is located. Part of the vertical wall 64a constituting the liquid reservoir 64 is opened so that the liquid reservoir 64 and the gas separation chamber 60 are in communication with each other. Even when a negative pressure occurs, the gas is sucked up through the lower end of the pipe member 62 so that the gas does not return to the gas-liquid separator 31.

In addition, although the partition 63 and the vertical wall 64a were used as the wall member in the said Example, it is not limited to this, For example, as shown in FIG. It may be surrounded by the cylindrical member 100 fixedly installed in the separation chamber 60, and this may be a tubular member. In this case, since the lower end portion of the cylindrical member is opened, the liquid position in the gas separation chamber and the cylindrical member is the same, and as in the above embodiment, bubbles are prevented and gas is not returned into the gas-liquid separator 31.

Further, in the above embodiment, a vane type is used as the pump 19. The pump is not particularly limited to the kind thereof, and can replace the gear pump, for example. In the above embodiment, the liquid storage portion 64 provided in the gas separation chamber 60 is formed in a U-shaped groove, the shape of which is arbitrary, and independent of the partition 63 of the casing 10. May be installed.

15 and 16 show a second embodiment of the present invention. Since the second embodiment is the same as the first embodiment except that the obstacle plate 32a and the stay 32b for supporting it are provided, the same components are denoted by the same reference numerals and the description thereof is omitted.

In the second embodiment, a circular obstacle plate 32a is disposed in the lower opening of the cyclone 32. The obstacle plate 32a is supported by a plurality of stays 32b (here, three) extending radially inwardly from the opening of the cyclone 32, and the center of the lower end opening of the cyclone 32 (axial center). It is closed over a predetermined range. By the way, when a large amount of gas is mixed in the liquid supplied to the pump 19, the gas collected near the center of the shaft by the centrifugation grows large in a columnar shape, and is separated from the through hole 37a of the ceiling 35. The bottom opening of the cron 32 is reached. The obstruction plate 32a serves to stop the growth of the pillar of the gas so as to protrude downward from the pillar of the gas, that is, protrude from the lower opening of the cyclone 32, and the obstruction plate 32 exists. As a result, the outflow from the lower end opening of the columnar gas is suppressed, and only the separating liquid falls into the filter chamber 40 through the annular flow path partitioned by the inlet edge of the lower opening and the peripheral edge of the obstruction plate 32a. do. Moreover, the size of the obstruction plate 32a is set larger than the diameter of the gas column derived by the revolution speed in the cyclone 32 of the fluid flowing out of the pump 19.

The liquid thus separated flows down from the lower end opening of the cyclone 32 into the filter chamber 40, while the gas-enriched liquid containing a large amount of gas passes through the through hole 37a of the pillar member 37 of the ceiling 35. ) Is discharged into the flow path 39 in the lid 38. At this time, since the ceiling 35 of the cyclone 32 is conical, it is easy to discharge the gaseous liquid. Here, for example, when a large amount of gas is mixed in the liquid supplied to the pump 19, the gas gathered near the axial center by the centrifugation grows large in a columnar shape, and the through hole 37a of the ceiling 35 ) To the lower end opening of the cyclone 32. However, the obstacle plate 32a is disposed at the center of the lower opening of the cyclone 32, and this gas preferentially flows into the through hole 37a of the ceiling 35 as a gas-enriched liquid containing gas. Dripping of the gas enrichment liquid to the filter chamber 40 can be suppressed.

In the above embodiment, the obstacle plate 32a provided in the cyclone 32 is disposed in the lower opening of the cyclone 32, and the obstacle plate 32a is disposed on the center of the axis of the cyclone 32, and is in between. The cyclone side opening 32a of the flow path 30 connected to the lower opening of the cron and the pump 19 should be installed near the lower opening so as to improve separation ability without interfering with the formation of pillars in the vicinity of the shaft center. It is effective in terms of the surface, and the barrier plate 32a may be installed below the lower opening so that the gas does not flow out from the lower opening of the cyclone (about 1 to 2 mm). In addition, the shape of this obstacle board 32a is not limited to the circular shape in the said Example, It can be set as ellipse, polygonal etc .. As shown in FIG.

As described in detail above, according to the pump unit according to the first invention, gas-liquid separation can be efficiently carried out using a vertical type of cyclone, and the gas separation chamber installed in connection with this is not required to be so large. Contributes to the miniaturization. In addition, by improving the shape of the cyclone and the liquid inlet port as necessary, the gas-liquid separation capability of the gas-liquid separation device can be further improved, and its useful value is increased.

Further, according to the pump unit according to the second aspect of the present invention, the stock solution in the gas separation chamber is not agitated greatly by the gas enrichment liquid, and bubble generation is suppressed, and the gas liquid separation ability is greatly improved.

In addition, according to the present pump unit, even when a negative pressure is generated in the gas-liquid separator at the time of stopping the pump, gas is not returned to the gas-liquid separator, thereby increasing the gas-liquid separation ability.

Moreover, according to the pump unit which concerns on 3rd invention, gas-liquid separation can be performed efficiently using a vertical cyclone. In addition, even when a large amount of gas is mixed, the obstruction plate disposed on the axis center in the cyclone suppresses the outflow from the lower opening of the cyclone of the column-shaped gas, so that the gas-liquid separation ability is further improved and the reliability of the device is also improved. It is greatly improved.

Claims (7)

A pump for sucking fluid from the inlet in a casing having an inlet and an outlet, a gas-liquid incubator for turning the fluid discharged from the pump into a liquid and a gas-enriched liquid, and a gas-enriched liquid separated from the gas-liquid separator. A gas separation chamber is provided for separating gas, and the pump unit is configured to drain the liquid separated in the gas-liquid separator from the outlet and return the liquid separated in the gas separation chamber to the inlet side of the pump. The separator is constituted by a vertical cyclone of the lower end, and one end of a flow path connected to the discharge port of the pump is opened at the same time as a fluid is introduced into the circumferential wall of the cyclone in a tangential direction thereof. Opening one end of a passage connecting the gas separation chamber to the Pump unit. The pump unit according to claim 1, wherein the lower side of the cyclone is gradually tightened toward the lower end opening. The pump unit according to claim 1, wherein the ceiling portion of the cyclone is formed in a conical shape. 4. The pump unit according to claim 3, wherein one end of the flow path connected to the discharge port of the pump is partially opened in a conical ceiling of a cyclone. The pump unit according to claim 1, wherein the cyclone is provided through a top wall of a room provided downstream thereof, and an slit in the axial direction is provided at a portion of the cyclone extending into the room. A rotary pump that sucks fluid from the inlet in a casing having an inlet and an outlet, a gas-liquid separator for turning fluid discharged from the pump into a liquid and a gas-enriched liquid, and a gas-liquid separated from the gas-liquid separator And store a gas separation chamber for separating gas from the upper side, and discharge the liquid separated by the gas-liquid separator from the outlet port, and at the same time, the liquid separated in the gas separation chamber via a float valve. A pump unit for returning to the suction port side of the pump, wherein the gas separation chamber is provided with a pipe member for circulating gaseous liquid from the gas-liquid separator, and the float type on / off valve closes the end of the pipe member. Liquid in the gas separation chamber at the lowest liquid level maintained in position At the same time, a pipe member for separating the liquid and the liquid level around the pipe member in the gas separation chamber and the liquid and the liquid level around the float of the float on / off valve is to be provided, and the wall member must distribute both liquids. A pump unit, characterized in that the opening portion. A rotary pump for sucking fluid from the inlet and a gas-liquid separator for turning fluid discharged from the pump into liquid and gas in a casing having an inlet and an outlet, and separating the liquid separated from the gas-liquid separator. A pump unit configured to flow out of a discharge port, wherein the gas-liquid separator is constituted by a vertical cyclone of the lower end, and connected to the discharge port of the pump to introduce a fluid in a tangential direction to the peripheral wall of the cyclone. An opening for discharging the gas separated in the ceiling of the cyclone while opening one end of the flow path, and an opening for discharging the separated liquid at the lower end of the cyclone, respectively, and the cyclone on the axis center of the cyclone. A pump unit, characterized in that the obstacle plate for regulating the outflow of gas from the lower opening of the.