JP7085801B2 - Pumping unit - Google Patents

Description

The present invention relates to a pump unit.

A pump that discharges the sucked liquid, a cyclone chamber that separates a liquid containing a relatively large amount of gas (hereinafter referred to as a gas enriched liquid) from the liquid discharged by the pump, and a gas from the gas enriched liquid that flows in from the cyclone chamber. There is known a pump unit including a gas separation chamber for separating the gas, and a casing provided with a pump, a cyclone chamber, a gas separation chamber, and the like (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2014-234754

However, the amount of gas mixed in the liquid discharged by the pump varies. Therefore, if the flow area between the cyclone chamber and the gas separation chamber is fixed in a relatively small state, the gas-enriched liquid contained in the liquid may not be sufficiently discharged. On the other hand, if the flow area between the cyclone chamber and the gas separation chamber is fixed in a relatively large state, the amount of liquid flowing into the gas separation chamber increases, and even liquids with a small amount of gas mixed in are gas. There is a possibility that it will be discharged to the separation room.

Therefore, in view of the above problems, it is an object of the present invention to provide a pump unit capable of appropriately separating a gas-enriched liquid according to the amount of gas mixed in the liquid flowing into the cyclone chamber.

In order to achieve the above object, in one embodiment of the present invention,
With the casing
A pump provided in the casing and discharging the sucked liquid,
A cyclone chamber provided in the casing and separating the gas-enriched liquid from the liquid discharged from the pump.
A gas separation chamber provided in the casing and separating the gas from the gas enrichment liquid,
An orifice that allows the gas-enriched liquid to flow out of the cyclone chamber,
With the adjustment valve,
A plurality of passages provided in the first member attached to the casing and communicating with the gas separation chamber downstream of the orifice , the first passage arranged substantially coaxially with the orifice, and the said. An accommodating portion provided separately from the first passage and accommodating the adjusting valve, and an outflow portion provided at a position eccentric from the extending direction of the accommodating portion to allow the gas-enriched liquid to flow out toward the gas separation chamber. A second passage, including, and a plurality of passages .
A branch portion that branches from the orifice to the plurality of passages is provided.
The first member includes the plurality of passages, and has a first communication portion communicating with the cyclone chamber and a second communication portion communicating with the gas separation chamber .
The first communication portion and the second communication portion communicate with each other through a third communication portion provided in the second member attached to the first member.
The adjusting valve adjusts the amount of liquid flowing from the branch portion to the second passage according to the amount of gas mixed in the liquid by moving the valve body in the accommodating portion.
A pump unit is provided.

According to the present embodiment, it is possible to provide a pump unit capable of appropriately separating the gas-enriched liquid according to the amount of gas mixed in the liquid flowing into the cyclone chamber.

It is a figure which shows an example of the structure of a pump unit schematically. It is a block diagram which shows the flow of the liquid (fuel) in a pump unit schematicly. It is sectional drawing which shows an example of the structure of the flow rate adjustment part of a pump unit. It is sectional drawing which shows an example of the structure of the flow rate adjustment part of a pump unit.

Hereinafter, embodiments for carrying out the invention will be described with reference to the drawings.

First, the basic configuration of the pump unit 1 according to the present embodiment will be described with reference to FIGS. 1 and 2.

FIG. 1 is a diagram schematically showing an example of the configuration of the pump unit 1 according to the present embodiment. FIG. 2 is a diagram showing the flow of liquid in the pump unit 1 according to the present embodiment in order.

Note that FIG. 1 schematically shows the configuration of the pump unit 1 in two dimensions. For example, various configurations formed in the casing 30 may be arranged in three dimensions in practice. Further, the arrow in FIG. 1 indicates the flow of the liquid when the pump is driven (when the gear pump 48 described later is driven).

As shown in FIGS. 1 and 2, the pump unit 1 is mounted on a fuel supply device that supplies a liquid fuel such as gasoline or light oil (hereinafter referred to as “liquid”), and is stored in an underground tank 12. Is pumped up, and the bubbles contained in the liquid are separated and sent to the flow meter 20.

The liquid fuel measured by the flow meter 20 is supplied to a fuel tank of a vehicle or the like via a hose and a nozzle of the fuel supply device.

The pump unit 1 includes an inflow chamber 31, a rotor chamber 32, a cyclone chamber (gas-liquid separation chamber) 33, an outflow path 34, a gas separation chamber 36, a filter chamber 55, and the like formed inside the casing 30.

The inflow chamber 31 is provided with a strainer mounting chamber 38 communicating with an inflow port 37 opening at the bottom of the casing 30 and a check valve mounting chamber 39 adjacent to the downstream side (outflow side) of the strainer mounting chamber 38. Has been done. Further, the outflow side of the strainer mounting chamber 38 and the inflow side of the check valve mounting chamber 39 are communicated with each other through the opening of the valve seat 45.

The strainer 44 is housed in the strainer mounting chamber 38. The strainer 44 is configured to include a wire mesh that captures foreign matter contained in the liquid flowing in from the inflow port 37, and has a substantially cylindrical shape in which one end on the inflow side is opened and the other end on the outflow side is closed.

The liquid sucked from the inflow port 37 by driving the gear pump 48, which will be described later, is filtered by the strainer 44, passes through the opening of the valve seat 45, and flows into the check valve mounting chamber 39.

The check valve mounting chamber 39 is provided with an inflow side check valve 40 so as to be openable and closable. Further, a flow path 41 for supplying liquid to the rotor chamber 32 of the gear pump 48 is provided in the upper portion (downstream side) of the check valve mounting chamber 39.

The inflow side check valve 40 is urged in the direction of closing the valve seat 45 by the elastic force of the coil spring 42, opens by the suction pressure (negative pressure) when the pump is driven, and the suction pressure when the pump is stopped. Closes when becomes less than a predetermined value. Therefore, when the inflow side check valve 40 opens, the liquid fuel flows out to the suction side flow path 46 connected to the rotor chamber 32 through the flow path 41.

A gear pump 48 (an example of a pump) is provided in the rotor chamber 32. The gear pump 48 includes an outer rotor 50 that is rotated by transmitting the rotational driving force of the motor, and an inner rotor 52 that is rotationally driven by the outer rotor 50.

The outer rotor 50 is rotatably supported around a rotation axis (not shown), has a substantially disk shape corresponding to the inner diameter of the rotor chamber 32, and has a semicircular engaging portion 50a on the outer edge side of the disk-shaped plane. Are provided at a predetermined pitch (interval) in the rotation direction (circumferential direction). Further, the inner rotor 52 is rotatably supported by the inner rotation shaft 53, and a plurality of semicircular recesses 52a corresponding to the engaging portions 50a of the outer rotor 50 are provided on the outer periphery at a predetermined pitch (interval). It is provided.

The center of rotation of the outer rotor 50 and the center of rotation of the inner rotor 52 (inner rotation shaft 53) are eccentric in the vertical direction, and there is an eccentricity between the outer circumference of the inner rotor 52 and the inner circumference of the outer rotor 50. A corresponding crescent-shaped partition 51 is provided. For example, as shown in FIG. 1, the center of rotation of the inner rotor 52 is provided below the center of rotation of the outer rotor 50, and the partition portion 51 is circumscribed with the inner rotor 52 and inscribed with the outer rotor 50. Is provided above the center of rotation of the outer rotor 50. The inner peripheral surface 51a of the partition portion 51 is a pinion sliding contact surface with which the outer periphery of the inner rotor 52 is in sliding contact, and the outer peripheral surface 51b of the partition portion 51 is a rotor sliding contact surface with which the engaging portion 50a of the outer rotor 50 is in sliding contact. be.

By engaging the engaging portion 50a of the outer rotor 50 with the recess 52a of the inner rotor 52, the inner rotor 52 is also rotationally driven in the same direction in response to the rotational drive of the outer rotor 50 by the motor. Then, the check valve 40 on the inflow side is opened due to the generation of negative pressure in the rotor chamber 32, and the liquid that has passed through the strainer 44 is sucked into the suction port 32c of the rotor chamber 32. In the gear pump 48, the outer rotor 50 and the inner rotor 52 are rotationally driven in the counterclockwise direction, so that the liquid sucked from the suction side flow path 46 is the recess 52a of the inner rotor 52 and the engaging portion 50a of the outer rotor 50. It flows into the space and is discharged to the discharge side flow path 47 communicated with the discharge port 32d of the rotor chamber 32.

The pump unit 1 may be provided with a vane (blade) type pump instead of the gear pump 48.

The liquid discharged from the gear pump 48 flows into the cyclone chamber (gas-liquid separation chamber) 33 arranged downstream of the discharge side flow path 47. The cyclone chamber 33 has a substantially cylindrical shape, and is installed in such a manner that the central axis of the substantially cylindrical shape is along the horizontal direction. Further, the cyclone chamber 33 has a substantially cylindrical shape on one end side to be opened, that is, the downstream side is communicated with the filter chamber 55 having the filter 54, and the inner wall on the other end side is a gas rich containing a relatively large amount of gas. A communication hole 58 (an example of an orifice) for collecting the chemical solution in the gas separation chamber 36 is provided. The communication hole 58 is connected to the flow rate adjusting unit 100 and communicates with the gas separation chamber 36 through the flow rate adjusting unit 100. As will be described later, since the gas enrichment liquid is separated near the swirling center of the gas separation chamber 36, that is, near the center axis of the substantially cylindrical shape, the communication hole 58 is separated from the center axis of the substantially cylindrical shape of the cyclone chamber 33. It is preferable to be provided on the intersecting inner wall portion.

The cyclone chamber 33 may be installed in a vertical direction, or may be installed in an inclined direction inclined in a horizontal direction rather than a vertical direction.

The liquid flowing into the cyclone chamber 33 swirls in the cyclone chamber 33. A liquid with a relatively large amount of gas mixed (gas enriched liquid) tends to collect near the swirling center of the cyclone chamber 33 due to its small specific gravity, and the gas enriched liquid near the swirling center and the downstream side along the swirling flow. It is separated into a liquid that flows out to (filter chamber 55 side) and has a reduced amount of gas mixed. The gas-enriched liquid separated from the liquid flows out from the communication hole 58 to the gas separation chamber 36 through the flow rate adjusting unit 100, and the liquid from which the gas-enriched liquid is separated flows into the filter chamber 55.

One end of the flow rate adjusting unit 100 is connected to a communication hole 58 provided in the inner wall of the cyclone chamber 33, and the other end is connected to a communication hole 59 provided in the inner wall of the gas separation chamber 36, and flows into the cyclone chamber 33. The amount of the liquid containing the gas-enriched liquid flowing from the cyclone chamber 33 to the gas separation chamber 36 is adjusted according to the amount of gas mixed in the liquid to be mixed. The flow rate adjusting unit 100 includes a plurality of (two in this embodiment) passages 102 and 104 provided on the downstream side of the communication hole 58 of the cyclone chamber 33, and an adjusting valve 106 provided in the passage 104.

Both the passages 102 and 104 are liquid flow paths connecting the communication hole 58 of the cyclone chamber 33 and the communication hole 59 of the gas separation chamber 36. The passage 102 is always in a communicating state, while the passage 104 switches between communication and non-communication according to the open / closed state of the adjusting valve 106, and the liquid flowing through the passage 104 according to the opening degree of the adjusting valve 106. The flow rate changes. That is, the flow path area for discharging the liquid containing the gas-enriched liquid from the cyclone chamber 33 to the gas separation chamber 36 minimizes the flow path area of the passage 102 and maximizes the total flow path area of the passages 102 and 104. It is variable in the range according to the open / closed state and the opening degree of the adjusting valve 106.

The adjusting valve 106 adjusts the amount of liquid flowing from the cyclone chamber 33 to the gas separation chamber 36 through the passage 104 according to the amount of gas mixed in the liquid flowing into the cyclone chamber 33. Specifically, the adjustment valve 106 increases the amount of liquid flowing through the passage 104 as the amount of gas mixed in the liquid flowing into the cyclone chamber 33 increases, and mixes with the liquid flowing into the cyclone chamber 33. The smaller the amount of gas, the smaller the amount of liquid flowing through the passage 104. Then, when the amount of gas mixed in the liquid flowing into the cyclone chamber 33 is not more than a predetermined value, the adjusting valve 106 makes the passage 104 non-communication. For example, the adjusting valve 106 opens when the pressure of the liquid flowing into the cyclone chamber 33 (that is, the pressure acting from the liquid on the upstream side of the communication hole 58 and the passage 104) becomes lower than a predetermined value, and the pressure drops. Accordingly, the valve opening amount may be increased. This is because the pressure of the liquid decreases as the amount of gas mixed in the liquid increases. As a result, when the amount of gas mixed in the liquid flowing into the cyclone chamber 33 is relatively small, the flow rate of the passage 104 is small, or the passage 104 is not in communication, so that the amount of gas mixed is relatively small. Even so, it can be prevented from being discharged to the gas separation chamber 36. Further, when the amount of gas mixed in the liquid flowing into the cyclone chamber 33 is relatively large, the flow rate of the passage 104 is large, so that a relatively large amount of gas is separated from the liquid having a relatively large amount of gas mixed in. The chemical solution can be sufficiently discharged. That is, the gas-enriched liquid can be appropriately discharged from the cyclone chamber 33 to the gas separation chamber 36 according to the amount of gas mixed in the liquid.

The bottom of the gas separation chamber 36 is provided with a return hole 60 for returning the liquid to the rotor chamber 32 of the gear pump 48, and the ceiling is provided with an atmospheric opening hole 62. Further, the gas separation chamber 36 is provided with a float valve 70 that opens and closes the return hole 60. The float valve 70 opens the return hole 60 when the liquid level height of the liquid containing the gas-enriched liquid in the gas separation chamber 36 is equal to or higher than a predetermined height.

In the gas separation chamber 36, bubbles (gas) contained in the liquid float in the upper space and are discharged into the atmosphere through the atmosphere opening hole 62. Further, when the liquid level reaches a predetermined height, the liquid from which the bubbles are separated passes through the return hole 60 by opening the float valve 70 and is returned to the suction side flow path 46.

On the other hand, in the cyclone chamber 33, the liquid from which the gas-enriched liquid is separated is filtered by the filter 54 and then passed through the outflow path 34 and supplied to the flow meter 20.

The outflow side check valve 64 provided in the outflow path 34 is opened by the pressure of the liquid delivered by the gear pump 48.

Further, a relief valve 80 is provided in the discharge side flow path 47. When the hydraulic pressure of the discharge side flow path 47, that is, the hydraulic pressure (discharge pressure) of the liquid discharged from the gear pump 48 rises above a predetermined relief pressure, a part of the liquid in the discharge side flow path 47 is a relief valve. The valve 80 is opened and returned to the rotor chamber 32 of the gear pump 48. The relief valve 80 is urged in the valve closing direction by the elastic force of the coil spring 82, and is the difference between the discharge pressure of the discharge side flow path 47 and the resultant force obtained by adding the suction pressure of the rotor chamber 32 to the elastic force of the coil spring 82. It opens and closes according to.

Next, the details of the configuration of the flow rate adjusting unit 100 will be described with reference to FIGS. 3 and 4.

3 and 4 are cross-sectional views showing an example of the configuration of the flow rate adjusting unit 100 of the pump unit 1. Specifically, FIG. 3 is a cross-sectional view showing an example of the configuration of the flow rate adjusting unit 100 when the adjusting valve 106 is closed, and FIG. 4 is a configuration of the flow rate adjusting unit 100 when the adjusting valve 106 is opened. It is sectional drawing which shows an example.

The dotted line arrows in FIGS. 3 and 4 indicate the flow of the liquid containing the gas-enriched liquid when the pump is driven.

As shown in FIGS. 3 and 4, the flow rate adjusting unit 100 includes the passages 102 and 104 and the adjusting valve 106 as described above. Further, the flow rate adjusting unit 100 includes a merging portion 112 where the passages 102 and 104 merge, and a passage 114 connecting the merging portion 112 and the gas separation chamber 36 (communication hole 59) in the casing 30. The passages 102 and 104 and the passage 114 are formed inside an intermediate member 108 that is detachably attached to the casing 30, and the merging portion 112 is attached to the intermediate member 108 and is attached to the intermediate member 108 and is attached to the casing 30 via the intermediate member 108. It is formed in a lid member 110 that closes the passages 102 and 104 that communicate with the outside and the passage 114. The intermediate member 108 and the lid member 110 are bolted to the outer surface 30a of the casing 30 by using, for example, the same bolt 130. That is, the lid member 110 is attached to the intermediate member 108 and the casing 30 by using the bolt 130.

The lid member 110 may be attached to the intermediate member 108 after being attached to the casing 30. Further, an annular recess 116 surrounding a portion corresponding to the passages 102 and 104 (specifically, a branch portion 104a described later) is provided on the mounting surface 108a of the intermediate member 108 with the casing 30, and the recess 116 is provided with an annular recess 116. Contains the sealing material 118. Further, the mounting surface 108a of the intermediate member 108 with the casing 30 is provided with an annular recess 120 surrounding the portion corresponding to the passage 114, and the recess 120 accommodates the sealing material 122. Further, a gasket 124 is interposed between the intermediate member 108 and the lid member 110, and the gasket 124 is provided with a notch corresponding to the merging portion 112 formed in the lid member 110.

The communication hole 58 provided in the inner wall of the cyclone chamber 33 and the communication hole 59 provided in the inner wall of the gas separation chamber 36 both penetrate substantially perpendicularly to the outer surface 30a of the casing 30 and with the outside of the casing 30. Communicating.

The intermediate member 108 is substantially parallel and has a surface area capable of sufficiently covering the communication holes 58 and 59 penetrating the outer surface 30a, and the mounting surface 108a of the casing 30 and the mounting surface 108b of the lid member 110. Has. Passages 102 and 104 are formed in the intermediate member 108 in a state of being attached to the casing 30 so as to penetrate from the portion of the attachment surface 108a corresponding to the communication hole 58 toward the attachment surface 108b. Further, the intermediate member 108 is formed with a passage 114 that penetrates from the portion of the mounting surface 108a corresponding to the communication hole 59 toward the mounting surface 108b while being mounted on the casing 30.

The passage 102 is a through hole having a substantially cylindrical shape, and is an intermediate member 108 attached to the casing 30 so as to extend from the communication hole 58 penetrating the outer surface 30a of the casing 30 with the attachment surface 108a. It penetrates between the mounting surface 108b and the mounting surfaces 108a and 108b in a direction substantially perpendicular to the mounting surfaces 108a and 108b.

The passage 104 includes a branch portion 104a branching from the passage 102, a valve accommodating portion 104b in which the adjusting valve 106 is accommodated, and an outflow portion 104c through which the liquid passing through the adjusting valve 106 is discharged.

The branch portion 104a is formed as a substantially cylindrical recess provided in the intermediate member 108 in a state of being attached to the casing 30 in a direction substantially perpendicular to the attachment surface 108a. The branch portion 104a includes a portion corresponding to the communication hole 58 in the mounting surface 108a, and the cross-sectional area having a substantially cylindrical shape is provided in such a manner that the cross-sectional area is sufficiently wider than the portion.

The valve accommodating portion 104b extends substantially vertically from the bottom of the branch portion 104a (substantially cylindrical recess) toward the mounting surface 108b in parallel with the passage 102, and has a substantially cylindrical diameter that gradually decreases. It is formed as a concave portion of the shape. Of the valve accommodating portion 104b, a disk-shaped head portion of the valve body 106a, which will be described later, of the adjusting valve 106 can move in the axial direction in a large-diameter portion extending from the bottom of the branch portion 104a toward the mounting surface 108b. In the small diameter portion extending from the large diameter portion toward the mounting surface 108b, the shaft portion of the valve body 106a and the coil spring 106b of the adjustment valve 106, which will be described later, are accommodated in the small diameter portion.

As a matter of course, the central axis of the substantially cylindrical recess of the valve accommodating portion 104b is largely eccentric from the central axis of the passage 102, and the structure is such that the valve accommodating portion 104b and the passage 102 do not intersect. There is.

The outflow portion 104c is formed in the intermediate member 108 as a substantially cylindrical recess provided in a direction substantially perpendicular to the mounting surface 108b. The central axis of the substantially cylindrical recess of the outflow portion 104c is eccentric from the central axis of the valve accommodating portion 104b to the side away from the passage 102, and the side surface of the substantially cylindrical concave portion and the valve accommodating portion. It is provided so as to communicate with the side surface of the small diameter portion of 104b.

In FIGS. 3 and 4, the outflow portion 104c has a substantially cylindrical concave portion having a sharp tip (bottom) due to the shape of the tip of the machining tool.

The passage 114 is a through hole having a substantially cylindrical shape, and has a mounting surface having substantially the same central axis as the communication hole 59 penetrating the outer surface 30a of the casing 30 in the intermediate member 108 in a state of being attached to the casing 30. It penetrates between the mounting surface 108a and the mounting surface 108b in a direction substantially perpendicular to the mounting surfaces 108a and 108b. The cross-sectional area of the passage 114 is set wider than the cross-sectional area (flow area) of the passages 102 and 104, assuming the maximum flow rate of the liquid flowing through both the passages 102 and 104.

The lid member 110 is attached to the intermediate member 108 via the gasket 124. The lid member 110 is formed with a merging portion 112 as a recess provided in the mounting surface 110a with the intermediate member 108 (that is, the mating surface with the gasket 124).

The merging portion 112 has a portion corresponding to the passage 102, the passage 104 (specifically, the outflow portion 104c), and the passage 114 on the mounting surface of the intermediate member 108 in a state where the lid member 110 is attached to the intermediate member 108. It is provided as a recess in the mounting surface 110a of the lid member 110 so as to cover all of them. As a result, the liquid containing the gas-enriched liquid flowing out from the cyclone chamber 33 through the communication holes 58 and the passages 102 and 104 to the mounting surface 108b side of the intermediate member 108 flows into the passage 114 through the merging portion 112 and into the passage 114. It is discharged to the gas separation chamber 36 through 114 and the communication hole 59.

As described above, the adjusting valve 106 is housed in the valve accommodating portion 104b of the passage 104. The adjusting valve 106 includes a valve body 106a and a coil spring 106b.

The valve body 106a includes a head portion having a substantially disk shape and a shaft portion extending in a substantially vertical direction from the center of the substantially disk shape of the head portion. The valve body 106a is inserted into a hole whose shaft portion penetrates substantially vertically from the bottom of the valve accommodating portion 104b as a substantially cylindrical recess in the intermediate member 108 toward the mounting surface 108b. The head portion is arranged so as to be accommodated in the large diameter portion of the valve accommodating portion 104b. Further, the head portion of the valve body 106a has a diameter smaller than the inner diameter of the substantially cylindrical shape of the large diameter portion of the valve accommodating portion 104b, and has a diameter larger than the inner diameter of the substantially cylindrical shape of the small diameter portion of the valve accommodating portion 104b. be. Therefore, the head portion of the valve body 106a is configured to be movable in the axial direction in the large diameter portion of the valve accommodating portion 104b, and abuts on the stepped portion between the large diameter portion and the small diameter portion of the valve accommodating portion 104b. Thereby, the passage 104 can be put into a non-communication state.

The coil spring 106b is arranged between the head portion of the valve body 106a and the bottom portion of the valve accommodating portion 104b (small diameter portion), and urges the valve body 106a toward the mounting surface 108a, that is, opens the valve body 106a. Encourage the valve side. As a result, as shown in FIG. 3, the pressure of the liquid acting on the head portion of the valve body 106a from the branch portion 104a side (that is, the pressure of the liquid flowing into the cyclone chamber 33) corresponds to the specifications of the coil spring 106b. When the value is equal to or higher than the predetermined value, the head portion of the valve body 106a can be brought into contact with the step between the large diameter portion and the small diameter portion of the valve accommodating portion 104b, and the passage 104 can be in a non-communication state. Therefore, for example, when the amount of gas mixed in the liquid flowing into the cyclone chamber 33 is relatively small and the pressure of the liquid acting on the head portion of the valve body 106a from the branch portion 104a side is equal to or higher than the predetermined value. The flow area of the liquid can be limited to that of the passage 102, and even a liquid having a relatively small amount of gas mixed can be prevented from being discharged to the gas separation chamber 36. On the other hand, as shown in FIG. 4, when the pressure of the liquid acting on the head portion of the valve body 106a from the branch portion 104a side (that is, the pressure of the liquid flowing into the cyclone chamber 33) is lower than the predetermined value, the valve body The head portion of the 106a is separated from the step between the large diameter portion and the small diameter portion of the valve accommodating portion 104b according to the urging force of the coil spring 106b, and is between the head portion of the valve body 106a and the valve accommodating portion 104b. The liquid is discharged to the outflow portion 104c through the gap between the two. Therefore, for example, when the amount of gas mixed in the liquid flowing into the cyclone chamber 33 is relatively large, the flow rate of the passage 104 is large, so that the liquid separated from the liquid having a relatively large amount of gas mixed is relatively large. The gas-enriched liquid can be sufficiently discharged.

As described above, in the present embodiment, a plurality of passages (passages 102 and 104) communicating with the gas separation chamber 36 are provided downstream of the communication hole 58 through which the gas enriched liquid flows out from the cyclone chamber 33, and a plurality of passages are provided. A regulating valve 106 for adjusting the amount of flowing liquid according to the amount of gas mixed in the liquid is provided in a part of the passages (passage 104). As a result, as described above, the gas-enriched liquid can be appropriately discharged from the cyclone chamber 33 to the gas separation chamber 36 according to the amount of gas mixed in the liquid. Further, since the adjusting valve 106 is provided in the passage 104 on the downstream side of the cyclone chamber 33, maintenance work including installation work at the time of manufacturing and attachment / detachment work at the time of maintenance can be easily performed, and workability is improved. Can be done.

In the present embodiment, the number of passages provided downstream of the communication hole 58 is two, but may be three or more. In this case, the adjusting valve 106 may be provided in a part of the three or more passages, and the adjusting valve 106 may be provided in the two or more passages. Further, in this case, the adjusting valves 106 provided in the two or more passages have different specifications (value of the pressure of the liquid acting on the head portion of the valve body 106a from the branch portion 104a side for opening the valve). good. As a result, the adjusting valves 106 provided in the two or more passages can be opened and closed stepwise, and the amount of liquid flowing from the cyclone chamber 33 to the gas separation chamber 36 can be finely adjusted.

Further, in the present embodiment, the passage 102 in which the adjusting valve 106 is not provided is arranged substantially coaxially with the communication hole 58 (orifice) provided in the inner wall of the cyclone chamber 33. As a result, the liquid containing the gas-enriched liquid separated coaxially with the communication hole 58 in the cyclone chamber 33 is likely to flow out from the communication hole 58 to the passage 102, so that the separation performance of the liquid containing the gas-enriched liquid can be improved. Can be improved.

Further, in the present embodiment, the head portion of the valve body 106a of the adjusting valve 106 does not protrude to the branch portion 104a at the time of valve opening (FIG. 4), and has a structure that fits within the large diameter portion of the valve accommodating portion 104b. ing. That is, with the coil spring 106b having a natural length, the end surface of the head portion of the valve body 106a on the branch portion 104a side is flush with the bottom surface of the cylindrical recess of the branch portion 104a, or the valve is located from the bottom surface. It is on the accommodating portion 104b side. As a result, the liquid flows from the communication hole 58 into the branch portion 104a without being hindered by the head portion of the valve body 106a. Further, the pressure of the liquid does not act on the side surface of the head portion of the valve body 106a, but the pressure of the liquid acts on the surface of the head portion of the valve body 106a on the branch portion 104a side along the moving direction of the valve body 106a. That is, the pressure of the liquid acts in the direction opposite to the urging force of the coil spring 106b urging the adjusting valve 106 in the valve opening direction. Therefore, the valve closing operation of the valve body 106a can be performed more reliably.

Further, in the present embodiment, the flow path area of the communication hole 58 is set wider than the cross-sectional area (flow path area) of the branch portion 104a and the passage 102. Therefore, a pressure difference between the liquids is likely to occur from the communication hole 58 toward the passage 102 and the branch portion 104a. The pressure difference becomes the largest between the upstream side and the downstream side of the head portion of the valve body 106a at the time of valve opening, and the responsiveness of the operation of the adjusting valve 106, that is, the valve body 106a to the change in pressure is increased. Can be improved. That is, by utilizing the difference in pressure, the valve body 106a can be steadily moved from the valve opening to the valve closing direction. Further, the flow path area of the minute gap formed between the side surface of the head portion of the valve body 106a and the inner surface of the large diameter portion of the valve accommodating portion 104b is the cross-sectional area (flow path area) of the branch portion 104a and the passage 102. ), It is easy to generate a pressure difference between the upstream side and the downstream side of the head portion of the valve body 106a at the time of valve opening, and the responsiveness of the operation of the adjusting valve 106 to the change in pressure is further improved. be able to.

Further, in the present embodiment, a plurality of passages (passages 102 and 104) attached to the casing 30 and communication passages (confluence portion 112 and passage 114) communicating between the plurality of passages and the gas separation chamber 36 are internally provided. The mounting member (intermediate member 108 and lid member 110) included in the above is provided. As a result, by removing the mounting member (intermediate member 108 and lid member 110), the adjusting valve 106 can also be removed integrally, so that the maintainability of the adjusting valve 106 and the like is improved.

Further, in the present embodiment, the mounting member is an intermediate member 108 that is attached to the casing 30 and includes a plurality of passages (passages 102 and 104) that communicate with the outside and a passage 114 that communicates with the outside. A plurality of passages (passages 102, 104) exposed to the outside of 108 and a lid member 110 attached to the intermediate member 108 in a manner of closing the passage 114 and including a merging portion 112. As a result, the mounting member that can be removed from the casing 30 is further disassembled into the removable intermediate member 108 and the lid member 110, so that maintainability is improved. Further, the mounting members include an intermediate member 108 in which passages 102, 104, 114 and the like directly connected to the cyclone chamber 33 and the gas separation chamber 36 formed in the casing 30 are formed therein, and passages 102, 104. Since the joining portion 112 connecting to the passage 114 is divided into the lid member 110, the design and manufacture of the passages 102, 104, the joining portion 112, the passage 114, and the like become relatively easy.

Although the embodiment for carrying out the present invention has been described in detail above, the present invention is not limited to such a specific embodiment and varies within the scope of the gist of the present invention described in the claims. Can be transformed / changed.

1 Pump unit 33 Cyclone chamber 36 Gas separation chamber 48 Gear pump (pump)
58 Communication hole (orifice)
59 Communication hole 100 Flow adjustment unit 102 Passage 104 Passage (some passages)
106 Adjustment valve 108 Intermediate member (mounting member)
110 Closure member (mounting member)
112 Confluence 114 Passages (continuous passages, connecting passages)

Claims (3)

With the casing
A pump provided in the casing and discharging the sucked liquid,
A cyclone chamber provided in the casing and separating the gas-enriched liquid from the liquid discharged from the pump.
A gas separation chamber provided in the casing and separating the gas from the gas enrichment liquid,
An orifice that allows the gas-enriched liquid to flow out of the cyclone chamber,
With the adjustment valve,
A plurality of passages provided in the first member attached to the casing and communicating with the gas separation chamber downstream of the orifice , the first passage arranged substantially coaxially with the orifice, and the said. An accommodating portion provided separately from the first passage and accommodating the adjusting valve, and an outflow portion provided at a position eccentric from the extending direction of the accommodating portion to allow the gas-enriched liquid to flow out toward the gas separation chamber. A second passage, including, and a plurality of passages .
A branch portion that branches from the orifice to the plurality of passages is provided.
The first member includes the plurality of passages, and has a first communication portion communicating with the cyclone chamber and a second communication portion communicating with the gas separation chamber .
The first communication portion and the second communication portion communicate with each other through a third communication portion provided in the second member attached to the first member.
The adjusting valve adjusts the amount of liquid flowing from the branch portion to the second passage according to the amount of gas mixed in the liquid by moving the valve body in the accommodating portion.
Pumping unit. The outflow portion has a flow path area larger than the flow path area of the first passage.
The pump unit according to claim 1. The first member and the second member are configured to be removable from the casing.
The pump unit according to claim 1 or 2.

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