JP2017078369A - Pump device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pump device capable of improving self-priming performance.SOLUTION: A pump device 10 comprises an impeller 50, a liner part 70, a cover 100, a motor 20, a rotating shaft 30, a flow passage part 110 which is provided protruding from an outer peripheral surface of the liner part 70 and is divided by a flow passage partition wall 115 into a discharge flow passage portion 116 and a return flow passage portion 117, and a gas-liquid separation part 120 divided by a gas-liquid separation wall 123 into a first gas-liquid separation chamber 136 which communicates with the discharge flow passage portion 116, and a second gas-liquid separation chamber 137 which communicates with the first gas-liquid separation chamber 136 above the gas-liquid separation wall 123 and with the return flow passage portion 117. An extending direction A1 of the gas-liquid separation wall 123 in the horizontal plane is inclined to a suction port part 71 side relative to an extending direction A2 of the flow passage partition wall 115 along the flow passage direction, so that the flow passage cross sectional area of the second gas-liquid separation chamber 137 in the horizontal direction becomes larger than the flow passage cross sectional area of the first gas-liquid separation chamber 136 in the horizontal direction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a self-priming pump device.

  For example, a self-priming pump device that supplies well water is known. The self-priming pump device includes a pump having an impeller, a motor that rotates the impeller, a discharge flow path section provided on the secondary side of the pump, a gas-liquid separation chamber provided on the secondary side of the discharge flow path section, and a gas-liquid A return channel portion provided on the secondary side of the separation chamber and communicating with the pump chamber of the pump;

  During the self-priming operation of the self-priming pump device, the pump chamber and the gas-liquid separation chamber are filled with expiratory water, and water is discharged to the secondary side by rotating the impeller. Water in the pump chamber is discharged to the secondary side, and negative pressure is generated in the pump chamber. By this negative pressure, air in the suction pipe connected to the suction port of the pump is sucked into the pump chamber, and water in the well is sucked up through the suction pipe.

  The water mixed with air in the pump chamber is separated in the gas-liquid separation chamber, and then returns to the pump chamber through the return channel. Thus, the self-priming operation is performed by circulating water between the pump chamber and the gas-liquid separation chamber.

  In addition, in a self-priming pump device, in order to prevent exhaled water from falling from the suction port during self-priming operation, the motor is placed horizontally and the suction port is placed at a high position with respect to the pump. (For example, refer to Patent Documents 1 and 2.)

JP 2005-248901 A JP 2007-315216 A

  The self-priming pump device described above is required to improve self-priming performance.

  Then, this invention aims at providing the pump apparatus which can improve self-priming performance.

  In order to solve the problems and achieve the object, the pump device of the present invention is configured as follows.

  As one aspect of the present invention, the pump device accommodates the impeller, the impeller, and a peripheral wall along the rotation direction of the impeller, and a suction port portion, a return port portion, a first port along the rotation direction of the impeller A liner portion in which discharge ports are sequentially formed, a cover covering the liner portion, a motor installed above the cover, a rotary shaft connected to the impeller and the motor, and an outer peripheral surface of the liner portion And a flow path section partitioned into a discharge flow path section that communicates with the first discharge port section, and a return flow path section that communicates with the return port section. A first gas-liquid separation chamber that is continuously provided in the flow path portion and communicates with the discharge flow path portion by a gas-liquid separation wall; and the first gas liquid separation wall above the first gas-liquid separation wall It communicates with the gas-liquid separation chamber and communicates with the return channel. A gas-liquid separation section that is partitioned into a second gas-liquid separation chamber and that has a second discharge port portion formed in a peripheral wall that defines the second gas-liquid separation chamber. The direction in which the wall extends in the horizontal plane is such that the horizontal channel cross-sectional area of the second gas-liquid separation chamber is larger than the horizontal channel cross-sectional area of the first gas-liquid separation chamber. It inclines in the said suction inlet part side with respect to the direction extended along the flow path direction of a partition.

  ADVANTAGE OF THE INVENTION According to this invention, the pump apparatus which can improve self-priming performance can be provided.

The side view which shows the pump apparatus which concerns on one Embodiment of this invention in a partial cross section. Sectional drawing which shows the liner part of the pump casing of the pump apparatus, a flow-path part main body, a gas-liquid separation part main body, and its vicinity. The side view which shows the state which looked at the pump apparatus from the angle different from FIG. 1 in a partial cross section. The graph which shows the performance of the pump apparatus.

  Hereinafter, a pump device 10 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4.

  FIG. 1 is a side view showing a partial cross section of a pump device 10 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing the liner part 70, the flow path part 110, the gas-liquid separation part main body 121 of the pump casing 60 of the pump device 10, and the vicinity thereof.

  FIG. 3 is a side view showing the pump device 10 in a partial cross-section when viewed from an angle different from that in FIG. FIG. 4 is a graph showing the performance of the pump device 10.

  As shown in FIG. 1, the pump device 10 is a self-priming pump device. The pump device 10 is configured, for example, so as to be able to pump water in a well by being installed on the ground. The pump device 10 includes a motor 20, a rotary shaft 30 connected to the motor 20, and a pump 40 to which the rotary shaft 30 is connected.

  The motor 20 includes a motor casing 21, a stator fixed in the motor casing 21, and a rotor provided in the stator.

  The rotating shaft 30 is fixed to the rotor and protrudes from the motor casing 21. The rotating shaft 30 has a key 31.

  As shown in FIGS. 1 and 3, the pump 40 is, for example, a vortex pump. The pump 40 includes an impeller 50, a pump casing 60 configured to receive the impeller 50 and support the motor 20, a seal member 130 that liquid-tightly arranges the end of the rotary shaft 30 in the pump casing 60, and the impeller 50. A retaining ring 140 to be fixed, a suction pipe 150 connected to the pump casing 60, and a discharge pipe 160 connected to the pump casing 60 are provided.

  The impeller 50 includes a disk-shaped base 51, a columnar boss 52 provided at the center of both main surfaces of the base 51, a blade 53 formed on the outer peripheral edge of both main surfaces of the base 51, and It has a hole portion 54 that penetrates the base portion 51 and both boss portions 52.

  The both sides and outer peripheral surface of the base 51 are opposed to the inner surface of the pump casing 60 with a predetermined gap.

  The boss portion 52 is formed in a cylindrical shape by the hole portion 54. The end surface and the outer peripheral surface of the boss portion 52 are opposed to the inner surface of the pump casing 60 with a predetermined gap.

  The blade portion 53 has a plurality of blade grooves 55 arranged at equal intervals on the outer peripheral edges of both main surfaces of the base portion 51 at a predetermined distance in the circumferential direction. The blade grooves 55 form a plurality of blades.

  The hole portion 54 has a cylindrical opening formed at the center of the base portion 51 and the pair of boss portions 52, and a keyway formed at a part of the inner peripheral surface of the opening. The rotary shaft 30 to which the key 31 is fixed is inserted into the hole 54, and the key 31 is engaged in the key groove.

  As shown in FIGS. 1 to 3, the pump casing 60 has a flow passage 91 that communicates a suction port portion 71 and a first discharge port portion 73 described later. The pump casing 60 covers the liner portion 70 that houses the impeller 50, the suction portion 80 connected to the primary side of the liner portion 70, the liner portion 70, and the cover 100 and the liner portion 70 that together with the liner portion 70 constitute the pump chamber 90. And a gas-liquid separation unit 120 formed continuously in the flow path part 110.

  The liner portion 70 is formed in a bottomed cylindrical shape. The liner portion 70 is formed so that the impeller 50 can be accommodated therein in a posture in which the rotation axis is parallel to the vertical direction. The inner surface of the liner portion 70 is formed in a shape having different inner diameters in accordance with the shape of the impeller 50.

  As shown in FIG. 2, the liner portion 70 has a suction port portion 71, a return port portion 72, and a first discharge port portion 73 formed on the peripheral wall 70 a. The suction port portion 71, the return port portion 72, and the first discharge port portion 73 are sequentially arranged in the rotation direction of the impeller 50. Specifically, the first discharge port portion 73 is formed adjacent to the return port portion 72. The suction port portion 71 is formed adjacent to the first discharge port portion 73.

  The suction inlet 71 is formed in a concave shape that opens to the upper edge of the peripheral wall 70a of the liner part 70, for example. When the cover 100 is attached to the liner portion 70, the concave suction port portion and the cover 100 constitute an opening. As another example, the suction inlet 71 may be composed of only the peripheral wall 70a.

  The return port portion 72 is formed at the bottom of the peripheral wall 70 a of the liner portion 70. Specifically, the return port portion 72 is formed in the vicinity of the ridge portion between the peripheral wall 70 a and the bottom wall portion of the liner portion 70. The opening cross-sectional area of the return port portion 72 is formed smaller than the opening cross-sectional area of the first discharge port portion 73. Specifically, the opening cross-sectional area is 25% to 30% of the first discharge port portion 73. Have. The height of the top part of the return port part 72 is lower than the height of the top part of the first discharge port part 73.

  The first discharge port portion 73 is formed in, for example, a concave shape opening at the upper edge of the peripheral wall 70a of the liner portion 70, and the cover 100 is attached to the liner portion 70, whereby the first discharge port having a concave shape is formed. The outlet 73 and the cover 100 constitute an opening.

  In the liner portion 70, a first flow path portion 92 that is a part of the flow path 91 between the suction port portion 71 and the first discharge port portion 73 is formed. The first flow path portion 92 is a substantially annular recess formed in the inner peripheral surface and the bottom surface of the liner portion 70.

  A first partition wall 74 that shields between the suction port portion 71 and the first discharge port portion 73 is formed in a portion of the liner portion 70 between the suction port portion 71 and the first discharge port portion 73. ing. The first partition wall 74 is a protrusion formed so as to be able to shield the portion between the first discharge port portion 73 and the suction port portion 71 in the first flow path portion 92.

  A first recess 76 in which one boss portion 52 of the impeller 50 can be disposed is formed at the center of the bottom surface 75 of the liner portion 70. The first recess 76 is a recess having an inner diameter substantially the same as the outer diameter of the boss portion 52.

  The suction part 80 is provided on the outer peripheral surface of the peripheral wall 70a of the liner part 70, and protrudes outward in a tubular shape. The suction part 80 communicates with the suction port part 71. Suction part 80 is formed so that suction pipe 150 can be connected.

  The channel 91 is formed between the suction port portion 71 and the first discharge port portion 73, and is formed so that water sucked from the suction port portion 71 can be supplied to the first discharge port portion 73. Yes.

  The cover 100 is detachably attached to the liner portion 70 by an attachment member such as a bolt, for example. The cover 100 is formed on the upper portion thereof so as to be able to support the motor 20.

  The cover 100 is provided at the center thereof, and is provided on the concave portion 101 that is recessed in a substantially cylindrical shape, the main surface on the inner peripheral surface side thereof, that is, the bottom surface facing the other main surface of the impeller 50, and constitutes the flow path 91 The second flow path portion 103 and the second partition wall 104 provided at a position facing the first partition wall 74.

  The recess 101 is formed at its center with an opening 101a into which the rotary shaft 30 is inserted and a seal groove 101b provided around the opening 101a. The recess 101 is provided with an opening 101a and a seal groove 101b on the same axis.

  The recess 101 is configured by the bottom surface of the cover 100 facing the other main surface of the base 51 of the impeller 50 projecting into a bottomed cylindrical shape. The concave portion 101 is a cylindrical recess having an inner diameter substantially the same as the outer diameter of one boss portion 52 of the impeller 50. The concave portion 101 is configured to have a height that can accommodate the other boss portion 52 of the impeller 50, a part of the rotating shaft 30, and the seal member 130.

  The opening 101a is formed with an inner diameter into which the rotary shaft 22 can be inserted. The seal groove 101b is disposed in the cover 100 around the opening 101a. The seal groove 101b is formed so that the seal member 130 can be disposed.

  The second flow path portion 103 is an arc-shaped depression provided on the bottom surface of the cover 100.

  The second partition 104 is a protrusion that is formed on the bottom surface and the peripheral surface and can shield a portion between the first discharge port portion 73 and the suction port portion 71. By combining the second partition wall 104 and the first partition wall 74, the space between the suction port portion 71 and the first discharge port portion 73 in a state where the liner portion 70 and the cover 100 are combined is shielded. The

  The flow path part 110 is formed continuously with the liner part 70, and projects outwardly with respect to the liner part 70 in a tubular shape. The flow path part 110 is formed integrally with the liner part 70, for example.

  The flow path part 110 has a ceiling wall 111 covering the upper surface, a bottom wall 112, a pair of side walls 113, 114 formed on the bottom wall 112, and a flow path part partition wall 115 formed on the bottom wall 112. Yes.

  Therefore, in the flow path part 110, a discharge flow path part 116 communicating with the first discharge port part 73 and a return flow path part 117 communicating with the return port part 72 are configured.

  The discharge flow path portion 116 includes a bottom wall 112, one side wall 114, a flow path partition wall 115, and a ceiling wall 111. Only a part of the ceiling wall 111 is shown in the figure. The discharge flow path part 116 has a shape in which the flow path cross-sectional area increases from the first discharge port part 73 toward the gas-liquid separation part 120.

  Specifically, the inner surface of the upstream portion of the side wall 114, that is, the inner surface of the portion on the first discharge port portion 73 side, from the first discharge port portion 73 to the suction portion 80 with respect to the flow path partition wall 115. It is inclined to the side, and extends from the midway portion to the downstream in parallel or substantially parallel to the flow path partition wall 115.

  The return flow path portion 117 is constituted by the bottom wall 112, the other side wall 113, the flow path partition wall 115, and the ceiling wall 111. The return channel portion 117 has a shape in which the channel cross-sectional area increases from the return port portion 72 toward the gas-liquid separation unit 120. Specifically, the inner surface of the side wall 113 is inclined with respect to the partition wall 115 for the flow path portion in the direction in which the cross section of the flow path expands, that is, on the opposite side with respect to the suction portion 80.

  The gas-liquid separation unit 120 is formed continuously with the flow path unit 110. For example, the gas-liquid separation unit 120 is disposed in a range surrounded by the pump 40, the suction pipe 150, and the discharge pipe 160. For this reason, the gas-liquid separation unit 120 is formed in a shape that does not interfere with the pump 40, the suction pipe 150, and the discharge pipe 160 that are disposed around. In the present embodiment, as shown in FIG. 3, the gas-liquid separator 120 is formed in, for example, a substantially triangular bottomed cylindrical shape.

  The gas-liquid separation unit 120 communicates with the discharge flow channel unit 116 and the return flow channel unit 117, separates the air in the exhalation water flowing from the discharge flow channel unit 116, and the exhaled water from which the air has been separated. It is configured to be able to return to the return flow path portion 117.

  As shown in FIGS. 2 and 3, the gas-liquid separation unit 120 is formed integrally with the flow path unit 110, for example, and covers the gas-liquid separation unit main body 121 whose upper end is open and the upper end opening of the gas-liquid separation unit main body 121. The gas-liquid separation unit cover 122, the gas-liquid separation wall 123 that divides the gas-liquid separation unit 120 into a first gas-liquid separation chamber 136 and a second gas-liquid separation chamber 137, and a flow rate detection device 124 are provided. Yes.

  The gas-liquid separation unit main body 121 is formed in a bottomed cylindrical shape having a substantially triangular shape in plan view with an upper end opened. Specifically, the gas-liquid separation unit main body 121 has a first side wall 125, a second side wall 126, and a third side wall 127.

  The flow path 110 is connected to the first side wall 125. The first side wall 125 is inclined with respect to the direction in which the flow path portion 110 extends. For example, the first side wall 125 is connected to the flow path partition wall 115 so as to be substantially orthogonal to the extending direction along the flow path direction of the flow path partition wall 115.

  The first side wall 125 is formed with an inflow port 128 communicating with the discharge flow path portion 116 and an outflow port 129 communicating with the return flow path portion 117.

  For example, the second side wall 126 is formed in parallel or substantially parallel to the direction from the suction pipe 150 toward the discharge pipe 160. The ridge between the second side wall 126 and the first side wall 125 is formed in an arc shape, and the inner surface is formed in a curved surface having a predetermined radius of curvature. The inner surface of the third side wall 127 is formed in parallel to the gas-liquid separation wall 123.

  The ridge between the third side wall 127 and the first side wall 125 is formed in an arc shape, and is formed in a curved surface having a predetermined radius of curvature on the inner surface. Specifically, the inner surface 127c of the ridge 127b between the third side wall 127 and the first side wall 125 is a height from the bottom surface 121a of the gas-liquid separator main body 121 to a second discharge port portion 135 described later. Where H is a curved surface having a radius of curvature of 0.2H or more.

  The ridge between the third side wall 127 and the second side wall 126 is formed in an arc shape, and the inner surface thereof is formed as a curved surface having a predetermined radius of curvature.

  The gas-liquid separation unit cover 122 is detachably attached to the gas-liquid separation unit main body 121 by, for example, an attachment member such as a bolt.

  The gas-liquid separation unit cover 122 is formed in a bottomed cylindrical shape having a substantially triangular shape in plan view. The gas-liquid separation unit cover 122 is attached to the gas-liquid separation unit main body 121 in such a posture that the opening faces the opening of the gas-liquid separation unit main body 121.

  A seal member 122 a is provided between the gas-liquid separator main body 121 and the gas-liquid separator cover 122. The seal member 122a is formed so as to be capable of liquid-tight sealing between the gas-liquid separator main body 121 and the gas-liquid separator cover 122.

  The gas-liquid separation unit cover 122 is arranged on the first side wall 125 so as to be flush with the first side wall 125, for example, and on the second side wall 126 so as to be flush with the second side wall 126 so as to be flush with the first side wall 125. 5 side walls and a third side wall 127, for example, a sixth side wall 134 arranged so as to be flush with each other in the vertical direction.

  The inner surface 132a of the fourth side wall 132 is formed with a groove 132b that can accommodate and fix an end portion of a second gas-liquid separation wall portion 123b described later.

  The fifth side wall is disposed at a position facing the fourth side wall 132. The ridges of the fifth side wall and the fourth side wall 132 are formed in an arc shape. This arc shape is substantially the same as the shape of the ridge between the first side wall 125 and the second side wall 126. The inner surfaces of the ridges between the fifth side wall and the fourth side wall 132 are formed as curved surfaces having a predetermined radius of curvature. This predetermined radius of curvature is substantially the same as the radius of curvature of the inner surface of the ridge between the first side wall 125 and the second side wall 126. The inner surface of the fifth side wall is formed with a groove that can accommodate and fix the end of the second gas-liquid separation wall portion 123b.

  A ridge 134b between the sixth side wall 134 and the fourth side wall 132 is formed in an arc shape. This arc shape is substantially the same as the arc shape of the ridge 127 b between the first side wall 125 and the third side wall 127. An inner surface 134c of a ridge 134b between the sixth side wall 134 and the fourth side wall 132 is formed as a curved surface having a predetermined radius of curvature.

  Specifically, the inner surface 134c of the ridge 134b between the inner surface 134a of the sixth sidewall 134 and the inner surface of the fourth sidewall 132 is the inner surface 127c of the ridge 127b between the third sidewall 127 and the first sidewall 125. It is formed in the curved surface which becomes the same. More specifically, the inner surface of the ridge 134b between the sixth sidewall 134 and the fourth sidewall is the same as the ridge 127b between the inner surface 127a of the third sidewall 127 and the inner surface 125a of the first sidewall 125. The curved surface has a radius of curvature, and the radius of curvature is 0.2H or more.

  A second discharge port portion 135 to which the discharge pipe 160 is connected is formed on the upper portion of the sixth side wall 134.

  In addition, a water injection port 122b for priming water injection is formed in, for example, the upper part of a first gas-liquid separation chamber 136 described later of the gas-liquid separation unit cover 122. The water inlet is provided with a detachable cap. The water inlet 122b is indicated by a two-dot chain line in the figure.

  The gas-liquid separation wall 123 includes, for example, a first gas-liquid separation wall portion 123a formed in the gas-liquid separation portion main body 121 and a second gas-liquid separation wall portion formed in the gas-liquid separation portion cover 122. 123b.

  The first gas-liquid separation wall portion 123 a is formed to protrude upward from the bottom surface 121 a of the gas-liquid separation portion main body 121, and extends from the first side wall 125 to the second side wall 126. The first gas-liquid separation wall portion 123a is connected to a portion of the first side wall 125 where the flow path partition wall 115 is connected.

  For example, the second gas-liquid separation wall portion 123b includes an end portion of a plate member formed as a separate member with respect to the gas-liquid separation portion cover 122, a groove 132b formed in the fourth side wall 132, and It is configured by being placed and fixed in a groove formed in the fifth side wall 133.

  A space between the second gas-liquid separation wall portion 123b and the first gas-liquid separation wall portion 123a is liquid-tightly sealed by a seal member 122a. Note that the second gas-liquid separation wall portion 123b may be formed integrally with the gas-liquid separation portion cover 122.

  Thus, the gas-liquid separation wall 123 is formed in one wall shape by arranging the first gas-liquid separation wall portion 123a and the second gas-liquid separation wall portion 123b in the vertical direction.

  The gas-liquid separation wall 123 is formed so that the gas-liquid separation unit 120 can be partitioned into a first gas-liquid separation chamber 136 and a second gas-liquid separation chamber 137.

  The gas-liquid separation wall 123 has a height having a gap 138 between its upper end and the upper surface of the gas-liquid separation unit cover 122. That is, the second gas-liquid separation wall portion 123b has a height having a gap 138 between the upper end thereof and the upper surface of the gas-liquid separation portion cover 122. Through the gap 138, the first gas-liquid separation chamber 136 and the second gas-liquid separation chamber 137 communicate with each other.

  The gas-liquid separation wall 123 extends toward the second side wall 126 from a portion where the flow path partition wall 115 is connected to the first side wall 125. In the gas-liquid separation wall 123, the extending direction A1 in the horizontal plane is inclined with respect to the extending direction A2 along the flow path direction of the flow path partition wall 115. Specifically, in the direction A2 in which the gas-liquid separation wall 123 extends, the horizontal channel cross-sectional area of the second gas-liquid separation chamber 137 is equal to the horizontal channel cross-sectional area of the first gas-liquid separation chamber 136. It inclines to the suction inlet part 71 side so that it may become larger.

  More specifically, in the gas-liquid separation wall 123, the horizontal channel cross-sectional area of the second gas-liquid separation chamber 137 is 300% of the horizontal channel cross-sectional area of the first gas-liquid separation chamber 136. The extending direction A1 is inclined with respect to the extending direction A2 of the flow path partition wall 115 so as to be ˜500%. The inclination angle α of the direction A1 with respect to the direction A2 is, for example, 30 degrees to 35 degrees. The horizontal channel cross-sectional area is a cross-sectional area perpendicular to the vertical direction.

  In the present embodiment, as an example, the gas-liquid separation wall 123 has the side walls 127 and 134 side surfaces parallel to the inner surfaces of the side walls 127 and 134, and the extending direction A1 is parallel to the suction portion 80 and the suction pipe 150. So that the flow path partition wall 115 extends in the direction A2.

  Further, the inner surfaces of the side walls constituting the gas-liquid separation wall 123 and the gas-liquid separation unit 120 are parallel to the vertical direction, and therefore, at least in the range from the bottom surface 121a to the upper end of the gas-liquid separation wall 123, The horizontal cross-sectional area of the first gas-liquid separation chamber 136 is constant in the vertical direction, and the horizontal cross-sectional area of the second gas-liquid separation chamber 137 is constant in the vertical direction. is there.

  The flow rate detection device 124 is configured to be able to detect the flow rate of water flowing through the gap 38. The flow rate detection device 124 is disposed, for example, on the top of the gas-liquid separation unit cover 122. The flow rate detection device 124 is, for example, a paddle type flow rate detection device.

  As shown in FIG. 1, the seal member 130 is formed so as to be able to seal between the outer peripheral surface of the rotating shaft 30 and the opening 101 a of the cover 100. The seal member 130 is a mechanical seal, for example. The seal member 130 includes a rotary ring provided on the outer peripheral surface of the rotary shaft 30 and a fixed ring fixed to the seal groove 101b, and the rotary ring and the fixed ring slide to slide between the rotary shaft 30 and the cover 100. To seal.

  The retaining ring 140 has a cylindrical shape into which the rotating shaft 30 can be inserted. The retaining ring 140 is fixed to the rotating shaft 30 by, for example, a so-called enamel set or a set screw 81 called a set screw. The retaining ring 140 is fixed to the rotating shaft 30 to fix the impeller 50 at a predetermined position on the rotating shaft 30. Here, the predetermined position is a position that is appropriately set or adjusted according to the gap between the impeller 50 and the pump casing 60.

  The suction pipe 150 is connected to the suction part 80. The suction pipe 150 is formed so as to be connectable to a water supply pipe for supplying water from the well. The suction pipe 150 is provided with a check valve 151.

  The discharge pipe 160 is configured by connecting a plurality of pipe members, for example, and is connected to the second discharge port portion 135. The discharge pipe 160 is formed to be connectable to a pipe that supplies water to a water supply destination.

  Next, the self-priming operation of the pump device 10 will be described. First, exhaled water is injected from the water injection port 122b into the gas-liquid separation chamber. The expiratory water fills up to the pump chamber 90 through the first discharge port portion 73 and the return port portion 72. Excess water supplied excessively is discharged through the second outlet 135. For this reason, the depth of the expiratory water in the second gas-liquid separation chamber 137 when the expiratory water is full is H.

  The motor 20 is driven when the power is turned on after injecting exhalation water. When the motor 20 is driven, a negative pressure is generated in the pump chamber 90, and the negative pressure causes the air in the suction portion 80 and the suction pipe 150 to be sucked into the pump chamber 90 and through the suction pipe 150. Of water is sucked up.

  The air sucked into the pump chamber 90 is mixed with water and flows into the first gas-liquid separation chamber 136 through the first discharge port portion 73 and the discharge flow path portion 116.

  The water that has flowed into the first gas-liquid separation chamber 136 passes over the gas-liquid separation wall 123 and flows into the second gas-liquid separation chamber 137 through the gap 138. The water that has flowed into the second gas-liquid separation chamber 137 is separated from the mixed air when the water flow flowing to the return flow path portion 117 is settled, and passes through the return flow path portion 117 and the return port portion 72 again. Return to pump chamber 90.

  The pump device 10 configured as described above can improve the self-priming performance while reducing the installation area of the pump device 10.

  Specifically, the pump 40 is configured such that the impeller 50 has a posture in which the rotation axis thereof is in the vertical direction, and the motor 20 is disposed above the cover 100, so that the installation area of the pump device 10 is kept compact. can do.

  Furthermore, by inclining the direction A1 in which the gas-liquid separation wall 123 extends to the suction port 71 side with respect to the direction A2 in which the flow path partition wall 115 extends, without increasing the volume of the gas-liquid separation unit 120, The horizontal flow path cross-sectional area of the second gas-liquid separation chamber 137 can be made larger than the horizontal flow path cross-sectional area of the first gas-liquid separation chamber 136. In the second gas-liquid separation chamber 137, the horizontal channel cross-sectional area of the second gas-liquid separation chamber 137 is made larger than the horizontal channel cross-sectional area of the first gas-liquid separation chamber 136. Since the flow rate at the time of sedimentation of water can be slowed, the gas-liquid separation action can be promoted.

  Since the gas-liquid separation action is promoted, the amount of air in the expiratory water that returns through the return flow passage 117 can be reduced, so that the self-priming performance can be improved.

  Thus, the pump device 10 can improve the self-priming performance while maintaining its installation area compact.

  Further, by making the gas-liquid separation unit 120 substantially triangular in plan view, in the gas-liquid separation chambers 136 and 137 partitioned by the gas-liquid separation wall 123, the horizontal flow path of the second gas-liquid separation chamber 137 The cross-sectional area can be made larger than the horizontal cross-sectional area of the first gas-liquid separation chamber 136.

  Specifically, the gas-liquid separation unit 120 has a substantially triangular shape in plan view, so that the flow channel width of the discharge flow channel unit 116 and the flow channel width of the return flow channel unit 117 are sufficiently secured. Even in the structure in which the partition wall 115 is connected to the central portion of the first side wall 125, the room including the triangular apex in the pair of rooms partitioned by the gas-liquid separation wall 123 is smaller than the other. That is, the horizontal channel cross-sectional area of the second gas-liquid separation chamber 137 can be made larger than the horizontal channel cross-sectional area of the first gas-liquid separation chamber 136.

  As described above, the pump device is configured by making the horizontal flow passage cross-sectional area of the second gas-liquid separation chamber 137 larger than the horizontal flow passage cross-sectional area of the first gas-liquid separation chamber 136 with a simple configuration. The suction lift of 10 can be increased.

  FIG. 4 is a graph showing the performance of the pump device 10. The horizontal axis of FIG. 4 shows the passage of time, and the vertical axis shows the suction head.

  In FIG. 4, the gas-liquid separation chamber ratio is 100%, that is, the horizontal channel cross-sectional area of the first gas-liquid separation chamber 136 and the horizontal channel cross-sectional area of the second gas-liquid separation chamber 137 are as follows. The second gas-liquid separation with respect to the pump device having the same gas-liquid separation unit and the gas-liquid separation chamber ratio of 300%, that is, with respect to the horizontal channel cross-sectional area of the first gas-liquid separation chamber 136 The performance with a pump device having a gas-liquid separation part in which the horizontal cross-sectional area of the chamber is three times as large is shown.

  In FIG. 4, the gas-liquid separation chamber ratio is 500%, that is, the horizontal flow of the second gas-liquid separation chamber 137 with respect to the horizontal flow path cross-sectional area of the first gas-liquid separation chamber 136. The inner surface of the ridge 127b of the first side wall 125 and the third side wall 127 and the inner surface of the ridge 134b of the fourth side wall 132 and the sixth side wall 134 are increased by a factor of five. The performance of the pump device 10 having a curved surface with a radius of curvature of 0.1H or a radius of curvature of 0.25H is shown.

  As shown in FIG. 4, the suction head is increased by increasing the ratio of the horizontal channel cross-sectional area of the second gas-liquid separation chamber 137 to the horizontal channel cross-sectional area of the first gas-liquid separation chamber 136. Can be seen to improve.

  In particular, as in the present embodiment, the horizontal channel cross-sectional area of the second gas-liquid separation chamber 137 is 300% to 500% of the horizontal channel cross-sectional area of the first gas-liquid separation chamber 136. By doing so, it is understood that the suction head can be increased.

  Further, by providing the return port portion 72 at the bottom of the peripheral wall 70a of the liner portion 70, it is possible to prevent the air in the expired water from reaching the return port portion 72, so that the self-priming performance can be improved.

  Moreover, by making the height of the topmost part of the return port part 72 lower than the height of the topmost part of the first discharge port part 73, it is more possible that the air in the expiratory water reaches the return port part 72. This can be further prevented.

  Further, by setting the opening cross-sectional area of the return port portion 72 to 25% to 35% of the opening cross-sectional area of the first discharge port portion 73, the amount of water returning through the return port portion 72 is reduced with respect to the self-priming operation. The amount of water pumping after completion of the self-priming operation is not reduced while securing a sufficient amount.

  In addition, on the inner surface of the second gas-liquid separation chamber 137, the inner surface 127c of the ridge 127b between the first side wall 125 and the third side wall 127, which is a portion continuous with the return flow path portion 117, and the fourth The curved surface having a radius of curvature of 0.2H or more when the height from the bottom surface 121a to the second discharge port part 135 is defined as H on the inner surface 123c of the ridge part 134b of the side wall 132 and the sixth side wall 134. By doing so, a swirling flow can be generated in the water flowing in the second gas-liquid separation chamber 137.

  Due to this swirling flow, fine air in the expiratory water that has not been separated when settling in the second gas-liquid separation chamber 137 gathers at the center of the swirling flow to form an air mass. By forming the air mass, the air mass is separated from the expiratory water that settles in the second gas-liquid separation chamber 137. For this reason, since the fine air in water which could not be separated by the gas-liquid separation wall 123 can be separated, the self-priming performance can be improved.

  As shown in FIG. 4, as in the present embodiment, the inner surfaces of the ridges 127 b and 134 b that are continuous with the return flow path portion 117 are formed from the bottom surface 121 a on the inner surface of the second gas-liquid separation chamber 137. It can be seen that the time until the self-priming operation is completed is shortened when 0.25H is set, compared to 0.1H when the height to the second discharge port portion 135 is H. That is, it can be seen that the self-priming performance is improved.

  Further, by making the inner surface 127a of the third side wall 127 of the gas-liquid separation unit 120 and the inner surface 134a of the sixth side wall 134 parallel to the surfaces of the gas-liquid separation wall 123 on the side walls 127 and 134 side, While preventing the enlargement of the separation unit 120, the horizontal flow path cross section of the second gas-liquid separation chamber 137 is made larger than the horizontal flow path cross section of the first gas-liquid separation chamber 136, and It is possible to easily generate a swirling flow at the portions 127b and 134b.

  This point will be specifically described. When the inner surfaces 127a and 134a of the side walls 127 and 134 are inclined so as to approach the gas-liquid separation wall 123, the horizontal flow path cross section of the second gas-liquid separation chamber 137 becomes small. Furthermore, the radius of curvature at the ridges 127b and 134b cannot be increased. Moreover, if the inner surfaces 127a and 134a of the side walls 127 and 134 are inclined so that the inner surfaces of the side surfaces 127 and 134 are separated from the gas-liquid separation wall 123, the gas-liquid separation unit 120 itself becomes larger.

  Thus, as in this embodiment, the inner surface 127a of the third side wall 127 of the gas-liquid separation unit 120 and the inner surface 134a of the sixth side wall 134 are connected to the side walls 127 and 134 of the gas-liquid separation wall 123. By making the plane parallel to the surface, the horizontal flow path cross section of the second gas-liquid separation chamber 137 is made to flow in the horizontal direction of the first gas-liquid separation chamber 136 while preventing the gas-liquid separation section 120 from becoming large. It is possible to make the swirl flow easier to generate at the ridges 127b and 134b than the road cross section.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments. For example, you may delete some components from all the components shown by embodiment mentioned above.

  DESCRIPTION OF SYMBOLS 10 ... Pump apparatus, 20 ... Motor, 30 ... Rotating shaft, 50 ... Impeller, 70 ... Liner part, 70a ... Peripheral wall, 71 ... Suction port part, 72 ... Return port part, 73 ... 1st discharge port part, 100 ... Cover 110, flow path section 115, partition wall for flow path section 116, discharge flow path section 117, return flow path section 120, gas / liquid separation section 123, gas / liquid separation wall 135 th 2 discharge ports, 136... First gas-liquid separation chamber, 137... Second gas-liquid separation chamber.

Claims (5)

Impeller,
A liner portion in which the impeller is accommodated, and a suction port portion, a return port portion, and a first discharge port portion are sequentially formed on the peripheral wall along the rotation direction of the impeller along the rotation direction of the impeller;
A cover covering the liner portion;
A motor installed above the cover;
A rotating shaft connected to the impeller and the motor;
Protruding from the outer peripheral surface of the liner portion, the inside is partitioned by a partition into a discharge flow channel portion communicating with the first discharge port portion and a return flow channel portion communicating with the return port portion. A flow path section;
A first gas-liquid separation chamber that is continuously provided in the flow channel portion and communicates with the discharge flow channel portion by a gas-liquid separation wall, and the first gas gas separation portion above the gas-liquid separation wall. A second gas-liquid separation chamber that communicates with the gas-liquid separation chamber and communicates with the return channel, and a second discharge port portion is formed in a peripheral wall that defines the second gas-liquid separation chamber. Gas-liquid separator,
Comprising
The direction in which the gas-liquid separation wall extends in the horizontal plane is such that the horizontal cross-sectional area of the second gas-liquid separation chamber is larger than the horizontal cross-sectional area of the first gas-liquid separation chamber. The pump device is characterized by being inclined toward the suction port side with respect to a direction extending along the flow path direction of the partition wall. The pump device according to claim 1, wherein the return port is formed at a bottom portion of the peripheral wall of the liner portion. The pump device according to claim 1, wherein the opening cross-sectional area of the return port has a size of 25% to 35% of the opening cross-sectional area of the first discharge port portion. The portion of the inner surface of the second gas-liquid separation chamber that is continuous with the inner surface of the return flow path portion is 20% or more of the height from the bottom surface of the second gas-liquid separation chamber to the second discharge port portion. The pump device according to claim 1, wherein the pump device is formed into a curved surface having a curvature radius of The horizontal cross-sectional area of the second gas-liquid separation chamber is 300% to 500% of the horizontal cross-sectional area of the first gas-liquid separation chamber. The pump device described in 1.