JP2006037843A - Self priming pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a self priming pump showing high gas water separation effect and providing high water suction head. <P>SOLUTION: A first casing 12 and a second casing 14 partitioned by a partition plate 22 are formed. A pump chamber 30 and a second tank chamber 32 are formed inside of the second casing 14. A first tank chamber 13 is formed inside of the first casing 12. Water flowing-in from an inlet 16 provided on the first casing 12 flows in the first tank chamber 13 through an inlet pipe 18, a pump chamber 30 and the second tank chamber 32. Flowing-in water flows in a direction of an outlet 78 by a straightening plate 106 and is circulated inside of the first tank chamber 13 by a circulation passage 112. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a self-priming pump.

  Conventionally, various self-priming pumps for sucking water and sending it to a predetermined place have been proposed (Patent Document 1).

  In such a self-priming pump, a first casing having an inlet for sucking water and an outlet for discharging water, a second casing, and a space between the first casing and the second casing are provided. There is a self-priming pump having a partition plate provided and an impeller disposed inside the second casing.

This self-priming pump has a structure in which an impeller is rotated by a motor to suck water from an inlet and discharge it from an outlet.
Japanese Patent Laid-Open No. 2003-114052

  In the self-priming pump as described above, since air is simultaneously sucked when water is sucked from the inlet, it is necessary to perform air-water separation when discharging, and it is desirable that the air-water separation effect is higher.

  In addition, in the self-priming pump, when the water absorption height increases, there is a problem that the self-priming time is prolonged and the self-priming becomes impossible.

  Therefore, in view of the above problems, the present invention provides a self-priming pump that has a high effect of air-water separation and that can provide a high water absorption head.

  According to the first aspect of the present invention, a first casing made of synthetic resin and a second casing made of synthetic resin are arranged via a partitioning portion, a mouth portion is opened in the partitioning portion, and a lower portion of the first casing is provided. A fluid inlet and outlet are formed, a first tank chamber is formed inside the first casing, a lower portion of the first tank chamber communicates with the outlet, and the first tank is formed inside the first casing. The chamber is formed with a partitioned inlet pipe, a lower end of the inlet pipe communicates with the inlet, an upper end of the inlet pipe communicates with the mouth portion, and a second tank chamber is formed at the upper portion of the second casing. A pump chamber is formed in the lower part of the second casing, and an impeller is rotatably disposed in the pump chamber, and a part of the impeller is inserted into the mouse portion, and a motor for rotating the impeller is provided. The first tank chamber A communication port through which the second tank chamber communicates opens at an upper portion of the partition portion, and a circulation passage through which a fluid flows between the wall portion of the first tank chamber and the inlet pipe is formed by the motor. A self-priming pump that rotates an impeller, sucks fluid from the inlet, and discharges the fluid from the outlet through the inlet pipe, the pump chamber, the second tank chamber, and the first tank chamber. is there.

  According to a second aspect of the present invention, the first casing made of synthetic resin and the second casing made of synthetic resin are arranged through the partition portion, and the mouth portion is opened in the partition portion, and the lower portion of the first casing is A fluid inlet and outlet are formed, a first tank chamber is formed inside the first casing, a lower portion of the first tank chamber communicates with the outlet, and the first tank is formed inside the first casing. The chamber is formed with a partitioned inlet pipe, a lower end of the inlet pipe communicates with the inlet, an upper end of the inlet pipe communicates with the mouth portion, and a second tank chamber is formed at the upper portion of the second casing. A pump chamber is formed in the lower part of the second casing, and an impeller is rotatably disposed in the pump chamber, and a part of the impeller is inserted into the mouse portion, and a motor for rotating the impeller is provided. The first tank chamber A communication port through which the second tank chamber communicates opens at an upper portion of the partition portion, and a partition plate extends along the wall portion of the first casing from the vicinity of the wall portion where the outlet opens in the first tank chamber. A rectifying plate is formed in the first tank chamber so as to be inclined downward from the vicinity of the communication port toward the outlet toward the tip, and the impeller is driven by the motor. It is a self-priming pump that rotates and sucks fluid from the inlet and discharges it from the outlet through the inlet pipe, the pump chamber, the second tank chamber, and the first tank chamber.

  The invention according to claim 3 is the self-priming pump according to claim 1 or 2, wherein the motor is a brushless DC motor.

  In the self-priming pump according to the first aspect of the present invention, since the circulation passage through which the fluid flows is formed between the wall portion of the first tank chamber and the inlet pipe, the second tank chamber to the first tank chamber. Since the water that has flowed into the first tank chamber can circulate in the first tank chamber by this circulation passage, even if it is an air-water mixture when it comes out from the communication port, the air-water separation can be performed by this circulation effect. it can. Therefore, a high water absorption head can be obtained.

  In the self-priming pump of the invention according to claim 2, the partition plate extends from the outlet to the vicinity of the upper portion of the first tank chamber, and the rectifying plate is inclined downward from the vicinity of the communication port toward the outlet. Therefore, even when the gas / water mixture comes out of the communication port, it can be separated when it flows along the current plate. Therefore, a high water absorption head can be obtained.

  Hereinafter, a self-priming pump 10 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3.

  1 is a longitudinal sectional view of the self-priming pump 10, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. 3 is a sectional view taken along line BB in FIG.

(1) Configuration of Self-Priming Pump 10 The casing of the self-priming pump 10 includes a first casing 12 made of synthetic resin and a second casing 14 made of synthetic resin.

  A packing 20 and a partition plate 22 are disposed between the first casing 12 and the second casing 14. A circular opening 24 is opened in the packing 20, and a circular mouse part 26 is opened at the position of the partition plate 22 corresponding thereto. The outer diameter of the opening 24 is formed larger than the outer diameter of the mouse part 26.

  The first casing 12 and the second casing 14 have flanges 82 and 84 projecting from each other, and the flanges 82 and 84 are fixed with a plurality of screws 86 so that the first casing 12 and the second casing 14 are packed. It fixes so that 20 and the partition plate 22 may be pinched | interposed.

  A first tank chamber 13 is provided inside the first casing 12 partitioned by the partition plate 22. In addition, an inlet 16 for sucking water is provided on the left side of the lower portion of the first casing, and an inlet pipe 18 extends from the inlet 16 to the inside of the first casing 12. As shown in FIG. 2, the inlet pipe 18 is separated from the first tank chamber 13 and is configured not to circulate water. An outlet 78 is provided on the right side of the lower portion of the first casing 12. Further, a partition wall 100 is provided in the vicinity of the outlet 78 and parallel to the right wall portion of the first casing 12 as shown in FIG. The partition wall 100 extends upward from the lower side of the outlet 78 along the right wall portion of the first casing 12 as described above, and is provided to the vicinity of the upper end portion of the first casing 12. Further, the second partition wall 102 extends further downward from the upper wall portion of the first casing 12 inside the partition wall 100. However, the length of the second partition wall 102 is formed to be slightly larger than the dimension of the water passage 104 between the partition wall 100 and the upper wall portion of the first casing 12.

  In the vicinity of the upper part of the left side of the partition plate 22 in the first casing 12, a communication port 76 with the second tank chamber 32 to be described later is opened. Return holes 116 and 114 are opened on the side. A rectifying plate 106 protrudes from the left wall portion of the first casing 12 below the communication port 76. The rectifying plate 106 is inclined downward toward the tip in FIG. A water passage 108 is provided between the partition wall 100.

  As shown in FIG. 2, a circulation passage 112 for circulating water is provided between the upper end opening of the inlet pipe 18 and the wall 110 of the first casing 12.

  A lower part of the second casing 14 is provided with a pump chamber 30 in which an impeller 28 is rotatably arranged. A second tank chamber 32 for storing exhaled water is provided above the pump chamber 30. The packing 20 and the partition plate 22 are each provided with a communication port 76 so that water flows between the second tank chamber 32 and the first tank chamber 13.

  In the impeller 28, a boss 36 is provided at the center of the circular plate 34, and a plurality of blades 38 are provided around the boss 36. A ring plate 40 is provided on the opposite side of the plurality of blades 38 from the circular plate 34, and an inner diameter side of the ring plate 40 projects in the axial direction to form a cylindrical projecting portion 42. The portion of the outer periphery between the adjacent blades 38 is open. Further, the protruding portion 42 is inserted into the mouth portion 26 of the partition plate 22, and a gap S <b> 1 is provided between the outer diameter of the protruding portion 42 and the inner diameter of the mouth portion 26.

  A step 44 is provided at the edge of the second casing 14, and the edge of the partition plate 22 is fitted into the step 44, and the partition 22 is fixed to the second casing 14 with screws 46 and 48. . A gap S <b> 2 is provided between the step 44 of the second casing 14 and the edge of the partition plate 22.

  A motor 50 is attached to the second casing 14.

  The motor 50 is a brushless DC motor and a molded motor, and a ring-shaped stator 52 of the motor 50 and a wiring board 54 incorporating a drive circuit of the motor 50 are molded with a molding resin to form a frame of the motor 50. 56 is formed.

  A cylindrical and bottomed can 58 extending from the second casing 14 is inserted on the inner peripheral side of the ring-shaped frame 56. A rotor 60 is disposed on the inner periphery of the can 58. The rotating shaft 62 of the rotor 60 is rotatably arranged by a pair of bearings 64 and 66, and the tip end portion of the rotating shaft 62 is fitted and fixed to the boss 36 of the impeller 28.

  A bearing 64 opposite to the output side of the rotating shaft 62 is fixed to the bottomed portion 68 of the can 58. A bearing support portion 70 that supports the bearing 66 is provided separately from the second casing 14, and the bearing support portion 70 is fixed to the base portion of the can 58 with a screw 72. A shaft through hole 74 through which the rotary shaft 62 passes is opened in the bearing support portion 70, and a cylindrical portion 75 projects from the edge portion of the shaft through hole 74 toward the motor 50. An output-side bearing 66 is fixed on the circumferential side. Further, the bearing support portion 70 is provided with a plurality of flow through holes 71 for circulating water inside the can 58 and for removing bubbles accumulated in the can 58.

  Thus, the motor 50 is a mold motor, and a bottomed can 58 is inserted into a frame 56 made of a mold resin, and the rotor 60 is rotatably arranged inside the can 58. Further, since the stator 52 and the wiring board 54 are molded, the wiring board 54 does not touch the water and fail.

  As shown in FIG. 3, the second tank chamber 32 is located above the pump chamber 30, and the water sent from the impeller 28 passes through the pump chamber 30 once and is provided in the packing 20 and the partition plate 22. It flows into the first casing 12 through the communication port 76.

  The upper surface of the second tank chamber 32 is provided with a priming inlet 80 for priming.

(2) Operational state of self-priming pump 10 The self-priming operational state of the self-priming pump 10 having the above configuration will be described.

  First, although not described in the inlet 16, a check valve and a water absorption pipe are connected.

  Next, exhalation water is put in advance from the second inlet 80, and the first tank chamber 13, the second tank chamber 32, the pump chamber 30, and the inlet pipe 18 are filled with water.

  When the impeller 28 is rotated by driving the motor 50, the air is sucked from the inlet 16, passes through the inlet pipe 18, passes through the inside of the projecting portion 42 of the impeller 28 inserted into the mouse portion 26, and the outer periphery of the blade 38. The pump chamber 30 reaches the second tank chamber 32 through the section. The water (air / water mixture) that has reached the second tank chamber 32 reaches the first tank chamber 13 through the communication port 76.

  The air / water mixture that has entered the first tank chamber 13 flows downward along the current plate 106. Therefore, the steam and water can be separated when flowing along the current plate 106. In addition, when flowing downward along the current plate 106 and flowing below the first tank chamber 13 via the passage 108, water circulates in the circulation passage 112 around the upper end opening of the inlet pipe 18. Then, the inside of the first tank chamber 13 is circulated. Therefore, the air and water can be further separated during the circulation, and the water passes through the return holes 114 and 116 to the pump chamber 30, and the air passes under the second partition wall 102 and passes through the passage 104. Exhaust to the outlet 78 through the space between the two partition walls 102 and the wall of the first casing 12. Thus, by the progress of air-water separation, a high water absorption head can be obtained and the self-priming time can be shortened. When the air in the water absorption pipe runs out and water reaches the pump 10, the self-priming action is completed, the pump 10 is completely filled with water, and water is sent from the outlet 78.

(Example of change)
The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist thereof.

  For example, although a brushless DC motor is used as the motor 50 in the above embodiment, other induction motors or synchronous motors may be used.

  The self-priming pump of the present invention can be used as a pump for feeding water and other fluids such as a home well pump, a washing machine pump, and a water heater.

It is a longitudinal section of a self-priming pump showing one embodiment of the present invention. It is the sectional view on the AA line in FIG. It is the BB sectional view taken on the line in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Self-priming pump 12 1st casing 13 1st tank chamber 14 2nd casing 16 Inlet 18 Inlet pipe 22 Partition plate 26 Mouse part 28 Impeller 30 Pump chamber 32 2nd tank chamber 42 Projection part 44 Step part 46 Screw 48 Screw DESCRIPTION OF SYMBOLS 50 Motor 52 Stator 54 Wiring board 56 Frame 58 Cylinder part 60 Rotor 62 Rotating shaft 68 Bottomed part 76 Opening part 78 Exit 100 Partition wall 102 2nd partition wall 104 Path 106 Current plate 108 Path 110 Wall part 112 Circulation path 114 Return hole 116 Return hole

Claims (3)

The first casing made of synthetic resin and the second casing made of synthetic resin are arranged via the partitioning part,
A mouse part opens in the partition part,
A fluid inlet and outlet are formed in the lower portion of the first casing,
A first tank chamber is formed inside the first casing, and a lower portion of the first tank chamber communicates with the outlet,
An inlet pipe partitioned from the first tank chamber is formed inside the first casing, a lower end of the inlet pipe communicates with the inlet, an upper end of the inlet pipe communicates with the mouth portion,
A second tank chamber is formed in the upper part of the second casing, and a pump chamber is formed in the lower part of the second casing;
An impeller is rotatably arranged in the pump chamber and a part of the impeller is inserted into the mouse part,
A motor for rotating the impeller is provided;
A communication port through which the first tank chamber and the second tank chamber communicate with each other opens at an upper portion of the partition;
A circulation path through which a fluid flows is formed between the wall of the first tank chamber and the inlet pipe,
The impeller is rotated by the motor, the fluid is sucked from the inlet, and discharged from the outlet through the inlet pipe, the pump chamber, the second tank chamber, and the first tank chamber. Suction pump. The first casing made of synthetic resin and the second casing made of synthetic resin are arranged via the partitioning part,
A mouse part opens in the partition part,
A fluid inlet and outlet are formed in the lower portion of the first casing,
A first tank chamber is formed inside the first casing, and a lower portion of the first tank chamber communicates with the outlet,
An inlet pipe partitioned from the first tank chamber is formed inside the first casing, a lower end of the inlet pipe communicates with the inlet, an upper end of the inlet pipe communicates with the mouth portion,
A second tank chamber is formed in the upper part of the second casing, and a pump chamber is formed in the lower part of the second casing;
An impeller is rotatably arranged in the pump chamber and a part of the impeller is inserted into the mouse part,
A motor for rotating the impeller is provided;
A communication port through which the first tank chamber and the second tank chamber communicate with each other opens at an upper portion of the partition;
In the first tank chamber, a partition plate extends from the vicinity of the wall portion where the outlet is opened along the wall portion of the first casing to the vicinity of the upper portion of the first tank chamber,
In the first tank chamber, a rectifying plate is formed so as to be inclined downward toward the outlet from the vicinity of the communication port,
The impeller is rotated by the motor, the fluid is sucked from the inlet, and discharged from the outlet through the inlet pipe, the pump chamber, the second tank chamber, and the first tank chamber. Suction pump. The self-priming pump according to claim 1 or 2, wherein the motor is a brushless DC motor.

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