JP4386951B2 - Self-priming pump device - Google Patents

Description

  The present invention relates to a self-priming pump device suitable for being mounted on a washing machine such as a fully automatic washing machine and a washing / drying machine for home use to absorb remaining hot water in a bath.

  Conventionally, a washing machine such as a fully automatic washing machine and a washing / drying machine for home use is equipped with a self-priming pump device for using bath water or the like as washing water mainly for the purpose of saving water. As this self-priming pump device, a relay pipe connecting the suction cylinder and the pump runner storage chamber is arranged so as to penetrate the vicinity of the center of the air-water separation chamber, and the pump runner storage chamber is surrounded by the pump runner. And a water guide wall having a discharge opening for discharging the fluid pushed to the outside of the pump runner by the rotational centrifugal force of the pump runner from the pump runner storage chamber to the steam-water separation chamber. The fluid flow passes between the relay pipe and the inner wall of the pump casing body and swirls around the relay pipe, so that the fluid flow is good for the relay pipe penetrating the steam-water separation chamber. The thing of the structure used as the guide member made into a vertical vortex is known (for example, patent document 1).

JP 2001-90685 A

  However, in the configuration of the self-priming pump device described in JP-A-2001-90685, the flow of the fluid discharged from the discharge opening of the water guide wall to the steam-water separation chamber is caused by the rotation of the pump runner. Since it becomes a vertical vortex that slowly rises while turning in the pump casing body, there is a problem that the flow rate of the fluid hardly changes, and the steam-water separation is not performed efficiently.

  Furthermore, in the self-priming pump device described in the above-mentioned Japanese Patent Application Laid-Open No. 2001-90685, a relay pipe penetrating the air-water separation chamber serving as a guide member that makes the flow of fluid a good vertical vortex is provided with a suction port. A straight portion connected to the cylinder, an L-shaped pipe portion having a curved portion bent at a right angle from the lower end of the straight portion, and a backflow formed so as to surround an open portion of the curved portion of the L-shaped pipe portion The first pipe member comprising the prevention portion, the flat surface constituting the lower surface of the pump runner storage chamber, the L-shaped pipe portion formed by utilizing a small part of the flat surface, and the connecting portion with the first pipe member There is a problem that the manufacturability is poor because the second pipe member is made of a complicated structure.

  The present invention has been made in view of the above-mentioned background art, and a main object of the present invention is to provide a self-priming pump device excellent in manufacturability capable of efficiently performing air-water separation.

  Another object of the present invention is to enable air-water separation to be performed efficiently and to produce a direction-changing wall body that changes the flow direction of the fluid discharged from the discharge opening of the partition upward. It is providing a type | formula pump apparatus.

  Furthermore, another object of the present invention is to enable air / water separation to be performed efficiently, and the air contained in the fluid discharged from the discharge opening of the partition to the air / water separation chamber side is returned from the return water port to the pump runner storage chamber. An object of the present invention is to provide a self-priming pump device that can suppress the inflow into the pump.

The inside of the air / water separation chamber and the drive motor storage chamber are divided into right and left to discharge the fluid sucked into the suction cylinder and the cylinder for suction into the upper portion of the air / water separation chamber. A pump casing main body provided with a discharge port cylinder, a base cover for sealing a bottom opening of the pump casing main body, and a drive motor stored in the drive motor storage chamber. A pump runner storage chamber is formed between the pump casing main body and the base cover, which is positioned below and accommodates a pump runner connected to the rotation shaft of the drive motor. The pump runner storage chamber and the suction port The tubular body communicates via a suction water passage and a suction chamber, and the suction water passage extends through the air / water separation chamber toward the inner bottom of the base cover. Provided with a configuration including a cylindrical body, and provided with a backflow prevention valve for preventing a backflow of fluid from the suction chamber to the suction water passage side, and discharged from the pump runner storage chamber to the air / water separation chamber side A swirl prevention body is provided in the steam-water separation chamber for preventing fluid from swirling along the periphery of the elongated cylindrical body in the steam-water separation chamber, and the pump runner is rotated by a centrifugal force of the pump runner. A spiral water guide wall portion having a discharge opening for discharging fluid pushed outward from the pump runner storage chamber to the air / water separation chamber side and a bag-shaped portion storing the backflow prevention valve are integrated. In the self-priming pump device that forms the suction chamber by sandwiching the formed partition body between the outer bottom portion of the pump casing body and the rising outer peripheral wall portion,
A direction-changing wall that changes the flow direction of the fluid discharged from the discharge opening of the partition body upward, and a partition body that is integrally formed in front of the discharge opening are formed on the outer bottom and base of the pump casing body. The suction chamber is formed by being sandwiched between a rising outer peripheral wall formed integrally with a cover .

  Furthermore, in order to achieve another object of the present invention, a fluid guide wall surface that guides the fluid discharged from the discharge opening of the partition toward the gas-water separation chamber side is connected to the discharge opening of the partition. Are formed integrally with the outer peripheral wall of the partition body, and the direction changing wall body is integrally formed at the end portion of the fluid guide wall surface, and the direction changing wall body is discharged from the discharge opening of the partition body. After the fluid collides with the direction changing wall body, it is characterized in that it is plate-shaped so that the fluid rises substantially at a right angle.

  Furthermore, in order to achieve another object of the present invention, the fluid discharged from the pump runner storage chamber to the air / water separation chamber side is divided into a water guide wall portion of the pump runner storage chamber and an outer peripheral wall of the suction chamber. A circulation passage for circulating the outer periphery of the rising outer peripheral wall portion and returning it to the side of the steam / water separation chamber is formed between the rising outer peripheral wall portion and the water guide wall portion and the inner wall of the base cover, and A return water port is provided for returning the fluid circulating through the circulation passage into the pump runner storage chamber, and the positional relationship between the return water port and the direction changing wall body is approximately centered on the cylindrical shaft portion of the pump runner. It is characterized by being set to face each other.

  According to the present invention, the direction changing wall body that changes the flow direction of the fluid discharged from the discharge opening of the partitioning body to the upper side is provided in front of the discharge opening of the partitioning body. Since the fluid (priming water) discharged to the water separation chamber immediately collides with the direction changing wall during self-priming operation, the flow direction of the fluid can be changed from the horizontal direction to the vertical direction (upward direction). In addition, after the fluid flow direction is changed from the horizontal direction to the vertical direction (upward direction), the fluid discharged to the steam-water separation chamber may swirl around the swirl prevention body. Therefore, the air contained in the fluid discharged from the outlet opening of the pump partition to the side of the steam / water separation chamber moves smoothly upward in the pump casing body. Fluid discharged to the separation chamber side The air-water separation of the contained air is efficiently performed, and the fluid discharged from the discharge opening of the pump partition body to the air-water separation chamber side is hardly discharged from the discharge port cylinder of the pump casing body, The air contained in the fluid discharged to the air / water separation chamber side from the discharge opening of the partition body can be efficiently discharged from the discharge port cylinder of the pump casing body, and the self-priming pump has excellent air / water separation performance. A device is obtained.

  Further, according to another aspect of the present invention, a fluid guide wall surface that guides the fluid discharged from the discharge opening of the partition toward the air-water separation chamber side, and the outer peripheral wall of the partition that is continuous with the discharge opening of the partition Since the direction change wall body can be integrally formed at the time of molding the partition wall body by forming the direction change wall body integrally with the end portion of the guide wall. A suction pump device is obtained.

  Furthermore, according to another aspect of the present invention, the fluid discharged from the discharge opening of the partition to the side of the air / water separation chamber is disposed on the outer periphery of the rising outer peripheral wall portion which becomes the water guide wall portion of the pump runner storage chamber and the outer peripheral wall of the suction chamber. A circulation passage for circulating and returning to the steam / water separation chamber side is formed between the rising outer peripheral wall portion and the water guide wall portion and the inner wall of the base cover, and the fluid circulating in the circulation passage is supplied to the pump runner storage chamber. Even if the return water port for returning to the configuration is provided in the circulation passage, the positional relationship between the return water port and the direction changing wall body is set so as to be substantially opposed centering on the cylindrical shaft portion of the pump runner, Since the return water port is provided at the position farthest from both the steam-water separation chamber side and the discharge opening portion of the partition body, it is included in the fluid discharged from the partition opening to the steam-water separation chamber side. The air that has returned water Since can be prevented from being again returned to Pont planner housing chamber from self-priming pump device is obtained which can prevent a decrease in self-priming performance.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS.
FIG. 1 is a longitudinal sectional view of an essential part of a self-priming pump device according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of the entire self-priming pump device according to one embodiment of the present invention.
FIG. 3 is an external perspective view of the self-priming pump device according to one embodiment of the present invention.
FIG. 4 is a side view of the self-priming pump device according to one embodiment of the present invention.
5 is a cross-sectional view taken along the line AA in FIG.
FIG. 6 is an exploded perspective view of the partition body and the base cover in the self-priming pump device according to the embodiment of the present invention.
FIG. 7 is a front view of the base cover of the self-priming pump device according to the embodiment of the present invention.
FIG. 8 is a top view of the base cover of the self-priming pump device according to the embodiment of the present invention.
FIG. 9 is a bottom view of the base cover of the self-priming pump device according to the embodiment of the present invention.
FIG. 10 is a right side view of the base cover of the self-priming pump device according to the embodiment of the present invention.
FIG. 11 is a left side view of the base cover of the self-priming pump device according to the embodiment of the present invention.
FIG. 12 is a top view of the partition of the self-priming pump device according to the embodiment of the present invention.
13 is a cross-sectional view taken along the line BB in FIG.
FIG. 14 is a bottom view of the partition of the self-priming pump device according to the embodiment of the present invention.
FIG. 15 is a left side view of the partition body of the self-priming pump device according to the embodiment of the present invention.
FIG. 16 is a front reduced view of the self-priming pump device according to one embodiment of the present invention.
FIG. 17 is a reduced top view of the self-priming pump device according to one embodiment of the present invention.
FIG. 18 is a left side reduced view of the self-priming pump device according to one embodiment of the present invention.
FIG. 19 is a rear view of the self-priming pump device according to the embodiment of the present invention.
FIG. 20 is a bottom view of the self-priming pump device according to the embodiment of the present invention.
FIG. 21 is an enlarged top view of the backflow prevention valve of the self-priming pump device according to one embodiment of the present invention.
22 is a cross-sectional view taken along the line CC of FIG.
23 is a cross-sectional view taken along the line DD of FIG.
FIG. 24 is a cross-sectional view of the main part of the pump casing body in the self-priming pump device according to one embodiment of the present invention.
FIG. 25 is a longitudinal sectional view of a main part of a pump casing body in the self-priming pump device according to one embodiment of the present invention.

  The self-priming pump device 1 according to one embodiment of the present invention shown in FIGS. 1 to 25 is divided into a steam / water separation chamber 2A and a drive motor storage chamber 2B in the left and right, and the upper part of the steam / water separation chamber 2A. A pump casing body 2 provided with a suction port cylinder 2C for sucking fluid into the interior and a discharge port cylinder 2D for discharging fluid sucked into the interior; and a bottom opening of the pump casing body 2 2Q includes a base plate 3 having a deep dish shape and a drive motor 4 housed in the drive motor storage chamber 2B, and is located below the drive motor storage chamber 2B and is located on the outer bottom of the pump casing body 2 A pump runner storage chamber 6 in which a closed blade type pump runner 5 made of a synthetic resin connected to the rotating shaft 4A of the drive motor 4 is stored is formed between 2E and the inner bottom of the base cover 3. The pump runner storage chamber 6 and the suction port cylinder 2C communicate with each other through the suction water passage 7 and the suction chamber 8, and the suction water passage 7 passes through the air / water separation chamber 2A to the inner bottom of the base cover 3. A configuration including the elongated cylindrical body 9 extending in the direction and a configuration of providing a backflow prevention valve 10 for preventing the backflow of fluid from the suction chamber 8 toward the suction water passage 7 side.

  The suction port cylinder 2 </ b> C is provided on the upper surface of the pump casing body 2. The discharge port cylinder 2 </ b> D is provided on the upper side surface of the pump casing body 2. Further, the elongated cylindrical body 9 in the steam-water separation chamber 2A is shifted in a direction away from the drive motor storage chamber 2B side. That is, the elongated cylindrical body 9 is shifted in the direction away from the drive motor storage chamber 2 </ b> B side from the center in the longitudinal direction of the steam / water separation chamber 2. In the present embodiment, the elongated cylindrical body 9 is placed in the drive motor storage chamber so that the outer surface of the elongated cylindrical body 9 on the drive motor storage chamber 2B side substantially coincides with the center in the longitudinal direction of the steam / water separation chamber 2. It is shifted in a direction away from the 2B side (see FIGS. 24 and 25).

  The pump casing body 2 is made of synthetic resin, and has an outer shape of a vertically long and substantially box shape. As shown in FIG. 1, a support cylinder portion 2 </ b> F and a drive motor support rib 2 </ b> R are formed on the bottom portion of the drive motor storage chamber 2 </ b> B of the pump casing body 2 so as to protrude upward to support the drive motor 4. (See FIGS. 24 and 25). A rotation shaft insertion opening 2 </ b> S for inserting the rotation shaft 4 </ b> A of the drive motor 4 is provided at the center of the support cylinder portion 2 </ b> F. A drain hole 2G is provided on the side surface of the pump casing body 2 located outside the support cylinder portion 2F. The rotating shaft 4A of the drive motor 4 is protruded downward from the center of the supporting cylinder portion 2F, and the cylindrical shaft portion 5A of the pump runner 5 is press-fitted into the rotating shaft 4A so that the cylindrical shaft portion 5A of the pump runner 5 is Attached to the rotating shaft 4 </ b> A of the drive motor 4.

  As shown in FIG. 1, a disc-shaped seal member (oil seal) 11 is provided between the cylindrical shaft portion 5A of the pump runner 5 and the inner wall of the support cylinder portion 2F. The disc-shaped seal member 11 prevents fluid from entering the support tube portion 2F from the pump runner storage chamber 6 in which the pump runner 5 is stored. On the upper side surface of the pump casing main body 2, a priming port cylinder 2 </ b> H for injecting priming water into the air / water separation chamber 2 </ b> A, the pump runner storage chamber 6, and the suction chamber 8 is provided. A plurality of positioning ribs 2K that perform the positioning function of the disc-shaped seal member 11 are provided on the inner wall of the support cylinder portion 2F. The drain hole 2G is damaged by the seal member (oil seal) 11, so that in the unlikely event that the fluid enters the supporting cylinder portion 2F from the pump runner storage chamber 6, the fluid is supplied to the pump casing body 2. It is intended to flow outside. The pump casing body 2 includes a drive motor storage chamber 2B, a suction port cylinder 2C, and an upper cylinder for molding the elongated cylindrical body 9, an air / water separation chamber 2A, and a first closing body for a swirl prevention body 15 to be described later. A lower mold for forming 15A and the support cylinder portion 2F, a right side mold for forming the discharge port cylinder 2D and the priming port cylinder 2H, and a right side mold for forming the drain hole 2G Thus, it can be molded by die cutting.

  The upper end opening 2J of the drive motor storage chamber 2B of the pump casing body 2 is inserted and installed in the drive motor 4 from the upper end opening 2J into the drive motor storage chamber 2B, and then covered with a motor cap 12 made of synthetic resin. The motor cap 12 has a function of suppressing shakiness in the axial direction of the drive motor 4. The electrical connection body 13 of the drive motor 4 is protruded outward from the pump casing body 2 and the motor cap 12 through the drawing opening 12 </ b> A of the motor cap 12. The suction port cylinder 2C protrudes upward from the upper surface of the motor cap 12 attached to the pump casing body 2, thereby removing and attaching a flexible water suction hose (not shown) for pumping water. Easy to use. On the outer wall of the motor cap 12, there are provided two locking pieces 12B that are detachably fitted into two fitting holes 2P provided on the upper outer periphery of the pump casing body 2.

  The deep-plate-shaped base cover 3 is made of synthetic resin, and in the base cover 3, as shown in FIGS. 1 and 6, a suction water passage connection in which the lower end side of the elongated cylindrical body 9 is connected and fitted. 3 A of cylinders, horizontal plate part 3K provided adjacent to this suction water passage connection cylinder 3A, and a ring communicating with the suction water channel connection cylinder 3A provided on this horizontal plate part 3K -Shaped horizontal valve seat portion 3B, a backflow prevention valve mounting recess 3C for attaching a backflow prevention valve 10 provided on the horizontal plate portion 3K adjacent to the horizontal valve seat portion 3B, and a suction water passage A communication passage 3H from the connecting cylinder 3A to the horizontal valve seat portion 3B, a rising outer peripheral wall portion 3D serving as an outer peripheral wall of the suction chamber 8, and a second closing member 15B of the swirl prevention member 15 described later are formed. .

  As shown in FIGS. 6 and 8, the rising outer peripheral wall portion 3D includes a first partition wall 3D-1 provided between the horizontal valve seat portion 3B and the suction water passage connecting cylinder 3A, and the partition wall. From the second partition wall 3D-2 and the third partition wall 3D-3 that are provided on the left and right sides, and the fourth partition wall 3D-4 that is connected to the second partition wall 3D-2 and the third partition wall 3D-3. The first partition wall 3D-1, the second partition wall 3D-2, and the third partition wall 3D-3 are in a linear shape parallel to the inner wall of the base cover 3, and the fourth partition wall 3D-4 is It has a curved shape. The first partition wall 3D-1 is integrally formed on the horizontal flat plate portion 3K. The second partition wall 3D-2, the third partition wall 3D-3, and the fourth partition wall 3D-4 are integrally formed on the inner bottom of the base cover 3. Further, the water passage cross-sectional area of the elongated cylindrical body 9 is S1, the water passage cross-sectional area of the communication passage 3H is S2, the opening area of the horizontal valve seat 3B is S3, the opening area of the communication opening G is S4, and the inflow opening 14D. When the opening area is S5, the flow rate of the fluid passing through the suction water passage 7 and the suction chamber 8 is not reduced by setting S1 <S2 <S3 <S4 <S5. In the present embodiment, the water passage sectional area S2 of the communication passage 3H is set to be 1.04 times the water passage sectional area S1 of the elongated tubular body 9.

  The backflow prevention valve 10 is made of rubber and includes a disc-like valve body portion 10A and an attachment piece portion 10B formed integrally with the valve body portion 10A as shown in FIG. The backflow prevention valve 10 is held in the backflow prevention valve mounting recess 3C of the base cover 3 so that the flat surface 10E on the lower surface side of the valve body portion 10A is horizontal, and the valve body portion 10A can be opened and closed vertically. As a structure. The backflow prevention valve 10 is set to a weight that allows the valve body portion 10A to move upward when the pump runner 5 rotates, and away from the horizontal valve seat portion 3B, and when the pump runner 5 stops rotating. By the weight of the valve body portion 10A of the backflow prevention valve 10, the valve body portion 10A rotates downward and presses against the horizontal valve seat portion 3B, so that the fluid from the suction chamber 8 to the suction water passage 7 side is transferred. The reverse flow is prevented. The detailed structure of the backflow prevention valve 10 is shown in FIGS. A circular central recess 10C and a ring groove 10D are provided on the upper surface of the valve body 10A of the backflow prevention valve 10 to prevent sink marks when the backflow prevention valve 10 is molded.

  The partition body 14 is made of synthetic resin, and as shown in FIGS. 1 and 6, the fluid pushed out of the pump runner 5 by the rotational centrifugal force of the pump runner 5 is separated from the pump runner storage chamber 6 by air and water. A spiral water guide wall 14A having a discharge opening 14B for discharging to the chamber 2A side, a bag-like part 14C for storing the backflow prevention valve 10, and a central opening 5B of the pump runner 5 are provided. A substantially bellmouth-shaped inflow opening 14D and a rising outer peripheral wall portion 3D of the base cover 3 (first partition wall 3D-1, second partition wall 3D-2, third partition wall 3D-3, and fourth partition wall 3D- 4) A fitting groove (concave portion) 14E into which the upper end portion is fitted, and a presser portion 14F for holding the mounting piece portion 10B of the backflow prevention valve 10 from coming out of the backflow prevention valve mounting recess 3C are integrated. It has been made.

  In a state where the fitting groove 14E of the partition 14 is fitted into the rising outer peripheral wall 3D of the base cover 3, as shown in FIG. 1, the horizontal valve seat portion 3B of the base cover 3 and the inner wall of the partition 14 are separated. A communication opening G is formed between the communication passage 3H and the inflow opening 14D. In addition, at the outer edge of the fitting groove 14E of the partition body 14, the second partition wall 3D-2, the third partition wall 3D-3, and the fourth partition wall 3D-4 of the rising outer peripheral wall portion 3D of the base cover 3 are provided. And a skirt portion (hem portion) 14G for improving the watertightness between the partitioning body 14 and the fitting groove 14E of the partition body 14 are integrally provided. Further, the bag-like portion 14C of the partition 14 faces the suction water passage connecting cylinder 3A side of the side wall of the bag-like portion 14C, as shown in FIGS. A bulging portion 14H is formed by bulging the central portion of the side wall outward. This ensures a minimum necessary gap that allows the disc-like valve body portion 10A to move up and down without contacting the side wall of the bag-like portion 14C without enlarging the bag-like portion 14C of the partition body 14. it can.

  As shown in FIGS. 5 and 6, a direction changing wall body 14 </ b> J is provided in front of the discharge opening 14 </ b> B of the partition body 14 to change the flow direction of the fluid discharged from the discharge opening 14 </ b> B of the partition body 14 upward. Yes. In the present embodiment, the outer peripheral wall of the partition body 14 is connected to the fluid guide wall surface 14K that guides the fluid discharged from the discharge opening 14B of the partition body 14 toward the air-water separation chamber side. And the direction changing wall body 14J are integrally formed at the terminal portion of the fluid guide wall surface 14K. The direction changing wall body 14J has a plate shape so that after the fluid discharged from the discharge opening 14B of the partitioning body 14 collides with the direction changing wall body 14K, the fluid rises substantially at a right angle. Moreover, the area of the collision surface of the fluid discharged from the discharge opening 14B of the partition 14 in the direction changing wall 14K is set to be substantially the same as the outflow opening area of the discharge opening 14B of the partition 14.

  In the pump casing body 2 and the base cover 3, the fluid discharged from the discharge opening 14 </ b> B of the partition body 14 toward the air / water separation chamber 2 </ b> A is along the periphery of the elongated cylindrical body 9 constituting the suction water passage 7. A turning prevention body 15 is formed to prevent turning. As shown in FIG. 1, the rotation preventing body 15 includes a first closing body 15 </ b> A that closes a gap between the elongated cylindrical body 9 and the inner wall of the pump casing body 2, and a connecting cylinder for the suction water passage of the base cover 3. It consists of a second closing body 15B that closes the gap between 3A and the inner wall of the base cover 3. 15 A of 1st obstructions consist of the shielding board part formed by integrally connecting the elongate cylindrical body 9 and the inner wall of the pump casing main body 2, and make the elongate cylindrical body 9 close to the inner wall of the pump casing main body 2. By arranging them, the horizontal width of the shielding plate portion is reduced. As shown in FIG. 5 and FIG. 6, the second closing body 15 </ b> B is composed of a shielding plate portion integrally connecting the suction water passage connecting cylinder 3 </ b> A and the inner wall of the base cover 3. By arranging the water-passage connecting cylinder 3A close to the inner wall of the base cover 3, the lateral width of the shielding plate portion is reduced.

  In the present embodiment, the first closing body 15A is formed over the entire length of the gap between the elongated cylindrical body 9 and the inner wall of the pump casing body 2, and the second closing body 15B The gap is formed over the entire length of the gap between the passage connecting cylinder 3 </ b> A and the inner wall of the base cover 3. In the present embodiment, the discharge port cylinder 2D of the pump casing body 2 is provided on the upper side surface of the pump casing body 2 located outside the side surface of the first closing body 15A.

  Between the rising outer peripheral wall portion 3D and the water guide wall portion 14A and the inner side wall of the base cover 3, the fluid discharged from the pump runner storage chamber 6 to the steam / water separation chamber 2A side is shown by a one-dot chain line P1 in FIG. As described above, the circulation passage 16 for circulating the outer periphery of the water guide wall portion 14A of the pump runner storage chamber 6 and the outer periphery of the rising outer peripheral wall portion 3D that becomes the outer peripheral wall of the suction chamber 8 to return to the steam-water separation chamber 2A side is formed. ing. In the middle of the circulation passage 16 and at the lower end portion of the water guide wall portion 14A of the partition member 14, a substantially elongated elliptical return water port 17 for returning the fluid circulating through the circulation passage 16 into the pump runner storage chamber 6 is provided. Is formed. In the present embodiment, by setting the positional relationship between the return water port 17 and the direction changing wall body 14J to be substantially opposed to the center of the cylindrical shaft portion 5A of the pump runner 5 as shown in FIG. A return port 17 having a substantially elongated ellipse shape is formed at a position farthest from both the air / water separation chamber 2 </ b> A side and the discharge opening 14 </ b> B portion of the partition 14.

  The elongated cylindrical body 9 that penetrates through the air / water separation chamber 2A and extends substantially vertically toward the inner bottom of the base cover 3 has an upper end that is integrally connected to the suction port cylinder 2C, and a lower end that is the base cover. 3 is connected to 3A of connecting cylinders for suction water passages. On the inner periphery of the suction water passage connecting cylinder 3A of the base cover 3, a stepped portion 3E on which a ring-shaped elastic sealing member (packing) 18 can be placed is formed. The elongated cylindrical body 9 is formed by inserting the small diameter portion 9A at the lower end of the elongated cylindrical body 9 into the suction water passage connecting cylinder 3A, and then elastically deforming the end surface of the small diameter portion 9A of the elongated cylindrical body 9. By pressing the stepped portion 3E of the suction water passage connecting cylinder 3A via the sealing member 18, the suction water passage connection cylinder 3A of the base cover 3 is connected in a watertight manner.

  In the present embodiment, as shown in FIG. 1, the elongated cylindrical body 9 is sucked into the base cover 3 by sandwiching the partition body 14 between the outer bottom portion 2 </ b> E of the pump casing body 2 and the rising outer peripheral wall portion 3 </ b> D. The suction chamber 8 is formed by being connected to the water passage connecting cylinder 3A, and at the same time, the mounting piece 10B of the backflow prevention valve 10 is fixedly held in the backflow prevention valve mounting recess 3C. In this case, the attachment piece 10B of the backflow prevention valve 10 is the weight of the valve body portion 10A of the backflow prevention valve 10, and the flat surface 10E of the valve body portion 10A of the backflow prevention valve 10 is the horizontal valve seat of the base cover 3. It is attached to the backflow prevention valve mounting recess 3C of the base cover 3 so as to be pressed by the portion 3B. In the present embodiment, the passage from the suction port cylinder 2C through the elongated cylindrical body 9 and the communication passage 3H to the horizontal valve seat portion 3B is referred to as a suction water passage 7 and the horizontal valve seat portion. A passage from 3B to the inflow opening 14D of the partition 14 is referred to as a suction chamber 8.

  In this embodiment, the drive motor 4 is a small commutator motor whose outer shape is a small cylinder. The drive motor 4 is set so as to obtain a rotational speed of about 7000 r / min. The outermost diameter of the pump runner 10 is set to about 26 mm. The inner diameter of the elongated cylindrical body 9 is set to about 14 mm. The flow rate of the fluid discharged from the inflow opening 14D of the partition body 14 toward the steam-water separation chamber 2A is set to about 2 m / second.

  As shown in FIG. 2, a suction port cylinder 2 </ b> C, a discharge port cylinder 2 </ b> D, and a priming port cylinder 2 </ b> H are disposed in the upper portion of the pump casing body 2. The discharge port cylinder 2D and the priming port cylinder 2H of the pump casing body 2 are formed to extend in a horizontal direction (a direction perpendicular to the axial direction of the rotation shaft 4A of the drive motor 4). . A cylindrical hose attachment flange 2L is formed at the opening end of the suction port cylinder 2C formed on the upper surface of the pump casing body 2. A flexible water absorption hose (not shown) for pumping water is detachably attached to the suction port cylinder 2C of the pump casing body 2 using a hose attachment flange 2L. The free end side of this water absorption hose (not shown) is put into a bathtub (not shown). A filter (not shown) for removing fine dust contained in the bath water is detachably provided inside the suction port cylinder 2C of the pump casing body 2.

  The pump casing body 2 and the base cover 3 are provided with welding ribs 2N provided on the entire circumference of the end face of the mounting flange 2M of the pump casing body 2 in the welding grooves 3G provided on the entire circumference of the end face of the mounting flange 3F of the base cover 3. After the fitting, the welding rib 2N is heat-welded in the welding groove 3G by flowing electricity through a stainless steel wire (connection wire) 19 inserted in advance around the entire circumference of the welding groove 3G. Is done.

  On the inner bottom of the deep-plate-shaped base cover 3, a second blocking of the suction water passage connecting cylinder 3 </ b> A, the horizontal valve seat portion 3 </ b> B, the backflow prevention valve mounting recess 3 </ b> C, the rising outer peripheral wall portion 3 </ b> D and the swirl prevention body 15 In order to form the base cover 3 provided with the body 15B, an upper mold for molding the upper surface side of the base cover 3, a lower mold for molding the lower surface side of the base cover 3, and a connection for the suction water passage It is molded by a lateral mold for molding the communication passage 3H from the cylindrical body 3A to the horizontal valve seat portion 3B. The die opening 3J formed on the side surface of the base cover 3 is sealed in a watertight manner by a stopper elastic sealing member (O-ring) 21 and a stopper member (cap) 20. Moreover, the partition 14 is die-cut up and down by an upper mold for forming a surface on the side where the water guide wall 14A is provided and a lower mold for forming a surface on the side where the fitting groove 14E is provided. The discharge opening 14B, the fluid guide wall surface 14K, and the direction changing wall body 14J can be divided into the partition body 14 (water guide wall portion 14A and bag-like portion 14C) by punching up and down. The return water port 17 can be easily provided on the side surface portion of the water guide wall portion 14 </ b> A of the partition body 14.

  When the self-priming pump device 1 of the above embodiment is used, first, a suction hose (not shown) is attached to the suction port cylinder 2C of the pump casing body 2, and then the priming port cylinder 2H. To the air / water separation chamber 2A, the pump runner storage chamber 6, the suction chamber 8 and the elongated cylindrical body 9 to the water level L1 (the lower end height position of the discharge port cylinder 2D).

  Next, in a state where priming water is injected into the self-priming pump device 1, the drive motor 4 is rotated, and the pump runner 5 provided on the rotation shaft 4 </ b> A of the drive motor 4 is rotated at a high speed. As a result, the center of the pump runner 5 becomes a negative pressure. When the center of the pump runner 5 becomes negative pressure, the negative pressure is pulled, the backflow prevention valve 10 is opened, and the air in the water absorption hose (not shown) attached to the suction port cylinder 2C is The air is sucked into the pump runner 5 and mixed with priming water and air, and passes through the pump runner storage chamber 6 at high speed. The priming water containing air is discharged from the discharge opening 14B of the partition body 14 at high speed.

  The priming water containing the air discharged from the discharge opening 14B of the partition body 14 is guided by the fluid guide wall surface 14K and collides with the direction changing wall body 14J, the flow rate of the priming water is weakened, and the priming water flow direction is horizontal. In order to change from the direction to the vertical direction, air having a low specific gravity contained in the priming water moves toward the upper side of the steam-water separation chamber 2A, and after colliding with the direction changing wall body 14J, the steam-water separation chamber 2A. The priming water led to the air-water separation chamber 2A does not swirl around the elongated cylindrical body 9 as a vertical vortex by the first closing body 15A and the second closing body 15B constituting the turning prevention body 15. Since air and water are separated by being led to a large room portion, the air contained in the priming water is efficiently exhausted to the outside (atmosphere) from the discharge port cylinder 2D of the pump casing body 2, and the priming water is pump casing. It is inhibited from flowing to the outside (atmosphere) from the discharge port accommodating cylinder 2D grayed body 2.

  On the other hand, the priming water whose velocity is weakened by colliding with the direction changing wall body 14J is guided to the steam / water separation chamber 2A, and then rises between the outer peripheral wall portion 3D and the water guide wall portion 14A and the inner wall of the base cover 3. It is led to the circulation passage 16 formed in the circulation passage 16 and returned to the pump runner storage chamber 6 from the return water port 17 provided in the circulation passage 16, and mixed with the air sucked from the suction port cylinder 2C and again partitioned at high speed. It is discharged from the discharge opening 14B of the body 14 toward the direction changing wall body 14J. By repeating this operation, the air in the water absorption hose attached to the suction port cylinder 2C is completely discharged, and the self-priming operation is completed. When the self-priming operation is completed, the fluid pumped up from the suction port cylinder 2C of the pump casing body 2 passes through the suction water passage 7 and the suction chamber 8 to the water guide wall 14A constituting the pump runner storage chamber 6. The water supply operation is performed by flowing into the air / water separation chamber 2A from the discharge opening 14B and being discharged from the discharge port cylinder 2D.

  When the drive motor 4 is stopped after the water supply operation is executed for a desired time, the negative pressure at the center of the pump runner 5 disappears, and the valve body portion 10A of the backflow prevention valve 10 is moved to the horizontal valve seat portion 3B by weight (self-weight). The backflow prevention valve 10 is closed by being pressed. As a result, the backflow of the fluid from the suction chamber 8 to the suction water passage 7 side is reliably prevented, and the state in which the fluid remains in the steam / water separation chamber 2A and the pump runner storage chamber 6 is maintained, so that In preparation for the suction operation, a series of self-priming operation and water supply operation are completed.

  Next, the assembly procedure of the self-priming pump device 1 of the above embodiment will be described in detail.

  First, after the seal member 11 is mounted on the support cylinder portion 2F of the pump casing body 2, the drive motor 4 is inserted into the drive motor storage chamber 2B of the pump casing body 2, and the rotation shaft 4A of the drive motor 4 is rotated. By inserting it into the shaft insertion opening 2S, the shaft portion of the pump runner 5 is press-fitted and fixed to the protruding rotating shaft 4A, and then the motor cap 12 is attached to the pump casing main body 2. By attaching to the upper surface portion of the pump casing main body 2 located above the drive motor storage chamber 2B, a set on the pump casing main body 2 side (hereinafter referred to as pump casing set) is completed.

  Next, the mold release opening 3J is previously sealed in the backflow prevention valve 10 in the base cover 3 which is sealed by attaching the plug member 20 by welding or the like via a plug elastic sealing member (packing) 21. The prevention valve 10 and the elastic sealing member (packing) 18 are attached. In other words, the elastic sealing member (packing) 18 is inserted into the suction cylinder for the suction water passage 3 </ b> A of the base cover 3, and the backflow prevention valve 10 mounting piece is inserted into the backflow prevention valve mounting recess 3 </ b> C of the base cover 3. Insert 10B

  Next, the fitting groove 14E formed on the lower surface of the partition body 14 is fitted to the upper end of the rising outer peripheral wall portion 3D so that the partition body 14 is mounted on the rising outer peripheral wall portion 3D of the base cover 3, thereby preventing backflow. The attachment piece 10B of the check valve 10 is sandwiched between the holding part 14F of the partition 14 and the horizontal flat plate part 3K provided with the attachment recess 3C for the check valve. Is fixedly held in the mounting recess 3C for the backflow prevention valve, and then the stainless steel wire 19 is inserted into the entire circumference of the welding groove 3G of the base cover 3, so that the base cover 3 side assembly (hereinafter referred to as the base cover assembly) Is completed).

  Next, the small diameter portion 9A of the elongated cylindrical body 9 in the pump casing main body 2 is fitted into the suction water passage connecting cylinder 3A of the base cover 3, and the welding rib 2N of the pump casing main body 2 is attached to the base cover. 3, the pump casing part set is incorporated into the base cover part set.

  Finally, the mounting flange 2M of the pump casing main body 2 and the mounting flange of the base cover 3 are welded by energizing the stainless wire 19 inserted in the welding groove 3G of the base cover 3, so that the pump casing portion The assembly and the base cover assembly are integrated in a watertight manner, and the assembly work of the self-priming pump device 1 is completed.

  According to the assembly procedure of the self-priming pump device 1 of the above embodiment, the assembly work of all parts can be performed smoothly and without difficulty in the flow work, and the manufacturability of the self-priming pump device 1 can be improved. it can.

Furthermore, according to the self-priming pump device 1 of the above embodiment, the air mixed in the priming water discharged from the discharge opening 14B of the partition body 14 is smoothly separated to discharge the cylinder 2D for the discharge port of the pump casing body 2. In addition, the priming water in the pump casing body 2 can be efficiently discharged from the priming port cylinder 2H, and the priming water in the pump casing main body 2 is discharged out of the pump casing main body 2 from the discharge port cylinder 2D and the priming port cylinder 2H. Can be suppressed, and self-priming performance can be improved. In addition, according to the self-priming pump device 1 of the above-described embodiment, a bellows type having a length of 4 m, one end of which is attached to the suction port cylinder 2C of the pump casing body 2 and the other end is put into the bathtub. It was confirmed that the self-priming time can be shortened by about 10 seconds compared with the conventional case when water is absorbed under the condition of a suction height of 1.2 m using the water absorption hose.

  Further, according to the self-priming pump device 1 of the above embodiment, the discharge port cylinder 2D is provided at a position provided in the priming port cylinder 2H, and the priming port cylinder 2H is used for the discharge port. Even if it is provided at a position provided in the cylinder body 2D, the air mixed with the priming water discharged from the discharge opening 14B of the partition body 14 is supplied to the discharge port cylinder 2D and the priming port cylinder of the pump casing body 2. It can be efficiently discharged from the body 2H, and the priming water in the pump casing body 2 is prevented from being discharged out of the pump casing body 2 from the discharge port cylinder 2D and the priming port cylinder 2H to decrease. be able to. Accordingly, the positions of the discharge port cylinder 2D and the priming port cylinder 2H can be changed in accordance with washing machines having different mounting conditions on the top cover and the like, and thus the degree of freedom in design of the self-priming pump device 1 Can be improved.

  Furthermore, according to the self-priming pump device 1 of the above-described embodiment, the return water port 17 and the discharge opening 14B can be easily made at the lower end portion of the water guide wall portion 14A of the partition body 14 by upper and lower die cutting. Therefore, the productivity is good. In addition, the partition body 14 is configured such that the valve body portion 10A of the flow prevention valve 10 is disposed horizontally, thereby increasing the height of the bag-like portion 14C for housing the backflow prevention valve 10 to the height of the water guide wall portion 14A. Since the suction chamber 8 is formed by rising the fitting groove 14E into the outer peripheral wall portion 3D, the size can be reduced.

  Furthermore, according to the self-priming pump device 1 of the above-described embodiment, the first blocking body 15A that blocks the rotation blocking body 15 between the outer wall of the elongated cylindrical body 9 and the inner wall of the pump casing body 2; Since the second cover 15B that closes the gap between the outer wall of the connecting cylinder 3A for the suction water passage of the base cover 3 and the inner wall of the base cover 3 is formed, the first block 15A is formed on the pump casing body 2. Since it can be made integrally at the time of molding and the second closing body 15B can be made integrally at the time of forming the base cover 3, it is possible to improve manufacturability.

Furthermore, according to the self-priming pump device 1 of the above-described embodiment, the return water port 17 and the direction changing wall body 14J are in a positional relationship so as to be substantially opposed to each other about the center of the cylindrical shaft portion 5A of the pump runner 5. By setting, the return water port 17 is provided at the position farthest from both the steam / water separation chamber 2 </ b> A side and the discharge opening 14 </ b> B portion of the partition body 14, so the steam / water separation is performed from the discharge opening 14 </ b> B of the partition body 14. It is possible to prevent the air contained in the fluid discharged to the chamber 2 </ b> A from returning from the return water port 17 into the pump runner storage chamber 6. That is, the return water port 17
Is provided at a position away from the air / water separation chamber 2A side, so that the air contained in the fluid discharged to the air / water separation chamber 2A side from the discharge opening 14B of the partition 14 is stored in the pump runner from the return water port 17. The fluid discharged into the chamber 6 is suppressed, and the return water port 17 is provided at a position away from the discharge opening 14B of the partition body 14, so that the fluid discharged from the discharge opening 14B of the partition body 14 to the steam-water separation chamber 2A side. The air contained therein is prevented from returning from the return water port 17 into the pump runner storage chamber 6. Further, since the circulation passage 16 can be formed along the inner bottom of the base cover 3, and the height position of the discharge opening 14B of the water guide wall portion 14A can be set in the base cover 3, Since the distance from the discharge opening 14B of the water guide wall portion 14A to the discharge port cylinder 2D of the pump casing body 2 can be set large, air-water separation is performed efficiently.

  Furthermore, according to the self-priming pump device 1 of the above-described embodiment, the elongated cylindrical body 9 that allows the pump runner storage chamber 6 and the suction port cylinder 2C to communicate with each other passes through the air-water separation chamber 2A and the base cover. 3 Since the suction chamber 8 formed in the inner bottom is communicated, the pump casing main body 2 and the base cover 3 can be combined into a small size.

  Furthermore, according to the self-priming pump device 1 of the above embodiment, since the upper surface of the horizontal valve seat portion 3B of the base cover 3 and the lower surface of the valve body portion 10A of the backflow prevention valve 10 are both horizontal, the horizontal valve seat portion Since the valve body portion 10A of the backflow prevention valve 10 is pressed substantially uniformly and strongly on the entire 3B, the backflow of water from the suction chamber 8 to the suction port cylinder 2C side is surely prevented. be able to. Further, since the elongated cylindrical body 9 in the steam-water separation chamber 2A is shifted in the direction away from the drive motor storage chamber 2B, the horizontal direction for disposing the valve body portion 10A of the check valve 10 horizontally. Can be secured without increasing the external dimensions of the pump casing body 2.

  Furthermore, according to the self-priming pump device 1 of the above-described embodiment, the backflow prevention valve 10 includes the disc-like valve body portion 10A and the attachment piece portion 10B formed integrally with the valve body portion 10A. In addition, the weight of the valve body portion 10A is set to a weight that allows the valve body portion 10A to move away from the horizontal valve seat portion 3B when the pump runner rotates, and the pump runner's When the rotation is stopped, the valve body portion 10A is rotated downward by the weight of the valve body portion 10A so as to be pressed against the horizontal valve seat portion 3B, so that the fluid from the suction chamber 8 to the suction water passage 7 side is provided. Can be reliably prevented.

  Furthermore, according to the self-priming pump device 1 of the above-described embodiment, the partition body 14 formed with the water guide wall portion 14A having the discharge opening 14B and the bag-like portion 14C for housing the backflow prevention valve 10 is provided with the pump casing body 2. By sandwiching between the outer bottom portion 2E and the rising outer peripheral wall portion 3D, the suction chamber 8 is formed, and at the same time, the mounting piece portion 10B of the backflow prevention valve 10 is fixedly held in the backflow prevention valve mounting recess 3C. Since the lower end side of the elongated cylindrical body 9 is connected and fitted to the suction water passage connecting cylinder 3A, the pump casing body 2, the partition body 14, and the base cover 3 can be assembled smoothly.

  Furthermore, in the self-priming pump device 1 of the above embodiment, when the rotation of the pump runner 5 is stopped after self-priming by the backflow prevention valve 10, the water in the suction chamber 8 flows back to the water inlet 2C side. Since the suction chamber 8 and the pump runner storage chamber 6 are filled with water, when the pump runner 5 is rotated again, for example, bath water (washing water) is supplied from the bathtub (bath) to the washing tub. In the washing operation, after the washing process is completed, when the process proceeds to the rinsing process via the water supply process, the self-priming operation time is not required. The bath water (washing water) can be supplied, and the washing work time can be shortened.

  Furthermore, according to the self-priming pump device 1 of the above embodiment, the pump runner 5 is stopped from rotating from the priming port cylinder 2H into the steam / water separation chamber, the pump runner storage chamber 6 and the suction chamber 8. Even when the inflowing tap water is used to flow out from the outlet cylinder 2D to the washing tub (not shown) through the supply pipe (not shown), the backflow prevention valve 10 is surely The tap water does not overflow from the pump chamber body 2 through the suction water passage 7 from the suction chamber 8 side.

  Although the self-priming pump apparatus 1 of the said embodiment is set as the structure which provides the cylinder 2H for priming ports in the pump casing main body 2, this invention is not limited to this. The present invention can be adopted even with a pump device having a pump casing body that does not include the priming port cylinder 2H. In the above embodiment, the priming water is tap water, and the water to be supplied is bath water, but is not limited to this, and when other fluids are self-priming and water supplying, The present invention can be applied.

It is a principal part longitudinal cross-sectional view of the self-priming pump apparatus concerning one Embodiment of this invention. It is an exploded perspective view of the whole self-priming pump device concerning one embodiment of the present invention. 1 is an external perspective view of a self-priming pump device according to an embodiment of the present invention. 1 is a right side view of a self-priming pump device according to an embodiment of the present invention. FIG. 5 is a cross-sectional view taken along the line AA in FIG. 4. It is the perspective view which looked at the state which decomposed | disassembled the partition body and base cover in the self-priming pump apparatus concerning one Embodiment of this invention from the upper direction. It is a front view of the base cover in the self-priming pump device concerning one embodiment of the present invention. It is a top view of the base cover in the self-priming pump device concerning one embodiment of the present invention. It is a bottom view of the base cover in the self-priming pump device concerning one embodiment of the present invention. It is a right view of the base cover in the self-priming pump apparatus concerning one Embodiment of this invention. It is a left view of the base cover in the self-priming pump device concerning one embodiment of the present invention. It is a top view of the partition in the self-priming pump device concerning one embodiment of the present invention. It is BB sectional drawing of FIG. It is a bottom view of the partition body in the self-priming pump device concerning one embodiment of the present invention. It is a left view of the partition body in the self-priming pump apparatus concerning one Embodiment of this invention. It is a front reduced view of the self-priming pump device concerning one embodiment of the present invention. It is an upper surface reduction view of the self-priming pump device concerning one embodiment of the present invention. It is a left side reduced view of the self-priming pump device concerning one embodiment of the present invention. It is a back surface reduced view of the self-priming pump apparatus concerning one Embodiment of this invention. It is a lower surface reduction view of the self-priming pump device concerning one embodiment of the present invention. It is an upper surface enlarged view of the backflow prevention valve in the self-priming pump apparatus concerning one Embodiment of this invention. It is CC sectional drawing of FIG. It is DD sectional drawing of FIG. It is a principal part cross-sectional view of the pump casing main body in the self-priming pump apparatus concerning one Embodiment of this invention. It is a principal part longitudinal cross-sectional view of the pump casing main body in the self-priming pump apparatus concerning one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Self-priming pump apparatus 2 Pump casing main body 2A Air-water separation chamber 2B Drive motor storage chamber 2C Suction cylinder 2D Discharge cylinder 2H Cylinder 3 Base cover 3A Suction water passage coupling cylinder 3B Horizontal valve seat portion 3C Backflow prevention valve mounting recess 3D Standing outer peripheral wall portion 3H Communication passage 3K Horizontal flat plate portion 4 Drive motor 4A Rotating shaft 5 Pump runner 5A Cylindrical shaft portion 6 Pump runner storage chamber 7 Suction water passage 8 Suction chamber DESCRIPTION OF SYMBOLS 9 Elongated cylindrical body 10 Backflow prevention valve 14 Partition body 14A Water guide wall part 14B Discharge opening 14C Bag-like part 14D Inflow opening 14J Direction change wall body 14K Fluid guide wall surface 15 Swing prevention body 16 Circulation path 17 Return water port

Claims (1)

The inside of the air / water separation chamber and the drive motor storage chamber are divided into right and left to discharge the fluid sucked into the suction cylinder and the cylinder for suction into the upper portion of the air / water separation chamber. A pump casing main body provided with a discharge port cylinder, a base cover for sealing a bottom opening of the pump casing main body, and a drive motor stored in the drive motor storage chamber. A pump runner storage chamber is formed between the pump casing main body and the base cover, which is positioned below and accommodates a pump runner connected to the rotation shaft of the drive motor. The pump runner storage chamber and the suction port The tubular body communicates via a suction water passage and a suction chamber, and the suction water passage extends through the air / water separation chamber toward the inner bottom of the base cover. Provided with a configuration including a cylindrical body, and provided with a backflow prevention valve for preventing a backflow of fluid from the suction chamber to the suction water passage side, and discharged from the pump runner storage chamber to the air / water separation chamber side A swirl prevention body is provided in the steam-water separation chamber for preventing fluid from swirling along the periphery of the elongated cylindrical body in the steam-water separation chamber, and the pump runner is rotated by a centrifugal force of the pump runner. A spiral water guide wall portion having a discharge opening for discharging fluid pushed outward from the pump runner storage chamber to the air / water separation chamber side and a bag-shaped portion storing the backflow prevention valve are integrated. In the self-priming pump device that forms the suction chamber by sandwiching the formed partition body between the outer bottom portion of the pump casing body and the rising outer peripheral wall portion,
A direction-changing wall that changes the flow direction of the fluid discharged from the discharge opening of the partition body upward, and a partition body that is integrally formed in front of the discharge opening are formed into an outer bottom portion and a base of the pump casing body. A vertical self-priming pump device characterized in that the suction chamber is formed by being sandwiched between a rising outer peripheral wall formed integrally with a cover .