US20030165380A1 - Self-priming pump - Google Patents

Self-priming pump Download PDF

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Publication number
US20030165380A1
US20030165380A1 US10/332,204 US33220403A US2003165380A1 US 20030165380 A1 US20030165380 A1 US 20030165380A1 US 33220403 A US33220403 A US 33220403A US 2003165380 A1 US2003165380 A1 US 2003165380A1
Authority
US
United States
Prior art keywords
self
main line
swirl flow
casing
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/332,204
Other languages
English (en)
Inventor
Yoshiaki Kanbara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HONDA KIKO CO Ltd
Original Assignee
HONDA KIKO CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HONDA KIKO CO Ltd filed Critical HONDA KIKO CO Ltd
Assigned to HONDA KIKO CO., LTD. reassignment HONDA KIKO CO., LTD. SEE RECORDING AT REEL 014449 FRAME 0859 (DOCUMENT RECORDED OVER TO CORRECT RECORDATION DATE FROM 07/30/2003 TO 08/04/2003) Assignors: KANBARA, YOSHIAKI
Assigned to HONDA KIKO CO., LTD. reassignment HONDA KIKO CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KANBARA, YOSHIAKI
Publication of US20030165380A1 publication Critical patent/US20030165380A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/004—Priming of not self-priming pumps
    • F04D9/006—Priming of not self-priming pumps by venting gas or using gas valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/004—Priming of not self-priming pumps
    • F04D9/005—Priming of not self-priming pumps by adducting or recycling liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/02—Self-priming pumps

Definitions

  • the present invention relates to a self-priming pump used for pumping.
  • the former self-priming pump comprises a large scroll casing and a small scroll casing formed around an impeller, a main line extending from the large scroll casing, an auxiliary line extending from the small scroll casing, and a casing in which an upper end of the auxiliary line is spirally brought into communication with the main line along a wall surface of the main line from a tangent direction thereof.
  • the main line is formed with a swirl flow forming space in which self-primed water accumulated in the casing is discharged into the main line from the small scroll casing through the auxiliary line together with air during self-priming operation, thereby generating a swirl flow in the main line to carry out air-water separation.
  • a mushroom-like lump is provided in the main line below the swirl flow forming space as means for eliminating the swirl flow.
  • a bag-like liquid stagnation casing is provided in an intermediate portion of a trap which is in communication with a suction opening of the casing.
  • the trap since the trap has the straight pipe-like shape, siphonage is prone to be generated, water (liquid) flows backward from the casing into the suction pipe by the siphonage, and the self-primed liquid can not be accumulated. To prevent this, it is necessary to largely set a vertical level difference such that a trap inlet port is set higher than a trap outlet port. As a result, a pumping load is increased, the self-priming time is increased, and the pumping ability must be enhanced.
  • the present invention has been accomplished to solve the above conventional problems, and it is a first object to provide a self-priming pump capable of preventing a swirl flow from developing during the self-priming operation and assuring the smooth flow of a stream of water during the pumping operation.
  • the present invention provides a self-priming pump comprising a casing in which a large scroll casing and a small scroll casing are formed around an impeller, a main line extends from the large scroll casing, and a spout is formed on an upper end of the main line, an auxiliary line extends from the small scroll casing, and an upper end of the auxiliary line is spirally brought into communication with the main line along a wall surface of the main line from a tangent direction thereof, a swirl flow forming space being formed in the main line, and in the swirl flow forming space, self-primed water accumulated in the casing being discharged into the main line together with air from the small scroll casing through the auxiliary line during self-priming operation, thereby generating swirl flow in the main line, and air-water separation being carried out, wherein
  • a plate member for eliminating the swirl flow extends in an extension direction of the main line in the main line below the swirl flow forming space.
  • This self-priming pump is characterized in that the swirl flow forming space is provided below the plate member as means for eliminating the swirl flow during the self-priming operation.
  • the plate member is provided below the swirl flow forming space, when the swirl flow generated in the swirl flow forming space tries to extend downward, the swirl flow can be obstructed by a surface of the plate member, and it is possible to eliminate the swirl flow which tries to extend downward.
  • the plate member since the plate member extends in the extension direction of the main line, the plate member does not hinder the water flow during the pumping operation. Only a cross-sectional area corresponding to a plate thickness of the plate member is varied between a portion where the plate member is provided and a portion where the plate member is terminated (swirl flow forming space) and therefore, water flow is not disturbed, and pumping performance does not become unstable.
  • the present invention (claim 2) provide a self-priming pump wherein a water tank for self-primed water is provided between the suction opening and a suction pipe, the water tank comprises a reserving portion swelling in the lateral direction and having a cross-sectional area greater than an opening area of the suction opening, a water outlet which laterally opens into a bottom end of the reserving portion and which is in communication with the suction opening substantially horizontally, and a water inlet which laterally opens into an upper end of the reserving portion and which is in communication with the suction pipe, and a lower end level of the water inlet is formed higher than an upper end level of the water outlet.
  • the entire length of the pump need not be increased unlike the conventional straight pipe like pump, and it is unnecessary to largely set a vertical level difference between the inflow port and the outflow port. Therefore, the suction side structure can be made compact, and a pumping load can be reduced. Thus, it is possible to reduce the self-priming time without increasing the pump ability.
  • FIG. 1 is an axial sectional view showing an essential portion of a self-priming pump according to a first embodiment of the present invention.
  • FIG. 2 is a sectional side view showing a casing of the self-priming pump.
  • FIG. 3 is a sectional view taken along a line A-A in FIG. 2.
  • FIG. 4 is a sectional view taken along a line B-B in FIG. 1.
  • FIG. 1 is an axial sectional view showing an essential portion of a self-priming pump according to a first embodiment of the present invention
  • FIG. 2 is a sectional side view showing a casing of the self-priming pump
  • FIG. 3 is a sectional view taken along a line A-A in FIG. 2
  • FIG. 4 is a sectional view taken along a line B-B in FIG. 1.
  • a reference number 1 represents a casing, and an impeller 2 is accommodated in the casing 1 .
  • a large scroll casing 10 and a small scroll casing 11 are formed around the impeller 2 .
  • a main line 12 extends from the large scroll casing 10 , and a spout 13 is formed on an upper end of the main line 12 .
  • An auxiliary line 14 extends from the small scroll casing 11 , and an upper end of the auxiliary line 14 is spirally brought into communication with the main line 12 along a wall surface of the main line 12 from a tangent direction thereof.
  • a swirl flow forming space 15 is formed in the main line 12 .
  • self-primed water accumulated in the casing 1 is discharged into the main line 12 together with air from the small scroll casing 11 through the auxiliary line 14 during self-priming operation, thereby generating swirl flow in the main line 12 , and air-water separation is carried out.
  • a plate member 16 extends in an extension direction of the main line 12 below the swirl flow forming space 15 .
  • a suction opening 17 is formed on a central portion of one side of the casing 1 .
  • a water tank 4 for self-primed water is provided between the suction opening 17 and a suction pipe 3 .
  • the water tank 4 comprises a reserving portion 40 swelling in the lateral direction and having a cross-sectional area greater than an opening area of the suction opening 17 , a water outlet 41 which laterally opens into a bottom end of the reserving portion 40 and which is in communication with the suction opening 17 substantially horizontally, and a water inlet 42 which laterally opens into an upper end of the reserving portion 40 and which is in communication with the suction pipe 3 .
  • a lower end level L 1 of the water inlet 42 is formed higher than an upper end level L 2 of the water outlet 41 so that water is accumulated up to the lower end level L 1 of the water inlet 42 so that the casing 1 is filled with self-primed water.
  • An impeller shaft 20 is supported at a central portion of the other side of the casing 1 , and the impeller shaft 20 is connected to a driving motor (not shown).
  • circulation flow is generated in such a manner that self-primed liquid interflows into the main line 12 from the small scroll casing 11 through the auxiliary line 14 during the self-priming operation, the self-primed liquid returns into the large scroll casing 10 from the main line 12 and again flows into the auxiliary line 14 from the small scroll casing 11 .
  • swirl flow is generated in the swirl flow forming space 15 , and air-water separation is carried out by centrifugal separation caused by this swirl flow.
  • the plate member 16 extends in the extension direction of the main line 12 , the plate member 16 does not hinder the water flow during the pumping operation. Only a cross-sectional area corresponding to a plate thickness of the plate member 16 is varied between a portion where the plate member 16 is provided and a portion where the plate member 16 is terminated (swirl flow forming space 15 ) and therefore, water flow is not disturbed, and pumping performance does not become unstable.
  • the reserving portion 40 of the water tank 4 is allowed to swell in the lateral direction. Necessary self-primed liquid can be accumulated only by this reserving portion 40 and thus, it is possible to reliably accumulate the self-primed liquid in the casing 1 when the pump is stopped.
  • the water tank 4 and the casing 1 may be integrally molded with each other.
  • the self-priming pump of the present invention (claim 1) has an effect that it is possible to prevent a swirl flow from developing during the self-priming operation and to assure the smooth flow of a stream of water during the pumping operation.
  • the self-priming pump of the invention (claim 2) has an effect that it is possible to make the suction side structure compact, to reduce a pumping load and reducing the self-priming time without increasing the pumping ability, and to reliably accumulate self-primed liquid in a casing when the pump is stopped.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US10/332,204 2000-07-06 2001-07-05 Self-priming pump Abandoned US20030165380A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000-205365 2000-07-06
JP2000205365A JP2002021761A (ja) 2000-07-06 2000-07-06 自吸式ポンプ

Publications (1)

Publication Number Publication Date
US20030165380A1 true US20030165380A1 (en) 2003-09-04

Family

ID=18702466

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/332,204 Abandoned US20030165380A1 (en) 2000-07-06 2001-07-05 Self-priming pump

Country Status (3)

Country Link
US (1) US20030165380A1 (fr)
JP (1) JP2002021761A (fr)
WO (1) WO2002004815A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110030822A1 (en) * 2009-08-07 2011-02-10 Bear Patrick A Dry Run Porting System

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4562088B2 (ja) * 2005-08-15 2010-10-13 株式会社電業社機械製作所 自吸式ポンプ
JP4819620B2 (ja) * 2006-08-30 2011-11-24 西垣ポンプ製造株式会社 自吸式ポンプ
JP4819621B2 (ja) * 2006-08-30 2011-11-24 西垣ポンプ製造株式会社 非容積形ポンプ
JP5318501B2 (ja) * 2008-08-29 2013-10-16 株式会社荏原製作所 自吸ポンプおよびケーシング組立体の形成方法
KR101414985B1 (ko) 2013-10-14 2014-07-04 (주)옥원산업 염색기의 메인펌프
CN108223387B (zh) * 2018-01-23 2020-09-04 宁波沃力科技有限公司 一种低噪音旋涡泵

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125030A (en) * 1964-03-17 Selfpriming centrifugal pump
US3163120A (en) * 1962-05-18 1964-12-29 Cascade Mfg Company Self-priming axial-flow pump

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB836945A (en) * 1957-12-16 1960-06-09 Worthington Corp Self-priming centrifugal pump
JPH051678Y2 (fr) * 1986-10-28 1993-01-18
JPS6480795A (en) * 1987-09-21 1989-03-27 Ogihara Seisakusho Kk Self-priming pump
JPH0626487A (ja) * 1992-07-07 1994-02-01 Terada Pump Seisakusho:Kk 自吸式うず巻ポンプ
JP2630725B2 (ja) * 1993-03-30 1997-07-16 伸五 横田 自吸式遠心ポンプ装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125030A (en) * 1964-03-17 Selfpriming centrifugal pump
US3163120A (en) * 1962-05-18 1964-12-29 Cascade Mfg Company Self-priming axial-flow pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110030822A1 (en) * 2009-08-07 2011-02-10 Bear Patrick A Dry Run Porting System
US9091261B2 (en) * 2009-08-07 2015-07-28 Pentair Flow Technologies, Llc Dry run porting system

Also Published As

Publication number Publication date
WO2002004815A1 (fr) 2002-01-17
JP2002021761A (ja) 2002-01-23

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Date Code Title Description
AS Assignment

Owner name: HONDA KIKO CO., LTD., JAPAN

Free format text: ;ASSIGNOR:KANBARA, YOSHIAKI;REEL/FRAME:014349/0341

Effective date: 20030314

AS Assignment

Owner name: HONDA KIKO CO., LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KANBARA, YOSHIAKI;REEL/FRAME:014449/0859

Effective date: 20030314

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION