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1. 发明专利

DE69527949D1 未知
公开(公告)号：DE69527949D1
公开(公告)日：2002-10-02
申请号：DE69527949
申请日：1995-01-27
申请人： YOKOTA SEISAKUSHO HIROSHIMA KK , YOKOTA HIROSHI , YOKOTA SHINGO
发明人： YOKOTA HIROSHI , YOKOTA SHINGO
IPC分类号： E03C1/10 , F16K1/20 , F16K15/03 , F16K15/18 , F16K47/00 , F16K47/02 , F16L55/055
摘要： The invention has its object to radically resolve an untapped technical issue in a non-water hammering check valve device, in which a valve disc, a valve seat and a surrounding flow passage are configured such that the valve disc is substantially seated on the valve seat at the time when input to a pump is shut off and a discharge flow in the flow passage loses inertia to stop, and to provide a reasonable non-water hammering check valve device of a simple and clear construction which suffers a small resistance loss of a valve at the time of a predetermined maximum flow rate, can readily accommodate an abrupt change in a flow state without delay in valve closing operation and provides a uniform and close seating on the valve seat at the time of valve seating to prevent water hammering. In the non-water hammering check valve device, a valve disc (4) is connected to an arm portion (5) through a valve disc support shaft (6) with a required freedom of swinging, and the arm portion (5) is connected to a valve body (1) through an arm support shaft (7). At the time of valve opening, the valve disc (4) is caused by an additional acting force, which turns the valve disc (4) about the valve disc support shalt (6), to be floatingly supported in the flow passage while an upstream end (4a) of the valve disc and an upstream end (5a) of the arm portion preferentially abut against each other all the time. At the time of valve closing, a downstream end (4b) of the valve disc preferentially abuts against a valve seat (3), and in a subsequent valve seating stroke, the entire surface of the valve disc (4) comes into uniform and close contact with the valve seat (3) to prevent water hammering caused by counterflow.

2. 发明专利

DE69429451T2 未知
公开(公告)号：DE69429451T2
公开(公告)日：2002-06-13
申请号：DE69429451
申请日：1994-10-28
申请人： YOKOTA SEISAKUSHO HIROSHIMA KK , YOKOTA HIROSHI , YOKOTA SHINGO
发明人： YOKOTA HIROSHI , YOKOTA SHINGO
IPC分类号： F04D9/02
摘要： A self-sucking centrifugal pump capable of displaying excellent self-sucking and pumping performance without changing the shape of a volute type centrifugal pump which already has a nearly perfect shape. The basic principle of a self-suction operation in which a gas-water mixture is pumped by a vortex current generated in a vane wheel by circulating self-sucking water by utilizing the characteristics of larger and smaller volute chambers formed in an outer circumferential portion of the vane wheel is clearly disclosed in Japanese Patent Publication No. 3039/1953 entitled "Double Volute Chamber Type Centrifugal Pump". In a conventional centrifugal pump of this kind, those skilled in the art were intent on supporting a tail portion of a whirlwind type hollow, which occurs due to a self-suction swirl current for the gas-water centrifugal separation, on a limited part, and could not solve the new derivative technical problems. The present invention has first solved the technical problems definitely by forming in an upper portion of a self-suction water separating chamber e a helical guide flow passage F extending in the direction in which a rising part of a liquid surface occurring due to the centrifugal force of a self-section swirl current is wound down; forming in a bottom portion E of the separating chamber e a wind-out flow passage d extending in the direction in which an outer circumferential portion of the self-suction swirl current is introduced preferentially into a larger volute chamber v2; and forming in a cylindrical wall surface at a lower portion of the separating chamber e a helical guide flow passage G extending in the direction in which an outer circumferential portion of the self-suction swirl current is introduced preferentially into the larger volute chamber v2, the present invention having obtained a self-section type centrifugal pump capable of sending a set current advantageous for a subsequent stage to the same stage.

3. 发明专利

DE69429451D1 未知
公开(公告)号：DE69429451D1
公开(公告)日：2002-01-24
申请号：DE69429451
申请日：1994-10-28
申请人： YOKOTA SEISAKUSHO HIROSHIMA KK , YOKOTA HIROSHI , YOKOTA SHINGO
发明人： YOKOTA HIROSHI , YOKOTA SHINGO
IPC分类号： F04D9/02
摘要： A self-sucking centrifugal pump capable of displaying excellent self-sucking and pumping performance without changing the shape of a volute type centrifugal pump which already has a nearly perfect shape. The basic principle of a self-suction operation in which a gas-water mixture is pumped by a vortex current generated in a vane wheel by circulating self-sucking water by utilizing the characteristics of larger and smaller volute chambers formed in an outer circumferential portion of the vane wheel is clearly disclosed in Japanese Patent Publication No. 3039/1953 entitled "Double Volute Chamber Type Centrifugal Pump". In a conventional centrifugal pump of this kind, those skilled in the art were intent on supporting a tail portion of a whirlwind type hollow, which occurs due to a self-suction swirl current for the gas-water centrifugal separation, on a limited part, and could not solve the new derivative technical problems. The present invention has first solved the technical problems definitely by forming in an upper portion of a self-suction water separating chamber e a helical guide flow passage F extending in the direction in which a rising part of a liquid surface occurring due to the centrifugal force of a self-section swirl current is wound down; forming in a bottom portion E of the separating chamber e a wind-out flow passage d extending in the direction in which an outer circumferential portion of the self-suction swirl current is introduced preferentially into a larger volute chamber v2; and forming in a cylindrical wall surface at a lower portion of the separating chamber e a helical guide flow passage G extending in the direction in which an outer circumferential portion of the self-suction swirl current is introduced preferentially into the larger volute chamber v2, the present invention having obtained a self-section type centrifugal pump capable of sending a set current advantageous for a subsequent stage to the same stage.

4. 发明专利

DE69511430D1 未知
公开(公告)号：DE69511430D1
公开(公告)日：1999-09-16
申请号：DE69511430
申请日：1995-12-01
申请人： YOKOTA SEISAKUSHO HIROSHIMA KK , YOKOTA HIROSHI , YOKOTA SHINGO
发明人： YOKOTA HIROSHI , YOKOTA SHINGO
IPC分类号： F16K15/03 , F16K47/02
摘要： The invention provides a reasonable, non-water hammering check valve device which radically dissolves a technical problem unsolved in conventional, non-water hammering check valves, is simple and precise in construction to provide less valve resistance loss at a predetermined maximum flow-rate, and in which, when input to a pump is cut off, a valve disc can readily respond to rapid status changes in flow to be free of delay in valve closing movement, and when flow in a flow passage in a direction of discharge loses inertia to stop, the valve disc.substantially comes into contact with the valve seat and gently contacts with the valve seat at that time to prevent water hammering and impulsive sounds. In the check valve device, the single-lobe valve disc and the valve seat are constructed so as to easily follow up movements of passing fluid, the valve disc is connected to a braking device through a linear movement transmitting mechanism, and the braking device and the movement transmitting mechanism are constructed to entirely eliminate influences such as braking and friction on actuating portions and sealing portions which cause deceleration of valve closing movement during a period from the valve closing starting by the valve disc to immediately before valve seating, whereby gentle braking is limitedly effected in a short period from immediately before valve seating to the valve seating to prevent water hammering and impulsive noise at the time of valve seating. Further, timing of valve seating can be adjusted by means of a braking start position adjusting portion, a bypass adjusting valve of the braking device, adjustment of biasing forces of a valve closing biasing member and the like.

5. 发明专利

GB2333863B Automatic regulating valve apparatus 未知
公开(公告)号：GB2333863B
公开(公告)日：2000-11-29
申请号：GB9907779
申请日：1997-10-02
申请人： YOKOTA MFG , YOKOTA HIROSHI , YOKOTA SHINGO
发明人： YOKOTA HIROSHI , YOKOTA SHINGO
IPC分类号： F16K31/363 , G05D9/04 , G05D16/16 , F16K31/122 , F16K17/22 , G05D7/03
摘要： An automatic regulating valve apparatus comprises a main valve unit, and a pilot valve unit operatively connected to the main valve unit to control the main valve unit. The main valve unit comprises a main valve casing, a main valve element disposed in the main valve casing, and a main valve driving member disposed in the main valve casing together with the main valve element and having a pressure receiving area greater than that of the main valve element, the main valve element is disposed on the upstream side of a valve seat so as to form a restricting passage between the main valve element and the main valve seat, and the main valve driving member is disposed for sliding movement in a space defined by a cylindrical wall formed in the main valve casing so as to define a main valve driving pressure chamber together with the cylindrical wall. The pilot valve unit comprises pilot valves A and B which are operated for opening and closing operations according to the variation of a pressure difference across an orifice included in the main valve unit, a pressure difference across the main valve unit, liquid level on the downstream side of the main valve unit or the pressure on the upstream side of the main valve unit. The pilot valve A and the pilot valve B are arranged in series and connected between the upstream and the downstream side of the main valve unit by connecting passages with a chamber between the pilot valves A and B connected to the main valve driving pressure chamber. The pressure in the main valve driving pressure chamber is varied by the coordinated operations of the pilot valves A and B to regulate the opening of the main valve unit. Thus, the automatic regulating valve apparatus 4 exercises automatic control functions including a constant-flow control function, an emergency shutoff function, a liquid level control function and an upstream pressure control function.

6. 发明专利

GB2331125A8 Self-priming type centrifugal pump 未知
公开(公告)号：GB2331125A8
公开(公告)日：1999-05-17
申请号：GB9901454
申请日：1997-03-17
申请人： YOKOTA MFG , YOKOTA HIROSHI , YOKOTA SHINGO
发明人： YOKOTA HIROSHI , YOKOTA SHINGO
IPC分类号： F04D5/00 , F04D7/04 , F04D9/04 , F04D15/00 , F04D1/00
摘要： PCT No. PCT/JP97/00857 Sec. 371 Date Jan. 22, 1999 Sec. 102(e) Date Jan. 22, 1999 PCT Filed Mar. 17, 1997 PCT Pub. No. WO98/04833 PCT Pub. Date Feb. 5, 1998The invention provides a self-priming centrifugal pump capable of sucking up and pumping a highly viscous liquid containing muddy substances including a large amount of bubbles, and solid foreign matters, of preventing the flow of the liquid from the side of a main pump unit into a vacuum device and from the vacuum device into the main pump unit at all stages of operation including starting, operating and stopping stages and of perfectly automatic operation, and very economical in costs of equipment and maintenance. The self-priming centrifugal pump has a main pump unit for pumping a liquid, an auxiliary pump unit for centrifugal gas-liquid separation, and an exhaust vacuum device. A region in the vicinity of a central part of an impeller included in the main pump unit is connected via a passage having a small passage area as compared with the discharge ability of the auxiliary pump unit to the suction opening of the auxiliary pump unit, the discharge opening of the auxiliary pump unit is connected to the suction opening of the main pump unit by a return passage, and a region in the vicinity of a central part of the impeller of the auxiliary pump unit is connected via an exhaust passage to the vacuum device. The exhaust passage includes in series therein a slow-acting valve which opens with a delay after the connection of a prime mover for driving the self-priming centrifugal pump to a power source, and a quick-acting valve which closes immediately after the disconnection of the prime mover from the power source.

7. 发明公开

EP0753693A4 COMPOUND ACTION TYPE NON-WATER HAMMERING CHECK VALVE DEVICE 失效
标题翻译：止回阀有减震器水
公开(公告)号：EP0753693A4
公开(公告)日：1999-05-26
申请号：EP95906528
申请日：1995-01-27
申请人： YOKOTA MFG , YOKOTA HIROSHI , YOKOTA SHINGO
发明人： YOKOTA HIROSHI , YOKOTA SHINGO
IPC分类号： E03C1/10 , F16K1/20 , F16K15/03 , F16K15/18 , F16K47/00 , F16K47/02 , F16L55/055
CPC分类号： E03C1/104 , F16K1/2007 , F16K15/03 , F16K15/033 , F16K15/181 , F16K47/00 , F16K47/023 , F16L55/055 , Y10T137/785 , Y10T137/7898 , Y10T137/7901
摘要： The invention has its object to radically resolve an untapped technical issue in a non-water hammering check valve device, in which a valve disc, a valve seat and a surrounding flow passage are configured such that the valve disc is substantially seated on the valve seat at the time when input to a pump is shut off and a discharge flow in the flow passage loses inertia to stop, and to provide a reasonable non-water hammering check valve device of a simple and clear construction which suffers a small resistance loss of a valve at the time of a predetermined maximum flow rate, can readily accommodate an abrupt change in a flow state without delay in valve closing operation and provides a uniform and close seating on the valve seat at the time of valve seating to prevent water hammering. In the non-water hammering check valve device, a valve disc (4) is connected to an arm portion (5) through a valve disc support shaft (6) with a required freedom of swinging, and the arm portion (5) is connected to a valve body (1) through an arm support shaft (7). At the time of valve opening, the valve disc (4) is caused by an additional acting force, which turns the valve disc (4) about the valve disc support shaft (6), to be floatingly supported in the flow passage while an upstream end (4a) of the valve disc and an upstream end (5a) of the arm portion preferentially abut against each other all the time. At the time of valve closing, a downstream end (4b) of the valve disc preferentially abuts against a valve seat (3), and in a subsequent valve seating stroke, the entire surface of the valve disc (4) comes into uniform and close contact with the valve seat (3) to prevent water hammering caused by counterflow.

8. 发明公开

EP0797033A4 NON-WATER HAMMERING CHECK VALVE DEVICE 失效
标题翻译：止回阀，防止水SHOCK
公开(公告)号：EP0797033A4
公开(公告)日：1998-02-25
申请号：EP95938630
申请日：1995-12-01
申请人： YOKOTA MFG , YOKOTA HIROSHI , YOKOTA SHINGO
发明人： YOKOTA HIROSHI , YOKOTA SHINGO
IPC分类号： F16K15/03 , F16K47/02
CPC分类号： F16K47/023 , F16K15/033 , Y10T137/785 , Y10T137/7898
摘要： The invention provides a reasonable, non-water hammering check valve device which radically dissolves a technical problem unsolved in conventional, non-water hammering check valves, is simple and precise in construction to provide less valve resistance loss at a predetermined maximum flow-rate, and in which, when input to a pump is cut off, a valve disc can readily respond to rapid status changes in flow to be free of delay in valve closing movement, and when flow in a flow passage in a direction of discharge loses inertia to stop, the valve disc substantially comes into contact with the valve seat and gently contacts with the valve seat at that time to prevent water hammering and impulsive sounds. In the check valve device, the single-lobe valve disc and the valve seat are constructed so as to easily follow up movements of passing fluid, the valve disc is connected to a braking device through a linear movement transmitting mechanism, and the braking device and the movement transmitting mechanism are constructed to entirely eliminate influences such as braking and friction on actuating portions and sealing portions which cause deceleration of valve closing movement during a period from the valve closing starting by the valve disc to immediately before valve seating, whereby gentle braking is limitedly effected in a short period from immediately before valve seating to the valve seating to prevent water hammering and impulsive noise at the time of valve seating. Further, timing of valve seating can be adjusted by means of a braking start position adjusting portion, a bypass adjusting valve of the braking device, adjustment of biasing forces of a valve closing biasing member and the like.

9. 发明公开

EP0732504A4 SELF-SUCKING CENTRIFUGAL PUMP 失效
标题翻译：自旋转泵
公开(公告)号：EP0732504A4
公开(公告)日：1996-12-18
申请号：EP95904958
申请日：1994-10-28
申请人： YOKOTA MFG , YOKOTA HIROSHI , YOKOTA SHINGO
发明人： YOKOTA HIROSHI , YOKOTA SHINGO
IPC分类号： F04D9/02
CPC分类号： F04D9/02
摘要： A self-sucking centrifugal pump capable of displaying excellent self-sucking and pumping performance without changing the shape of a volute type centrifugal pump which already has a nearly perfect shape. The basic principle of a self-suction operation in which a gas-water mixture is pumped by a vortex current generated in a vane wheel by circulating self-sucking water by utilizing the characteristics of larger and smaller volute chambers formed in an outer circumferential portion of the vane wheel is clearly disclosed in Japanese Patent Publication No. 3039/1953 entitled "Double Volute Chamber Type Centrifugal Pump". In a conventional centrifugal pump of this kind, those skilled in the art were intent on supporting a tail portion of a whirlwind type hollow, which occurs due to a self-suction swirl current for the gas-water centrifugal separation, on a limited part, and could not solve the new derivative technical problems. The present invention has first solved the technical problems definitely by forming in an upper portion of a self-suction water separating chamber e a helical guide flow passage F extending in the direction in which a rising part of a liquid surface occurring due to the centrifugal force of a self-section swirl current is wound down; forming in a bottom portion E of the separating chamber e a wind-out flow passage d extending in the direction in which an outer circumferential portion of the self-suction swirl current is introduced preferentially into a larger volute chamber v2; and forming in a cylindrical wall surface at a lower portion of the separating chamber e a helical guide flow passage G extending in the direction in which an outer circumferential portion of the self-suction swirl current is introduced preferentially into the larger volute chamber v2, the present invention having obtained a self-section type centrifugal pump capable of sending a set current advantageous for a subsequent stage to the same stage.

10. 发明专利

AT210786T 未知
公开(公告)号：AT210786T
公开(公告)日：2001-12-15
申请号：AT95904958
申请日：1994-10-28
申请人： YOKOTA MFG , YOKOTA HIROSHI , YOKOTA SHINGO
发明人： YOKOTA HIROSHI , YOKOTA SHINGO
IPC分类号： F04D9/02
摘要： A self-sucking centrifugal pump capable of displaying excellent self-sucking and pumping performance without changing the shape of a volute type centrifugal pump which already has a nearly perfect shape. The basic principle of a self-suction operation in which a gas-water mixture is pumped by a vortex current generated in a vane wheel by circulating self-sucking water by utilizing the characteristics of larger and smaller volute chambers formed in an outer circumferential portion of the vane wheel is clearly disclosed in Japanese Patent Publication No. 3039/1953 entitled "Double Volute Chamber Type Centrifugal Pump". In a conventional centrifugal pump of this kind, those skilled in the art were intent on supporting a tail portion of a whirlwind type hollow, which occurs due to a self-suction swirl current for the gas-water centrifugal separation, on a limited part, and could not solve the new derivative technical problems. The present invention has first solved the technical problems definitely by forming in an upper portion of a self-suction water separating chamber e a helical guide flow passage F extending in the direction in which a rising part of a liquid surface occurring due to the centrifugal force of a self-section swirl current is wound down; forming in a bottom portion E of the separating chamber e a wind-out flow passage d extending in the direction in which an outer circumferential portion of the self-suction swirl current is introduced preferentially into a larger volute chamber v2; and forming in a cylindrical wall surface at a lower portion of the separating chamber e a helical guide flow passage G extending in the direction in which an outer circumferential portion of the self-suction swirl current is introduced preferentially into the larger volute chamber v2, the present invention having obtained a self-section type centrifugal pump capable of sending a set current advantageous for a subsequent stage to the same stage.

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