CN2204901Y

CN2204901Y - Flexible slow-shut check valve

Info

Publication number: CN2204901Y
Application number: CN 94244032
Authority: CN
Inventors: 黄成卫
Original assignee: YAMEI BUTTERFLY VALVE FACTORY WUHAN CITY
Current assignee: YAMEI BUTTERFLY VALVE FACTORY WUHAN CITY
Priority date: 1994-10-25
Filing date: 1994-10-25
Publication date: 1995-08-09
Anticipated expiration: 2004-10-25

Abstract

The utility model relates to a flexible slow-shut check valve which is suitable for various fluid pipelines and comprises a left valve body, a right valve body, a valve plate arranged between two valve bodies and a slow shutting mechanism which is composed of an oil sump and an oil cylinder connected with an oil delivery pipe. The utility model is characterized in that the valve plate is a flexible valve plate of which the head is tightly clamped between the two valve bodies, and the lower side of the head is provided with a flexible narrow neck. The flexible slow-shut check valve has the advantages of simple structure, small volume, corrosion resistance, etc.

Description

Flexible slow-shut check valve

The utility model relates to a kind of Swing check valve, especially is applicable to the flexible buffer valve of fluid lines such as water purification, Yuan Shui, sewage.

At present the Swing check valve that uses has two kinds of structural types, and a kind of is to hang valve plate by valve shaft in the valve body, utilizes linkage mechanism control valve plate to open and close since valve shaft and normal phase of linkage mechanism be immersed in the water, so be easy to be corroded; Another kind of structural type is that valve plate is hung by valve shaft, and valve shaft stretches out the outer weight that connects of valve body, weight can produce moment with balance valve plate gravitational moment when valve plate is opened, close acceleration valve plate quick closing valve in the closed procedure at valve plate, but stretch out in the volume and weight that weight outside the valve body has not only increased valve, and weight falls down and hurts sb.'s feelings easily when having a power failure suddenly.

The purpose of this utility model is to overcome the deficiency of prior art, and a kind of corrosion-resistant, flexible buffer valve that volume is little, simple in structure is provided.

The technological scheme that realizes the utility model purpose is a kind of flexible buffer valve, comprise left and right valve body, be installed on the valve plate between two valve bodies, and the Slow Close mechanism that forms of the oil sump that connects by transport pipe and oil cylinder, its special way is that valve plate is flexible valve plate, the valve plate head is clamped between left and right two valve bodies, is a flexible thin neck under it.

And flexible thin neck is that rubber is made, and is lined with steel wire or similar reinforcement in the rubber.

And when being in closed condition, the angle between valve plate plane and the valve tube hub line is 50 °～60 °.

And the oil sump in the Slow Close mechanism is the one-way throttle oil sump, is provided with capsule between its end cap and oil sump seat, and the oil sump seat is fixed on the safety check influent side valve body and interior logical safety check.

By the structure of above-mentioned flexible buffer valve as can be known, during pump startup, current are washed valve plate open, valve plate revolves around the critical surface between its head and the flexible thin neck and the part that contacts with valve body and opens, when pump stops, medium flows backwards in the valve, the flow backwards impulse force of medium and the elastic-restoring force effect of self gravitation and flexible thin neck of valve plate closed rapidly, when dropping to a certain degree, valve plate slows down the valve plate closing velocity to reduce liquid hammer by Slow Close mechanism again, because safety check can have been satisfied to the performance requirement in the valve plate opening-closing process in the valve board structure and the position of this valve, so valve shaft need be installed in the valve body, and need not be provided with and stretch out the outer weight mechanism of valve body, thereby there is not the member that is corroded easily in the valve body, and reduced the volume and weight of valve.

The utility model is described in further detail below with reference to accompanying drawing.

Fig. 1 is a plan view of the present utility model.

Fig. 2 is the partial enlarged drawing of oil sump part in the Slow Close mechanism.

Fig. 3 is the valve board structure schematic representation.

As shown in Figure 1, flexible buffer valve described in the utility model is made up of the two large divisions, a part is by a left side,

right valve barrel

1,2 reach the valve body that the valve plate 6 between two valve bodies is formed, valve plate head 3 is fixed between two valve bodies, it under it flexible thin neck 4, valve plate 6 is to be made by the steel plate 17 of outsourcing rubber, flexible thin neck 4 is made by rubber, in be lined with steel wire 16 or similar reinforcement, in the safety check working procedure, valve plate 6 opens and closes around critical surface between its head 3 and the flexible thin neck 4 and the part that contacts with valve body, therefore valve shaft needn't be set separately in valve, and because after valve plate 6 unlatchings, flexible thin neck 4 produces an elastic-restoring force that makes valve plate 6 recover closed conditions all the time, quick closedown valve plate 6 when helping termination of pumping, valve plate plane 5 best down in off position with 12 one-tenth 50 °～60 ° on valve tube hub line, can reduce to close the absolute angle displacement of valve plate 6 like this, quick closedown valve plate when also helping termination of pumping; Another part of safety check is a Slow Close mechanism 10, form by oil cylinder 8 and oil sump 11 that transport pipe 9 connects, oil sump 11 is the one-way throttle oil sump, oil cylinder 8 is an one-way cylinder, promptly between oil sump 11 and oil cylinder 8, be provided with one-way valve in parallel and throttle valve, regulate piston 7 in this throttle valve may command oil cylinder 8 from the time length of working position return, promptly control the length of Slow Close time, as shown in Figure 2, the oil sump seat 15 of oil sump 11 is fixed on the safety check influent side valve body 1 and interior logical safety check, between oil sump seat 15 and oil sump end cap 13, be provided with the capsule made from rubber 14, intake pressure in the safety check can be transformed into oil pressure by capsule 14, through transport pipe 9, one-way valve promotes piston 7 motions in the oil cylinder 8, when the working procedure of flexible buffer valve described in the utility model is pump startup, current are washed valve plate 6 open, it is beautiful by the capsule 14 in the oil sump 11 that communicates with valve body hydraulic pressure to be transformed into oil simultaneously, through transport pipe 9, one-way valve is pushed to the working position with the piston 7 in the oil cylinder 8, when pump stops, medium flows backwards in the valve, the flow backwards impulse force of medium and the elastic-restoring force effect of self gravitation and flexible thin neck 4 of valve plate 6 closed rapidly, when the piston 7 in valve plate 6 falls promotion oil cylinder 8 resets, oil in the oil cylinder 8 is subjected to beautiful in throttle valve generation damping, valve plate 6 Slow Closes, reach the prolongation non-return time, reduce the purpose of liquid hammer.

Claims

1, a kind of flexible buffer valve that is applicable to various fluid lines, comprise left and right valve body [1,2], be installed on the valve plate [6] between two valve bodies, and the Slow Close mechanism [10] that forms of the oil sump [11] that connects by transport pipe [9] and oil cylinder [8], it is characterized in that: valve plate [6] is flexible valve plate, valve plate head [3] is clamped between left and right two valve bodies [1,2], is a flexible thin neck [4] under it.

2, flexible buffer valve according to claim 1 is characterized in that: the flexible thin neck ［ 4 ］ of safety check valve plate ［ 6 ］ is made for rubber, is lined with steel wire ［ 16 ］ or similar reinforcement in the rubber.

3, flexible buffer valve according to claim 1 and 2 is characterized in that: when being in closed condition, the angle between valve plate plane ［ 5 ］ and the valve tube hub line ［ 12 ］ is 50 °～60 °.

4, flexible buffer valve according to claim 1 and 2, it is characterized in that: the oil sump ［ 11 ］ in the Slow Close mechanism ［ 10 ］ is the one-way throttle oil sump, be provided with capsule ［ 14 ］ between its end cap ［ 13 ］ and oil sump seat ［ 15 ］, oil sump seat ［ 15 ］ is fixed in safety check influent side valve body ［ 1 ］ and goes up also interior logical safety check.