CN2172822Y

CN2172822Y - Butterfly check valve

Info

Publication number: CN2172822Y
Application number: CN 93240166
Authority: CN
Inventors: 邹真元
Original assignee: SHANGJIE BUTTERGLY VALVE FACTORY ZHENGZHOU HENAN PROV
Current assignee: SHANGJIE BUTTERGLY VALVE FACTORY ZHENGZHOU HENAN PROV
Priority date: 1993-09-25
Filing date: 1993-09-25
Publication date: 1994-07-27
Anticipated expiration: 2003-09-25

Abstract

The utility model relates to a micro-resistance slow-closing butterfly check valve which is composed of a valve body 1, valve plates 2, an axis 3, a spring 4, a controller 6, an executor 7, etc. Two semi-circular-shaped valve plates 2 are rotatablely arranged on the axis 3 and are compacted by the spring 4; the action of the executor 7 is automatically controlled by the controller 6 through the pressure of media, making the valve plates slowly open in order to decrease the resistance force when the valve plates are opened. When the valve plates 2 are closed, the executor 7 blocks the valve plates 2, making the valve plates 2 not immediately closed, but slowly closed by the throttled effect of a check throttled valve 61, decreasing the refluxing impact of the medium and protecting the safety of the conveying pipe lines and equipment.

Description

Butterfly check valve

The utility model relates to the butterfly check valve, particularly micro-resistance slowly-closed butterfly check valve that a liquid is carried usefulness.

At fluid pipeline for example in the aqueduct, for prevent termination of pumping or when outage water backflow, in pipeline, adopt safety check, current safety check has Swing check valve, and this valve size is huger, heavy, and the resistance of convection cell is also bigger, and existing safety check is when cutting out, owing to there is not damping device, the impact force action that makes backwater has damage to pipeline and pump on pipeline.

The utility model provides a kind of micro-resistance slowly-closed butterfly check valve, and this valve has that volume is little, structure is simpler, but opening resistance little, slowly close, the impact force when avoiding backwater can be protected the safety of pipeline and equipment.

The utility model is the pressure by fed sheet of a media, controls the action of final controlling element 7 by controller 6, when driving valve, make final controlling element 7 earlier valve 2 be opened a crescent shape passage, and then open greatly, the valve opening resistance is reduced to standard-sized sheet, when closing valve, valve plate 2 is performed device 7 and blocks, and it can not be closed immediately, but passes through the throttling action of one-way throttle valve 61, it is slowly closed, when having avoided closing valve, the flow-reversing impingement in the transfer line is to guarantee the safety of pipeline and equipment.The utility model is achieved in that it is by valve body 1, valve plate 2, axle 3, spring 4, column 5, controller 6, final controlling element 7, oil pipe 8, water clock pipe 9 is formed, the axle 3 and the column 5 of parallelization are housed on the valve body 1, two semicircular valve plates 2 are housed on axle 3 rotationally, one end hook of the spring 4 on the axle 3 is on column 5, the other end is pressed on the valve plate 2 with elastic force, make valve plate 2 in the closed position, be contained in the controller 6 on the control mouth 11 of valve body 1, at it and be contained between the final controlling element 7 on the valve body 1, be connected with oil pipe 8, final controlling element 7 also links to each other with oil drain out 12 on the valve body 1 through water clock pipe 9; The control mouth 11 of valve body 1 is positioned at import 13 1 sides, and communicates with passage T; On controller 6 comprises cylinder body 63 and is contained in cylinder body 63 and with its one-way throttle valve 61 of communications and liaison mutually, and be fixed in diaphragm 62 between cylinder body 63 end faces and control mouthful 11 end faces; Final controlling element 7 is by being contained in cylinder sleeve 71 in the valve body 1, being contained in piston 74 in the cylinder sleeve 71, being contained in the seal ring 73 on the piston 74 and forming with the plug screw 76 that screw thread is screwed in cylinder sleeve 71 ends, piston 74 is divided into two chambeies with cylinder sleeve 71, in the oil pocket 72 of cylinder sleeve 71, by hole 711 through pipe joint 81 and oil pipe 8 communications and liaison mutually, in the cavity 75 of cylinder sleeve 71, by hole 712 through pipe joint 91 and water clock pipe 9 communications and liaison mutually; The one-way throttle valve 61 of the other end of oil pipe 8 on pipe joint 82 and controller 6 be communications and liaison mutually; The other end of water clock pipe 9 is through the oil drain out 12 of pipe joint 92 and valve body 1 communications and liaison mutually, when this safety check is not worked, valve plate 2 is closed this valve under spring 4 pressure, when pipeline begins transporting water, the water that has pressure affacts on this valve plate 2, this moment, valve plate 2 was because the effect of spring 4 unlatching as yet, hydraulic action is to diaphragm 62, make diaphragm promote fluid in the cylinder body 63 of controller 6 through one-way throttle valve 61 minutes two tunnel through oil pipe 8, pipe joint 81 flows in the oil pocket 72 of final controlling element 7, promoting piston 74 moves to cavity 75 directions, a crescent shape passage is opened with valve plate 2 in piston 74 ends, current are passed through,, valve plate 2 is opened greatly to standard-sized sheet along with current continue to pass through, the resistance of start is reduced, and it is steady to open valve events.When this direction flows, these one-way throttle valve 6 no throttling actions.When water pump stops, import 13 1 side hydraulic pressures of valve body 1 descend, disappear, the water of valve body 1 outlet 14 1 sides is to import 13 1 side refluxs, under recirculation water and spring 4 effects, valve plate 2 is closed, when being closed to certain position, valve plate 2 bumps against the end of piston 4, and piston 4 is promoted to oil pocket 72 directions from cavity 75, makes fluid in the oil pocket 72 along pipe joint 81, oil pipe 8, one-way throttle valve 61, flow back in the cylinder body 63 of controller 6,61 throttling actions of one-way throttle valve this moment, fluid slowly flows back in the cylinder body 63, and valve plate 2 is closed lentamente, when having avoided valve plate 2 to close suddenly, the impact that water refluxes.The oil that leaks in the oil pocket 72 in the cavity 75 can be discharged through water clock pipe 92.The utility model is owing to adopted mechanisms such as controller 6 and final controlling element 7; make at pipeline conveyance fluid medium for example during water; opening resistance reduces; stable action; when situations such as termination of pumping or outage take place; this safety check can slowly cut out, and eliminate the safety that backwater impacts, protects pipeline and equipment, and above-mentioned action can be carried out automatically all.The utility model is simple in structure, and the more similar safety check of volume is little, and weight is corresponding to be alleviated.

Do concrete introduction with embodiment below.

Fig. 1 is a front view of the present utility model;

Fig. 2 is the A-A sectional drawing among Fig. 1;

Fig. 3 is the B-B sectional drawing among Fig. 1.

Be the front view and the A-A sectional drawing of the micro-resistance slowly-closed formula bivalve butterfly shaped check valve that formula connects with flange last time as depicted in figs. 1 and 2, outlet 14 1 sides at valve body 1, parallel axle 3 and the column 5 of being equipped with, two semicircular valve plates 2 rotationally on axle 3, one end hook of the spring 4 on the axle 3 is on column 5, the other end is pressed on the valve plate 2 with elastic force, be contained in the controller 6 on the control mouth 11 of valve body 1, at it and be contained between the final controlling element 7 on the valve body 1, be connected with oil pipe 8, this final controlling element 7 also links to each other with oil drain out 12 on the valve body 1 through water clock pipe 9; The control mouth 11 of valve body 1 is positioned at import 13 1 sides, and 17 communicate with the transfer passage T of this safety check through the hole, two sides of passage T all have

flange plate

15,16 respectively to link with transfer line, when work, its course of action is as follows: before the pipeline fed sheet of a media, two clack valve plates 2 of this safety check are closed under spring 4 effects, when the pipeline transportation work begins, the medium that has pressure is carried by pump and affacted on the valve plate 2 through pipeline, and the designing requirement of this valve is: the pressure of medium that is transported to entry end 13 1 sides is greater than outlet end 14 about 1kg/cm ²The time, valve plate 2 can be opened, the medium that be transferred this moment enters into diaphragm 62 belows by the aperture 17 of valve body 1 top, promote diaphragm upwards pressure through one-way throttle valve 61, divide two the tunnel to pass in the oil pocket 72 of final controlling element 7, as shown in Figure 3 through oil pipe 8, pipe joint 81, promoting piston 74 stretches out, valve plate 2 is opened a crescent shape passage, and shown in imaginary line among Fig. 3, and the medium that is thereupon flow through is successively opened valve plate 2 greatly and is put in place.When the transfer pump in the pipeline quits work, medium begins to reflux, under the effect of backflow power and spring 4, valve plate 2 quick closedowns are to the appropriate location, when promptly running into the head 741 of the piston 74 that stretches out, piston 74 is moving to pushing back, make fluid from the oil pocket 72 of final controlling element 7 through pipe joint 81, oil pipe 8, pipe joint 82, one-way throttle valve 61 flow back in the cylinder body 63 of controller 6, as shown in Figure 1,61 throttling actions of one-way throttle valve this moment, the slow throttling of fluid with refluxing is slowly return the piston 74 of final controlling element 7, causes the valve plate 2 of safety check slowly to be closed, treat that backwater impacts after the peak, closes fully again.As shown in Figure 3, when oil pocket 72 work, has few fluid under pressure, leak into the cavity 75 from oil pocket 72, for it is not leaked in the transfer line, flow in as shown in Figure 2 the oil drain out 12, during to some by hole 712, pipe joint 91, water clock pipe 9, to cover 121 and take off, waste oil will be emitted.The end towards valve plate 2 at piston 74 is equipped with rubber packet header 741, towards import 13 1 sides, rubber plate 21 is housed at valve plate 2, shakes and sound to reduce as buffering.

Present embodiment is a HDH48X-10Q type micro-resistance slowly-closed butterfly check valve, the one-way throttle valve 61 that adopts is commercially available manufactured good, diaphragm 62 is by exterior-coated nitrile rubber article, the seal ring 73 that is contained on the piston 74 is the Yx shape seal ring of urethane rubber system, push down with pressing plate 742, and be fixed on piston 74 end faces, compare with the Swing check valve of equal capability with screw 743, its length only is the former 1/3rd, and corresponding weight also reduces to 1/3rd.

Claims

1, a kind of micro-resistance slowly-closed butterfly check valve, it is by valve body 1, valve plate 2, axle 3, spring 4, column 5, controller 6, final controlling element 7, oil pipe 8 and water clock pipe 9 are formed, it is characterized in that: axle 3 and column 5 that parallelization is housed on the valve body 1, two semicircular valve plates 2 are housed on axle 3 rotationally, one end hook of the spring 4 on the axle 3 is on column 5, the other end is pressed on the valve plate 2 with elastic force, make valve plate 2 in the closed position, be contained in the controller 6 on the control mouth 11 on the valve body 1, it and be contained between the final controlling element 7 on the valve body 1 and be connected with oil pipe 8, final controlling element 7 also links to each other with oil drain out 12 on the valve body 1 through water clock pipe 9.

2, by the safety check described in the claim 1, it is characterized in that: the control mouth 11 of valve body 1 is positioned at import 13 1 sides, and communicates with passage T.

3, by the safety check described in the claim 1, it is characterized in that: described controller 6 comprises cylinder body 63, be contained on the cylinder body 63 and with its one-way throttle valve 61 of communications and liaison mutually, and be fixed in diaphragm 62 between cylinder body 63 end faces and control mouth 11 end faces.

4, by the safety check described in the claim 1, it is characterized in that: described final controlling element 7 is by being contained in cylinder sleeve 71 in the valve body 1, being contained in piston 74 in the cylinder sleeve 71, being contained in the seal ring 73 on the piston 74 and being screwed in cylinder sleeve 71 end plugs 76 with screw thread and form, in the oil pocket 72 of cylinder sleeve 71 by hole 711 through pipe joint 81 and oil pipe 8 communications and liaison mutually, in the cavity 75 of cylinder sleeve 71 by hole 712 through pipe joint 91 and water clock pipe 9 communications and liaison mutually.

5, by the safety check described in the claim 1, it is characterized in that: the one-way throttle valve 61 of the other end of described oil pipe 8 on pipe joint 82 and controller 6 be communications and liaison mutually.

6, by the safety check described in the claim 1, it is characterized in that: the other end of described water clock pipe 9 is through the oil drain out 12 of pipe joint 92 and valve body 1 communications and liaison mutually.

7, by the safety check described in the claim 1, it is characterized in that: described valve plate 2 is equipped with rubber plate 21 towards import 13 1 sides.

8, by the safety check described in the claim 1, it is characterized in that: the end towards valve plate 2 of described piston 74, be equipped with rubber packet header 741.