CN208431428U - A kind of Slow Close Valve - Google Patents

Abstract

The utility model relates to a kind of Slow Close Valves, including valve seat, valve body, valve deck, valve plate, valve plate counterweight and slow closing device, the slow closing device includes hydraulic cylinder, piston, piston adjusting yoke, oil inlet pipe and flowline, the piston adjusting yoke is set to side of the piston far from valve plate, the piston adjusting yoke passes through hydraulic cylinder one end and piston is connected, the other end is set to outside hydraulic cylinder, by the adjusting nut regulating piston being arranged thereon moved in hydraulic cylinder apart from size, the Slow Close Valve further includes regulating valve, the regulating valve is connect with flowline, to adjust flow rate of liquid in oil inlet pipe.The utility model controls the speed that piston is mobile in slow closing device by the regulating valve being arranged on flowline to achieve the purpose that prevent destructive water hammer from occurring.

Description

A kind of Slow Close Valve

Technical field

The utility model relates to field of check valves more particularly to a kind of Slow Close Valves.

Background technique

In liquid conducting pipes, the refluence of liquid, check-valves are generally all prevented in the output end installation check-valves of pump Refer to and flowed and automatic open and close flap by medium itself, for the valve for preventing medium from flowing backwards, the valve plate of existing check-valves Closing velocity the phenomenon that cannot controlling, be easy to cause water hammer.

Utility model content

The utility model to solve the above-mentioned problems, provides a kind of Slow Close Valve, by being arranged on flowline Regulating valve achievees the purpose that prevent destructive water hammer from occurring to control the mobile speed of piston in slow closing device.

To achieve the goals above, the utility model adopts the following technical solution:

A kind of Slow Close Valve, including valve seat, valve body, valve deck, valve plate, valve plate counterweight and slow closing device, the valve body It is set on valve seat, the valve deck is set on valve body, and the valve plate is rotatablely connected by valve shaft and valve body, and the valve plate is flat Weighing apparatus hammer is set on valve shaft, and the slow closing device is set to the corresponding position in one end with valve plate far from valve shaft of valve body Place, the slow closing device includes hydraulic cylinder, piston, piston adjusting yoke, oil inlet pipe and flowline, and the piston adjusting yoke is set It is placed in side of the piston far from valve plate, the piston adjusting yoke passes through hydraulic cylinder one end and piston is connected, and the other end is set to Outside hydraulic cylinder, by the adjusting nut regulating piston being arranged thereon moved in hydraulic cylinder apart from size, the Slow Close non-return Valve further includes regulating valve, and the regulating valve is connect with flowline, to adjust flow rate of liquid in oil inlet pipe.

Further, the piston adjusting yoke is set to side of the piston far from valve plate, and the piston adjusting yoke is worn It crosses hydraulic cylinder one end and piston is connected, the other end is set to outside hydraulic cylinder, is existed by the adjusting nut regulating piston being arranged thereon Moved in hydraulic cylinder apart from size.

Further, the regulating valve is needle type regulating valve.

Further, the material of the valve plate is steel plate and rubber, is integrally formed using steel plate and the vulcanization of rubber.

The utility model uses technical solution as above, is mainly used in industrial cycle water supply and sewage, city water supply and sewage, high level and builds It builds and the exit of the pressurization water-delivery pump of hotel for ending aqueous reflux and eliminating destructive water hammer ensures network security Operation.It has the beneficial effect that

1. having fully considered the requirement of use environment, reach shockproof, noiseless, run smoothly, it is ensured that hotel is lived The environment quiet of residence, and have the function of economize on electricity etc..

2. energy conservation: since valve plate is using light body structure (rubber and metallic combination structure), there is counterweight, local resistance is small, Open degree is big.Compared with swing check valve, conveying every kiloton water can economize on electricity 15~25 degree.

3. destructive water hammer is eliminated in limitation: since valve door closing system closes damping mechanism using back segment, with delaying to close Mode make the water locally flow backwards aerial drainage into system, valve plate follows first speed and closes rear Slow Close, thus substantially reduce termination of pumping flow backwards when Water pressure impact force, eliminate the generation of destructive water hammer peak value.

4. running smoothly, being shockproof, low noise.

5. maintenance cost is low, compared with swing check valve, maintenance cost 80% is reduced.

Detailed description of the invention

Fig. 1 show the cross-sectional view of the utility model embodiment.

Fig. 2 show the side view of the embodiment.

Specific embodiment

To further illustrate each embodiment, the utility model is provided with attached drawing.These attached drawings are in the utility model discloses A part of appearance mainly to illustrate embodiment, and can cooperate the associated description of specification former come the running for explaining embodiment Reason.Cooperation refers to these contents, and those of ordinary skill in the art will be understood that other possible embodiments and sheet are practical new The advantages of type.Component in figure is not necessarily to scale, and similar component symbol is conventionally used to indicate similar component.

Now in conjunction with the drawings and specific embodiments, the present invention will be further described.

As shown in Figure 1, 2, present embodiment discloses a kind of Slow Close Valve, including valve seat 1, valve body 2, valve deck 3, valve plate 4, Valve plate counterweight 5, slow closing device 7 and regulating valve 9.

The setting of the valve seat 1, valve body 2, valve deck 3, valve plate 4, valve plate counterweight 5, mutual alignment between slow closing device 7 It can be arranged such as the existing mutual alignment commonly used in Slow Close Valve, in the embodiment, the valve body 2 is set to valve seat 1 On, valve deck 3 is set on the valve body 2, and water flow is flowed into from right side in valve body 2 described in the embodiment, left side outflow, the valve Valve shaft 8 is arranged along water flow vertical direction in body 2, and valve plate 4 is arranged on the valve shaft 8, and the valve plate 4 can be rotated around valve shaft 8, The valve plate counterweight 5 is set on valve shaft 8, for showing the open and-shut mode of valve plate 4.

The slow closing device 7 is set to valve body 2 at one end of the separate valve shaft 8 of valve plate 4, including hydraulic cylinder 71, Piston 72, piston adjusting yoke 73, oil inlet pipe 74 and flowline 75, in order to ensure the leakproofness in valve, the hydraulic cylinder 71 with A sealing ring is arranged in the junction of valve body 2, and the piston 72 is set in hydraulic cylinder 71, can transport along the axial reciprocating of hydraulic cylinder 71 Dynamic, the piston adjusting yoke 73 is set to side of the piston 72 far from valve plate 4, and the piston adjusting yoke 73 passes through hydraulic cylinder 71 one end and piston 72 are connected, and the other end is set to outside hydraulic cylinder 71, is existed by the adjusting nut regulating piston 72 being arranged thereon Moved in hydraulic cylinder 71 apart from size.

The material that the valve seat 1, valve body 2, valve deck 3, valve plate 4, valve plate counterweight 5, slow closing device 7 use can be as existing Material used in common Slow Close Valve in technology, in the embodiment, the material that the valve body 2 and valve deck 3 use is ash Cast iron, cast steel or spheroidal graphite cast-iron select specific material according to nominal pressure and specification, in order to reduce hitting when valve plate 4 is closed Hit the power of generation, in the embodiment, the valve plate 4 uses the flexible material of outer layer, specifically used material be steel plate and 75% rubber, is integrally formed using steel plate and the vulcanization of rubber, and the material of the regulating valve 9 and piston 72 is casting brass or spheroidal graphite Cast iron.

When flow media enters 2 inside of valve body, flow media pressure pushes valve plate 4 to open, 74 feed pressure of oil inlet pipe Liquid heats piston 72 is moved to 4 direction of valve plate, is stretched out piston 72 and is pushed valve plate 4 to open jointly with flow media, makes valve plate 4 It is rotated around valve shaft 8, while valve plate counterweight 5 being driven to swing.

When flow media stops entering 2 inside of valve body, since the self weight of valve plate 4 closes 4 free-falling of valve plate, but by Extended position is in piston 72 and has withstood valve plate 4, is unable to completely close valve plate 4, there remains between about 1/5 or so unlatching Gap, such flow media still can pass through, and reduce water hammer surge pressure, limit the generation of destructive water hammer.

When valve plate 4 is pressed in 72 end of piston, liquid barrier in hydraulic cylinder 71 snapback of piston 72 is prevented The closing of valve plate 4, valve plate 4 pushes piston 72 to move to far from 4 direction of valve plate under the buffer brake effect of flow media at this time Dynamic, under the promotion of piston 72, the liquid in piston 72 is flowed out by flowline 75, until piston 72 returns to home position, valve Plate 4 finally completely closes.

The regulating valve 9 is connect with flowline 75, to adjust flow rate of liquid in flowline 75, in the embodiment, and the tune Section valve 9 is needle type regulating valve, by adjusting the opening size of regulating valve 9, controls the flow velocity of liquid in flowline 75, and then control The slack time that the movement velocity and valve plate 4 of piston 72 processed are closed, when the aperture of regulating valve 9 is big, the time that sluices is long, water hammer Small, otherwise aperture hour, a possibility that time that sluices is short, water hammer formation, is big, therefore the adjustable valve plate 4 of regulating valve 9 is closed Speed.

In the embodiment, when starting debugging, piston 72 can be stretched out overall length (pull rod exits length i.e. 72 overall length of piston) 2/3rds, then stop flow media inflow, check that can the size of water hammer and valve plate 4 close, water hammer is big, illustrates to adjust The aperture for saving valve 9 is small, if the closing of valve plate 4 is too slow, it is too long to illustrate that piston 72 stretches out.Ideal 9 aperture of regulating valve is arrived after debugging Afterwards, reuse that adjusting nut regulating piston 72 moves in hydraulic cylinder 71 apart from size, which should be with pressure of supply water, water delivery The operating conditions such as distance and relative relief have much relations, are proportional relationships between them.In the embodiment, the 4 Slow Close time of valve plate Length, the opening size of regulating valve 9 can be used to adjust, the preferred Slow Close time is 0~60 second.

Although specifically showing and describing the utility model in conjunction with preferred embodiment, those skilled in the art is answered This is understood, in the spirit and scope for not departing from the utility model defined by the appended claims, in form and details On the utility model can be made a variety of changes, be the protection scope of the utility model.

Claims (3)

1. a kind of Slow Close Valve, including valve seat, valve body, valve deck, valve plate, valve plate counterweight and slow closing device, the valve body are set It is placed on valve seat, the valve deck is set on valve body, and the valve plate is rotatablely connected by valve shaft and valve body, the valve plate balance Hammer is set on valve shaft, and the slow closing device is set at the position corresponding with the one end of valve plate far from valve shaft of valve body, It is characterized by: the slow closing device includes hydraulic cylinder, piston, piston adjusting yoke, oil inlet pipe and flowline, the piston tune Section pull rod is set to side of the piston far from valve plate, and the piston adjusting yoke passes through hydraulic cylinder one end and piston is connected, another End be set to outside hydraulic cylinder, by the adjusting nut regulating piston being arranged thereon moved in hydraulic cylinder apart from size, it is described Slow Close Valve further includes regulating valve, and the regulating valve is connect with flowline, to adjust flow rate of liquid in oil inlet pipe.

2. Slow Close Valve according to claim 1, it is characterised in that: the regulating valve is needle type regulating valve.

3. Slow Close Valve according to claim 1, it is characterised in that: the material of the valve plate is steel plate and rubber, is made It is integrally formed with steel plate and the vulcanization of rubber.