CN2450476Y - Slowly-closing noiseless check valve - Google Patents
Slowly-closing noiseless check valve Download PDFInfo
- Publication number
- CN2450476Y CN2450476Y CN 00262099 CN00262099U CN2450476Y CN 2450476 Y CN2450476 Y CN 2450476Y CN 00262099 CN00262099 CN 00262099 CN 00262099 U CN00262099 U CN 00262099U CN 2450476 Y CN2450476 Y CN 2450476Y
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- CN
- China
- Prior art keywords
- valve
- noiseless
- cushion dashpot
- safety check
- valve plate
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- 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.)
- Expired - Fee Related
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- Check Valves (AREA)
- Details Of Valves (AREA)
Abstract
The utility model relates to a check valve for preventing medium of pipelines from back flowing. A valve body is arranged on one side of a valve board which bears pump pressure. A valve board slow-closing damping mechanism is composed of a drainage hole and a buffering cylinder of the valve body, and a hard guide pipe which causes the drainage hole and the buffering cylinder to be mutually communicated. The hard guide pipe is provided with a flow adjusting valve. The utility model has the advantages that the damping mechanism directly uses the medium pressure of the pipeline to avoid the defect of the hydraulic damping mechanism with unreliability, not only the structure is simplified, but also the action is flexible and the slow-closing performance is reliable and safe, and the large noise generated by the valve board returning to the valve seat is eliminated.
Description
The utility model belongs to valve, especially relates to a kind of safety check that stops pipeline medium to flow backwards.
Slowly-closing is the basic demand to the larger caliber safety check, it is in order to prevent that the great water hammer ripple of collapsing force that pipeline far-end medium back flow forms is to pump machine and pipeline destroyed that speed is closed, usually its turn-back spring of relying on valve plate deadweight and acting on valve plate is realized, certainly, the maximum angle of valve plate unlatching also has limit restriction.Slow Close is that the requirement valve plate impingement phenomenon can not occur when soon touching with valve seat pass splice grafting, otherwise the bump of closing plate under the effect of reflux medium pressure will produce the earsplitting sound, and this sound is a kind of serious noise pollution source that must overcome.Existing safety check generally adopts the oil pressure damping to attempt to eliminate this sound in mechanism, and its structure comprises oil cylinder and the cushion dashpot that is located on the valve plate pump pressure side valve body, and oil pipe and modulating valve.The bowl-shape elastic diaphragm of oil cylinder places valve interior surface to bear pressure medium and deformation, and compressing hydraulic oil carries the piston rod of cushion dashpot and presses and eject, and adjusts the size that its buffering valve plate returns a power by modulating valve and reaches damping and the Slow Close effect.Facts have proved that there is the disadvantage of poor reliability in above-mentioned oil pressure damping mechanism, the Slow Close effect is undesirable, can not realize eliminating the purpose of the huge sound, and only is to reduce the sound.Tracing it to its cause is because elastic diaphragm has certain degree of hardness, and when not enough so that its pressurized deformation of pipe medium pressure, the piston rod of cushion dashpot can not eject and perform practically no function.Also because the inevitable leakage phenomenon of oil circuit of oil pressure damping mechanism, cause the pressure conduction efficiency to reduce and influence the Slow Close effect.
The purpose of this utility model provide a kind of Slow Close damping mechanism working stability reliable, can thoroughly eliminate valve plate and return the noiseless safety check of slowly-closing that seat produces the sound.
Above-mentioned purpose obtains by the following technical programs: the valve body of valve plate pump pressure side is provided with conduction hole, and the cushion dashpot medium inlet is connected by the hard conduit that has flow control valve with this conduction hole.
Said cushion dashpot, its end cap are provided with the energy storage pressure spring of support piston bar;
Said cushion dashpot, the external end head that its end cap is provided with it is threaded is provided with the adjustable lever that square toes and locknut, inner termination engage with the piston rod of backhaul limit position, the screw inner end of end cap is provided with the positive stop lug boss that engages with adjustable lever screw thread shoulder, and the groove of boss is inlaid with O-ring seal;
Said cushion dashpot, its cylinder body is provided with corrosion-proof lining, and the lining body is provided with the through hole of respective cylinder body medium inlet, the annular ditch groove that the liner arranged outside is connected with this through hole;
Said hard conduit one termination has filter, and its medium inlet is connected with the conduction hole of valve body.
The utility model is compared with an existing month technology has following outstanding advantage: 1, the Slow Close damping mechanism directly utilizes ducted medium, not only make its designs simplification, also make pressure medium directly be transmitted to piston rod and it is ejected, these characteristics were particularly outstanding when particularly pipe medium pressure was low, made this valve can thoroughly eliminate valve plate and returned the huge sound that seat produces.2, suitably adjust flow control valve and can make this valve can adapt to the needs of different pipeline pressures and latus rectum pipeline, reaching Slow Close does not have sound effective value.3, supplementary structure of the present utility model is the reliability that filter and energy storage pressure spring have further improved this valve Slow Close damping mechanism.
Further specify the utility model with drawings and Examples below.
Accompanying drawing 1 example structure partial cutaway schematic accompanying drawing 2 Figure 1A-A view accompanying drawing 3 cushion dashpot structural profile schematic representation
Embodiment is a kind of two eccentric valve plate structures of being commonly called as of oblique installing type valve plate that adopt as shown in Figure 1, 2, i.e. the structural type of valve plate 6 and valve seat 7 and valve body 1 decentraction, and it is little that it has flow resistance, opens and closes steadily and relatively energy-conservation characteristics.Valve body 1 is a pipeline shape, conveniently is connected with piping flange with the pump machine, and the axis pin base 5 of valve plate upper end makes valve plate tilting, and support seat 2 is installed with bearing pin 4 and rotational support valve plate, and bearing pin two ends symmetry is equipped with the turn-back spring 3 that acts on valve plate.The valve plate of present embodiment is fixed with elastic seal ring 13 by its inboard clamping plate, also can be designed to rigid seal as required.
The valve body that structure characteristic of the present utility model is embodied in valve plate pump pressure side shown in Figure 2 is that the medium input end of this valve is provided with conduction hole 8, this hole is connected with y-type filter 9, its outlet is connected to and is communicated with hard conduit 11 cushion dashpot 12 and that have flow control valve 10, and the flow control valve of enforcement is a needle value.
Cushion dashpot shown in Figure 3, end cap 18 inboards are provided with the energy storage pressure spring 14 of support piston bar 22, and its elastic force is allowed a choice according to pipeline pressure is different.The outer end is designed to the adjustable lever 20 of square toes for ease of adjustment, its screw thread shoulder section is threaded with end cap, the inner of end cap 18 screws is provided with the positive stop lug boss that engages with adjustable lever screw thread shoulder section, and the groove of boss is inlaid with O-ring seal 21, makes end cap and adjustable lever become rotary seal and is connected.The inner of adjustable lever can be used as the positioning rod of energy storage pressure spring 14, but more important role is to contact with the piston rod of backhaul limit position, deviates from unhelpful discharge and the piston rod backhaul of avoiding the cushion dashpot medium.Cylinder body inboard shown in Figure 3 is provided with the corrosion-proof lining 15 of stainless steel, through hole 15 ' corresponding with the medium inlet 16 of cylinder body, annular ditch groove 15 " is connected the closed dielectric passage to avoid liner radial displacement in service with through hole 15.In addition, the piston rod end of present embodiment is provided with rubber termination 23, is provided with seal rubber pad 17 between cylinder body and liner and the end cap, and adjustable lever also is provided with locknut 19.
Cushion dashpot among Fig. 1,2 is inclined in valve body, its piston rod is touched by rubber termination and valve plate side edge, if valve plate is other structural type such as vertical valve plate, then cushion dashpot is located at the valve body inboard, if valve plate is two lobe formula structures, buffering damping mechanism then of the present utility model should have two cushion dashpots that are located at the valve body inboard.
The course of action of this safety check 1,2 is illustrated in conjunction with the accompanying drawings, medium holds up valve plate 6 behind the pump startup, enter that cushion dashpot 12 ejects piston rod 22 and carry through conduction hole 8, filter 9, flow control valve 10 and hard conduit 11 when the medium drag flow is carried and press, valve plate is closed rapidly after the termination of pumping, contact with piston rod before returning seat, to have at Flow-rate adjustment valve action lower piston rod is enough to overcome the buffering support force that valve plate is subjected to reflux medium pressure, and this support force will progressively be released and be made noiseless time seat of valve plate.As seen, as long as pump startup pump pressure size no matter, pressure medium can both eject piston rod and have a reliable Slow Close effect.
Claims (5)
1, the noiseless safety check of slowly-closing, formed by pipeline shape valve body, valve plate and turn-back spring, valve seat, cushion dashpot, hard conduit and flow control valve, it is characterized in that: the valve body of valve plate pump pressure side is provided with conduction hole, and the cushion dashpot medium inlet is connected by the hard conduit that has flow control valve with this conduction hole.
2, noiseless safety check as claimed in claim 1 is characterized in that: said cushion dashpot, its end cap are provided with the energy storage pressure spring of support piston bar.
3, noiseless safety check as claimed in claim 1, it is characterized in that: said cushion dashpot, its end cap be provided be threaded with it, external end head is provided with the adjustable lever that square toes and locknut, inner termination engage with the piston rod of backhaul limit position, the screw inner end of end cap is provided with the positive stop lug boss that engages with adjustable lever screw thread shoulder, and the groove of boss is inlaid with O-ring seal.
4, noiseless safety check as claimed in claim 1 is characterized in that: said cushion dashpot, and its cylinder body is provided with corrosion-proof lining, and the lining body is provided with the through hole of respective cylinder body medium inlet, and the liner outside is provided with the annular ditch groove that is connected with through hole.
5, noiseless safety check as claimed in claim 1 is characterized in that: said hard conduit, and the one termination has filter, and its medium inlet is connected with the conduction hole of valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00262099 CN2450476Y (en) | 2000-11-17 | 2000-11-17 | Slowly-closing noiseless check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00262099 CN2450476Y (en) | 2000-11-17 | 2000-11-17 | Slowly-closing noiseless check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2450476Y true CN2450476Y (en) | 2001-09-26 |
Family
ID=33617463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00262099 Expired - Fee Related CN2450476Y (en) | 2000-11-17 | 2000-11-17 | Slowly-closing noiseless check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2450476Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042124A (en) * | 2015-08-12 | 2015-11-11 | 中国航空工业集团公司西安飞机设计研究所 | Check valve device at end of guiding pipe |
| CN106402436A (en) * | 2016-12-01 | 2017-02-15 | 芜湖市华益阀门制造有限公司 | 75-degree soft seal check valve |
| CN108700222A (en) * | 2015-12-10 | 2018-10-23 | 应用材料公司 | Closure or locking device for vacuum chamber |
-
2000
- 2000-11-17 CN CN 00262099 patent/CN2450476Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042124A (en) * | 2015-08-12 | 2015-11-11 | 中国航空工业集团公司西安飞机设计研究所 | Check valve device at end of guiding pipe |
| CN105042124B (en) * | 2015-08-12 | 2018-01-30 | 中国航空工业集团公司西安飞机设计研究所 | A kind of check valve device of catheter end head |
| CN108700222A (en) * | 2015-12-10 | 2018-10-23 | 应用材料公司 | Closure or locking device for vacuum chamber |
| CN108700222B (en) * | 2015-12-10 | 2021-05-11 | 应用材料公司 | Closing or locking device for a vacuum chamber |
| CN106402436A (en) * | 2016-12-01 | 2017-02-15 | 芜湖市华益阀门制造有限公司 | 75-degree soft seal check valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |