CN104265959A - Novel check valve - Google Patents
Novel check valve Download PDFInfo
- Publication number
- CN104265959A CN104265959A CN201410512152.XA CN201410512152A CN104265959A CN 104265959 A CN104265959 A CN 104265959A CN 201410512152 A CN201410512152 A CN 201410512152A CN 104265959 A CN104265959 A CN 104265959A
- Authority
- CN
- China
- Prior art keywords
- valve
- barrier film
- diaphragm
- valve body
- flap
- Prior art date
- 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.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/06—Check valves with guided rigid valve members with guided stems
- F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
- Check Valves (AREA)
Abstract
The invention discloses a novel check valve which comprises a valve body. A valve deck is arranged on the valve body; a valve clack which is opened and closed in a single direction is arranged in the valve body; a diaphragm seat on which a diaphragm and a diaphragm seat pressing plate are mounted is also arranged on the valve deck; a diaphragm upper cavity is formed between the diaphragm and the valve deck; a diaphragm lower cavity is formed between the diaphragm and the valve clack; a valve rod running through the valve clack is arranged on the diaphragm pressing plate; a compressed spring is arranged on the valve rod and between the diaphragm pressing plate and the valve clack; an inlet end of the valve body is communicated with the diaphragm upper cavity through one single-way valve and a pipeline; the outlet end of the valve body is communicated with the diaphragm upper cavity through a ball valve. A medium is filled with both the diaphragm upper cavity and the diaphragm lower cavity; a medium pressure of the diaphragm upper cavity enables the valve clack to be closed slowly, so that the closing speed of the valve clack is prevented, the slow closing and silencing effect is realized, and a water hammer phenomenon is prevented.
Description
Technical field
The present invention relates to a kind of ducted valve, be specifically related to a kind of can the safety check of slowly closing.
Background technique
Open-shut device is opened voluntarily by media flow and strength or closes, and the valve flow backwards to prevent medium is on safety check.Safety check belongs to self-acting valve class, is mainly used on the pipeline of medium one-way flow, only allows medium to flow to a direction, to try to avert accidents.Safety check divides by structure, can be divided into Lift check valve, Swing check valve and butterfly check valve three kinds.Lift check valve can be divided into vertical and straight-through type two kinds.Swing check valve is divided into single-lobe formula, Double-disc type and multi-clove type three kinds.Butterfly check valve is butterfly bivalve, butterfly single-lobe, above several safety check can be divided in Connecting format be threaded, Flange joint, welding be connected four kinds with wafer type.
General check valve closing velocity is fast, easily produces water attack, makes pressure suddenly increase, and destroy pipeline and equipment, noise is large.The problem that general check valve quick closedown brings, its water pump for industrial and mining enterprise and tall building, directly in drainage system, easily produces water hammer and water hammer produces, and can not reach the effect of safety shutdown.
Summary of the invention
The object of the present invention is to provide a kind of non-return valve, overcome existing closure of check ring speed fast, easily produce water attack, make pressure suddenly increase, destroy pipeline and equipment, the shortcoming that noise is large.
For achieving the above object, technological scheme of the present invention is: non-return valve, comprise valve body, described valve body is provided with valve gap, be provided with the flap of unidirectional opening and closing in described valve body, described valve gap is also provided with barrier film seat, described barrier film seat is provided with barrier film and barrier film pressing plate, form barrier film epicoele between described barrier film and valve gap, between described barrier film and flap, form barrier film cavity of resorption; Described barrier film pressing plate is provided with the valve rod that runs through flap, and described valve rod is provided with stage clip between barrier film pressing plate and flap; The entrance point of described valve body is communicated with barrier film epicoele with pipeline by an one-way valve, and the outlet end of described valve body is communicated with barrier film epicoele by ball valve.
When adopting technique scheme, during opening state, the medium of valve body entrance point enters barrier film epicoele through one-way valve.Regulate the aperture of one-way valve, make the medium entering barrier film epicoele act on barrier film pressing plate, counter-force is produced to flap, ensure that flap is slowly opened.During closed condition, valve body entrance point pressure reduces suddenly, and flap, under outlet pressures effect, will be closed.Owing to having installed ball valve at valve outlet end, medium enters barrier film epicoele by ball valve, due to the non-return effect of one-way valve, medium can not enter valve body entrance point again, meanwhile, is also filled with medium in barrier film cavity of resorption, the pressure medium of barrier film epicoele impels flap slowly closing, prevent flap closing velocity, reach Slow Close, quiet effect, prevent water hammer.By regulating the aperture of ball valve, the closing velocity of flap effectively can be controlled.
Further, also needle value is provided with between the entrance point of described valve body and one-way valve.Adopt needle value, the rate-of flow entering barrier film epicoele can be controlled better, reach the object controlling opening speed.
Further, described valve gap, barrier film seat are fixed by bolt and valve body.Adopt removably connecting of bolt, can change in time when diaphragm failures, reduce maintenance cost.
Further, described flap is provided with seal ring and sealing clamp.The sealing effect of flap can be improved better.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is the structural representation of non-return valve embodiment of the present invention.
Embodiment
As shown in Figure 1, non-return valve of the present invention, comprises valve body 1, valve body 1 has been bolted barrier film seat 8 and valve gap 9, is provided with the flap 5 of unidirectional opening and closing in valve body 1, and flap 5 is provided with seal ring 4 and sealing clamp 3.Barrier film seat 8 is provided with barrier film 10 and barrier film pressing plate 11, between barrier film 10 and valve gap 9, forms barrier film epicoele, between barrier film 10 and flap 5, form barrier film cavity of resorption; Described barrier film pressing plate 11 is provided with the valve rod 2 that runs through flap 5, and valve rod 2 is provided with stage clip 13 between barrier film pressing plate 11 and flap 5; The entrance point of described valve body 1 is communicated with barrier film epicoele with pipeline by a needle value 6, one-way valve 7, and the outlet end of valve body 1 is communicated with barrier film epicoele by ball valve 12.
When starting mode of pump, valve body 1 entrance point pressure impels flap 5 to overcome elastic force to open rapidly, and meanwhile, the medium of valve body 1 entrance point enters barrier film epicoele through needle value 6 and one-way valve 7.Regulate the aperture of needle value 6, make the medium entering barrier film epicoele act on barrier film pressing plate 11, counter-force is produced to flap 5, ensure that flap 5 is slowly opened.The aperture of regulation valve body 1 entrance point needle value 6, the opening speed of control valve body 1, ensures that the opening time of valve body 1 is greater than the starting time of pump motor, realizes underloading and open pump, prevent electric motor starting electric current excessive.
When water pump cuts out, valve body 1 entrance point pressure reduces suddenly, and flap 5, under outlet pressures effect, will be closed suddenly, and valve body 1 outlet pressures is risen sharply suddenly.Now easily produce water hammer, cause pipeline and device damage after valve, and produce very large noise.Owing to having installed return-flow system at valve body 1 outlet end, after valve, medium enters barrier film epicoele by ball valve 12, due to the non-return effect of one-way valve 7, medium can not enter entrance point, meanwhile, is also filled with medium in barrier film cavity of resorption, the pressure medium of barrier film epicoele impels flap 5 slowly closing, prevent flap 5 closing velocity, reach Slow Close, quiet effect, prevent water hammer.By regulating the aperture of ball valve 12, the closing velocity (i.e. the shut-in time of valve body 1) of flap 5 effectively can be controlled.Buffer valve has slow opening and Slow Close and the technical feature eliminating water hammer, achieves the generation of water hammer when underloading opens pump and prevents termination of pumping.After startup pump motor, namely valve realizes automatic on-off by water pump working specification.During actual use, before valve and after valve, also need each installation one deck valve door, so that maintenance.Mounting filter before valve, prevents the foreign material in pipe-line system from entering in safety check.Buffer valve answers horizontal position to install.If by valve installation in well, certain space for maintenance should be left.On pipeline, automatic control pressure vent should be installed by relevant specification, ensure the continuity flowing of water column.Valve should not be placed in temperature less than 0 DEG C environment.
Above-described is only the preferred embodiment of the present invention; should be understood that; for a person skilled in the art; under the prerequisite not departing from structure of the present invention; some distortion and improvement can also be made; these also should be considered as protection scope of the present invention, and these all can not affect effect of the invention process and practical applicability.
Claims (4)
1. non-return valve, comprise valve body, described valve body is provided with valve gap, the flap of unidirectional opening and closing is provided with in described valve body, it is characterized in that, described valve gap is also provided with barrier film seat, described barrier film seat is provided with barrier film and barrier film pressing plate, form barrier film epicoele between described barrier film and valve gap, between described barrier film and flap, form barrier film cavity of resorption; Described barrier film pressing plate is provided with the valve rod that runs through flap, and described valve rod is provided with stage clip between barrier film pressing plate and flap; The entrance point of described valve body is communicated with barrier film epicoele with pipeline by an one-way valve, and the outlet end of described valve body is communicated with barrier film epicoele by ball valve.
2. non-return valve according to claim 1, is characterized in that, is also provided with needle value between the entrance point of described valve body and one-way valve.
3. non-return valve according to claim 1, is characterized in that, described valve gap, barrier film seat are fixed by bolt and valve body.
4. non-return valve according to claim 1, is characterized in that, described flap is provided with seal ring and sealing clamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410512152.XA CN104265959A (en) | 2014-09-29 | 2014-09-29 | Novel check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410512152.XA CN104265959A (en) | 2014-09-29 | 2014-09-29 | Novel check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104265959A true CN104265959A (en) | 2015-01-07 |
Family
ID=52157513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410512152.XA Pending CN104265959A (en) | 2014-09-29 | 2014-09-29 | Novel check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104265959A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107504232A (en) * | 2017-09-21 | 2017-12-22 | 安徽荣达阀门有限公司 | A kind of novel slow-closing check-valves |
| CN109458463A (en) * | 2018-12-17 | 2019-03-12 | 威尔泵浦制造有限公司 | Delay Slow Close control valve with dirt eliminating function |
-
2014
- 2014-09-29 CN CN201410512152.XA patent/CN104265959A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107504232A (en) * | 2017-09-21 | 2017-12-22 | 安徽荣达阀门有限公司 | A kind of novel slow-closing check-valves |
| CN109458463A (en) * | 2018-12-17 | 2019-03-12 | 威尔泵浦制造有限公司 | Delay Slow Close control valve with dirt eliminating function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150107 |