CN103697199A - Check fire-fighting valve - Google Patents
Check fire-fighting valve Download PDFInfo
- Publication number
- CN103697199A CN103697199A CN201410030223.2A CN201410030223A CN103697199A CN 103697199 A CN103697199 A CN 103697199A CN 201410030223 A CN201410030223 A CN 201410030223A CN 103697199 A CN103697199 A CN 103697199A
- Authority
- CN
- China
- Prior art keywords
- valve
- check
- supporting base
- check valve
- spool
- 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
Links
Images
Classifications
-
- 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
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
- F16K15/182—Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism
- F16K15/1826—Check valves which can be actuated by a pilot valve
-
- 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
- F16K47/023—Means in valves for absorbing fluid energy for preventing water-hammer or noise for preventing water-hammer, e.g. damping of the valve movement
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
Abstract
The invention discloses a check fire-fighting valve. The check fire-fighting valve comprises a valve body, a check valve component, a bearing seat, a valve cover, a valve rod, a pressing nut, a hand wheel and a nut. The check fire-fighting valve is characterized in that the check valve component comprises a valve core, a sealing seat, a sealing pad, a gasket, a sealing ring and a bolt; and a valve seat of the check valve is arranged on the valve body. The check fire-fighting valve disclosed by the invention has the advantages that the check valve component and the valve rod are not fixedly connected, when the downstream pressure is higher than the upstream pressure, the valve is closed so as to prevent downstream water from backflowing and causing backflow pollution; the valve core is provided with a pressure balance hole so as to ensure that the speed of the check valve component is not too fast when being opened, prevent the impacting of the check valve component and prolong the service life of the valve; the bearing seat is provided with a ventilating hole so as to ensure that the speed of the valve is not too fast when being closed, prevent a water hammer from impacting and protect the safety of a pipeline.
Description
Technical field
The present invention relates to a kind of fire valve, particularly a kind of non-return fire valve with check function.
Background technique
At present, in implementing fire-fighting process, when if the water of water-main net is under-supply, may use the nonpotable water such as pond, river course puts out a fire, common fire valve, owing to not being with check device, when fire extinguishing finishes, water in pipe racks may flow backwards in water-main net, and causing flows backwards pollutes.In addition, fire valve of the prior art, usually, because of processes such as turn on pump, termination of pumping, switch valves, changes suddenly the flow velocity of water, thereby causes the alternately variation that pressure sharply raises and reduces, and causes the generation of impacting flap and water hammer.Impact the working life that flap can reduce valve; Water hammer has great destructiveness, and in pipeline, pressure can sharply increase to several times even tens times over normal pressure, can cause breaking of pipeline, and impact is produced and life.
Summary of the invention
The object of the invention is the problems referred to above that exist for existing fire valve, provide a kind of and can control flow, can prevent aqueous reflux in pipe racks, can slacken water hammer, prevent from destroying the non-return fire valve of pipeline.
The present invention solves the problems of the technologies described above and the technological scheme that adopts is: a kind of non-return fire valve, comprise valve body, check valve assembly, supporting base, valve gap, valve rod, gland nut, handwheel and nut, it is characterized in that: described check valve assembly comprises spool, sealing seat, sealing gasket, pad, seal ring and bolt, and check valve receptacle is arranged on valve body.
As improvement, described supporting base is threaded on valve body, is provided with O type circle between supporting base and valve body, in the middle of supporting base, has cavity, and check valve assembly can move up and down in supporting base cavity, is provided with O type circle between spool and supporting base.
As improvement, described valve gap is threaded on supporting base, in the middle of bonnet lower, is provided with cavity, and check valve assembly can move up and down in valve gap cavity, is provided with O type circle between spool and valve gap, and spool is divided into upper and lower two chambers cavity.
As improvement, on described spool, be provided with pressure compensation opening, the speed while guaranteeing valve open can be too not fast, prevents from impacting check valve assembly, increases life of valve.
As improvement, described stopping in bearing is provided with vent, and the speed while guaranteeing valve closing can be too not fast, prevents impact of water hammer, protection pipeline safety.
As improvement, described threaded stem is connected on valve gap, and fixes with gland nut, and valve rod upper end is connected with handwheel, adjusting handle, and valve rod can move up and down, and while can control valve opening, the size of flow, is provided with O type circle between valve rod and valve gap.
As improvement, between described handwheel and valve rod, with nut, be fixed.
Compared with prior art, the invention has the advantages that: between check valve assembly and valve rod, be not fixedly connected with, when downstream pressure surpasses upstream pressure, valve closing, preventing after valve that aqueous reflux causes to flow backwards pollutes; On spool, be provided with pressure compensation opening, guarantee that speed when check valve assembly is opened can be too not fast, prevent from impacting check valve assembly, increase life of valve; On supporting base, be provided with vent, the speed while guaranteeing valve closing can be too not fast, prevents impact of water hammer, protection pipeline safety.
Accompanying drawing explanation
Fig. 1 is structure sectional view of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the present invention.
A kind of non-return fire valve as described in Figure 1, comprise valve body 1, check valve assembly 2, supporting base 3, valve gap 4, valve rod 5, gland nut 6, handwheel 7 and nut 8, it is characterized in that: described check valve assembly 2 comprises spool 21, sealing seat 22, sealing gasket 23, pad 24, seal ring 25 and bolt 26, and check valve receptacle 11 is arranged on valve body.Described supporting base 3 is threaded on valve body 1, is provided with O type circle 9 between supporting base 3 and valve body 1, in the middle of supporting base 3, has cavity, and check valve assembly 2 can move up and down in supporting base 3 cavitys, is provided with O type circle 10 between spool 21 and supporting base 3.Described valve gap 4 is threaded on supporting base 3, and valve gap is provided with cavity in the middle of 4 bottoms, and check valve assembly 2 can move up and down in valve gap 4 cavitys, is provided with O type circle 15 between spool 21 and valve gap 4, and spool 21 is divided into upper and lower two chambers 41 and 42 cavity.On described spool 21, be provided with pressure compensation opening 211, the speed while guaranteeing valve open can be too not fast, increases life of valve.Described stopping in bearing 3 is provided with vent 31, and the speed while guaranteeing valve closing can be too not fast, prevents impact of water hammer.Described valve rod 5 is threaded on valve gap 4, and fixing with gland nut 6, and valve rod 5 upper ends are connected with handwheel 7, adjusting handle 7, and valve rod 5 can move up and down, and while can control valve opening, the size of flow, is provided with O type circle 16 between valve rod 5 and valve gap 4.Between described handwheel 7 and valve rod 5, with nut 8, be fixed.
Before assembling the present invention, should first clean each part, must not have any impurity to bring in valve body 1, need the air tightness test through 0.6Mpa before coming into operation, pressurize just can normally be used without any leakage after 15 seconds.
Working principle of the present invention is further described:
When valve water inlet and water flow pressure are when normal, under the effect of hydraulic pressure, overcome the gravity of check valve assembly 2 self, check valve assembly 2 moves up, valve open, a part of current enter in the middle chamber 41 in valve gap 4 bottoms by pressure compensation opening 211 simultaneously, have reduced the speed that check valve assembly 2 rises, prevent check valve assembly 2 to produce and impact, have in addition air to enter in the middle chamber 42 in valve gap 4 bottoms by the vent 31 on supporting base 3.When valve cut off the water or valve after pressure during higher than upstream pressure; check valve assembly 2 moves down; sealing gasket 23 contacts with check valve receptacle 11; valve closing, prevents that the refluence of water causes pollution after valve, in addition; existence due to the chamber 42 interior air in the middle of valve gap 4 bottoms; the speed that the check valve assembly 2 that slowed down declines, prevents impact of water hammer effectively, protection pipeline safety.
Claims (7)
1. a non-return fire valve, comprise valve body, check valve assembly, supporting base, valve gap, valve rod, gland nut, handwheel and nut, it is characterized in that: described check valve assembly comprises spool, sealing seat, sealing gasket, pad, seal ring and bolt, and check valve receptacle is arranged on valve body.
2. non-return fire valve according to claim 1, it is characterized in that: described supporting base is threaded on valve body, between supporting base and valve body, be provided with O type circle, in the middle of supporting base, there is cavity, check valve assembly can move up and down in supporting base cavity, is provided with O type circle between spool and supporting base.
3. non-return fire valve according to claim 1, it is characterized in that: described valve gap is threaded on supporting base, between valve gap and supporting base, be provided with O type circle, in the middle of bonnet lower, be provided with cavity, check valve assembly can move up and down in valve gap cavity, between spool and valve gap, be provided with O type circle, spool is divided into upper and lower two chambers cavity.
4. non-return fire valve according to claim 1, is characterized in that: on described spool, be provided with pressure compensation opening, the speed while guaranteeing valve open can be too not fast, prevents from impacting check valve assembly, increases life of valve.
5. non-return fire valve according to claim 1, is characterized in that: described stopping in bearing is provided with vent, and the speed while guaranteeing valve closing can be too not fast, prevents impact of water hammer, protection pipeline safety.
6. non-return fire valve according to claim 1, it is characterized in that: described threaded stem is connected on valve gap, and fix with gland nut, valve rod upper end is connected with handwheel, adjusting handle, valve rod can move up and down, and while can control valve opening, the size of flow, is provided with O type circle between valve rod and valve gap.
7. non-return fire valve according to claim 1, is characterized in that: between described handwheel and valve rod, with nut, be fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410030223.2A CN103697199A (en) | 2014-01-23 | 2014-01-23 | Check fire-fighting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410030223.2A CN103697199A (en) | 2014-01-23 | 2014-01-23 | Check fire-fighting valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103697199A true CN103697199A (en) | 2014-04-02 |
Family
ID=50358829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410030223.2A Pending CN103697199A (en) | 2014-01-23 | 2014-01-23 | Check fire-fighting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103697199A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265958A (en) * | 2014-04-21 | 2015-01-07 | 株式会社产经技研 | Stop Valve Structure |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2054129U (en) * | 1989-06-19 | 1990-03-07 | 杨玉思 | Noiseless check valve |
| CN2141003Y (en) * | 1992-05-27 | 1993-08-25 | 徐正喜 | Slow-cuting-off check valve |
| JPH0932942A (en) * | 1995-07-18 | 1997-02-07 | F M Valve Seisakusho:Kk | Check valve device |
| CN2584967Y (en) * | 2002-11-22 | 2003-11-05 | 宁波法兰特阀门有限公司 | Stop, check two-use valve |
| CN201071937Y (en) * | 2007-07-19 | 2008-06-11 | 武汉阳逻机电设备修造有限公司 | Balance type pneumatic break valve |
| CN201170332Y (en) * | 2008-04-02 | 2008-12-24 | 蓬莱金创集团公司 | Valve |
| CN201715046U (en) * | 2010-04-30 | 2011-01-19 | 营口流体设备制造(集团)有限公司 | High-pressure water scale removal balance check valve |
| KR20140001617A (en) * | 2012-06-28 | 2014-01-07 | 손형모 | Check valve |
| CN203670923U (en) * | 2014-01-23 | 2014-06-25 | 宁波华成阀门有限公司 | Check fire valve |
-
2014
- 2014-01-23 CN CN201410030223.2A patent/CN103697199A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2054129U (en) * | 1989-06-19 | 1990-03-07 | 杨玉思 | Noiseless check valve |
| CN2141003Y (en) * | 1992-05-27 | 1993-08-25 | 徐正喜 | Slow-cuting-off check valve |
| JPH0932942A (en) * | 1995-07-18 | 1997-02-07 | F M Valve Seisakusho:Kk | Check valve device |
| CN2584967Y (en) * | 2002-11-22 | 2003-11-05 | 宁波法兰特阀门有限公司 | Stop, check two-use valve |
| CN201071937Y (en) * | 2007-07-19 | 2008-06-11 | 武汉阳逻机电设备修造有限公司 | Balance type pneumatic break valve |
| CN201170332Y (en) * | 2008-04-02 | 2008-12-24 | 蓬莱金创集团公司 | Valve |
| CN201715046U (en) * | 2010-04-30 | 2011-01-19 | 营口流体设备制造(集团)有限公司 | High-pressure water scale removal balance check valve |
| KR20140001617A (en) * | 2012-06-28 | 2014-01-07 | 손형모 | Check valve |
| CN203670923U (en) * | 2014-01-23 | 2014-06-25 | 宁波华成阀门有限公司 | Check fire valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265958A (en) * | 2014-04-21 | 2015-01-07 | 株式会社产经技研 | Stop Valve Structure |
| US9541209B2 (en) | 2014-04-21 | 2017-01-10 | Sankei Giken Co., Ltd. | Structure of check valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101731955B1 (en) | Stopper Check Valve | |
| CA2901751C (en) | Main valve with internal rigid structure | |
| MX2017006939A (en) | Erosion resistant gas lift valve assemblies with fluid flow barriers and methods of assembling same. | |
| KR101356119B1 (en) | Hunting pressure relief valve | |
| CN103759069A (en) | Cavitation prevention large pressure difference adjustable pressure reducing valve | |
| EA031610B1 (en) | High integrity pressure protecting system (hipps) for a fluid line | |
| CN105822802B (en) | Modified self-sealing function regulating valve | |
| CN204062108U (en) | Hydroturbine water intake main valve protective gear | |
| CN203670923U (en) | Check fire valve | |
| CN103697199A (en) | Check fire-fighting valve | |
| CN203131130U (en) | Check valve | |
| CN204267810U (en) | A kind of diaphragm water hammer-resistant preaction valve | |
| NZ745548A (en) | Spill-resistant vacuum breaker valve | |
| CN203115195U (en) | Clack film check valve | |
| CN202144887U (en) | Ball check valve | |
| RU2626191C1 (en) | Hydromechanical device to smoothly load hydraulic system | |
| CN104713230A (en) | Water control device of heat pump water heater | |
| CN210164915U (en) | Small and medium drift diameter lifting type water hammer prevention stop valve | |
| CN205207786U (en) | Silence noise -eliminated check valve | |
| CN203717324U (en) | High pressure water pump station valve | |
| CN209084080U (en) | Check-valves for vacuum pump | |
| KR200478874Y1 (en) | Structure of check valve | |
| CN105805365A (en) | Pressure reduction type backflow preventing device | |
| CN103526804B (en) | Auto-pneumatic cylinder crosses water gas stoper | |
| CN107339471B (en) | Diaphragm buffer type rubber flap check valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140402 |
|
| RJ01 | Rejection of invention patent application after publication |