CN203670923U - Check fire valve - Google Patents
Check fire valve Download PDFInfo
- Publication number
- CN203670923U CN203670923U CN201420041199.8U CN201420041199U CN203670923U CN 203670923 U CN203670923 U CN 203670923U CN 201420041199 U CN201420041199 U CN 201420041199U CN 203670923 U CN203670923 U CN 203670923U
- 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.)
- Expired - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 210000004907 gland Anatomy 0.000 claims description 6
- 230000003116 impacting effect Effects 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 3
- 208000002925 dental caries Diseases 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Images
Landscapes
- Check Valves (AREA)
- Details Of Valves (AREA)
Abstract
A check fire valve comprises a valve body, a check valve component, a supporting seat, a valve cover, a valve rod, a compression nut, a hand wheel and nuts, and is characterized in that the check valve component comprises a valve core, a sealing seat, a sealing gasket, a gasket, a sealing ring and a bolt, wherein a check valve seat is arranged on the valve body. The check fire valve has the advantages that no fixed connection is set between the check valve component and the valve rod, and therefore the check fire valve is closed and then prevents backflow pollution caused by backflow of downstream water when downstream pressure exceeds upstream pressure; pressure balance holes are formed in the valve core, and therefore the check fire valve guarantees that opening speed of the check valve component is not high, and prevents the check valve component from being impacted, and life of the check fire valve is prolonged; air holes are formed in the supporting seat, and therefore the effect that closing speed of the check fire valve is not high is guaranteed, impact of a water hammer is prevented, and safety of a pipeline is guaranteed.
Description
Technical field
The utility model relates to a kind of fire valve, particularly a kind of non-return fire valve with check function.
Background technique
At present, in enforcement fire-fighting process, if when 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, in the time that 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 and exceed several times even tens times of normal pressure, can cause breaking of pipeline, and impact is produced and life.
Summary of the invention
The purpose of this utility model is the problems referred to above that exist for existing fire valve, provides a kind of and can control flow, can prevent aqueous reflux in pipe racks, can slacken water hammer, prevents from destroying the non-return fire valve of pipeline.
The utility model 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, on described 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.
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, be fixed with nut.
Compared with prior art, the utility model has the advantage of: between check valve assembly and valve rod, be not fixedly connected with, in the time that downstream pressure exceedes 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 utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the utility model.
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.On described supporting base 3, be provided with vent 31, 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, be fixed with nut 8.
Before assembling the utility model, 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 utility model 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 chamber 41 in the middle of 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 chamber 42 in the middle of 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; due to the existence of the chamber 42 interior air in the middle of valve gap 4 bottoms; the speed that check valve assembly 2 declines that slowed down, 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: on described 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.
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, be fixed with nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420041199.8U CN203670923U (en) | 2014-01-23 | 2014-01-23 | Check fire valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420041199.8U CN203670923U (en) | 2014-01-23 | 2014-01-23 | Check fire valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203670923U true CN203670923U (en) | 2014-06-25 |
Family
ID=50967220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420041199.8U Expired - Lifetime CN203670923U (en) | 2014-01-23 | 2014-01-23 | Check fire valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203670923U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103697199A (en) * | 2014-01-23 | 2014-04-02 | 宁波华成阀门有限公司 | Check fire-fighting valve |
-
2014
- 2014-01-23 CN CN201420041199.8U patent/CN203670923U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103697199A (en) * | 2014-01-23 | 2014-04-02 | 宁波华成阀门有限公司 | Check fire-fighting valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204371648U (en) | A kind of multi-functional water hammer stops valve in advance | |
| WO2008024764A3 (en) | Method and apparatus for reducing the precipitation rate of an irrigation sprinkler | |
| KR20160072556A (en) | Stopper Check Valve | |
| CN206530745U (en) | A kind of anti-interference spring loaded safety valve of large-scale irrigation water delivery pipe network noresidue damping erosion control | |
| CN201650709U (en) | Hydraulic control valve | |
| CN203131130U (en) | Check valve | |
| KR101356119B1 (en) | Hunting pressure relief valve | |
| CN203670923U (en) | Check fire valve | |
| CN103047457A (en) | Water hammer discharge valve | |
| CN204062108U (en) | Hydroturbine water intake main valve protective gear | |
| CN104405936A (en) | Low-resistance decompression type backflow prevention device | |
| NZ745548A (en) | Spill-resistant vacuum breaker valve | |
| CN103697199A (en) | Check fire-fighting valve | |
| CN210164915U (en) | Small and medium drift diameter lifting type water hammer prevention stop valve | |
| CN204267810U (en) | A kind of diaphragm water hammer-resistant preaction valve | |
| CN203940107U (en) | A kind of gas-liquid separator valve with warning function | |
| RU2521531C1 (en) | Device for protection of pipeline | |
| CN105805365A (en) | Pressure reduction type backflow preventing device | |
| CN104265959A (en) | Novel check valve | |
| CN203717324U (en) | High pressure water pump station valve | |
| RU2626191C1 (en) | Hydromechanical device to smoothly load hydraulic system | |
| CN209084080U (en) | Check-valves for vacuum pump | |
| CN202451900U (en) | Right-angle quick closing check valve | |
| CN207796122U (en) | Liquid inlet and outlet valve for plunger pump, plunger pump and boiler | |
| CN105020442A (en) | Y-shaped high-pressure hard self-sealing check valve with bypass and piping |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140625 |
|
| CX01 | Expiry of patent term |