CN203797068U - Fire fighting non-return valve - Google Patents
Fire fighting non-return valve Download PDFInfo
- Publication number
- CN203797068U CN203797068U CN201420193357.1U CN201420193357U CN203797068U CN 203797068 U CN203797068 U CN 203797068U CN 201420193357 U CN201420193357 U CN 201420193357U CN 203797068 U CN203797068 U CN 203797068U
- Authority
- CN
- China
- Prior art keywords
- valve
- valve shaft
- crossbeam
- valve body
- torsion spring
- 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
- 238000012856 packing Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
Landscapes
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The utility model relates to a fire fighting non-return valve. A flow passage is arranged on a valve body, a cross beam is arranged on the valve body at the front end of the flow passage in the diametral direction, a valve seat is fixed in the back side of the cross beam and in the position of the back side of the cross beam, first upper and lower threaded holes and second upper and lower threaded holes are formed in the valve body behind the cross beam, the upper end of the first valve shaft is inserted into the first upper threaded hole, the lower end of the first valve shaft is inserted into the first lower threaded hole, the upper end of the second valve shaft is inserted into the second upper threaded hole, the lower end of the second valve shaft is inserted into the second lower threaded hole, jackscrews are in bolted connection to the second upper and lower threaded holes, two valve clacks are rotationally mounted on the first valve shaft, the valve clacks are matched with the valve seat, a torsion spring is mounted on the first valve shaft, the first tail end of the torsion spring props against the valve clack, and the second tail end of the torsion spring is fixed on the second valve shaft. The fire fighting non-return valve provided by the utility model has the advantages of long service life, high safety, high reliability, simple structure, low cost and the like, and can effectively prevent a vehicle-mounted pump from being damaged due to medium back flow during a fire extinguishing process.
Description
Technical field
The utility model relates to a kind of valving, especially a kind of fire-fighting check valve.
Background technique
Along with the progress in epoch, the development in city, increasing high buildings and large mansions, day by day various, fire-fighting truck is particularly important.And require more and more higher for fire-fighting vehicle-mounted pump check valve; not only for the quality of safety check, and also more and more for the function of safety check, and this safety check is to use the function that plays non-return effect on fire-fighting vehicle-mounted pump; prevent the refluence of medium, protection Vehicle loaded pump is not damaged.
Safety check in the market can not be realized large flow, and sealing load cannot be realized PN3.0mpa, and cannot seal after using a period of time, damages Vehicle loaded pump, generation accident.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of long service life is provided, safe and reliable, simple in structure, cost is low and can prevent the fire-fighting check valve due to medium refluence damage Vehicle loaded pump in the process of fire extinguishing.
The technological scheme providing according to the utility model, described fire-fighting check valve, comprise valve body, valve seat, jackscrew, the first valve shaft, the second valve shaft, torsion spring, flap and crossbeam, on valve body, be provided with runner, in the diametric(al) of the valve body of runner front position, be provided with crossbeam, on the valve body of the back side of crossbeam and the back position of crossbeam, be fixed with valve seat, on the valve body at crossbeam rear, offer the first upper screwed hole, the second upper screwed hole, first time tapped hole and second time tapped hole, the upper end of described the first valve shaft is inserted in the first upper screwed hole, the lower end of the first valve shaft is inserted in first time tapped hole, the upper end of described the second valve shaft is inserted in the second upper screwed hole, the lower end of the second valve shaft is inserted in second time tapped hole, at the first upper screwed hole, the second upper screwed hole, in first time tapped hole and second time tapped hole, be all bolted with jackscrew, jackscrew is located described the first valve shaft and the second valve shaft in valve body, on the first valve shaft, be rotatablely equipped with two flaps, flap coordinates with described valve seat, on the first valve shaft, torsion spring is installed, the first end and the flap of torsion spring offset, the second end of torsion spring is fixed on the second valve shaft.
On the valve shaft between two flaps, be provided with packing ring.
Described crossbeam is width and increases gradually setting in direction from front to back.The shape of cross section of described crossbeam is isosceles trapezoid, and the front end width of crossbeam is 3% ~ 6% of valve body outside diameter, and the rear end width of crossbeam is 7% ~ 12% of valve body outside diameter.
The utlity model has long service life, safe and reliable, simple in structure and low cost and other advantages, the utility model can prevent from damaging Vehicle loaded pump because medium flows backwards effectively in the process of fire extinguishing.
Brief description of the drawings
Fig. 1 is plan view of the present utility model.
Fig. 2 is rear view of the present utility model.
Fig. 3 is the A-A sectional view of Fig. 1.
Fig. 4 is the B-B sectional view of Fig. 1.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in further detail.
This fire-fighting check valve, comprise valve body 1, valve seat 2, jackscrew 3, the first valve shaft 4, the second valve shaft 5, torsion spring 6, flap 7 and crossbeam 8, on valve body 1, be provided with runner, in the diametric(al) of the valve body 1 of runner front position, be provided with crossbeam 8, on the valve body 1 of the back side of crossbeam 8 and the back position of crossbeam 8, be fixed with valve seat 2, on the valve body 1 at crossbeam 8 rears, offer the first upper screwed hole, the second upper screwed hole, first time tapped hole and second time tapped hole, the upper end of described the first valve shaft 4 is inserted in the first upper screwed hole, the lower end of the first valve shaft 4 is inserted in first time tapped hole, the upper end of described the second valve shaft 5 is inserted in the second upper screwed hole, the lower end of the second valve shaft 5 is inserted in second time tapped hole, at the first upper screwed hole, the second upper screwed hole, in first time tapped hole and second time tapped hole, be all bolted with jackscrew 3, jackscrew 3 by described the first valve shaft 4 and the second valve shaft 5 in the interior location of valve body 1, on the first valve shaft 4, be rotatablely equipped with two flaps 7, flap 7 coordinates with described valve seat 2, on the first valve shaft 4, torsion spring 6 is installed, the first end and the flap 7 of torsion spring 6 offset, the second end of torsion spring 6 is fixed on the second valve shaft 5.
On the valve shaft 4 between two flaps 7, be provided with packing ring 9.
Described crossbeam 8 is width and increases gradually setting in direction from front to back.The shape of cross section of described crossbeam 8 is isosceles trapezoid, and the front end width of crossbeam 8 (being the upper base hem width degree of isosceles trapezoid) for valve body 1 outside diameter 3% ~ 6%, the rear end width (being the bottom width of isosceles trapezoid) of crossbeam 8 for valve body 1 outside diameter 7% ~ 12%.
The first valve shaft 4, the second valve shaft 5 and the valve body 1 of this safety check is fixing by jackscrew 3 location separately.The first end of tetrafluoro packing ring 9 and torsion spring 6 is contained on the first valve shaft 4, and the second end of torsion spring 6 is fixed on the second valve shaft 5.
Flap 7 is located by connecting by the first valve shaft 4.Flap 7 and the natural linear sealing of valve seat 2 (spring 5 elastic force make medium following current need pressure just can make it work), valve seat 2 is formed by sulfuration process by rubber on the valve body 1 of the back side of crossbeam 8 and the back position of crossbeam 8, makes it more superior working life.
Working principle of the present utility model is as follows:
This is that a kind of medium that relies on itself flows and the device of automatic open and close flap 7, the safety check that flap 7 rotates around the valve shaft 4 in valve body 1.When medium following current, flap 7 is impacted by medium and the elastic force rotation that overcomes torsion spring 5 is opened, and medium is negotiable.When medium counter flow, flap 7 impacted by medium and valve seat 2 seals, and medium is non-negotiable.
Claims (4)
1. a fire-fighting check valve, comprise valve body (1), valve seat (2), jackscrew (3), the first valve shaft (4), the second valve shaft (5), torsion spring (6), flap (7) and crossbeam (8), on valve body (1), be provided with runner, in the diametric(al) of the valve body (1) of runner front position, be provided with crossbeam (8), on the valve body (1) of the back side of crossbeam (8) and the back position of crossbeam (8), be fixed with valve seat (2), it is characterized in that: on the valve body (1) at crossbeam (8) rear, offer the first upper screwed hole, the second upper screwed hole, first time tapped hole and second time tapped hole, the upper end of described the first valve shaft (4) is inserted in the first upper screwed hole, the lower end of the first valve shaft (4) is inserted in first time tapped hole, the upper end of described the second valve shaft (5) is inserted in the second upper screwed hole, the lower end of the second valve shaft (5) is inserted in second time tapped hole, at the first upper screwed hole, the second upper screwed hole, in first time tapped hole and second time tapped hole, be all bolted with jackscrew (3), jackscrew (3) is located described the first valve shaft (4) and the second valve shaft (5) in valve body (1), on the first valve shaft (4), be rotatablely equipped with two flaps (7), flap (7) coordinates with described valve seat (2), torsion spring (6) is installed on the first valve shaft (4), the first end of torsion spring (6) and flap (7) offset, the second end of torsion spring (6) is fixed on the second valve shaft (5).
2. fire-fighting check valve as claimed in claim 1, is characterized in that: on the valve shaft (4) between two flaps (7), be provided with packing ring (9).
3. fire-fighting check valve as claimed in claim 1, is characterized in that: described crossbeam (8) is width and increases gradually setting in direction from front to back.
4. fire-fighting check valve as claimed in claim 3, it is characterized in that: the shape of cross section of described crossbeam (8) is isosceles trapezoid, and the front end width of crossbeam (8) (being the upper base hem width degree of isosceles trapezoid) for valve body (1) outside diameter 3% ~ 6%, the rear end width (being the bottom width of isosceles trapezoid) of crossbeam (8) for valve body (1) outside diameter 7% ~ 12%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420193357.1U CN203797068U (en) | 2014-04-18 | 2014-04-18 | Fire fighting non-return valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420193357.1U CN203797068U (en) | 2014-04-18 | 2014-04-18 | Fire fighting non-return valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203797068U true CN203797068U (en) | 2014-08-27 |
Family
ID=51379279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420193357.1U Expired - Lifetime CN203797068U (en) | 2014-04-18 | 2014-04-18 | Fire fighting non-return valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203797068U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107126621A (en) * | 2017-03-30 | 2017-09-05 | 史源 | Magnetic connector for pipeline |
| CN108223851A (en) * | 2018-02-27 | 2018-06-29 | 温州威蓝阀门有限公司 | A kind of locating piece for check-valves |
-
2014
- 2014-04-18 CN CN201420193357.1U patent/CN203797068U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107126621A (en) * | 2017-03-30 | 2017-09-05 | 史源 | Magnetic connector for pipeline |
| CN108223851A (en) * | 2018-02-27 | 2018-06-29 | 温州威蓝阀门有限公司 | A kind of locating piece for check-valves |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103911975B (en) | Movable dam | |
| CN203797068U (en) | Fire fighting non-return valve | |
| CN204025786U (en) | A kind of full-bore energy saving check valve | |
| CN204112288U (en) | Movable dam | |
| CN108374452A (en) | Fire hydrant connection terminal | |
| CN103470218A (en) | Novel low-pressure triggering pressure lever instability shut-off valve | |
| CN206145149U (en) | Hydraulic control slow -closure butterfly check valve | |
| CN101985990B (en) | Metal bidirectional sealing valve cavity safety relief device | |
| CN103388692B (en) | Gas pipeline safety check | |
| CN203131130U (en) | Check valve | |
| CN201836479U (en) | Safety relief device of metal two-way sealing valve cavity | |
| CN103925396A (en) | Full-bore energy-saving check valve | |
| CN101985982B (en) | Heavy-caliber gate valve | |
| CN204300440U (en) | Super-pressure hydraulic control check valve | |
| CN203176631U (en) | Pipeline rapid plugging device | |
| CN206608581U (en) | A kind of novel medium pipe line check valve | |
| CN204690839U (en) | Outdoor fire fighting gun platform bolt | |
| CN202148877U (en) | Pressure limiting device | |
| CN203670923U (en) | Check fire valve | |
| CN202691177U (en) | Y-typed quick closing check valve | |
| CN204592318U (en) | Fire control stop valve | |
| CN102588624B (en) | Double-petal type composite gate valve | |
| CN201215203Y (en) | Safety valve of pipeline dredger | |
| CN204717072U (en) | A kind of antifouling separative valves | |
| CN208472847U (en) | Fire hydrant connection terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140827 |
|
| CX01 | Expiry of patent term |