CN205626821U - Non return formula fire hydrant - Google Patents
Non return formula fire hydrant Download PDFInfo
- Publication number
- CN205626821U CN205626821U CN201620352958.1U CN201620352958U CN205626821U CN 205626821 U CN205626821 U CN 205626821U CN 201620352958 U CN201620352958 U CN 201620352958U CN 205626821 U CN205626821 U CN 205626821U
- Authority
- CN
- China
- Prior art keywords
- valve
- flap
- gap
- valve rod
- valve gap
- 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 - Fee Related
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- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The utility model discloses a non return formula fire hydrant, including valve body, valve clack, valve gap, valve rod, valve cap, be equipped with water inlet, delivery port, through -flow mouth in the valve body, through -flow mouthful and the coaxial setting of water inlet, the inherent through -flow mouthful upper portion of valve body is equipped with sealed, valve gap fixed connection is on valve body upper portion, the valve rod vertical stroke is put and is run through the valve gap downwards, the external screw thread and the valve gap lower part threaded connection at middle part, and the lower extreme stretches into in the valve body inner chamber, the valve cap suit is connected on valve gap upper portion on the valve rod, valve gap upper portion is equipped with the annular around the valve rod, form sealed chamber, and sealed intracavity is equipped with sealing filler, the valve clack upper end is equipped with the boss, and the boss center is equipped with axial blind hole, axial blind hole and valve rod lower extreme clearance fit, be equipped with compression spring between valve clack and the valve gap, spring pocket closes at valve rod, valve clack upper end boss surface, and the valve gap bottom surface is supported on compression spring upper end top, and the lower extreme is inconsistent with the valve clack up end, the utility model discloses both can dam, can effectively prevent the medium refluence by the scram again.
Description
Technical field
This utility model relates to a kind of indoor fire-fighting fire hydrant, particularly to a kind of fire hydrant peculiar to vessel.
Background technology
Fire hydrant is a kind of fixed fire fighting device, and Main Function is to control combustible, isolation oxidizer, elimination ignition source.Generally including valve body, flap and for driving flap to do the valve rod moved along a straight line up and down, valve rod bottom connects the flap for matching with the through-flow mouth end face in valve pocket, and valve rod upper end is connected through valve gap with handwheel.Being rotated by handwheel band ovable valve stem, valve rod drives flap to move the most vertically, it is achieved the contact of flap and through-flow mouth end face with separate, it is achieved the switch of valve.But this valve is after unlatching, it is impossible to prevent medium from flowing backwards, function singleness, it is impossible to meet the occasion of needs scram fire hydrant, it is impossible to intercommunication uses, and the scope of application is less.
Summary of the invention
This utility model is for the deficiencies in the prior art, it is provided that one both can be dammed, and can effectively prevent again the non-return fire hydrant that medium flows backwards with scram.
This utility model is achieved through the following technical solutions technical goal.
Non-return fire hydrant, including valve body, flap, valve gap, valve rod, bonnet；Water inlet, outlet and connection water inlet, the through-flow mouth of outlet it is provided with in described valve body；Described through-flow mouth is coaxially disposed with water inlet, and valve body is provided with sealing surface on the top of through-flow mouth；Described valve gap is fixedly connected on valve body top；Described valve rod is vertically arranged, and downward through valve gap, the external screw thread at middle part is threadeded with bonnet lower, and lower end is stretched in body cavity；Described bonnet is sleeved on valve rod, is connected to valve gap top；Described valve gap top, at the annular groove that is formed around of valve rod, forms annular seal space, is provided with airtight and watertight padding, gland in annular seal space；It thes improvement is that: described flap upper end is provided with boss, and boss center is provided with axial blind hole, and axial blind hole coordinates with valve rod lower gap；It is provided with compression spring between described flap and valve gap；Described compression spring is linked in valve rod, the outer surface of flap upper end boss, the bottom surface of compression spring upper end contact valve gap, and lower end is inconsistent with flap upper surface.
In said structure, described flap baseplane is provided with annular groove, is provided with ring packing sheet in annular groove；Described ring packing sheet passes through pressing plate and nut check, and the end face of ring packing sheet fits tightly formation sealing with the sealing surface on through-flow mouth top；
In said structure, the end that described valve rod matches with the flap upper end central axial blind hole of boss is hemisphere jut shape.
This utility model compared with prior art, has the positive effect that:
1, compression spring it is provided with between flap and valve gap, the stem exterior surface that compression spring is linked in, the bottom surface of upper end contact valve gap, lower end is inconsistent with flap upper surface, this utility model is made to have down the function preventing medium from flowing backwards, rely on when pipeline has pressure the pressure of fluid self to open flap by force, rely on when pipeline decompression spring force to close flap；The rotation utilizing handwheel can ensure that valve is in the state of being turned on and off, and possesses all functions of common fire valve.So that this utility model both can dam, can effectively prevent medium from flowing backwards with scram again.
2, the ring packing sheet end face on this utility model flap and through-flow mouth upper end sealing surface fit tightly the plane sealing structure good airproof performance of formation, and between sealing surface, frictional force is little, and service life is long, and simple in construction is easy to process, and anufacturability is good, it is simple to maintenance.
3, the end that valve rod matches with the flap upper end central axial blind hole of boss is hemisphere jut shape, make valve rod form point cantact between the two with flap to be connected, eliminate the Form and position error impact on sealing surface, strengthen the sealing of ring packing sheet end face and through-flow mouth upper end sealing surface.
Accompanying drawing explanation
Fig. 1 is this utility model structural representation.
Fig. 2 is I enlarged drawing in Fig. 1.
Detailed description of the invention
Below according to accompanying drawing and the utility model is described in further detail in conjunction with the embodiments.
Non-return fire hydrant shown in the drawings, including valve body 1, flap 3, valve gap 6, valve rod 7, bonnet 9；Water inlet 2, outlet 12 and connection water inlet 2, the through-flow mouth 17 of outlet 12 it is provided with in valve body 1；Through-flow mouth 17 is coaxially disposed with water inlet 2, and valve body 1 is provided with sealing surface 14 on the top of through-flow mouth 17；Valve gap 6 is fixedly connected on valve body 1 top；Valve rod 7 is vertically arranged, and downward through valve gap 6, the external screw thread at middle part is connected with valve gap 6 lower thread, and lower end is stretched in valve body 1 inner chamber；Bonnet 9 is sleeved on valve rod 7, is connected to valve gap 6 top；Valve gap 6 top, at the annular groove that is formed around of valve rod 7, forms annular seal space, is provided with airtight and watertight padding 11, gland 10 in annular seal space；Flap 3 upper end is provided with boss, and boss center is provided with axial blind hole 20, and axial blind hole 20 coordinates with valve rod 7 lower gap；Compression spring 19 it is provided with between flap 3 and valve gap 6；Compression spring 19 is linked in valve rod 7, the outer surface of flap 3 upper end boss, the bottom surface of compression spring 19 upper end contact valve gap 6, and lower end is inconsistent with flap 3 upper surface.
Flap 3 baseplane is provided with annular groove, is provided with ring packing sheet 13 in annular groove；Ring packing sheet 13 is locked by pressing plate 15 and nut 16, and the end face of ring packing sheet 13 fits tightly formation sealing with the sealing surface 14 on through-flow mouth 17 top；
The end that valve rod 7 matches with the flap 3 upper end central axial blind hole of boss 20 is hemisphere jut shape.
The concrete embodiment dammed: rotate clockwise handwheel 8, valve rod 7 lower end moves downward in axial blind hole 20, compresses flap 3 and is close to the sealing surface 14 on through-flow mouth 17 top, so that through-flow mouth 17 is closed, even if pipe medium pressure exists, valve is always in current floe condition.
Prevent the concrete embodiment that medium flows backwards: rotate counterclockwise handwheel 8, valve rod 7 is made to increase, owing to the effect flap 3 of compression spring 19 is adjacent to sealing surface 14 all the time, valve is in sealing state, when pipeline discharge pressure medium, pressure medium acts on the bottom surface of flap 3 and overcomes compression spring 19 active force, and flap 3 moves upward along valve rod 7, valve opening；When pipeline rapid decompression, flap 3, under compression spring 19 acts on, is affixed to rapidly the sealing surface 14 on through-flow mouth 17 top, thus prevents medium back flow.
Claims (3)
1. a non-return fire hydrant, including valve body (1), flap (3), valve gap (6), valve rod (7), bonnet (9)；Water inlet (2), outlet (12) and connection water inlet (2), the through-flow mouth (17) of outlet (12) it is provided with in described valve body (1)；Described through-flow mouth (17) is coaxially disposed with water inlet (2), and valve body (1) is provided with sealing surface (14) on the top of through-flow mouth (17)；Described valve gap (6) is fixedly connected on valve body (1) top；Described valve rod (7) is vertically arranged, and downward through valve gap (6), the external screw thread at middle part is connected with valve gap (6) lower thread, and lower end is stretched in valve body (1) inner chamber；Described bonnet (9) is sleeved on valve rod (7), is connected to valve gap (6) top；Described valve gap (6) top, at the annular groove that is formed around of valve rod (7), forms annular seal space, is provided with airtight and watertight padding (11), gland (10) in annular seal space；It is characterized in that: described flap (3) upper end is provided with boss, boss center is provided with axial blind hole (20), and axial blind hole (20) coordinates with valve rod (7) lower gap；Compression spring (19) it is provided with between described flap (3) and valve gap (6)；Described compression spring (19) is linked in valve rod (7), the outer surface of flap (3) upper end boss, the bottom surface of compression spring (19) upper end contact valve gap (6), and lower end is inconsistent with flap (3) upper surface.
Non-return fire hydrant the most according to claim 1 is characterized in that: described flap (3) baseplane is provided with annular groove, is provided with ring packing sheet (13) in annular groove；Described ring packing sheet (13) is locked by pressing plate (15) and nut (16), and the end face of ring packing sheet (13) fits tightly formation sealing with the sealing surface (14) on through-flow mouth (17) top.
Non-return fire hydrant the most according to claim 1 and 2 is characterized in that: the end that described valve rod (7) matches with the central axial blind hole of flap (3) upper end boss (20) is hemisphere jut shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620352958.1U CN205626821U (en) | 2016-04-25 | 2016-04-25 | Non return formula fire hydrant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620352958.1U CN205626821U (en) | 2016-04-25 | 2016-04-25 | Non return formula fire hydrant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205626821U true CN205626821U (en) | 2016-10-12 |
Family
ID=57063395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620352958.1U Expired - Fee Related CN205626821U (en) | 2016-04-25 | 2016-04-25 | Non return formula fire hydrant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205626821U (en) |
-
2016
- 2016-04-25 CN CN201620352958.1U patent/CN205626821U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161012 Termination date: 20210425 |