CN205978671U - Decompression type hangs down resistance backflow preventer - Google Patents
Decompression type hangs down resistance backflow preventer Download PDFInfo
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- CN205978671U CN205978671U CN201620891362.9U CN201620891362U CN205978671U CN 205978671 U CN205978671 U CN 205978671U CN 201620891362 U CN201620891362 U CN 201620891362U CN 205978671 U CN205978671 U CN 205978671U
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- valve
- valves
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- check
- outlet
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Abstract
The utility model relates to a decompression type hangs down resistance backflow preventer, including valve body, import check valve, outlet non -return valve, the left water inlet of valve body department for the import check valve, be equipped with imported check valve valve clack in this import check valve, the centre of this import check valve valve clack is equipped with imported check valve valve rod, is equipped with imported check -valve spring on the import check valve valve rod, import check valve valve rod overlaps with the linking outer wall department of import check valve valve clack has a O type sealing washer, it is connected to screw to fix to import the check valve valve clack and import the check valve valve rod through hexagon nut, the delivery port department on valve body right side for outlet non -return valve, outlet non -return valve is inside to have outlet non -return valve valve rod and outlet non -return valve spring, is equipped with the outlet non -return valve spring on the outlet non -return valve valve rod, outlet non -return valve valve clack and middle the 2nd O type sealing washer of installing of jump ring retaining ring, the utility model has the advantages of simple structure, shared space is little, and the installation is simple, easy maintenance, convenient operation.
Description
Technical field
This utility model belongs to valve body technical field, more particularly, to a kind of pressure-reducing low resistance force counter flow stop.
Background technology
A kind of pressure-reducing low resistance force counter flow stop (antifouling separative valves) is according to current water supply network, especially life drink
With waterpipe because backflow causes the situation of severe contamination, a kind of press water having in restriction pipeline manufacturing and designing can only be unidirectional
The novel hydropower control combination device of flowing.
The aqueous reflux in pipeline can be prevented, prevent due to power failure or water supply network rupture, use the reasons such as water end (W.E.) pressure rise
And the pressure causing flows backwards or phenomenon is flow backwards in siphon.
Content of the invention
The purpose of this utility model is to overcome the shortcomings of that prior art exists, and provides a kind of short valve design, structure
Simply, taken up space little, installed simple, easy to maintenance, water trap is built-in it is not easy to by artificial destruction, easy to operate subtracts
Die mould low resistance force counter flow stop.
The purpose of this utility model to complete by following technical solution, including valve body, water inlet check-valves, water outlet
Mouth check-valves, the water inlet on the left of described valve body is water inlet check-valves, and water inlet check-valves are fixed on water inlet non-return
In valve support, in this water inlet check-valves, be provided with water inlet check-valves flap, the centre of this water inlet check-valves flap be provided with into
Intake check valve valve rod, equipped with water inlet check-valve spring on water inlet check-valves valve rod, water inlet check-valves valve rod and water inlet
It is cased with the first O-ring seal at the linking outer wall of mouthful check-valves flap, be tightened water inlet check-valves valve by hex nut
Lobe is connected with water inlet check-valves valve rod；Water outlet on the right side of described valve body is outlet check-valves, outlet non-return
Valve is fixed in outlet non-return valve support, has outlet check-valves valve rod and outlet check-valves bullet inside outlet check-valves
Spring, outlet check-valves valve rod is provided with outlet check-valve spring, installs in the middle of outlet check-valves flap and jump ring back-up ring
There is the second O-ring seal.
Preferably, being placed with middle mouth packing ring and taper bowl with valve cover chamber at the opening of described valve body, set in taper bowl
Have and be placed with diaphragm in the middle of diaphragm top board and diaphragm lower platen, diaphragm top board and diaphragm lower platen；Valve gap upper left side is installed
There is straight joint, straight joint is connected with copper pipe and passes through rotation under nut tightens fixing linking, and copper pipe connects copper by three way cock
Ball valve；Described valve gap middle setting has drain valve valve rod.
Preferably, described drain valve valve rod connects valve body bottom discharge valve, drain valve stem bottom is by drain valve valve
Lobe is wrapped in centre, is provided with the 3rd O-ring seal, the 4th O-ring seal, drain valve between drain valve valve rod and drain valve flap
Interior sealing pad and draining valve insert lower platen, drain valve valve rod is provided with draining valve spring；Described drain valve bottom sets
There are water draining beak and chock plug.
The beneficial effects of the utility model are：Short valve design, overcoming existing product is by two valve body splicing groups
The structural disadvantages becoming, are modified to integrated molding structure valve, are modified to valve bottom discharge valve embedding structure, do not result in people
Damage drain valve for external force collision；There is structure simple, taken up space little, install simple, easy to maintenance, easy to operate can
Prevent the aqueous reflux in pipeline, prevent due to have a power failure or water supply network rupture, with the former pressure thus resulting in such as water end (W.E.) pressure rise
The advantage that power flows backwards or siphon is flow backwards.
Brief description
Fig. 1 is structural representation of the present utility model.
Label in accompanying drawing is respectively：1st, valve body；2nd, water inlet non-return valve support；3rd, water inlet check-valves flap；4th,
One O-ring seal；5th, water inlet check-valve spring；6th, water inlet check-valves valve rod；7th, hex nut；8th, middle mouth packing ring；9th, valve
Lid；10th, straight joint；11st, nut；12nd, copper pipe；13rd, three way cock；14th, copper ball valve；15th, drain valve valve rod；16th, press on diaphragm
Plate；17th, diaphragm；18th, diaphragm lower platen；19th, taper bowl；20th, outlet non-return valve support；21st, outlet check-valve spring；
22nd, the second O-ring seal；23rd, jump ring back-up ring；24th, drain valve flap；25th, the 4th O-ring seal；26th, under draining valve insert
Pressing plate；27th, draining valve spring；28th, chock plug；29th, water draining beak；30th, drain valve interior sealing pad；31st, the 3rd O-ring seal；32nd, enter
The mouth of a river；33rd, water inlet check-valves；34th, outlet；35th, outlet check-valves；36th, drain valve；37th, outlet check-valves valve rod；
38th, outlet check-valves flap.
Specific embodiment
Below in conjunction with accompanying drawing, this utility model is done with detailed introduction：As shown in Figure 1, this utility model includes valve body
1st, water inlet check-valves 33, outlet check-valves 35, are water inlet check-valves 33 at the described water inlet 32 in valve body 1 left side,
Water inlet check-valves 33 are fixed in water inlet non-return valve support 2, are provided with water inlet check-valves valve in this water inlet check-valves 33
Lobe 3, the centre of this water inlet check-valves flap 3 is provided with water inlet check-valves valve rod 6, equipped with entering on water inlet check-valves valve rod 6
Intake check valve spring 5, it is O-shaped close that being connected at outer wall of water inlet check-valves valve rod 6 and water inlet check-valves flap 3, is cased with first
Seal 4, is connected with water inlet check-valves valve rod 6 by the hex nut 7 water inlet check-valves flap 3 that is tightened；Valve body 1 is left
It is water inlet check-valves 33 at the water inlet 32 of side, when intake pressure is not less than 20KPa, water inlet check-valves 33 lean on medium to act on
On flap, water pressure overcomes spring 5 pretightning force to automatically open up, and medium enters inside valve body 1.
It is outlet check-valves 35 at the described outlet 34 on valve body 1 right side, outlet check-valves 35 are fixed on water outlet
In mouth non-return valve support 20, inside outlet check-valves 35, there are outlet check-valves valve rod 37 and outlet check-valve spring 21,
Outlet check-valves valve rod 37 is provided with outlet check-valve spring 21, in the middle of outlet check-valves flap 38 and jump ring back-up ring 23
Second O-ring seal 22 is installed；It is outlet check-valves 35 at the outlet 34 on valve body 1 right side, because intake pressure is not little
When 20KPa, water inlet check-valves 33 act on water pressure on flap by medium and overcome spring 5 pretightning force to automatically open up, and water enters
Enter inside valve body 1, outlet check-valves act on water pressure on flap by medium and overcome spring 21 pretightning force to automatically open up simultaneously
Outlet check-valves 35 water flows out at the outlet 34 of valve body 1, is in the normal circulation status of medium in valve body.
It is placed with middle mouth packing ring 8 and taper bowl 19 between at the opening of this valve gap 9 and valve body 1, in taper bowl 19, be provided with diaphragm
It is placed with diaphragm 17 in the middle of top board 16 and diaphragm lower platen 18, diaphragm top board 16 and diaphragm lower platen 18；Valve gap 9 upper left side
Straight joint 10 is installed, straight joint 10 is connected with copper pipe 12 and tightens fixing linking by 11 times rotations of nut, and copper pipe 12 passes through
Three way cock 13 connects copper ball valve 14, and valve gap 9 middle setting has drain valve valve rod 15.When intake pressure reaches 20KPa, water inlet stops
Return valve 33 to act on water pressure on flap by medium and overcome spring 5 pretightning force to automatically open up, water enters inside valve body 1, medium head
First pass through straight joint 10 to enter the upper cavity of diaphragm 17 of drain valve 36 with copper pipe 12 and three way cock 13 and produce pressure promotion
Drain valve valve rod 15 pushes closing drain valve 36.
This drain valve valve rod 15 connects valve body 1 bottom discharge valve 36, and drain valve valve rod 15 bottom is wrapped by drain valve flap 24
Wrap up in and centre, between drain valve valve rod 15 and drain valve flap 24, be provided with the 3rd O-ring seal 31, the 4th O-ring seal 25, row
Water valve interior sealing pad 30 and draining valve insert lower platen 26, drain valve valve rod 15 is provided with draining valve spring 27, drain valve
36 bottoms are provided with water draining beak 29 and chock plug 28.When water inlet check-valves 33 and outlet check-valves 35 are closed, it is in valve body no
Flow of media state, when valve body internal gas pressure reaches 0.02mpa pressure, that is, the pressure of water inlet check-valves 33 is less than outlet check-valves
During 35 aqueous reflux pressure, drain valve 36 is opened rapidly by itself initial tension of spring, carries out draining.
The construction featuress of pressure-reducing low resistance force counter flow stop：There are two separate check-valves；There is centre subtract
The independent waterpower differential type drain valve of pressure intracavity one；Overcome aqueous reflux pollution and cause the pollution of domestic water；Have double
Non-return seals, and reliably prevents aqueous reflux；There is drain function, prevent secondary pollution；
Inner body feature：Valve inner part is stainless steel making, hygienic environment-protecting, and intensity is high, and resistance to corrosion is strong；
Valve flap structure is unique, and medium excessively stream frictional resistance is little, improves the low pressure loss under peak flow rate (PFR)；Meanwhile, valve body can not dismantled
In the case of intake-outlet check-valves and drain valve are dismounted, be easy to cleaning and the maintenance of internal valves.
This utility model is not limited to above-mentioned embodiment, no matter making any change on its shape or material are constituted, all
It is using structure design provided by the utility model, be all a kind of deformation of the present utility model, be all considered as new in this practicality
Within type protection domain.
Claims (3)
1. a kind of pressure-reducing low resistance force counter flow stop, including valve body (1), water inlet check-valves (33), outlet check-valves
(35) it is characterised in that：Water inlet (32) place on the left of described valve body (1) is water inlet check-valves (33), water inlet non-return
Valve (33) is fixed on water inlet non-return valve support (2), is provided with water inlet check-valves flap in this water inlet check-valves (33)
(3), the centre of this water inlet check-valves flap (3) is provided with water inlet check-valves valve rod (6), on water inlet check-valves valve rod (6)
Equipped with water inlet check-valve spring (5), water inlet check-valves valve rod (6) is connected at outer wall with water inlet check-valves flap (3)
It is cased with the first O-ring seal (4), be tightened water inlet check-valves flap (3) and water inlet check-valves by hex nut (7)
Valve rod (6) is connected；Outlet (34) place on the right side of described valve body (1) is outlet check-valves (35), outlet check-valves
(35) be fixed on outlet non-return valve support (20), have inside outlet check-valves (35) outlet check-valves valve rod (37) with
Outlet check-valve spring (21), outlet check-valves valve rod (37) is provided with outlet check-valve spring (21), and outlet stops
Return, in the middle of valve flap (38) and jump ring back-up ring (23), the second O-ring seal (22) is installed.
2. pressure-reducing low resistance force counter flow stop according to claim 1 it is characterised in that：The opening of described valve body (1)
Mouthful at be placed with middle mouth packing ring (8) and taper bowl (19) and between valve gap (9), be provided with taper bowl (19) diaphragm top board (16) and
It is placed with diaphragm (17) in the middle of diaphragm lower platen (18), diaphragm top board (16) and diaphragm lower platen (18)；Valve gap (9) upper left side
Straight joint (10) is installed, straight joint (10) is connected with copper pipe (12) and passes through rotation under nut (11) tightens fixing linking, copper
Pipe (12) connects copper ball valve (14) by three way cock (13)；Described valve gap (9) middle setting has drain valve valve rod (15).
3. pressure-reducing low resistance force counter flow stop according to claim 2 it is characterised in that：Described drain valve valve rod
(15) connect valve body (1) bottom discharge valve (36), drain valve valve rod (15) bottom is wrapped in centre by drain valve flap (24), row
It is provided with the 3rd O-ring seal (31), the 4th O-ring seal (25), draining between water valve valve rod (15) and drain valve flap (24)
Valve interior sealing pad (30) and draining valve insert lower platen (26), drain valve valve rod (15) is provided with draining valve spring (27)；
Described drain valve (36) bottom is provided with water draining beak (29) and chock plug (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620891362.9U CN205978671U (en) | 2016-08-17 | 2016-08-17 | Decompression type hangs down resistance backflow preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620891362.9U CN205978671U (en) | 2016-08-17 | 2016-08-17 | Decompression type hangs down resistance backflow preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205978671U true CN205978671U (en) | 2017-02-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620891362.9U Active CN205978671U (en) | 2016-08-17 | 2016-08-17 | Decompression type hangs down resistance backflow preventer |
Country Status (1)
| Country | Link |
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| CN (1) | CN205978671U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107178635A (en) * | 2017-07-01 | 2017-09-19 | 宁波华成阀门有限公司 | A kind of copper modeling composite pressure reducing formula backflow preventer and its manufacture method |
| CN107327598A (en) * | 2017-07-01 | 2017-11-07 | 宁波华成阀门有限公司 | A kind of compound double check valve (DCV) of copper modeling and its manufacture method |
-
2016
- 2016-08-17 CN CN201620891362.9U patent/CN205978671U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107178635A (en) * | 2017-07-01 | 2017-09-19 | 宁波华成阀门有限公司 | A kind of copper modeling composite pressure reducing formula backflow preventer and its manufacture method |
| CN107327598A (en) * | 2017-07-01 | 2017-11-07 | 宁波华成阀门有限公司 | A kind of compound double check valve (DCV) of copper modeling and its manufacture method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |