CN207728968U - A kind of backflow preventer - Google Patents
A kind of backflow preventer Download PDFInfo
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- CN207728968U CN207728968U CN201721502975.XU CN201721502975U CN207728968U CN 207728968 U CN207728968 U CN 207728968U CN 201721502975 U CN201721502975 U CN 201721502975U CN 207728968 U CN207728968 U CN 207728968U
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- return
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- valve
- flap
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Abstract
The utility model discloses a kind of backflow preventers, including valve body, water inlet is additionally provided on valve body, water outlet and pressure release seat, and correspondence is equipped with inlet valve, outlet valve, relief valve, inlet valve includes preceding non-return seat and preceding non-return flap, outlet valve includes rear non-return seat and rear non-return flap, preceding non-return seat and rear non-return seat inner wall are equipped with linking arm, linking arm end is equipped with lantern ring, non-return axis is cased in lantern ring, preceding non-return flap and rear non-return flap are realized by non-return axis and are flexibly connected with preceding non-return seat and rear non-return seat, relief valve includes piston, relief valve is divided into upper pressure chamber and pushes chamber by piston up and down, upper pressure chamber is connect by the connecting pipe being arranged in valve body with water inlet inner cavity, chamber is pushed to connect by the cavity between backflash and inlet valve and outlet valve.The beneficial effects of the utility model：Simple in structure easy to repair, passability and leakproofness are high, and pressure release induction is sensitive and accurate, and pressure release control effect is good.
Description
Technical field
The utility model is related to a kind of valve, specifically a kind of backflow preventer.
Background technology
Backflow preventer traditional at present is mostly the connection that non-return axis realization and non-return flap is socketed using half a month formula connecting plate,
And half a month formula connecting plate blocks the general aperture of inlet and outlet, causes flow circulation unsmooth, even results in hydraulic pressure change
Change causes non-return flap to open by mistake, and the face that is sealed between non-return flap and non-return seat contacts, because elastic device needs to consider hydraulic pressure
Problem is unable to tension, and leading to the two contact, tight seal does not fail.
Backflow preventer leads to water pressure fluctuations because present pressure of supply water is unstable, easily causes that chamber pressure is excessively high, exocoel
Pressure is too small, causes non-return flap that can not open, therefore is equipped with relief valve in body base, is realized by relief valve and adjusts inner cavity pressure
Power, but by being connected to inner cavity and exocoel when the work of relief valve, push middle part piston to move by the different pressure of the two real
It now opens and locks, piston bush moves up and down on a guiding axis along guiding axis, but passes and lead to equipment upper piston area chamber
Body is intake by one end, causes piston all-round pressure uneven, tilting of the piston, in moving process with guiding axis and four sides
Wall friction, resistance become larger, and lead to the problem of stress reaction inaccuracy.
Utility model content
The purpose of this utility model is to provide a kind of backflow preventer, solves the complicated inconvenient repair of traditional equipment,
The technical issues of leakproofness and circulation are poor, and stress reaction accuracy is low, pressure release is failed.
To achieve the above object, the technical solution of the utility model includes valve body, and water inlet, water outlet are additionally provided on valve body
With pressure release seat, and correspondence inlet valve, outlet valve, relief valve are installed, inlet valve includes preceding non-return seat and preceding non-return flap, outlet valve
Including rear non-return seat and rear non-return flap, preceding non-return seat and rear non-return seat inner wall are equipped with linking arm, and linking arm end is equipped with lantern ring, set
Non-return axis, preceding non-return flap and rear non-return flap is cased in ring to realize with the activity of preceding non-return seat and rear non-return seat even by non-return axis
It connects, relief valve includes piston, and relief valve is divided into upper pressure chamber and pushes chamber by piston up and down, and upper pressure chamber is by being arranged in valve body
Connecting pipe is connect with water inlet inner cavity, is pushed chamber and is connected by the cavity between backflash and inlet valve and outlet valve, pressure release
Valve further includes end cap, pressure release axis, polywater seat, elastic device I compositions, and piston is socketed in bottom in end cap, and upper pressure chamber is on piston
Side wall and end cap madial wall sandwich to be formed, and water-flowing trough is equipped on the outside of end cap, and water flowing trench bottom is equipped with the inclined hole being connected to upper pressure chamber,
The elastic device I that piston underside is equipped with pressure release axis and is socketed on pressure release axis, piston underside are equipped with row pressure seat, and row pressure seat passes through lock
Tightly nut is connect with pressure release seat, and polywater seat is equipped on the downside of pressure release seat, formation pair is protruded to the right on the right side of preceding non-return seat and rear non-return seat
Ring I is met, sealing ring I corresponding with butt joint ring I is equipped on the left of preceding non-return flap and rear non-return flap, piston touches side with row pressure seated connection and is equipped with
Sealing ring II, row pressure seat are equipped with butt joint ring II, sealing ring II and butt joint ring II with piston contact side and correspond to, and set is equipped on the left of lantern ring
The elastic device II being connected on non-return axis realizes the auto lock of preceding non-return flap and rear non-return flap by elastic device II, connection
Pipeline is divided into vertical pipe and horizontal pipe, and vertical pipe runs through body wall with horizontal pipe, and is equipped in end and blocks spiral shell
Bolt, horizontal pipe is corresponding with water-flowing trough connection, and body top opens wide and forms service hatch, is equipped with cover board on the upside of service hatch, on cover board
Side is equipped with suspension hook, is equipped with preformed hole on the upside of water inlet, water outlet and cover board, preformed hole passes through silk plug bolt.
Due to the adoption of the above technical scheme, the beneficial effects of the utility model：
The complicated inconvenient repair of traditional equipment is solved, leakproofness and circulation are poor, and stress reaction accuracy is low, pressure release is lost
The technical issues of effect
1, simple in structure, it is easy to maintenance.
2, good airproof performance is changed to a property contact sealing by original face property contact sealing, is obtained under same pressure more preferable
Sealing effect.
3, circulation is good, is connected by linking arm, increases the passability of flow.
4, relief valve induction is accurate sensitive, is supplied water by one end and is changed to surrounding water supply, solves piston caused by one end is supplied water
It tilts, the big problem of frictional resistance.
5, it prevents from causing there are air pressure release effect to fail in relief valve under the cooperation for blocking bolt, pressure release control effect
Fruit is good.
Description of the drawings
The utility model is described further in conjunction with attached drawing.
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the areas Tu1Zhong A enlarged drawing.
Fig. 3 is the areas Tu1Zhong B enlarged drawing.
In figure：1, valve body, 2, water inlet, 3, water outlet, 4, pressure release seat, 5, inlet valve, 6, outlet valve, 7, relief valve, 8,
Preceding non-return seat, 9, preceding non-return flap, 10, rear non-return seat, 11, rear non-return flap, 12, linking arm, 13, lantern ring, 14, non-return axis, 15, living
Plug, 16, upper pressure chamber, 17, push chamber, 18, connecting pipe, 19, backflash, 20, end cap, 21, pressure release axis, 22, polywater seat, 23,
Elastic device I, 24, water-flowing trough, 25, inclined hole, 26, row pressure seat, 27, locking nut, 28, butt joint ring I, 29, sealing ring I, 30, close
Seal II, 31, butt joint ring II, 32, elastic device II, 33, vertical pipe, 34, horizontal pipe, 35, block bolt, 36, repair
Hole, 37, cover board, 38, suspension hook, 39, preformed hole, 40, silk plug bolt.
Specific implementation mode
As shown in Figs. 1-3, the utility model includes valve body 1, and water inlet 2, water outlet 3 and pressure release seat are additionally provided on valve body 1
4, and correspond to and inlet valve 5, outlet valve 6, relief valve 7 are installed, inlet valve 5 includes preceding non-return seat 8 and preceding non-return flap 9, outlet valve 6
Including rear non-return seat 10 and rear non-return flap 11, preceding non-return seat 8 and rear 10 inner wall of non-return seat are equipped with linking arm 12,12 end of linking arm
Equipped with lantern ring 13, it is cased with non-return axis 14, preceding non-return flap 9 and rear non-return flap 11 in lantern ring 13 and is realized and preceding non-return by non-return axis 14
The flexible connection of seat 8 and rear non-return seat 10, relief valve 7 include piston 15, and about 7 relief valve is divided into upper 16 He of pressure chamber by piston 15
Chamber 17 is pushed, upper pressure chamber 16 is connect by the connecting pipe 18 being arranged in valve body 1 with 2 inner cavity of water inlet, is pushed chamber 17 and is passed through
Cavity connection between backflash 19 and inlet valve 5 and outlet valve 6, relief valve 7 further includes end cap 20, pressure release axis 21, polywater seat
22, elastic device I23 is formed, and piston 15 is socketed in bottom in end cap 20, and upper pressure chamber 16 is in 15 upper side wall of piston and end cap 20
Side wall sandwiches to be formed, and 20 outside of end cap is equipped with water-flowing trough 24, and 24 bottom of water-flowing trough is equipped with the inclined hole 25 being connected to upper pressure chamber 16, living
The elastic device I23 that 15 downside of plug is equipped with pressure release axis 21 and is socketed on pressure release axis 21,15 downside of piston are equipped with row pressure seat 26, row
Wedge 26 is connect by locking nut 27 with pressure release seat 4, and 4 downside of pressure release seat is equipped with polywater seat 22, preceding non-return seat 8 and rear non-return seat
10 right sides are prominent to the right to form butt joint ring I28, and preceding non-return flap 9 and 11 left side of rear non-return flap are equipped with corresponding with butt joint ring I28 close
Seal I29, piston 15 contact side with row pressure seat 26 and are equipped with sealing ring II30, and row pressure seat 26 contacts side with piston 15 and is equipped with butt joint ring
II31, sealing ring II30 and butt joint ring II31 are corresponded to, and 13 left side of lantern ring is equipped with the elastic device II32 being socketed on non-return axis 14,
Realize that the auto lock of preceding non-return flap 9 and rear non-return flap 11, connecting pipe 18 divide for vertical pipe 33 by elastic device II32
With horizontal pipe 34, vertical pipe 33 runs through 1 side wall of valve body with horizontal pipe 34, and is equipped in end and blocks bolt 35, horizontal
Pipeline 34 is corresponding with the connection of water-flowing trough 24, and 1 top of valve body, which is opened wide, forms service hatch 36, and 36 upside of service hatch is equipped with cover board 37, lid
37 upside of plate is equipped with suspension hook 38, and water inlet 2, water outlet 3 and 37 upside of cover board are equipped with preformed hole 39, and preformed hole 39 passes through silk plug spiral shell
Bolt 40.
The operation principle of the utility model：Flow is entered by water inlet 2 inside valve body 1, is discharged by water outlet 3, is worked as water
When pressure P1 when stream enters water inlet 2 is less than 9 right atrial pressure P2 of preceding non-return flap, preceding non-return flap 9 is in elastic device I23 and pressure
Closure blocking flow, when pressure P1 is more than pressure P2, preceding non-return flap 9 and preceding non-return seat 8 are adjacent under the action of P2 with preceding non-return seat 8
It separates, flow is by entering in valve body 1, and when pressure P2 is less than 11 right atrial pressure P3 of rear non-return flap, rear non-return flap 11 is in elasticity
Closure blocking flow, rear non-return flap 11 on the contrary and rear non-return seat are adjacent under the action of device I23 and pressure P3 with rear non-return seat 10
10 separation, flow passes through, but because it is unexpected cause P2 pressure beyond P1 with P2 pressure difference scopes of design when, carried out by relief valve 7
Pressure release, relief valve 7 are moved up and down by the pressure control of the upper pressure chamber 16 and pushing chamber 17 of 15 upper and lower sides of piston, realize relief valve
7 unlatching and sealing, to make that the pressure of chamber 16, the flow of water inlet 2 is pressed to pass through connecting pipe in the more accurate receiving of piston 15
18 enter water-flowing trough 24, then enter upper pressure chamber 16 by the inclined hole 25 that 24 bottom of water-flowing trough is arranged, and are supplied water and are become by past one end
It supplies water for surrounding, so that piston 15 is received pressure more accurate, prevent 15 side of piston from tilting, increase resistance, while playing buffering
Flow prevents erroneous judgement caused by the pressure oscillation of water inlet 2 from opening, and because the sealing of connecting pipe 18 and upper pressure chamber 16 influences, causes
Flow poor fluidity, internal easy residual air, causes pressure release to be failed, horizontal pipe 34 He of the technical program in connecting pipe 18
33 end of vertical pipe, which is equipped with, blocks bolt 35, and blocking bolt 35 by adjusting realizes air discharge, ensures the normal of relief valve 7
Work, the technical program have also been devised preformed hole 39, different accessories can be selected to assemble as needed, such as pressure gauge.
Claims (8)
1. a kind of backflow preventer, including valve body, water inlet, water outlet and pressure release seat, and corresponding peace are additionally provided on the valve body
Equipped with inlet valve, outlet valve, relief valve, it is characterised in that：The inlet valve includes preceding non-return seat and preceding non-return flap, the water outlet
Valve includes rear non-return seat and rear non-return flap, and the preceding non-return seat and rear non-return seat inner wall are equipped with linking arm, the linking arm end
Equipped with lantern ring, it is cased with non-return axis, the preceding non-return flap and rear non-return flap in the lantern ring and is realized and preceding non-return seat by non-return axis
With the flexible connection of rear non-return seat, the relief valve includes piston, and relief valve is divided into upper pressure chamber and pushing by the piston up and down
Chamber, the upper pressure chamber are connect by the connecting pipe being arranged in valve body with water inlet inner cavity, and the pushing chamber passes through backflash
Cavity between inlet valve and outlet valve is connect.
2. a kind of backflow preventer according to claim 1, it is characterised in that：The relief valve further include end cap, pressure release axis,
Polywater seat, elastic device I compositions, the piston are socketed in bottom in end cap, and the upper pressure chamber is in piston on the side wall and end cap
Side wall sandwiches to be formed, and water-flowing trough is equipped on the outside of the end cap, the water flowing trench bottom is equipped with the inclined hole being connected to upper pressure chamber, described
The elastic device I that piston underside is equipped with pressure release axis and is socketed on pressure release axis, the piston underside are equipped with row pressure seat, the row pressure
Seat is connect by locking nut with pressure release seat, and polywater seat is equipped on the downside of the pressure release seat.
3. a kind of backflow preventer according to claim 1, it is characterised in that：On the right side of the preceding non-return seat and rear non-return seat to
Right protrusion forms butt joint ring I, and sealing ring I corresponding with butt joint ring I is equipped on the left of the preceding non-return flap and rear non-return flap.
4. a kind of backflow preventer according to claim 1, it is characterised in that：The piston touches side equipped with close with row pressure seated connection
Seal II, the row pressure seat is equipped with butt joint ring II, the sealing ring II with piston contact side and butt joint ring II is corresponded to.
5. a kind of backflow preventer according to claim 1, it is characterised in that：It is equipped on the left of the lantern ring and is socketed in non-return axis
On elastic device II, the auto lock of preceding non-return flap and rear non-return flap is realized by elastic device II.
6. a kind of backflow preventer according to claim 1 or claim 2, it is characterised in that：The connecting pipe is divided into vertical pipe
And horizontal pipe, the vertical pipe runs through body wall with horizontal pipe, and is equipped in end and blocks bolt, the horizontal tube
Road is corresponding with water-flowing trough connection.
7. a kind of backflow preventer according to claim 1, it is characterised in that：The body top opens wide and forms service hatch,
It is equipped with cover board on the upside of the service hatch, suspension hook is equipped on the upside of the cover board.
8. a kind of backflow preventer according to claim 1, it is characterised in that：On the upside of the water inlet, water outlet and cover board
Equipped with preformed hole, the preformed hole passes through silk plug bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721502975.XU CN207728968U (en) | 2017-11-13 | 2017-11-13 | A kind of backflow preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721502975.XU CN207728968U (en) | 2017-11-13 | 2017-11-13 | A kind of backflow preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207728968U true CN207728968U (en) | 2018-08-14 |
Family
ID=63087568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721502975.XU Active CN207728968U (en) | 2017-11-13 | 2017-11-13 | A kind of backflow preventer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207728968U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109498860A (en) * | 2019-01-15 | 2019-03-22 | 王颖颖 | A kind of medical negative treatment flow diverter anti-backflow device |
| CN114658878A (en) * | 2022-04-13 | 2022-06-24 | 中恒水务科技有限公司 | Non-resistance backflow preventer with double ball valves |
-
2017
- 2017-11-13 CN CN201721502975.XU patent/CN207728968U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109498860A (en) * | 2019-01-15 | 2019-03-22 | 王颖颖 | A kind of medical negative treatment flow diverter anti-backflow device |
| CN114658878A (en) * | 2022-04-13 | 2022-06-24 | 中恒水务科技有限公司 | Non-resistance backflow preventer with double ball valves |
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| GR01 | Patent grant | ||
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