CN109237086A - A kind of non-return valve - Google Patents
A kind of non-return valve Download PDFInfo
- Publication number
- CN109237086A CN109237086A CN201811411276.3A CN201811411276A CN109237086A CN 109237086 A CN109237086 A CN 109237086A CN 201811411276 A CN201811411276 A CN 201811411276A CN 109237086 A CN109237086 A CN 109237086A
- Authority
- CN
- China
- Prior art keywords
- gasket
- shell
- seal
- gasket seal
- water
- 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.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 119
- 238000007789 sealing Methods 0.000 claims abstract description 39
- 230000002411 adverse Effects 0.000 claims abstract description 33
- 238000009434 installation Methods 0.000 claims description 27
- 239000002184 metal Substances 0.000 claims description 27
- 108090000565 Capsid Proteins Proteins 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims 1
- 239000003292 glue Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 12
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/06—Check valves with guided rigid valve members with guided stems
- F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/048—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded combined with other safety valves, or with pressure control devices
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The invention discloses a kind of non-return valves, it include shell, there is water stream channel in the shell, it is characterized in that being equipped with the adverse current part for preventing water adverse current in the shell, the adverse current part includes diaphragm seal, valve rod and the limit film cooperated with shell with water stream channel sealing cooperation, the connection of one end of the diaphragm seal and valve rod, the limit film is arranged in the other end of valve rod and cooperates with valve stem slides, spring is arranged on the valve rod, and be arranged between diaphragm seal and limit film, the limit film always with the inner end face contact of shell.For the present invention in water adverse current, spring reset pushes sealing element to seal water stream channel, therefore enters water stream channel regardless of water pressure can prevent counter-flow water, simultaneously, counter-flow water further presses to diaphragm seal, not only will not influence the sealing of diaphragm seal, also will increase sealing effect.
Description
Technical field
The present invention relates to being a kind of non-return valve, in particular to be a kind of non-return valve suitable for water heater.
Background technique
Non-return valve is widely used in water heater, prevents hot water and cold water adverse current, avoids hot water and cold water mix.Traditional check
Valve is using cone valve made of rubber, and water inlet end is big, and water outlet is small, and when normal water flow, water outlet is strutted, and water flow is normal, when
When water adverse current, attached drawing 1 is seen, squeeze side wall in A, B both direction, water outlet closure so avoids water adverse current, this kind of non-return valve is deposited
In two disadvantages, 1, be easy failure in a low voltage state, too small to the lateral wall pressure of cone valve under low-pressure state, water outlet cannot
It is closed completely, thus still will appear water adverse current；2, this kind of non-return valve cannot be used alone, it is necessary to special part installation be cooperated to make
With, thus use, installation more inconvenience.
Summary of the invention
In view of technical problem present in background technique, technical problem solved by the invention is intended to provide a kind of assemble just
Benefit and the non-return valve for preventing water backflow phenomena completely.
In order to solve the above technical problems, the present invention adopts the following technical scheme that: this kind of non-return valve includes shell, institute
Stating has water stream channel in shell, it is characterised in that the adverse current part for preventing water adverse current, the adverse current part are equipped in the shell
Include with the diaphragm seal of water stream channel sealing cooperation, valve rod and limit film with shell cooperation, the diaphragm seal and valve rod
One end connection, the limit film are arranged in the other end of valve rod and cooperate with valve stem slides, are arranged with spring on the valve rod, and
Be arranged between diaphragm seal and limit film, the limit film always with the inner end face contact of shell.
The inner face of the limit film and shell matches, and offers limbers in the limit film.
The fitting area of the water stream channel and diaphragm seal is truncated cone-shaped, and is greater than before the caliber of the water stream channel of fitting area
Below, the diaphragm seal includes metal gasket and rubber sheet gasket, and the outer diameter of the rubber sheet gasket is greater than metal gasket, and described
Rubber sheet gasket is arranged in front of metal gasket.
The diaphragm seal, limit film and valve rod coaxial arrangement.
The outer surface of the shell is provided with annular groove, and shell is divided into procapsid and back casing by the annular groove, described
Relief hole identical with annular groove is offered on back casing.
Pressure release part with relief hole cooperation is installed in the back casing.
The pressure release part includes installation axle and sets gradually gasket seal on the mounting shaft, gasket seal two and make
The spring two that gasket seal is bonded with gasket seal two, the gasket seal two are slidably matched with installation axle, the gasket seal
Two diameter is greater than the diameter of water stream channel, and the gasket seal two and relief hole sealing cooperate, the gasket seal two
Center offers the inlet opening with gasket seal sealing cooperation, the outer diameter of the gasket seal be greater than the diameter of inlet opening and
Less than the diameter of water stream channel.
The gasket seal and gasket seal two are rubber sheet gasket, the both ends point of the gasket seal and gasket seal two
Be not provided with metal collar and metal collar two, and offer limbers two in the metal collar two, the limbers two with
Inlet opening communicates, and the front end connection of the metal collar and installation axle, the rear end of the installation axle is provided with limit stop ring, described
Spring two is arranged between limit stop ring and metal collar two.
The gasket seal two is matched with the inner cavity of back casing, and the ring for placing sealing ring is provided in the back casing
Shape slot, the gasket seal two are bonded with sealing ring, between pressure release between the gasket seal two and the front end face of back casing
Gap,
The both ends of the shell are equipped with preceding attachment base and rear attachment base, and the preceding attachment base and rear attachment base connect with shell screw thread
It connects, the front end of the preceding attachment base and the rear end of rear attachment base are equipped with installation screw thread.
For the present invention in normal circulation, the pressure of water flow overcomes the elastic force of spring, pushes diaphragm seal to move forward, water flow is logical
Road open, in water adverse current, spring reset push sealing element water stream channel is sealed, therefore regardless of water pressure can prevent it is inverse
Flowing water enters water stream channel, meanwhile, counter-flow water further presses to diaphragm seal, not only will not influence the sealing of diaphragm seal, can also
Increase sealing effect, the present invention prevents counter-flow water and enters water stream channel, avoids cold water, hot water mixing, using stabilization, effectively.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of background technique.
Fig. 2 is structural schematic diagram of the invention.
Fig. 3 is cross-sectional view of the invention.
Fig. 4 is schematic diagram when water flow of the present invention is logical.
Schematic diagram when Fig. 5 is water adverse current of the present invention.
Fig. 6 is the schematic diagram of limit film of the present invention.
Specific embodiment
The related details and working principle of embodiments of the present invention and embodiment are described with reference to the accompanying drawing.This kind of check
Valve, includes shell 9,17, has water stream channel 10 in the shell, and in the present invention, the water (flow) direction is front, water adverse current
Direction is rear, that is, water inlet end 21 is rear, and water outlet 22 is front.It is installed with adverse current part the front end of the shell
The rear end of chamber, the shell has pressure release part installation cavity, and two installation cavitys are communicated with water stream channel 10；For the ease of pressure release part and inverse
The installation of part is flowed, the both ends of the shell are decomposed into preceding attachment base 19 and rear attachment base 1, and the preceding attachment base and rear attachment base are equal
It is threadedly coupled with shell, preceding attachment base 19 and rear attachment base 1 is unloaded, so that it may load and unload pressure release part and adverse current part, installation is more
It is easy；The front end of the preceding attachment base 19 and the rear end of rear attachment base 1 be equipped with installation screw thread 22, by installation screw thread with it is soft
Pipe is directly threadedly coupled, or use is connect with standard cap, the present invention is used as general part, use scope is wide, and pacifies
Dress, disassembly are simple.
The adverse current part for preventing water adverse current is installed, the adverse current part includes and water in the adverse current part installation cavity of the shell
The diaphragm seal 13 of the sealing cooperation of circulation road 10,14, valve rod 15 and the limit film 18 with shell cooperation, the diaphragm seal and valve rod
One end connection, the limit film 18 are arranged in the other end of valve rod and are slidably matched with valve rod 15, are arranged with bullet on the valve rod
Spring 16, and be arranged between diaphragm seal and limit film, the elastic force of spring makes diaphragm seal 13,14 and water stream channel 10 seal cooperation,
Contact limit film 18 with the inner face of shell 23 always, because the front end of shell is front connector 19, that is to say, that the limit
The inner end face contact of piece and front connector 19 in adverse current part merging adverse current part installation cavity, screws front connector 19, diaphragm seal with
Water stream channel sealing cooperation, the inner end face contact of the limit film and front connector, when water flow is led to, the pressure of water flow overcomes spring
16 elastic force pushes diaphragm seal 13,14 mobile to limit film 18, and because of the blocking of shell, limit film 18 is motionless, and spring 16 is pressurized,
Valve rod 15 forward extends out, and water stream channel 10 is opened, normal to be discharged；When water outlet, spring 16, which resets, pushes sealing element 13,14
Water stream channel is sealed；When water adverse current, counter-flow water presses to diaphragm seal 13,14, the elastic force direction one of direction of exerting pressure and spring
It causes, therefore not only will not influence sealing effect, also will increase sealing effect, the present invention pushes diaphragm seal by water because of the elastic force of spring
Circulation road sealing, therefore enter water stream channel regardless of water pressure can prevent counter-flow water.In order to improve the stability of adverse current part,
The diaphragm seal 13,14, limit film 18 and valve rod 15 are coaxially disposed, and the limit film 18 and the inner face 23 of shell match,
That is, the shape of the limit film is consistent with the shape of inner face, such limit film will not move in shell, valve rod 15
Movement is more stable, to avoid blocking, limbers 24 is offered in the limit film, the limbers is uniformly distributed, and water flow is steady
It is fixed.In order to improve sealing effect, the fitting area 26 of the water stream channel and diaphragm seal is truncated cone-shaped, and the water stream channel of fitting area
Caliber before it is big later, the diaphragm seal includes metal gasket 13 and rubber sheet gasket 14, the outer diameter of the rubber sheet gasket
Greater than metal gasket, and the rubber sheet gasket is arranged in front of metal gasket, and the metal gasket guarantees strong among diaphragm seal
Degree, avoids collapsing influence sealing effect among diaphragm seal, and rubber sheet gasket is soft, is bonded with inner walls, guarantees sealing effect.
The outer surface of the shell is provided with annular groove 12, and shell is divided into procapsid 17 and back casing 9 by the annular groove,
The relief hole 11 communicated with annular groove is offered on the front end face of the back casing, when counter-flow water presses through it is big when, to avoid water inverse
It is flow to water inlet end 21, is drained by the timely pressure release of relief hole 11, in order to further prevent water adverse current to water inlet end, the back casing
Pressure release part with relief hole cooperation is inside installed.The pressure release part includes installation axle 3 and sets gradually on the mounting shaft
Gasket seal 7, gasket seal 26 and the spring 24 for being bonded gasket seal with gasket seal two, the gasket seal 7 preceding,
Rear, the gasket seal 26 is slidably matched spring 24 with installation axle 3, and the diameter of the gasket seal 26 is logical greater than water flow
The diameter in road, and the gasket seal 26 and the sealing of relief hole 11 cooperate, the gasket seal 26 and back casing in the present embodiment
Inner cavity matching, that is, matched with the installation cavity of pressure release part, water can not enter from the edge of gasket seal two, the back casing
Inside be provided with the annular groove for placing sealing ring 27, the gasket seal two is bonded with sealing ring, the gasket seal two with
There is pressure release gap 28, during installation, rear connectors are by the edge and sealing ring of gasket seal 26 between the front end face of back casing
It fits closely, when water flow is led to, forward hydraulic pressure makes gasket seal two be affixed to the front end face of back casing, relief hole is sealed, in this way
Not only guaranteed that relief hole sealed when water flow is led to, but also guaranteed to prevent water from entering water inlet end in water adverse current；The gasket seal 26
Center offers the inlet opening 25 with gasket seal sealing cooperation, and the outer diameter of the gasket seal 7 is greater than the straight of inlet opening
Diameter and the diameter for being less than water stream channel, when water flow is led to, hydraulic pressure seals gasket seal 26 by relief hole 11, and hydraulic pressure overcomes spring
Two elastic force pushes gasket seal 7 to move forward, and inlet opening 25 is opened, and water is discharged by water stream channel from water outlet 22, works as water
When adverse current, spring two resets, and gasket seal 7 is bonded with gasket seal 26, and inlet opening 25 is closed, and the hydraulic pressure makes gasket seal 7
It is fitted closely with gasket seal two, because the marginal position of gasket seal 26 seals, water can only enter from pressure release gap 28, by letting out
Hole 11 is pressed to be discharged, so realization pressure release.
For the purposes of improving sealing effect, the gasket seal 7 and gasket seal 26 are rubber sheet gasket, the sealing
The both ends of gasket and gasket seal two are respectively arranged with metal collar 8 and metal collar 25, and open in the metal collar 25
Equipped with limbers two, the limbers two is communicated with inlet opening 25, and the metal collar 8 is connect with the front end of installation axle 3, together
Sample, the metal collar 8 and metal collar 25 guarantee the intensity among gasket seal and gasket seal two, avoid gasket seal
With influence sealing effect is collapsed among gasket seal two, and rubber is soft, and adaptation is good, guarantees sealing effect；The installation axle
Rear end be provided with limit stop ring 2, the spring 24 is arranged between limit stop ring 2 and metal collar 22, the bullet of spring two
Power is bonded gasket seal with gasket seal two, seals gasket seal by the inlet opening of gasket seal two, prevents water adverse current extremely
Water inlet end.
Under conventional sense of the present invention, the elastic force of the spring 24 is bonded gasket seal with gasket seal two, inlet opening 25
Sealing, the elastic force of the spring 16 seal diaphragm seal 13,14 by intake tunnel；When water flow is led to, the hydraulic pressure overcomes spring
24 elastic force moves forward gasket seal 7, and 3 opposing seal gasket 26 of installation axle moves forward, and inlet opening 25 is opened, water
Into water stream channel 10, hydraulic pressure overcomes the elastic force of spring 16, and diaphragm seal is pushed to move forward, valve rod 15 then relative limit piece 18 to
Preceding movement, water stream channel are opened, and are discharged from water outlet 22.When water adverse current, counter-flow water presses to diaphragm seal 13,14, pressure side
It to consistent with the elastic force direction of spring 16, therefore not only will not influence sealing effect, also will increase sealing effect, that is to say, that close
Water stream channel 10 is fully sealed mounting, enters water stream channel regardless of water pressure can prevent counter-flow water, if hydraulic pressure is excessive,
Diaphragm seal deformation, causes counter-flow water to enter water stream channel 10, and water enters pressure release gap 28 and is discharged from relief hole 11, so realizes and let out
Pressure prevents hydraulic pressure is excessive from entering water inlet end, and hydraulic pressure seals gasket seal 7 by the inlet opening 25 of gasket seal two, and close
Back casing inner wall is fully sealed gasket 26, forms one of sealing barrier, counter-flow water is avoided to enter water inlet end 21, so many
It protects again, prevents the mixing of hot water or cold water caused by water adverse current.
Claims (10)
1. a kind of non-return valve includes shell, there are water stream channel (10) in the shell, it is characterised in that peace in the shell
Equipped with the adverse current part for preventing water adverse current, the adverse current part include with water stream channel sealing cooperation diaphragm seal, valve rod (15) and
With the limit film (18) of shell cooperation, one end of the diaphragm seal and valve rod is connected, and the another of valve rod is arranged in the limit film
It holds and cooperates with valve stem slides, be arranged with spring (16) on the valve rod, and be arranged between diaphragm seal and limit film, the limit
Bit slice is contacted with the inner face of shell (23) always.
2. non-return valve according to claim 1, it is characterised in that the inner face of the limit film and shell matches, and institute
It states and offers limbers (24) in limit film.
3. non-return valve according to claim 1, it is characterised in that the fitting area (26) of the water stream channel and diaphragm seal is
Truncated cone-shaped, and before the caliber of the water stream channel of fitting area greatly later, the diaphragm seal includes metal gasket (13) and rubber
Glue gasket (14), the outer diameter of the rubber sheet gasket is greater than metal gasket, and the rubber sheet gasket is arranged in front of metal gasket.
4. non-return valve according to claim 1, it is characterised in that the diaphragm seal, limit film and valve rod coaxial arrangement.
5. non-return valve according to claim 1-4, it is characterised in that the outer surface of the shell is provided with annular
Shell is divided into procapsid (17) and back casing (9), offered on the back casing and annular groove phase by slot (12), the annular groove
Logical relief hole (11).
6. non-return valve according to claim 5, it is characterised in that be equipped in the back casing and let out with what relief hole cooperated
Casting die.
7. non-return valve according to claim 6, it is characterised in that the pressure release part includes installation axle (3) and successively sets
Set gasket seal (7), gasket seal two (6) and the spring two for being bonded gasket seal with gasket seal two on the mounting shaft
(4), the gasket seal two is slidably matched with installation axle, and the diameter of the gasket seal two is greater than the diameter of water stream channel, and
The gasket seal two cooperates with relief hole sealing, and the center of the gasket seal two is offered matches with gasket seal sealing
The inlet opening (25) of conjunction, the outer diameter of the gasket seal are greater than the diameter of inlet opening and are less than the diameter of water stream channel.
8. non-return valve according to claim 7, it is characterised in that the gasket seal and gasket seal two are rubber pad
The both ends of piece, the gasket seal and gasket seal two are respectively arranged with metal collar (8) and metal collar two (5), and described
Limbers two is offered in metal collar two, the limbers two is communicated with inlet opening, before the metal collar and installation axle
End connection, the rear end of the installation axle are provided with limit stop ring (2), and the spring two is arranged in limit stop ring and metal collar two
Between.
9. non-return valve according to claim 7, it is characterised in that the gasket seal two is matched with the inner cavity of back casing, institute
The annular groove being provided in back casing for placing sealing ring (27) is stated, the gasket seal two is bonded with sealing ring, described close
There are pressure release gap (28) between gasket two and the front end face of back casing.
10. non-return valve according to claim 1, it is characterised in that the both ends of the shell be equipped with preceding attachment base (19) and after
Attachment base (1), the preceding attachment base and rear attachment base are threadedly coupled with shell, the front end of the preceding attachment base and rear connection
The rear end of seat is equipped with installation screw thread (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811411276.3A CN109237086A (en) | 2018-11-24 | 2018-11-24 | A kind of non-return valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811411276.3A CN109237086A (en) | 2018-11-24 | 2018-11-24 | A kind of non-return valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109237086A true CN109237086A (en) | 2019-01-18 |
Family
ID=65073953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811411276.3A Pending CN109237086A (en) | 2018-11-24 | 2018-11-24 | A kind of non-return valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109237086A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1447303A (en) * | 1973-04-23 | 1976-08-25 | Braukmann Armaturen | Combunation backflow preventer and anti-siphon valve |
| AT335808B (en) * | 1974-03-29 | 1977-04-12 | Braukmann Armaturen | BACKFLOW PREVENTION |
| CA1028589A (en) * | 1975-09-19 | 1978-03-28 | Heinz W. Braukmann | Back flow preventer valve |
| CN101749461A (en) * | 2008-12-15 | 2010-06-23 | 刘永 | Screw-thread backflow prevention device being free from being equipped with external conduit |
| CN102865389A (en) * | 2012-08-30 | 2013-01-09 | 杭州春江阀门有限公司 | Water hammer resistant backflow preventer |
| CN209100711U (en) * | 2018-11-24 | 2019-07-12 | 浙江科欣实业有限公司 | A kind of non-return valve |
-
2018
- 2018-11-24 CN CN201811411276.3A patent/CN109237086A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1447303A (en) * | 1973-04-23 | 1976-08-25 | Braukmann Armaturen | Combunation backflow preventer and anti-siphon valve |
| AT335808B (en) * | 1974-03-29 | 1977-04-12 | Braukmann Armaturen | BACKFLOW PREVENTION |
| CA1028589A (en) * | 1975-09-19 | 1978-03-28 | Heinz W. Braukmann | Back flow preventer valve |
| CN101749461A (en) * | 2008-12-15 | 2010-06-23 | 刘永 | Screw-thread backflow prevention device being free from being equipped with external conduit |
| CN102865389A (en) * | 2012-08-30 | 2013-01-09 | 杭州春江阀门有限公司 | Water hammer resistant backflow preventer |
| CN209100711U (en) * | 2018-11-24 | 2019-07-12 | 浙江科欣实业有限公司 | A kind of non-return valve |
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