CN205824299U - A kind of pressure-adjustable lift check valve - Google Patents
A kind of pressure-adjustable lift check valve Download PDFInfo
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- CN205824299U CN205824299U CN201620664675.0U CN201620664675U CN205824299U CN 205824299 U CN205824299 U CN 205824299U CN 201620664675 U CN201620664675 U CN 201620664675U CN 205824299 U CN205824299 U CN 205824299U
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Abstract
nullThis utility model relates to a kind of pressure-adjustable lift check valve，Including valve body、Valve gap and pressure-adjustable lift valve core device，Valve body includes valve inlet end、Valve export end and valve body，Body cavity it is provided with in valve body，Body cavity includes medium conveyor chamber and valve body spool chamber，Medium pilot passage it is provided with bottom medium conveyor chamber，It is provided with valve seat with at medium pilot channel connection bottom medium conveyor chamber，Valve gap includes that valve gap connects end and valve gap body，Valve gap is the most internal is provided with valve gap spool chamber，Pressure-adjustable lift valve core device includes flap and resilient push device，Resilient push device includes valve rod and adjusts screw rod，Valve rod is connected by spring with adjusting screw rod，The other end adjusting screw rod is connected with the pressure regulating device of spool chamber integral outer from the bottom pass-out of valve gap，Pressure regulating device includes adjusting bolt and nut and adjusting bolt and nut support.This utility model uses pressure-adjustable lift valve core device to change the critical pressure value of valve opening, has adaptable feature.
Description
Technical field
This utility model relates to a kind of lift check valve, particularly to a kind of pressure-adjustable lift check valve, only belongs to
Go back to valve field.
Background technology
Lift check valve refers to that the pressure relying on medium flowing itself to produce, to open and close the valve of flap, is commonly used to prevent
Only medium flows backwards.Check-valves belongs to a kind of automatic valve, and its Main Function is to prevent medium from flowing backwards, prevent pump and drive motor
Reversion, and the releasing of vessel media.Under the fluid pressure effect of a direction flowing, flap opens circulation, when fluid is anti-
During the flowing of direction, fluid pressure and certainly reforming of flap are made a concerted effort so that flap acts on valve seat, thus cut off medium and flow backwards.Existing
The unlatching pressure of some lift check valves is typically a specific numerical value, if needing to change this numerical value so that flowing
The relatively low medium of pressure also can pass through valve, is necessary for changing the valve of other parameter coupling.At the pipeline ring that some are special
In border, the pressure of flow media is probably the numerical value of a change, when pressure medium is less than the unlatching pressure of valve setpoint, just
Can not pass through valve, this have impact on the suitability of pipeline, also brings trouble to pipeline remodeling and maintenance.
Summary of the invention
This utility model pressure-adjustable lift check valve discloses new scheme, uses pressure-adjustable lift valve core device to change
Become the critical pressure value of valve opening, solve the problem that existing lift check valve cannot meet the circulation of pressure changeable medium.
This utility model pressure-adjustable lift check valve includes valve body, valve gap and pressure-adjustable lift valve core device, valve body
Including valve inlet end, valve export end and valve body, being provided with body cavity in valve body, body cavity includes medium conveyor chamber
With valve body spool chamber, bottom medium conveyor chamber, it is provided with medium pilot passage, with medium pilot channel connection bottom medium conveyor chamber
Place is provided with valve seat, and the elongated end of medium pilot passage connects with valve inlet end, and valve export end connects with medium conveyor chamber, valve
Lid includes that valve gap connects end and valve gap body, and valve gap is the most internal is provided with valve gap spool chamber, and valve gap connects end by valve gap and fixes close
Big envelope is located on valve body spool chamber outer wall the spool chamber entirety forming inside, and pressure-adjustable lift valve core device includes flap and bullet
Property push rod device, resilient push device include valve rod and adjust screw rod, flap is pushed against and is pressed on valve seat envelope by one end of valve rod
Stifled medium pilot passage, the other end of valve rod is connected with one end elastic stress of spring, the other end of spring and adjustment screw rod
One end elastic stress connects, and the other end adjusting screw rod connects from the pressure regulating device of the bottom pass-out of valve gap with spool chamber integral outer
Connecing, pressure regulating device includes adjusting bolt and nut and adjusting bolt and nut support, adjusts bolt and nut support and is fixed on bottom valve gap
On outside, adjust bolt and nut and be fixed on adjustment bolt and nut support, adjust the screw rod other end and formed with adjusting bolt and nut
Internal and external threads connects.The liquid adjusting valve inlet end by rotating the stress state adjusted in screw rod other end change spring is lifted
Play the pressure needed for flap.
This utility model pressure-adjustable lift check valve uses pressure-adjustable lift valve core device to change facing of valve opening
Boundary's force value, has adaptable feature.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of embodiment of this utility model pressure-adjustable lift check valve.
Wherein, 1 is valve body, and 2 is flap, and 3 is cushion block, and 4 is fairlead, and 5 are locked out nut, and 6.1 is lower spring cup, 6.2
Being upper spring seat, 7 is spring, and 8 is pad, and 9 is valve rod, and 10 is valve gap, and 11 is to adjust screw rod, and 12 is valve seat, and 13 is filler, 14
Being filler pressing sleeve, 15 is hold-down grid, and 16 is support, and 17 is to adjust bolt and nut, and 18 is protective cover, and 19 is nut, and 20 is spiral shell
Post, 21 is nut, and 22 is packing ring, and 23 is stud, and 24 is nut, and 25 is packing ring.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As it is shown in figure 1, the schematic diagram of this utility model pressure-adjustable lift check valve.Pressure-adjustable lift check valve includes
Valve body, valve gap and pressure-adjustable lift valve core device, next upper inner chamber fastening socket formation valve of valve body and valve gap one, adjustable
Pressure lift valve core device is divided into the spool part set in the lumen and the pressure regulation part being located at outside inner chamber, by operation pressure-regulating portion
Divide the pressure adjusting spool portion compresses plugging valve passage, thus change the threshold opening pressure that medium is through-flow.Valve body includes
Valve inlet end, valve export end and valve body, be provided with body cavity in valve body, body cavity includes the medium conveying of bottom
The valve body spool chamber on chamber and top, is provided with medium pilot passage bottom medium conveyor chamber, with medium pilot bottom medium conveyor chamber
Being provided with valve seat at channel connection, the elongated end of medium pilot passage connects with valve inlet end, and medium passes through medium pilot passage
Promoting spool Open valve, valve export end connects with medium conveyor chamber.Valve gap includes that valve gap connects end and valve gap body, valve gap
Basis is the most internal is provided with valve gap spool chamber, and valve gap connects end fixing seal by valve gap and is set on valve body spool chamber outer wall formation inside
Spool chamber overall.Pressure-adjustable lift valve core device includes flap and resilient push device, and resilient push device includes valve rod
With adjustment screw rod, flap is pushed against and is pressed on valve seat closure medium pilot passage by one end of valve rod, and when having more than, unlatching is critical
Opening when the medium of pressure flows into, the other end of valve rod is connected with one end elastic stress of spring, the other end of spring and adjustment
One end elastic stress of screw rod connects, and adjusts the other end of screw rod from the pressure regulation of the bottom pass-out of valve gap Yu spool chamber integral outer
Mechanism connects.Pressure regulating device includes adjusting bolt and nut and adjusting bolt and nut support, adjusts bolt and nut support and is fixed on valve
In lid bottom outside, adjust bolt and nut be fixed on adjustment bolt and nut support on, specifically can pass through stud, nut formation
Locking mechanism is fixed on adjustment bolt and nut support, and specifically stud is through the tapped through hole adjusted on bolt and nut and adjustment
Tapped through hole on bolt and nut support forms internal and external threads and connects, and nut check is above-mentioned threaded, is provided with packing ring therebetween, rises
To the effect being stably connected with.Adjust the screw rod other end to be connected with adjustment bolt and nut formation internal and external threads.Spiral shell is adjusted by rotating
The bar other end changes the liquid of the stress state adjustment valve inlet end in spring and lifts the pressure needed for flap, specifically screws in
Adjust screw rod pressuring spring, thus increase valve opening critical pressure, screw out and adjust screw rod pull-off spring, thus reduce valve and open
Open critical pressure.The fluid that the introducing of the pressure-adjustable lift valve core device of this programme makes valve be adapted to change pressure is situated between
Matter, reaches dynamically to control the flow regime of fluid media (medium) by adjusting timely.
In order to ensure the stability that valve rod and flap are in transmission connection, it is to avoid occur rocking, depart from, problem, the we such as channel bit
It is a tubular structure that the flap of case uses, and the blind end of above-mentioned tubular structure is pressed on valve seat closure medium pilot passage, cylinder
Cushion block is passed through in the bottom being inserted with above-mentioned valve rod one end, valve rod one end and tubular structure open lumen in the open lumen of shape structure
Compressing and connect, cushion block plays adjustment and connects elasticity and the effect of stability.Further, between flap and spool chamber entirety medial wall
Being provided with fairlead, the upper end of fairlead is provided with fairlead platen, in fairlead platen is formed by lock nut and fairlead
External screw thread connects, and flap can slide vertically in fairlead.Above-mentioned fairlead platen is possible to prevent fairlead to depart from easily to set
Fixed position, thus enhance the stability of internal mechanism motion.Above-mentioned flap is perfect with being applied in combination of its guider
The executive capability of functional device itself.
In order to strengthen the stability that valve body is connected with valve gap, it is ensured that valve entirety reaches the antidetonation of relevant criterion, modularity
Requirement, the valve gap of this programme connects end inwall and is provided with female thread, and valve body spool chamber outer wall is provided with external screw thread, and valve gap connects end
It is connected formation fixing seal with valve body spool chamber outer wall by the internal and external threads that female thread and external screw thread are formed to be socketed.Above-mentioned valve body
Threadeding of using with valve gap meets shockproof requirements and the system modular requirement of valve in nuclear power projects.Further, originally
The valve gap of scheme connects the internal diameter internal diameter more than valve gap intrinsic valve gap spool chamber of end, and valve body spool chamber outer end screws in valve gap
Connect the well shoulder of the bottom that end is connected end with valve gap to pass through pad formation and push against and be tightly connected.Based on above-mentioned threaded side
The sealing function of formula bonding pad makes seismic stability and the seal that the connection of valve body and valve gap has in structure.Meanwhile,
The closure overall in order to ensure spool chamber, this programme inside the exit passageway adjusting bottom the screw rod other end and valve gap between set
Having filler, be provided with hold-down grid outside exit passageway, hold-down grid is by being nested in the filler pressing sleeve adjusted on the screw rod other end
Compressing described filler, the locking mechanism that hold-down grid is formed by stud, nut is fixed in valve gap bottom outside, such as Fig. 1 institute
Show, specifically stud through the tapped through hole on hold-down grid with bottom valve gap on tapped blind hole formation internal and external threads be connected,
Nut check is above-mentioned threaded, is provided with packing ring therebetween, plays the effect being stably connected with.
This programme uses valve rod and screw combinations to use, and forms elasticity connection between the two and sets to the adjustment opening pressure
A fixed interval adjusted so that the regulation of pressure can be realized in the whole stroke section of spring normal elasticity deformation.
So that stable above-mentioned elastic connect can be formed between valve rod, adjustment screw rod and spring three, the valve rod of this programme another
Being equipped with lower spring cup on end, spring housing is located on the valve rod other end and is connected with lower spring cup formation elastic stress, adjusts screw rod
One end is tubular blind shaft structure, and the entrance lateral wall of above-mentioned tubular blind shaft structure is equipped with upper spring seat, and the valve rod other end is worn
Crossing the partial insertion above-mentioned tubular blind shaft structure of spring, the spring other end forms elastic stress with upper spring seat and is connected.Adjust spiral shell
Bar applies different pressure to spring, changes the valve rod other end and enters the degree of depth of above-mentioned tubular blind shaft structure, in order to balance blind shaft
Interior air pressure, simplifies the numerical relation between pressure change and camber of spring, and this programme is also in above-mentioned tubular blind shaft structure
Bottom is provided with pressure release pore, and along with the turnover of the valve rod other end, the row of synchronization from pressure release pore of the air in blind shaft inhales, it is ensured that
Proportionate relationship between pressure and spring deformation, simplifies the calculation of regulation pressure.
In order to ensure to adjust screw rod and adjust the stability that between bolt and nut, internal and external threads coordinates, prevent because vibration causes spiral shell
Stricture of vagina combines and runs pine, thus deviates the force value of setting, and this programme is also provided with the parts preventing from loosening, and specifically adjusts screw rod spiral shell
It is additionally provided with stop nut on the adjustment screw rod other end above mother, rotates adjustment screw rod and screw stop nut to setting position
Prevent from adjusting screw bolt loosening.Further, in order to reduce because of external factor corrosion failure adjust the screw rod other end and on loosen
Nut, this programme is also covered with protective cover on adjustment bolt and nut, and the protection of protective cover sealing cover is provided with the adjustment spiral shell of stop nut
The bar other end.
The pressure-adjustable lift check valve of this programme mainly by valve body 1, flap 2, cushion block 3, fairlead 4, locking nut 5,
Lower spring cup 6.1, upper spring seat 6.2, spring 7, valve gap 10, valve rod 9, adjustment screw rod 11, filler 13, filler pressing sleeve 14, filler
Pressing plate 15, support 16, adjustment bolt and nut 17, stop nut 19, protective cover 18 form.Valve opening and closing parts mainly by flap 2,
Cushion block 3, lower spring cup 6, valve rod 9 form.Valve is after pressure exceedes starting differential pressure setting, and valve opening and closing parts are lifted off a seat
12 move upwardly together the medium proper flow in Open valve makes pipeline.When the pressure medium in pipeline drops to setting
After, valve opening and closing parts move downwardly together and make flap 2 return to origin-location, valve closing.When the medium in pipeline flows backwards,
This valve plays blocking effect.Level pressure adjusting means is mainly by valve gap 10, adjustment screw rod 11, filler 13, filler pressing sleeve 14, filler
Pressing plate 15, support 16, adjustment bolt and nut 17, stop nut 19 form, and when the starting differential pressure setting of system becomes big, rotate
Adjust screw rod 11 to be allowed to move down, increase amount of spring compression, when the starting differential pressure setting of system diminishes, rotate and adjust spiral shell
Bar 11 is allowed to move up, and reduces amount of spring compression, thus plays the effect adjusting starting differential pressure.
General check-valves, to opening pressure not requirement, does not has particular requirement to emission flow yet.General relief valve does not has
There is check function, and check-valves does not has the function of relief valve requirement yet.This valve is mainly for " when intrasystem pressure reaches rule
During fixed unlatching pressure, valve opening gives off specified flow." and manufacture and design, play and system is carried out safeguard protection work
With, preventing the medium in pipeline from flowing backwards is only a subsidiary function, and it is a kind of multi-functional valve.Therefore, the master of this valve
The function is wanted to be: a) when intrasystem pressure reaches the unlatching pressure of regulation, valve opening gives off specified flow；B) prevent
Medium in pipeline flows backwards.
The pressure-adjustable lift check valve of this programme uses pressure-adjustable lift valve core device to change the critical of valve opening
Force value, the executive capability of functional device itself that employing flap guider is perfect, use screw thread at valve body with valve cover chamber
Connected mode meets particular valve shockproof requirements and system modular requirement in nuclear power projects, uses valve rod and adjusts screw rod two
The scheme of level transmission is provided the pressure regulation interval of elastic telescopic deformation stroke can be realized VOP by intermediary spring
Controlling, anti-seismic performance is good, is quick on the draw, safe and reliable, and the scheme using stop nut to be combined with its protective cover enhances mechanism
Stability and the performance of anti-external disturbance.Based on above feature, the pressure-adjustable lift check valve of this programme is compared existing
Scheme has substantive distinguishing features and progress.
The pressure-adjustable lift check valve of this programme is not limited to the content disclosed in detailed description of the invention, goes out in embodiment
Existing technical scheme can be with individualism, it is also possible to mutually comprise, and those skilled in the art combine common knowledge according to this programme
The simple alternative made falls within the scope of this programme.
Claims (10)
1. a pressure-adjustable lift check valve, is characterized in that including valve body, valve gap and pressure-adjustable lift valve core device, described
Valve body includes valve inlet end, valve export end and valve body, is provided with body cavity, described body cavity bag in described valve body
Include medium conveyor chamber and valve body spool chamber, be provided with medium pilot passage bottom described medium conveyor chamber, at the bottom of described medium conveyor chamber
Being provided with valve seat at portion and described medium pilot channel connection, the elongated end of described medium pilot passage is with described valve inlet end even
Logical, described valve export end connects with described medium conveyor chamber, and described valve gap includes that valve gap connects end and valve gap body, described valve
This internal valve gap spool chamber that is provided with of lid, described valve gap connects end fixing seal by described valve gap and is set in described valve body spool chamber
The spool chamber forming inside on outer wall is overall, and described pressure-adjustable lift valve core device includes flap and resilient push device, institute
Stating resilient push device include valve rod and adjust screw rod, described flap is pushed against and is pressed on described valve seat by one end of described valve rod
Blocking described medium pilot passage, the other end of described valve rod is connected with one end elastic stress of spring, another of described spring
End is connected with one end elastic stress of described adjustment screw rod, the other end of described adjustment screw rod from the bottom pass-out of described valve gap and
The pressure regulating device of described spool chamber integral outer connects, and described pressure regulating device includes adjusting bolt and nut and adjusting bolt and nut propping up
Frame, described adjustment bolt and nut support is fixed in described valve gap bottom outside, and described adjustment bolt and nut is fixed on described tune
On whole bolt and nut support, the described adjustment screw rod other end forms internal and external threads with described adjustment bolt and nut and is connected；By rotation
The liquid turning the stress state described valve inlet end of adjustment in the described adjustment screw rod other end described spring of change lifts described
Pressure needed for flap.
Pressure-adjustable lift check valve the most according to claim 1, it is characterised in that described flap is a tubular structure,
The blind end of described tubular structure is pressed on described valve seat and blocks described medium pilot passage, in the opening of described tubular structure
Being inserted with described valve rod one end in chamber, described valve rod one end is compressed even by cushion block with the bottom of described tubular structure open lumen
Connect.
Pressure-adjustable lift check valve the most according to claim 2, it is characterised in that described flap is whole with described spool chamber
Being provided with fairlead between internal sidewall, the upper end of described fairlead is provided with fairlead platen, and described fairlead platen is by locking
Nut forms internal and external threads with described fairlead and is connected, and described flap can slide vertically in described fairlead.
Pressure-adjustable lift check valve the most according to claim 1, it is characterised in that set on described valve gap connection end inwall
Having female thread, described valve body spool chamber outer wall to be provided with external screw thread, described valve gap connects end and leads to described valve body spool chamber outer wall
The internal and external threads crossing described female thread and external screw thread formation connects formation fixing seal socket.
Pressure-adjustable lift check valve the most according to claim 4, it is characterised in that the internal diameter that described valve gap connects end is big
In the internal diameter of described valve gap intrinsic valve gap spool chamber, described valve body spool chamber outer end screws in described valve gap and connects end with described
The well shoulder of the bottom of valve gap connection end is formed to push against by pad and is tightly connected.
Pressure-adjustable lift check valve the most according to claim 1, it is characterised in that be equipped with on the described valve rod other end
Lower spring cup, described spring housing is located on the described valve rod other end and is connected with described lower spring cup formation elastic stress, described tune
Whole screw rod one end is tubular blind shaft structure, and the entrance lateral wall of described tubular blind shaft structure is equipped with upper spring seat, described valve
The bar other end is through tubular blind shaft structure described in the partial insertion of described spring, the described spring other end and described upper spring seat shape
Elastic stress is become to connect.
Pressure-adjustable lift check valve the most according to claim 6, it is characterised in that the bottom of described tubular blind shaft structure
It is provided with pressure release pore.
Pressure-adjustable lift check valve the most according to claim 1, it is characterised in that the described adjustment screw rod other end and institute
It is provided with filler between stating inside the exit passageway bottom valve gap, outside described exit passageway, is provided with hold-down grid, described hold-down grid
Compressing described filler by the filler pressing sleeve being nested on the described adjustment screw rod other end, described hold-down grid passes through stud, spiral shell
Female locking mechanism formed is fixed in described valve gap bottom outside.
Pressure-adjustable lift check valve the most according to claim 1, it is characterised in that above described adjustment bolt and nut
It is additionally provided with stop nut on the described adjustment screw rod other end, rotates described adjustment screw rod and screw described locking spiral shell to setting position
Mother prevents described adjustment screw bolt loosening.
Pressure-adjustable lift check valve the most according to claim 9, it is characterised in that described adjustment bolt and nut upper cover
Being provided with protective cover, the protection of described protective cover sealing cover is provided with the described adjustment screw rod other end of described stop nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620664675.0U CN205824299U (en) | 2016-06-29 | 2016-06-29 | A kind of pressure-adjustable lift check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620664675.0U CN205824299U (en) | 2016-06-29 | 2016-06-29 | A kind of pressure-adjustable lift check valve |
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| Publication Number | Publication Date |
|---|---|
| CN205824299U true CN205824299U (en) | 2016-12-21 |
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ID=57566323
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620664675.0U Active CN205824299U (en) | 2016-06-29 | 2016-06-29 | A kind of pressure-adjustable lift check valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN205824299U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110848444A (en) * | 2019-12-13 | 2020-02-28 | 鞍山电磁阀有限责任公司 | Valve core assembly and safety valve |
-
2016
- 2016-06-29 CN CN201620664675.0U patent/CN205824299U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110848444A (en) * | 2019-12-13 | 2020-02-28 | 鞍山电磁阀有限责任公司 | Valve core assembly and safety valve |
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