CN109386723A - Freely half floating ball rotates stema-trap for overheat - Google Patents
Freely half floating ball rotates stema-trap for overheat Download PDFInfo
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- CN109386723A CN109386723A CN201710651081.5A CN201710651081A CN109386723A CN 109386723 A CN109386723 A CN 109386723A CN 201710651081 A CN201710651081 A CN 201710651081A CN 109386723 A CN109386723 A CN 109386723A
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- ball
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- 238000007667 floating Methods 0.000 title claims abstract description 99
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 80
- 230000009471 action Effects 0.000 claims abstract description 10
- 230000005484 gravity Effects 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 8
- 229910000531 Co alloy Inorganic materials 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 claims description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 238000005538 encapsulation Methods 0.000 claims 1
- 229920006395 saturated elastomer Polymers 0.000 abstract description 6
- 238000010338 mechanical breakdown Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 18
- 229920003266 Leaf® Polymers 0.000 description 16
- 230000002441 reversible effect Effects 0.000 description 14
- 230000000694 effects Effects 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000004781 supercooling Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000032696 parturition Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
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- 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
- F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
- F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
- F16T1/02—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers with valves controlled thermally
- F16T1/08—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers with valves controlled thermally by bimetallic strips or plates
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- 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
- F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
- F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
- F16T1/20—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers with valves controlled by floats
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- 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
- F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
- F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
- F16T1/38—Component parts; Accessories
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Temperature-Responsive Valves (AREA)
Abstract
Half floating ball of a kind of freedom disclosed by the invention rotates stema-trap for overheat, it is desirable to provide a kind of mechanical breakdown probability is small, the steam trap of sealed reliable, resistance to overheat.The technical scheme is that: the check-valve ball for only allowing steam to flow into valve body type chamber along transmitting tube passage with condensed water is equipped at the top of transmitting tube, under the conditions of superheated steam, check-valve ball falls by self gravity closes transmitting tube passage, and superheated steam is prevented to enter valve body type chamber and the intracavitary medium back flow of valve body type；Condensed water in high temperature and steam stream are fashionable, bimetal leaf generates thermal deformation, limit film limitation bimetal leaf depth of camber and deformation direction in the middle part of valve deck type cavity wall are set, bimetal leaf is under the position-limiting action of limit film, depth of camber reduces, Direction distortion beside to valve nozzle, half floating ball and valve nozzle contact free, no longer open half floating ball.The present invention solves the disadvantages that half float ball type steam drain valve can only operate under conditions of saturated vapor, and cannot work under the conditions of superheated steam.
Description
Technical field
The present invention relates to one kind to be suitable on steam heating equipment and steam pipework, can exclude condensed water automatically, prevents to steam
Vapour leakage, and the drain valve of energy automatically removing air.
Background technique
In the prior art, the various types of drain valve, the performance having nothing in common with each other.Drain valve is wanted can " identification " steam and condensation
Water can just play the role of block steam and drain water." identification " steam and condensed water are based on three principles: density contrast, temperature difference and phase transformation.
Then just produced according to three principles be classified as mechanical type, heat static force type, heat power type three types drain valve.Heat is quiet
Power type includes bellows-type, dual metal type, bellows-type, diaphragm type, wax formula etc..Mechanical type be also referred to as float-type be using condensed water with
The density contrast of steam is changed by condensed water liquid level, is made float lifting that flap be driven to open or close, is reached block steam and drain water mesh
's.Heat static force type is the drain valve realized using the temperature difference of condensed water and steam；Heat power type include disc type, pulsed,
Orifice-plate type etc. is to act by the variation of the thermodynamic property of liquid, utilizes the drain valve of the phase transformation of condensed water and steam.
There is a movable valve plate in thermodynamic trap, is both position-sensing unit and movement executive item.Passed through according to steam and condensed water
When flow velocity and volume change different thermodynamic principles, so that valve block is generated different pressure differences up and down, drive valve block controlled valve.Leakage
Vapour rate 3%, degree of supercooling are 5 DEG C -8 DEG C.When device starting, there is cooling condensed water in pipeline, and condensed water pushes valve open by operating pressure
Piece discharges rapidly.When condensed water discharge finishes, steam is then discharged, and because steam is bigger than the volume of condensed water and flow velocity, makes valve block
Pressure difference is generated up and down, and valve block is closed rapidly under the suction of steam flow rate.When valve block is closed, valve block is by two surface pressures, valve
Forced area below piece is less than forced area above, because the source pressure inside drain valve steam chest is in steam pressure, so
Stress is greater than in the following, valve block is closed tightly above valve block.Steam cooling inside drain valve steam chest is at condensed water, steam chest the inside
Pressure disappear.Condensed water pushes valve block open by operating pressure, and condensed water continues to discharge again, cycle operation, interruption draining.Heat power
Type drain valve using effect is generally undesirable, and due in structure and on operating principle, water, vapour are arranged together, malfunction
Make it is more, in the absence of water also can steam discharge, cause the wastes for largely giving birth to steam, slip is easy to damage 6%~10%, makes
It is short with the service life.And some mechanical type drain valve (such as full floating ball of double-valve-seat lever), also because of the reason in structure, two valve seats are simultaneously
Sealing is relatively inaccessible to, and steam is caused to leak, and slip is generally 3%~6%.But the degree of supercooling of mechanical type drain valve is small, condensed water
Discharge capacity is big, and heating equipment can be made to reach best heat exchange efficiency.Maximum rate of back pressure is 80%, meets condensate return system high back pressure
Operating condition, be the optimal drain valve of production technology heating equipment.By the variation of condensed water liquid level in steam trap
And the mechanical type drain valve acted generally includes: float is closed hollow ball Free Float Type Steam Trap, wherein again including freely
Free Float Type Steam Trap and lever floating ball type draining valve；Float is the open upward floating water drain valve of barrel shape of opening upwards, i.e., just
Bucket type drain valve；Float is the open downward floating water drain valve of barrel shape that Open Side Down, including inverted bucket trap and half
Free Float Type Steam Trap.Half Free Float Type Steam Trap is one of most reliable drain valve of working performance in mechanical type drain valve.It interior
The ball bucket of only one half float-ball type of portion's structure is movable part, opening down, ball bucket collection float, the reinforcing thick stick of free floating
In one, ball bucket is both opening and closing element and sealing element for thick stick, flap three zones.Entire spherical surface all can be sealing surface, not concentrate
Abrasion, is resistant to water hammer, without vulnerable part, long service life, due to the water seal effect that the condensed water around valve nozzle generates, no steam
Leakage, energy-saving effect are good.Rate of back pressure is greater than 80%, can arrange the condensed water lower than 2~3 DEG C of saturation temperature, not deposit in heating equipment
Water can make heating equipment reach best heat exchange efficiency.When starting, air and low-temperature condensate in pipeline enter by transmitting tube
In drain valve, the bimetal leaf emptying element in valve is not up to deformed movement temperature at this time, half floating ball is opened, valve is in and opens
State is opened, air and low-temperature condensate are discharged rapidly.When steam enters in ball bucket, form vapor chamber in ball bucket, ball bucket generate to
Buoyancy, while the temperature in valve increases, bimetal leaf empties deformed element and shrinks, and ball bucket pressure difference is bonded with valve nozzle, valve
It closes.A gas vent is provided on ball bucket, when some vapor in ball bucket constantly escapes and condense change from the gas vent on ball bucket
At condensed water, the vapor chamber volume in ball bucket reduces, and corresponding ball bucket buoyancy becomes smaller, since gravity makes ball bucket fall, valve
Door is opened, and condensed water is discharged rapidly.When steam enters back within ball bucket, valve is turned off, repetitive cycling work.Reverse bucket type is dredged
Be inside water valve a reverse bucket be liquid level position-sensing unit, Open Side Down for well-bucket, reverse bucket connect lever drive valve core be opened and closed valve.
Inverted bucket trap energy air-discharging, is not afraid of water attack, and antifouling property is good.Degree of supercooling is small, leaks vapour rate less than 3%, maximum rate of back pressure is
75%, connector is relatively more, and sensitivity is not so good as freely half Free Float Type Steam Trap, and valve clack sealing surface contact position is due to fixation
It is constant, it is easy to produce concentration abrasion and reduces service life.When device just starts, air and low-temperature condensate in pipeline enter
In drain valve, reverse bucket drops by own wt, and reverse bucket connects lever and drives valve core Open valve, air and low-temperature condensate
Discharge rapidly.When steam enters in reverse bucket, to buoyancy, reverse bucket rises connection lever and drives valve the steam generation of reverse bucket
The heart closes valve.A gas vent is provided on reverse bucket, when a part of steam is discharged from gas vent, another part steam generation condenses
Water, reverse bucket loss of buoyance, by own wt to sinking, reverse bucket connects lever and drives valve core Open valve, cycle operation,
Disconnected draining.It is dredged since half float ball type steam drain valve absorbs inverted bucket trap and inclined seat type free floating ball type in design
The characteristics of water valve, replaces open keg float with half floating ball.There are two the valves being isolated for the combined type stema-trap for overheat of the prior art
Chamber, You Lianggen stainless steel tube are connected to upper lower valve chamber, it is the combination by float-ball type and inverted bucket trap.When condensed water enters
The floating ball of lower valve chamber, secondary valve rises with liquid level, and floating ball closes steam inlet pipe hole.Condensed water rises to main valve chamber through penstock,
Well-bucket drops by self weight, and valve core is driven to open main valve, discharges condensed water.When the decline of the condensed water liquid level of secondary valve chamber, floating ball
Decline with liquid level, secondary valve is opened.Steam enters in the reverse bucket in upper main valve chamber from steam inlet pipe, and reverse bucket generates upward float
Power, reverse bucket drive valve core to close main valve.When the condensed water liquid level of secondary valve chamber increases again, next cycle period is opened again
Begin, interruption draining.Existing half Free Float Type Steam Trap disadvantage is that, only in the environment of saturated vapor inside half floating ball
Under, vapor chamber could be formed in half floating ball, is around condensed water, and half floating ball is floated, and drain valve works normally, when steam is
When superheated steam, it is difficult to be condensed into condensed water in time, leads to that the vapor chamber for being condensed water encirclement cannot be formed in half floating ball, do not have
Buoyancy, half floating ball cannot close valve nozzle and valve invalidation caused to leak.
Summary of the invention
The purpose of the present invention in view of the deficiencies of the prior art mentioned above, provides that a kind of mechanical breakdown probability is small, and sealing can
Lean on, resistance to thermal effect of crossing it is good, not only can be in saturated vapor but also the steam trap that can be used under superheated steam environment.
The purpose of the present invention can be reached by the following measures.A kind of half floating ball of freedom rotation stema-trap for overheat,
With an opening up ball bucket valve body 1, it is formed with the valve deck 2 of valve nozzle 5, the bimetal leaf on 2 type cavity wall of valve deck is set
3, and be assemblied in valve body, half floating ball 4 directed downwardly is opened in the intracavitary assembly of type that valve deck is formed, protrude into half floating ball, 4 channel
Transmitting tube 8 and its transmitting tube be located at the blanking cover 11 of 8 lower end of transmitting tube, it is characterised in that: transmitting tube 8 is vertically fixed on out
On the valve body cavity bottom platform of mouth upward, half floating ball 4 rotates freely on the top of transmitting tube 8；Position is equipped at the top of transmitting tube 8
It sink on stepped hole below plug screw 7, steam is only allowed to flow into the check-valve ball of valve body type chamber along transmitting tube passage with condensed water
9, under the conditions of superheated steam, the check-valve ball 9 on 8 channel of transmitting tube falls by self gravity, and closing transmitting tube 8 is logical
Road prevents superheated steam from entering valve body type chamber and the intracavitary medium back flow of valve body type；Condensed water in high temperature and steam stream are fashionable, bimetallic
Piece 4 generates thermal deformation under high temperature action, and the limit film 13 in the middle part of 2 type cavity wall of valve deck is arranged in and limits 3 warpage of bimetal leaf
Height and deformation direction, under the position-limiting action of limit film 13, depth of camber reduces bimetal leaf 3, becomes to 5 side direction of valve nozzle
Shape, half floating ball 4 and 5 contact free of valve nozzle, no longer open half floating ball 4.
The present invention is compared and is had the advantages that with the prior art
1. mechanical breakdown probability is small.The present invention is equipped with check-valves on the lower end stepped hole in 8 channel radial communication hole of transmitting tube
Ball 9, vapor stream can only be flowed along water inlet, cannot be flowed back along water outlet.Rotatable half floating ball 4, collection flap, reinforcing
Lever, float three act on greatly one, and without linkage, the probability that mechanical breakdown occurs for valve is greatly decreased.Using thin
The rule of high back pressure rate and condensed water in high temperature variable density when water, the flowing of vapour two-phase fluid in pipeline after water valve valve, will be high
Warm condensed water is transported to boiler room softened water tank or other processes that need to use hot water without pump back pressure automatic lifting.
2. sealed reliable, resistance to thermal effect excessively are good.The present invention uses the lower end step in 8 channel radial communication hole of transmitting tube
Check-valve ball 9 is equipped on hole, steam can only flow into valve body type chamber along transmitting tube passage with condensed water, as condensation water flow is complete,
Check-valve ball 9 leans on gravity fall, closes 8 channel of transmitting tube, and water inlet is closed, and superheated steam cannot be introduced into valve body type chamber, in addition
Reprocessing forming valve nozzle 5 after austenitic stainless steel built-up welding cobalt-base alloys, it is high that valve nozzle seals surface hardness, more resistant, wash away and rotten
Erosion, uses the leakproofness and service life for greatly improving product in the hot environment of superheated steam.Using being freely rotatable
Half floating ball, greatly reduces the concentration abrasion of half floating ball 4 as flap, and sealing effect is good.Hemisphere float is move freely.Work
Make upper and lower and spin motion when making, valve spherical surface and water discharge nozzle random seal in opening-closing process have dispersed the abrasion of spherical surface,
It ensure that the extra long life of the valve.Hemisphere float be it is downwardly open, be not afraid of " water attack ".Hemisphere float is always in water seal state
Lower work ensure that the ultralow leakage vapour rate of valve.Valve degree of supercooling is small, draining is smooth, substantially increase gas utilization unit temperature rise rate and
The thermal efficiency.
3. can be used under superheated steam environment.The present invention assembles check-valve ball 9 in 8 channel of transmitting tube, emits tube top
Assemble plug screw 7 in portion.Under the conditions of superheated steam, the check-valve ball in transmitting tube falls by self gravity, closing transmitting tube passage,
It prevents superheated steam from entering valve inner, the intracorporal condensed water of valve is avoided to generate secondary flash, therefore half floating ball has always buoyancy, no
It can fall, keep sealing valve nozzle.When drain valve is not started to work, half floating ball of free style sinks on expelling plate, at drain valve
When hull-borne, steam injects valve body by filter screen and transmitting tube, when vapour volume increase to a certain extent when, buoyancy makes
Half floating ball floats, and under steam pressure effect, half floating ball is closed close to drain valve valve nozzle, prevents steam to escape, when big
When amount condensed water enters valve body, vapour volume is reduced in half floating ball, and half floating ball is acted in own wt and being fallen, and half floating ball, which is detached from, to be dredged
Water valve valve nozzle completes a working cycles.Then it moves in cycles, plays the purpose of Auto-drainage exhaust.To solve
Half float ball type steam drain valve can only operate under conditions of saturated vapor, and the lacking under the conditions of superheated steam that cannot work
Point has effectively widened the working range of half float ball type steam drain valve.
The present invention not only can be used in saturated vapor pipe network and equipment, but also can be used in superheated steam pipe network and equipment,
The valve that condensed water, air and other incondensable gases can be automatically drained out, and steam is prevented to leak is not only saturated vapor work
The operating condition of condition, superheated steam is equally applicable.
Detailed description of the invention
In order to be further described rather than limit above-mentioned implementation of the invention, with reference to the accompanying drawing to the present invention make into
One step explanation, but therefore do not limit the present invention among the range.It is public that all these designs should be regarded as institute of the invention
The content and protection scope opened.
Fig. 1 is freely half floating ball rotation stema-trap for overheat internal structure cross-sectional view of the invention.
In figure: 1 ball bucket valve body, 2 valve decks, 3 bimetal leafs, 4 half floating balls, 5 valve nozzles, 6 gaskets, 7 plug screws, 8 transmitting tubes, 9
Check-valve ball, 10 expelling plates, 11 blanking covers, 12 filter screens, 13 limit films.
Specific embodiment
Refering to fig. 1.In the embodiment described below, a kind of half floating ball of freedom rotates stema-trap for overheat, half floating ball
Formula steam trap absorbs the characteristics of inverted bucket trap and inclined seat type loose float trap in design, floating with half
Ball replaces open keg float.The valve deck 2 that it has an opening up ball bucket valve body 1, is formed with valve nozzle 5, is arranged on valve deck 2
Bimetal leaf 3, and it is assemblied in downward opening half floating ball 4 of valve body, the intracavitary assembly of type that valve deck is formed, it is floating to protrude into described half
The plug screw 7 assembled at the top of transmitting tube 8 and its transmitting tube in 4 channel of ball, the blanking cover 11 positioned at 8 lower end of transmitting tube.Half is floating
Ball 4 collects flap, reinforcing lever, float three and acts on one greatly.It is filled on the lower end stepped hole in 8 channel radial communication hole of transmitting tube
Equipped with check-valve ball 9, steam can only flow into valve body type chamber along transmitting tube passage with condensed water, as condensation water flow is complete, check-valves
Ball 9 leans on gravity fall, closes 8 channel of transmitting tube, and superheated steam cannot be introduced into valve body type chamber.Transmitting tube 8 is vertically fixed on described
On 1 cavity bottom platform of ball bucket valve body.Gasket 6 is equipped between ball bucket valve body, valve deck 2.Half floating ball 4 passes through opening and closing valve nozzle
5 bypass to be connected to or close the oblique cutting of valve deck connection lid chamber.5 shaft end seal surface build-up welding of valve nozzle has cobalt-based alloy layer.Valve nozzle uses
Reprocess forming after austenitic stainless steel built-up welding cobalt-base alloys, it is high that valve nozzle seals surface hardness, and it is more resistant, wash away and corrode,
The leakproofness and service life for greatly improving product are used in the hot environment of superheated steam.
It is equipped with expelling plate 10 between the 1 cavity bottom protrusion platform of Step Shaft and ball bucket valve body of the fixing end of transmitting tube 8,
Transmitting tube 8 protrudes into half floating ball, 4 cavity, and half floating ball 4 is rotated freely using half floating ball is freely rotatable on the top of transmitting tube 8.
It is equipped with the blanking cover 11 for being laterally assemblied in 1 cavity bottom of ball bucket valve body positioned at the lower section of 8 fixing end of transmitting tube, sets filtering in blanking cover 11
Net 12.Half floating ball 4 is formed with the gas vent that cold air and incoagulable gas can be discharged, and the gas vent face limit film 13.
Half floating ball (4) is formed with the gas vent that cold air and incoagulable gas can be discharged, and the gas vent face is located at valve deck 2
Limit film 13 below inner wall.Vapour system initial start stage, low-temperature condensate and cold air flow into half floating ball chamber by transmitting tube 8
In vivo, cold air and incoagulable gas are elegant to half floating ball, 4 cavity top, are discharged from the gas vent on half floating ball, 4 top.
For dual metal type drain valve when device just starts, there is low temperature cold condensate in pipeline, and bimetal leaf is open and flat, spool
Under the elastic force of spring, valve is in the open position.When condensate temperature increases gradually, bimetal leaf temperature-sensitive element starts curved
Song deformation, and spool is pushed to closed position.Before condensed water reaches saturation temperature, drain valve is begun to shut off.Bimetal leaf
With condensate temperature change control valve door switch, block steam and drain water.The present embodiment using bimetal leaf as temperature-sensing element this
Characteristic limits 3 depth of camber of bimetal leaf and deformation direction by limit film 13；Low-temperature condensate and cold air stream are fashionable, double
Sheet metal 3 keeps undeformed state to open half floating ball 4, fully opens valve nozzle, and low-temperature condensate and cold air are discharged rapidly.High temperature
Condensed water and steam stream are fashionable, and bimetal leaf 4 generates thermal deformation under high temperature action, double gold under the position-limiting action of limit film 13
Belonging to piece depth of camber reduces, and to valve nozzle side Direction distortion, no longer opens half floating ball 4, half floating ball 4 and valve nozzle contact free.
When semi-suspended spherical trap valve starts, hemisphere float is sunk on transmitting station, and condensed water passes through under the action of inlet outlet pressure differential
Gas vent on strainer, launch tube flows into valve chamber, is finally discharged from water discharge nozzle.After steam enters, coagulated in hemisphere float
It bears water and is extruded, suffered buoyancy is cumulative, forces it to float and coincide with water discharge nozzle, and drain valve is in resistance vaporous state.In the present invention,
Vapour system initial operating stage, half floating ball are still on expelling plate 10, and low-temperature condensate and cold air pass through the inflow valve of transmitting tube 8
It is interior.Outside by 5 dump valve of valve nozzle.With the inflow of condensed water in high temperature and steam, vapor stream forms quilt in half floating ball, 4 cavity
Condensed water surrounds vapor chamber, and half floating ball 4 is generated to buoyancy, closes valve nozzle 5.When half floating ball 4 floats, expelling plate 10 is to half floating ball
4 movement keeps optimum angle, guarantees that the sphere of half floating ball 4 and 5 single-point of valve nozzle seal and intracavitary two, 2 type of valve deck are oriented to
The two point of slot is oriented to tight seal, so that the movement of half floating ball is more reliable, seals tighter.Half floating ball, 4 top is formed with gas vent,
Vapour system initial start stage, low-temperature condensate and cold air are flowed into half floating ball cavity by transmitting tube 8, cold air and incoagulability
Gas is elegant to half floating ball, 4 cavity top, is discharged from the gas vent on half floating ball, 4 top.Limit film 13 plays limitation bimetal leaf 3
The effect of depth of camber and deformation direction, low-temperature condensate and cold air stream are fashionable, and bimetal leaf 3 is undeformed, and holding opens half
The state of floating ball 4, valve nozzle fully open, and low-temperature condensate and cold air are discharged rapidly, condensed water in high temperature and steam stream are fashionable, double
Sheet metal 3 generates thermal deformation under high temperature action, and under the position-limiting action of limit film 13,3 depth of camber of bimetal leaf is reduced, to
5 side Direction distortion of valve nozzle, no longer opens rotatable half floating ball 4, and half floating ball can be with valve nozzle contact free.
Claims (10)
1. a kind of half floating ball of freedom rotates stema-trap for overheat, there is an opening up ball bucket valve body (1), be formed with valve
Bimetal leaf (3) on valve deck (2) type cavity wall is arranged in the valve deck (2) of mouth (5), and be assemblied in valve body, valve deck is formed
Half floating ball (4) directed downwardly is opened in the intracavitary assembly of type, protrudes into the transmitting tube (8) in half floating ball (4) channel and its transmitting tube position
Blanking cover (11) in the transmitting tube (8) lower end, it is characterised in that: transmitting tube (8) is vertically fixed on opening up valve body type
In chamber bottom platform, half floating ball (4) rotates freely on the top of transmitting tube (8)；It is equipped at the top of transmitting tube (8) positioned at plug screw
(7) lower section is sunk on stepped hole, and steam is only allowed to flow into the check-valve ball (9) of valve body type chamber along transmitting tube passage with condensed water,
Under the conditions of superheated steam, the check-valve ball (9) being located on transmitting tube (8) channel falls by self gravity, closes transmitting tube (8)
Channel prevents superheated steam from entering valve body type chamber and the intracavitary medium back flow of valve body type；Condensed water in high temperature and steam stream are fashionable, double gold
Belong to piece (4) and generate thermal deformation under high temperature action, the limit film (13) being arranged in the middle part of valve deck (2) type cavity wall limits bimetallic
Piece (3) depth of camber and deformation direction, bimetal leaf (3) is under the position-limiting action of limit film (13), and depth of camber reduces, to valve
Direction distortion beside mouth (5), half floating ball (4) and valve nozzle (5) contact free, no longer open half floating ball (4).
2. freely half floating ball as described in claim 1 rotates stema-trap for overheat, which is characterized in that in transmitting tube (8)
The vertical motion that guaranteed half floating ball (4) is assembled between the Step Shaft and ball bucket valve body (1) cavity bottom boss of fixing end is kept
The expelling plate (10) of proper angle.
3. freely half floating ball as described in claim 1 rotates stema-trap for overheat, which is characterized in that half floating ball 4 floats
When, the movement of double of floating ball of expelling plate (10) (4) keeps optimum angle, guarantees that the sphere of half floating ball (4) and valve nozzle (5) are single
The two point of dot encapsulation and intracavitary two guide grooves of valve deck (2) type is oriented to tight seal.
4. freely half floating ball as described in claim 1 rotates stema-trap for overheat, which is characterized in that half floating ball (4) passes through
It opens and closes valve nozzle (5) Lai Liantong or closes the oblique cutting bypass of valve deck connection lid chamber.
5. freely half floating ball as described in claim 1 rotates stema-trap for overheat, which is characterized in that valve nozzle (5) shaft end
Sealing surface weld deposit has cobalt-based alloy layer.
6. freely half floating ball as described in claim 1 rotates stema-trap for overheat, which is characterized in that be located at transmitting tube (8)
The lower section of fixing end is equipped with the blanking cover (11) for being laterally assemblied in ball bucket valve body (1) cavity bottom, sets filter screen in blanking cover (11)
(12).
7. freely half floating ball as described in claim 1 rotates stema-trap for overheat, which is characterized in that half floating ball (4) is formed with
The gas vent of cold air and incoagulable gas can be discharged, and the gas vent face is located at the limit film below valve deck (2) inner wall
(13).
8. freely half floating ball as described in claim 1 rotates stema-trap for overheat, which is characterized in that half floating ball (4) top
Gas vent, vapour system initial start stage, low-temperature condensate and cold air is formed with to flow into half floating ball cavity by transmitting tube (8),
Cold air and incoagulable gas are elegant to half floating ball (4) cavity top, are discharged from the gas vent on half floating ball (4) top.
9. freely half floating ball as described in claim 1 rotates stema-trap for overheat, which is characterized in that limit film (13) limit
Bimetal leaf (3) depth of camber and deformation direction processed；Low-temperature condensate and cold air stream are fashionable, and bimetal leaf (3) keeps unchanged
Shape state opens half floating ball (4), fully opens valve nozzle, and low-temperature condensate and cold air are discharged rapidly.
10. freely half floating ball as described in claim 1 rotates stema-trap for overheat, which is characterized in that as high temperature condenses
The inflow of water and steam, vapor stream formed in half floating ball, 4 cavity is condensed water surround vapor chamber, half floating ball (4) generate to
Buoyancy is closed valve nozzle (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710651081.5A CN109386723B (en) | 2017-08-02 | 2017-08-02 | Free semi-floating ball rotary overheat steam drain valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710651081.5A CN109386723B (en) | 2017-08-02 | 2017-08-02 | Free semi-floating ball rotary overheat steam drain valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109386723A true CN109386723A (en) | 2019-02-26 |
| CN109386723B CN109386723B (en) | 2024-03-22 |
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|---|---|---|---|
| CN201710651081.5A Active CN109386723B (en) | 2017-08-02 | 2017-08-02 | Free semi-floating ball rotary overheat steam drain valve |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542013A (en) * | 2019-10-17 | 2019-12-06 | 荆门市中金铝业铸造有限公司 | Float type drain valve |
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| CN110542013A (en) * | 2019-10-17 | 2019-12-06 | 荆门市中金铝业铸造有限公司 | Float type drain valve |
| CN110542013B (en) * | 2019-10-17 | 2024-03-29 | 荆门市中金铝业铸造有限公司 | Floating ball type drain valve |
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| Publication number | Publication date |
|---|---|
| CN109386723B (en) | 2024-03-22 |
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