CN106247002B - Anti-freezing water hammer-resistant combined high-speed is vented intake valve - Google Patents

Abstract

The invention discloses a kind of Anti-freezing water hammer-resistant combined high-speeds to be vented intake valve, with valve body, valve deck, floating ball, floating ball cover, lifting cover, hood, it is characterized in that the larger annular air chamber of capacity is equipped in the periphery of air bleeding valve, so when the impact of water hammer wave that downstream generates is transmitted in valve, because air is elastomer, it is easily absorbed by compression, so as to eliminate the impact of water hammer；In addition, annular chamber is equivalent to a heat insulation layer, inner cavity water freezing can effectively prevent.The present invention also takes the multinomial measure for preventing or eliminating frost, can guarantee that gas vent reliably works and effectively prevent to influence the action of lifting cover due to frost.

Description

Anti-freezing water hammer-resistant combined high-speed is vented intake valve

Technical field

The present invention relates to a kind of intake and exhaust valve more particularly to Anti-freezing water hammer-resistant combined high-speed exhaust intake valves.

Background technology

In order to improve emptying effectiveness and prevent aqueduct because being damaged during negative pressure, combined high-speed exhaust intake valve （Hereinafter referred to as air bleeding valve）It is widely used in aqueduct road.Its major function is：During first water supply, carried out by big gas vent Rapid, high volume is vented, after Quick air-discharge, big vent closure；During normal water supply, the air contained in water accumulates to air bleeding valve top Portion with being raised and lowered for air pressure, is vented repeatedly by small de-air hole；When occurring negative pressure in aqueduct, such as have a power failure Or maintenance, when cutting off the water, big gas vent is opened rapidly, and outside air enters pipeline through air bleeding valve, eliminates negative pressure in pipe. CN200420103028X patents disclose it is a kind of at present using air bleeding valve that is commonplace, being classified as typical construction by national standard, but It is confirmed through using, this air bleeding valve still has following deficiency：1）Due to substantially full water in valve in the operating condition, Water hammer-resistant energy force difference when shut-off valve quick closedown after valve or the big gas vent quick closedown of supplying water for the first time generate water hammer, is easily made The damage parts weaker into floating ball equal strength；In addition it cannot be used in severe cold area, otherwise be expanded because water-ice freezes, cause valve body etc. Part ruptures；2）Unavoidably with trace impurity in the water of conveying, using with the passing of time accumulating in valve unavoidably, cause air bleeding valve leak or Small de-air hole blocks, and regular dismounting cleaning is again cumbersome, time-consuming.

Invention content

The present invention mainly solve the prior art present in deficiency, so as to develop it is a kind of can prevent frost, water can be eliminated The combined high-speed exhaust intake valve of hammering blow.

The above-mentioned technical problem of the present invention is mainly what is be addressed by following technical proposals：A kind of Anti-freezing water hammer-resistant Combined high-speed is vented intake valve, has valve body, valve deck, floating ball, floating ball cover, lifting cover, hood, it is characterised in that：Valve body Spacer is equipped between floating ball cover, the larger closed annular air of the capacity of air bleeding valve periphery is formed between spacer cylinder and valve body Chamber；The bonnet central is equipped with big gas vent, and there are upper and lower two circular pits of large and small diameter in bottom surface, and has several radial directions Drain tank；Impurity discharging mechanism is equipped with the connecting portion of lifting cover in the middle part of hood, can easily remove the row of accumulating at any time Dirt in air valve.

Technical scheme of the present invention can also be further perfect：

Preferably, valve body is lower end with the hollow valve casing of flange, middle part with cylinder, the diameter ratio of lower end water inlet The diameter of cylinder is small, and the flange of lower end is generally connected with the upper flange of bolt and service valve, on the lower flange and pipeline of service valve Flanged joint, connection heel row air valve verticality should control within 2 °.When overhauling air bleeding valve, service valve is closed, with The water exempted from pipeline sprays；Valve body upper surface circumferentially uniformly distributed several screw hole bolts and washer one by valve body, hood, Several sleeves, valve deck, gasket, spacer, floating ball cover are fastened together, and O-ring seals are preventing medium from leaking.

Preferably, hood is preventing from splashing around, and prevent dirt from entering from the water that big gas vent e sprays Air bleeding valve, is similar to the plate of a back-off, and the outer diameter of outer diameter Bi Fa Cover are big；Outer rim surrounding is drilled with several mounting holes, quantity, Size and distribution are consistent with the screw hole of 1 upper surface of valve body；Middle part is welded with tapped swivel nut；It is screwed in the internal thread of swivel nut There is the push rod with centre bore, push rod is usually adjusted to extreme higher position；The upper end of push rod is connected with handwheel.

Preferably, spacer, which is a lower end, has inlet opening, upper end has the hollow and thin-walled cylinder of flange, is clamped at Between the upper pit of valve deck and the upper surface of valve body；The flange outer diameter of upper end and the big pit outer diameter slide fit of valve deck bottom surface；Cylinder The outer diameter of top and the upper through-hole slide fit of valve body, and it is machined with the groove of installation O-ring seals；The through-hole diameter of upper end is than in it Chamber diameter is small, and there are upper and lower two annular grooves in the upper end of through-hole.According to requirement, spacer material can be metal or other Heat-barrier material, such as low tree of heat transfer coefficient etc.；The outer circle of spacer cylinder forms annular air chamber with the inner wall of valve body cylinder, uses To form closed, flexible, insulation air layer.

Preferably, floating ball cover is a upper end has bottom thin-walled cylinder with short side flange, upper flange is arranged on spacer In the lower groove of upper end, the through-hole slide fit of cylinder outer circle top and spacer upper end, and it is clamped at the recessed of gasket and spacer Between slot；Cylinder bottom is in spherical crown shape, the cushion pad with water inlet aperture is equipped in the hole of bottom center, to when floating ball hurtles down It is against damages；The wall of surrounding is equipped with several uniformly distributed louver(-vre)s above cylinder, between the outer wall of cylinder and the inner wall of spacer Form annular chamber.

Preferably, floating ball is cylinder of the upper and lower end with spherical crown, with stainless steel casing, proportion compares water It is small（Generally take 0.7-0.8）；Top is fixed with taper bolt, and the center line of taper bolt is consistent with the center line of floating ball；Floating ball, which moves, matches In the endoporus of floating ball cover, when the gap of the two can ensure that it to install verticality be 3 °, floating ball can be in the endoporus of floating ball cover on Under move freely.

Preferably, lifting cover is arranged on above floating ball, by the seal closure of slightly arc and welding in its center hole, and Perpendicular guide post group is into guide rod is moved in the endoporus for the push rod for fitting over hood center, can freely up and down be moved wherein It is dynamic；There are a radial hole and axial taper hole in lower end, and the taper of the taper bolt on axial taper hole and floating ball top is completely the same, and the two is close to match After can by moisture therein all squeeze out, leak or gas leakage can't occur；The upper end of guide rod is combined with nuts and washers, uses With the extreme lower position that lifting cover is controlled to fall.The relative position of guide rod and seal closure must assure that lifting cover in extreme lower position When, the outer rim of seal closure is in exhausting window slightly downward position below, in order to avoid influence exhaust.

Preferably, gasket is a flat annulus, be arranged on valve deck bottom surface small rut and spacer upper end it is upper It in groove, and is clamped at therebetween, the diameter of centre bore is equal to the diameter of big gas vent, the gradient and lifting cover of lower cone hole Seal closure gradient it is identical, the two forms the valve port of big gas vent.Gasket is made of hard rubber elastomeric material.

Present invention has the advantages that：

1）The larger annular air chamber of capacity is equipped in the periphery of air bleeding valve, in normal water supply, even if being filled in valve Water is expired, air is also filled in air chamber, will not have been captured by water, so when the impact of water hammer wave that downstream generates is transmitted in valve When, because air is elastomer, easily absorbed by compression, so as to eliminate the impact of water hammer；In addition, it is used in severe cold area When, since the annular air layer of periphery is equivalent to heat insulation layer, it can effectively prevent inner cavity water freezing, during special severe cold, even if The water freezing of inner cavity because air is easily compressed, will not rupture due to water-ice freezes and expands the parts such as valve body；

2）Take the multinomial measure for preventing or eliminating frost：For example, under the operating mode closed in normal water supply small de-air hole, Water in small de-air hole is all squeezed out；For another example, when being vented from large and small gas vent, a small amount of water always is carried over, the water taken out of It can be discharged by several drain tanks below valve deck, make to accumulate in the ponding pole that big gas vent is connect with lifting cover in pit It is small, and soon evaporated, therefore can effectively prevent the two due to frost " consolidation ", influence the action of lifting cover；For another example, ten thousand Both one is frozen " consolidation ", can depress the push rod in the middle part of hood, crushes frost；

3）Equipped with pollution discharge mechanism, the dirt accumulated in air bleeding valve can be easily removed at any time.

Description of the drawings

Attached drawing 1 is a kind of structure diagram of the present invention（State when anhydrous in valve）；

Attached drawing 2 is that the exhaust of Fig. 1 terminates state.

Reference sign：1st, valve body, 2, crash pad, 3, floating ball, 4, floating ball cover, 5, taper bolt, 6, spacer, 7, lifting Cover, 8, O-ring seals, 9, gasket, 10, valve deck, 11, sleeve, 12, hood, 13, bolt, 14, washer one, 15, handwheel, 16th, push rod, 17, nut, 18, washer two, 19, muff；

H1, annular air chamber, H2, annular chamber, H3, discharge chamber；

E, big gas vent, d, exhausting window, f, radial hole, c, water inlet aperture, a, water inlet, b, inlet opening, h , radial direction drain tank, g, axial taper hole.

Specific embodiment

Below with reference to the embodiments and with reference to the accompanying drawing technical scheme of the present invention is further described in detail.

Embodiment：

As shown in the figure, the present invention is by valve body 1, crash pad 2, floating ball 3, floating ball cover 4, taper bolt 5, spacer 6, lifting cover 7, O Shape sealing ring 8, gasket 9, valve deck 10, sleeve 11, hood 12, bolt 13, washer 1, handwheel 15, push rod 16, nut 17th, the parts such as washer 2 18 form；In addition to sleeve 11, bolt 13, washer 1, other each parts after mounting be located at it is same in On heart line.

Valve body 1 be lower end with the hollow valve casing of flange, middle part with cylinder, the diameter of lower end water inlet a is than cylinder Internal diameter is small, and the flange of lower end generally uses bolt and service valve（It is not drawn into figure）Upper flange connection, the lower flange of service valve with Respective flange connection on pipeline, the verticality of connection heel row air valve should be controlled within 2 °, when overhauling air bleeding valve, will be overhauled Valve is closed, in case the water in pipeline sprays；1 upper surface of valve body is circumferentially evenly distributed with 8-12 screw hole, with bolt 13 and washer 1 Valve body 1, hood 12, several sleeves 11, valve deck 10, gasket 9, spacer 6, floating ball cover 4 are fastened together, the sealing of O shapes 8 are enclosed to prevent medium from leaking.Muff 19 is made of the low elastic material of heat transfer coefficient.

Valve deck 10 is a flat annulus, and center is equipped with big gas vent e, several installations are machined on the end face of outer rim Hole, quantity, size, distribution are consistent with the screw hole on 1 upper surface of valve body；Bottom surface has upper and lower two annulars of large and small diameter recessed Hole, and have the radial direction drain tank h of 5 × 5mm of 4-6 items.

Spacer 6 is that a lower end has inlet opening b, and upper end has the hollow and thin-walled cylinder of flange, is clamped at valve deck 10 Upper pit and valve body 1 upper surface between；The flange outer diameter of upper end and the big pit outer diameter slide fit of 10 bottom surface of valve deck；On cylinder The outer diameter of side and the upper through-hole slide fit of valve body 1, and it is machined with the groove of installation O-ring seals 8；The through-hole diameter of upper end is than in it Chamber diameter is small, and there are two annular grooves up and down in the upper end of through-hole；According to requirements, 6 material of spacer can be metal or other Heat-barrier material, such as low resin of heat transfer coefficient etc..The outer circle of 6 cylinder of spacer forms annular air with the inner wall of 1 cylinder of valve body Chamber H1, to form closed, flexible, insulation air layer.

Gasket 9 is a flat annulus, is arranged on the upper groove of 6 upper end of small rut and spacer of 10 bottom surface of valve deck In, and be clamped at therebetween, the diameter of centre bore is equal to the diameter of big gas vent e, gradient and the lifting cover 7 of lower cone hole Seal closure gradient is identical, and the two forms the valve port of big gas vent.Gasket 9 is made of hard rubber elastomeric material.

Floating ball cover 4 is that a upper end has bottom thin-walled cylinder with short side flange, and upper flange is arranged under 6 upper end of spacer In groove, the through-hole slide fit of cylinder outer circle top and 6 upper end of spacer, and be clamped at gasket 9 and spacer 6 lower groove it Between；Cylinder bottom is in spherical crown shape, the cushion pad 2 with water inlet aperture c is equipped in the hole of bottom center, to when floating ball 3 hurtles down It is against damages；The wall of surrounding is equipped with 6 uniformly distributed louver(-vre) d above cylinder.Shape between the outer wall of cylinder and the inner wall of spacer 6 Circularize chamber H2.

Floating ball 3 is cylinder of the upper and lower side with spherical crown, with stainless steel casing, and proportion is smaller than water（Generally take 0.7-0.8）；Top is fixed with taper bolt 5, and the center line of taper bolt 5 is consistent with the center line of floating ball 3；Floating ball 3 is dynamic to fit over floating ball In the endoporus of cover 4, when the gap of the two can ensure that it is 3 ° to install verticality, floating ball 3 can be in the endoporus of floating ball cover 4 freely up and down It is mobile, it is not crooked not dead.

Hood 12 to prevent from splashing around, and prevent dirt from entering air bleeding valve from the water that big gas vent e sprays, It is similar to the plate of a back-off, and the outer diameter of outer diameter Bi Fa Cover 10 are big；Outer rim surrounding is drilled with 4-8 mounting hole, quantity, size It is consistent with the screw hole of 1 upper surface of valve body with being distributed；Middle part is welded with tapped swivel nut；Band is combined in the internal thread of swivel nut There is the push rod 16 of centre bore, push rod 16 is usually adjusted to extreme higher position；The upper end of push rod 16 is connected with handwheel 15.Hood 12 Cavity between Fa Cover 10 is discharge chamber H3.

Lifting cover 7 is arranged on the top of floating ball 3, by the seal closure of slightly arc and welding in its center hole and perpendicular Guide post group into guide rod is moved in the endoporus for fitting over push rod 16, can freely up and down be moved wherein；There is radial hole f in lower end With axial taper hole g, the taper of axial taper hole g and taper bolt 5 is completely the same, and the two is close match after can by moisture therein all squeeze Go out, leak or gas leakage can't occur；The upper end of guide rod is combined with nut 17 and washer 18, lifting cover 7 to be controlled to fall Extreme lower position.The relative position of guide rod and seal closure must assure that lifting cover 7 in extreme lower position, and the outer rim of seal closure exists Exhausting window d slightly downward positions below, in order to avoid influence exhaust.

Impurity excludes mechanism：

Inevitably contain trace impurity in the water of conveying, it with the passing of time must be with the presence of in partial product valve, to large and small gas vent（Radially Aperture）Harmful effect is caused, such as causes on sealing surface to leak or block small de-air hole, it is therefore desirable to periodically be carried out clear Reason.Method for cleaning is as follows：Handwheel 15 is rotated, declines push rod 16, until big gas vent e is opened, with the pressure of impurity in valve Power water is sprayed from big gas vent e；It cleans out, push rod 16 must be risen to extreme higher position by reverse phase rotation handwheel 15.This There is following two functions in mechanism：1）Just in case big gas vent is frozen, can be crushed with method；2）During first water supply sometimes It need to confirm in pipeline and whether be filled with water, at this point, then whether the guide rod for first confiring that lifting cover 7 drops in extreme higher position Lower push-rod 6 opens big gas vent e, if there is water is discharged, then can confirm and water has been had been filled in pipeline, because air bleeding valve is general Mounted on the peak of pipeline.

The operation principle of the present invention：

When anhydrous in valve（Fig. 1）, floating ball 3 is located at the bottom of floating ball cover 4, and lifting cover 7 is in extreme lower position, at this time circular cone Pin 5 is detached with the axial taper hole g of 7 guide rod lower end of lifting cover.It is supplied again to pipeline after first or pipe-line system is overhauled During water, a large amount of air enters floating ball cover 4 through service valve, water inlet a, inlet opening b, annular chamber H2, exhausting window d in pipeline It is interior, then quickly discharged by big gas vent e and discharge chamber H3.Since air bleeding valve is typically mounted at the peak of pipeline, Therefore after the air in pipeline empties, water is first filled with pipeline, then enters air bleeding valve by water inlet a；Due to annular empty Air cavity H1 be it is open downwards, when it is waterborne be raised to its lower mouth when, annular air chamber H1 becomes a closed gas chamber, therefore water It will not enter, so certain thickness annular air layer can be formed in the entire periphery of air bleeding valve；Water into valve Inner passes through Inlet opening b rises in annular chamber H2, while water enters 4 lower part of floating ball cover by aperture c of intaking, and floating ball 3 is in buoyancy Lower rising, taper bolt 5 and conical bore g it is closely sealed after drive lifting cover 7 rise together, until 7 lower end of lifting cover seal closure with Gasket 9 contacts, and closes big gas vent e under buoyancy, is water-tight;Moment before closing, the air in annular chamber H2 Also it has drained, and has allowed there is a small amount of water to be discharged from big gas vent e, the water of discharge passes through the sluicing on 10 lower face of valve deck Slot h is discharged；Simultaneously under buoyancy, taper bolt 5 and axial direction taper hole g are tightly pressed together, and the water in taper hole g is whole It squeezes out, and water-tight, air tight；So far Quick air-discharge terminates（Fig. 2）.When Quick air-discharge terminates, water-filling is completed, large and small（Radially Aperture）After vent closure, 3 top of floating ball remains partial air, this partial air is closed, and has certain pressure, Therefore in normal water supply, big gas vent e will not be opened.With the variation of temperature and pressure in water supply process, in water Air released by Buddhism, and to the Spatial Agglomeration of the top of floating ball 3,7 lower section of lifting cover, air pressure constantly increases, in valve under water level Drop, the buoyancy suffered by floating ball 3 also decreases, when the weight of floating ball 3 be more than suffered buoyancy with conical bore g upper end areas because During the sum of upwards thrust suffered by inside and outside differential pressure, floating ball 3 declines, small de-air hole（Warp-wise aperture）F is opened, and 3 top of floating ball has Body of calming the anger is discharged by axial taper hole g and inlet opening c；After body of calming the anger discharge, water level increases in valve, and floating ball 3 rises, It again will be small（Radial hole）Vent closure, such iterative cycles.Air takes a small amount of water out of unavoidably when being discharged from small de-air hole Point, if using traditional structure, water will accumulate in small（Radial hole）In gas vent, can cause in severe cold season Festival icing and It blocks small（Radial hole）Gas vent.The structure that the present invention uses is as previously mentioned, can be complete by the moisture accumulated in small de-air hole Portion squeezes out, therefore the failure blocked by frost will not occur.

When pipe drainage, negative pressure is generated in pipeline, water level declines rapidly in valve, and floating ball 3 falls back to the bottom of floating ball cover 4 Portion, lifting cover 7 fall back to minimum point, and big gas vent e is opened, and extraneous air is by the sequence opposite with during exhaust to pipeline Interior tonifying Qi, it is therefore prevented that pipeline is damaged when generating negative pressure.

As described above, because annular air chamber H1 is closed, water will not enter, this is equivalent to air bleeding valve by one The thicker annular air layer of layer is surrounded, it is elastomer, and is heat insulation layer, therefore the impact that energy Xi Shou Shui Hammer are generated Wave and make air bleeding valve from frost, if used in severe cold area, the low material of heat transfer coefficient can be used in spacer 6.In addition, from The water of large and small gas vent discharge can be discharged by several drain tank h；The water being retained in axial taper hole g can be complete Portion squeezes out, and can prevent large and small gas vent from freezing in this way, ensures that air bleeding valve reliably works.The present invention is used in severe cold area, It can Anti-freezing and waterproof hammer；If used in torrid areas, merely to water hammer-resistant, then in structure it is slightly modified just Row.

Claims (7)

1. a kind of Anti-freezing water hammer-resistant combined high-speed is vented intake valve, there is valve body（1）, valve deck（10）, floating ball（3）, floating ball Cover（4）, lifting cover（7）, hood（12）, it is characterised in that：Valve body（1）With floating ball cover（4）Between be equipped with spacer（6）, spacer （6）Cylinder and valve body（1）Between form the larger closed annular air chamber of capacity of air bleeding valve periphery（H1）；The valve deck （10）Center is equipped with big gas vent（e）, there are upper and lower two circular pits of large and small diameter in bottom surface, and has several radially to sluice Slot（h）；The floating ball（3）The taper bolt at top（5）With lifting cover（7）Guide rod lower end axial taper hole（g）Taper it is complete It is complete consistent；The hood（12）Middle part and lifting cover（7）Connecting portion be equipped with impurity discharging mechanism.

2. Anti-freezing water hammer-resistant combined high-speed according to claim 1 is vented intake valve, it is characterised in that：Spacer (6) It is that a lower end has inlet opening (b), upper end has the hollow and thin-walled cylinder of flange, is clamped at valve deck（10）Upper pit with Between the upper surface of valve body (1)；The cylinder external diameter and valve body of upper end（1）Upper through-hole slide fit, and be machined with installation O-ring seals （8）Groove；The through-hole diameter of upper end is smaller than its intracavity diameter, and there are upper and lower two annular grooves in the upper end of through-hole.

3. Anti-freezing water hammer-resistant combined high-speed according to claim 1 or 2 is vented intake valve, it is characterised in that：Floating ball Cover（4）It is that a upper end has bottom thin-walled cylinder, floating ball cover with short side flange（4）Upper flange be arranged on spacer（6）Upper end Lower groove in, cylinder outer circle top and spacer（6）The through-hole slide fit of upper end, and it is clamped at gasket（9）And spacer（6）'s Between lower groove；Cylinder bottom is in spherical crown shape, and band water inlet aperture is equipped in the hole of bottom center（c）Cushion pad（2）, in floating ball （3）It is against damages when hurtling down；The wall of surrounding is equipped with several uniformly distributed louver(-vre)s above cylinder（d）, the outer wall of cylinder With spacer（6）Inner wall between form annular chamber（H2）.

4. Anti-freezing water hammer-resistant combined high-speed according to claim 1 or 2 is vented intake valve, it is characterised in that：Floating ball （3）It is the cylinder that a upper and lower end carries spherical crown, proportion is smaller than water；Top is fixed with taper bolt（5）, taper bolt（5）In The heart and floating ball（3）Center line it is consistent；Floating ball（3）It is dynamic to fit over floating ball cover（4）Endoporus in, the gap of the two can ensure that its installation Verticality can be in floating ball cover when being 3 °（4）Endoporus in freely up and down move.

5. Anti-freezing water hammer-resistant combined high-speed according to claim 1 or 2 is vented intake valve, it is characterised in that：Lifting Cover（7）It is arranged on floating ball（3）Top, by the seal closure and welding of slightly arc in its center in hole, and perpendicular guiding Bar forms；Guide rod is moved in the endoporus for the push rod (16) for fitting over hood center, can freely up and down be moved wherein；There is diameter in lower end To aperture (f) and axial taper hole (g), the taper of axial taper hole (g) and taper bolt (5) is completely the same, and the two is close match after can general Moisture therein all squeezes out, and leak or gas leakage can't occur；The upper end of guide rod is combined with nut (17) and washer (18), To control lifting cover（7）The extreme lower position of whereabouts.

6. Anti-freezing water hammer-resistant combined high-speed according to claim 1 or 2 is vented intake valve, it is characterised in that：Sealing Pad（9）It is a flat annulus, is arranged on valve deck（10）The lower pit and spacer of bottom surface（6）In the upper groove of upper end, and by It clamps between, gasket（9）Centre bore diameter be equal to big gas vent（e）Diameter, gasket（9）Lower cone hole Gradient and lifting cover（7）Seal closure gradient it is identical, the two forms the valve port of big gas vent (e).

7. Anti-freezing water hammer-resistant combined high-speed according to claim 1 or 2 is vented intake valve, it is characterised in that：Valve body Muff is equipped on the outside of the neck of lower section（19）.