CN209164700U - High-temperature stop valve - Google Patents

Abstract

The utility model relates to a high temperature stop valve is equipped with the valve body, the valve body includes the valve body main part and is used for sealing the open-top's of valve body valve gap adopts the pilot valve structure, it is vice to be equipped with main seal on the main medium passageway of valve body, main seal is vice to be formed by main valve seat and main opening and closing member, leave the clearance between the lateral surface of uide bushing and the uide bushing mating surface on the valve body, be equipped with between uide bushing and the valve gap the uide bushing position circle, be equipped with a plurality of spring mounting holes that are used for installing uide bushing pressure spring on the bottom surface of uide bushing position circle, uide bushing pressure spring's upper end is stretched into spring mounting hole is in certain precompression state, the cup bottom of main opening and closing member constitutes the auxiliary valve seat, is equipped with vice opening and closing member. The utility model discloses effectively because of the inside relative expansion of uide bushing is to the hindrance of main opening and closing member action under high temperature medium to be favorable to guaranteeing the sealed of valve gap and relevant flange structure.

Description

High temperature break valve

Technical field

The utility model relates to a kind of high temperature break valves.

Background technique

The existing shut-off valve for being adapted to high-temperature medium generallys use Electrical heads (electromagnetic actuator device) driving, Electrical heads transmission The vertical output rod of mechanism can move up and down under the drive of Electrical heads, and then the valve rod of shut-off valve is driven to move up and down, Under industrial application occasion, shut-off valve generallys use guide's valve arrangement, setting primary seal pair and secondary sealing pair in valve body, primary seal pair Valve seat (main valve seat) be horizontally placed in the medium channel of valve body, center through hole constitute in main medium channel it is necessary it Place, the opening and closing element (main valve clack) of primary seal pair are located above the main valve seat in valve chamber, and it is disposed thereon that main opening and closing element is equipped with connection The epicoele of side and the damping hole of the lumen on the outside of it, keep the sealing surface of its sealing surface and main valve seat close when main opening and closing element moves down After touch, the main medium channel for flowing through main valve seat is cut off, and primary seal pair enters closed state, when main opening and closing element moves up disengaging for sealing-in After main valve seat, the center through hole of main valve seat is opened, and main medium channel conducting, primary seal pair enters open state, is equipped in valve chamber Vertical guide sleeve, covers the track that moves up and down that main opening and closing element is thus limited in the outside of main opening and closing element, secondary medium channel (or Claim guide's medium channel) one end connection be located at main opening and closing element above epicoele, the other end be connected to valve outlet plenum, the pair The valve seat (auxiliary-seat) of sealing pair is located at the top of main opening and closing element, and center through hole constitutes the necessary place in secondary medium channel, The opening and closing element (secondary flap) of secondary sealing pair is connected to the lower end of valve rod, positioned at the top of auxiliary-seat, when using Electrical heads driving, Electrical heads obtain it is electric after, by the electromagnetic action between its internal electromagnetic activity part and fixing piece (dynamic iron core and static iron core), drive Drive shaft and valve rod overcome the active force of reset spring to move up, and then secondary opening and closing element is driven to be detached from auxiliary-seat, make secondary medium Channel conductive, upper intracavitary medium pass through secondary medium channel and flow into outlet plenum, reduce the pressure medium above winner's opening and closing element To the pressure medium of lumen and snout cavity, by the pressure for the lumen pressure medium and epicoele pressure medium for acting on main opening and closing element Difference drives main opening and closing element to move up, and main opening and closing element is detached from main valve seat and main medium channel is connected, and valve is in the open state, After Electrical heads power-off, the electromagnetic force inside Electrical heads between electromagnetic activity part and fixing piece disappears, under the action of reset spring, Drive shaft connection valve rod moves down together, causes secondary opening and closing element and auxiliary-seat in sealing contact, cuts off secondary medium channel, passes through resistance The medium that Buddhist nun hole flows into epicoele can not be flowed out by secondary medium channel, and epicoele pressure medium gradually rises, when being increased to certain journey After degree, under epicoele medium and the effect of flap lateral media pressure difference, main opening and closing element moves down, cutting master in sealing contact with main valve seat Medium channel, valve are in close state, under lasting closed state, the medium of lumen constantly pass through damping hole enter it is upper Chamber, until upper cavity pressure and snout cavity pressures maintain an equal level, the pressure medium thereby increased inside and outside main opening and closing element is poor, ensure that Sealing effect.The defect of existing this shut-off valve is mainly manifested in: guide sleeve is fixedly installed in valve body, lateral surface and valve body It is very close to each other between guide sleeve mating surface on inner wall, since guide sleeve is located in valve chamber, surrounded by medium, and the appearance of valve body It is exposed, is contacted with ambient air, therefore when being used for high-temperature medium, the temperature rise of guide sleeve and degree of thermal expansion are obvious Temperature rise and degree of thermal expansion greater than valve body, the lateral surface of guide sleeve because by the guide sleeve mating surface constraint on valve interior wall, It will make gap shrinks between guide sleeve and flap even inward against expansion when guide sleeve needs a greater degree of expansion The two is set to press together, the flexibility for thus seriously hampering flap movement even can be stuck by flap, and valve is caused to be closed Failure；In addition, due to secondary medium channel be arranged in valve deck, affect the pressure-resistant performance of valve deck, also affect valve body with Sealing performance between valve deck.

Utility model content

In order to solve the above technical problems, the utility model provides a kind of high temperature break valve, avoid because of the inside phase of guide sleeve Main opening and closing element movement is interfered to expansion, the sealing performance between valve body and valve deck is improved, improves major and minor sealing pair Sealing performance.

The technical solution of the utility model is: a kind of high temperature break valve, valve body is equipped with, on the main medium channel of the valve body Equipped with primary seal pair, the primary seal pair is made of main valve seat and main opening and closing element (or main valve clack), and the main valve seat level is set It sets in the valve body, center through hole constitutes a necessary place of the main medium channel, and the main opening and closing element is located at institute The top of main valve seat is stated, is equipped with vertical guide sleeve in the valve body, the main opening and closing element is located in the guide sleeve, outside There are the gap that is slidably matched between face and the inner wall of the guide sleeve, the valve interior wall is equipped with for matching with the guide sleeve The guide sleeve mating surface of conjunction, there are gaps between the lateral surface of the guide sleeve and the guide sleeve mating surface.

Preferably, the lateral surface of the guide sleeve is equipped with the guide sleeve flange to extend radially outwardly out, the guide sleeve method Orchid is located at the middle and upper part of the guide sleeve, and the outer diameter of the guide sleeve flange is greater than the guide sleeve outer diameter being positioned above and is located at Guide sleeve outer diameter below, the valve body is interior equipped with guide sleeve supporting structure matched with the guide sleeve flange, described to lead It is supported on the upper surface of the guide sleeve supporting structure to the lower end surface of set flange, is set on the upper surface of the guide sleeve flange There is the guide sleeve holddown spring for the guide sleeve to be pressed downward, the lower end of the guide sleeve holddown spring is pressed in the guiding On the upper surface for covering flange, upper end connects the guide sleeve locating ring on the valve body.

Preferably, the guide sleeve holddown spring is the helical spring pre-tightened, and quantity is multiple.

Preferably, the valve body includes valve body and the open-topped valve deck for closing the valve body, institute The top that valve deck is fixedly mounted on the valve body is stated, guide sleeve locating ring, the guide sleeve positioning are equipped in the valve body Between the guide sleeve and valve deck, the bottom surface of the guide sleeve locating ring is equipped with for installing guide sleeve holddown spring circle Spring mounting hole, the quantity of the spring mounting hole be it is multiple, positioned at the surface of the guide sleeve flange, the guide sleeve The upper end of holddown spring protrudes into the spring mounting hole and in certain pre-compressed state.

Preferably, the bottom surface of the guide sleeve locating ring is equipped with guide sleeve inserting groove, and the guide sleeve inserting groove is located at The inside of the spring mounting hole extends in the guide sleeve inserting groove at the top of the guide sleeve, lateral surface with it is described There are gaps between the lateral wall of guide sleeve inserting groove, between the top of the guide sleeve and the slot bottom of the guide sleeve inserting groove There are spacing.

Preferably, the valve body uses guide's valve arrangement, and the main opening and closing element is cup-shaped, the bottom of a cup structure of the main opening and closing element At auxiliary-seat, the main opening and closing element bottom of a cup that the bottom of a cup center of the main opening and closing element is equipped with the center through hole for constituting the auxiliary-seat is logical Hole, secondary opening and closing element (or secondary flap) is equipped in the inner hole of the main opening and closing element, and the pair opening and closing element and the auxiliary-seat are constituted Secondary sealing is secondary (pilot valve sealing pair), between the lateral surface of the pair opening and closing element and the inner wall sliding surface of the main opening and closing element are equipped with Gap cooperation.

Preferably, the inner hole bottom of the main opening and closing element is equipped with extension diameter section, and the internal diameter of the extension diameter section is greater than main opening and closing element The internal diameter of inner hole other parts.

Preferably, the lower part or bottom of the main opening and closing element are equipped with the damping hole being connected to inside and outside it, the damping hole Outer openings be located at the position that the main opening and closing element is not covered by the guide sleeve under primary seal pair closed state, the resistance The inside opening in Buddhist nun hole is located at the position that the main opening and closing element is not covered by the secondary opening and closing element under secondary sealing pair closed state, The main opening and closing element is equipped with the epicoele deflector hole of connection epicoele and secondary chamber.

Preferably, the lower end of the lower end connection of the valve rod secondary opening and closing element, upper end and pull rod connects, and the pull rod is The output shaft of the transmission mechanism, the pair opening and closing element is cup-shaped, and the lower end of the valve rod is expansion-head, the expansion-head it is outer Shape is smooth surface of revolution, and middle part protrusion is installed on the inner hole of the pair opening and closing element in the inner hole of the secondary opening and closing element There is plug, the plug is equipped with vertical center through hole, and the center through hole aperture of the plug is greater than the stem body part Diameter, less than the diameter in the middle part of the expansion-head, the main part of the valve rod passes through the center through hole of the plug, described swollen Swollen head is located between the plug and the bottom of a cup of the secondary opening and closing element.

Preferably, the reducing diameter part for being used to form main valve seat is equipped in the valve body, the reducing diameter part radially extends internally Annular, mesoporous constitutes the center through hole of the main valve seat, and the upper surface of the reducing diameter part is provided with the ring around its mesoporous The sealing surface of shape protrusion, the main valve seat is arranged on the annular protrusion, and the bottom of a cup upper surface of the main opening and closing element, which is provided with, encloses Around the annular protrusion of the main opening and closing element bottom of a cup through-hole, the sealing surface of the auxiliary-seat is arranged on the annular protrusion.

The beneficial effects of the utility model are: due to the guide sleeve mating surface on the lateral surface and valve interior wall of guide sleeve Between there are gap, the size in the gap, when so that being used for high-temperature medium, guiding can be rationally set according to actual use occasion The expanded by heating of set by the obstruction of the guide sleeve mating surface on valve interior wall, it is inside because being limited by valve body not avoid guide sleeve Relative expansion, since usual main opening and closing element is identical or similar as guide sleeve (and valve body) material therefor, thermal expansion coefficient is identical Or essentially identical (have differences but the difference is in practice without materially affect), main opening and closing element and guide sleeve under high-temperature medium Synchronous expansion, remains enough gaps between the two, thus avoids under high-temperature medium because guide sleeve is inward against expansion Obstruction to flap movement.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is I partial enlarged view corresponding with Fig. 1.

Specific embodiment

The utility model is described further with reference to the accompanying drawing.

As depicted in figs. 1 and 2, high temperature break valve provided by the utility model can usually use guide's valve arrangement, can also To use any other suitable valve mechanism, it is equipped with valve body, the main medium channel of the valve body is equipped with primary seal pair, described Primary seal pair is made of main valve seat and main opening and closing element 10, and the main valve seat is horizontally set in the valve body, center through hole structure At a necessary place of the main medium channel, the main opening and closing element is located at the top of the main valve seat, sets in the valve body There is vertical guide sleeve 13, the main opening and closing element is located in the guide sleeve, between lateral surface and the inner wall of the guide sleeve There are the gaps that is slidably matched, and thus limit and guide the main opening and closing element can move up and down along the axial direction of the guide sleeve, institute Valve interior wall is stated equipped with the guide sleeve mating surface for cooperating with the guide sleeve, the lateral surface of the guide sleeve is led with described To, there are gap, the degree of thermal expansion caused by the guide sleeve is because of high-temperature medium is greater than the heat of the valve body between set mating surface When degrees of expansion, thus the guide sleeve will not be protected due to the limitation or obstruction of the guide sleeve mating surface inward against expansion The gap under high-temperature medium between the guide sleeve and the main opening and closing element has been demonstrate,proved, and then has been avoided because the guide sleeve is with described in The degree of thermal expansion of valve body is different and leads to main opening and closing element limitation of movement or is stuck.

In general, the lateral surface of the main opening and closing element can be cylindrical, correspondingly, the inner hole of the guide sleeve is also in cylinder Shape, or be circular hole.

In general, the lateral surface of the guide sleeve can be equipped with the guide sleeve flange 13.2 to extend radially outwardly out, it is described to lead It is located between the upper surface and lower end surface of the guide sleeve to set flange, the spacing preferably between the upper surface of the guide sleeve Less than the spacing between the lower end surface of the guide sleeve, it is possible thereby to which the referred to as described guide sleeve flange is located at the guide sleeve Middle and upper part, the outer diameter of the guide sleeve flange are greater than outside the guide sleeve outer diameter being positioned above and the guide sleeve being disposed below Diameter is made of three sections of waney cylindrical segments it is possible thereby to be considered as the appearance profile of the guide sleeve, is located in the middle circle Cylindrical portion corresponds to the guide sleeve flange, and the diameter of cylindrical segment below and above is less than the cylinder positioned at middle part The diameter of section can also set the appearance profile of the guide sleeve to the ladder shaft-like of more multistage, wherein outer diameter as needed Maximum shaft part corresponds to the guide sleeve flange, is preferably provided with guide sleeve matched with the guide sleeve flange in the valve body Supporting structure, the upper surface of the guide sleeve supporting structure generally can be the plane of annular, can also use and the guide sleeve The matched other arbitrary shapes in the lower end surface of flange, the lower end surface of the guide sleeve flange are supported on the guide sleeve supporting structure Upper surface on.The upper surface of the guide sleeve flange is equipped with the guide sleeve holddown spring for the guide sleeve to be pressed downward 16, the lower end of the guide sleeve holddown spring is pressed on the upper surface of the guide sleeve flange, and upper end connects on the valve body Guide sleeve sealing ring, can be and be directly connected to, and can also be indirectly connected with by the part being fixedly connected with the valve body, thus be limited The position of the upper end of guide sleeve holddown spring in vertical direction, by the elastic force of the guide sleeve holddown spring, so that guiding The guide sleeve flange is fixedly clamped by set holddown spring together with the guide sleeve supporting structure from upper and lower both direction.

The guide sleeve holddown spring can for pre-tighten helical spring, quantity be it is multiple, uniformly or with other rule sides Formula is distributed on the same circumference.

With the center through hole hole wall of the guide sleeve supporting structure of the lateral surface clearance fit of the guide sleeve flange with And the equal structure of valve interior wall with the lateral surface clearance fit of the guide sleeve flange above the guide sleeve supporting structure At the guide sleeve mating surface, there are gaps appropriate between the guide sleeve lateral surface of corresponding site, by the guide sleeve Limiting wherein and is allowing guide sleeve radially and has certain change in location or volume change.

Due to the fixed form of the guide sleeve be by the elastic force of the guide sleeve holddown spring by the guide sleeve from Upper and lower both direction clamps, therefore the guiding is allowed to be cased with certain radial deflection, can use main opening and closing element and main valve seat Between automatic centering effect realize the automatic centering effect between main opening and closing element and main valve seat, the position of adjust automatically guide sleeve It is adapted to corresponding centering requirement, thus advantageously reduces processing and assembly precision requirement, and improves the close of the primary seal pair Seal effect.

The sealing surface of the main opening and closing element can use taper or spherical seal surface, to obtain or improve automatic centering energy Power, can also be using other suitable shapes such as planes.

The valve body includes valve body 8 and the open-topped valve deck 18 for closing the valve body, the valve Lid can be fastened by bolts the top for waiting suitable way to be fixedly mounted on the valve body, set between the valve body There are sealing material 26, such as gasket, to guarantee the sealing between the valve deck and valve body.

Guide sleeve locating ring 17 is preferably provided in the valve body, the guide sleeve locating ring is located at the guide sleeve and valve deck Between, preferably in a ring, bottom surface is equipped in the spring mounting hole of installation guide sleeve holddown spring the guide sleeve locating ring, The quantity of the spring mounting hole is usually multiple, and helical spring can be used, positioned at the surface of the guide sleeve flange, preferentially Equidistantly distributed or other regular distribution modes are used on the same circumference, the upper end of the guide sleeve holddown spring is protruded into described Spring mounting hole is simultaneously in certain pre-compressed state, while the guide sleeve is thus compressed downwards, upwards described in compression Guide sleeve locating ring is pressed in the upper surface of the guide sleeve locating ring on the bottom surface of the valve deck.

Guide sleeve inserting groove is also provided on the bottom surface of the guide sleeve locating ring, the guide sleeve inserting groove is located at institute The inside of the first annular slot of locating ring is stated, the top 13.3 of the guide sleeve extends in the guide sleeve inserting groove, outside There are gaps between face and the lateral wall of the guide sleeve inserting groove, to avoid being radially expanded for the guide sleeve is interfered.

Preferably there are gaps 13.4 between the top of the guide sleeve and the slot bottom of the guide sleeve inserting groove, in order to logical It crosses bolt valve deck 18 is pressed on sealing element 26, guarantees the sealing between valve deck and valve body.

The lateral surface of the guide sleeve locating ring is kept off in the sealing material between the valve deck and valve body (tongue and groove or convex-concave knot can be usually used for the structure of the sealing material to be arranged on side, with the valve deck and valve body Structure) sealing material is surrounded together, prevent the sealing material radial under the squeezing action of the valve deck and valve body It is inwardly projecting, it thus not only contributes to improve sealing effect, but also be conducive to extend the service life of sealing material.

The main opening and closing element is cup-shaped, and the cavity of cupuliform can be described as the inner hole of main opening and closing element, the main opening and closing element it is outer Side is cylindroid, is cooperated with the inner wall glade plane space of the guide sleeve, under the guidance or restriction of guide sleeve Lower movement.

Preferably, the bottom of a cup of the main opening and closing element is used as auxiliary-seat, the bottom of a cup center of the main opening and closing element is equipped with master and opens Closing member bottom of a cup through-hole 4, thus the main opening and closing element bottom of a cup through-hole constitutes the center through hole of the auxiliary-seat.

For the valve body using guide's valve arrangement, it is preferably provided with secondary opening and closing element 14 in the inner hole of the main opening and closing element, it is described Secondary opening and closing element and the auxiliary-seat constitute secondary sealing pair (pilot valve sealing pair), the lateral surface of the pair opening and closing element and the master The inner wall sliding surface of opening and closing element is equipped with clearance fit, allow the secondary opening and closing element in the inner hole of the main opening and closing element on move down Dynamic, the cupuliform side wall of the main opening and closing element plays the role of secondary opening and closing element mobile guide as a result, can be considered leading for secondary opening and closing element To set.

The inner hole bottom of the main opening and closing element is equipped with extension diameter section 12, and internal diameter is greater than the internal diameter of other parts, and the pair opens Space between the bottom of closing member and the inner wall of the main opening and closing element constitutes secondary chamber, passes through the setting and holding of the extension diameter section, shape Still there is certain volume at the pair chamber described under secondary sealing pair closed state.

Equipped with the reducing diameter part for being used to form main valve seat in the valve body, the annular that the reducing diameter part radially extends internally, Its mesoporous constitutes the center through hole of the main valve seat.

Preferably, the upper surface of the reducing diameter part is provided with the annular protrusion 9 around its mesoporous, institute by modes such as built-up welding The sealing surface for stating main valve seat is arranged on the annular protrusion, can be processed on the annular protrusion of built-up welding by machining mode Required sealing surface.When the primary seal pair is closed, the bottom of the main opening and closing element is pressed in the protrusion of the annular built-up welding, institute The sealing surface for stating main opening and closing element is sealed against each other with the sealing surface of the main valve seat to be contacted, and the center through hole of main valve seat is passed through in cutting Medium channel.

Actually region in sealing contact is preferably placed at the master and opens with the sealing surface of the main valve seat on the main opening and closing element The inside of the bottom surface outer rim of closing member, so that the area that the bottom surface of the main opening and closing element is surrounded beyond the secondary practical sealing contact surface of primary seal Domain, and then the pressure medium of surrounding acts on the bottom surface beyond part.

The bottom of a cup upper surface of the main opening and closing element is provided with by modes such as built-up welding around the main opening and closing element bottom of a cup through-hole Annular protrusion 11, the sealing surface of the auxiliary-seat is arranged on the annular protrusion, can be by machining mode in built-up welding Required sealing surface is processed on annular protrusion.When the secondary sealing pair is closed, the bottom of the pair opening and closing element is pressed in the ring In the protrusion of shape built-up welding, the sealing surface of the pair opening and closing element is sealed against each other with the sealing surface of the auxiliary-seat to be contacted, and cutting is passed through The medium channel of main valve seat bottom of a cup through-hole.

Actually region in sealing contact is preferably placed at the pair and opens with the sealing surface of the auxiliary-seat on the pair opening and closing element The inside of the bottom surface outer rim of closing member, so that the area that the bottom surface of the pair opening and closing element is surrounded beyond the secondary practical sealing contact surface of secondary sealing Domain, and then the pressure medium of surrounding acts on the bottom surface beyond part.

The lower part or bottom of the main opening and closing element are equipped with the damping hole 3 being connected to inside and outside it, the outside of the damping hole Opening is located at the position that the main opening and closing element is not covered by the guide sleeve under primary seal pair closed state, is preferably placed at described The bottom section of the lateral surface of main opening and closing element, the inside opening of the damping hole are located at the main opening and closing element and close in secondary sealing pair The position that do not covered by the secondary opening and closing element under state, the side wall of the extension diameter section of the inner hole of the preferably described main opening and closing element.Exist as a result, In the state that the primary seal pair and secondary sealing pair are turned off, the medium in the lumen of the guide sleeve can pass through damping Hole enters secondary chamber, the pore size of the damping hole should be suitable for effective damping effect is capable of forming to the medium flowed through so that The pressure medium for obtaining the epicoele after secondary sealing pair is opened can be substantially reduced, and then make main opening and closing element in lumen and epicoele medium It being moved up under the action of pressure difference, should also be avoided and damp excessive and cause flow velocity excessively slow, influence reaches the stable time, The damping hole data such as the aperture of optimization can be obtained by hydrodynamics method or experiment.

The main opening and closing element is equipped with the epicoele deflector hole 1 of connection epicoele 25 and secondary chamber 12, and the epicoele deflector hole is preferred Vertical through holes on the side wall of the main opening and closing element are set, and the upper end is opened on the top of the main opening and closing element, lower ending opening In the roof of the extension diameter section of the inner hole of the main opening and closing element, so that remaining basic non-resistance between epicoele and secondary chamber The connection of (resistance for being significantly less than damping hole), the medium for flowing into secondary chamber through damping hole can swimmingly be flowed by epicoele deflector hole Enter epicoele, is rapidly reached epicoele pressure medium and secondary chamber pressure medium unanimously, after secondary valve sealing pair is opened, upper intracavitary Jie Matter can smoothly flow therein secondary chamber by epicoele deflector hole, and then flow into cavity of resorption and outlet plenum by the center through hole of auxiliary-seat.

The wall thickness of the main opening and closing element should ensure that in the expansion segment that epicoele deflector hole can be provided and inner hole is provided Meanwhile there is required intensity.

The lower end connection secondary opening and closing element of the valve rod, upper end are used to connect the output of driving device, for example, can on The pull rod 24 of lower movement, it is possible thereby to be moved up and down by pull rod band ovable valve stem.The driving device usually may include former dynamic Machine and corresponding transmission mechanism, output shaft (output rod) of the pull rod as the transmission mechanism, pass through the biography of transmission mechanism Movement is moved up and down with the output drive by described prime mover, and the pull rod drives the valve rod to move up and down, the valve rod band It moves the secondary opening and closing element to move up and down, then realizes the opening and closing of the secondary valve sealing pair.

The valve deck is equipped with valve rod hole, for across the valve rod and/or the pull rod.

The valve rod and the pull rod can be using being fixedly and coaxially connected, thus during the work time can be by pull rod and valve Bar is considered as a component, can be connected through a screw thread mode or any other suitable way realizes this connection, by the valve rod Upper end be screwed onto the pull rod upper opening in the axial screw hole of pull rod, and connect anti-loosening fastening nut in screw hole outward turning, that is, realize Described be fixedly connected, and be easy for installation and removal.

The pair opening and closing element is preferably cup-shaped, and the cavity of cupuliform can be described as the inner hole of secondary opening and closing element, under the valve rod End is expansion-head, and the shape of the expansion-head is smooth surface of revolution, middle part protrusion, positioned at the inner hole of the secondary opening and closing element In, installation (being typically screwed on) has plug on the inner hole of the pair opening and closing element, and the plug is equipped with vertical center through hole, institute The center through hole aperture for stating plug is greater than the diameter of the stem body part, described less than the diameter in the middle part of the expansion-head The main part of valve rod passes through the center through hole of the plug, and the expansion-head is located at the cup of the plug and the secondary opening and closing element Between bottom, so that the expansion-head of valve rod cannot deviate from from the secondary opening and closing element, and then valve rod is made to be able to drive secondary opening and closing Part moves up and down together.

The indent for matching with the expansion-head of the valve rod is equipped at the lower port of the center through hole of the plug to match Conjunction face, the radius of curvature of the indent mating surface are preferably greater than the radius of curvature on the top of the expansion-head, pass through the expansion Head cooperates with the corresponding surface of the indent mating surface, allow the valve rod relative to the secondary opening and closing element have it is certain not coaxially Thus degree, inclination or radial deflection considerably reduce the associated drives and driving member of driving device, phase on valve rod and valve deck The processing and assembly precision requirement for answering mounting structure can still guarantee valve rod and pair there are when certain deviation in movement Normal transmission between opening and closing element.

The axial movement surplus of the expansion-head of valve rod axial direction of the expansion-head in the secondary opening and closing element in other words Gap should be suitable for, in the case where allowing expansion-head to relatively rotate and deflection, excessive gap being avoided to cause in commutation process The inner hole bottom of driving error, the pair opening and closing element can be equipped with resilient sleeper-bearing, after resilient sleeper-bearing is arranged, the expansion of the valve rod Head is in contact with the resilient sleeper-bearing, can avoid valve rod stuck by plug in a big way using the elasticity of resilient sleeper-bearing, It advantageously reduces assembly and corresponding requirement on machining accuracy and is easy to use.

The utility model can be driven by suitable driving device, the driving device usually may include prime mover and Its transmission mechanism, the movement output mode of the output rod of transmission mechanism should be the upper end for moving up and down, and connecting valve rod, thus Band ovable valve stem moves up and down, and described prime mover can use motor, fluid pressure drive device or electromagnetic actuator device (abbreviation electromagnetism Head).Fig. 1 gives a kind of embodiment using Electrical heads 20, and the Electrical heads are equipped with the control cabinet 21 for controlling its work, described The electricity output of control cabinet accesses the coil input end of the Electrical heads by modes such as cables 22, and the control cabinet can be independence , it is also possible to and the Electrical heads one, the control cabinet, the control circuit of control cabinet and its electricity input and the electricity Connection type between the coil of magnetic head etc. can use the prior art, and the output shaft (output rod) 19 of the Electrical heads passes through The output (pull rod 24) of transmission mechanism 23 connects the valve rod 15 of the valve body, and thus band ovable valve stem moves up and down.

It is interconnected and is integrated if the utility model is divided into stem portion to the intracorporal cavity of valve for the convenience in statement Each section between usually not stringent boundary, snout cavity 7 is the cavity positioned at valve body import side, and outlet plenum 5, which refers to, to be located at The cavity of valve outlet side, cavity of resorption 6 refer to being directly communicated as one with the outlet plenum below the primary seal seat Cavity, lumen 2 refer to that the cavity being communicated as one with the snout cavity positioned at the secondary top of the primary seal, epicoele 25 refer to position Cavity above the flap, alleged pair chamber refer to the main opening and closing element inner chamber body being located at below secondary opening and closing element, the snout cavity, Lumen, cavity of resorption and outlet plenum, which are interconnected, forms the main medium channel of valve, and the center through hole of main valve seat is located at lumen and cavity of resorption Between, the only way which must be passed for entering cavity of resorption by lumen is constituted, after the closing of main valve seat center through hole, that is, main medium channel can be cut off, The damping hole, secondary chamber constitute the secondary medium channel for being connected to lumen and main valve seat center through hole, institute with main opening and closing element bottom of a cup through-hole It states epicoele and the secondary chamber is connected to by epicoele deflector hole, the center through hole of the auxiliary-seat, which is constituted, enters main valve seat center by secondary chamber The only way which must be passed of through-hole, after the center through hole of auxiliary-seat is closed, i.e., cut-off secondary medium channel.

The utility model has following features:

1) it is equipped with gap between guide sleeve and valve body, guide sleeve can be guaranteed because of free extension of expanding with heat and contract with cold in valve body Main opening and closing element moves freely in guide sleeve.

2) it is equipped with inside fic circle, does not influence the positioning accuracy of associated seal inner ring when guide sleeve is because expanding with heat and contract with cold, really The positioning of secrecy sealing inner ring is reliable.And set up by inside fic circle, it effectively prevents particle and enters between guide sleeve and valve body Come in gap, guarantees guide sleeve in valve body because of free extension of expanding with heat and contract with cold.

3) Direct Action Type on-off structure is used, makes shut-off valve that there is zero pressure difference open function, driving device can pass through valve rod handle Opening and closing element, which mentions, to be opened, and valve can be opened under zero pressure difference.And the sealing performance and compressive resistance of valve deck and related flange are improved, Deflector hole is located on main opening and closing element, does not have deflector hole in valve deck, to improve the sealing performance of valve deck and related flange and resistance to Compressive Strength.

4) secondary opening and closing element and the special construction of related seals pair, secondary opening and closing element and corresponding sealing surface of seat are plane, are changed Processing technology has been apt to it, it is ensured that the leakproofness of secondary sealing pair.And the outer circle of secondary opening and closing element and the inner hole of main opening and closing element can be realized Precision-fit improves the positioning accuracy of secondary opening and closing element, ensure that secondary sealing secondary sealing.

5) special construction on valve rod head, the head of valve rod are arranged to expansion-head, can usually use spherical shape, guarantee Cooperation flexibility between secondary opening and closing element and valve rod, it is ensured that secondary opening and closing element precisely moves in main opening and closing element, ensure that secondary close Seal secondary leakproofness.

6) it is adapted to drive using Electrical heads, it is easy to control, the design of control cabinet can be carried out according to the prior art, improved The function of driving head, such as power saving function, low-temperature-rise function, big suction function.

The utility model is alleged to refer to that internal diameter becomes smaller or internal diameter degrees of expansion is less than under free state and answers inward against expansion There is the expansion fashion of degrees of expansion.

It is disclosed by the utility model it is each preferably with optional technological means, unless otherwise indicated and a preferred or optional skill Art means are that further limiting for another technological means is outer, can form several different technical solutions in any combination.

Claims (10)

1. a kind of high temperature break valve, it is characterised in that be equipped with valve body, the main medium channel of the valve body is equipped with primary seal pair, institute It states primary seal pair to be made of main valve seat and main opening and closing element, the main valve seat is horizontally set in the valve body, center through hole structure At a necessary place of the main medium channel, the main opening and closing element is located at the top of the main valve seat, sets in the valve body There is vertical guide sleeve, the main opening and closing element is located in the guide sleeve, stays between lateral surface and the inner wall of the guide sleeve Be slidably matched gap, and the valve interior wall is equipped with the guide sleeve mating surface for cooperating with the guide sleeve, the guiding There are gaps between the lateral surface of set and the guide sleeve mating surface.

2. shut-off valve as described in claim 1, it is characterised in that the lateral surface of the guide sleeve is equipped with and extends radially outwardly out Guide sleeve flange, the guide sleeve flange is located at the middle and upper part of the guide sleeve, and the outer diameter of the guide sleeve flange is greater than position Square guide sleeve outer diameter and the guide sleeve outer diameter being disposed below thereon, interior be equipped with of the valve body are matched with the guide sleeve flange The guide sleeve supporting structure of set, the lower end surface of the guide sleeve flange are supported on the upper surface of the guide sleeve supporting structure, The upper surface of the guide sleeve flange is equipped with the guide sleeve holddown spring for the guide sleeve to be pressed downward, the guide sleeve The lower end of holddown spring is pressed on the upper surface of the guide sleeve flange, and upper end connects the guide sleeve locating ring on the valve body.

3. shut-off valve as claimed in claim 2, it is characterised in that the guide sleeve holddown spring is the helical spring pre-tightened, number Amount is multiple.

4. shut-off valve as claimed in claim 3, it is characterised in that the valve body includes valve body and for closing the valve The open-topped valve deck of phosphor bodies, the valve deck are fixedly mounted on the top of the valve body, are equipped with and lead in the valve body To set locating ring, the guide sleeve locating ring is between the guide sleeve and valve deck, on the bottom surface of the guide sleeve locating ring Equipped with the spring mounting hole for installing guide sleeve holddown spring, the quantity of the spring mounting hole be it is multiple, led positioned at described To the surface of set flange, the upper end of the guide sleeve holddown spring protrudes into the spring mounting hole and in certain precommpression State.

5. shut-off valve as claimed in claim 4, it is characterised in that the bottom surface of the guide sleeve locating ring is equipped with guiding inserting Access slot, the guide sleeve inserting groove are located at the inside of the spring mounting hole, extend to the guiding at the top of the guide sleeve Cover in inserting groove, there are gap between lateral surface and the lateral wall of the guide sleeve inserting groove, the top of the guide sleeve with There are spacing between the slot bottom of the guide sleeve inserting groove.

6. shut-off valve a method as claimed in any one of claims 1 to 5, it is characterised in that the valve body uses guide's valve arrangement, and the master opens Closing member is cup-shaped, and the bottom of a cup of the main opening and closing element constitutes auxiliary-seat, and the bottom of a cup center of the main opening and closing element, which is equipped with, constitutes the pair The main opening and closing element bottom of a cup through-hole of the center through hole of valve seat is equipped with secondary opening and closing element, the secondary opening and closing in the inner hole of the main opening and closing element Part and the auxiliary-seat constitute secondary sealing pair, and the inner wall sliding surface of the lateral surface and the main opening and closing element of the pair opening and closing element is set There is clearance fit.

7. shut-off valve as claimed in claim 6, it is characterised in that the inner hole bottom of the main opening and closing element is equipped with extension diameter section, described The internal diameter of extension diameter section is greater than the internal diameter of main opening and closing element inner hole other parts.

8. shut-off valve as claimed in claim 7, it is characterised in that the lower part or bottom of the main opening and closing element, which are equipped with, to be connected in it The damping hole of outer two sides, the outer openings of the damping hole are located at the main opening and closing element under primary seal pair closed state not by institute The position of guide sleeve masking is stated, the inside opening of the damping hole is located at the main opening and closing element under secondary sealing pair closed state not The position covered by the secondary opening and closing element, the main opening and closing element are equipped with the epicoele deflector hole of connection epicoele and secondary chamber.

9. shut-off valve as claimed in claim 8, it is characterised in that the lower end connection of the valve rod secondary opening and closing element, upper end and pull rod Lower end connection, the pull rod is the output shaft of transmission mechanism, and the pair opening and closing element is cup-shaped, and the lower end of the valve rod is expansion Head, the shape of the expansion-head are smooth surface of revolution, and middle part is raised, in the inner hole of the secondary opening and closing element, the pair Plug is installed, the plug is equipped with vertical center through hole, and the center through hole aperture of the plug is greater than on the inner hole of opening and closing element The diameter of the stem body part, less than the diameter in the middle part of the expansion-head, the main part of the valve rod passes through described stifled The center through hole of head, the expansion-head are located between the plug and the bottom of a cup of the secondary opening and closing element.

10. shut-off valve as claimed in claim 9, it is characterised in that be equipped with the undergauge for being used to form main valve seat in the valve body Portion, the annular that the reducing diameter part radially extends internally, mesoporous constitute the center through hole of the main valve seat, the reducing diameter part Upper surface is provided with the annular protrusion around its mesoporous, and the sealing surface of the main valve seat is arranged on the annular protrusion, the master The bottom of a cup upper surface of opening and closing element is provided with the annular protrusion around the main opening and closing element bottom of a cup through-hole, the sealing surface of the auxiliary-seat It is arranged on the annular protrusion.