CN103968093A - Propped open type parallel dual-gate valve with deflector hole - Google Patents
Propped open type parallel dual-gate valve with deflector hole Download PDFInfo
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- CN103968093A CN103968093A CN201410163103.XA CN201410163103A CN103968093A CN 103968093 A CN103968093 A CN 103968093A CN 201410163103 A CN201410163103 A CN 201410163103A CN 103968093 A CN103968093 A CN 103968093A
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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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/029—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with two or more gates
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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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/044—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members
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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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
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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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/316—Guiding of the slide
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding Valves (AREA)
Abstract
The invention discloses a propped open type parallel dual-gate valve with a deflector hole. The propped open type parallel dual-gate valve with the deflector hole is technically characterized in that a main gate disc and an auxiliary gate disc are attached to each other with a single inclined plane, and the main gate disc and the auxiliary gate disc are provided with slightly protruding circular bosses which are smaller than a sealing face in inner diameter to serve as the fitting faces of the main gate disc and the auxiliary gate disc respectively. Gate disc hooking T-shaped grooves which are hooked mutually through T-shaped structures are formed in the upper side and the lower side of the circular boss of the main gate disc and the circular boss of the auxiliary gate disc. The deflector hole is formed in the lower end of the main gate disc, and the deflector hole is aligned to a valve channel hole when the valve is opened. A limiting boss is arranged at the upper end of the auxiliary gate disc, and the lower side face of the limiting boss makes contact with the upper side limiting plane of an inlet valve seat when the valve is closed. A spring seat is arranged on the main gate disc, and spring force acts on the auxiliary gate disc in the direction of the inclined plate downwards. The valve has the advantages that the valve has low flow resistance characteristics, has good sealing performance and sealing reliability, and is long in service life, the phenomenon of sticking is not prone to occurring, the structure is simple and reasonable, opening and closing actions are reliable, and maintenance is convenient to carry out.
Description
Technical field
The present invention relates to a kind of valve mechanism, be specifically related to a kind of structure of the parallel double-flashboard gate valve with pod apertures.
Background technique
In large-scale fluid process system, if the valve quantity that the scale of system and capacity are large, the cumulative length of pipeline is long, supporting is more, in the time carrying out the type selecting of mating valve, except considering the sealability and sealing reliability of valve, also should consider that selected valve should have alap flow resistance coefficient simultaneously, to reduce the pressure loss, reduce energy consumption.A set of large-scale unit or device need supporting numerous valve, if do not consider this point aspect valve selection, the pressure of numerous valves and energy loss are accumulated in together, and the energy consumption on system and efficiency index are brought to impact.Therefore, in theory, if do not consider the restriction that existing valve products series is brought the supporting type selecting of valve, valve supporting on main technique pipeline in large-scale unit or device and the equipment process pipe that especially operating mode medium is medium and high temperature medium and equipment is in the time carrying out type selecting, desirable valve should be: as ball valve, have good low flow resistance characteristic, as stop valve, gate valve, have good sealability and sealing reliability and high-temperature adaptability.
In large-scale thermal power machine group and large-scale petrochemical device, installing and using a large amount of valves.For the type selecting of valve, need to according to requirements possible selection be compared and be weighed, although ball valve has the advantage of low flow resistance, low pressure loss, but owing to being subject to the restriction of sealing member material and sealing configuration, its sealability and sealing reliability and high-temperature adaptability, be metallic sealing section with sealing surface, can rely on external force to increase compared with the Wedge gate valve of sealing force, also have larger gap; Although and Wedge gate valve can meet usage requirement aspect sealing and heatproof two better, but valve is in the time of opening state, be subject to the impact of valve inner flow passage form can make mobile medium turbulization and large eddy current, produce flow resistance and the pressure loss, and the flow resistance that on main process pipe and equipment, a large amount of valves produces and crushing, can increase undoubtedly unit and device energy consumption, lower efficiency.At present, in existing valve products series, temporarily be also difficult to find at the aspect such as flow resistance and sealing, temperature tolerance and use the product of needs can be for selection and supporting can both meet preferably aspect cost, reliability and working life.The larger valve of bore that present stage is used on the main technique pipeline of large-scale thermal power machine group and large-scale petrochemical device and equipment is generally to adopt Wedge gate valve as main, especially medium and high temperature operating mode, can only select gate valve to carry out supporting, as comprised in large capacity fired power generating unit in the pipe-line system such as main feedwater, main steam, reheated steam of super (super-) critical unit, generally select at present pressure-tight high pressure Wedge gate valve for supporting.Although select Wedge gate valve can meet use needs in the sealing of valve and the aspect such as high temperature resistant, the flow resistance coefficient of valve and crushing are bigger than normal is a problem that needs take in and solve.
There is the valve of low flow resistance characteristic, on its closure member, should be provided with diameter and valve and import and export the pod apertures structure that Flow diameter is suitable.
With pod apertures and be bracing type gate valve with two flat plates at the valve that sealing and the aspect such as high temperature resistant and above-mentioned requirements approach.(claim again expansion sluice valve, as shown in Figure 1 and Figure 2) on API6D petroleum natural gas pipeline, application is maximum at present, and an application is in addition geothermal vapour pipeline for bracing type gate valve with two flat plates.If the block valve using the valve of this structure as large-scale thermal power machine group and on the main process pipe of large-scale petrochemical device and equipment uses, especially use as the high-temperature high pressure valve of the pipe-line systems such as the main feedwater of large electric power plant unit, main steam, reheated steam, there is following several shortcoming: 1, flashboard assembly is full rigid construction, when worst hot case uses, easily there is the dead phenomenon of wedge, cause valve normally not open and close; 2, size and the scope on the laminating inclined-plane of main gate-board and auxiliary gate-board are excessive, when the error because of angle or while having impurity clamping stagnation to cause the anastomose property of valve seal pair not good enough on inclined-plane, and substantially uncompensated ability; 3, the laminating inclined-plane of main gate-board and auxiliary gate-board is generally processed to form by bulk material, anti-scuffing function is poor, although some producer has also adopted nitriding, nickel plating or QPQ to process, because strengthened layer thinner thickness and body material is excessively soft, the ability that scrape resistence destroys can not meet usage requirement completely; Once laminating inclined-plane produces scratch, friction factor can sharply increase, the roughness of adding the sealing surface that the roughness on the product laminating inclined-plane of some producers was just ground than process originally is both at home and abroad low many, can cause opening time, main gate-board forces to drive auxiliary gate-board to rise together, cause the sealing pair of inlet/outlet both sides in the process of opening, to have all the time the power friction of high specific pressure and even the scratch that produces sealing surface, valve opening moment of torsion also has larger increase simultaneously; 4, flashboard assembly is double inclined surface structure, bulky, Heavy Weight; 5, complex structure, amount of parts are many, have reduced the operational safety of product; 6, the part that some sizes on flashboard assembly are less is as driving components such as bearing pin, rocking arm, slide block, straight pins, opens and closes when running into jam in process and need to operating with high-torque at valve, aspect intensity and reliability, may go wrong; 7, bearing pin, straight pin generally adopt interference fit to be pressed into, to be threaded into or the mode of spot welding is fixed, and are being subject to easily deviating from after larger active force; 8, on main gate-board and auxiliary gate-board, be provided with pod apertures, after flashboard assembly unlatching, spreading, main gate-board pod apertures is difficult to guarantee and auxiliary gate-board pod apertures and valve passage hole to be verified completely, thereby is also unfavorable for reducing to greatest extent valve flow resistance simultaneously; 9, supreme sealing surface on valve rod, is unfavorable for sealing and the maintenance at filler position; 10, when the smaller bracing type gate valve with two flat plates of bore generally adopts torsion spring to assist auxiliary gate-board to open, reset, because torsion spring force direction approaches Self-locking angle and the impact of the bevel friction power of fitting, sometimes can not guarantee auxiliary gate-board energy reliable reset.
Except Wedge gate valve, the parallel double-flashboard gate valve that struts two flashboards by spring also has certain application on Water of Power Plant and steam line, and therefore Ye You producer Development and Production is crossed the parallel double-flashboard gate valve with pod apertures.Although this valve has solved resistance coefficient problem, but existing parallel double-flashboard gate valve existing some shortcomings part in structure and performance has also limited this product and has further been applied: 1, parallel double-flashboard gate valve mainly relies on medium to realize sealing to the active force of outlet side flashboard in use, and can not be as Wedge gate valve, can rely on additional wedging power to improve sealability simultaneously and in the time that certain leakage appears in valve, improve the sealing condition of valve by increasing additional wedging power; 2, parallel double-flashboard gate valve is in the time of opening state, the sealing surface of flashboard and valve seat still has the laminating of certain area, under the disturbance of flowing medium and the impact of vibration, the position that sealing surface is in contact with one another especially edge may produce and weighs wounded, once have the keying along with valve after weighing wounded, thereby damage can expand to other position of sealing surface, sealing surface comparatively fast lost efficacy.
Summary of the invention
In order to overcome the existing above-mentioned some shortcomings part of existing product, the present invention proposes a kind ofly there is low flow resistance characteristic, there is good sealability and sealing reliability, working life is more lasting, in the time that middle worst hot case uses, be difficult for occurring the dead phenomenon of wedge, the expansion type parallel double-gate-plate gate valve that simple and reasonable, switching motion is reliable, easy to maintenance.
To achieve these goals, the present invention is by the following technical solutions:
A kind of band pod apertures expansion type parallel double-gate-plate gate valve, comprise valve body, outlet valve seat, import valve seat, main gate-board, auxiliary gate-board, spring, spring seat, clamp, valve gap, valve rod, outlet valve seat and import valve seat are welded on valve body, the sealing surface of two valve seats is parallel to each other, and main gate-board is positioned at valve outlet side.Its basic structure and major technique key are: main gate-board and auxiliary gate-board fit with monocline face, on main gate-board and auxiliary gate-board, be respectively arranged with the circular bosses that diameter is less than sealing surface of seat internal diameter, slightly protrudes from ambient surface, boss plane is the faying surface of major and minor flashboard; The upper and lower sides that is positioned at circular bosses at main gate-board and auxiliary gate-board be provided with taking T-slot structure mutually hook together, bearing of trend hooks together T groove and auxiliary gate-board hooks together T groove as the main gate-board of substantially horizontal, main gate-board hooks together the groove interior edge face that T groove and auxiliary gate-board hook together T groove and leaves enough gaps that can allow auxiliary gate-board move up and down along the true dip direction of major and minor flashboard faying surface; Lower end at main gate-board is provided with pod apertures, while moving to enable possition on main gate-board, pod apertures and valve passage hole substantially align and the both ends of the surface of pod apertures and outlet sealing surface of seat and import sealing surface of seat between leave little gap; Upper end at auxiliary gate-board is provided with positive stop lug boss, and the plane of positive stop lug boss downside is in the time that auxiliary gate-board is displaced downwardly to closed position and the plane of import valve seat upside---the spacing plane contact of auxiliary gate-board.
In order to realize better the function of this product, the Performance And Reliability of raising product, the present invention is additional some following further technological schemes also:
Valve rod is connected with T-slot Placement with main gate-board, is provided with the T-slot of bearing of trend perpendicular to sealing surface in the upper end of main gate-board.
At the upper end position of auxiliary gate-board, be positioned at positive stop lug boss both sides two spring seats that are fixed on main gate-board be set, the main body of spring seat---on pedestal, have counterbore down, in counterbore, place spring, the axial direction of counterbore and spring is parallel to the direction on the laminating inclined-plane of main gate-board and auxiliary gate-board; The corresponding position that is positioned at spring lower end at auxiliary gate-board is processed with the plane perpendicular to axle of spring direction---spring force pressure-bearing surface, this plane the direction perpendicular to the laminating inclined-plane of main gate-board, auxiliary gate-board.
Above-mentioned spring seat fixing in the following way on main gate-board: have two rectangular through holes perpendicular to sealing surface direction on main gate-board, the right-hand member of spring seat is the square body that can insert rectangular through holes, length and be greater than rectangular through holes, the cross section of the scope side of being greater than, the longitudinal cross-section body of the pedestal part of the spring seat side of being positioned at body left end, the part of stretching out rectangular through holes right-hand member at the square body of spring seat vertically has restraining groove; Be provided with clamp locating slot in the bottom of the T-slot of main gate-board, the width of the clamp locating slot on width and the main gate-board of its plate body part of clamp of T-shaped, platy structure quite and be installed in clamp locating slot, the position that the end of clamp right-hand member projection is positioned at the restraining groove on spring seat at it is provided with defining flange, when clamp is installed, defining flange can snap in restraining groove, and after valve assembling, the lower end surface of valve rod is positioned at the upside of clamp.
Circular bosses on circular bosses and auxiliary gate-board on main gate-board be adopt resistance to wear, the built-up welding of scrape resistence hard material and processing after form overlaying surface.
Certain limit in sealing surface one side of main gate-board and sealing surface one side of auxiliary gate-board, sealing surface internal diameter, all arrange and remove the recessed structure of certain material, the bottom surface of recessed portion is ramped bottom surface consistent with the true dip direction on the laminating inclined-plane of main gate-board, auxiliary gate-board.
The connection of valve body and valve gap and sealing configuration adopt with double-screw bolt, nut flange and Sealing in body, lid are carried out to fastening bolt linkage structure.
The guide structure that main gate-board moves up and down in valve body adopts: on main gate-board, arrange in guiding rib, valve body guiding groove is set.
The position being positioned at outside valve body cavity at valve rod arranges anti-rotation guide structure, and described anti-rotation guide structure comprises the guide plate being fixed on valve rod, the column that is positioned at valve gap upside, and guide plate can slide up and down along column.
Be positioned at the spacing plane of auxiliary gate-board of inlet valve seat upside and/or the positive stop lug boss downside of auxiliary gate-board plane place adopt resistance to wear, the built-up welding of scrape resistence hard material and processing after form overlaying surface.
At upside and the downside of the convex shoulder of Stem Mut, belleville spring is set.
The bottom of body cavity is set to semispherical surface.The basic shape of the outer surface at this position is also semispherical surface simultaneously.
The invention has the beneficial effects as follows: valve has low flow resistance characteristic, can effectively reduce crushing and the energy consumption of unit and system, there is good sealability and sealing reliability, working life is more lasting, in the time that using, middle worst hot case is difficult for occurring the dead phenomenon of wedge, simple and reasonable, switching motion is reliable, easy to maintenance.
Brief description of the drawings
It shown in Fig. 1 and Fig. 2, is the schematic diagram of two kinds of typical structures of existing bracing type gate valve with two flat plates.
Fig. 3 is the structural representation of an embodiment with pod apertures expansion type parallel double-gate-plate gate valve proposed by the invention.
Fig. 4 is the local enlarged diagram at the flashboard assembly position of an embodiment of valve mechanism proposed by the invention.
Fig. 5 is the main gate-board structural representation of embodiment.
Fig. 6 is the auxiliary gate-board structural representation of embodiment.
Fig. 7 is the schematic diagram of the means of fixation of spring seat on main gate-board.
Fig. 8 is the schematic diagram of the valve body guiding groove of embodiment.
In figure, 1, valve body, 1-1, the spacing plane of auxiliary gate-board, 1-2, guiding groove; 2, outlet valve seat, 2-1, sealing surface; 3, import valve seat, 3-1, sealing surface; 4, main gate-board, 4-1, sealing surface, 4-2, pod apertures, 4-3, T-slot, 4-4, circular bosses, 4-5, main gate-board hook together T groove, 4-6, rectangular through holes, 4-7, clamp locating slot, 4-8, guiding rib; 5, auxiliary gate-board, 5-1, sealing surface, 5-2, positive stop lug boss, 5-3, circular bosses, 5-4, auxiliary gate-board hook together T groove, 5-5, spring force pressure-bearing surface; 6, spring; 7, spring seat, 7-1, pedestal, 7-2, square body, 7-3, restraining groove; 8, clamp, 8-1, plate body part, 8-2, defining flange; 9, valve gap; 10, valve rod; 11, guide plate; 12, column; 13, Stem Mut; 14, belleville spring.
Embodiment
Below in conjunction with drawings and Examples, technological scheme of the present invention is further elaborated.
Valve as designed in Fig. 3 is the structural representation of 1000MW ultra supercritical unit water supply system heat pump outlet electric gate valve.Design pressure/the temperature of valve is 40.92MPa/302.4 DEG C, latus rectum DN400, and the material of valve body, valve gap and major-minor flashboard is WB36 steel, valve body is to process after solid forging.
As shown in Fig. 3～Fig. 6, it is the concrete structure schematic diagram of valve, its major part comprises valve body (1), outlet valve seat (2), import valve seat (3), main gate-board (4), auxiliary gate-board (5), spring (6), spring seat (7), clamp (8), valve gap (9), valve rod (10) etc., outlet valve seat (2) and import valve seat (3) are welded on valve body (1), weld rear weld seam and gone up lathe with nothing left one time together with valve internal channel, ensured that passage has minimum flow resistance; The sealing surface of two valve seats is parallel to each other, and main gate-board (4) is positioned at valve outlet side.The basic technical scheme of this valve and major technique key are: main gate-board (4) fits with monocline face with auxiliary gate-board (5), on main gate-board (4) and auxiliary gate-board (5), to be respectively arranged with diameter be the 50%-60% of sealing surface of seat internal diameter, slightly protrude from circular bosses (4-4) and the circular bosses (5-3) of ambient surface, and boss plane is the faying surface of major and minor flashboard; The upper and lower sides that is positioned at circular bosses at main gate-board (4) and auxiliary gate-board (5) be provided with taking T-slot structure mutually hook together, bearing of trend hooks together T groove (4-5) and auxiliary gate-board hooks together T groove (5-4) as the main gate-board of substantially horizontal, main gate-board hooks together the groove interior edge face that T groove (4-5) and auxiliary gate-board hook together T groove (5-4) and leaves enough gaps that can allow auxiliary gate-board (5) move up and down along the true dip direction of major and minor flashboard faying surface; Be provided with pod apertures (4-2) in the lower end of main gate-board (4), while moving to enable possition on main gate-board (4), pod apertures (4-2) and valve passage hole substantially aligns and the both ends of the surface of pod apertures (4-2) and outlet sealing surface of seat (2-1) and import sealing surface of seat (3-1) between leave little gap; Be provided with positive stop lug boss (5-2) in the upper end of auxiliary gate-board (5), the plane of positive stop lug boss (5-2) downside in the time that auxiliary gate-board (5) is displaced downwardly to closed position with import valve seat (3) upside plane---the spacing plane of auxiliary gate-board (1-1) contacts.
When valve closing, when the plane of positive stop lug boss (5-2) downside on auxiliary gate-board (5) contacts with the spacing plane of auxiliary gate-board (1-1) of import valve seat (3) upside, auxiliary gate-board (5) just stops moving down and main gate-board (4) continuation decline, main gate-board (4) by two circular bosses (4-4) and (5-3) inclined-plane effect promote auxiliary gate-board (5) sealing surface (5-1) be affixed to the sealing surface (3-1) of import valve seat (3) and be adjacent to, simultaneously, main gate-board (4) is also adjacent to and reaches sealing state with the sealing surface (2-1) of outlet valve seat (2) under wedging power and pressure medium effect, the diameter less (being only the 50%-60% of sealing surface of seat internal diameter) of the surface of contact of the major and minor flashboard that major and minor flashboard structure while two circular bosses that flashboard is split pattern form, thus this can produce the sealing that certain compensation is conducive to valve by contributing in the time that the angle of wedge is processed with the anastomose property of micro-error effect sealing pair.On major and minor flashboard, arrange inside and outside in opposite directions hook together T groove, can retrain auxiliary gate-board (5) can only move up and down along bevel direction under the state of pressing close to main gate-board (4), in the time that auxiliary gate-board (5) moves down with respect to main gate-board (4), the shelves of opening of flashboard assembly zoom in, and can between the sealing surface of two valve seats, move smoothly.After valve opening, pod apertures (4-2) and valve body, the valve base channel hole of main gate-board (4) align, and formed media flow is had to lower flow resistance and the pressure loss, desirable runner as direct piping.
In addition, the present embodiment also has some other function that is intended to realize better this product simultaneously, improves the additional further technological scheme of the Performance And Reliability of product, and the technological scheme that these are concrete and effect thereof or action principle are as following:
Valve rod (10) is connected with T-slot Placement with main gate-board (4), is provided with the T-slot (4-3) of bearing of trend perpendicular to sealing surface in the upper end of main gate-board (4).Compared with the mode being threaded with employing, T-slot Placement has been avoided inhomogeneous stressed and even elasticity or the plastic bending deformation due to the valve rod that inevitably foozle is brought after flashboard cuts out.
At the upper end position of auxiliary gate-board (5), be positioned at positive stop lug boss (5-2) both sides and be provided with two spring seats (7) that are fixed on main gate-board (4), the main body of spring seat (7)---on pedestal (7-1), have counterbore down, in counterbore, place spring (6), the axial direction of counterbore and spring (6) is parallel to the direction on the laminating inclined-plane of main gate-board (4) and auxiliary gate-board (5); The corresponding position that is positioned at spring (6) lower end at auxiliary gate-board (5) is processed with the plane perpendicular to spring (6) axial direction---spring force pressure-bearing surface (5-5), this plane the direction perpendicular to the laminating inclined-plane of main gate-board (4), auxiliary gate-board (5).The means of fixation of described spring seat (7) on main gate-board (4) is: on main gate-board (4), have two rectangular through holes perpendicular to sealing surface direction (4-6) (referring to Fig. 5 and Fig. 7), the right-hand member of spring seat (7) is for can insert rectangular through holes (4-6), length is also greater than the square body (7-2) of rectangular through holes (4-6), the cross section of the scope side of being greater than, the longitudinal cross-section body (7-2) of pedestal (7-1) part of spring seat (7) side's of being positioned at body (7-2) left end, the part of stretching out rectangular through holes (4-6) right-hand member at the square body (7-2) of spring seat (7) vertically has restraining groove (7-3), be provided with clamp locating slot (4-7) in the bottom of the T-slot (4-3) of main gate-board (4), T-shaped, the width of the clamp locating slot (4-7) on width and the main gate-board (4) of its plate body part (8-1) of clamp (8) of platy structure quite and be installed in clamp locating slot (4-7), the position that the end of clamp (8) right-hand member projection is positioned at the restraining groove (7-3) on spring seat (7) at it is provided with defining flange (8-2), when clamp (8) is installed, defining flange (8-2) can snap in restraining groove (7-3), after valve assembling, the lower end surface of valve rod (10) is positioned at the upside of clamp (8).
Spring (6) is downward along bevel direction to the thrust direction of auxiliary gate-board (5), when valve opening, auxiliary gate-board (5) hooks together under T groove (4-5) and constraint (5-4) this thrust and major and minor flashboard, move down and remain on extreme lower position along bevel direction, the shelves of opening of flashboard assembly are drawn in as minimum, so as close and opening process in can between two sealing surface of seats, move smoothly.Valve is in the time of assembling, can block through the spring seat (7) of rectangular through holes (4-6) and guarantee that it can not deviate from by the defining flange (8-2) on clamp (8), after valve rod (10) packs into, withstand clamp (8) and can make again clamp (8) remain on set position can not to be shifted.Spring seat (7) adopts this means of fixation to fix, simple in structure and reliable, assembles, keeps in repair all very convenient.
Circular bosses (5-3) on circular bosses (4-4) and auxiliary gate-board (5) on main gate-board (4) be adopt resistance to wear, the built-up welding of scrape resistence hard material and processing after form overlaying surface.The laminating inclined-plane of many its major and minor flashboards of product of existing expansion type parallel double-gate-plate gate valve generally all adopts by bulk material and processes, anti-scuffing function is poor, also can greatly increase the switching motion that friction factor makes valve and become unreliable after simultaneously surface oxidising corrosion; Although some producer has also taked simple surface protection to process but because strengthened layer thinner thickness, body material are excessively soft, in fact the ability that scrape resistence destroys can not meet the demands completely; If laminating inclined-plane produces scratch, the switching motion that makes valve is gone wrong, and even make sealing surface produce scratch, valve opening moment of torsion also has larger increase.Therefore, the present invention piles postwelding reprocessing circular bosses at major and minor flashboard laminating inclined-plane place, and the one, antirust, the 2nd, improvement is resistance to worn, antifraying property.
Certain limit in sealing surface (4-1) side of main gate-board (4) and sealing surface (5-1) side of auxiliary gate-board (5), sealing surface internal diameter, be provided with and remove the recessed structure of certain material, the bottom surface of recessed portion is ramped bottom surface consistent with the true dip direction on the laminating inclined-plane of main gate-board (4), auxiliary gate-board (5).The effect that main gate-board (4) and auxiliary gate-board (5) both sides are designed to be recessed into, except removing unnecessary material weight reduction, main object is to reduce the rigidity of flashboard for appropriateness, in the time that the anastomose property of sealing surface is slightly poor, can there is micro-elastic compensating effect, by this elastic compensating effect and dwindle two flashboards laminatings inclined-planes contact range and area, adopted this three's of double-flashboard structure comprehensive function, can improve preferably the identical state of sealing pair while closing, improve the sealing of valve.
The connection of valve body (1) and valve gap (9) and sealing configuration are, with double-screw bolt, nut, flange and Sealing in body, lid are carried out to fastening bolt linkage structure.Why the connection of body, lid and sealing do not adopt pressure sealing structure and adopt bolt linkage structure, its object has two: the one, and the axial position of its valve gap of pressure sealing structure is in quick condition, being difficult to ensure accurately aligning of the rear flashboard pod apertures of valve rod unlatching and valve passage hole, there is not this problem in bolt linkage structure; The 2nd, owing to adopting, the sealing reliability of pressure sealing structure of stress metal seal ring is relatively not good enough---and is exactly abroad based on this reason as flange in the high pressure valve product of VELAN valve company mainly adopts bolt linkage structure, thereby while adopting bolt linkage structure, can makes body at metal o-ring place employing multi-sealing structure, cover joint and there is excellent sealability.Adopt bolt linkage structure also to reduce valve body lumen height and valve whole height, simplified valve mechanism simultaneously, and also more convenient maintenance.
The guide structure that main gate-board (4) moves up and down in valve body (1) is: on main gate-board (4), arrange guiding groove (1-2) (referring to Fig. 5 and Fig. 8) is set in guiding rib (4-8), valve body (1).On flashboard, guiding rib being set and guiding groove is set on valve body is the size in order to reduce guide structure on flashboard, facilitates the structural design of flashboard, reduces boundary dimension and the weight of flashboard.
The position being positioned at outside valve body cavity at valve rod (10) arranges anti-rotation guide structure, described anti-rotation guide structure comprises the guide plate (11) being fixed on valve rod (10), the column (12) that is positioned at valve gap (9) upside, and guide plate (11) can slide up and down along column (12).Valve rod upper end arranges anti-rotation guide structure, can avoid flashboard assembly in the time closing, to be subject to the torsion that valve rod applies by T-slot position closing motion is produced and disturbed and shadow noon, guarantee valve reliably working.
Be positioned at the spacing plane of auxiliary gate-board (1-1) of inlet valve seat (3) upside and/or positive stop lug boss (5-2) downside of auxiliary gate-board (5) plane place adopt resistance to wear, the built-up welding of scrape resistence hard material and processing after form overlaying surface.In the time closing, there is relative sliding in these two planes, for more important valve, contact surface be resistance to wear, scratch-resistant hard surface will be conducive to improves the reliability of valve closing action.
At upside and the downside of the convex shoulder of Stem Mut (13), belleville spring (14) is set.Upper and lower side at Stem Mut convex shoulder arranges respectively belleville spring, and its effect is for fear of at valve closing with while opening, because the variation of valve rod Yin Wendu is expanded or shrinks, cause flashboard wedge extremely or valve rod and valve gap on sealing surface wedge dead.Therefore and not the upper sealing surface of valve rod and valve gap can produce after the dead phenomenon of wedge; when valve opening, can relievedly upper sealing surface be opened to foot, wedging; except can improve valve stuffing box position sealing reliability, protection filler, be also conducive to make the pod apertures of main gate-board and valve passage hole accurately to align.
The bottom of the inner chamber of valve body (1) is processed as semispherical surface.The basic shape of the outer surface at this position is also semispherical surface simultaneously.Compared with adding the flat pattern of many employings in man-hour with current forged valve intracoelomic cavity bottom, pressure pocket end is that semispherical surface makes stressed more reasonable in the time of high pressure operating mode of valve body, stress distribution is even, thereby safety reliability is higher, and weight is lighter simultaneously, profile is more attractive in appearance.
In conjunction with an embodiment and corresponding accompanying drawing, the specific embodiment of the present invention is described above, but these explanations can not be understood to limit scope of the present invention.Those skilled in the art should know; the present invention is not restricted to the described embodiments; its protection domain is defined by appending claims; any not exceeding the various changes in the scope that the claims in the present invention book defines, the technological scheme that modification forms; all do not depart from spirit of the present invention and technical spirit, within still can belonging to claim scope of the present invention.
Claims (12)
1. a band pod apertures expansion type parallel double-gate-plate gate valve, comprise valve body (1), outlet valve seat (2), import valve seat (3), main gate-board (4), auxiliary gate-board (5), spring (6), spring seat (7), clamp (8), valve gap (9), valve rod (10), outlet valve seat (2) and import valve seat (3) are welded on valve body (1), the sealing surface of two valve seats is parallel to each other, main gate-board (4) is positioned at valve body (1) outlet side, it is characterized in that: main gate-board (4) fits with monocline face with auxiliary gate-board (5), on main gate-board (4) and auxiliary gate-board (5), be respectively arranged with diameter and be less than sealing surface of seat internal diameter, slightly protrude from circular bosses (4-4) and the circular bosses (5-3) of ambient surface, boss plane is main, the faying surface of auxiliary gate-board, the upper and lower sides that is positioned at circular bosses at main gate-board (4) and auxiliary gate-board (5) be provided with taking T-slot structure mutually hook together, bearing of trend hooks together T groove (4-5) and auxiliary gate-board hooks together T groove (5-4) as the main gate-board of substantially horizontal, main gate-board hooks together the groove interior edge face that T groove (4-5) and auxiliary gate-board hook together T groove (5-4) and leaves enough gaps that can allow auxiliary gate-board (5) move up and down along the true dip direction of major and minor flashboard faying surface, be provided with pod apertures (4-2) in the lower end of main gate-board (4), while moving to enable possition on main gate-board (4), pod apertures (4-2) and valve passage hole substantially aligns and the both ends of the surface of pod apertures (4-2) and outlet sealing surface of seat (2-1) and import sealing surface of seat (3-1) between leave little gap, be provided with positive stop lug boss (5-2) in the upper end of auxiliary gate-board (5), the plane of positive stop lug boss (5-2) downside in the time that auxiliary gate-board (5) is displaced downwardly to closed position with import valve seat (3) upside plane---the spacing plane of auxiliary gate-board (1-1) contacts.
2. band pod apertures expansion type parallel double-gate-plate gate valve according to claim 1, it is characterized in that: valve rod (10) is connected with T-slot Placement with main gate-board (4), be provided with the T-slot (4-3) of bearing of trend perpendicular to sealing surface in the upper end of main gate-board (4).
3. band pod apertures expansion type parallel double-gate-plate gate valve according to claim 1, it is characterized in that: at the upper end position of auxiliary gate-board (5), be positioned at positive stop lug boss (5-2) both sides and be provided with two spring seats (7) that are fixed on main gate-board (4), the main body of spring seat (7)---on pedestal (7-1), have counterbore down, in counterbore, place spring (6), the axial direction of counterbore and spring (6) is parallel to the direction on the laminating inclined-plane of main gate-board (4) and auxiliary gate-board (5); The corresponding position that is positioned at spring (6) lower end at auxiliary gate-board (5) is processed with the plane perpendicular to spring (6) axial direction---spring force pressure-bearing surface (5-5), this plane the direction perpendicular to the laminating inclined-plane of main gate-board (4), auxiliary gate-board (5).
4. band pod apertures expansion type parallel double-gate-plate gate valve according to claim 3, it is characterized in that: the means of fixation of described spring seat (7) on main gate-board (4) is: on main gate-board (4), have two rectangular through holes perpendicular to sealing surface direction (4-6), the right-hand member of spring seat (7) is for can insert rectangular through holes (4-6), length is also greater than the square body (7-2) of rectangular through holes (4-6), the cross section of the scope side of being greater than, the longitudinal cross-section body (7-2) of pedestal (7-1) part of spring seat (7) side's of being positioned at body (7-2) left end, the part of stretching out rectangular through holes (4-6) right-hand member at the square body (7-2) of spring seat (7) vertically has restraining groove (7-3), be provided with clamp locating slot (4-7) in the bottom of the T-slot (4-3) of main gate-board (4), T-shaped, the width of the clamp locating slot (4-7) on width and the main gate-board (4) of its plate body part (8-1) of clamp (8) of platy structure quite and be installed in clamp locating slot (4-7), the position that the end of clamp (8) right-hand member projection is positioned at the restraining groove (7-3) on spring seat (7) at it is provided with defining flange (8-2), when clamp (8) is installed, defining flange (8-2) can snap in restraining groove (7-3), after valve assembling, the lower end surface of valve rod (10) is positioned at the upside of clamp (8).
5. band pod apertures expansion type parallel double-gate-plate gate valve according to claim 1, is characterized in that: the circular bosses (5-3) on circular bosses (4-4) and auxiliary gate-board (5) on main gate-board (4) be adopt resistance to wear, the built-up welding of scrape resistence hard material and processing after form overlaying surface.
6. band pod apertures expansion type parallel double-gate-plate gate valve according to claim 1, it is characterized in that: certain limit in sealing surface (4-1) side of main gate-board (4) and sealing surface (5-1) side of auxiliary gate-board (5), sealing surface internal diameter, be provided with and remove the recessed structure of certain material, the bottom surface of recessed portion is ramped bottom surface consistent with the true dip direction on the laminating inclined-plane of main gate-board (4), auxiliary gate-board (5).
7. band pod apertures expansion type parallel double-gate-plate gate valve according to claim 1, is characterized in that: the connection of valve body (1) and valve gap (9) and sealing configuration are, with double-screw bolt, nut, flange and Sealing in body, lid are carried out to fastening bolt linkage structure.
8. band pod apertures expansion type parallel double-gate-plate gate valve according to claim 1, is characterized in that: the guide structure that main gate-board (4) moves up and down in valve body (1) is: on main gate-board (4), arrange in guiding rib (4-8), valve body (1) guiding groove (1-2) is set.
9. band pod apertures expansion type parallel double-gate-plate gate valve according to claim 1, it is characterized in that: the position being positioned at outside valve body cavity at valve rod (10) arranges anti-rotation guide structure, described anti-rotation guide structure comprises the guide plate (11) being fixed on valve rod (10), the column (12) that is positioned at valve gap (9) upside, and guide plate (11) can slide up and down along column (12).
10. band pod apertures expansion type parallel double-gate-plate gate valve according to claim 1, is characterized in that: be positioned at the spacing plane of auxiliary gate-board (1-1) of inlet valve seat (3) upside and/or positive stop lug boss (5-2) downside of auxiliary gate-board (5) plane place adopt resistance to wear, the built-up welding of scrape resistence hard material and processing after form overlaying surface.
11. band pod apertures expansion type parallel double-gate-plate gate valves according to claim 1, is characterized in that: at upside and the downside of the convex shoulder of Stem Mut (13), be provided with belleville spring (14).
12. band pod apertures expansion type parallel double-gate-plate gate valves according to claim 1, is characterized in that: the bottom of the inner chamber of valve body (1) is semispherical surface.The basic shape of the outer surface at this position is also semispherical surface simultaneously.
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| CN201410163103.XA CN103968093B (en) | 2014-04-22 | 2014-04-22 | Propped open type parallel dual-gate valve with deflector hole |
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| CN201410163103.XA CN103968093B (en) | 2014-04-22 | 2014-04-22 | Propped open type parallel dual-gate valve with deflector hole |
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| CN103968093B CN103968093B (en) | 2017-02-01 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108916408A (en) * | 2018-07-16 | 2018-11-30 | 苏州纽威阀门股份有限公司 | A kind of gate valve |
| CN109804188A (en) * | 2016-10-04 | 2019-05-24 | 保尔伍斯股份有限公司 | Gate valve for chemical device |
| CN109812589A (en) * | 2019-03-24 | 2019-05-28 | 百强阀门集团有限公司 | A kind of high guiding performance Wedge Gate Valves that can reduce sealing surface wear |
| CN110107707A (en) * | 2019-06-10 | 2019-08-09 | 浙江金浦实业有限公司 | A kind of elasticity wedging type flat gate valve |
| CN114593219A (en) * | 2022-01-25 | 2022-06-07 | 中国石油化工股份有限公司 | Flat gate valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109804188A (en) * | 2016-10-04 | 2019-05-24 | 保尔伍斯股份有限公司 | Gate valve for chemical device |
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| CN109812589A (en) * | 2019-03-24 | 2019-05-28 | 百强阀门集团有限公司 | A kind of high guiding performance Wedge Gate Valves that can reduce sealing surface wear |
| CN110107707A (en) * | 2019-06-10 | 2019-08-09 | 浙江金浦实业有限公司 | A kind of elasticity wedging type flat gate valve |
| CN114593219A (en) * | 2022-01-25 | 2022-06-07 | 中国石油化工股份有限公司 | Flat gate valve |
| CN114593219B (en) * | 2022-01-25 | 2024-03-26 | 中国石油化工股份有限公司 | Flat gate valve |
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| CN103968093B (en) | 2017-02-01 |
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Address after: 226661, No. 01, building D, bent boat garden, Hu Hu Village, Qu Hu Town, Nantong County, Jiangsu, Haian Applicant after: Zhang Hua Address before: Suzhou City, Jiangsu province 215026 Industrial Park of Suzhou Xinglong Street Tinglan home building 16 room 409 Applicant before: Zhang Hua |
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