CN203604696U - Three-piece type flange connection low-temperature forged steel fixed ball valve - Google Patents
Three-piece type flange connection low-temperature forged steel fixed ball valve Download PDFInfo
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- CN203604696U CN203604696U CN201320666935.4U CN201320666935U CN203604696U CN 203604696 U CN203604696 U CN 203604696U CN 201320666935 U CN201320666935 U CN 201320666935U CN 203604696 U CN203604696 U CN 203604696U
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Abstract
A three-piece type flange connection low-temperature forged steel fixed ball valve is composed of a left valve body, a right valve body, a valve seat arranged between the left valve body and the right valve body, a ball body arranged in the valve seat, a valve rod and a handle. The lower portion of the ball body is fixedly connected with the right valve body through a fixing shaft, and the free end of the fixing shaft is connected with the right valve body in a fastening mode through a fixing shaft press plate and hexagon socket cap screws; the axial joint of the valve seat and the left valve body and the axial joint of the valve seat and the right valve body are respectively provided with a spring and a valve seat graphite pad; the radial joint of the valve seat and the left valve body and the radial joint of the valve seat and the right valve body are respectively provided with an O-shaped ring; a valve body sealing gasket is arranged at the joint of the left valve body and the right valve body; the handle is connected with the upper portion of the ball body through the valve rod, and the back seal part of the is of a spherical structure. A triangular sealing sleeve sealing structure, a valve rod onglet back sealing structure and a micro sawtooth annular sealing butt joint structure are adopted, so that the sealing size is small, efficiency is high, and sealing performance is more reliable; in addition, a handle locking platform is connected with a driver installation platform through threads, and therefore manufacturing cost of the valve is greatly lowered.
Description
Technical field
The utility model belongs to mechanical engineering accessory technical field, and what be specifically related to is that a kind of three pieces type flange connects low temperature forged steel fixing ball valve.
Background technique
Valve is that fluid is carried and the switch of controlling, and all valves have a switch gear, as the ball in ball valve, and the flashboard in gate valve, the flap in stop valve; Valve opening/closing device is arranged in the fluid passage of valve body, has open position and a closed position that stops fluid to pass that allows fluid to pass, and it closes and realize by valve rod from closing to the motion of opening from reaching; Valve rod is all to pass through in vitro handle or pneumatic head or electrical header to handle; Valve rod is external from reaching in valve body or valve gap, needs strict sealing, the closing structure of switch gear or the connection of passage or fixingly also need strict sealing.
Because the sealing configuration of existing valve mechanism exists sealing undesirable, sealingly secure hidden danger is people's urgent problem always, and this case is raw therefrom.
Summary of the invention
The purpose of this utility model is the deficiency for above technology, and a kind of reasonable in design is provided, and the three pieces type flange that temperature is compensated to sealing configuration connects low temperature forged steel fixing ball valve.
Because considering that the task of sealing is fill up butting surface rough and uneven in surface, sealing butting surface is generally all processed by car borer skill, and therefore, the task of sealing is to fill up car boring to process the surface geometry error causing; Machining surface gemoetric error has three kinds of surface roughness, external waviness and surface shape errors; Surface roughness is the surface microscopic gemoetric error of the profile unit width narrower (or wavelength is shorter) that is made up of cutting edge mark, the <50 of its profile unit (width XS/ height Zt); Surface waviness is the surface microscopic gemoetric error of the profile unit's width slightly wide (or wavelength is slightly long) due to processing vibration ,=the 50-1000 of its profile unit (width XS/ height Zt); Surface shape error is that machine tool guideway or workpiece are installed the surperficial macroscopical gemoetric error of profile unit's wider width (or wavelength is longer) due to clamping, the >1000 of its profile unit (width XS/ height Zt); The surface shape error wavelength that seal f ace width causes much smaller than machine tool guideway parallelism and perpendicularity, is reflected in and can ignores to the surface shape error on front cover, and the surface shape error that workpiece is installed due to clamping should and can be avoided; Common car boring manufacturing process belongs to slightly meticulous machining category, needs to use slightly high spindle speed and slightly thin feed speed, and the wavelength of the surface waviness due to vibration is shorter, and the wavelength of the roughness of sword mark formation is shorter; What therefore sealing will be filled up is the rough and uneven in surface of microcosmic surface waviness finer and smoother on butting surface and roughness magnitude.
Because conventional sealing material is in certain normal temperature scope, other material is at certain high temperature range, nearly all that the mutual not stall in crystal region and amorphous tagma is changed and the viscoelastic material coexisting, and crystal region causes the aobvious solidified phase characteristics of material, has intensity and rigidity, amorphous tagma causes material aobvious liquid phase characteristics, toughness and elasticity; The mobility of liquid phase ingredient can cause the pressure of sealing gasket to transmit isotropy, and no matter medium acting surface is parallel or vertical with sealing surface, all likely pad surface pressure is converted to totally to the sealing load of sealing surface; The volume invariability of liquid phase ingredient can cause the sealing gasket in die compaction, as the hydraulic oil in oil cylinder, as long as there is superpower anti-pressure ability--and it is enough little to extrude gap, just will never be racked; The viscosity of liquid phase ingredient can cause sealing gasket response lag stress, or it is lax or cause sealing gasket cold flow to cause padding Sealing Stress, causes seal failure; The viscosity of liquid phase ingredient also can cause the pressure transmission of sealing gasket highly to be successively decreased; The steadiness of solid phase composition can cause the compressive stress of sealing gasket, at the most can only be by Poisson's ratio and Hooke's law, reduce by half and convert the extension stress (because the Poisson of conventional sealing material system is less than 0.5) on its orthogonal direction to, therefore, likely can only be by the surface pressure of selfsealings pad, convert other direction to, convert the Sealing Stress of orthogonal direction by Poisson's ratio to by projection; So, the softer resilient rubbber cushion of quality almost can be by liquid transfering pressure, the hard pad of quality almost can only be by solid Poisson's ratio and vector transmission of pressure, the medium teflon pad of quality soft or hard can be pressed in liquid phase, macroscopic view and press solid phase transmission of pressure before surrender on microcosmic, can after surrender, in macroscopic view, press liquid phase transmission of pressure.
The structural principle of sealing is, during without pressure medium, structure realizes the necessary minimum nominal stress y of initial sealing should be enough little, little when having pressure medium, the sealing of structure maintains coefficient or anti-interference Coefficient m (the seal action power FS/ medium of=structure removes seal action power Fu) is meaningful, be little when having pressure medium, the sealing of structure is determined by m: when m=1, seal action power (the FS)=medium-tight active force (Fu) of structure, structure is in sealing and non-tight threshold state, m is a bit larger tham 1 o'clock, structure seals the state of maintaining, m is larger than 1, the ability that structure maintains sealing is stronger, reliability is higher, that is to say that the little m when having pressure medium of y value when design of Sealing Structure is first to make it without pressure medium is meaningful, then make its m>1.
As previously mentioned, without saw-tooth ring docking, because pad is softer than docking metal, therefore, generally all can realize initial sealing by bearing that part of prefastened power of maximal work pressure if use pad; So any sealing docking structure, as long as appropriate application microcosmic saw-tooth ring and cushion, all can maintain coefficient or anti-interference Coefficient m (medium on the seal action power FS/ sealing surface of=structure removes seal action power Fu) is greater than 1 design and examination by sealing.
Basic sealing structure for trough pad, softer than docking metal surface material as the nonmetallic material of pad sealing, be easy to eliminate the original leakage of docking metal surface, but but bring docking new leakage--along the leakage that penetrates of microgap in pad material; No matter be motive sealing or static seal, effectively stop the key that medium leaks along sealing surfaces passage to be to give enough contact pressure stress so that pad material is fully filled up the rough and uneven in surface of butting surface to pad sealing surface, effectively stop medium to be along the key of pad material internal channel leakage simultaneously each to giving enough pressure stress fully to close microgap mouth in pad material to pad, and do not mind that extruding force is from interface or pressure medium; Because the transmission of power in viscous liquid material successively decreased, the transmission of power in elastic solid material is to have in length and breadth other, therefore, the open compression of the sealing gasket that solid phase under normal temperature and liquid phase are coexisted can not make pad respectively be subject to the extruding of same degree to surface simultaneously and effectively close each road leakage way at it, in other words, only have closed compression sealing gasket just likely to make pad respectively be subject to the crowded cash of same degree to surface simultaneously and effectively close medium simultaneously and penetrate along the leakage way of sealing surface and medium the leakage way of pad material at it; In addition, sealing material in closed compression, just as the hydraulic oil in oil hydraulic cylinder, as long as enough little between extruding, just will never be racked, therefore, can say, no matter optimal pad sealing configuration, be by mechanical force being installed or compressing by pressure medium, should be all the sealing structure for trough pad that pad is subject to closed compression.
The utility model is achieved through the following technical solutions: three pieces type flange connects low temperature forged steel fixing ball valve, by left and right valve body, be located at the valve seat between the valve body of left and right, spheroid, valve rod and the handle being located in valve seat forms; The bottom of spheroid is fixedly connected with right valve barrel by stationary axle, and the free end of this stationary axle is fastenedly connected by stationary axle pressing plate and interior hexagonal cylindrical screw and right valve barrel; The axial joint of valve seat and left and right valve body is respectively equipped with spring and valve seat graphite pads, and this spring is provided in a side of in spring seat; The radially joint of valve seat and left and right valve body is respectively equipped with O shape circle; Between the connection of left and right valve body, be provided with valve seal pad; The connection part of left and right valve body is sealing butt-joint structure of microcosmic saw-tooth ring and sealing structure for trough pad; Described handle couples together by valve rod and spheroid top, and valve rod back seal place is spherical structure.
Between described valve seat and spheroid, be also provided with valve seat insert.
Described left and right valve body is to fix by nut and stud.
Described valve seal pad is set to sealing butt-joint structure of microcosmic saw-tooth ring, because the initial contact of sealing butt-joint structure of microcosmic saw-tooth ring is line contact, material is harder, area of contact more approaches zero, therefore, can say, no matter how how hard by force material is, docking structure is contacted and is realized the required active force of initial sealing all as the soft material by line, all can be as small as and ignores; That is to say, no matter material is hard or soft, as long as application microcosmic saw-tooth ring sealing configuration in good time, any docking structure is to realize that part of required power of initial sealing all can accomplish to ignore, or any docking structure is realized the necessary minimum Sealing Stress y of sealing and all can be accomplished to ignore during without pressure medium.
The lower end of described valve rod is provided with valve stem sleeve and anti-static device.
Between being connected of the upper end of valve rod and handle, be provided with valve rod gland, the joint, upper end of valve rod gland and valve rod is provided with valve rod thrust pad, delta seal cover and filler pressing sleeve and seals completely; Because delta seal cover is directly subject to radial pressure and highly symmetrically, therefore, have that leakage efficiency is high, Compensation Regulation is sensitive, the wear-resisting feature such as lasting.
The upper end of described valve rod is ball wedge back seal structure.
Described valve rod thrust pad is inclined-plane wedge-like structure.
The benchmark architecture in described valve seat cross section is equilateral triangle.
The beneficial effects of the utility model embody and are: compared with prior art, the utility model, owing to adopting the sealing of delta seal cover, valve rod ball wedge back seal and sealing butt-joint structure of microcosmic saw-tooth ring, makes sealed volume little, and efficiency is high, and sealability is more reliable; Handle locking platform adopts and is threaded with driver mountion plate in addition, and this will reduce the manufacture cost of valve greatly.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in detail.
Fig. 1 is the utility model cross section structure schematic diagram.
Following is the concrete title of each mark in figure: 1 right valve barrel, 2 springs, 3 valve seat graphite pads, 4 O shape circles, 5 interior hexagonal cylindrical screws, 6 stationary axle pressing plates, 7 stationary axle, 8 fixed axle sleeves, 9 valve seal pads, 10 valve seat inserts, 11 valve seats, 12 spring seats, 13 left valve barrels, 14 spheroids, 15 anti-static devices, 16 valve rods, 17 valve rod glands, 18 delta seal covers, 19 filler pressing sleeves, 20 handles, 21 valve rod thrust pads.
Embodiment
As shown in Figure 1, three pieces type flange connects low temperature forged steel fixing ball valve, by left and right valve body (13,1), be located at the valve seat 11 between left and right valve body (13,1), spheroid 14, valve rod 16 and the handle 20 being located in valve seat 11 forms; The bottom of spheroid 14 is fixedly connected with right valve barrel 1 by stationary axle 7, and stationary axle is mounted in fixed axle sleeve 8, and the free end of this stationary axle 7 is fastenedly connected with right valve barrel 1 by stationary axle pressing plate 6 and interior hexagonal cylindrical screw 5; Valve seat 11 is respectively equipped with spring 2 and valve seat graphite pads 3 with the axial joint of left and right valve body (13,1), and this spring 2 is provided in a side of in spring seat 12; Valve seat 11 is respectively equipped with O shape circle 4 with the radially joint of left and right valve body (13,1); Between the connection of left and right valve body (13,1), be provided with valve seal pad 9; The connection part of left and right valve body (13,1) is sealing butt-joint structure of microcosmic saw-tooth ring and sealing structure for trough pad; Described handle 20 couples together by valve rod 16 and spheroid 14 tops, and valve rod 16 back seal places are spherical structure.
Between described valve seat 11 and spheroid 14, be provided with valve seat insert 10.
Described left and right valve body (13,1) is to fix by nut and stud.
Described valve seal pad 9 is sealing butt-joint structure of microcosmic saw-tooth ring; This sealing butt-joint structure of microcosmic saw-tooth ring can be suitable as various surfaces, as plane and plane, and the conical surface and the conical surface or sphere, the Butt sealing structure of sphere and sphere or the conical surface etc.; In fact, as long as on the slightly protruding face that has docking saw-tooth ring structure, by the surface shape error profile wave height due to machine tool guideway parallelism and perpendicularity and workpiece deformation, be not more than the surface waviness profile unit height due to cutting vibration and be not more than the surface roughness profile unit height due to cutting edge mark, so, all reliable slightly large microcosmic saw-tooth ring of tooth depth sealings that achieves a butt joint of all surface docking.
The lower end of described valve rod 16 is provided with valve stem sleeve and anti-static device.
Between being connected of the upper end of valve rod 16 and handle 20, be provided with valve rod gland 17, valve rod gland 17 is provided with valve rod thrust pad 21, delta seal cover 18 and filler pressing sleeve 19 with the joint, upper end of valve rod 16 and seals completely; Because delta seal cover 18 is directly subject to radial pressure and highly symmetrically, therefore, have that leakage efficiency is high, Compensation Regulation is sensitive, the wear-resisting feature such as lasting.
The upper end of described valve rod 16 is ball wedge back seal structure.
Described valve rod thrust pad 21 is inclined-plane wedge-like structure, has effectively improved the reliability of sealing.
The benchmark architecture in valve seat 11 cross sections is equilateral triangle, the task of valve seat 11 has been that switch spheroid 14 docks with the oblique angle of left and right valve body (13,1), therefore, 11 at least three surfaces at an angle to each other of valve seat: sealing surface to valve body of sealing surface to switch spheroid, and ask the equilibrium of forces supporting surface of valve body; Its three of this equilateral triangle section valve seats equate stressed and not etc. lifting surface area (because of turning radius difference) just in time expire ideally in the demand of each unequal stress, the ball sealing surface that stress is slightly large just in time meets its motive sealing to ball, the body sealing surface that stress is slightly little just in time meets its static seal to body, and stress more slightly little supporting surface just in time meets its slip on supporting ring; Moreover, only have equilateral triangle cross section just can avoid valve seat to occur being less than the weak wedge angle of 60 degree; Therefore be, cross section if valve seat must meet equilateral triangle.
Claims (6)
1. three pieces type flange connects low temperature forged steel fixing ball valve, by left and right valve body, be located at the valve seat between the valve body of left and right, spheroid, valve rod and the handle being located in valve seat forms; It is characterized in that: the bottom of spheroid is fixedly connected with right valve barrel by stationary axle, the free end of this stationary axle is fastenedly connected by stationary axle pressing plate and interior hexagonal cylindrical screw and right valve barrel; The axial joint of valve seat and left and right valve body is respectively equipped with spring and valve seat graphite pads, and this spring is provided in a side of in spring seat; The radially joint of valve seat and left and right valve body is respectively equipped with O shape circle; Between the connection of left and right valve body, be provided with valve seal pad; The connection part of left and right valve body is sealing butt-joint structure of microcosmic saw-tooth ring and sealing structure for trough pad; Handle couples together by valve rod and spheroid top, and valve rod back seal place is spherical structure.
2. three pieces type flange according to claim 1 connects low temperature forged steel fixing ball valve, it is characterized in that: between being connected of the upper end of valve rod and handle, be provided with valve rod gland, the joint, upper end of valve rod gland and valve rod is provided with valve rod thrust pad, delta seal cover and filler pressing sleeve and seals completely.
3. three pieces type flange according to claim 2 connects low temperature forged steel fixing ball valve, it is characterized in that: the upper end of valve rod is ball wedge back seal structure.
4. three pieces type flange according to claim 2 connects low temperature forged steel fixing ball valve, it is characterized in that: valve rod thrust pad is inclined-plane wedge-like structure.
5. three pieces type flange according to claim 1 connects low temperature forged steel fixing ball valve, it is characterized in that: the benchmark architecture in valve seat cross section is equilateral triangle.
6. three pieces type flange according to claim 1 connects low temperature forged steel fixing ball valve, it is characterized in that: valve seal pad is set to sealing butt-joint structure of microcosmic saw-tooth ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320666935.4U CN203604696U (en) | 2013-10-28 | 2013-10-28 | Three-piece type flange connection low-temperature forged steel fixed ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320666935.4U CN203604696U (en) | 2013-10-28 | 2013-10-28 | Three-piece type flange connection low-temperature forged steel fixed ball valve |
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| Publication Number | Publication Date |
|---|---|
| CN203604696U true CN203604696U (en) | 2014-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320666935.4U Expired - Fee Related CN203604696U (en) | 2013-10-28 | 2013-10-28 | Three-piece type flange connection low-temperature forged steel fixed ball valve |
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| Country | Link |
|---|---|
| CN (1) | CN203604696U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107842629A (en) * | 2017-12-01 | 2018-03-27 | 中亚阀门有限公司 | A kind of compound dual low temperature resistant ball valve |
-
2013
- 2013-10-28 CN CN201320666935.4U patent/CN203604696U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107842629A (en) * | 2017-12-01 | 2018-03-27 | 中亚阀门有限公司 | A kind of compound dual low temperature resistant ball valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140521 Termination date: 20151028 |
|
| EXPY | Termination of patent right or utility model |