CN204628719U - The smithwelding valve body structure of side steam discharge electromagnetic relief valve - Google Patents

Abstract

The utility model discloses the smithwelding valve body structure of a kind of side steam discharge electromagnetic relief valve, described smithwelding valve body is bilateral steam exhaust structure, by valve body part be positioned at the steam discharge flange of its left and right side and be positioned at the plate-side plate welding of side before and after it and form.The middle part of valve body part is processed with exhaust vent hole in left-right direction, and side, front and back is then processed with horizontal flow hole, upper and lower side, is processed with longitudinally through-flow groove, is closed by welding side plate to through flow hole and through-flow groove between horizontal flow hole; The rotation angle position of through flow hole and through-flow groove is through being processed to form fillet; Side plate top and the bottom are respectively processed with to be charged into, with the projective structure of arcuate surface in horizontal flow hole.Major advantage: make valve no longer there is the problem of oxidation corrosion product and water of condensation impact sealing, make that the switch valve speed of valve improves, Blowdown of a safety valve reduction, stability raising, valve body lumen height reduction, processing maintenance be more convenient, when using under super (super-) critical operating mode, there is higher safety reliability.

Description

The smithwelding valve body structure of side steam discharge electromagnetic relief valve

Technical field

The utility model relates to a kind of valve mechanism, is specifically related to the structural type of the side steam discharge electromagnetic relief valve valve body that a kind of power station main steam system uses.

Background technique

Electromagnetic relief valve is a kind of important safety relief valve of power station main steam (overheated vapour) system, is a kind ofly to drive guide's flap to release steam and make the leading type valve of main valve clack action with the drive unit such as electromagnet.As the equalizing valve of main steam safety valve, electromagnetic relief valve is used for the fast automatic unlatching discharged steam when power station main steam (overheated vapour) pressure exceedes specified value, avoid main steam safety valve action as far as possible, reduce the time of movement of safety valve, thus maintain the Performance And Reliability of main steam safety valve, the use technology cycle of prolongation main steam safety valve, make the safety assurance ability that unit keeps enough, and ensure balance and the stable operation of unit, be important mating valve and the critical valves of fired power generating unit.The electromagnetic relief valve that jumbo fired power generating unit especially ultra supercritical coal-fired unit uses, under valve is the extremely harsh working condition being operated in temperature >=600 DEG C, pressure 26 ~ 31MPa, thus very high requirement is proposed to the Performance And Reliability of the design of valve, manufacture and valve.

The electromagnetic relief valve of current leading type mainly contains two classes from the structural type of product, one class take the product of the enterprises such as U.S.'s health rope Reed (Dresser-Consolidated) and Crosby (Tyco-Crosby) as the American structure (see Fig. 1) of representative, adopt main valve clack sealing surface upward, top steam discharge, the auxiliary valve form of dividing side to fill, valve body of main valve many employings forge welding structure carries out Design and manufacture; The another kind of employing main valve clack sealing surface that be product that is wild with Japanese ridge and East Asia two company is representative down, left and right bilateral is vented, the structure of main valve and auxiliary valve integral design.The difference of two kinds of valve mechanism types is difference based on valve body structure pattern and defines the different product structure of overall structure.The electromagnetic relief valve product of two kinds of structure types is compared, main valve clack sealing surface upward, top steam discharge, the auxiliary valve American structure of dividing side fill exist relatively more than defect, the familiar lacunas of the product directly brought by this structural type mainly comprises: 1, due to the reason of discharge of steam, the inner chamber of outlet pipe and outlet adpting flange can oxidation corrosion quickly, because valve is top steam exhaust structure, the corrosion products such as scale can drop or accumulate in the flowing of condensed water near main valve clack sealing surface, thus affect valve seal, 2, main valve clack upper-end surface have water of condensation spatter drip even can accumulate water of condensation, can with all the other positions therefore produce the larger temperature difference and sealing surface position be produced be out of shape even to ftracture inside local or whole sealing surface inside sealing surface, cause the use of valve to be affected, 3, the structure of auxiliary valve point side dress makes the spatial volume between main valve clack to guide's flap become larger, when causing guide's flap to be opened the excretion of above-mentioned headspace vapor and guide's flap close after above-mentioned space fill steam and pressure and raise and promote the time lengthening that main valve clack closes, namely valve is from receiving valve opening, close valve signal to completing valve opening, the time of closing valve events is longer, the actuation time of especially closing valve has obvious prolongation, the working sensitivity of valve reduces, be unfavorable for the safe operation ensureing unit, closing valve time postpones to cause Blowdown of a safety valve to increase simultaneously, also be unfavorable for ensureing unit efficiency, 4, an auxiliary valve point side assembling structure causes the stability of auxiliary valve not good enough, and judder during valve steam discharge can affect the functional reliability of auxiliary valve and drive unit.The electromagnetic relief valve product of the leading type that current thermal power generation unit is is at home and abroad installed and used mostly is such electromagnetic relief valve, in a large amount of use problem existing for it, many problems are traced it to its cause and should be summed up as the problem brought due to the impact of product structure pattern as above.And for structural type be main valve clack sealing surface down, left and right bilateral exhaust, the Japanese structure of main valve and auxiliary valve integral design, because the position of exhaust steam pipe and the direction of direction and main valve clack sealing surface are different from above-mentioned American structure, what thus do not have that the oxidation corrosion product of outlet pipe and outlet adpting flange inner chamber and water of condensation bring valve seal has a strong impact on, the all-in-one-piece structure of major-minor valve is also conducive to the speed of response improving valve simultaneously, more effective protection is provided to the safe operation of main steam safety valve and unit, and be conducive to the structure stability improving valve, ensure that valve works more reliably.Due to main valve clack down, bilateral exhaust, major-minor valve monolithic construction the flow passage structure of valve body comparatively complicated (see Fig. 2 and Fig. 3, Fig. 3 is the left-hand sectional view of Fig. 2), thus based on existing product design technology, the valve body of existing product all adopts foundry goods and fails by forging to carry out Design and manufacture.

The high-temperature high pressure valve of Large Copacity fired power generating unit as super (super-) critical fired power generating unit is installed on for supporting, the pressure parts such as valve body should preferentially be selected forging to process on Design and manufacture, valve is made to have better safety reliability, especially for the valve that extra-supercritical unit main steam system uses, the material of pressure part can only select F92 steel, that is valve body must adopt forging to manufacture.As previously mentioned, the electromagnetic relief valve of leading type is as adopted the words of forged steel valve body, need by main valve clack sealing surface upward by existing product design technology valve, top steam discharge, an auxiliary valve point side fills the comparatively simple product structure of this valve flowing channel structure and designs, manufacture, the many familiar lacunas brought therefrom also have impact on the reliable use of product greatly, valve often can need breakdown maintenance or change accessory because of leakage or other operational failure, thus have impact on the normal operation of unit and equipment and add maintenance load and maintenance cost, valve frequently breaks down and also brings larger hidden danger to safety in production.Given this another kind of substituting valve-pneumatic product (forged steel valve body) opening hard seal ball valve arrangement soon arises at the historic moment, and the manufacturer of external fired power generating unit mating valve and home and abroad station user transfer the safety relief valve of product as main steam system more selecting and adopt this hard seal ball valve arrangement.The pneumatic safety relief valve opening hard seal ball valve arrangement soon also exposes many problems in a large amount of uses, as: the tungsten carbide coating of spheroid, valve seat easily comes off, and causes serious interior leakage and bite; The coating of spheroid and valve seat scratches or is difficult to after coming off to repair, and parts replacement cost is high; The opening and closing speed of pneumatic drive main valve events also has larger gap compared with the auxiliary valve of Electromagnetic Drive, causes that the working sensitivity of valve is low, Blowdown of a safety valve is large; Filler and pad place affect by high-temperature high-pressure medium and easily produce leakage.Product behaviour in service causes anxiety equally, and the problem of bringing sometimes to unit operation and maintenance is even even more serious than the electromagnetic relief valve of leading type with impact.

Although main valve clack down, bilateral exhaust, major-minor valve integral design electromagnetic relief valve in product structure pattern and usability, there is comparatively obvious advantage, but structurally also there is shortcoming in the cast steel valve body of existing product: due to the reason of valve lumen design of Sealing Structure, the lumen height of valve body is too high, not only make the welding of the processing of body cavity and valve seat, grinding comparatively difficult, be unfavorable for the workmanship ensureing valve, disassemble or assemble difficulty when also making maintenance, valve disintegration workload is large, spended time is long.

In sum, the supporting electromagnetic relief valve of existing Large Copacity fired power generating unit due to product structural design and manufacture reason and create many familiar lacunas, bring adverse influence to the use and maintenance of the safe operation of fired power generating unit and equipment.Electromagnetic relief valve has become in fired power generating unit mating valve one of the critical valves always existed compared with serious problems, and the problems that electromagnetic relief valve use exists also become long-standing problem power station user, require that the product technology problem of solving as early as possible and must be puted forth effort by product specification manufacturing firm.Especially along with the capacity of fired power generating unit is increasing, temperature and pressure parameter is more and more higher, automaticity is more and more perfect, address this problem and also become more and more urgent.Therefore, if can for the more rational main valve clack sealing surface of structure down, the exhaust of left and right bilateral, main valve and auxiliary valve integral design electromagnetic relief valve structure and the valve body structure of the matching used forged steel valve body of applicable Large Copacity fired power generating unit is proposed, undoubtedly can to solve power station user in the face of the use technology problem of electromagnetic relief valve product time be absorbed in awkward situation that is at one's wit's end, that feel simply helpless and bring useful help, on safe, reliable, the impact that economical operation brings outbalance that ensure power station unit.

Summary of the invention

In order to overcome the above-mentioned deficiency existing for existing product and technology, the utility model proposes a kind of smithwelding valve body structure of brand-new electromagnetic relief valve, its technical problem to be solved is: have structure and usability advantage for existing, but valve body can only produce the main valve clack of product down using foundry goods as blank on Design and manufacture, bilateral is vented, the electromagnetic relief valve structure of major-minor valve integral design and propose a kind of valve body structure of forged steel material, enable the electromagnetic relief valve product of leading type in Large Copacity fired power generating unit especially safety on overcritical and ultra supercritical coal-fired unit, reliably, stably use, solve the use problem of the electromagnetic relief valve product of long-standing problem power station user.

To achieve these goals, the utility model is by the following technical solutions:

The smithwelding valve body structure of a kind of side steam discharge electromagnetic relief valve, described smithwelding valve body is that the left and right sides is all with the bilateral steam exhaust structure of media outlet end, valve flowing channel be medium inlet end from downside upwards when the side canal of both sides, front and back enters valve body lumen, discharge from the valve seat intermediate throughholes be positioned on the downside of valve body lumen shunt again downwards to the left and right both sides to media outlet end, that is the general structure pattern of valve body be with main valve clack down, bilateral is vented, the structure of the cast steel valve body of the electromagnetic relief valve of major-minor valve integral design is corresponding.The major technique of this smithwelding valve body structure is crucial as follows:

Described smithwelding valve body is welded after roughing by valve body part and the steam discharge flange being positioned at its arranged on left and right sides and the side plate that is positioned at its front and rear sides, and postwelding part surface forms the smithwelding valve body of complete side steam discharge electromagnetic relief valve again after fine finishing, the profile of the intermediate portion of valve body part is square structure, be processed with the exhaust vent hole of through circle in left-right direction, before valve body part, rear side, upper horizontal through flow hole is processed with respectively on top, lower horizontal through flow hole is processed with in bottom, lower horizontal through flow hole makes the front and back sides of inlet channel hole and the valve body part of up processing from valve body lower end through, upper horizontal through flow hole then makes the front and back sides of the lumen of valve body and valve body part through, longitudinally through-flow groove is processed with between the lower horizontal through flow hole and the aperture of upper horizontal through flow hole of valve body part front and back sides, plate-side plate welding is in the front and back sides of valve body part, to upper horizontal through flow hole and aperture, lower horizontal through flow hole two ends and longitudinally through-flow groove close, four limits that side plate presses close to valve body surface at it are processed with bevel for welding, after side plate welds with valve body part, longitudinal through-flow groove becomes closed runner makes inlet channel hole be connected with the lumen of valve body by lower horizontal through flow hole and upper horizontal through flow hole.

In order to realize expecting object better, the utility model also adds following further technological scheme simultaneously:

The cross section basic shape of upper horizontal through flow hole, lower horizontal through flow hole and longitudinal through-flow groove is rectangle.

At upper horizontal through flow hole and longitudinal through-flow groove and the lower horizontal through flow hole rotation angle position crossing with longitudinally through-flow groove, 90 ° of corners are through being processed to form fillet, upper at side plate, bottom is respectively processed with a projective structure charged in horizontal flow hole, the horizontal width of projective structure is suitable with the width in corresponding horizontal flow hole, the upper surface of top projective structure is plane, press close to the upper plane of upper horizontal through flow hole, lower surface is the arcuate surface that root connects with side plate interior sides surface, the center line of this arcuate surface is positioned at the inner side on side plate interior sides surface and the downside of this arcuate surface, the lower surface of bottom projective structure is plane, press close to the lower plane of lower horizontal through flow hole, upper surface is the arcuate surface that root connects with side plate interior sides surface, the center line of this arcuate surface is positioned at the inner side on side plate interior sides surface and the upside of this arcuate surface, after side plate welds with valve body part, at the turning point of longitudinal through-flow groove and upper horizontal through flow hole, lower horizontal through flow hole, constituted the circular arc runner turned to gradually by above-mentioned fillet and arcuate surface.

The left and right sides corner crossing with lower horizontal through flow hole in inlet channel hole is processed with arc rotary surface transition.

Be processed with outside thread in the upper end of valve body part, within the flange processed separately, threaded engagement is arranged on middle flange valve body part being formed valve body.

Electromagnetic relief valve described in the utility model, its driving mechanism comprises the driving mechanism being provided active force by electromagnet, and provides the driving mechanism of active force by electromagnetic valve Pneumatic actuator.

The beneficial effects of the utility model are: after the smithwelding valve body structure adopting the technical solution of the utility model to propose, can make structure comparatively reasonably main valve clack down, bilateral exhaust, major-minor valve monolithic construction electromagnetic relief valve product especially on overcritical and ultra supercritical coal-fired unit, obtain safe and reliable application in Large Copacity fired power generating unit, make valve in use no longer there is oxidation corrosion product and water of condensation enters the problem affecting valve seal near main valve clack sealing surface; The switch valve speed of valve improves, Blowdown of a safety valve reduces, and is conducive to ensureing the safe operation of unit and the operational efficiency of unit; Valve has good structure stability, is conducive to ensureing auxiliary valve and driving mechanism reliably working; Valve body lumen height reduces greatly, the processing of body cavity and the welding of valve seat, grind more convenient, be conducive to ensureing the workmanship of valve, the whole height of valve is also reduced simultaneously, during product repairing, disassemble or assemble are convenient, and valve disintegrates simply easily, it is short to expend time in; Valve has higher safety reliability when main steam system high temperature and high pressure condition particularly uses under overcritical and ultra supercritical operating mode.

Accompanying drawing explanation

The main valve clack sealing surface of Tu1Shi U.S. Kang Suo Reed company upward, top steam discharge, auxiliary valve divide the electromagnetic relief valve schematic diagram of side assembling structure.

Fig. 2 be existing main valve clack sealing surface down, the exhaust of left and right bilateral, major-minor valve monolithic construction, cast steel valve body the structural representation at electromagnetic relief valve valve body position.

Fig. 3 is the left-hand sectional view at the electromagnetic relief valve valve body position shown in Fig. 2.

Fig. 4 and Fig. 5 is the integrally-built plan view of valve body and the left view of the utility model embodiment one, two respectively.

Fig. 6 is the sectional view being arranged in Fig. 4 plan view A-A and B-B section place of the utility model embodiment one.

Fig. 7 is the sectional view being arranged in Fig. 4 plan view C-C section place of the utility model embodiment one.

Fig. 8 and Fig. 9 is plan view and the left view of the valve body part of the utility model embodiment one, two.

Figure 10, Figure 11, Figure 12 are the plan view of the lateral plate structure of the utility model embodiment one, left view and plan view respectively.

Figure 13 is the sectional view being arranged in Fig. 4 plan view A-A and B-B section place of the utility model embodiment two.

Figure 14, Figure 15, Figure 16 are the plan view of the lateral plate structure of the utility model embodiment two, left view and plan view respectively.

In figure, 1, valve body part; 2, flange; 3, valve seat; 4, steam discharge flange; 5, side plate; 6, lumen; 7, inlet channel hole; 8, upper horizontal through flow hole; 9, lower horizontal through flow hole; 10, longitudinal through-flow groove; 11, fillet; 12, arcuate surface.

Embodiment

Below in conjunction with accompanying drawing and two embodiments, the technical solution of the utility model is further elaborated.

Embodiment one

Smithwelding valve body as shown in Fig. 4 and Fig. 5, Fig. 6, Fig. 7, for the left and right sides is all with the bilateral steam exhaust structure of media outlet end, valve flowing channel structure is: the medium inlet end from downside upwards, side canal through both sides, front and back enters valve body lumen, downward from the valve seat intermediate throughholes be positioned on the downside of valve body lumen during discharge of steam, shunt both sides to the left and right again and, to media outlet end, drain into safe position by the steam discharge elbow that is connected with the steam discharge flange of outlet end and upright exhaust steam pipe.

The concrete structure of the present embodiment is as follows: the bottom of described smithwelding valve body is the installation connecting end of valve, when the installation Placement of valve is butt welding connection at the lower end of valve body processing butt welding groove, then when valve needs to adopt Flange joint mounting type to connect need arranges in the lower end of valve body and process adpting flange; In the lower end of valve body, be up processed with inlet channel hole (7).Described valve body is welded after roughing by valve body part (1) and the steam discharge flange (4) being positioned at its arranged on left and right sides and the side plate (5) that is positioned at its front and rear sides, and postwelding part surface forms the smithwelding valve body of complete side steam discharge electromagnetic relief valve again after fine finishing.As shown in Figure 8, Figure 9, the profile of the intermediate portion of valve body part (1) is square structure, be processed with the exhaust vent hole of through circle in left-right direction, exhaust vent hole can be connected to relevant steam discharge pipe fitting by the steam discharge flange (4) being welded on valve body part (1) arranged on left and right sides.In the front and rear sides of valve body part (1), be processed with upper horizontal through flow hole (8) respectively on top, be processed with lower horizontal through flow hole (9) in bottom, lower horizontal through flow hole (9) makes the front and back sides of inlet channel hole (7) and the valve body part (1) of up processing from valve body lower end through, and upper horizontal through flow hole (8) then makes the lumen of valve body (6) through with the front and back sides of valve body part (1), front in valve body part (1), between the lower horizontal through flow hole (9) of trailing flank and the aperture of upper horizontal through flow hole (8), and be processed with longitudinally through-flow groove (10), before valve body part (1), trailing flank and be welded with side plate (5) to upper horizontal through flow hole (8) and lower horizontal through flow hole (9) aperture, two ends and longitudinally through-flow groove (10) close (Fig. 6, Fig. 7), the basic shape of side plate (5) periphery is rectangle (Figure 10, Figure 11, Figure 12), its four limits pressing close to valve body part (1) side are processed with bevel for welding, after side plate (5) welds with valve body part (1), longitudinal through-flow groove (10) becomes closed runner makes inlet channel hole (7) be connected with the lumen (6) of valve body by lower horizontal through flow hole (9) and upper horizontal through flow hole (8).

After side plate (5) and steam discharge flange (4) weld with valve body part (1), just define medium and upwards enter lumen (6) by inlet channel hole (7) by the through-flow groove of the longitudinal direction of front and rear sides (10), more then shunted the medium runner (see Fig. 4, Fig. 5) of being discharged by steam discharge flange (4) to the left and right sides by the center-aisle hole of valve seat (3) downwards.

The electromagnetic relief valve be made up of the smithwelding valve body with above-mentioned flow passage structure, because its main valve clack is positioned at valve lumen on valve seat and relative with valve seat, thus the direction of main valve clack sealing surface down, steam-expelling port is also positioned at valve body both sides, and auxiliary valve directly arranges by valve gap and is arranged on the upside of valve body, also the upside of main valve clack can be set directly at for the release little flap of steam of auxiliary valve, therefore the main valve clack that the electromagnetic relief valve be made up of this smithwelding valve body structure and existing Large Copacity fired power generating unit use upward, top steam discharge, the electromagnetic relief valve of auxiliary valve point side dress is compared, overcome existing for this series products: oxidation corrosion product and water of condensation affect valve seal, the time of switch valve action is longer, working sensitivity reduces, Blowdown of a safety valve increases, structure stability is not good enough affects the problems such as the reliability of valve working, simultaneously with existing main valve clack down, bilateral is vented, the electromagnetic relief valve of the cast steel valve body of major-minor valve monolithic construction is compared, the safety reliability of valve obtains larger lifting, can use more reliably under the main steam system high temperature and high pressure condition of Large Copacity fired power generating unit, overcritical and supporting needs that are ultra supercritical coal-fired unit can be solved.

In the technological scheme of the present embodiment, the cross section basic shape of upper horizontal through flow hole (8), lower horizontal through flow hole (9) and the through-flow groove of longitudinal direction (10) all by rectangle processing, and sentences the round-corner transition of certain radius to reduce localized stress during pressure-bearing in right-angled corner.

In order to optimizing flow passage structure, at upper horizontal through flow hole (8) and longitudinal through-flow groove (10) and lower horizontal through flow hole (9) rotation angle position crossing with longitudinally through-flow groove (10), 90 ° of corners are through being processed to form fillet (11) (see Fig. 9); A projective structure (Figure 10) charged in horizontal flow hole is respectively processed in the upper and lower part of side plate (5), the horizontal width of projective structure is suitable with the width in corresponding horizontal flow hole, to ensure in this projective structure energy load level through flow hole.The upper surface of the projective structure on described top is plane, presses close to the upper plane of upper horizontal through flow hole (8), lower surface be root connect with side plate (5) inner surface arcuate surface (12), this arcuate surface (12) center line be positioned at the inner side of side plate (5) inner surface and the downside of this arcuate surface (12); The lower surface of the projective structure of described bottom is plane, presses close to the lower plane of lower horizontal through flow hole (9), upper surface be root connect with side plate (5) inner surface arcuate surface (12), this arcuate surface (12) center line be positioned at the inner side of side plate (5) inner surface and the upside of this arcuate surface (12).After side plate (5) welds with valve body part (1), at longitudinal through-flow groove (10) and the turning point of upper horizontal through flow hole (8), lower horizontal through flow hole (9), constitute by above-mentioned fillet (11) and arcuate surface (12) the circular arc runner turned to gradually.

In the technological scheme of the present embodiment, in the corner, the left and right sides that inlet channel hole (7) are crossing with lower horizontal through flow hole (9), be also processed with arc rotary surface transition.

Under normal circumstances, the medium runner of forged steel valve body is all formed by the mode of cutting, by the restriction of mechanical processing technique ability, often there are some and such as take a sudden turn in the shape of runner and configuration aspects, flow area to change suddenly etc. and easily causes medium to produce stronger eddy current, be unfavorable for medium smooth outflow and the remarkable structural imperfection increasing flow passage resistance force of waterproof coefficient, especially for gas medium, the vibration that irrational runner design produces when also greatly can increase medium flow at high speed and noise, and therefore impact is brought on system and equipment reliability of operation.The technological scheme of the present embodiment is by the setting of the knuckle of the fillet (11) in valve body part (1), arcuate surface (12) on side plate (5) and inlet channel hole (7) upside, make valve flowing channel more reasonable structure (Fig. 4), flow passage resistance force of waterproof has larger decline, through-current capability reaches substantially suitable with foundry goods valve body, thus ensure that valve can meet the discharge capacity of working condition requirement, and the reliability of vibration when contributing to control discharge and noise, guarantee valve working.

Why the cross section basic shape of upper horizontal through flow hole (8), lower horizontal through flow hole (9) and the through-flow groove of longitudinal direction (10) is set to rectangle, be the processing for the ease of carrying out the fillet (11) in valve body part (1), the projective structure on side plate (5) and arcuate surface (12), and be conducive to making these finished surfaces obtain good transition with processing flow channel is surperficial and is connected.

In the technological scheme of the present embodiment, the side canal of the valve body front and rear sides be made up of longitudinal through-flow groove (10) is positioned at valve body part (1) completely, the comparatively simple inner surface of inner surface structure of side plate (5) by centre plane and upper and lower both sides connect with it, form to bending cylndrical surface to inward side.

In addition, in the technological scheme of the present embodiment, be processed with outside thread in the upper end of valve body part (1), threaded engagement is arranged on the upper middle flange forming valve body of valve body part (1) within the flange (2) processed separately.The surface being positioned at valve body part (1) upside in valve body inside flange upper end is the surface of installing gasket seal.

Middle flange is installed on valve body by the mode that valve body is threaded connection, and solves the structural design in directly arranging on forging existing for flange and a processing difficult problem.The present embodiment is by realizing and the connection of upside part (with combination seal gasket seal) with the structure of Flange joint in valve body upper end, with the product of existing cast steel valve body (see Fig. 2, Fig. 3) compare, the lumen height of valve body has had significant reduction, the lappingout of sealing surface when the processing of body cavity and the welding of valve seat and assembling is made to become more for convenience, thus the workmanship ensureing valve is conducive to, simultaneously, the whole height of valve also has larger reduction, product dismounting when disintegrating and keep in repair is simple, convenient, easily, workload during product repairing reduces, working efficiency is improved,

Embodiment two

The smithwelding valve body technological scheme of the present embodiment, only the concrete enforcement structure of side plate (5) and embodiment one different, the structure at all the other each positions indifference, therefore the present embodiment only does relevant discussion to the concrete structure at side plate (5) position, and all the other places identical with embodiment one are not then done to apply and stated.

As Figure 13 and Figure 14, Figure 15, shown in Figure 16, the inner surface of side plate (5) and embodiment one latus inframedium (5) inner surface be only cylndrical surface that simple midplane adds upper and lower both sides unlike, inner surface is recessed, recessed intermediate portion is also connected with it by the plane of centre and upper and lower both sides, form to bending cylndrical surface to inward side, the concave circular arc edge of middle recessed portion both sides then oriented upper rising to the left and right, that is the inner surface of side plate (5) is formed after adding 90 ° of tangent with it circular arcs of two ends longitudinally path scanning with one section of straight line, in addition, the fillet of the right-angled corner in the cross section of upper horizontal through flow hole (8), lower horizontal through flow hole (9) and the through-flow groove of longitudinal direction (10) is also suitable with the radius of above-mentioned 90 ° of circular arcs, and is greater than the fillet radius of corresponding site in embodiment one.

In the technical solution of the utility model, side plate (5) and valve body part (1) are connected with the weld seam of side plate (5) surrounding and ensure that runner inside it and the external world reliably completely cut off.In embodiment one, the longitudinal weld of side plate (5) left and right sides its reliability when being applied to the extreme temperature and pressure operating mode such as super (super-) critical is short of to some extent, because the inner surface near the root of weld is 90 ° of right angles (see Fig. 6,7), stress concentration phenomenon can be formed at this place during pressurized, easily cause weld seam to go wrong.And after the inner surface of side plate (5) adopts the technological scheme of the present embodiment, the inner surface of the root of weld is no longer the right-angled corner (see Figure 13) of 90 °, and force-bearing situation has larger improvement.Embodiment one is compared with the lateral plate structure of embodiment two, the inner surface processing of the side plate of embodiment one is comparatively simple, the processing of the inner surface of the side plate of embodiment two is then relatively more complex, but the force-bearing situation of welding line structure is better, is thus more suitable for using in super (super-) critical operating mode.

The content that this specification is not described in detail belongs to the known prior art of professional and technical personnel in the field.

Below done to illustrate to the technical solution of the utility model in conjunction with the accompanying drawings and embodiments, but these accompanying drawings and explanation can not be understood to limit scope of the present utility model.Those skilled in the art should know; the utility model is not subject to the restriction of above-described embodiment and accompanying drawing; its protection domain defined by appending claims; any in the technological scheme not exceeding the various changes in the scope that the utility model claims define, modification is formed; all do not depart from spirit of the present utility model and technical spirit, still can belong within right of the present utility model.

Claims (5)

1. the smithwelding valve body structure of a side steam discharge electromagnetic relief valve, described valve body is that the left and right sides is all with the bilateral steam exhaust structure of media outlet end, valve flowing channel is upwards enter valve body lumen through the side canal of both sides, front and back from the medium inlet end of downside, during discharge from the valve seat intermediate throughholes be positioned on the downside of valve body lumen shunt again downwards to the left and right both sides to media outlet end, it is characterized in that: described valve body is by valve body part (1) and be positioned at its left side, the steam discharge flange (4) of right both sides and before being positioned at it, the side plate (5) of rear both sides is welded after roughing, postwelding part surface forms the smithwelding valve body of complete side steam discharge electromagnetic relief valve again after fine finishing, the profile of the intermediate portion of valve body part (1) is square structure, be processed with the exhaust vent hole of through circle in left-right direction, before valve body part (1), rear side, upper horizontal through flow hole (8) is processed with respectively on top, lower horizontal through flow hole (9) is processed with in bottom, lower horizontal through flow hole (9) makes the front and back sides of inlet channel hole (7) and the valve body part (1) of up processing from valve body lower end through, upper horizontal through flow hole (8) then makes the lumen of valve body (6) through with the front and back sides of valve body part (1), longitudinally through-flow groove (10) is processed with between the lower horizontal through flow hole (9) and the aperture of upper horizontal through flow hole (8) of valve body part (1) front and back sides, side plate (5) is welded in the front and back sides of valve body part (1), to upper horizontal through flow hole (8) and lower horizontal through flow hole (9) aperture, two ends and longitudinally through-flow groove (10) close, four limits that side plate (5) presses close to valve body part (1) side at it are processed with bevel for welding, after side plate (5) welds with valve body part (1), longitudinal through-flow groove (10) becomes closed runner makes inlet channel hole (7) be connected with the lumen (6) of valve body by lower horizontal through flow hole (9) and upper horizontal through flow hole (8).

2. the smithwelding valve body structure of side according to claim 1 steam discharge electromagnetic relief valve, is characterized in that: the cross section basic shape of upper horizontal through flow hole (8), lower horizontal through flow hole (9) and the through-flow groove of longitudinal direction (10) is rectangle.

3. the smithwelding valve body structure of side according to claim 2 steam discharge electromagnetic relief valve, it is characterized in that: at upper horizontal through flow hole (8) and longitudinal through-flow groove (10) and lower horizontal through flow hole (9) rotation angle position crossing with longitudinally through-flow groove (10), 90 ° of corners are through being processed to form fillet (11), upper at side plate (5), bottom is respectively processed with a projective structure charged in horizontal flow hole, the horizontal width of projective structure is suitable with the width in corresponding horizontal flow hole, the upper surface of top projective structure is plane, press close to the upper plane of upper horizontal through flow hole (8), lower surface is the arcuate surface (12) that root connects with side plate (5) inner surface, the center line of this arcuate surface (12) is positioned at the inner side of side plate (5) inner surface and the downside of this arcuate surface (12), the lower surface of bottom projective structure is plane, press close to the lower plane of lower horizontal through flow hole (9), upper surface is the arcuate surface (12) that root connects with side plate (5) inner surface, the center line of this arcuate surface (12) is positioned at the inner side of side plate (5) inner surface and the upside of this arcuate surface (12), after side plate (5) welds with valve body part (1), at longitudinal through-flow groove (10) and the turning point of upper horizontal through flow hole (8), lower horizontal through flow hole (9), constitute by above-mentioned fillet (11) and arcuate surface (12) the circular arc runner turned to gradually.

4. the smithwelding valve body structure of side according to claim 1 steam discharge electromagnetic relief valve, is characterized in that: the left and right sides corner crossing with lower horizontal through flow hole (9) in inlet channel hole (7) is processed with arc rotary surface transition.

5. the smithwelding valve body structure of side according to claim 1 steam discharge electromagnetic relief valve, it is characterized in that: be processed with outside thread in the upper end of valve body part (1), within the flange (2) processed separately, threaded engagement is arranged on the upper middle flange forming valve body of valve body part (1).