CN204164444U - Pressurized-water reactor nuclear power plant nuclear island reduction valve - Google Patents
Pressurized-water reactor nuclear power plant nuclear island reduction valve Download PDFInfo
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- CN204164444U CN204164444U CN201420471191.5U CN201420471191U CN204164444U CN 204164444 U CN204164444 U CN 204164444U CN 201420471191 U CN201420471191 U CN 201420471191U CN 204164444 U CN204164444 U CN 204164444U
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Abstract
The utility model relates to million kilowatt nuclear power station key technology area, provide a kind of pressurized-water reactor nuclear power plant nuclear island reduction valve, for pressurized-water reactor nuclear power plant nuclear island system, comprise and there is cavity and the valve body that can hold medium, valve body offers medium inlet and media outlet, mangetic core assembly is provided with in cavity, mangetic core assembly comprises spool, valve pocket and Packing spring, reduction valve also comprises releasing pressure automatically structure, releasing pressure automatically structure comprises the top cover of hollow, sealing plate and pressure release spring, top cover is connected to the upper end of valve body, between sealing plate and valve body, there is pressure release passage, overflow hole is offered on sealing plate, overflow hole place is provided with Sealing, valve body is provided with the conduit being communicated with pressure release passage and media outlet.The pressurized-water reactor nuclear power plant nuclear island reduction valve that the utility model provides, it can oppositely automatic reversal, simultaneously can manual tune pressure to pressure release, prevents self-locking, effectively solve the problem built the pressure, the Security that the equipment that ensure that runs and working life.
Description
Technical field
The utility model relates to million kilowatt nuclear power station key technology area, particularly relates to a kind of pressurized-water reactor nuclear power plant nuclear island reduction valve.
Background technique
In the nuclear island system architecture of pressurized-water reactor nuclear power plant, need to use the runnability of Pneumatic gate valve to nuclear island system and control.In current industry, reverse pressure-reducing function is not with by the air inlet adjustment reduction valve in Pneumatic gate valve, when valve event process causes pressure superpressure in cylinder, cannot carry out timely pressure release, affect equipment service life; In addition, when there being pressure in the downstream pipe that reduction valve connects, if need reduction valve pressure to reduce further, then due to the pressure self-locking function of reduction valve, being difficult to realize, thus cannot realizing operating controlling functions accordingly.Meanwhile, the valve body radiation-resistant property of conventional vacuum valve is poor, cannot use under pressurized-water reactor nuclear power plant nuclear island radioactive environment.
Model utility content
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, provides a kind of pressurized-water reactor nuclear power plant nuclear island reduction valve, and it oppositely to pressure release, can effectively solve the problem built the pressure, the Security that the equipment that ensure that runs and working life by automatic reversal.
The utility model is achieved in that a kind of pressurized-water reactor nuclear power plant nuclear island reduction valve, for pressurized-water reactor nuclear power plant nuclear island system, comprise and there is cavity and the valve body that can hold medium, described valve body offers the medium inlet and media outlet that communicate with described cavity, the mangetic core assembly for controlling described medium inlet and described media outlet break-make is provided with in described cavity, described mangetic core assembly comprises spool, be movably set in the valve pocket on described spool and the Packing spring for driving described valve pocket to remain at sealing state, described Packing spring is supported between described valve pocket and described valve body, described reduction valve also comprises releasing pressure automatically structure, described releasing pressure automatically structure comprises the top cover of hollow, be arranged on the sealing plate in described top cover and pressure release spring, described top cover is connected to the upper end of described valve body, and offer the through hole communicated with inside, between described pressure release spring is resisted against described top cover and described sealing plate, between described sealing plate and described valve body, there is pressure release passage, overflow hole is offered on described sealing plate, described overflow hole place is provided with Sealing, described valve body is provided with the conduit being communicated with described pressure release passage and described media outlet.
Particularly, described spool has the external part stretched out outside described valve body, and described external part activity is inserted in described overflow hole, and described external part offers groove, and described Sealing is arranged in described groove.
Particularly, the diameter of described external part is less than the diameter of described spool mobile jib, and the diameter of described overflow hole is greater than the diameter of described external part.
Further, described top cover is also provided with regulation component, described regulation component comprises pressure regulation bar, be arranged on pressing plate in described top cover and pressure adjusting spring, the external diameter of described pressure adjusting spring is less than the external diameter of described pressure release spring, between described pressure adjusting spring and described pressure release spring are all arranged on described pressing plate and described sealing plate, described pressure regulation bar is threadedly connected to described top cover, and one end is supported on described pressing plate.
Particularly, described sealing plate comprises the first cover plate and the second cover plate that are superimposed with each other, seal membrane is provided with between described first cover plate and described second cover plate, a part for described seal membrane is folded between described first cover plate and described second cover plate, and another part is folded between described top cover and described valve body.
Particularly, the rubber cushion for sealing is provided with between described top cover and described valve body.
Particularly, described first cover plate bending is formed with the groove for holding described pressure release spring and described pressure adjusting spring, and one end of described pressure release spring and described pressure adjusting spring is arranged in described groove.
Particularly, described seal membrane bending is formed with deformations.
Particularly, one end that described conduit is positioned at described media outlet is provided with inclined-plane.
Preferably, described Sealing is the O-ring seals be made up of EPDM material, and described valve body is 316
#stainless steel body.
A kind of pressurized-water reactor nuclear power plant nuclear island reduction valve that the utility model provides, by being provided with releasing pressure automatically structure, when pressure is normal, sealing plate supported by pressure release spring, and overflow hole is sealed by Sealing, keeps normal operating pressure.And when the overpressure at media outlet place, by conduit, pressure being passed in pressure release passage, pressure acts on sealing plate, compression pressure release spring, and upwards lifting sealing plate, makes Sealing no longer seal overflow hole, realizes the function of oppositely pressure release in time.Meanwhile, the adjusting part of setting, manually regulates pressure adjusting spring, can regulate the pressure of reduction valve off-load, prevents reduction valve self-locking.Such setting, efficiently solving reduction valve cannot the reverse problem that builds the pressure of pressure release and downstream pipe, and overcomes the defect of reduction valve self-locking, ensure that Security and the working life of equipment use.In addition, the valve body material of this reduction valve selects 316
#stainless steel, Sealing selects EPDM material to make, and bi-material all has good radiation-resistant property, can use under pressurized-water reactor nuclear power plant nuclear island radioactive environment.
Accompanying drawing explanation
Fig. 1 is the generalized section under pressurized-water reactor nuclear power plant nuclear island reduction valve that the utility model embodiment provides is in pressure release state;
Fig. 2 is the close-up schematic view at A place in Fig. 1.
Embodiment
In order to make the purpose of this utility model, technological scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As depicted in figs. 1 and 2, a kind of pressurized-water reactor nuclear power plant nuclear island reduction valve 1 that the utility model embodiment provides, for pressurized-water reactor nuclear power plant nuclear island system, this reduction valve 1 reduces pressure at the medium of conventional vacuum valve, on resistance to irradiation function basis, have employed the Combination Design of Sealing and overflow hole, self-relieving function when achieving reduction valve 1 downstream superpressure.This reduction valve 1 comprises and has cavity 111 and the valve body 11 that can hold medium, valve body 11 offers the medium inlet 112 and media outlet 113 that communicate with cavity 111, (medium can be water, gas or oil, is gas in this enforcement).Be provided with for the mangetic core assembly 12 of control media entrance 112 with media outlet 113 break-make in cavity 111, mangetic core assembly 12 comprising spool 121, being movably set in the valve pocket 122 on spool 121 and the Packing spring (not shown) for driving valve pocket 122 to remain at sealing state, and Packing spring is supported between valve pocket 122 and valve body 11.During normal condition, under the active force of Packing spring, valve pocket 122 remains at sealing state medium inlet 112 and media outlet 113 blocked, and when its pressure of the medium entered from medium inlet 112 is greater than the spring force of Packing spring, just Packing spring is compressed, thus be communicated with medium inlet 112 and media outlet 113, realize pressure-reducing function.When its pressure of the medium entered is less than the spring force of Packing spring, Packing spring resets, and again medium inlet 112 and media outlet 113 is blocked sealing, and so forth, realizes the using function of reduction valve 1.
Particularly, as depicted in figs. 1 and 2, due in the middle of real work situation, when causing the pressure superpressure at media outlet 113 place in the process of valve pocket 122 action, if can not pressure release in time, just interference can be caused to the operation of equipment, affect the working life of equipment, and the passage between medium inlet 112 and media outlet 113 is irreversible, medium can only flow to media outlet 113 from medium inlet 112, therefore, the reduction valve 1 provided in the present embodiment also comprises releasing pressure automatically structure 13, for carrying out timely pressure release when the pressure generation superpressure at media outlet 113 place.Releasing pressure automatically structure 13 comprise hollow top cover 131, be arranged on sealing plate 132 in top cover 131 and pressure release spring 133, top cover 131 is connected to the upper end of valve body 11, and offer the through hole 1311 communicated with inside, pressure release spring 133 is resisted against between top cover 131 and sealing plate 132, there is between sealing plate 132 and valve body 11 pressure release passage 134, sealing plate 132 offers overflow hole 135, overflow hole 135 place is provided with Sealing 136, valve body 11 is provided with the conduit 137 being communicated with pressure release passage 134 and media outlet 113.By such setting, through hole 1311 is communicated with inside and the ambient atmosphere of top cover 131, to run out of for the medium of compression when pressure release, and sealing plate 132 is supported according to the force value arranged by pressure release spring 133, sealing plate 132 is made to be in sealing state all the time, namely Sealing 136 is in all the time by the state that overflow hole 135 seals, thus when pressure is normal, does not have medium and run out of from overflow hole 135.Can be provided with the cylinder coordinated with overflow hole 135 on the top of valve body 11 in addition, Sealing 136 is arranged on function cylinder realizing sealed by overflow hole 135.And when the overpressure at media outlet 113 place, the pressure at media outlet 113 place can be passed in pressure release passage 134 by the conduit 137 arranged, thus make the pressure existed in medium act on sealing plate 132, and then compression pressure release spring 133, sealing plate 132 is upwards lifted, Sealing 136 is made no longer to seal overflow hole 135, medium is run out of from overflow hole 135, and be expelled in air via the through hole 1311 on top cover 131, realize the function of oppositely pressure release in time, prevent downstream from occurring building the pressure, ensure that the Security of equipment use.
The pressurized-water reactor nuclear power plant nuclear island reduction valve 1 that the utility model provides, by being provided with releasing pressure automatically structure 13, thus achieve when superpressure appears in the pressure at media outlet 113 place, can oppositely pressure release in time, pressure is discharged in time, avoid downstream to occur building the pressure and by device damage, making to reduce situation the working life of equipment occurs, ensure that the Security of equipment use.
Particularly, as depicted in figs. 1 and 2, in this enforcement, spool 121 has the external part 1211 stretched out outside valve body 11, and external part 1211 activity is inserted in overflow hole 135, external part 1211 offers groove (not indicating in figure), the degree of depth of groove is set to 2mm according to design standard, certainly, also can be arranged to the different degree of depth according to concrete service condition, Sealing 136 is arranged in groove.By such setting, spool 121 can not only lead the motion of valve pocket 122, can also slide up and down the effect providing guiding, guarantee the accuracy that sealing plate 132 moves for sealing plate 132.And overflow hole 135 not only plays the effect for pressure relief channels, also installing for coordinating with the external part 1211 of spool 121, guaranteeing tightness when sealing.The external part 1211 of spool 121 offers groove, and Sealing 136 is arranged in groove, serve the effect of restriction Sealing 136 position, the position change of the Sealing 136 when sliding can be prevented and occur that the problem of seal failure occurs, ensure that the reliability that Sealing 136 seals.When needs pressure release, external part 1211 skids off from overflow hole 135, Sealing 136 seal failure, and medium is run out of from the gap existed between Sealing 136 and sealed cover, the medium of trace release downstream compressor, thus serves the function of pressure release.
Particularly, in the present embodiment, the diameter of external part 1211 is less than the diameter of spool 121 mobile jib, and the diameter of overflow hole 135 is greater than the diameter of external part 1211.By such setting, not only meet the demand that external part 1211 can be inserted into assembling in overflow hole 135, also reduce the area of contact of assembling between external part 1211 and overflow hole 135, reduce the difficulty of sealing, improve reliability during sealing.
Further, as depicted in figs. 1 and 2, in actual use, sometimes the pressure of reduction valve 1 is needed to reduce, for meeting this kind of demand, the reduction valve 1 that the present embodiment provides also is provided with regulation component 14 at its top cover 131, regulation component 14 comprises pressure regulation bar 141, be arranged on the pressing plate 142 in top cover 131 and pressure adjusting spring 143, the external diameter of pressure adjusting spring 143 is less than the external diameter of pressure release spring 133, pressure adjusting spring 143 and pressure release spring 133 are all arranged between pressing plate 142 and sealing plate 132, pressure regulation bar 141 is threadedly connected to top cover 131, and one end is supported on pressing plate 142.When normally using, the pressure of the off-load of reduction valve 1 is that the spring force common according to both pressure adjusting spring 143 and pressure release spring 133 sets, therefore, by being provided with the pressing plate 142 supported on pressure adjusting spring 143 one end identical with pressure release spring 133, and pass through the effect of pressure regulation bar 141, and pressure regulation bar 141 is threadedly connected to top cover 131.Like this, manually rotate and regulate pressure regulation bar 141, just can realize the function regulating reduction valve 1 pressure unloading, avoid reduction valve 1 self-locking and build the pressure, cause the situation of device damage to occur.Concrete regulating method is; When media pressure downstream is deposited in case, when needing the pressure turning down downstream further, first pressure regulation bar 141 is regulated, pressure adjusting spring 143 and pressure release spring 133 are loosened in right amount, thus the medium of downstream compressor is discharged by the gap between overflow hole 135 and Sealing 136, after completing pressure release, then tighten pressure regulation bar 141 to the decompression numerical value reaching setting, easy to adjust, quick.
Particularly, as depicted in figs. 1 and 2, sealing plate 132 comprises the first cover plate 1321 and the second cover plate 1322 be superimposed with each other, seal membrane 15 is provided with between first cover plate 1321 and the second cover plate 1322, a part for seal membrane 15 is folded between the first cover plate 1321 and the second cover plate 1322, and another part is folded between top cover 131 and valve body 11.Because sealing plate 132 is movable, gap is there is between the inwall of therefore sealing plate 132 and top cover 131, be communicated in the inner chamber of pressure release passage 134 and top cover 131, run out of from the gap between sealing plate 132 and the inwall of top cover 131 to prevent medium, just sealing plate 132 is arranged to the first superimposed mutually cover plate 1321 and the second cover plate 1322, then between the first cover plate 1321 and the second cover plate 1322, seal membrane 15 is folded with, and another part of seal membrane 15 is folded between top cover 131 and valve body 11, like this, seal membrane 15 cuts off the passage that pressure release passage 134 is communicated with via the gap between sealing plate 132 and the inwall of top cover 131 with the inner chamber of top cover 131, prevent the medium compressed from running out of from gap, and then guarantee the reliability of whole reduction valve 1 using function.
Particularly, as depicted in figs. 1 and 2, in order to ensure the sealing after being connected between top cover 131 with valve body 11, the rubber cushion 16 for sealing is provided with between top cover 131 and valve body 11, by the seal action of seal rubber pad 16, by the clearance seal between top cover 131 and valve body 11, ensure that the sealing of pressure release passage 134.
Particularly, as depicted in figs. 1 and 2, the first cover plate 1321 bending is formed with the groove 1323 for holding pressure release spring 133 and pressure adjusting spring 143, and one end of pressure release spring 133 and pressure adjusting spring 143 is arranged in groove 1323.Due to reduction valve 1 operationally, the pressure release spring 133 of its inside and pressure adjusting spring 143 constantly stressedly can be compressed or be resetted, in order to prevent mounting point change, just the first cover plate 1321 bending is formed with groove 1323, spacing by groove 1323, guarantee the stability of pressure release spring 133 and pressure adjusting spring 143 mounting point, and then guarantee the reliability of reduction valve 1 using function.
Particularly, as depicted in figs. 1 and 2, because the first cover plate 1321 and the second cover plate 1322 can reciprocatingly slide in the inner chamber of top cover 131, and then the length of seal membrane 15 can be caused to change, there is enough length seal in order to ensure seal membrane 15, bending on seal membrane 15 is formed with deformations 151, deformation quantity when compensating slip by the deformation effect of deformations 151, ensures the reliability that seal membrane 15 seals.
Particularly, as depicted in figs. 1 and 2, one end that conduit 137 is positioned at media outlet 113 is provided with inclined-plane 1371.By being provided with inclined-plane 1371, increasing the area of conduit 137 opening end, enabling medium flow to pressure release passage 134 fast and carrying out pressure release.And the inclined-plane 1371 of setting can also play the effect of guiding for the flowing of medium.
Preferably, Sealing 136 is that valve body is 316 by EPDM (the Chinese meaning is: the ethylene propylene diene rubber) O-ring seals that material is made
#stainless steel body.O-ring seals is standard piece, and specification is 4.5mmX1.8mm, is arranged in groove, can effectively realize sealing, long service life with groove, and in use, when after O-ring seals wear out failure, can also change, maintenance cost is low.In addition, O-ring seals is made up of EPDM material, and valve body is by 316
#stainless steel material is made, EPDM material and 316
#all there is good radiation-resistant property, the reduction valve made is used under pressurized-water reactor nuclear power plant nuclear island radioactive environment.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace or improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. a pressurized-water reactor nuclear power plant nuclear island reduction valve, for pressurized-water reactor nuclear power plant nuclear island system, comprise and there is cavity and the valve body that can hold medium, described valve body offers the medium inlet and media outlet that communicate with described cavity, the mangetic core assembly for controlling described medium inlet and described media outlet break-make is provided with in described cavity, described mangetic core assembly comprises spool, be movably set in the valve pocket on described spool and the Packing spring for driving described valve pocket to remain at sealing state, described Packing spring is supported between described valve pocket and described valve body, it is characterized in that, described reduction valve also comprises releasing pressure automatically structure, described releasing pressure automatically structure comprises the top cover of hollow, be arranged on the sealing plate in described top cover and pressure release spring, described top cover is connected to the upper end of described valve body, and offer the through hole communicated with inside, between described pressure release spring is resisted against described top cover and described sealing plate, between described sealing plate and described valve body, there is pressure release passage, overflow hole is offered on described sealing plate, described overflow hole place is provided with Sealing, described valve body is provided with the conduit being communicated with described pressure release passage and described media outlet.
2. pressurized-water reactor nuclear power plant nuclear island reduction valve as claimed in claim 1, it is characterized in that, described spool has the external part stretched out outside described valve body, and described external part activity is inserted in described overflow hole, described external part offers groove, and described Sealing is arranged in described groove.
3. pressurized-water reactor nuclear power plant nuclear island reduction valve as claimed in claim 2, it is characterized in that, the diameter of described external part is less than the diameter of described spool mobile jib, and the diameter of described overflow hole is greater than the diameter of described external part.
4. pressurized-water reactor nuclear power plant nuclear island reduction valve as claimed in claim 1 or 2, it is characterized in that, described top cover is also provided with regulation component, described regulation component comprises pressure regulation bar, be arranged on pressing plate in described top cover and pressure adjusting spring, the external diameter of described pressure adjusting spring is less than the external diameter of described pressure release spring, between described pressure adjusting spring and described pressure release spring are all arranged on described pressing plate and described sealing plate, described pressure regulation bar is threadedly connected to described top cover, and one end is supported on described pressing plate.
5. pressurized-water reactor nuclear power plant nuclear island reduction valve as claimed in claim 4, it is characterized in that, described sealing plate comprises the first cover plate and the second cover plate that are superimposed with each other, seal membrane is provided with between described first cover plate and described second cover plate, a part for described seal membrane is folded between described first cover plate and described second cover plate, and another part is folded between described top cover and described valve body.
6. pressurized-water reactor nuclear power plant nuclear island reduction valve as claimed in claim 5, is characterized in that, being provided with the rubber cushion for sealing between described top cover and described valve body.
7. pressurized-water reactor nuclear power plant nuclear island reduction valve as claimed in claim 5, it is characterized in that, described first cover plate bending is formed with the groove for holding described pressure release spring and described pressure adjusting spring, and one end of described pressure release spring and described pressure adjusting spring is arranged in described groove.
8. pressurized-water reactor nuclear power plant nuclear island reduction valve as claimed in claim 5, it is characterized in that, described seal membrane bending is formed with deformations.
9. pressurized-water reactor nuclear power plant nuclear island reduction valve as claimed in claim 1, it is characterized in that, one end that described conduit is positioned at described media outlet is provided with inclined-plane.
10. pressurized-water reactor nuclear power plant nuclear island reduction valve as claimed in claim 1, it is characterized in that, described Sealing is the O-ring seals be made up of EPDM material, and described valve body is 316
#stainless steel body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420471191.5U CN204164444U (en) | 2014-08-19 | 2014-08-19 | Pressurized-water reactor nuclear power plant nuclear island reduction valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420471191.5U CN204164444U (en) | 2014-08-19 | 2014-08-19 | Pressurized-water reactor nuclear power plant nuclear island reduction valve |
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| Publication Number | Publication Date |
|---|---|
| CN204164444U true CN204164444U (en) | 2015-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420471191.5U Expired - Fee Related CN204164444U (en) | 2014-08-19 | 2014-08-19 | Pressurized-water reactor nuclear power plant nuclear island reduction valve |
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| CN (1) | CN204164444U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422933A (en) * | 2015-12-21 | 2016-03-23 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Safety valve with dual working modes |
| CN108825835A (en) * | 2018-07-24 | 2018-11-16 | 银川市长城液压有限责任公司 | A kind of direct acting stacked compression release valve |
| CN110425190A (en) * | 2019-08-08 | 2019-11-08 | 广州龙渊液压机械有限公司 | A kind of big-flow high-pressure overflow valve |
| CN112361049A (en) * | 2020-10-15 | 2021-02-12 | 中车山东机车车辆有限公司 | Pressure regulating valve of railway wagon |
| CN113090791A (en) * | 2021-03-03 | 2021-07-09 | 江苏八方工业装备有限公司 | Novel safety valve capable of preventing premature ejaculation |
-
2014
- 2014-08-19 CN CN201420471191.5U patent/CN204164444U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422933A (en) * | 2015-12-21 | 2016-03-23 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Safety valve with dual working modes |
| CN108825835A (en) * | 2018-07-24 | 2018-11-16 | 银川市长城液压有限责任公司 | A kind of direct acting stacked compression release valve |
| CN108825835B (en) * | 2018-07-24 | 2024-04-19 | 银川市长城液压有限责任公司 | Direct-acting superposition type pressure reducing valve |
| CN110425190A (en) * | 2019-08-08 | 2019-11-08 | 广州龙渊液压机械有限公司 | A kind of big-flow high-pressure overflow valve |
| CN112361049A (en) * | 2020-10-15 | 2021-02-12 | 中车山东机车车辆有限公司 | Pressure regulating valve of railway wagon |
| CN113090791A (en) * | 2021-03-03 | 2021-07-09 | 江苏八方工业装备有限公司 | Novel safety valve capable of preventing premature ejaculation |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150218 |