CN203770774U - Steam pressure reducing and temperature lowering valve - Google Patents

Steam pressure reducing and temperature lowering valve Download PDF

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Publication number
CN203770774U
CN203770774U CN201320852063.0U CN201320852063U CN203770774U CN 203770774 U CN203770774 U CN 203770774U CN 201320852063 U CN201320852063 U CN 201320852063U CN 203770774 U CN203770774 U CN 203770774U
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CN
China
Prior art keywords
valve
described
inner sleeve
outer sleeve
nozzle
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CN201320852063.0U
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Chinese (zh)
Inventor
罗林华
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罗林华
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Priority to CN201320852063.0U priority Critical patent/CN203770774U/en
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Publication of CN203770774U publication Critical patent/CN203770774U/en

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Abstract

The utility model relates to a steam pressure reducing and temperature lowering valve. At present, a steam pressure reducing and temperature lowering valve is complex in structure, low in vaporization speed, long and large in size. The steam pressure reducing and temperature lowering valve is characterized by comprising an inner sleeve and an outer sleeve, wherein a plurality of second small holes are formed in the inner sleeve, a plurality of first small holes are formed in the outer sleeve, the outer sleeve is fixed to a valve body, the first small holes of the outer sleeve are communicated with a steam inlet, and the inner sleeve is fixed to a valve element through fasteners; a sliding base is arranged at the lower end of the valve element and located in the cavity of the inner sleeve, a connecting cavity with a downward opening is formed in the middle of the sliding base, a nozzle matched with the connecting cavity of the sliding base is arranged at the lower end of the valve body, the nozzle is hollow and cylindrical, a plurality of third small holes are formed in the nozzle, the upper portion of the nozzle is connected with the connecting cavity of the sliding base in a sliding mode, and the number of the third small holes, shielded by the inner wall of the connecting cavity of the sliding base, of the nozzle changes along with sliding of the nozzle; the cavity of the inner sleeve is communicated with the second small holes and a steam outlet. According to the technical scheme, the time needed for vaporization of water with the temperature lowered is shortened, and the structural length of a traditional desuperheater is reduced.

Description

A kind of steam pressure-reducing desuperheat valve

Technical field

The utility model relates to a kind of steam pressure-reducing desuperheat valve.

Background technique

Existing traditional steam converter valve, mainly represent that model is WYS9(6) 45 series, composition structure WY9(6) there are two valve seats on 45 type pressure and temperature reducing valve arrangements, as shown in Figure 1, flap is hollow and is with nozzle arrangements, its Desuperheating device, in steam converter valve, completes the desuperheat of reducing-and-cooling plant and pressure-reducing function in one, and apparatus structure length shortens dramatically.Be characterized in: no matter whether vapor pressure has fluctuation, total energy keeps downstream pressure substantially constant; Enter fully atomization and the vaporization in valve of pressure and temperature reducing valve nozzle by electric control valve or variable frequency pump control cooling water flow, realize the control of reducing-and-cooling plant outlet end vapor (steam) temperature.Fix because of injection diameter and the quantity of pressure and temperature reducing valve nozzle, spray into the desuperheat vaporization effect quality of water column in steam converter valve, depend on the desired level of steam flow rate and steam converter valve jet expansion cooling water flow velocity.When steam flow moves under rated load (flow) state, in steam converter valve, steam flow rate, jet expansion cooling water flow velocity are in the time of desirable flow velocity, and desuperheater vaporization effect is good.

Existing problems and shortcoming:

1. traditional steam converter valve, owing to adopting the two-seat structure of one-level decompression, is imported and exported reduction valve than little.Poor when larger when steam inlet and outlet pressure, need to increase restricting orifice decompression.

2. pressure and temperature reducing valve opening increases or reduces along with steam flow changes, to ensure steam pressure constant after steam converter valve, in the time that load (flow) reduces, because of injection diameter and the quantity of pressure and temperature reducing valve nozzle fixing non-adjustable, desuperheat vaporization effect variation; In the time that load (flow) is reduced to below 1/3, because the pressure and temperature of steam can not synchronization regulation, desuperheat vaporization effect sharply declines, a large amount of cooling waters can not be vaporized, cause the hydrophobic amount of pipe-line system to increase, the water hammer that generation degree is different, can destroy steam converter valve valve body structure in serious situation.

3. cooling water vaporization needed time is long, and the corresponding equipment desired structure length that makes is longer.

Model utility content

The technical assignment of the technical problems to be solved in the utility model and proposition is that prior art scheme is improved and improved, and a kind of steam pressure-reducing desuperheat valve is provided, and to reach simple in structure, improves vaporization rate, reduces device length object.For this reason, the utility model is taked following technological scheme.

A kind of steam pressure-reducing desuperheat valve, comprise valve body, be located at the spool in valve body, the actuating device moving up and down with movable valve plug, the described valve body left and right sides is respectively equipped with steam inlet and steam (vapor) outlet, it is characterized in that: also comprise inner sleeve, be coated at the outer sleeve of inner sleeve, described inner sleeve, on outer sleeve, be respectively equipped with multiple second orifices, the first aperture, described outer sleeve is fixed on valve body, cut off steam inlet and enter the passage in valve, the first aperture of outer sleeve communicates with steam inlet, described inner sleeve is fixed on spool by fastening piece, moving up and down of spool drives inner sleeve to move thereupon, the also respective change of quantity that second orifice on inner sleeve is relative with the first aperture on outer sleeve, the lower end of described spool is provided with slide, described slide is positioned at inner sleeve chamber, the connection chamber that Open Side Down is offered at the middle part of described slide, valve body lower end is provided with the nozzle matching with slide connection chamber, described nozzle is hollow cylindrical, which is provided with multiple the 3rd apertures, the connection chamber of nozzle top and slide is slidably connected, and the quantity that slide connection chamber inwall blocks nozzle the 3rd aperture changes thereupon, described inner sleeve chamber communicates with second orifice, steam (vapor) outlet.In the technical program, can be according to the load needs of desuperheat, pass through adjustment actuating mechanism, band movable valve plug moves up and down, make the hole for water spraying of desuperheat nozzle several synchronously definite according to the aperture of steam reducing valve and the water yield of cooling water, the flow velocity substantially constant of guaranteeing the cooling water of desuperheat jet expansion ejection is desirable flow velocity, can not cause excessive water spray.Steam is from the first aperture, second orifice ejection, and cooling water is vaporific in the time that the 3rd aperture sprays, and shortens cooling water and vaporizes the required time, reduces traditional desuperheater structure length.Steam converter valve is imported and exported reduction valve than adopting two-layer configuration, the decompression valve that decompression part coordinates by sleeve and spool carries out pressure adjusting, spool design becomes two-stage aperture, the decompression valve unbalanced force of this structure is little, good stability, be difficult for vibration, and allowing Pressure reducing ratio is traditional the more than a times of two-seater reduction valve, and there is a low noise effect of falling, simultaneously, when cooling water sprays from nozzle, water contacts with the aperture of spool, can not be sprayed directly on on valve body, effectively raise the working life of pressure and temperature reducing valve body, in the time of small flow, also there is good regulating effect.

As the further of technique scheme improved and supplemented, the utility model also comprises following additional technical feature.

The inner chamber of outer sleeve comprises the first chamber section that is positioned at epimere, is positioned at the second chamber section of hypomere, and the internal diameter of the first described chamber section is greater than the internal diameter of the second chamber section; The periphery of inner sleeve is stepped, comprise be positioned at epimere the first shaft part, be positioned at the second shaft part of hypomere, the external diameter of the first described shaft part is greater than the second shaft part external diameter, the first chamber section of outer sleeve and the first shaft part of inner sleeve match, the second chamber section of outer sleeve and the second shaft part of inner sleeve match, the first described aperture is located at the first chamber Duan Chu of outer sleeve, and described second orifice is located at the second shaft part place of inner sleeve; The first described shaft part is offered seal groove, and seal groove is embedded with seal ring.

The bottom of described valve body is provided with lower flange, lower flange is connected with valve body by fastening piece, and the middle part of lower flange is provided with the cooling water import of up/down perforation, and cooling water import is provided with nozzle upwards, the inner chamber of nozzle communicates with cooling water import, between lower flange and valve body, is provided with seal ring.

The top of valve body connects valve gap, and the top of valve gap connects actuator, and described valve gap periphery is provided with the radiating fin of multi-disc parallel arrangement, and the through hole for wearing spool is established at the middle part of valve gap; Described actuator comprises actuating motor, and with the Worm and worm-wheel gearing that actuating motor output shaft is connected, the output terminal of Worm and worm-wheel gearing connects spool and moves up and down with band movable valve plug.

Described actuator also comprises that the handwheel being connected with driving mechanism moves up and down with manual band movable valve plug.

The pipeline section of steam inlet and steam (vapor) outlet is smoothly connected and forms by circular arc, and the circular arc tangential line slope of pipeline reduces to zero again by zero increase gradually, and steam inlet end is equal with steam (vapor) outlet Duan center.Be conducive to reduce the impact of steam to valve, steam inlet end be conducive to stringing equal with steam (vapor) outlet Duan center.

Inner sleeve lower end surface is lower than slide connection chamber, and the cylindrical section of establishing the 3rd aperture on nozzle is arranged in inner sleeve chamber.The cylindrical section of the 3rd aperture is arranged in inner sleeve chamber, and steam enters in inner sleeve chamber through second orifice, and cooling water enters inner sleeve chamber from the 3rd aperture, both mix in inner sleeve chamber, mix fast, simple in structure, and the effect to valve body is little, be conducive to extend the life-span of valve.

Arrange arrange on the height, nozzle of the first aperture height of the 3rd aperture of described outer sleeve is all less than the arrange height of second orifice of inner sleeve, establishes the first aperture is established in the position of the 3rd aperture position lower than outer sleeve on nozzle.Be convenient to realize the control of steam flow and spray water flux.

The top outward of described outer sleeve forms the first joint, the first described connection part between valve body and valve gap, between the first joint and valve gap and and valve body between be equipped with seal ring; Outer sleeve lower end is provided with the second joint of indent, the inner of steam inlet is provided with the boss matching with the second joint, between boss and the second joint, be provided with seal ring, outer sleeve periphery and steam inlet the inner offset, and valve body is connected that by fastening piece outer sleeve is gripped with valve gap.

Beneficial effect:

The injection flow rate of cooling water synchronize with steam pressure-reducing increase or reduce regulate, ensured that not having excessive cooling water is sprayed in steam converter valve;

2. design two-stage sleeve pressure reduction structure in steam converter valve, makes steam converter valve to import and export vapor pressure poor when larger, also can ensure effect of easing stress, need not increase restricting orifice decompression, simple in structure, has shortened device structure.

Brief description of the drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the structural representation that the utility model spool is arranged in stroke.

Fig. 3 is the structural representation that the utility model spool is positioned at down stroke.

In figure: 1-valve body; 2-spool; 3-steam inlet; 4-steam (vapor) outlet; 5-inner sleeve; 501-second orifice, 6-outer sleeve; 601-the first aperture; 7-slide; 8-nozzle; 801-the 3rd aperture; 9-seal ring; 10-lower flange; 11-valve gap; 12-actuator; 13-handwheel; The import of 14-cooling water; 15-radiating fin.

Embodiment

Below in conjunction with Figure of description, the technical solution of the utility model is described in further detail.

As shown in Figure 1, the utility model comprises valve body 1, be located at the spool 2 in valve body 1, inner sleeve 5, be coated at the outer sleeve 6 of inner sleeve 5, the actuating device moving up and down with movable valve plug 2, valve body 1 left and right sides is respectively equipped with steam inlet 3 and steam (vapor) outlet 4, inner sleeve 5, on outer sleeve 6, be respectively equipped with multiple second orifices 501, the first aperture 601, outer sleeve 6 is fixed on valve body 1, cut off steam inlet 3 and enter the passage in valve, the first aperture 601 of outer sleeve 6 communicates with steam inlet 3, inner sleeve 5 is fixed on spool 2 by fastening piece, moving up and down of spool 2 drives inner sleeve 5 to move thereupon, the also respective change of quantity that second orifice 501 on inner sleeve 5 is relative with the first aperture 601 on outer sleeve 6, the lower end of described spool 2 is provided with slide 7, described slide 7 is positioned at inner sleeve 5 chambeies, the connection chamber that Open Side Down is offered at the middle part of slide 7, valve body 1 lower end is provided with the nozzle 8 matching with slide connection chamber, nozzle 8 is hollow cylindrical, which is provided with multiple the 3rd apertures 801, the connection chamber of nozzle 8 tops and slide 7 is slidably connected, and the quantity that slide connection chamber inwall blocks nozzle 8 the 3rd aperture 801 changes thereupon.The inner chamber of outer sleeve 6 comprises the first chamber section that is positioned at epimere, is positioned at the second chamber section of hypomere, and the internal diameter of the first chamber section is greater than the internal diameter of the second chamber section; The periphery of inner sleeve 5 is stepped, comprise be positioned at epimere the first shaft part, be positioned at the second shaft part of hypomere, the external diameter of the first shaft part is greater than the second shaft part external diameter, the first chamber section of outer sleeve 6 and the first shaft part of inner sleeve 5 match, the second chamber section of outer sleeve 6 and the second shaft part of inner sleeve 5 match, the first aperture 601 is located at the first chamber Duan Chu of outer sleeve 6, and second orifice 501 is located at the second shaft part place of inner sleeve 5; The first shaft part is offered seal groove, and seal groove is embedded with seal ring 9.The bottom of valve body 1 is provided with lower flange 10, lower flange 10 is connected with valve body 1 by fastening piece, the middle part of lower flange 10 is provided with the cooling water import 14 of up/down perforation, cooling water import 14 is provided with nozzle 8 upwards, the inner chamber of nozzle 8 communicates with cooling water import 14, between lower flange 10 and valve body 1, is provided with seal ring.

Avoid the impact that high temperature is caused driving mechanism, the top of valve body 1 connects valve gap 11, and the top of valve gap 11 connects actuator 12, and valve gap 11 peripheries are provided with the radiating fin 15 of multi-disc parallel arrangement, and the through hole for wearing spool 2 is established at the middle part of valve gap 11; Actuator 12 comprises actuating motor, the Worm and worm-wheel gearing being connected with actuating motor output shaft, the output terminal of Worm and worm-wheel gearing connects spool 2 and moves up and down with band movable valve plug 2, and actuator 12 also comprises that the handwheel 13 being connected with driving mechanism moves up and down with manual band movable valve plug 2.

For avoiding impacting and stringing is installed conveniently, the pipeline section of steam inlet 3 and steam (vapor) outlet 4 is smoothly connected and forms by circular arc, and the circular arc tangential line slope of pipeline reduces to zero again by zero increase gradually, and steam inlet 3 ends are equal with steam (vapor) outlet 4 Duan centers.

In order to improve mixing efficiency, inner sleeve 5 lower end surfaces are lower than slide connection chamber, and the cylindrical section of establishing the 3rd aperture 801 on nozzle 8 is arranged in inner sleeve 5 chambeies.Arrange arrange on the height, nozzle 8 of the first aperture 601 height of the 3rd aperture 801 of outer sleeve 6 is all less than the arrange height of second orifice 501 of inner sleeve 5, establishes the first aperture 601 is established in the position of the 3rd aperture 801 position lower than outer sleeve 6 on nozzle 8.

For improve connect reliability, the top outward of outer sleeve 6 forms the first joint, the first connection part between valve body 1 and valve gap 11, between the first joint and valve gap 11 and and valve body 1 between be equipped with seal ring; Outer sleeve 6 lower ends are provided with the second joint of indent, the inner of steam inlet 3 is provided with the boss matching with the second joint, between boss and the second joint, be provided with seal ring, outer sleeve 6 peripheries and steam inlet the inner offset, and valve body 1 is connected that by fastening piece outer sleeve 6 is gripped with valve gap 11.

Working principle:

Actuating motor is driven by controller, in the time that steam flow increases, for keeping flow velocity, on actuating motor band movable valve plug 2, move, increase second orifice 501 quantity relative with the first aperture 601, on slide 7, move simultaneously, make nozzle 8 enter the shorten length of slide 7 connection chambers, increase the quantity that exposes of the 3rd aperture 801.As shown in Figure 1, spool 2 is in up stroke, and all second orifices 501 are all relative with the first aperture 601, and the 3rd aperture 801 all exposes, and now, flow is maximum.In the time that steam flow reduces, for keeping flow velocity, as shown in Figure 2, actuating motor band movable valve plug 2 moves down, and reduces second orifice 501 quantity relative with the first aperture 601, and slide 7 moves down simultaneously, the length that makes nozzle 8 enter slide 7 connection chambers increases, and reduces the quantity that exposes of the 3rd aperture 801.In the time that steam flow reduces to zero, as shown in Figure 3, actuating motor band movable valve plug 2 arrives down stroke, the quantity that second orifice 501 is relative with the first aperture 601 reduces to zero, simultaneously, when nozzle 8, enter the length of slide 7 connection chambers for maximum, the 3rd aperture 801 is all coated by the chamber wall of slide 7 connection chambers, while stoping cooling water, enters in inner sleeve chamber.

A kind of steam pressure-reducing desuperheat valve shown in above Fig. 1,2,3 is specific embodiment of the utility model; the utility model substantive distinguishing features and progress are embodied; can be according to actual use needs; under enlightenment of the present utility model; it is carried out to the equivalent modifications of the aspects such as shape, structure, all at the row of the protection domain of this programme.

Claims (9)

1. a steam pressure-reducing desuperheat valve, comprise valve body (1), be located at the spool (2) in valve body (1), the actuating device that band movable valve plug (2) moves up and down, described valve body (1) left and right sides is respectively equipped with steam inlet (3) and steam (vapor) outlet (4), it is characterized in that: also comprise inner sleeve (5), be coated at the outer sleeve (6) of inner sleeve (5), described inner sleeve (5), on outer sleeve (6), be respectively equipped with multiple second orifices (501), the first aperture (601), described outer sleeve (6) is fixed on valve body (1), cut off steam inlet (3) and enter the passage in valve, first aperture (601) of outer sleeve (6) communicates with steam inlet (3), described inner sleeve (5) is fixed on spool (2) by fastening piece, moving up and down of spool (2) drives inner sleeve (5) to move thereupon, the also respective change of quantity that second orifice (501) on inner sleeve (5) is relative with the first aperture (601) on outer sleeve (6), the lower end of described spool (2) is provided with slide (7), described slide (7) is positioned at inner sleeve (5) chamber, the connection chamber that Open Side Down is offered at the middle part of described slide (7), valve body (1) lower end is provided with the nozzle (8) matching with slide connection chamber, described nozzle (8) is hollow cylindrical, which is provided with multiple the 3rd apertures (801), the connection chamber of nozzle (8) top and slide (7) is slidably connected, and the quantity that slide connection chamber inwall blocks nozzle (8) the 3rd aperture (801) changes thereupon, described inner sleeve (5) chamber communicates with second orifice (501), steam (vapor) outlet (4).
2. a kind of steam pressure-reducing desuperheat valve according to claim 1, is characterized in that: the inner chamber of outer sleeve (6) comprises the first chamber section that is positioned at epimere, be positioned at the second chamber section of hypomere, the internal diameter of the first described chamber section is greater than the internal diameter of the second chamber section; The periphery of inner sleeve (5) is stepped, comprise be positioned at epimere the first shaft part, be positioned at the second shaft part of hypomere, the external diameter of the first described shaft part is greater than the second shaft part external diameter, the first chamber section of outer sleeve (6) and the first shaft part of inner sleeve (5) match, the second chamber section of outer sleeve (6) and the second shaft part of inner sleeve (5) match, described the first aperture (601) is located at the first chamber Duan Chu of outer sleeve (6), and described second orifice (501) is located at the second shaft part place of inner sleeve (5); The first described shaft part is offered seal groove, and seal groove is embedded with seal ring (9).
3. a kind of steam pressure-reducing desuperheat valve according to claim 2, it is characterized in that: the bottom of described valve body (1) is provided with lower flange (10), lower flange (10) is connected with valve body (1) by fastening piece, the middle part of lower flange (10) is provided with the cooling water import (14) of up/down perforation, cooling water import (14) is provided with nozzle (8) upwards, the inner chamber of nozzle (8) communicates with cooling water import (14), between lower flange (10) and valve body (1), is provided with seal ring.
4. a kind of steam pressure-reducing desuperheat valve according to claim 3, it is characterized in that: the top of valve body (1) connects valve gap (11), the top of valve gap (11) connects actuator (12), described valve gap (11) periphery is provided with the radiating fin (15) of multi-disc parallel arrangement, and the through hole for wearing spool (2) is established at the middle part of valve gap (11); Described actuator (12) comprises actuating motor, and with the Worm and worm-wheel gearing that actuating motor output shaft is connected, the output terminal of Worm and worm-wheel gearing connects spool (2) to be with movable valve plug (2) to move up and down.
5. a kind of steam pressure-reducing desuperheat valve according to claim 4, is characterized in that: described actuator (12) also comprises that the handwheel (13) being connected with driving mechanism moves up and down with manual band movable valve plug (2).
6. a kind of steam pressure-reducing desuperheat valve according to claim 1, it is characterized in that: the pipeline section of steam inlet (3) and steam (vapor) outlet (4) is smoothly connected and forms by circular arc, the circular arc tangential line slope of pipeline reduces to zero again by zero increase gradually, and steam inlet (3) end is equal with steam (vapor) outlet (4) Duan center.
7. a kind of steam pressure-reducing desuperheat valve according to claim 1, is characterized in that: inner sleeve (5) lower end surface is lower than slide connection chamber, and the cylindrical section of establishing the 3rd aperture (801) on nozzle (8) is arranged in inner sleeve (5) chamber.
8. a kind of steam pressure-reducing desuperheat valve according to claim 7, it is characterized in that: arrange arrange on the height, nozzle (8) of the first aperture (601) height of the 3rd aperture (801) of described outer sleeve (6) is all less than the arrange height of second orifice (501) of inner sleeve (5), and the position of the first aperture (601) is established in the position of establishing the 3rd aperture (801) on nozzle (8) lower than outer sleeve (6).
9. according to a kind of steam pressure-reducing desuperheat valve described in the arbitrary claim of claim 1-8, it is characterized in that: the top outward of described outer sleeve (6) forms the first joint, the first described connection part between valve body (1) and valve gap (11), between the first joint and valve gap (11) and and valve body (1) between be equipped with seal ring; Outer sleeve (6) lower end is provided with the second joint of indent, the inner of steam inlet (3) is provided with the boss matching with the second joint, between boss and the second joint, be provided with seal ring, outer sleeve (6) periphery and steam inlet (3) the inner offset, and valve body (1) is connected that by fastening piece outer sleeve (6) is gripped with valve gap (11).
CN201320852063.0U 2013-12-20 2013-12-20 Steam pressure reducing and temperature lowering valve CN203770774U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320852063.0U CN203770774U (en) 2013-12-20 2013-12-20 Steam pressure reducing and temperature lowering valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320852063.0U CN203770774U (en) 2013-12-20 2013-12-20 Steam pressure reducing and temperature lowering valve

Publications (1)

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CN203770774U true CN203770774U (en) 2014-08-13

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CN201320852063.0U CN203770774U (en) 2013-12-20 2013-12-20 Steam pressure reducing and temperature lowering valve

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103899808A (en) * 2013-12-20 2014-07-02 罗林华 Steam pressure reducing cooling valve
CN104791606A (en) * 2015-05-07 2015-07-22 仪征祥源动力供应有限公司 Small-flow steam control system
CN107255181A (en) * 2017-06-28 2017-10-17 哈电集团哈尔滨电站阀门有限公司 Steam support type steam converter valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103899808A (en) * 2013-12-20 2014-07-02 罗林华 Steam pressure reducing cooling valve
CN104791606A (en) * 2015-05-07 2015-07-22 仪征祥源动力供应有限公司 Small-flow steam control system
CN107255181A (en) * 2017-06-28 2017-10-17 哈电集团哈尔滨电站阀门有限公司 Steam support type steam converter valve

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