CN104896109A - Pressure reducing valve - Google Patents
Pressure reducing valve Download PDFInfo
- Publication number
- CN104896109A CN104896109A CN201510292025.8A CN201510292025A CN104896109A CN 104896109 A CN104896109 A CN 104896109A CN 201510292025 A CN201510292025 A CN 201510292025A CN 104896109 A CN104896109 A CN 104896109A
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- CN
- China
- Prior art keywords
- flap
- opening
- valve
- passage
- main valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/48—Attaching valve members to screw-spindles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a pressure reducing valve which comprises a valve clack and a valve disk and a valve rod (30) disposed inside a valve body, wherein the middle part of the valve disk is connected to one end of the valve rod (30), a balance hole channel (25) is disposed around the center axis of the valve disk, the balance channel (25) is used to communicate two kinds of space divided by the valve disk, the valve rod (30) is movably connected to the valve disk, and the valve rod (30) can isolate the two kinds of space divided by the valve disk when the valve rod moves to a preset position. The pressure reducing valve controls a leakage rate, realizes balance and leakage control, effectively prevents media leakage and thus reduces pressure losses.
Description
Technical field
The present invention relates to valve field, particularly relate to a kind of reduction valve.
Background technique
Along with national energy-saving reduces discharging the further enforcement of strategy, various pressure facility fast development, the Large Copacity large-sized unit pressure facility development with steam being particularly power source is rapid, and wherein reduction valve is particularly that the purposes of the power station high-temperature high-pressure pressure-reducing valve of medium is more and more wider with steam.
Traditional reduction valve is the structure of simple flap and valve rod, and valve rod connects flap and provides hoisting capacity for the operation of flap, but due to the effect of medium power, the closing forces pushed away under making flap is comparatively large, and the opening force above opened is less, thus causes fluctuation of service.In order to address this problem, flap be provided with equalizing orifice passage to be communicated with the space of flap segmentation, enabling certain media by equalizing orifice channel flow, medium power is balanced, reduce the hoisting capacity of flap.But due to the existence of equalizing orifice passage, make medium can be flowed out by equalizing orifice passage, when not needing balance media power, still can there is the situation of leakage in medium, cause the loss of pressure.
Therefore, how to prevent the leakage of medium from being the current technical issues that need to address of those skilled in the art to reduce the pressure loss when not needing balance media power.
Summary of the invention
The object of this invention is to provide a kind of reduction valve, the leakage of medium can be prevented when not needing balance media power and then reduce the pressure loss.
For solving the problems of the technologies described above, the invention provides a kind of reduction valve, comprise and be arranged at flap in valve body and valve rod, be connected with one end of described valve rod in the middle part of described flap, the central axis of described flap is provided with equalizing orifice passage, described equalizing orifice passage is for being communicated with two spaces of described flap segmentation, and described valve rod is connected with described flap is removable, and can completely cut off two spaces of described flap segmentation when described valve rod moves to predeterminated position.
Preferably, described flap comprises main valve clack and secondary flap, the middle part of described main valve clack is provided with main valve clack passage, described main valve clack passage comprises the first opening be arranged on the first working surface of described main valve clack and the second opening be arranged on the second working surface of described main valve clack, the middle part of described secondary flap is provided with secondary flap passage, described secondary flap passage comprises the 3rd opening be arranged on the 3rd working surface of described secondary flap and the 4th opening be arranged on the 4th working surface of described secondary flap, described equalizing orifice channel setting in described secondary flap channel circumference and with described main valve clack channel connection, described secondary flap is fixedly installed in described second opening, described valve rod also can slide along described secondary flap passage through described secondary flap passage, one end of described valve rod is arranged between described first opening and described 3rd opening and also can seals described first opening.
Preferably, described valve rod is provided with positive stop lug boss, the profile of described positive stop lug boss exceedes the profile of described 3rd opening and between described first opening and described 3rd opening, is provided with and supports the two elastic member between described first opening and described positive stop lug boss.
Preferably, described elastic member is specially compact type butterfly spring.
Preferably, described secondary flap is installed in described second opening, and described second working surface and described 4th working surface are in same plane.
Preferably, also comprise stuffing box gland and be loaded on shrouding of described main valve clack outside, and described in shroud can relative sliding with described main valve clack, described first working surface is provided with ring decompression wall, described ring decompression wall is provided with multiple first segment discharge orifice, described in shroud with described ring decompression wall corresponding region be provided with multiple second section discharge orifice.
Preferably, described first segment discharge orifice is arranged in order along the axial and circumferential of described ring decompression wall, and the axial and circumferential shrouded described in described second section discharge orifice edge are arranged in order.
Preferably, shroud end described in and be provided with limited ring for limiting the movement of described ring decompression wall.
Preferably, described main valve clack periphery is provided with seal ring.
Preferably, described seal ring is specially containing the flexible hard carbon seal ring of antimony.
Reduction valve provided by the invention, comprise and be arranged at flap in valve body and valve rod, the equalizing orifice passage in two spaces for being communicated with flap segmentation is provided with at the central axis of flap, and valve rod is connected with flap is removable, two spaces of flap segmentation when valve rod moves to predeterminated position, can be completely cut off.When needs balance media power, mobile valve rod makes two spaces be communicated with, and when not needing balance media power, mobile valve rod makes two spaces completely cut off, and controls leakage rate, reaches balance and reveals controlled effect, effectively prevents the leakage of medium and then reduces the pressure loss.
Further, by arranging, there is shrouding and ring decompression wall of throttle orifice, realizing second depressurized and reducing noise.
Accompanying drawing explanation
Fig. 1 is the structural representation of the buttoned-up status of a kind of embodiment of reduction valve provided by the present invention;
Fig. 2 is the structural representation of the preloading condition of a kind of embodiment of reduction valve provided by the present invention;
Fig. 3 is the structural representation of the small flow adjustment state of a kind of embodiment of reduction valve provided by the present invention;
Fig. 4 is the structural representation of the large discharge adjustment state of a kind of embodiment of reduction valve provided by the present invention.
Embodiment
Core of the present invention is to provide a kind of reduction valve, can prevent the leakage of medium and then reduce the pressure loss when not needing balance media power.
In order to make those skilled in the art person understand the present invention program better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 1 to Fig. 4, Fig. 1 is the structural representation of the buttoned-up status of a kind of embodiment of reduction valve provided by the present invention; Fig. 2 is the structural representation of the preloading condition of a kind of embodiment of reduction valve provided by the present invention; Fig. 3 is the structural representation of the small flow adjustment state of a kind of embodiment of reduction valve provided by the present invention; Fig. 4 is the structural representation of the large discharge adjustment state of a kind of embodiment of reduction valve provided by the present invention.
The reduction valve that the specific embodiment of the invention provides, comprise and be arranged at flap in valve body and valve rod 30, the equalizing orifice passage 25 in two spaces for being communicated with flap segmentation is provided with at the central axis of flap, and valve rod 30 is connected with flap is removable, two spaces of flap segmentation when valve rod 30 moves to predeterminated position, can be completely cut off.When needs balance media power, mobile valve rod 30 makes two spaces be communicated with, when not needing balance media power, mobile valve rod 30 makes two spaces completely cut off, control leakage rate, reach balance and reveal controlled effect, effectively prevent the leakage of medium and then reduce the pressure loss.
The reduction valve that the specific embodiment of the invention provides, comprises main valve clack 10, secondary flap 20 and valve rod 30.Wherein the middle part of main valve clack 10 is provided with main valve clack passage, its first opening 11 is arranged on the first working surface 12 of main valve clack 10, second opening 13 is arranged on the second working surface 14 of main valve clack 10, wherein the middle part of secondary flap 20 is provided with secondary flap passage, wherein the 3rd opening 21 is arranged on the 3rd working surface 22 of secondary flap 20, and the 4th opening 23 is arranged on the 4th working surface 24 of secondary flap 20.Secondary flap channel circumference is provided with equalizing orifice passage 25, and its both ends open is arranged at the 3rd working surface 22 and the first working surface 24 respectively, and equalizing orifice passage 25 and main valve clack channel connection.Secondary flap 20 is fixedly installed in the second opening 14, valve rod 30 through secondary flap passage and one end of valve rod 30 the first opening 11 and the 3rd opening 21, valve rod 30 can slide along secondary flap passage, when one end motion is to when the limit position of the first opening 11, the first opening 11 can be sealed.
When needs balance media power, one end of valve rod 30 is moved to the direction near the 3rd opening 21, make the first working surface 12 space outerpace, the first opening 11, main valve clack passage, between equalizing orifice passage 25 and the 4th working surface 24 space outerpace, form the passage of connection, make media flow serve the effect of balance media power.
When not needing balance media power, one end of valve rod 30 moves to the limit position near the first opening 11, seals the first opening 11, medium can not be flowed.Control leakage rate, reach balance and reveal controlled effect, effectively prevent the leakage of medium and then reduce the pressure loss.Also other isolated modes can be adopted; as being provided with the catch corresponding with equalizing orifice passage 25 at the end of valve rod 30; catch is arranged in the cavity of flap; and valve rod 30 can drive catch to rotate; catch is made can optionally to block equalizing orifice passage 25 in rotary course; as long as the connection in two spaces optionally can be controlled with isolated, all within protection scope of the present invention.
In the reduction valve that the specific embodiment of the invention provides, in order to accurately control opening and closing, positive stop lug boss 31 can be set on valve rod 30, the profile of positive stop lug boss 31 more than the 3rd opening 21 profile and between the first opening 11 and the 3rd opening 21, and between the first opening 11 and positive stop lug boss 31, be provided with the elastic member 32 of support both of them.When secondary flap 20 part is opened, medium is revealed on a small quantity, and elastic member 32 is in preloading condition, makes flap and actuator's no-idle running, and then guarantees degree of regulation.When not arranging elastic member 32, as long as ensure that reduction valve normally works, all within protection scope of the present invention.
In the reduction valve that above-mentioned embodiment provides, elastic member 32 can be compact type butterfly spring, makes control more accurate, also can arrange the elastic member 32 of other types, as reed, all within protection scope of the present invention.
In the reduction valve that the specific embodiment of the invention provides, secondary flap 20 can be installed in the second opening 13, the second working surface 14 and the 4th working surface 24 are in same plane.This mode has saved space.Also other positions can be arranged at, as being installed on the second working surface 14 by secondary flap 20, as long as ensure channel connection, all within protection scope of the present invention.
In the reduction valve that the specific embodiment of the invention provides, in order to play better effect of easing stress, 40 can be shrouded at main valve clack 10 outside seal suit, shrouding 40 can relative sliding with main valve clack 10, and ring decompression wall 50 is set on the first working surface 12, ring decompression wall 50 is provided with multiple first segment discharge orifice 51, and multiple second section discharge orifice 41 is set with ring decompression wall 50 corresponding region shrouding on 40.
When not needing to carry out second depressurized, main valve clack 10 moves, first segment discharge orifice 51 and second section discharge orifice 41 are staggered, and medium can not circulate, when needs carry out second depressurized, main valve clack 10 oppositely movement, first segment discharge orifice 51 is relative with second section discharge orifice 41, and medium can circulate, but passes through throttle orifice due to needs, build-up of pressure loses thus realizes second depressurized, and efficiently reduces noise.When do not arrange shroud 40 time, reduction valve still can play the effect of control media power, also within protection scope of the present invention.
In order to realize accurate second depressurized further, the axial and circumferential of the wall 50 that first segment discharge orifice 51 annularly can be reduced pressure are arranged in order, and are arranged in order by second section discharge orifice 41 along the axial and circumferential shrouding 40.When main valve clack 10 and secondary flap 20 are in closed condition, as shown in Figure 1, the first opening 11 seals, and throttle orifice staggers, and guarantees zero leakage; When main valve clack 10 is in closed condition, secondary flap 20 is opened, and as shown in Figure 2, the first opening 11 is opened, and throttle orifice staggers, and reduction valve is in a small amount of leak condition, and elastic member 32 is in preloading condition, and flap and actuator's no-idle running guarantee degree of regulation; When main valve clack 10 and secondary flap 20 are all opened, as shown in Figure 3, the first opening 11 is opened, and Orifice portion staggers, part circulation, and reduction valve is in small flow and regulates, and flap is in stress balance state, and actuator's thrust is relatively little; When main valve clack 10 continues to open, as Fig. 4, be in large discharge adjustment state, flap still keeps state of equilibrium, second depressurized onset, by main valve clack 10 and the relative movement shrouding 40, control the circulation area of throttle orifice, make uninterrupted adjustable, and then realize more accurate second depressurized.Also according to the arrangement mode of actual conditions adjustment throttle orifice, all within protection scope of the present invention.
In the reduction valve that the specific embodiment of the invention provides; limited ring 42 can being set shrouding 40 ends, carrying out spacing, when not arranging limited ring to the movement of ring decompression wall 50; as long as ensure the normal work of reduction valve, all within protection scope of the present invention.
In order to play better seal action, can arrange seal ring 15 in the periphery of main valve clack 10, seal ring 15 has polytype, can be specially containing the flexible hard carbon seal ring of antimony, can play seal action, can reach effectiveness in vibration suppression again.Also seal ring or other sealing means of other types can be adopted, all within protection scope of the present invention.
Above reduction valve provided by the present invention is described in detail.Apply specific case herein to set forth principle of the present invention and mode of execution, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (10)
1. a reduction valve, comprise and be arranged at flap in valve body and valve rod (30), be connected with one end of described valve rod (30) in the middle part of described flap, the central axis of described flap is provided with equalizing orifice passage (25), described equalizing orifice passage (25) is for being communicated with two spaces of described flap segmentation, it is characterized in that, described valve rod (30) is connected with described flap is removable, and can completely cut off two spaces of described flap segmentation when described valve rod (30) moves to predeterminated position.
2. reduction valve according to claim 1, it is characterized in that, described flap comprises main valve clack (10) and secondary flap (20), the middle part of described main valve clack (10) is provided with main valve clack passage, described main valve clack passage comprises the first opening (11) be arranged on first working surface (12) of described main valve clack (10) and the second opening (13) be arranged on second working surface (14) of described main valve clack (10), the middle part of described secondary flap (20) is provided with secondary flap passage, described secondary flap passage comprises the 3rd opening (21) be arranged on the 3rd working surface (22) of described secondary flap and the 4th opening (23) be arranged on the 4th working surface (24) of described secondary flap (20), described equalizing orifice passage (25) be arranged at described secondary flap channel circumference and with described main valve clack channel connection, described secondary flap (20) is fixedly installed in described second opening (13), described valve rod (30) also can slide along described secondary flap passage through described secondary flap passage, one end of described valve rod (30) is arranged between described first opening (11) and described 3rd opening (21) and also can seals described first opening (11).
3. reduction valve according to claim 2, it is characterized in that, described valve rod (30) is provided with positive stop lug boss (31), the profile of described positive stop lug boss (31) exceedes the profile of described 3rd opening (21) and is positioned between described first opening (11) and described 3rd opening (21), is provided with and supports the two elastic member (32) between described first opening (11) and described positive stop lug boss (31).
4. reduction valve according to claim 3, is characterized in that, described elastic member (32) is specially compact type butterfly spring.
5. reduction valve according to claim 2, it is characterized in that, described secondary flap (20) is installed in described second opening (13), and described second working surface (14) and described 4th working surface (24) are in same plane.
6. the reduction valve according to claim 2 to 5 any one, it is characterized in that, also comprise stuffing box gland and be loaded on outside the shrouding (40) of described main valve clack (10), and described in shroud (40) and described main valve clack (10) can relative sliding, described first working surface (12) is provided with ring decompression wall (50), described ring decompression wall (50) is provided with multiple first segment discharge orifice (51), described in shroud that (40) are upper is provided with multiple second section discharge orifice (41) with described ring decompression wall (50) corresponding region.
7. reduction valve according to claim 6, it is characterized in that, described first segment discharge orifice (51) is arranged in order along the axial and circumferential of described ring decompression wall (50), and the axial and circumferential shrouding (40) described in described second section discharge orifice (41) edge are arranged in order.
8. reduction valve according to claim 6, is characterized in that, described in shroud (40) end and be provided with limited ring (42) for limiting the movement of described ring decompression wall (50).
9. reduction valve according to claim 6, is characterized in that, described main valve clack (10) periphery is provided with seal ring (15).
10. reduction valve according to claim 9, is characterized in that, described seal ring (15) is specially containing the flexible hard carbon seal ring of antimony.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510292025.8A CN104896109A (en) | 2015-05-29 | 2015-05-29 | Pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510292025.8A CN104896109A (en) | 2015-05-29 | 2015-05-29 | Pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104896109A true CN104896109A (en) | 2015-09-09 |
Family
ID=54028962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510292025.8A Pending CN104896109A (en) | 2015-05-29 | 2015-05-29 | Pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104896109A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422881A (en) * | 2015-09-25 | 2016-03-23 | 上海发电设备成套设计研究院 | Valve clack of labyrinth type release valve |
| CN107906368A (en) * | 2017-12-08 | 2018-04-13 | 杭州华惠阀门有限公司 | A kind of reducing-and-cooling plant |
| CN109210272A (en) * | 2018-10-16 | 2019-01-15 | 江苏高特阀业有限公司 | High temperature and pressure double containment electric control valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2097319A5 (en) * | 1970-07-02 | 1972-03-03 | Gratzmuller Jean Louis | Reducing valve - with ptfe bushing for piston |
| CN2146616Y (en) * | 1992-12-16 | 1993-11-17 | 乐山市长江仪表厂 | Flow-limiting double-seal auxiliary stopping valve |
| CN203230907U (en) * | 2013-05-09 | 2013-10-09 | 哈尔滨松林电站设备有限公司 | Cavitation-resistant regulated drain valve |
| CN203348561U (en) * | 2013-05-24 | 2013-12-18 | 哈尔滨松林电站设备有限公司 | Rapid opening and closing valve |
| CN203421182U (en) * | 2013-09-02 | 2014-02-05 | 浙江金锋自动化仪表有限公司 | Multistage depressurization adjusting valve |
| CN103939624A (en) * | 2014-05-09 | 2014-07-23 | 杭州华惠阀门有限公司 | Reducing valve |
| CN204647344U (en) * | 2015-05-29 | 2015-09-16 | 杭州华惠阀门有限公司 | A kind of reduction valve |
-
2015
- 2015-05-29 CN CN201510292025.8A patent/CN104896109A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2097319A5 (en) * | 1970-07-02 | 1972-03-03 | Gratzmuller Jean Louis | Reducing valve - with ptfe bushing for piston |
| CN2146616Y (en) * | 1992-12-16 | 1993-11-17 | 乐山市长江仪表厂 | Flow-limiting double-seal auxiliary stopping valve |
| CN203230907U (en) * | 2013-05-09 | 2013-10-09 | 哈尔滨松林电站设备有限公司 | Cavitation-resistant regulated drain valve |
| CN203348561U (en) * | 2013-05-24 | 2013-12-18 | 哈尔滨松林电站设备有限公司 | Rapid opening and closing valve |
| CN203421182U (en) * | 2013-09-02 | 2014-02-05 | 浙江金锋自动化仪表有限公司 | Multistage depressurization adjusting valve |
| CN103939624A (en) * | 2014-05-09 | 2014-07-23 | 杭州华惠阀门有限公司 | Reducing valve |
| CN204647344U (en) * | 2015-05-29 | 2015-09-16 | 杭州华惠阀门有限公司 | A kind of reduction valve |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422881A (en) * | 2015-09-25 | 2016-03-23 | 上海发电设备成套设计研究院 | Valve clack of labyrinth type release valve |
| CN105422881B (en) * | 2015-09-25 | 2018-04-20 | 上海发电设备成套设计研究院 | A kind of labyrinth type discharge valve flap |
| CN107906368A (en) * | 2017-12-08 | 2018-04-13 | 杭州华惠阀门有限公司 | A kind of reducing-and-cooling plant |
| CN109210272A (en) * | 2018-10-16 | 2019-01-15 | 江苏高特阀业有限公司 | High temperature and pressure double containment electric control valve |
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Application publication date: 20150909 |
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| RJ01 | Rejection of invention patent application after publication |