CN113898754A - PCV relief valve that overhauls on line - Google Patents
PCV relief valve that overhauls on line Download PDFInfo
- Publication number
- CN113898754A CN113898754A CN202010642430.9A CN202010642430A CN113898754A CN 113898754 A CN113898754 A CN 113898754A CN 202010642430 A CN202010642430 A CN 202010642430A CN 113898754 A CN113898754 A CN 113898754A
- Authority
- CN
- China
- Prior art keywords
- valve
- core
- pcv
- cover
- seat
- 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
Links
- 238000007789 sealing Methods 0.000 claims abstract description 25
- 239000000945 filler Substances 0.000 claims abstract description 8
- 210000004907 gland Anatomy 0.000 claims description 11
- 238000012423 maintenance Methods 0.000 abstract description 16
- 230000008859 change Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- MEOSMFUUJVIIKB-UHFFFAOYSA-N [W].[C] Chemical compound [W].[C] MEOSMFUUJVIIKB-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
- F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical 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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/041—Construction of housing; Use of materials therefor of sliding valves cylindrical slide valves
-
- 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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
- F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
- F16K3/243—Packings
-
- 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
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
- F16K47/023—Means in valves for absorbing fluid energy for preventing water-hammer or noise for preventing water-hammer, e.g. damping of the valve movement
-
- 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
Abstract
The invention provides an online maintenance PCV release valve, wherein a valve seat is arranged in a valve body, one end of a valve core is arranged in the center of the valve seat, the other end of the valve core is arranged in a valve cover, a filler is arranged between the other end of the valve core and the valve cover, the filler is compressed by a pressure plate above the valve cover, and the pressure plate is connected with the valve cover through a plurality of groups of first bolts and first nuts; a first sealing ring and a labyrinth core bag are sequentially arranged on the valve core towards one end far away from the valve seat. The valve core and the valve seat can be taken down as long as the valve cover is detached, the valve core and the valve seat can be continuously used without detaching the valve body, and the valve is very convenient; the labyrinth core plays the roles of reducing pressure and noise, and prevents the sealing surfaces of the valve core and the valve seat from being damaged by garbage.
Description
Technical Field
The invention belongs to the technical field of power station equipment, and particularly relates to a PCV (positive crankcase ventilation) release valve for online maintenance.
Background
The pcv (pressure Control valve) electromagnetic relief valve in the prior art is a hard seal ball valve, and the internal structure of the pcv (pressure Control valve) electromagnetic relief valve is shown in fig. 1, and includes a valve body 6, a valve seat 5 welded to the valve body 6, a valve core 3 arranged in the valve body 6, the valve core 3 located at the junction of a flow passage in the valve seat 5 and a flow passage in the valve body 6, and a valve rod 7 arranged at the upper end of the valve core 3, and the valve rod 7 is driven by a driving device to rotate so as to drive the valve core 3 to rotate, thereby realizing the 90-degree rotation opening/closing action form of the valve. The following technical drawbacks exist: 1) the valve core adopts a spherical structure, alloy steel is generally used, the surface of the valve core is treated by alloy such as carbon tungsten and the like through a high-speed spraying technology, but due to the difference of red hardness and cold and heat coefficients of inner and outer materials, the PCV electromagnetic relief valve can operate at high temperature difference and high pressure difference (the temperature of main steam at an inlet is 545-620 ℃, and the temperature of an outlet is atmospheric temperature for a long time; inlet pressure is 17 MPa-35 MPa of main steam pressure, and outlet pressure is atmospheric pressure), the deformation of the ball body is easily caused, the cracks and the falling of the spherical coating are frequently generated, the leakage and other faults of the valve are directly caused, and the valve is damaged after two to three times of general actions; 2) original PCV valve is the ball valve, installs on the pipeline, if case and disk seat damage, need follow the pipeline and dismantle the valve body, will control the valve body and unpack the back apart and just can change ball core and disk seat, and the maintenance is inconvenient, the purchase cycle length.
How to design a PCV relief valve for online maintenance and how to replace a valve core and a valve seat under the condition of not dismounting a valve body becomes a problem which needs to be solved urgently.
Disclosure of Invention
In view of the above disadvantages of the prior art, an object of the present invention is to provide an online maintenance PCV relief valve, which is used to solve the problems that the valve core in the prior art adopts a spherical structure, alloy steel is generally used, and the surface of the valve core is treated by a high-speed spraying technology using alloys such as carbon tungsten, but due to the difference between the red hardness and the cold and heat coefficients of the inner and outer materials, the PCV electromagnetic relief valve is easy to deform when it is operated for a long time under the conditions of high temperature difference and high pressure difference (the inlet is at 545-620 ℃ of the main steam temperature, the outlet is at atmospheric temperature; the inlet pressure is at 17-35 MPa of the main steam pressure, and the outlet is at atmospheric pressure), and the conditions of cracking and dropping of the spherical plating layer are frequently occurred, which directly causes the valve to have faults such as leakage, and the valve is damaged when the general actions are performed two to three times; original PCV valve is the ball valve, installs on the pipeline, if case and disk seat damage, need follow the pipeline and dismantle the valve body, will control the valve body and take apart the back and just can change ball core and disk seat, and the maintenance is inconvenient, the problem of purchase cycle length.
In order to achieve the purpose, the invention provides an online maintenance PCV release valve, which comprises a valve body, wherein a valve seat is arranged in the valve body, one end of a valve core is arranged in the center of the valve seat, the other end of the valve core is arranged in a valve cover, a filler is arranged between the other end of the valve core and the valve cover, the filler is compressed by a pressing plate above the valve cover, and the pressing plate is connected with the valve cover through a plurality of groups of first bolts and first nuts;
a first sealing ring and a labyrinth core bag are sequentially arranged on the valve core towards one end far away from the valve seat.
In an embodiment of the present invention, the outer ring of the middle portion of the valve cover is provided with a positioning sleeve.
In an embodiment of the present invention, the first sealing ring is disposed on an inner ring of the valve seat and contacts with the valve core.
In an embodiment of the invention, a second self-sealing ring is disposed between the outer ring of the valve seat and the valve body.
In an embodiment of the present invention, the outer ring of the valve cover is provided with a first self-sealing ring, and the outer ring of the first self-sealing ring is in contact with the valve body.
In an embodiment of the present invention, the positioning sleeve is disposed in the valve body, and the positioning sleeve can press the first self-sealing ring below the positioning sleeve.
In an embodiment of the invention, a gland is arranged above the valve body, a stepped hole is arranged in the center of the bottom surface of the gland, and the bottom surface of the stepped hole can compress the positioning sleeve.
In an embodiment of the invention, the outer ring of the gland is connected with the top surface of the valve body through a plurality of groups of second bolts and second nuts;
by adopting the technical scheme: the valve internals overhauls the convenience on line, can take off gland, valve gap, case, disk seat in proper order through dismantling second bolt and second nut, but quick replacement disk seat, case when the maintenance, the maintenance is extremely convenient, and disk seat, the case under the change can be restoreed, reduce the order expense of spare parts.
In an embodiment of the present invention, two flow passages are disposed in the valve body, both of the flow passages are communicated with the central hole of the valve seat, and the two flow passages are communicated or closed by the movement of the valve core.
In an embodiment of the present invention, the valve cover compresses the labyrinth core package, and the labyrinth core package compresses the valve seat;
by adopting the technical scheme: the flow is cut off by the movement of the valve core; when the valve core is opened, the flow passes through the labyrinth core bag to prevent the garbage from scouring the valve core.
As described above, the PCV release valve for online maintenance is reasonable in structure, the valve internals are convenient to maintain online, the valve core and the valve seat can be taken down as long as the valve cover is detached, the valve core and the valve seat can be continuously used after being replaced, and the valve body is not required to be detached, so that the PCV release valve is very convenient; the labyrinth core bag has the functions of reducing pressure and noise, prevents garbage from damaging the sealing surfaces of the valve core and the valve seat, and has good economic and social benefits when being popularized and applied.
Drawings
Fig. 1 is a schematic view of an internal installation structure of a hard seal ball valve in the prior art.
Fig. 2 is a schematic view of the internal mounting structure of the present invention.
FIG. 3 is a schematic diagram of a labyrinth core package according to the present invention.
In the figure: 1. a valve cover; 2. a first self-sealing ring; 3. a valve core; 4. a labyrinth core package; 5. a valve seat; 6. a valve body; 7. a valve stem; 8. a first sealing ring; 9. a second self-sealing ring; 10. a positioning sleeve; 11. and (7) pressing the cover.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 2 to 3. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
As shown in fig. 2, the invention provides an online maintenance PCV release valve, which comprises a valve body 6, wherein a valve seat 5 is arranged in the valve body 6, one end of a valve core 3 is arranged in the center of the valve seat 5, the other end of the valve core 3 is arranged in a valve cover 1, a filler is arranged between the other end of the valve core 3 and the valve cover 1, the filler is compressed by a pressing plate above the valve cover 1, and the pressing plate is connected with the valve cover 1 through a plurality of groups of first bolts and first nuts;
a first sealing ring 8 and a labyrinth core bag 4 are sequentially arranged on the valve core 3 towards one end far away from the valve seat 5;
the outer ring of the middle part of the valve cover 1 is provided with a positioning sleeve 10; the valve cover 1 and the positioning sleeve 10 are in threaded connection or welded;
the first sealing ring 8 is arranged on the inner ring of the valve seat 5 and is contacted with the valve core 3;
a second self-sealing ring 9 is arranged between the outer ring of the valve seat 5 and the valve body 6;
the outer ring of the valve cover 1 is provided with a first self-sealing ring 2, and the outer ring of the first self-sealing ring 2 is in contact with the valve body 6;
the positioning sleeve 10 is arranged in the valve body 6, and the positioning sleeve 10 can press the first self-sealing ring 2 below the positioning sleeve;
a gland 11 is arranged above the valve body 6, a step hole is formed in the center of the bottom surface of the gland 11, and the bottom surface of the step hole can compress the positioning sleeve 10;
the outer ring of the gland 11 is connected with the top surface of the valve body 6 through a plurality of groups of second bolts and second nuts; by adopting the technical scheme: the valve internals are convenient to maintain on line, the gland, the valve cover, the valve core and the valve seat can be sequentially taken down by disassembling the second bolt and the second nut, the valve seat and the valve core can be quickly replaced during maintenance, the maintenance is extremely convenient, the replaced valve seat and valve core can be repaired, and the ordering cost of spare parts is reduced;
two flow passages are arranged in the valve body 6, both flow passages are communicated with the central hole of the valve seat 5, and the two flow passages are communicated or closed through the movement of the valve core 3;
the valve cover 1 compresses the labyrinth core package 4, and the labyrinth core package 4 compresses the valve seat 5; by adopting the technical scheme: the flow is cut off by the movement of the valve core; when the valve core is opened, the flow passes through the labyrinth core bag to prevent the garbage from scouring the valve core;
as shown in fig. 3, the labyrinth core package 4 is formed by stacking a plurality of labyrinth sheets, each labyrinth sheet has a plurality of cocurrent ports, and the labyrinth sheets play a role in reducing noise by virtue of changes in flow area.
In specific implementation, the labyrinth core package 4 is formed by overlapping a plurality of labyrinth sheets to form a labyrinth anti-cavitation erosion-resistant brush core package, so that the pressure reduction is stable and accurate, the linearity and the sensitivity are well adjusted, the phenomena of erosion and the like are prevented from damaging the valve, and the vibration of the valve and the noise generated when a medium flows through the valve are reduced;
the valve body 6 is made of free forged steel, so that the valve body leakage accidents caused by sand holes, bubbles and cracks possibly generated due to loose molecular structure of a casting piece are avoided, and the service life of the valve is prolonged.
In conclusion, the online maintenance PCV release valve provided by the invention has the advantages that the structure is reasonable, the online maintenance of the valve internals is convenient, the valve core and the valve seat can be taken down as long as the valve cover is detached, the valve core and the valve seat can be continuously used without detaching the valve body, and the online maintenance PCV release valve is very convenient; the labyrinth core plays the roles of reducing pressure and noise, and prevents the sealing surfaces of the valve core and the valve seat from being damaged by garbage. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. An online service PCV relief valve, comprising a valve body (6), characterized in that: a valve seat (5) is arranged in the valve body (6), one end of a valve core (3) is arranged in the center of the valve seat (5), the other end of the valve core (3) is arranged in the valve cover (1), a filler is arranged between the other end of the valve core (3) and the valve cover (1), the filler is compressed by a pressing plate above the valve cover (1), and the pressing plate is connected with the valve cover (1) through a plurality of groups of first bolts and first nuts;
a first sealing ring (8) and a labyrinth core bag (4) are sequentially arranged on the valve core (3) towards one end far away from the valve seat (5).
2. An in-line service PCV relief valve according to claim 1, characterized in that: the middle outer ring of the valve cover (1) is provided with a positioning sleeve (10).
3. An in-line service PCV relief valve according to claim 2, characterized in that: the first sealing ring (8) is arranged on the inner ring of the valve seat (5) and is in contact with the valve core (3).
4. An in-line service PCV relief valve according to claim 3, wherein: and a second self-sealing ring (9) is arranged between the outer ring of the valve seat (5) and the valve body (6).
5. An in-line service PCV relief valve according to claim 4, wherein: the outer ring of the valve cover (1) is provided with a first self-sealing ring (2), and the outer ring of the first self-sealing ring (2) is in contact with the valve body (6).
6. An in-line service PCV relief valve according to claim 5, wherein: the positioning sleeve (10) is arranged in the valve body (6), and the positioning sleeve (10) can compress the first self-sealing ring (2) below the positioning sleeve.
7. An in-line service PCV relief valve according to claim 6, wherein: a gland (11) is arranged above the valve body (6), a step hole is formed in the center of the bottom surface of the gland (11), and the bottom surface of the step hole can compress the positioning sleeve (10).
8. An in-line service PCV relief valve according to claim 7, wherein: the outer ring of the gland (11) is connected with the top surface of the valve body (6) through a plurality of groups of second bolts and second nuts.
9. An in-line service PCV relief valve according to claim 8, characterized in that: two flow passages are arranged in the valve body (6), the two flow passages are communicated with a central hole of the valve seat (5), and the two flow passages are communicated or closed through the movement of the valve core (3).
10. An in-line service PCV release valve according to claim 9, characterized in that: the valve cover (1) compresses the labyrinth core bag (4), and the labyrinth core bag (4) compresses the valve seat (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010642430.9A CN113898754A (en) | 2020-07-06 | 2020-07-06 | PCV relief valve that overhauls on line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010642430.9A CN113898754A (en) | 2020-07-06 | 2020-07-06 | PCV relief valve that overhauls on line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113898754A true CN113898754A (en) | 2022-01-07 |
Family
ID=79186757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010642430.9A Pending CN113898754A (en) | 2020-07-06 | 2020-07-06 | PCV relief valve that overhauls on line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113898754A (en) |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2416064A1 (en) * | 1974-04-03 | 1975-10-16 | Babcock & Wilcox Ag | Speed controlling element for flow valve - comprises concentric apertured cylinders positioned to produce labyrinth path |
| EP0591873A1 (en) * | 1992-10-09 | 1994-04-13 | Bailey Japan Co., Ltd. | High differential pressure control valve |
| CN101413602A (en) * | 2008-11-20 | 2009-04-22 | 无锡智能自控工程有限公司 | High pressure labyrinth type anti-cavitation sleeve valve |
| CN201326825Y (en) * | 2008-11-20 | 2009-10-14 | 无锡智能自控工程有限公司 | High-pressure labyrinth anti-cavitation sleeve valve |
| US20100300565A1 (en) * | 2009-05-28 | 2010-12-02 | Sekhar Samy | Short stroke control valve |
| CN101956869A (en) * | 2010-10-11 | 2011-01-26 | 无锡智能自控工程有限公司 | Communicated labyrinth valve |
| CN201844074U (en) * | 2010-10-11 | 2011-05-25 | 无锡智能自控工程有限公司 | Communicated labyrinth valve |
| CN201963895U (en) * | 2011-03-11 | 2011-09-07 | 上海华尔德电站阀门有限公司 | Labyrinth-type stop valve |
| CN204004455U (en) * | 2014-08-18 | 2014-12-10 | 浙江金锋自动化仪表有限公司 | A kind of maze-type structure for modulating valve |
| CN104295752A (en) * | 2014-10-09 | 2015-01-21 | 兰州理工大学 | Multistage step-down sleeve adjusting valve |
| CN205781331U (en) * | 2016-06-08 | 2016-12-07 | 上海发电设备成套设计研究院 | A kind of axial-flow type labyrinth regulation valve |
| CN107061861A (en) * | 2016-11-25 | 2017-08-18 | 南通龙源电站阀门有限公司 | A kind of labyrinth type antiscour regulating valve |
| CN206458841U (en) * | 2017-01-24 | 2017-09-01 | 杭州东辰热力辅机有限公司 | A kind of labyrinth disc regulating valve |
| CN107289190A (en) * | 2017-08-14 | 2017-10-24 | 上海核阀门股份有限公司 | High Pressure Difference labyrinth regulating valve |
| CN207145756U (en) * | 2017-08-14 | 2018-03-27 | 上海一核阀门股份有限公司 | High Pressure Difference labyrinth regulating valve |
| CN209725433U (en) * | 2019-03-14 | 2019-12-03 | 高特自控阀门有限公司 | A kind of labyrinth type multilevel decompression regulating valve |
-
2020
- 2020-07-06 CN CN202010642430.9A patent/CN113898754A/en active Pending
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2416064A1 (en) * | 1974-04-03 | 1975-10-16 | Babcock & Wilcox Ag | Speed controlling element for flow valve - comprises concentric apertured cylinders positioned to produce labyrinth path |
| EP0591873A1 (en) * | 1992-10-09 | 1994-04-13 | Bailey Japan Co., Ltd. | High differential pressure control valve |
| CN101413602A (en) * | 2008-11-20 | 2009-04-22 | 无锡智能自控工程有限公司 | High pressure labyrinth type anti-cavitation sleeve valve |
| CN201326825Y (en) * | 2008-11-20 | 2009-10-14 | 无锡智能自控工程有限公司 | High-pressure labyrinth anti-cavitation sleeve valve |
| US20100300565A1 (en) * | 2009-05-28 | 2010-12-02 | Sekhar Samy | Short stroke control valve |
| CN101956869A (en) * | 2010-10-11 | 2011-01-26 | 无锡智能自控工程有限公司 | Communicated labyrinth valve |
| CN201844074U (en) * | 2010-10-11 | 2011-05-25 | 无锡智能自控工程有限公司 | Communicated labyrinth valve |
| CN201963895U (en) * | 2011-03-11 | 2011-09-07 | 上海华尔德电站阀门有限公司 | Labyrinth-type stop valve |
| CN204004455U (en) * | 2014-08-18 | 2014-12-10 | 浙江金锋自动化仪表有限公司 | A kind of maze-type structure for modulating valve |
| CN104295752A (en) * | 2014-10-09 | 2015-01-21 | 兰州理工大学 | Multistage step-down sleeve adjusting valve |
| CN205781331U (en) * | 2016-06-08 | 2016-12-07 | 上海发电设备成套设计研究院 | A kind of axial-flow type labyrinth regulation valve |
| CN107061861A (en) * | 2016-11-25 | 2017-08-18 | 南通龙源电站阀门有限公司 | A kind of labyrinth type antiscour regulating valve |
| CN206458841U (en) * | 2017-01-24 | 2017-09-01 | 杭州东辰热力辅机有限公司 | A kind of labyrinth disc regulating valve |
| CN107289190A (en) * | 2017-08-14 | 2017-10-24 | 上海核阀门股份有限公司 | High Pressure Difference labyrinth regulating valve |
| CN207145756U (en) * | 2017-08-14 | 2018-03-27 | 上海一核阀门股份有限公司 | High Pressure Difference labyrinth regulating valve |
| CN209725433U (en) * | 2019-03-14 | 2019-12-03 | 高特自控阀门有限公司 | A kind of labyrinth type multilevel decompression regulating valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113898754A (en) | PCV relief valve that overhauls on line | |
| CN201401518Y (en) | Wear-resistant sulfur-resistant dual-seal plate valve | |
| CN212509581U (en) | High-temperature high-pressure stop valve based on labyrinth seal | |
| CN111623130A (en) | High-temperature and high-pressure stop valve based on labyrinth seal | |
| CN102620015A (en) | Nuclear class 1 large caliber forged steel full circulation high-Cv value swing check valve | |
| CN2931995Y (en) | Valve | |
| CN104373606A (en) | Elastic stop valve and operation method thereof | |
| CN204511958U (en) | A kind of mechanical seal device | |
| CN212028548U (en) | Valve clack and antiscour stop valve | |
| CN203823116U (en) | Ceramic ball valve with high corrosion resistance and erosive wear resistance | |
| CN201293109Y (en) | Double eccentric butterfly valve plate | |
| CN206958286U (en) | A kind of plugging holes Wedge Gate Valves | |
| CN209743688U (en) | High-pressure steel check stop valve group | |
| CN201875183U (en) | Top assembling type two dimensional half ball valve of valve seat | |
| CN216279440U (en) | High-performance fireproof hard sealing butterfly valve | |
| CN218408599U (en) | Lining plastic O-shaped special-material wear-resistant ball valve | |
| CN209638413U (en) | A kind of butterfly valve of quick reparation valve plate | |
| CN217977415U (en) | Pneumatic conveying valve and valve core thereof | |
| CN219317622U (en) | Independent valve sealing structure | |
| CN219432503U (en) | High-frequency wear-resistant quick-cutting ball valve | |
| CN216643234U (en) | Quick assembly disassembly sandwich valve | |
| CN210318549U (en) | High-temperature-resistant metal sealing triple eccentric butterfly valve | |
| CN218510208U (en) | Swing type slag discharge valve with end face soft seal and spherical surface hard seal combined | |
| CN220354501U (en) | Novel three-way stop valve | |
| CN210115448U (en) | Reposition of redundant personnel awl cooling structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |