CN104373604B - A kind of self-balancing type static balancing valve - Google Patents
A kind of self-balancing type static balancing valve Download PDFInfo
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- CN104373604B CN104373604B CN201410552807.6A CN201410552807A CN104373604B CN 104373604 B CN104373604 B CN 104373604B CN 201410552807 A CN201410552807 A CN 201410552807A CN 104373604 B CN104373604 B CN 104373604B
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- sleeve
- flap
- clack
- valve clack
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- 230000003068 static effect Effects 0.000 title claims abstract description 25
- 238000007789 sealing Methods 0.000 claims abstract description 39
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 230000008676 import Effects 0.000 abstract description 5
- 239000012530 fluid Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 6
- 238000005728 strengthening Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
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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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a kind of self-balancing type static balancing valve, including valve body, valve rod, inner layer sleeve, sealing device, flap sleeve and flap, wherein, the inner layer sleeve is fixed on the valve inner, the flap sleeve is connected with the inner layer sleeve dynamic sealing, the flap is fixed on the bottom of the flap sleeve, the sealing device is arranged between the flap and the flap sleeve, cavity inside the cavity and the inner layer sleeve of the flap sleeve inner forms middle vestibule, and the import of the valve body is connected with the middle vestibule.No matter valve is in is opened or closed mode, flap sleeve and flap stress balance that whole handwheel drives, in this way, operation valve needed for torque it is unrelated with system pressure whether unrelated with valve opening, it is only necessary to overcome less frictional force just can operate freely.The self-balancing type balanced valve that the present invention is provided solves existing balanced valve operability not by force, and the situation of operating difficulties is caused because handwheel torque is excessive.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a self-balancing static balance valve.
Background
The static balance valve is also called balance valve, manual balance valve, digital locking balance valve, two-position regulating valve, etc. it changes the flow resistance of valve to regulate flow rate by changing the gap between valve core and valve seat, and its acting object is the resistance of system.
Since the object of the static balancing valve is the fluid resistance, the parts in contact with the fluid are affected by the system pressure. The traditional static balance valve has the advantages that the middle hole cavity is communicated with the water outlet, so that system pressure directly acts on the valve clack, the direct stress N of the valve clack is PS (P is the system pressure, and S is the pressure area of the valve clack), the moment M required by rotating the valve rod is in direct proportion to N and in inverse proportion to L (L is the radius of a hand wheel), and the moment required by adjusting the self-balance static balance valve is in direct proportion to the system pressure and the caliber and is increased in geometric progression. Therefore, in order to reduce the moment, the hand wheel of the traditional static balance valve is amplified according to the geometric series proportion of the caliber, but the hand wheel of the traditional static balance valve is very ineffective for the static balance valve with the large caliber, is influenced by the system pressure, and is at the expense of losing the operability, stability, attractiveness, transportation and the like of the valve. Therefore, how to provide a self-balancing static balance valve to avoid the excessive moment of adjusting the balance valve is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
In view of this, the present invention provides a self-balancing static balance valve with high operability, high stability and high practical value, so as to avoid the excessive moment of adjusting the balance valve.
The formula M ^ N, N ^ PS is deduced, and the reduction of N becomes key, but P and S are both fixed quantities, so the invention provides a self-balancing static balance valve, which enables the valve clack to be stressed in balance, and the force F ^ N-N' output outwards is approximately equal to 0, so the torque M is only influenced by friction resistance and is not influenced by system pressure.
In order to achieve the purpose, the invention provides the following technical scheme:
a self-balancing static balance valve comprises a valve body, a valve rod, an inner sleeve, a sealing device, a valve clack sleeve and a valve clack, wherein the inner sleeve is fixed inside the valve body, the valve clack sleeve is slidably arranged in the inner sleeve, the valve clack sleeve is in dynamic sealing connection with the inner sleeve, the valve clack is fixed at the bottom of the valve clack sleeve, the sealing device is arranged between the valve clack and the valve clack sleeve, the valve clack is used for adjusting the opening degree, the sealing device is used for cutting off an inlet of the valve body and an outlet of the valve body, the valve rod drives the valve clack sleeve to move up and down when rotating, a cavity inside the valve clack sleeve and a cavity inside the inner sleeve form a middle hole cavity, and the inlet of the valve body is communicated with the middle.
Preferably, the axial center of the valve clack sleeve is provided with a connecting block, the connecting block is provided with a threaded hole, the connecting block is fixedly connected with the cylinder wall of the valve clack sleeve through a first reinforcing rib, the first reinforcing rib is provided with a limiting groove, the valve rod is provided with threads and is inserted into the threaded hole, the valve body is fixedly provided with a limiting rod, and the limiting rod is inserted into the limiting groove to limit circumferential rotation of the valve clack sleeve.
Preferably, the valve rod is provided with an annular protrusion, and the annular protrusion is provided with threads.
Preferably, the first beads are uniformly arranged in plurality.
Preferably, the valve flap is an annular valve flap, and the valve flap is fixedly connected with the valve flap sleeve.
Preferably, the axle center of above-mentioned valve clack is provided with the stopper, the stopper pass through the second strengthening rib with the lateral wall fixed connection of valve clack, the stopper with the distance restriction valve of opening height between the valve rod bottom.
Preferably, the sealing device is a first sealing ring, a first groove is formed in the bottom of the valve clack sleeve, the first sealing ring is arranged in the first groove, the valve clack and the valve clack sleeve are connected into a whole to form a valve clack assembly, and the valve clack fixes the first sealing ring.
Preferably, a second groove is formed in the outer wall of the valve clack sleeve, a second sealing ring is arranged in the second groove, and the second sealing ring is arranged at the matching position of the valve clack sleeve and the inner layer sleeve.
The invention provides a self-balancing static balance valve which comprises a valve body, a valve rod, an inner layer sleeve, a sealing device, a valve clack sleeve and a valve clack, wherein the inner layer sleeve is fixed inside the valve body, the valve clack sleeve is slidably arranged in the inner layer sleeve, the valve clack sleeve is in dynamic sealing connection with the inner layer sleeve, the valve clack is fixed at the bottom of the valve clack sleeve, the sealing device is arranged between the valve clack and the valve clack sleeve, the valve clack is used for adjusting the opening degree, the sealing device is used for cutting off an inlet of the valve body and an outlet of the valve body, the valve rod drives the valve clack sleeve to move up and down when rotating, a cavity inside the valve clack sleeve and a cavity inside the inner layer sleeve form a middle hole cavity, and the inlet of the. When the valve is used, the valve rod is rotated to drive the valve clack sleeve to move up and down, when the valve clack sleeve moves upwards, the inlet is communicated with the outlet, and when the valve clack sleeve moves downwards, the inlet and the outlet are cut off by the sealing device, and the valve clack adjusts the opening degree of the valve clack. Because the inlet of the valve body is communicated with the middle hole cavity, the valve clack can not be influenced by the pressure of fluid no matter how large or small the pressure of the fluid in the system at any time, the moment when the valve clack is opened and closed is prevented from being influenced by the pressure of the fluid, the moment when the valve clack is adjusted is prevented from being overlarge, and meanwhile, the valve clack sleeve is in dynamic sealing connection with the inner layer sleeve, so that the stress of the valve clack is balanced, and the valve clack is opened and closed more stably. No matter the valve is in the opening or closing state, the valve clack sleeve and the valve clack driven by the whole hand wheel mechanism are stressed in balance, so that the torque required for operating the valve is irrelevant to the system pressure and whether the valve is opened or not, and the valve can be operated freely by overcoming smaller friction force. The self-balancing balance valve provided by the invention solves the problems that the existing balance valve is not strong in operability and is difficult to operate due to overlarge hand wheel moment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a self-balancing static balance valve according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a valve flap sleeve according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a valve flap according to an embodiment of the present invention.
In the above FIGS. 1-3:
valve clack sleeve 1, second recess 11, connecting block 12, first strengthening rib 13, spacing groove 14, first recess 15, inlayer sleeve 2, valve clack 3, stopper 31, second strengthening rib 32, gag lever post 4, valve rod 5, valve body 6, import 7, export 8, slope 9.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, fig. 1 is a schematic structural diagram of a self-balancing static balance valve according to an embodiment of the present invention; FIG. 2 is a schematic structural diagram of a valve flap sleeve according to an embodiment of the present invention; fig. 3 is a schematic structural diagram of a valve flap according to an embodiment of the present invention.
The embodiment of the invention provides a self-balancing static balance valve, which comprises a valve body 6, a valve rod 5, an inner layer sleeve 2, a valve clack sleeve 1 and a valve clack 3, wherein one end of the valve body 6 is provided with an inlet 7, the other end of the valve body is provided with an outlet 8, the inner layer sleeve 2 is fixed in the valve body 6, the valve clack sleeve 1 is slidably arranged in the inner layer sleeve 2, the valve clack sleeve 1 is in movable sealing connection with the inner layer sleeve 2, the valve clack 3 is fixed at the bottom of the valve clack sleeve 1, a sealing device is arranged between the valve clack 3 and the valve clack sleeve 1, the valve clack 3 is used for adjusting the opening degree, the sealing device is used for cutting off the inlet 7 of the valve body 6 and the outlet 8 of the valve body 6, the valve rod 5 drives the valve clack sleeve 1 to move up and down when the, in the process that valve clack sleeve 1 reciprocated, valve clack 3 governing valve opening, the cavity of valve clack sleeve 1 inside and the cavity of inlayer sleeve 2 inside form variable volume well vestibule, when valve clack sleeve 1 and inlayer sleeve 2 relative motion, the volume of well vestibule changes, import 7 and well vestibule intercommunication, consequently valve clack 3 can not receive fluidic pressure no matter how big or how little fluid pressure is in the system at any time, moment when having avoided opening and closing receives fluid pressure's influence, valve clack 3 open atress, water pressure balance from top to bottom, avoid adjusting the moment of balanced valve too big, simultaneously, sleeve valve clack 1 and inlayer sleeve 2 dynamic seal are connected, can make valve clack 3 atress balanced, it is more stable to open and close. The self-balancing balance valve provided by the embodiment of the invention solves the problems that the existing balance valve is poor in operability and is difficult to operate due to overlarge hand wheel moment.
Wherein, the valve body 6 can be a T-shaped structure valve body or a Y-shaped structure valve body.
In order to further optimize the above scheme, the axial center of the valve clack sleeve 1 is provided with a connecting block 12, a threaded hole is formed in the connecting block 12, the connecting block 12 is fixedly connected with the cylinder wall of the valve clack sleeve 1 through a first reinforcing rib 13, a limiting groove 14 is formed in the first reinforcing rib 13, a thread is formed in the valve rod 5 and inserted into the threaded hole, a limiting rod 4 is fixed on the valve body 6, and the limiting rod 4 is inserted into the limiting groove 14 to limit the circumferential rotation of the valve clack sleeve 1. Adopt first strengthening rib 13 to be connected connecting block 12 and valve clack sleeve 1, very big intercommunication area is reserved with the intercommunication of inlayer sleeve 2 to realization valve clack sleeve 1 that can be fine to can not receive valve rod 5's influence, valve rod 5 rotates the drive connecting block and drives valve clack sleeve 1 and reciprocate simple structure.
In order to further optimize the scheme, the valve rod 5 is provided with the annular protruding portion, the annular protruding portion is provided with the threads, the valve rod 5 cannot influence the strength of the valve rod 5 due to the threads, and the driving efficiency is improved.
In order to further optimize the scheme, the four first reinforcing ribs 13 are uniformly arranged, so that the connection strength is improved, and the valve clack sleeve 1 moves more stably.
In order to further optimize the above scheme, valve clack 3 is annular valve clack, and valve clack 3 and valve clack sleeve 1 fixed connection, it is concrete can be through threaded connection, also can set up the bolt and connect, because valve clack 3 need cut off import 7 and export 8, and there is friction valve clack 3 and import 7 and export 8's intercommunication position, when valve clack 3 long-time use appears wearing and tearing, the change of being convenient for has also reduced cost of maintenance simultaneously. The valve clack 3 is not sealed up and down, fluid is allowed to pass through, fluid entering from an inlet acts on the lower portion of the valve clack 3, meanwhile, the fluid penetrates through the inner portion of the valve clack 3, the middle hole cavity is fully squeezed, and meanwhile, the fluid acts on the upper portion of the valve clack 3, and balance of the valve clack 3 is achieved.
In order to further optimize the above scheme, the axis of the valve flap 3 is provided with a limit block 31, the limit block 31 is fixedly connected with the side wall of the valve flap 3 through a second reinforcing rib 32, and the limit block 31 is matched with the bottom of the valve rod 5 or the bottom of the limit rod 4 for use, that is, the opening height of the valve is limited by controlling the distance between the limit block 31 and the bottom of the valve rod 5, or the opening height of the valve is limited by controlling the distance between the limit block 31 and the bottom of the limit rod 4. When valve rod 5 rotates and makes valve clack 3 rebound, when stopper 31 withstood the bottom of valve rod 5 or the bottom of gag lever post 4, the aperture just reached the biggest, so the aperture of valve just can realize adjustable setting, and, when adopting gag lever post 4 and stopper 31 cooperation to use, the degree of depth of gag lever post 4 can be adjusted, so the distance between valve clack 3 and the valve rod 5 can be adjusted through gag lever post 4, just so can restrict opening height of valve clack 3, it is more convenient to adjust.
In order to further optimize the above scheme, sealing device is first sealing washer, the bottom of valve clack sleeve 1 is provided with first recess 15, be provided with first sealing washer in the first recess 15, valve clack 3 and valve clack sleeve 1 are connected and are constituteed the valve clack assembly as an organic whole, valve clack 3 fixes first sealing washer on valve clack sleeve 1, valve clack 3 and valve clack sleeve 1's sealing connection has been realized, and, first sealing washer can seal the space between valve clack sleeve 1 and the valve body 6, thoroughly cut off 7 and 8 exports of importing, avoid the fluid to reveal.
In order to further optimize the above scheme, a second groove 11 is formed in the outer wall of the valve clack sleeve 1, a second sealing ring is arranged in the second groove 11, and the second sealing ring is arranged at the matching position of the valve clack sleeve 1 and the inner layer sleeve 2, so that the dynamic sealing connection between the inner layer sleeve 2 and the valve clack sleeve 1 is realized.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A self-balancing static balance valve is characterized by comprising a valve body, a valve rod, an inner layer sleeve, a sealing device, a valve clack sleeve and a valve clack, wherein,
the inner layer sleeve is fixed in the valve body, the valve clack sleeve is connected with the inner layer sleeve in a dynamic sealing way,
the valve clack is fixed at the bottom of the valve clack sleeve, the sealing device is arranged between the valve clack and the valve clack sleeve,
the cavity in the valve clack sleeve and the cavity in the inner layer sleeve form a middle hole cavity,
the inlet of the valve body is communicated with the middle hole cavity,
the axial center of the valve clack sleeve is provided with a connecting block, a threaded hole is arranged on the connecting block, the connecting block is fixedly connected with the cylinder wall of the valve clack sleeve through a first reinforcing rib, a limiting groove is arranged on the first reinforcing rib,
the valve rod is provided with threads and is inserted in the threaded hole,
a limiting rod is fixed on the valve body and inserted in the limiting groove to limit the circumferential rotation of the valve clack sleeve,
the axis of the valve clack is provided with a limiting block which is fixedly connected with the side wall of the valve clack through a second reinforcing rib,
the distance between the limiting block and the bottom of the valve rod limits the opening height of the valve,
or,
the opening height of the valve is limited by controlling the distance between the limiting block and the bottom of the limiting rod.
2. The self-balancing static balance valve of claim 1, wherein the valve stem is provided with an annular projection, the annular projection being provided with threads.
3. The self-balancing static balance valve of claim 1, wherein the first reinforcing ribs are provided in plurality and uniformly.
4. The self-balancing static balance valve of claim 1, wherein the valve flap is an annular valve flap, and the valve flap is fixedly connected to the valve flap sleeve.
5. The self-balancing static balance valve of claim 1, wherein the sealing device is a first sealing ring, a first groove is disposed at the bottom of the valve flap sleeve, the first sealing ring is disposed in the first groove, the valve flap and the valve flap sleeve are connected together to form a valve flap assembly, and the valve flap fixes the first sealing ring.
6. The self-balancing static balance valve of claim 1, wherein the outer wall of the valve flap sleeve is provided with a second groove, and a second sealing ring is arranged in the second groove and is arranged at the matching position of the valve flap sleeve and the inner layer sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410552807.6A CN104373604B (en) | 2014-10-17 | 2014-10-17 | A kind of self-balancing type static balancing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410552807.6A CN104373604B (en) | 2014-10-17 | 2014-10-17 | A kind of self-balancing type static balancing valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104373604A CN104373604A (en) | 2015-02-25 |
| CN104373604B true CN104373604B (en) | 2017-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410552807.6A Active CN104373604B (en) | 2014-10-17 | 2014-10-17 | A kind of self-balancing type static balancing valve |
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| CN (1) | CN104373604B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4834133A (en) * | 1988-09-28 | 1989-05-30 | Westinghouse Electric Corp. | Control valve |
| US5492150A (en) * | 1993-08-13 | 1996-02-20 | Nuovopignone-Industrie Meccaniche E Fonderia S.P.A. | Combination control valve, particularly suitable for thermoelectric power plant |
| CN201547262U (en) * | 2009-11-05 | 2010-08-11 | 承德高中压阀门管件集团有限公司 | Angle type balancing valve |
| CN202209459U (en) * | 2011-08-23 | 2012-05-02 | 台州双林阀门制造有限公司 | Static balance valve |
| CN102913632A (en) * | 2012-10-16 | 2013-02-06 | 承德高中压阀门管件集团有限公司 | Balance valve with separated valve body and valve seat |
| CN203488748U (en) * | 2013-09-26 | 2014-03-19 | 卓旦春 | Static balance valve with ultra large caliber |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101922576B (en) * | 2010-09-19 | 2013-01-30 | 卓旦春 | Static balancing valve |
-
2014
- 2014-10-17 CN CN201410552807.6A patent/CN104373604B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4834133A (en) * | 1988-09-28 | 1989-05-30 | Westinghouse Electric Corp. | Control valve |
| US5492150A (en) * | 1993-08-13 | 1996-02-20 | Nuovopignone-Industrie Meccaniche E Fonderia S.P.A. | Combination control valve, particularly suitable for thermoelectric power plant |
| CN201547262U (en) * | 2009-11-05 | 2010-08-11 | 承德高中压阀门管件集团有限公司 | Angle type balancing valve |
| CN202209459U (en) * | 2011-08-23 | 2012-05-02 | 台州双林阀门制造有限公司 | Static balance valve |
| CN102913632A (en) * | 2012-10-16 | 2013-02-06 | 承德高中压阀门管件集团有限公司 | Balance valve with separated valve body and valve seat |
| CN203488748U (en) * | 2013-09-26 | 2014-03-19 | 卓旦春 | Static balance valve with ultra large caliber |
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| Publication number | Publication date |
|---|---|
| CN104373604A (en) | 2015-02-25 |
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Address after: 315800 No. 536, West Hill Road, Ningbo, Zhejiang Applicant after: Watts water equipment manufacturing (Ningbo) Co., Ltd. Address before: 315800 No. 536, West Hill Road, Ningbo, Zhejiang Applicant before: Watts Valve (Ningbo) Co., Ltd. |
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