CN101769387B - Reversing valve with flow guide structure - Google Patents
Reversing valve with flow guide structure Download PDFInfo
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- CN101769387B CN101769387B CN2009101895107A CN200910189510A CN101769387B CN 101769387 B CN101769387 B CN 101769387B CN 2009101895107 A CN2009101895107 A CN 2009101895107A CN 200910189510 A CN200910189510 A CN 200910189510A CN 101769387 B CN101769387 B CN 101769387B
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- stopping plate
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- guide structure
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Abstract
The invention relates to a reversing valve with a flow guide structure, which comprises a valve body, valve blades and two flow baffle plate groups, wherein the valve body is provided with an inlet and two outlets, the valve blades are arranged in a valve cavity of the valve body and are matched with the two outlets, the two flow baffle plate groups are arranged in the valve cavity, the first group of flow baffle plates comprises first movable flow baffle plates, the first movable flow baffle plates are rotatably arranged in the valve cavity and are positioned at the inlet and on the cavity wall near the first outlet side, the second group of flow baffle plates comprises second movable flow baffle plates, the second movable flow baffle plates are rotatably arranged in the valve cavity and are positioned at the inlet and on the cavity wall near the second outlet side, and when the valve blades are matched with one outlet in a sealed way, the flow baffle plate group corresponding to the outlet forms a temporary flow baffle cavity wall in the valve cavity. Through the arrangement of the two flow baffle plate groups in the valve cavity near the inlet, when the valve blades are matched with one outlet in the sealed way, the movable baffle plates on the side wall near the outlet side are rotated to the other outlet for forming the temporary flow baffle cavity wall in the valve cavity, so the revolution of the fluid after directly impacting on the valve blades in the valve cavity is avoided, and the flow pressure loss in the valve cavity is reduced.
Description
[technical field]
The present invention relates to a kind of selector valve, more particularly, relate to a kind of selector valve with flow guide structure.
[background technique]
Selector valve is a valve commonly used in a kind of industry equipment, is generally used for the flow direction of fluids such as gas, liquid is controlled.Common selector valve comprises valve body and the flap that is arranged in the valve body valve pocket, and flap matches with the outlet of valve body and realizes the switching of outlet, and the motion mode of flap is divided into rise-fall type and rotary again.As shown in Figure 1, for the selector valve of rotary flap, with the three-way diverter valve is example, the valve pocket of valve body comprises an inlet and two outlets, flap winds the rotational perpendicular to two outlet planes, place, usually at this axis place valve rod is set, flap is fixedly installed on the valve rod, rotates in valve pocket by driving flap from the external drive valve rod.When flap cooperates with first exit seal, the inlet and the second outlet conducting; When need switching outlet, actuate valve stem drives that flap turns to second outlet port and when being sealed and matched with it, and the inlet and the first outlet conducting realize that outlet switches.
But fluid directly impacts sometimes and flows out from outlet after turning over an angle on the flap more again when the inlet of valve body enters in the valve pocket, causes mobile local pressure loss.Local pressure loss mainly is because long-pending the variation suddenly of fluid flow direction generation flip-flop or cross section of fluid channel forms, and local resistance more with valve pocket in structure, as valve pocket shape, flap shape etc. very big relation is arranged.For industries such as chemical industry, grow in the Distance Transmission process at fluid, the maximum pressure loss just is to be arranged on the local pressure loss that each local valve body brings, thereby the pressure when having to strengthen the fluid transmission also is provided with multistage compression pump in the centre and remedies the pressure loss, makes the cost of fluid transmission increase.On the other hand,, further require ducted various element to need withstand voltage characteristic, and the sealing in the joint also needs to bear certain pressure, thereby further increased the cost of pipe-line construction along with pressure increases.
[summary of the invention]
The technical problem to be solved in the present invention is that the defective at the bigger local pressure loss of the existence of the structure convection cell in the valve pocket in the selector valve in the prior art provides a kind of selector valve with flow guide structure, can reduce the local pressure loss of valve inner.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of selector valve with flow guide structure, the flap that comprises valve bodies and be arranged in the valve pocket of valve body and be complementary with two outlets with an import and two outlets, also comprise two groups of flow-stopping plate groups that are arranged in the valve pocket, first group of flow-stopping plate group comprises that rotation is arranged on the first moving flow-stopping plate that is positioned in the valve pocket on inlet and the close chamber wall of first outlet side; Second group of flow-stopping plate group comprises that rotation is arranged on the second moving flow-stopping plate that is positioned in the valve pocket on inlet and the close chamber wall of second outlet side; When flap was sealed and matched outlet therein, the flow-stopping plate group corresponding with this outlet formed interim baffle chamber wall in valve pocket.
In the selector valve with flow guide structure of the present invention, described first group of flow-stopping plate group also comprise be arranged on be provided with on the secondary sealing area that matches with second outlet on the flap and match with the described first moving flow-stopping plate first decide flow-stopping plate; Described second group of flow-stopping plate group also be included on the flap be provided with on the primary sealing area that matches with first outlet and match with the described second moving flow-stopping plate second decide flow-stopping plate.Match and form interim baffle chamber wall by moving flow-stopping plate on moving flow-stopping plate and the flap is set in every group of flow-stopping plate group, make that the transition between the valve pocket chamber wall in interim baffle chamber wall and outlet port is more smooth, further reduced the flowing pressure loss in the valve pocket.
In the selector valve with flow guide structure of the present invention, in every group of described flow-stopping plate group to decide the interim baffle chamber wall that flow-stopping plate and moving flow-stopping plate form be the smooth transition curved surface.
In the selector valve with flow guide structure of the present invention, described shape of deciding flow-stopping plate and moving flow-stopping plate and chamber internal chamber wall is complementary; Convenient moving flow-stopping plate and the rotation of moving flow-stopping plate in valve pocket.
In the selector valve with flow guide structure of the present invention, on the same group decide flow-stopping plate and moving flow-stopping plate is complementary in the shape of seam crossing; Make that the transition decide interim baffle chamber wall that forms between flow-stopping plate and the moving flow-stopping plate is more continuous, further reduced the interior flowing pressure loss of valve pocket.
In the selector valve with flow guide structure of the present invention, described moving flow-stopping plate is set to the crescent shape of indent at the profile of seam crossing, describedly decides flow-stopping plate was set to and moved the evagination that flow-stopping plate is complementary at the profile of seam crossing arc.
In the selector valve with flow guide structure of the present invention, the rotatingshaft of described moving flow-stopping plate and the rotatingshaft of flap are arranged in parallel.
In the selector valve with flow guide structure of the present invention, moving flow-stopping plate in described two groups of flow-stopping plate groups and flap are by the drive unit coordinated drive that is arranged on the outer or valve body of valve body.
In the selector valve with flow guide structure of the present invention, two described decides the flow-stopping plate integrated setting on two sealing surfaces of flap.
In the selector valve with flow guide structure of the present invention, the central axis of an outlet in described and the central axes of described import; During in the outlet port of often opening, fluid is straight-through to flow through valve body at selector valve, makes flowing pressure loss minimum in the valve body.
In process fluid flow, no matter liquid or gas, when the fluid vertical impact was on a planomural, the kinetic energy of fluid was converted into the pressure energy, causes flowing pressure loss.Hydrodynamics Theory and practice show, straight passage and the small angle passage of turning back is compared, the energy loss minimum that flows, and its energy loss form is a linear loss, and the small angle passage of turning back had both comprised linear loss, also comprised local losses.But the passage of turning back will be much smaller than 90 ° of passages of turning back.Implement the selector valve with flow guide structure of the present invention, has following beneficial effect: by in valve pocket, two groups of flow-stopping plate groups being set near inlet, at least comprise a moving flow-stopping plate in every group of flow-stopping plate group, when flap cooperates with an exit seal, turn to another outlet port near the moving flow-stopping plate on the chamber wall of this outlet side, in valve pocket, form interim baffle chamber wall, avoided fluid in valve pocket, directly to impact revolution again on the flap, thereby reduced the flowing pressure loss in the valve pocket.
The invention will be further described below in conjunction with drawings and Examples.
[description of drawings]
Fig. 1 a is the plan view with selector valve preferred embodiment of flow guide structure of the present invention;
Fig. 1 b is the stereogram with selector valve preferred embodiment of flow guide structure of the present invention;
Fig. 1 c is the sectional view with selector valve preferred embodiment of flow guide structure of the present invention;
Fig. 2 a is the stereogram of front valve shell in the selector valve preferred embodiment with flow guide structure of the present invention;
Fig. 2 b is the plan view of front valve shell in the selector valve preferred embodiment with flow guide structure of the present invention;
Fig. 2 c is the sectional view of front valve shell in the selector valve preferred embodiment with flow guide structure of the present invention;
Fig. 3 a is the stereogram of rear valve body in the selector valve preferred embodiment with flow guide structure of the present invention;
Fig. 3 b is the plan view of rear valve body in the selector valve preferred embodiment with flow guide structure of the present invention;
Fig. 3 c is the stereogram of rear valve body other direction in the selector valve preferred embodiment with flow guide structure of the present invention;
Fig. 4 a is the stereogram of the first moving flow-stopping plate in the selector valve preferred embodiment with flow guide structure of the present invention;
Fig. 4 b is the plan view of the first moving flow-stopping plate in the selector valve preferred embodiment with flow guide structure of the present invention;
Fig. 4 c is the right elevation of the first moving flow-stopping plate in the selector valve preferred embodiment with flow guide structure of the present invention;
Fig. 5 is the stereogram of valve rod in the selector valve preferred embodiment with flow guide structure of the present invention;
Fig. 6 a is the stereogram of flap in the selector valve preferred embodiment with flow guide structure of the present invention;
Fig. 6 b is the stereogram of flap other direction in the selector valve preferred embodiment with flow guide structure of the present invention;
Fig. 7 is the structural representation when flap cooperates with second exit seal in the selector valve preferred embodiment with flow guide structure of the present invention;
Fig. 8 is the structural representation when flap cooperates with first exit seal among another embodiment of selector valve with flow guide structure of the present invention;
Fig. 9 is the structural representation when flap cooperates with second exit seal among another embodiment of selector valve with flow guide structure of the present invention.
[embodiment]
Shown in Fig. 1 a, 1b, 1c, in the preferred embodiment of the selector valve with flow guide structure of the present invention, comprise valve body 10 and be arranged on flap 20, the first flow-stopping plate group and the second flow-stopping plate group in the valve body 10.Valve body 10 comprises that two outlets and import 11, two outlets are respectively first outlet, 12 and second outlet 13.Flap 20 is rotatable in valve body 10, can be sealed and matched by the primary sealing area 21a and first outlet 12, is sealed and matched by the secondary sealing area 22a and second outlet 13.First outlet 12 the central shaft of valve body 10 and the central axes of import 11 preferably are set, preferably be set to overlap, when the secondary sealing area 22a of flap 20 matches with second outlet 13, fluid leads directly to by import 11 and flows to first outlet 12, can not transfer in valve body 10 inside, the flowing pressure loss minimum of valve body 10 can be provided with this outlet and be normally open at this moment.The central shaft of valve body second outlet 13 and the center axle clamp of import 11 are angled, and this outlet can be set to normally off.Like this, under normal circumstances, fluid is straight-throughly by valve body 10; Only when needs commutated, fluid just turned over several angle ground by valve body 10.
Shown in Fig. 1 a, 1b, 1c, preferably have front valve shell 50 and rear valve body 60 combines, with convenient with flap 20 and, flow-stopping plate is installed in the valve pocket.Shown in Fig. 2 a, 2b, 2c, front valve shell 50 is provided with import 11, preceding connection mouth 51.Import 11 preferably is set to circle, preceding connection mouth 51 preferably is set to ellipse, the ellipse of connection mouth 51 before whole front valve shell 50 inner valve pockets progressively are expanded to from the import 11 of circle, the transition of valve cavity wall line smoothing.Preceding connection mouth 51 places of front valve shell 50 are provided with flange 52, in order to be connected with rear valve body 60.
Shown in Fig. 3 a, 3b, 3c, rear valve body 60 is provided with back connection mouth 61, first outlet, 12 and second outlet 13.Back connection mouth 61 is set to the shape that is complementary with preceding connection mouth 51, be preferably ellipse, two outlets preferably are set to circle, and the inside valve pocket of whole rear valve body 60 progressively is expanded to oval-shaped back connection mouth 61 from the outlet port of two circles respectively, and intersects at connection mouth 61 places, back.Back connection mouth 61 places of rear valve body 60 are provided with flange 62, in order to be connected with front valve shell 50.
Front and back valve body 60 is fixed together by flange, and at this moment, the central shaft of first outlet 12 parallels with the central shaft of import 11, is preferably coincidence.Then first outlet 12 forms straight-through fluid passage with import 11, and fluid is less from the flowing pressure loss of import 11 to first outlets 12, and this passage can often be made as and open.Second outlet 13 is intersected with import 11, and fluid exists flowing pressure loss bigger from import 11 to second outlets 13, and this passage can be made as normally closed.
Shown in Fig. 6 a, 6b, flap 20 comprises that two seal discs that be arranged in parallel, 21,22, two seal discs 21,22 are fixed together by the connecting rod 23 of centre.Being respectively equipped with on two seal discs and exporting the sealing surface that matches, is primary sealing area 21a with first outlet, 12 sealing surfaces that match wherein, is secondary sealing area 22a with second outlet, 13 sealing surfaces that match.Offer attachment hole 24 on the connecting rod, the axis of this attachment hole 24 and the axis of connecting rod are perpendicular, and it is parallel with seal disc that the axis of this attachment hole 24 preferably is set.The bar head 72 of the size of attachment hole 24 and valve rod 70 is complementary, and makes the bar head 72 of valve rod 70 just in time can insert in the attachment hole 24.The two ends of attachment hole 24 also are provided with retaining ring 25 (seeing Fig. 1 c), and this retaining ring 25 and attachment hole 24 screw-thread fit can be set.After the bar head 72 of valve rod 70 inserts in the attachment hole 24, utilize retaining ring 25 that bar head 72 is fixed in the attachment hole 24 again, thereby valve rod 70 and flap 20 are coupled together.
In this preferred embodiment, the first flow-stopping plate group comprises that first moving flow-stopping plate 31, the second flow-stopping plate groups comprise the second moving flow-stopping plate 41; The first moving flow-stopping plate 31 and the second moving flow-stopping plate 41 rotate and are arranged in the valve pocket, specifically can be arranged in the valve pocket of front valve shell 50.Shown in Fig. 4 a, 4b, 4c, the first moving flow-stopping plate 31 is made of damper shaft 33 and baffle plate 34, damper shaft 33 is rotatably assorted with valve body, baffle plate 34 is set to the shape that the valve pocket chamber wall with front valve shell 50 is complementary, preferably be set to the part of cylndrical surface, this baffle plate 34 can form a cylindrical cavity that is complementary with import 11 sizes with the chamber wall at close second outlet 13 places in front valve shell 50 valve pockets, promptly forms interim baffle chamber wall in valve pocket.Be set to circular arc line near 34 33 profile line 34a on one side of baffle plate on the baffle plate 34, make that this circular arc line 34a just in time matched with import 11 when flow-stopping plate turned to the interim baffle of formation chamber wall in valve pocket.The second moving flow-stopping plate 41 is set to the structural type identical with the first moving flow-stopping plate 31, comprise 34 33 on baffle plate and baffle plate 34 equally, its baffle plate 34 forms a cylindrical cavity that is complementary with import 11 sizes with the interior chamber wall near first outlet, 12 places of front valve shell 50 valve pockets, promptly forms interim baffle chamber wall in valve pocket.34 33 on the baffle plate that the first moving flow-stopping plate 31 and the second moving flow-stopping plate 41 preferably are set is parallel to each other, and is preferably all parallel with the center of rotation of valve rod 70.
As shown in Figure 7, when fluid need be from import 11 when valve pocket to the first exports 12, rotation valve rod 70, make the secondary sealing area 22a and second outlet 13 of flap 20 be sealed and matched, rotate the second moving flow-stopping plate 41 this moment, make the second moving flow-stopping plate 41 concordant, form interim baffle chamber wall with first outlet 12 in the rear valve body 60, thereby avoid fluid turnover downwards to impact on the flap 20 that is positioned at second outlet 13, and then reduce flowing pressure loss.Shown in Fig. 1 c, when fluid need be from import 11 when valve pocket to the second exports 13, counter-rotating valve rod 70, make the primary sealing area 21a and first outlet 12 of flap 20 be sealed and matched, rotate the first moving flow-stopping plate 31 this moment again, make the moving flow-stopping plate 31 of winning concordant, form interim baffle chamber wall with second outlet 13 in the rear valve body 60, thereby avoid fluid impact to the flap 20 that is positioned at first outlet 12, and then reduce flowing pressure loss.
Shown in Fig. 8,9, in another embodiment of the selector valve with flow guide structure of the present invention, with above preferred embodiment comparatively speaking, comprise also in the first flow-stopping plate group that first decides to comprise that also second decides flow-stopping plate 42 in flow-stopping plate 32, the second flow-stopping plate groups.Wherein first decides on the secondary sealing area 22a that flow-stopping plate 32 is fixedly installed on flap 20, and second decides on the primary sealing area 21a that flow-stopping plate 42 is fixedly installed on flap 20.
In the present embodiment, when fluid need be from import 11 when valve pocket to the first exports 12, as shown in Figure 9, rotation valve rod 70, make the secondary sealing area 22a and second outlet 13 of flap 20 be sealed and matched, on the primary sealing area 21a second decides flow-stopping plate 42 and turns in the middle of the valve pocket with flap 20, and second to decide flow-stopping plate 42 concordant with the chamber wall of first outlet 12 of rear valve body 60, and first decide flow-stopping plate 32 turns to second with flap 20 and export outside 13; Rotate the second moving flow-stopping plate 41 again, make the second moving flow-stopping plate 41 concordant with first outlet 12 in the rear valve body 60, and with second decide the common interim baffle chamber walls that form of flow-stopping plate 42, this interim baffle chamber wall shelters from the cavity of second outlet, 13 directions fully, make fluid directly flow to first outlet 12 along interim baffle chamber wall from import 11, avoid fluid turnover downwards to impact on the flap 20 that is positioned at second outlet 13, and then reduce flowing pressure loss.
When fluid need as shown in Figure 8, move the wall place, valve pocket chamber that front valve shell 50 was return and be close to flow-stopping plate 41 with second earlier from import 11 when valve pocket to the second exports 13; Counter-rotating valve rod 70, make the primary sealing area 21a and first outlet 12 of flap 20 be sealed and matched, on the secondary sealing area 22a first decides flow-stopping plate 32 and turns to the valve pocket neutral position with flap 20, first to decide second outlet, the 13 chamber walls of flow-stopping plate 32 and rear valve body 60 concordant, and second decide flow-stopping plate 42 turns to first with flap 20 and export outside 12; Rotate the first moving flow-stopping plate 31 again, make the moving flow-stopping plate 31 of winning concordant with second outlet 13 in the rear valve body 60, and with first decide the common interim baffle chamber walls that form of flow-stopping plate 32, this interim baffle chamber wall shelters from the cavity of first outlet, 12 directions fully, make fluid directly flow to second outlet 13 along interim baffle chamber wall from import 11, avoid fluid impact to the flap 20 that is positioned at first outlet 12, and then reduce flowing pressure loss.
In the present embodiment, the interim baffle chamber wall of deciding flow-stopping plate and the formation of moving flow-stopping plate that preferably is provided with in every group is the smooth transition curve form, and the baffle plate 34 of promptly deciding flow-stopping plate and moving flow-stopping plate is complementary and forms continuous smooth transition curved surface.And preferably be provided with and decide flow-stopping plate and moving flow-stopping plate and be complementary in the shape of the seam crossing that forms interim baffle chamber wall, can be provided with specifically that to decide flow-stopping plate be the crescent shape of indent at the profile 34b of seam crossing, moving flow-stopping plate is at the profile 44b of the seam crossing arc for the evagination that is complementary with crescent shape, make both the seam when forming interim baffle chamber wall overlap, do not have the space.
In the present embodiment, also can will decide the flow-stopping plate integrated setting on the sealing surface of flap 20, to avoid installing trouble.Particularly, can directly the baffle plate 34 of deciding flow-stopping plate directly be welded on the sealing surface of flap 20.
In above preferred embodiment, the rotation of flap 20, the first moving flow-stopping plate 31, the second moving flow-stopping plate 41 all drives by drive unit.Be preferably in outside the valve body or on the valve body control gear is set, come accessory drive, to coordinate the rotation sequential between flap 20, first moving flow-stopping plate 31, the second moving flow-stopping plate 41 by control gear.
The above embodiment has only expressed several mode of execution of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. selector valve with flow guide structure, the flap that comprises valve bodies and be arranged in the valve pocket of valve body and be complementary with two outlets with an import and two outlets, it is characterized in that, also comprise two groups of flow-stopping plate groups that are arranged in the valve pocket, first group of flow-stopping plate group comprises that rotation is arranged on the first moving flow-stopping plate that is positioned in the valve pocket on inlet and the close chamber wall of first outlet side; Second group of flow-stopping plate group comprises that rotation is arranged on the second moving flow-stopping plate that is positioned in the valve pocket on inlet and the close chamber wall of second outlet side; When flap was sealed and matched outlet therein, the flow-stopping plate group corresponding with this outlet formed interim baffle chamber wall in valve pocket.
2. according to the described selector valve of claim 1 with flow guide structure, it is characterized in that, described first group of flow-stopping plate group also comprise be arranged on the flap be provided with on the secondary sealing area that matches with second outlet and match with the described first moving flow-stopping plate first decide flow-stopping plate; Described second group of flow-stopping plate group also be included on the flap be provided with on the primary sealing area that matches with first outlet and match with the described second moving flow-stopping plate second decide flow-stopping plate.
3. according to the described selector valve of claim 2, it is characterized in that with flow guide structure, in every group of described flow-stopping plate group to decide the interim baffle chamber wall that flow-stopping plate and moving flow-stopping plate form be the smooth transition curved surface.
4. according to the described selector valve of claim 3, it is characterized in that described shape of deciding flow-stopping plate and moving flow-stopping plate and chamber internal chamber wall is complementary with flow guide structure.
5. according to the described selector valve of claim 3, it is characterized in that with flow guide structure, on the same group decide flow-stopping plate and moving flow-stopping plate is complementary in the shape of seam crossing.
6. according to the described selector valve of claim 5, it is characterized in that described moving flow-stopping plate is set to the crescent shape of indent at the profile of seam crossing, describedly decide flow-stopping plate was set to and moved the evagination that flow-stopping plate is complementary at the profile of seam crossing arc with flow guide structure.
7. according to each described selector valve in the claim 1 to 6, it is characterized in that the rotatingshaft of described moving flow-stopping plate and the rotatingshaft of flap are arranged in parallel with flow guide structure.
8. according to each described selector valve in the claim 1 to 6, it is characterized in that moving flow-stopping plate in described two groups of flow-stopping plate groups and flap are by being arranged on outside the valve body or the drive unit coordinated drive on the valve body with flow guide structure.
9. according to the described selector valve of claim 2, it is characterized in that two described decides the flow-stopping plate integrated setting on two sealing surfaces of flap with flow guide structure.
10. according to the described selector valve of claim 1, it is characterized in that the central axis of an outlet in described and the central axes of described import with flow guide structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101895107A CN101769387B (en) | 2009-11-23 | 2009-11-23 | Reversing valve with flow guide structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101895107A CN101769387B (en) | 2009-11-23 | 2009-11-23 | Reversing valve with flow guide structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101769387A CN101769387A (en) | 2010-07-07 |
| CN101769387B true CN101769387B (en) | 2011-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101895107A Expired - Fee Related CN101769387B (en) | 2009-11-23 | 2009-11-23 | Reversing valve with flow guide structure |
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| Country | Link |
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| CN (1) | CN101769387B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3236121B1 (en) * | 2016-04-21 | 2020-09-16 | Leser GmbH & Co. KG | Shuttle valve for a safety valve apparatus and safety valve apparatus |
| CN108895168B (en) * | 2018-08-13 | 2023-10-03 | 四川大学 | Lower end sealing structure of pressure maintaining cylinder |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3116756A (en) * | 1962-01-26 | 1964-01-07 | Gen Electric | Diverter valve means |
| US4718457A (en) * | 1986-06-20 | 1988-01-12 | Luger G William | Diverter valve |
| CN2122988U (en) * | 1992-05-11 | 1992-11-25 | 东方环境工程设计研究所 | Three-way rotary butterfly switching valve |
| JP2004108397A (en) * | 2002-09-13 | 2004-04-08 | Waterworks Technology Development Organization Co Ltd | Three-way valve |
| CN101260943A (en) * | 2008-04-14 | 2008-09-10 | 浪达科技（深圳）有限公司 | Low pressure drop high-temperature gas changing-over valve |
-
2009
- 2009-11-23 CN CN2009101895107A patent/CN101769387B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3116756A (en) * | 1962-01-26 | 1964-01-07 | Gen Electric | Diverter valve means |
| US4718457A (en) * | 1986-06-20 | 1988-01-12 | Luger G William | Diverter valve |
| CN2122988U (en) * | 1992-05-11 | 1992-11-25 | 东方环境工程设计研究所 | Three-way rotary butterfly switching valve |
| JP2004108397A (en) * | 2002-09-13 | 2004-04-08 | Waterworks Technology Development Organization Co Ltd | Three-way valve |
| CN101260943A (en) * | 2008-04-14 | 2008-09-10 | 浪达科技（深圳）有限公司 | Low pressure drop high-temperature gas changing-over valve |
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|---|---|
| CN101769387A (en) | 2010-07-07 |
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Effective date of registration: 20130523 Address after: 518000, 11, Zhongxing Industrial Town, Nanshan District Road, Shenzhen, Guangdong 408 Patentee after: Shenzhen IELTS Environmental Protection Technology Co., Ltd. Address before: Nanshan District Nanyou 518060 Shenzhen Road, Guangdong No. 2336 Patentee before: Shenzhen University |
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Granted publication date: 20111221 Termination date: 20131123 |