CN102818043A - Low-temperature ball valve - Google Patents
Low-temperature ball valve Download PDFInfo
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- CN102818043A CN102818043A CN2012103176586A CN201210317658A CN102818043A CN 102818043 A CN102818043 A CN 102818043A CN 2012103176586 A CN2012103176586 A CN 2012103176586A CN 201210317658 A CN201210317658 A CN 201210317658A CN 102818043 A CN102818043 A CN 102818043A
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Abstract
A low-temperature ball valve comprises a valve body (10), a ball spool (20) and a valve rod (30). Axis of the valve rod (30) is coaxial with a rotary axis of the spool (20) and is fixedly connected with the spool (20). One end of a tubular support (40) is fixed on the valve body (10) and coaxially sleeved on the valve rod (30) to support the valve rod (30). A gap is reserved between the valve rod (30) and the tubular support (40). A decompression passage for communicating the gap with a through hole (21) is further arranged. In the prior art, the decompression passages of the low-temperature ball valves discharges hazardous gases during decompression and is high in cost. The low-temperature ball valve is environment-friendly and low in cost.
Description
Technical field
The present invention relates to a kind of ball valve, specifically a kind of cryogenic ball valve.
Background technique
It has ball valve and revolves the action that turn 90 degrees, and its spool external frame is a spheroid, manhole or passage is arranged through its axis.Ball valve mainly is used for making cut-out, distributes and change the flow direction of medium in pipeline, it only need just can close tight with revolving the operation that turn 90 degrees and very little moment of rotation.Cryogenic ball valve is mainly used in the rugged environment of cryogenic medias such as transmission LNG Liquefied natural gas, liquid ethylene, liquid oxygen.
Generally, cryogenic ball valve comprises valve body, is arranged on the spool in the valve seat, and said spool is a spheroid, and the valve rod that is connected with spheroid supports said valve rod, with the connecting tube of the coaxial socket of said valve rod.Because cryogenic ball valve is useful in the environment of low temperature, after ball valve was closed, the cavity in the valve body was a kind of seal space; The cryogenic liquide gasification can make that the pressure in the cavity sharply rises, because ball valve of the prior art does not have the pressure release function; Ball valve can break because of superpressure; Cause wherein hazardous gas or the danger of leak of liquid, and the cryogenic liquide gasification can impact along the gap between valve rod and the connecting rod to the packing seal structure that is arranged in the valve rod; Cause filler to lose efficacy, shorten its working life greatly.
In order to solve the problems of the technologies described above, Chinese patent document CN101761661A discloses a kind of cryogenic ball valve, comprises valve seat; Be provided with valve pocket and the liquid entering hole that communicates with valve pocket, liquid outlet and valve stem port in the valve seat, be provided with spool in the valve pocket; Said valve seat is provided with the connecting tube that communicates with valve stem port; The top of connecting tube is provided with connecting base, is provided with the valve rod hole that connects with connecting tube in the connecting base, and the stuffing hole concentric with valve rod hole; The valve rod that links to each other with spool is located in connecting tube and the valve rod hole, is provided with stuffing seal between valve rod and the stuffing hole; Below stuffing seal, locate to be provided with the pressure relief opening that communicates with valve rod hole at described connecting base.
Above-mentioned Chinese patent document is arranged on said pressure relief opening on the connecting base at said connecting tube top, i.e. pressure release passage connection connects valve rod hole and carries out pressure release with the interior pressure of outer bound pair valve rod hole.But; Though such setting of pressure release passage can be let out except that the pressure in the valve rod hole, the hazardous gas in the ball valve also so is together released, and can pollute environment; In addition; In order not make the hazardous gas of releasing directly connect atmosphere, certainly will connect other parts at the pressure relief opening place, thereby increase the manufacturing and the installation cost of this cryogenic ball valve.
Summary of the invention
For this reason; Technical problem to be solved by this invention is that the pressure release passage in the cryogenic ball valve of existing technology also releases befouling environment with hazardous gas together in pressure release; And manufacture cost is high, and then the cryogenic ball valve of a kind of not only environmental protection and low cost of manufacture is provided.
For solving the problems of the technologies described above, a kind of cryogenic ball valve of the present invention comprises the valve body with an import and an outlet, and said valve body internal shaping has cavity, and said cavity is communicated with said import and said outlet;
Spherical valve core is placed in the said cavity and is positioned at outlet one side of said valve body at least with the sidewall of said cavity is sealed and matched, and is formed with through hole along its center line, and the axis that can wind perpendicular to said center line rotates;
Valve rod, said valve rod axis and the coaxial setting of the spin axis of said spool, and be fixedly connected with said spool;
Tubular bracket, an end is fixed on the said valve body, and with the coaxial socket of said valve rod, be used to support said valve rod, said valve rod and said support have the gap;
Also be provided with the pressure release passage that is communicated with said gap and said through hole.
Said pressure release passage comprises first relief hole that is arranged on said valve rod or the said support and is arranged on second relief hole on the said spool; Said first relief hole, one end is communicated with said gap; Its other end is communicated with said second relief hole, one end, and the said second relief hole the other end is communicated with said through hole.
Said first relief hole that is located on the valve rod is " 7 " font.
Said pressure release passage also comprises the 3rd relief hole that is arranged on the said spool, and when said spool was closed the state of said import and said outlet, said the 3rd relief hole was communicated with said through hole and said import.
The axis of said the 3rd relief hole and the said second relief hole axis normal.
Said spool is sealed and matched to being arranged on the outlet end Sealing between said sidewall and the said spool at the sidewall of said valve outlet one side and said cavity.
Said outlet end Sealing is the tubulose seal ring that comprises that cylindrical is smooth; Said tubulose seal ring is placed in the annular groove of said valve outlet end setting; The interior circle of tubulose seal ring and the interior round Spielpassung of annular groove; The cylindrical Spielpassung of the cylindrical of tubulose seal ring and annular groove, said tubulose seal ring deviates from a side of said spool and the bottom surface of annular groove is sealed and matched, and said tubulose seal ring has the cambered surface that cooperates with said seal spool near a side of said spool.
Interior circle and cylindrical that said tubulose seal ring deviates from said spool one side are respectively arranged with interior chamfering and outer chamfering.
Chamfering is 10～45 degree in said; Said outer chamfering is 10～45 degree.
Said valve body entrance point is provided with the entrance point Sealing and deviates from the preloading spring that said spool one end offsets.
Technique scheme of the present invention is compared existing technology and is had the following advantages,
(1) in cryogenic ball valve of the present invention, said spool and said valve rod are provided with pressure release passage, and said pressure release passage is communicated with said gap and said through hole; Promptly take above measure that support is communicated with the cavity of valve body, what keep-up pressure is stable, effectively evades the risk that support boosts unusually; Unusually the pressure releasing that boosts does not simultaneously increase external leaks point, very environmental protection to system in system pipeline; Need be at any parts of said support outer installment; Low cost of manufacture is guaranteed not superpressure of pipeline pressure, and valve is in a safe condition always.
(2) in cryogenic ball valve of the present invention; Said pressure release passage also comprise be arranged on the said spool and with the 3rd relief hole of the said second relief hole axis normal; When said spool is closed the state of said opening and said outlet; Said the 3rd relief hole and said open communication, and then the opening of said pressure release passage and valve body keeps being communicated be not no matter guaranteeing further that spool is in the state of opening or closing can superpressure.
(3) in cryogenic ball valve of the present invention; Also be provided with preloading spring between said entrance point Sealing and the said sidewall; Can effectively reduce accessory size to the susceptibility of valve seal, reduce manufacturing cost, solve the contradiction of spool operation moment of torsion and valve base sealing with the operation moment of torsion; Effectively the contraction of compensation low temperature lower valve base makes that the normal temperature of valve and low temperature seal are more reliable.
(4) deviate from said spool one side and the groove floor accumulation air of placing the sealing part for fear of said outlet end Sealing when placing institute's outlet end Sealing in the existing technology; Causing inconvenience is installed, is axially to offer gas pressure relief slot at its cylindrical place along it for the ease of the practice commonly used is installed, but under ultralow temperature and pressure medium double action; Gas pressure relief slot but becomes stress concentration point; Simultaneously because material hardening easily at low temperatures, thereby cause the gas pressure relief slot place fracture to occur easily, valve base sealing lost efficacy; Therefore; For fear of above-mentioned technical problem of the prior art, cryogenic ball valve described in the present invention is the tubulose seal ring that comprises that cylindrical is smooth at said outlet end Sealing, and said tubulose seal ring is placed in the annular groove of said valve outlet end setting; The interior circle of tubulose seal ring and the interior round Spielpassung of annular groove; The cylindrical Spielpassung of the cylindrical of tubulose seal ring and annular groove, said tubulose seal ring deviates from a side of said spool and the bottom surface of annular groove is sealed and matched, and said tubulose seal ring has the cambered surface that cooperates with said seal spool near a side of said spool; Therefore; When outlet end Sealing according to the invention was installed at normal temperatures, through Spielpassung, said tubulose seal ring can be easy to just put into annular groove; Therefore; The problem that does not exist air between valve seat and valve body, to stockpile during installation simultaneously, guarantees that the outlet end Sealing can not occur when low temperature shrinks in the sealed end valve seat that the circle locking causes said tubulose seal ring to deviate from a side of said spool and the packing less situation generation in bottom surface of annular groove in the circle and annular groove.
(5) in cryogenic ball valve of the present invention; Interior circle and cylindrical that said tubulose seal ring deviates from said spool one side are respectively arranged with interior chamfering and outer chamfering; Prevent that circle exists the region of high stress to cause crackle with the end face junction in the tubulose seal ring, effectively evade the tubulose seal ring and concentrate because of the stress of the unreasonable generation of structural design; Simultaneously, effectively improve outlet end Sealing stress distribution and contact seal specific pressure, thereby guaranteed the reliable and more excellent sealability of normal temperature and low temperature lower valve base structure, prolonged the working life of valve; Chamfering is 10～45 degree in said; Said outer chamfering is 10～45 said outlet end Sealing to be carried out force analysis when spending, and suffered stress is little when selecting other angles for use.
Description of drawings
For content of the present invention is more clearly understood, below according to a particular embodiment of the invention and combine accompanying drawing, the present invention is done further detailed explanation, wherein
Fig. 1 is the structural representation that cryogenic ball valve according to the invention is in opening state;
Fig. 2 is the partial schematic diagram that cryogenic ball valve according to the invention is in closed condition;
Fig. 3 is that pressure release passage is arranged on the partial schematic diagram on the support in the cryogenic ball valve according to the invention
Fig. 4 is the schematic representation of tubulose ring structure described in the cryogenic ball valve according to the invention;
Fig. 5 is an annular groove schematic representation of placing said tubulose seal ring in the cryogenic ball valve according to the invention.
Reference character is expressed as among the figure: 10-valve body, 11-cavity, 12-import, 13-outlet, 14-annular groove; The interior circle of 141-annular groove, the cylindrical of 142-annular groove, the bottom surface of 143-annular groove, 20-spool, 21-through hole; The 30-valve rod, 40-support, 51-first relief hole, 52-second relief hole, 53-the 3rd relief hole; 61-entrance point Sealing, 62-outlet end Sealing, the interior circle of 621-tubulose seal ring, the cylindrical of 622-tubulose seal ring, 623-tubulose seal ring deviates from a side of said spool; The 624-cambered surface, 70-preloading spring, the outer chamfering of A-, chamfering in the B-.
Embodiment
Embodiment 1
Shown in Figure 1 is the described cryogenic ball valve of present embodiment, comprises valve body 10, spherical valve core 20, and valve rod 30, tubular bracket 40, wherein,
Said valve body 10 has an import 12 and an outlet 13, and said valve body 10 internal shapings have cavity 11, and said cavity 11 is communicated with said import 12 and said outlet 13;
Said spherical valve core 20 is placed in the said cavity 11 and the sidewall of said valve body 10 outlet one sides and said cavity 11 is sealed and matched; Said spool 20 is set in the present embodiment to be sealed and matched to being arranged on the outlet end Sealing 62 between said sidewall and the said spool 20 at the sidewall of said valve body 10 outlet one sides and said cavity 11; Said outlet end Sealing 62 is the smooth tubulose seal ring of cylindrical; As shown in Figure 4; Said tubulose seal ring is placed in the annular groove 14 of said valve body 10 outlet end setting; The structure of annular groove 14 is as shown in Figure 5, interior circle 141 Spielpassung of circle 621 and said annular groove in the said tubulose seal ring, cylindrical 142 Spielpassung of said tubulose seal ring with outer 622 and said annular groove; The tubulose seal ring deviates from a side 623 of said spool and the bottom surface 143 of said annular groove is sealed and matched, and said tubulose seal ring has the cambered surface 624 that is sealed and matched with said spool 20 near a side of said spool; Said spool 20 is formed with through hole 21 along its center line, can wind the axis rotation perpendicular to said center line;
Said valve rod 30 axis and the coaxial setting of the spin axis of said spool 20, and be fixedly connected with said spool 20;
Said support 40 1 ends are fixed on the said valve body 10, and with said valve rod 30 coaxial sockets, be used to support said valve rod 30, said valve rod 30 has the gap with said support 40;
Also be provided with the pressure release passage that is communicated with said gap and said through hole 21, said pressure release passage be set in the present embodiment comprise first relief hole 51 that is arranged on said valve rod 30, said first relief hole 51 is " 7 " font, and is as shown in Figure 2; With second relief hole 52 that is arranged on the said spool 20, said first relief hole, 51 1 ends are communicated with said gap, and its other end is communicated with said second relief hole, 52 1 ends, and said second relief hole, 52 the other ends are communicated with said through hole 21.
Further; Present embodiment is on the foregoing description basis; Said pressure release passage also comprises the 3rd relief hole 53 that is arranged on the said spool 20; When said spool 20 was closed the state of said import 12 and said outlet 13, said the 3rd relief hole 53 was communicated with said through hole 21 and said import 12, and the axis and said second relief hole, 52 axis normal of said the 3rd relief hole 53 are set in the present embodiment; Said valve body 10 entrance points are provided with entrance point Sealing 61 and deviate from the preloading spring 70 that said spool 20 1 ends offset, and are as shown in Figure 2.
Further, present embodiment is on the foregoing description basis, and interior circle and cylindrical that said tubulose seal ring deviates from said spool one side 623 are provided with chamfering; Be arranged on chamfering that said tubulose seal ring deviates from circle in said spool one side be in chamfering B be 10～45 degree; Being arranged on chamfering that said tubulose seal ring deviates from said spool one side cylindrical, to be outer chamfering A be 10～45 degree, be provided with in the present embodiment said in chamfering B be 10 degree, said outer chamfering A 45 spends.
Embodiment 2
The described cryogenic ball valve of present embodiment comprises valve body 10, spherical valve core 20, and valve rod 30, tubular bracket 40, wherein,
Said valve body 10 has an import 12 and an outlet 13, and said valve body 10 internal shapings have cavity 11, and said cavity 11 is communicated with said import 12 and said outlet 13;
Said spherical valve core 20 is placed in the said cavity 11 and the sidewall of said valve body 10 and said cavity 11 is sealed and matched; Be formed with through hole 21 along its center line; Can wind axis rotation, said spool 20 is set in the present embodiment be sealed and matched to being arranged on the entrance point Sealing 61 and outlet end Sealing 62 between said sidewall and the said spool 20 at the sidewall of said valve body 10 and said cavity 11 perpendicular to said center line; The Sealing of entrance point described in the present embodiment 61 is identical with said outlet end Sealing 62; Be that said entrance point Sealing 61 all is the smooth tubulose seal ring of cylindrical with outlet end Sealing 62; As shown in Figure 4; Said tubulose seal ring is placed in the annular groove 14 of said valve body 10 outlet end setting; The structure of annular groove 14 is as shown in Figure 5, interior circle 141 Spielpassung of circle 621 and said annular groove in the said tubulose seal ring, cylindrical 142 Spielpassung of said tubulose seal ring with outer 622 and said annular groove; The tubulose seal ring deviates from a side 623 of said spool and the bottom surface 143 of said annular groove is sealed and matched, and said tubulose seal ring has the cambered surface 624 that is sealed and matched with said spool 20 near a side of said spool;
Said valve rod 30 axis and the coaxial setting of the spin axis of said spool 20, and be fixedly connected with said spool 20; Said support 40 1 ends are fixed on the said valve body 10, and with said valve rod 30 coaxial sockets, be used to support said valve rod 30, said valve rod 30 has the gap with said support 40;
Also be provided with the pressure release passage that is communicated with said gap and said through hole 21; Said pressure release passage is set in the present embodiment to be comprised first relief hole 51 that is arranged on the said support 40 and is arranged on second relief hole 52 on the said spool 20; Said first relief hole, 51 1 ends are communicated with said gap; Its other end is communicated with said second relief hole, 52 1 ends; Said second relief hole, 52 the other ends are communicated with said through hole 21; First relief hole 51 described in the present embodiment leaks in the spool 20 for being opened in the through hole on the support 40 and making the pressure of obstruct in support 40 flow into second relief hole 52 through through hole and gap through the gap that said support 40 cooperates with valve body 10, and is as shown in Figure 3.
Further, present embodiment is on the foregoing description basis, and interior circle and cylindrical that said tubulose seal ring deviates from said spool one side 623 are provided with chamfering; Be arranged on chamfering that said tubulose seal ring deviates from circle in said spool one side be in chamfering B be 10～45 degree; Being arranged on chamfering that said tubulose seal ring deviates from said spool one side cylindrical, to be outer chamfering A be 10～45 degree, be provided with in the present embodiment said in chamfering B be 45 degree, said outer chamfering A 10 spends.
As disposable embodiment; Present embodiment is on the foregoing description basis; Said outlet end Sealing replaces with employed Sealing in the existing technology; Be that above-mentioned outlet end Sealing comprises seal ring, axially offer gas pressure relief slot and the annular groove 14 that said valve body 10 outlet end are used to place said seal ring is set along it at said seal ring with outer.
Cryogenic ball valve according to the invention when cryogenic ball valve is in closed condition, rotates said valve rod 30 through the transmission of external switch device in use; The rotation of said valve rod drives said spool 20 and revolves and turn 90 degrees; Be that the through hole two ends are communicated with said import 12 and outlet 13 respectively, liquid flows out from exporting 13 successively through import 12, through hole 21; Because of entrance point valve body 10 is not very tight with spool 20 sealings; Part liquid is accumulated in the gap between said valve rod and the said support through the slit of entrance point easily, and the present invention is communicated with through hole 21 through the pressure release passage that is provided with, in case there is fluid accumulation to flow out through pressure release passage.
Obviously, the foregoing description only be for explanation clearly done for example, and be not qualification to mode of execution.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all mode of executions.And conspicuous variation of being extended out thus or change still are among the protection domain of the invention.
Claims (10)
1. a cryogenic ball valve comprises the valve body (10) with an import (12) and an outlet (13), and said valve body (10) internal shaping has cavity (11), and said cavity (11) is communicated with said import (12) and said outlet (13);
Spherical valve core (20); Be placed in the said cavity (11) and be positioned at outlet one side of said valve body (10) at least and the sidewall of said cavity (11) is sealed and matched; Be formed with through hole (21) along its center line, can wind axis rotation perpendicular to said center line;
Valve rod (30), the coaxial setting of spin axis of said valve rod (30) axis and said spool (20), and be fixedly connected with said spool (20);
Tubular bracket (40), an end are fixed on the said valve body (10), and with the coaxial socket of said valve rod (30), be used to support said valve rod (30), said valve rod (30) and said support (40) have the gap;
It is characterized in that, also be provided with the pressure release passage that is communicated with said gap and said through hole (21).
2. according to the said cryogenic ball valve of claim 1; It is characterized in that; Said pressure release passage comprises and is arranged on first relief hole (51) on said valve rod (30) or the said support (40) and is arranged on second relief hole (52) on the said spool (20); Said first relief hole (51) one ends are communicated with said gap, and its other end is communicated with said second relief hole (52) one ends, and said second relief hole (52) the other end is communicated with said through hole (21).
3. according to the said cryogenic ball valve of claim 2, it is characterized in that said first relief hole (51) that is located on the valve rod (30) is " 7 " font.
4. according to claim 2 or 3 said cryogenic ball valves; It is characterized in that; Said pressure release passage also comprises the 3rd relief hole (53) that is arranged on the said spool (20); When said spool (20) was closed the state of said import (12) and said outlet (13), said the 3rd relief hole (53) was communicated with said through hole (21) and said import (12).
5. according to the said cryogenic ball valve of claim 4, it is characterized in that the axis of said the 3rd relief hole (53) and said second relief hole (52) axis normal.
6. according to the arbitrary said cryogenic ball valve of claim 1-5; It is characterized in that the sidewall that said spool (20) is positioned at said valve body (10) outlet one side and said cavity (11) is sealed and matched to being arranged on the outlet end Sealing (62) between said sidewall and the said spool (20).
7. according to the said cryogenic ball valve of claim 6; It is characterized in that; Said outlet end Sealing (62) is the tubulose seal ring that comprises that cylindrical is smooth; Said tubulose seal ring is placed in the annular groove (14) of said valve body (10) outlet end setting; Interior circle (141) Spielpassung of the interior circle (621) of tubulose seal ring and annular groove; Cylindrical (142) Spielpassung of cylindrical of tubulose seal ring (622) and annular groove, said tubulose seal ring deviate from a side (623) of said spool and the bottom surface (143) of annular groove is sealed and matched, and said tubulose seal ring has the cambered surface (624) that is sealed and matched with said spool (20) near a side of said spool (20).
8. according to the said cryogenic ball valve of claim 7, it is characterized in that interior circle and cylindrical that said tubulose seal ring deviates from said spool one side (623) are respectively arranged with interior chamfering (B) and outer chamfering (A).
9. said according to Claim 8 cryogenic ball valve is characterized in that, said interior chamfering (B) is 10～45 degree; Said outer chamfering (A) is 10～45 degree.
10. according to the arbitrary said cryogenic ball valve of claim 1-9, it is characterized in that said valve body entrance point is provided with entrance point Sealing (61) and deviates from the preloading spring (70) that said spool (20) one ends offset.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210317658.6A CN102818043B (en) | 2012-08-31 | 2012-08-31 | Low-temperature ball valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210317658.6A CN102818043B (en) | 2012-08-31 | 2012-08-31 | Low-temperature ball valve |
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| Publication Number | Publication Date |
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| CN102818043A true CN102818043A (en) | 2012-12-12 |
| CN102818043B CN102818043B (en) | 2014-11-19 |
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| CN201210317658.6A Active CN102818043B (en) | 2012-08-31 | 2012-08-31 | Low-temperature ball valve |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103115164A (en) * | 2013-02-04 | 2013-05-22 | 连云港远洋流体装卸设备有限公司 | Spring compensated type low temperature floating ball valve |
| CN104033617A (en) * | 2014-04-28 | 2014-09-10 | 江苏盐电阀门有限公司 | Ultralow-temperature trunnion ball valve |
| CN104534117A (en) * | 2014-10-31 | 2015-04-22 | 双恒阀门有限公司 | Low-temperature expanding spherical gate valve |
| CN105257859A (en) * | 2015-11-10 | 2016-01-20 | 五洲阀门有限公司 | Ultra-low-temperature top entry ball valve and assembly method thereof |
| CN110005841A (en) * | 2019-05-23 | 2019-07-12 | 成都富临精工电子电器科技有限公司 | A kind of rotary three-way valve structure |
| CN110043692A (en) * | 2019-05-23 | 2019-07-23 | 成都富临精工电子电器科技有限公司 | A kind of electronics four-way valve arrangement |
| CN114754162A (en) * | 2022-04-15 | 2022-07-15 | 浙江贝尔控制阀门有限公司 | Low-temperature ball valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103115164A (en) * | 2013-02-04 | 2013-05-22 | 连云港远洋流体装卸设备有限公司 | Spring compensated type low temperature floating ball valve |
| CN104033617A (en) * | 2014-04-28 | 2014-09-10 | 江苏盐电阀门有限公司 | Ultralow-temperature trunnion ball valve |
| CN104534117A (en) * | 2014-10-31 | 2015-04-22 | 双恒阀门有限公司 | Low-temperature expanding spherical gate valve |
| CN104534117B (en) * | 2014-10-31 | 2019-01-01 | 双恒阀门有限公司 | A kind of low temperature prop open type ball surface gate valve |
| CN105257859A (en) * | 2015-11-10 | 2016-01-20 | 五洲阀门有限公司 | Ultra-low-temperature top entry ball valve and assembly method thereof |
| CN110005841A (en) * | 2019-05-23 | 2019-07-12 | 成都富临精工电子电器科技有限公司 | A kind of rotary three-way valve structure |
| CN110043692A (en) * | 2019-05-23 | 2019-07-23 | 成都富临精工电子电器科技有限公司 | A kind of electronics four-way valve arrangement |
| CN114754162A (en) * | 2022-04-15 | 2022-07-15 | 浙江贝尔控制阀门有限公司 | Low-temperature ball valve |
| CN114754162B (en) * | 2022-04-15 | 2024-02-06 | 浙江贝尔控制阀门有限公司 | Low-temperature ball valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102818043B (en) | 2014-11-19 |
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