CN1008297B - 多功能电磁阀 - Google Patents
多功能电磁阀Info
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Abstract
多功能电磁阀是将通常自动控制***中所用的多个电磁阀的阀体制成一体或连成一体,并使它们的进口和出口各自独立或相互合并,组成多种不同型式的组合结构。同时每一电磁阀均可装有手动机构和止回阀芯,起到手动操作,调整开度和止回的作用,于是省去了通常管路***中起辅助作用的手动阀和单向阀。对于先导型电磁阀还可装上节流装置,从而使电磁阀具有磨损补偿、动作时间可调,扩大介质粘度适用范围及隔离等功能。本发明可使自动控制***结构简单,少占空间,成本降低,使用寿命延长,而且保养维修方便。
Description
本发明涉及一种电磁阀,特别是涉及一种自动控制***用的组合电磁阀。
在自动控制***中常常采用电磁阀作为执行器。为了在停电,工作压差超过额定数值或电磁阀失灵等意外情况下也能控制介质的通断,现有的办法是加装旁路手动阀。为了不停止工作能对电磁阀检修保养,又在电磁阀前后串接手动阀。如此,每只电磁阀须配三只手动阀,占空间大,成本也高。
在自动控制***中常常需采用多个电磁阀。现有的办法是选用多个单独的电磁阀,当然还需带上三倍的手动阀。这多个电磁阀所控制的管道压强若不相等,为了防止相互干扰引起倒流,还得将电磁阀后串接的手动阀改为单向阀。众多的电磁阀、手动阀,单向阀组成一个复杂的管路***。而且根据不同的使用目的,所组成的管路具有不同型式的组合结构,例如,多路独立控制的多路结构,多路掺合控制的汇流结构,同一管道分流多处的分配结构以及单路控制多种流量的多位结构等等。这些不同的组合都要用许多管接头用不同的方法连接起来,装拆很不方便,还容易泄漏。再者,现有的电磁阀是根据不同粘度的介质而设计成不同结构参数的,互不通用,电磁阀的开度也是不可调节的,动作时间也是不可调节的。而一个***中常要选用多种不同结构参数的电磁阀,所以不仅采购和安装带有许多困难,还容易出差错。
1982年5月18日由美国专利和商标局批准的第4330004号专利“电磁阀”,提出将多个电磁阀并排地固定在一个托架上,然后根据需要将它们的进口管路或出口管路并接在一起。这比起单独安装各电磁阀方便得多,但未完全解决上述存在的问题。
本发明的目的在于提供一种组合电磁阀,以减少自动控制***中的安装组件,从而大大减少其所占的空间和安装维修所花费的时间,降低成本和提高安全性。
本发明提出如下设计方案以达到上述的目的。
一、将多个电磁阀的阀体制成一体或连成一体,并使它们的进口或出口各自独立或相互合并,组成多种型式的组合结构。例如,将各个电磁阀的阀体制成一体或连成为一体,各阀的进口和出口均各自独立,构成多路独立控制的多路结构;让各阀的进口各自独立而出口并在一起,构成多源掺合控制的汇流结构;让各阀进口合并而出口各自独立,构成一源分流控制的分配结构;让各阀进出口均并在一起,构成单路控制多种流量的多位结构。这样,原先需用多只电磁阀的***,可用一只组合电磁阀代替。
二、上述的多种组合方式可通过改变进出口接头来实现,而阀的本体不变,也就是各电磁阀阀体
不再带有与管道连接的部分而成为阀本体,将各电磁阀的进口接头和出口接头分别制成一体。接头分几种型式。例如,一种是具有各自独立的通道,另一种是将各通道并在一起,同样的阀本体配上上述两种不同的接头就可构成四种不同型式的组合结构。
三、在电磁阀中组合进手动机构,方法是在阀盖或阀体上装一条轴线与阀芯运动方向相同的螺杆,螺杆上加工出操作部位或带有操作件。还可以让阀芯带一根固定的芯杆,此芯杆活动地穿过螺杆的内孔,伸出部分有限位头或限位元件,芯杆相对于螺杆可移动的距离等于或略大于阀芯额定移动距离。这种组合进手动机构的电磁阀就可省去了旁接于电磁阀的手动阀,还可对阀芯在电磁作用下所移动的距离也就是阀门的开度进行调节,起到减少电磁阀动作次数,延长使用寿命和提高***稳定性的作用。
四、在电磁阀中组合进单向阀。此单向阀是以电磁阀的阀体中阀孔的出口侧作为止回阀座,朝向止回阀座装有止回阀芯,这样就省去了原串接于电磁阀后的单向阀。这只止回阀芯还可设计成直接利用阀孔导向而省去导向元件,结构就更为紧凑。
五、对于先导型电磁阀,组合进节流装置,也就是在主阀背腔与导阀进口之间的通道上组合进节流装置,节流装置可以补偿主阀芯磨损所造成的压差损失,可扩大介质粘度适用范围,还可调节电磁阀的动作时间,并且节流装置的流量可调到零,这样就可实现隔离功能,省去串接于电磁阀的手动阀,在导阀出口还可加工出螺纹,当要检修电磁执行机构时,将节流装置调至零流量,并用螺塞堵住导阀出口,电磁执行机构就可拆下检修,同时仍可用手动机构控制介质的流量。
本发明提出的组合电磁阀具有如下优点:
1.结构紧凑,外形小巧,省去大量手动阀、单向阀,使管路***简单而利于集中控制,所占空间小,又便于安装。
2.零件数目少、通用性强,不同组合产生不同功能,便于大批量生产,制造成本低。
3.电磁阀的开度可调,动作时间可调,适用的介质粘度范围可调,并且自动手动两套装置互不干扰,还有止回作用。因而,功能齐全,用途广泛。
4.具有磨损补偿能力和隔离能力,使用寿命长,维修保养方便。
下面结合附图和实施例对本发明的具体结构作进一步的说明。
图1是现有技术中热交换器所采用的管路示意图。
图2是含有两只带手动机构、单向阀和节流装置的管道联系先导型电磁阀的组合电磁阀的轴向剖视图。
图3是含有两只电磁阀,用接头实现其进出口各自独立的组合电磁阀的剖视原理图。
图4是含有两只电磁阀,用接头把进口合并而出口独立的组合电磁阀的剖视原理图。
图5是含有两只电磁阀,用接头把出口合并而进口独立的组合电磁阀的剖视原理图。
图6是含有两只电磁阀,用接头实现其进出均合并的组合电磁阀的剖视原理图。
图3~图6的俯视剖视图同是图2。
图7是图6所示的四位组合电磁阀的流量曲线图。
图8是含有三只电磁阀的三进-出汇流的组合电磁阀的外形图。
图9是图8所示的组合电磁阀反映止回作用的俯视局部剖视图。
图1所示的管路***是现有技术中常用的。其工作原理是:当热交换器蛇形管周围的温度低于下限值时,控制器指令电磁阀〔P〕开启,送入蒸汽(或热水)加热,蒸汽换热后经过同时通电开启的电磁阀〔R〕至另处或去锅炉回收利用。当温度高于上限值时,则控制器指令冷水管道的电磁阀〔Q〕开启,冷水流到蛇形管冷却后经同时通电开启的电磁阀〔S〕回收或排放。为了防止蒸汽和冷水的供给管道的压强不等而引起倒流,在电磁阀〔P〕〔Q〕后装上单向阀d1、d2。为了防止排出管道中的压强高于另一种介质的供给管道的压强,在电磁阀〔R〕〔S〕后装上单向阀d3、d4。为了在停电、工作压差超过额定数值或电磁阀失灵时也能手动控制,又在每只电磁阀的管路中都加装了一条旁路并装上手动阀〔f1、f2、f3、f4〕。为了工作时能对电磁阀进行检修,又在电磁阀前串接手动阀〔g1、g2、g3、g4〕。在这个***中共需用四只电磁阀,四只单向阀和八只手动阀,以及连接它们用的管路和管接头,其所占空间之大可想而知,装拆繁琐还易泄漏。现可用本发明提出的组合电磁阀,就只需在热交换器的进出口管道上各接上一只如图2所示的组合电磁阀即
可。进口端选用进口独立,出口合并的汇流结构,如图4所示。出口端选用进口合并,出口独立的分配结构,如图5所示。
参照图2,这是两只带手动机构,单向阀和节流装置的管道联系先导型电磁阀组成的组合电磁阀。具体结构是:两只电磁阀的阀体〔1〕制成一个统一的整体。电磁阀由阀体〔1〕、阀芯〔2〕、压缩弹簧〔3〕、阀盖〔4〕和由电磁执行机构〔30〕控制的导阀等组成。导阀的进出口通道也在阀体〔1〕上形成。导阀出口〔29〕与主阀出口〔26〕连通,导阀进口〔28〕与主阀背腔〔21〕之间的通道〔27〕上装有节流装置,该节流装置由拧在阀盖〔4〕上的锥端螺钉〔17〕与通道上的孔所构成。在主阀背腔〔21〕与主阀进口〔22〕间通道〔20〕上也有节流装置〔16〕,其结构与上述节流装置相同。两只调节螺钉都有螺帽、垫片和密封圈加以密封。在阀盖〔4〕上还旋接着螺杆〔5〕,螺杆〔5〕上装有手柄〔10〕,螺杆〔5〕与阀盖〔4〕之间有压盖〔8〕,垫片〔7〕和填料〔6〕予以密封。阀芯〔2〕上由螺纹固定着一条芯杆〔9〕,并用螺母〔14〕锁住。芯杆〔9〕活动地穿过螺杆〔5〕的内孔伸出螺杆之外,上有两只拼紧螺母〔12〕,芯杆〔9〕相对于螺杆〔5〕可移动的距离略大于阀芯〔2〕额定移动距离。在螺杆的外端还有一只罩盖〔13〕与之成螺纹连接,并用密封圈〔11〕予以密封,防止介质从螺杆内孔泄漏。阀体〔1〕的阀孔〔24〕出口侧制成止回阀座〔25〕。朝向止回阀座〔25〕装有止回阀芯。止回阀芯由阀片〔42〕和阀瓣〔41〕组成。阀瓣包括中空的三爿以上爪状物,各爪的外侧在阀孔〔24〕内滑动,起导向作用。阀片和阀瓣可制成一体或连接而成。为了提高密封性能。还可在阀片〔42〕和阀瓣〔41〕之间固定软质密封圈(如图4所示)。止回阀芯背面装一只止回压缩弹簧〔43〕。
图2所示结构的电磁阀工作原理如下:
当导阀接受指令关闭时,介质从通道〔20〕和阀芯〔2〕外圆间隙进入背腔〔21〕,背腔〔21〕的压强与进口〔22〕相同,阀芯〔2〕紧压在阀座〔23〕上。
当导阀接受指令开启之后,背腔中介质经导阀进口〔28〕,出口〔29〕而排到主阀出口〔26〕。由于介质进入背腔〔21〕通道的截面小于背腔〔21〕排出的通道截面,背腔〔21〕内的压强小于进口〔22〕的压强,于是阀芯〔2〕在压差的作用下克服弹簧力而离开阀座〔23〕,介质便冲开止回阀芯从阀瓣的间隙中流向出口〔26〕。
当出口〔26〕的压强大于进口〔23〕的压强时,止回阀芯在弹簧〔43〕的作用下压向止回阀座〔25〕,起到了截止倒流的作用。
当需要手动操作时,只需转动手柄〔10〕,正转手柄可关闭主阀,反转手柄可打开主阀。由于芯杆在螺杆里可在额定的距离内自由移动,所以手动装置对自动控制没有干扰,而且还可转动手柄限制阀芯在自控时的移动距离,也就调节了阀门的开度,合理使用可减少电磁阀动作次数并延长使用寿命。
需要检修电磁执行机构时,只要拧紧螺钉〔17〕,使背腔〔21〕与导阀进口隔离,拆下电磁执行机构〔30〕后,用一只螺塞堵住导阀出口〔29〕,则电磁阀仍可在手动操作下继续工作。
主阀的开和关取决于阀芯〔2〕所受的进口侧与背腔的压力差,所以调节两只螺钉〔16、17〕改变背腔进出通道的截面也就可改变从接受电信号至达到上述压力差值所需时间。对于不同粘度的介质,也可调节两螺钉改变上述截面,使达到所需的压力差值,从而扩大了电磁阀适用范围。
当阀芯〔2〕外圆磨损而间隙过大时,可利用两节流装置来补偿,使进入背腔〔21〕的总截面恢复原来数值,或使进出截面差值保持不变都可恢复电磁阀的使用功能,从而延长了使用寿命。
图3至图6示出同一阀本体用两只不同的进出口接头很方便地获得四种不同的结构。图中〔51〕是将通道合并的接头,而〔52〕是通道各自独立的接头,而且进口接头和出口接头还是互换的。可见本发明组合的灵活性,接头型式并不限于内螺纹,本例仅示出用内螺纹与管道联结的接头。
图6所示的组合电磁阀,令其两只流量不同,假设阀A的流量为a,阀B的流量为b,且a<b,则当A、B均关时,流量为0;A开B关时,流量为a;A关B开时,流量为b;A、B均开时,流量为a+b,这就实现了四位调节。图7是它的流量曲线图。
当然,本发明并不限于包含两只电磁阀,可以包含多只所需的电磁阀。图8所示的就是包含三只电磁阀的组合电磁阀,它们进出口成角式配置,是三进一出的结构,图9示出它的出口部分局部剖视图。左边阀体〔65〕包含两只电磁阀,右边阀体〔66〕
只有一只电磁阀,两只阀体〔65〕、〔66〕由进口接头〔61〕和出口接头〔62〕连成一体。图中〔63〕是三只电磁执行机构,〔40〕是止回阀芯,〔68〕是中空带筋的垫座。
组合电磁阀由于功能齐全,结构紧凑,通过灵活的组合,可满足不同用途的要求。例如,上述多路结构可用来分别控制蒸汽和冷水以获得所需的温度和液位。上述汇流结构可用来控制酸和碱,以获得所需的pH值,可用来控制冷热介质,以获得所需的温度,在配料和混合***中也要用到它。又例如,上述分配结构可用来取代几只同类的电磁阀,上述多位结构可用来获得较高的控制精度。总之,组合电磁阀可在很广的领域中应用,可获得满意的技术经济效果。
Claims (7)
1、一种先导型电磁阀,包括控制介质流动的主阀和引导主阀动作的电磁先导阀,主阀包括:确定介质流动的进口、出口和进出口之间的阀座的阀体,装在阀体上与阀体一起形成阀内空腔的阀盖,在空腔内运动并能与阀座分开或密合的阀芯和使阀芯复位的弹簧;阀芯把空腔分为主腔和背腔,主腔与进口相通,导阀进口有通道与主阀背腔相通,导阀出口与主阀出口相通;其特征在于导阀进口与主阀背腔的通道上有可使导阀进口流量为零的节流装置,导阀出口通道上加工有螺纹,可用来安装螺钉,并且主阀上带有手动机构。
2、根据权利要求1所述的电磁阀,其特征在于阀体或阀盖上装有一条螺杆,其轴线与阀芯运动方向相同,能控制其启闭和开度。
3、根据权利要求2所述的电磁阀,其特征在于所述的阀芯上有一条固定的芯杆,该芯杆活动地穿过螺杆内孔,伸出部分本身带有限位头或带有限位元件。
4、根据权利要求1或2或3所述的电磁阀,其特征还在于主阀背腔与主阀进口之间有通道相连,其上有节流装置。
5、根据权利要求1所述的电磁阀,其特征还在于所述的节流装置由阀体或阀盖上的锥端螺钉及锥端所对的孔口所构成。
6、根据权利要求4所述的电磁阀,其特征还在于所述的节流装置由阀体或阀盖上的锥端螺钉及锥端所对的孔口所构成。
7、根据权利要求1所述的电磁阀,其进一步特征在于可以用两口相通和两口独立的两种接头,连接在两只所述的电磁阀的进口和出口上,实现两进两出,一进一出,一进两出和两进一出四种不同的组合。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN85103856A CN1008297B (zh) | 1985-04-29 | 1985-04-29 | 多功能电磁阀 |
US06/857,102 US4816083A (en) | 1985-04-29 | 1986-04-29 | Multifunctional electromagnetic valve assembly |
DE19863614425 DE3614425A1 (de) | 1985-04-29 | 1986-04-29 | Elektromagnetische mehrfunktions-absperrorgananordnung |
JP61100775A JPS6246073A (ja) | 1985-04-29 | 1986-04-30 | 多機能電磁弁組立体 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN85103856A CN1008297B (zh) | 1985-04-29 | 1985-04-29 | 多功能电磁阀 |
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Publication Number | Publication Date |
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CN85103856A CN85103856A (zh) | 1987-05-13 |
CN1008297B true CN1008297B (zh) | 1990-06-06 |
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CN85103856A Expired CN1008297B (zh) | 1985-04-29 | 1985-04-29 | 多功能电磁阀 |
Country Status (4)
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US (1) | US4816083A (zh) |
JP (1) | JPS6246073A (zh) |
CN (1) | CN1008297B (zh) |
DE (1) | DE3614425A1 (zh) |
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DE19611736A1 (de) * | 1996-03-25 | 1997-10-02 | Cooper Cameron Corp | Schaltventilvorrichtung |
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JP2000038148A (ja) * | 1998-07-24 | 2000-02-08 | Toyota Autom Loom Works Ltd | 車両用の電磁弁、油圧式パワーステアリング装置及び車両 |
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CN102853100B (zh) | 2011-06-27 | 2013-12-25 | 浙江三花股份有限公司 | 一种流量调节阀 |
CN102853596B (zh) | 2011-06-27 | 2015-02-18 | 浙江三花股份有限公司 | 电子膨胀阀 |
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-
1985
- 1985-04-29 CN CN85103856A patent/CN1008297B/zh not_active Expired
-
1986
- 1986-04-29 DE DE19863614425 patent/DE3614425A1/de not_active Withdrawn
- 1986-04-29 US US06/857,102 patent/US4816083A/en not_active Expired - Fee Related
- 1986-04-30 JP JP61100775A patent/JPS6246073A/ja active Pending
Also Published As
Publication number | Publication date |
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DE3614425A1 (de) | 1986-12-18 |
CN85103856A (zh) | 1987-05-13 |
US4816083A (en) | 1989-03-28 |
JPS6246073A (ja) | 1987-02-27 |
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