CN107061843B - 一种应用于超临界流体色谱系统的自动背压阀 - Google Patents

一种应用于超临界流体色谱系统的自动背压阀 Download PDF

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CN107061843B
CN107061843B CN201710207040.7A CN201710207040A CN107061843B CN 107061843 B CN107061843 B CN 107061843B CN 201710207040 A CN201710207040 A CN 201710207040A CN 107061843 B CN107061843 B CN 107061843B
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CN107061843A (zh
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刘杰
张岩
严忠
李枝玲
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Jiangsu Hanbon Science and Technology Co Ltd
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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
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F16K1/38—Valve members of conical shape
    • 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
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/06—Check valves with guided rigid valve members with guided stems
    • 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
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/06—Check valves with guided rigid valve members with guided stems
    • F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
    • 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
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/08—Check valves with guided rigid valve members shaped as rings
    • 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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • 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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/044—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with more than one spring
    • 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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
    • 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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
    • F16K17/065—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure with differential piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
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    • G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02—Column chromatography
    • G01N30/26—Conditioning of the fluid carrier; Flow patterns
    • G01N30/28—Control of physical parameters of the fluid carrier
    • G01N30/32—Control of physical parameters of the fluid carrier of pressure or speed

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Abstract

本发明公开了一种应用于超临界流体色谱系统的自动背压阀，由弹簧支座、顶杆弹簧、顶杆、活塞杆、导向带、缸体、O型密封圈A、O型密封圈B、活塞杆弹簧、缸盖、导向套、陶瓷锥心、密封圈、密封座、阀体、螺钉、定位套组成，通过调节压缩空气的压力和顶杆弹簧的压缩量来保证系统压力的控制精度和稳定性，解决现有的手动背压阀无法满足超临界流体色谱仪对压力稳定性和压力控制精度的问题。

Description

一种应用于超临界流体色谱系统的自动背压阀
技术领域
本发明涉及一种应用于超临界流体色谱系统的自动背压阀，属于色谱领域。
背景技术
超临界流体色谱仪首要解决的问题是如何将CO2 超临界化，由于CO2 的临界点温度为 30.98℃，压力为 7.377MPa。一般采取提高温度增加超临界CO2泵后的压力实现，需要在超临界CO2泵后的流路中增加背压阀，通过调节背压阀的开度来控制压力，为保证超临界流体色谱仪能够稳定运行，对背压阀的压力控制精度要求比较高。目前，超临界流体色谱仪一般都采用手动背压阀, 手动背压阀一般由调节和过流两部分组成。手动被压阀是调节内置弹簧的弹力来实现压力的控制，当系统压力小于设定压力时，弹簧压住膜片堵住背压阀出口；当系统压力大于设定压力时，流体顶住膜片压缩弹簧打开背压阀出口。这种结构在系统压力大于设定压力时，流体会快速通过背压阀，系统压力会在短时间内降到设定压力以下，膜片堵住背压阀出口，这时需要系统再次将压力升到设定压力，背压阀才会打开，这就会引起系统压力的波动，压力波动会影响超临界流体色谱仪的性能。
发明内容
本发明的目的在于提供一种应用于超临界流体色谱系统的自动背压阀，以解决现有的手动背压阀无法满足超临界流体色谱仪对压力稳定性和压力控制精度的问题。
本发明的技术方案如下：
一种应用于超临界流体色谱系统的自动背压阀，由弹簧支座1、顶杆弹簧2、顶杆3、活塞杆4、导向带5、缸体6、O型密封圈A7、O型密封圈B8、活塞杆弹簧9、缸盖10、导向套11、陶瓷锥心12、密封圈13、密封座14、阀体15、螺钉16、定位套17组成。其中弹簧支座1和活塞杆4通过螺纹连接；缸盖10通过螺栓与缸体6连接；阀体15通过螺栓与缸盖10连接；螺钉16与阀体15通过螺纹连接；定位套17通过螺栓与阀体15连接。其中弹簧支座1、活塞杆4、缸体6、缸盖10、阀体15和螺钉16的材质均为316L不锈钢，导向套11、密封座14由PEEK制成，密封圈13选用全氟材料，因此，本发明能够满足绝大多数液体(包括各种化学有机溶剂)和气体的使用。
一种应用于超临界流体色谱系统的自动背压阀的调节部分有两个：一是调节A口压缩空气的压力来压缩活塞杆4，活塞杆4带动弹簧支座1压缩顶杆弹簧2，顶杆弹簧2压住顶杆3，顶杆3推动陶瓷锥心12进行密封，调节A口压缩空气的压力可以设定背压阀打开压力值（即系统压力值）；二是调节弹簧支座1与活塞杆4之间螺纹连接的长度，改变顶杆弹簧2的压缩量，在系统压力大于设定压力时，陶瓷锥心12退出密封座14，陶瓷锥心12推动顶杆3压缩顶杆弹簧2，调节顶杆弹簧2的压缩量保证陶瓷锥心12退出密封座14的速度和距离，大大减少了系统压力的波动频率及范围。
本发明与目前的手动背压阀相比的优点是：首先，与只能通过调节弹簧弹力来改变系统压力的背压阀相比本发明具有双重调节功能，通过调节弹簧弹力或者调节压缩空气的压力都可以改变系统压力；第二，通过调节压缩空气的压力来改变系统设定压力，比弹簧弹力调节更加稳定，可以实现自动化控制；第三，本发明增加了快速稳定系统压力的调节装置，能使系统压力快速稳定；第四，本发明亦可做为单向阀、安全阀来使用，且耐压能力强，使用范围广。
附图说明
附图为本发明的结构示意图
1、弹簧支座
2、顶杆弹簧
3、顶杆
4、活塞杆
5、导向带
6、缸体
7、O型密封圈A
8、O型密封圈B
9、活塞杆弹簧
10、缸盖
11、导向套
12、陶瓷锥心
13、密封圈
14、密封座
15、阀体
16、螺钉
17、定位套。
具体实施方式
结合附图对本发明作进一步详细描述。
一种应用于超临界流体色谱系统的自动背压阀，由弹簧支座1、顶杆弹簧2、顶杆3、活塞杆4、导向带5、缸体6、O型密封圈A7、O型密封圈B8、活塞杆弹簧9、缸盖10、导向套11、陶瓷锥心12、密封圈13、密封座14、阀体15、螺钉16、定位套17组成。其中弹簧支座1和活塞杆4通过螺纹连接；缸盖10通过螺栓与缸体6连接；阀体15通过螺栓与缸盖10连接；螺钉16与阀体15通过螺纹连接；定位套17通过螺栓与阀体15连接。
进出口：A为压缩空气进口，B和C为缸体排气口，D为流体进口，E为流体出口。
首先设置A口压缩空气的压力值，活塞杆4和缸体6左边的间隙为压缩空气蓄能空间，有效的稳定压缩空气对活塞杆4的瞬时作用力。活塞杆4带动弹簧支座1压缩顶杆弹簧2，顶杆弹簧2压住顶杆3，顶杆3推动陶瓷锥心12的尖角部分进入密封座14的内孔，此时本发明处于关闭状态。当流体从D口不断进入密封圈13与密封座14之间的间隙时，压力上升，在压力超过顶杆3作用于陶瓷锥心12上的压力后，陶瓷锥心12退出密封座14，此时本发明处于打开状态，流体从E口流出，调节顶杆弹簧2可以有效的保证陶瓷锥心12退出密封座14的速度和距离，从而让系统压力快速的达到稳定状态。
系统压力稳定状态：当压缩空气作用于活塞杆4上的压力等于流体在密封圈13与密封座14之间间隙的压力时，系统压力处于稳定状态，本发明处于打开状态。
以上实施例仅为说明本发明的技术思想，不能以此限定本发明的保护范围， 凡是按照本发明提出的技术思想， 在技术方案基础上所做的任何改动，均落入本发明保护范围之内。

Claims (2)

1.一种应用于超临界流体色谱系统的自动背压阀，其特征在于由弹簧支座（1）、顶杆弹簧（2）、顶杆（3）、活塞杆（4）、导向带（5）、缸体（6）、O型密封圈A（7）、O型密封圈B（8）、活塞杆弹簧（9）、缸盖（10）、导向套（11）、陶瓷锥心（12）、密封圈（13）、密封座（14）、阀体（15）、螺钉（16）、定位套（17）组成；弹簧支座（1）和活塞杆（4）通过螺纹连接；缸盖（10）通过螺栓与缸体（6）连接；阀体（15）通过螺栓与缸盖（10）连接；螺钉（16）与阀体（15）通过螺纹连接；定位套（17）通过螺栓与阀体（15）连接；调节弹簧支座（1）与活塞杆（4）之间螺纹连接的长度，改变顶杆弹簧（2）的压缩量，在系统压力大于设定压力时，陶瓷锥心（12）退出密封座（14），陶瓷锥心（12）推动顶杆（3）压缩顶杆弹簧（2），调节顶杆弹簧（2）的压缩量改变陶瓷锥心（12）退出密封座（14）的速度和距离；所述自动背压阀设置有压缩空气进口A。
2.根据权利要求1所述的一种应用于超临界流体色谱系统的自动背压阀，其特征进一步在于：弹簧支座（1）、活塞杆（4）、缸体（6）、缸盖（10）、阀体（15）和螺钉（16）的材质均采用为316L不锈钢，导向套（11）、密封座（14）由PEEK制成，密封圈（13）选用全氟材料。
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KR1020197017752A KR102208455B1 (ko) 2017-03-31 2017-09-05 초음계 유체 크로마토그래피 시스템용 자동 배압 밸브
US16/469,107 US11015717B2 (en) 2017-03-31 2017-09-05 Automatic back-pressure valve for use in supercritical fluid chromatographic system
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CN107061843B (zh) * 2017-03-31 2019-12-03 江苏汉邦科技有限公司 一种应用于超临界流体色谱系统的自动背压阀
DE202018001788U1 (de) * 2018-04-09 2018-05-18 Dr. Albin Maisch High Performance LC GmbH LC - Säule mit Dynamisch- Axialer- Kompression (DAC)
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