CN203322337U - 带截止阀卸载的闸阀 - Google Patents

带截止阀卸载的闸阀 Download PDF

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CN203322337U
CN203322337U CN2013204150418U CN201320415041U CN203322337U CN 203322337 U CN203322337 U CN 203322337U CN 2013204150418 U CN2013204150418 U CN 2013204150418U CN 201320415041 U CN201320415041 U CN 201320415041U CN 203322337 U CN203322337 U CN 203322337U
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valve
valve rod
flashboard
inlet hole
gate
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张清明
李运龙
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KAIRUITE VALVE INDUSTRY Co Ltd
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KAIRUITE VALVE INDUSTRY Co Ltd
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Abstract

本实用新型公开了带截止阀卸载的闸阀,包括阀体、阀座、闸板、阀杆和阀盖,阀体下部两端设有介质进口和介质出口,闸板设于阀体内与阀杆连接,阀杆从阀盖中间穿过后与阀杆螺母螺纹连接,阀杆螺母与手轮连接,其特征在于:阀杆下端设有T型座,闸板上端设有T型槽,T型座在T型槽内活动嵌装并且轴向有间隙,T型槽的底部设有顶塞孔,顶塞孔侧壁设有进口孔和出口孔,进口孔与介质进口导通,出口孔与介质出口导通,顶塞孔内活动设有顶塞,顶塞由弹簧向上托起后顶靠住阀杆下端,顶塞底部活动设有密封球,在阀杆处于下限位置时,密封球将进口孔和出口孔进行阻断。本实用新型的优点是启闭力距减小,特别适合大口径闸阀。

Description

带截止阀卸载的闸阀
技术领域:
本实用新型涉及一种闸阀的改进发明。
背景技术:
闸阀是用来切断和输送介质的一种双向管道阀门,闸阀的密封是靠闸板两侧与阀座密封面形成的两个楔式密封副来完成的,在闸阀的关闭或开启过程中,两密封副会产生瞬间摩擦,由于机加工的尺寸精度误差和带压状态下,使得密封副摩擦力增大,闸阀开启或关闭的力矩也增大,特别是大口径闸阀,这种现象尤其突出,如果采用电动装置,选型很大,成本提高,不利于降低费用。
发明内容:
针对现有技术的不足,本实用新型的目的旨在提供一种启闭力距小的带截止阀卸载闸阀。
本实用新型采用的技术方案是:
带截止阀卸载的闸阀,包括阀体、阀座、闸板、阀杆和阀盖,阀体下部两端设有介质进口和介质出口,阀盖通过螺栓固定连接在阀体顶部,阀座在阀体内安装,闸板设于阀体内与阀杆连接,阀杆从阀盖中间穿过后与阀杆螺母螺纹连接,阀杆螺母与手轮连接,当手轮转动,阀杆螺母带动阀杆和闸板上下移动实现闸阀的打开或关闭,其特征在于:阀杆下端设有T型座,闸板上端设有T型槽,T型座在T型槽内活动嵌装并且轴向有间隙,T型槽的底部设有顶塞孔,顶塞孔侧壁设有进口孔和出口孔,进口孔与介质进口导通,出口孔与介质出口导通,顶塞孔内活动设有顶塞,顶塞由弹簧向上托起后顶靠住阀杆下端,顶塞底部活动设有密封球,在阀杆处于下限位置时,密封球将进口孔和出口孔进行阻断。
上述技术方案的闸阀,通过在闸板内设置一个小口径截止阀(随着闸阀口径的增大,闸板内的截止阀也增大)来使启闭力距减小,截止阀由进口孔、出口孔,密封球、顶塞、弹簧组成,其工作原理是:阀门关闭时,顺时针旋转手轮,阀杆下降,当闸板接触到阀座密封面时,截止阀先关闭,然后闸板也关闭,阀门关闭;开启时,逆时针旋转手轮,阀杆升起,由于阀杆T型座与闸板T型槽有一段空行程,在进口介质压力作用下,先打开截止阀的密封球,卸掉阀体进口端一部分压力,然后再打开闸板,从而使启闭力距减少,特别是大口径闸阀,特点尤其显著。
作为优选,进口孔和出口孔上下错位设置,进口孔位于出口孔下方。上述设计确保阀门开启时密封球在介质压力作用下顺利打开。
顶塞外圆与顶塞孔之间设有O型圈密封。上述设计确保阀门内部避免出现内泄漏。
附图说明:
图1为本实用新型的结构图,
图2为图1的局部放大图。
具体实施方式:
如图所示,本实用新型的带截止阀卸载的闸阀,包括阀体1、阀座6、闸板7、阀杆3和阀盖2,阀体1下部两端设有介质进口8和介质出口9,阀盖2通过螺栓固定连接在阀体1顶部,阀座6在阀体内固定安装,闸板7设于阀体内与阀杆3连接,阀杆3从阀盖2中间穿过后与阀杆螺母5螺纹连接,阀杆螺母5与手轮4连接,当手轮4转动,阀杆螺母5带动阀杆3和闸板7上下移动实现闸阀的打开或关闭,阀杆3下端设有T型座13,闸板7上端设有T型槽12,T型座13在T型槽12内活动嵌装并且轴向有间隙,T型槽12的底部设有顶塞孔,顶塞孔侧壁设有进口孔10和出口孔11,进口孔10和出口孔11上下错位设置,进口孔10位于出口孔11下方,进口孔10与介质进口8导通,出口孔11与介质出口9导通,顶塞孔内活动设有顶塞14,顶塞外圆与顶塞孔之间设有O型圈16密封,顶塞14由弹簧15向上托起后顶靠住阀杆3下端,顶塞14底部活动设有密封球17,在阀杆3处于下限位置时,密封球17将进口孔10和出口孔11进行阻断。
本实用新型的动作过程是:阀门关闭时,顺时针旋转手轮,阀杆下降,当闸板接触到阀座密封面时,阀杆下压顶塞及密封球,密封球将进口孔和出口孔进行阻断,截止阀先关闭,然后闸板也关闭,阀门关闭;开启时,逆时针旋转手轮,阀杆升起,由于阀杆T型座与闸板T型槽有一段空行程,在进口介质压力作用下,介质通过进口孔打开截止阀的密封球,于是进口孔和出口孔连通,阀体介质进口和介质出口导通,卸掉阀体进口端一部分压力,然后再打开闸板,从而使启闭力距减少,特别是大口径闸阀,特点尤其显著。本实用新型适用于温度在250℃以下的水、油品、蒸汽等场合。

Claims (3)

1.带截止阀卸载的闸阀,包括阀体、阀座、闸板、阀杆和阀盖,阀体下部两端设有介质进口和介质出口,阀盖通过螺栓固定连接在阀体顶部,阀座在阀体内安装,闸板设于阀体内与阀杆连接,阀杆从阀盖中间穿过后与阀杆螺母螺纹连接,阀杆螺母与手轮连接,当手轮转动,阀杆螺母带动阀杆和闸板上下移动实现闸阀的打开或关闭,其特征在于:阀杆下端设有T型座,闸板上端设有T型槽,T型座在T型槽内活动嵌装并且轴向有间隙,T型槽的底部设有顶塞孔,顶塞孔侧壁设有进口孔和出口孔,进口孔与介质进口导通,出口孔与介质出口导通,顶塞孔内活动设有顶塞,顶塞由弹簧向上托起后顶靠住阀杆下端,顶塞底部活动设有密封球,在阀杆处于下限位置时,密封球将进口孔和出口孔进行阻断。
2.如权利要求1所述的带截止阀卸载的闸阀,其特征在于:进口孔和出口孔上下错位设置,进口孔位于出口孔下方。
3. 如权利要求1所述的带截止阀卸载的闸阀,其特征在于:顶塞外圆与顶塞孔之间设有O型圈密封。
CN2013204150418U 2013-07-12 2013-07-12 带截止阀卸载的闸阀 Expired - Fee Related CN203322337U (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106585835A (zh) * 2015-10-15 2017-04-26 株式会社岛野 自行车液压部件

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106585835A (zh) * 2015-10-15 2017-04-26 株式会社岛野 自行车液压部件

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