CN111306305A - 一种预作用报警阀阀座内置的阀门结构 - Google Patents

一种预作用报警阀阀座内置的阀门结构 Download PDF

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CN111306305A
CN111306305A CN202010151217.8A CN202010151217A CN111306305A CN 111306305 A CN111306305 A CN 111306305A CN 202010151217 A CN202010151217 A CN 202010151217A CN 111306305 A CN111306305 A CN 111306305A
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valve
valve seat
hole
early warning
water
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陈炯亮
霍达文
区家显
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GUANGDONG YONGQUAN VALVE TECHNOLOGY CO LTD
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GUANGDONG YONGQUAN VALVE TECHNOLOGY CO LTD
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Priority to PCT/CN2020/127080 priority patent/WO2021174897A1/zh
Priority to US17/673,809 priority patent/US11766580B2/en
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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
    • F16K1/42—Valve seats
    • F16K1/427—Attachment of the seat to the housing by one or more additional fixing elements
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C35/00—Permanently-installed equipment
    • A62C35/58—Pipe-line systems
    • A62C35/60—Pipe-line systems wet, i.e. containing extinguishing material even when not in use
    • A62C35/605—Pipe-line systems wet, i.e. containing extinguishing material even when not in use operating and sounding alarm automatically
    • 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
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C35/00—Permanently-installed equipment
    • A62C35/58—Pipe-line systems
    • A62C35/68—Details, e.g. of pipes or valve systems
    • 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
    • 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
    • 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
    • F16K1/42—Valve seats
    • 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
    • F16K1/46—Attachment of sealing 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
    • 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
    • F16K1/46—Attachment of sealing rings
    • F16K1/465—Attachment of sealing rings to the valve seats
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
    • F16K31/1262—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like one side of the diaphragm being 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
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0066—Hydraulic or pneumatic means
    • 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
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
    • F16K37/0091—For recording or indicating the functioning of a valve in combination with test equipment by measuring fluid parameters
    • 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
    • F16K39/00—Devices for relieving the pressure on the sealing faces
    • F16K39/02—Devices for relieving the pressure on the sealing faces for lift valves
    • F16K39/026—Devices for relieving the pressure on the sealing faces for lift valves using an external auxiliary valve
    • 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
    • F16K2200/00—Details of valves
    • F16K2200/40—Bleeding means in closed position of the valve, e.g. bleeding passages
    • F16K2200/402—Bleeding means in closed position of the valve, e.g. bleeding passages arranged on the valve housing or seat
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
    • F16K31/1266—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like one side of the diaphragm being acted upon by the circulating fluid

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  • General Engineering & Computer Science (AREA)
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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Fluid-Driven Valves (AREA)

Abstract

本发明公开了一种预作用报警阀阀座内置的阀门结构，包括：阀门本体，阀门盖、阀座、膜瓣；所述阀门本体内设有容纳腔，所述容纳腔包括入水口、出水口以及用于连通入水口和出水口的流水通孔；所述流水通孔嵌设有阀座；所述阀门本体上设置有预警通道；所述膜瓣设置于所述容纳腔内，用于控制流水通孔的开关；所述膜瓣底部设置有密封圈，所述密封圈与阀座抵接形成密封实现流水通孔的关闭；或所述密封圈与阀座分离，使得流水通孔打开；所述阀座的上表面为密封面；所述阀座上设有预警水流通孔；所述预警水流通孔的其中一个开口设置于阀座的密封面，另一个开口与所述预警通道相连通。本发明所提供的预作用功能阀门具有简单可靠，制造成本低的优点。

Description

一种预作用报警阀阀座内置的阀门结构
技术领域
本发明涉及消防用水阀门的相关领域；具体涉及一种预作用报警阀阀座内置的阀门结构。
背景技术
随着消防技术的进步，对消防用水的阀门的相关要求也日益增强。如专利CN201520937247.6所示的阀门，一般包括阀体，各种功能探头、膜瓣、以及用于将膜瓣按压在入水口密封入水口的弹簧。然而不同的场景，对于消防阀门的要求均不相同，例如图书馆，档案室等特殊场地则需要在设备发现火情的时候进行报警，而报警所需的预作用装置比较复杂，生产成本高，包括有多个探测装置和专用的阀门等控制器。因此市场上需要一种结构简单，性能可靠，造价低的预作用阀门来满足发展的需求。
发明内容
为了克服现有技术的不足，本发明的第一个目的在于提供一种预作用报警阀阀座内置的阀门结构，本发明通过在阀座上设置了预警水流通孔，同时设置了该通孔的开闭由控制水流的膜瓣统一控制，从而实现了，当火灾发生时，膜瓣打开时，预警水流通孔亦被打开，导入水流，实现报警。本发明所提供的方案具有简单可靠，制造成本低的优点。
实现本发明的目的可以通过采取如下技术方案达到：
一种预作用报警阀阀座内置的阀门结构，包括：阀门本体，阀门盖、阀座、膜瓣；
所述阀门本体内设有容纳腔，所述容纳腔包括入水口、出水口以及用于连通入水口和出水口的流水通孔；所述流水通孔嵌设有阀座；所述阀门本体上设置有预警通道；
所述膜瓣设置于所述容纳腔内，用于控制流水通孔的开关；
所述膜瓣底部设置有密封圈，所述密封圈与阀座抵接形成密封实现流水通孔的关闭；或所述密封圈与阀座分离，使得流水通孔打开；
所述阀座的上表面为密封面；所述阀座上设有预警水流通孔；所述预警水流通孔的其中一个开口设置于阀座的密封面，另一个开口与所述预警通道相连通。
优选地，所述密封面设置有第一环形凹槽，所述预警水流通孔与所述第一环形凹槽连通。
优选地，所述阀座的侧面设置有第二环形凹槽，所述第二环形凹槽分别与预警水流通孔和预警通道相连通。
优选地，所述阀座的侧面设置有第三环形凹槽，所述第三环形凹槽用于安装密封环。
优选地，所述预警通道内设置有预警套管。
优选地，所述阀座的外沿的下表面设置有用安装密封环的第四环形凹槽；使得阀座的侧面、阀座的外沿下表面与阀门本体抵接且形成密封，从而使得第二环形凹槽与阀门本体形成密闭的通道。
优选地，所述预警通道连通有警铃。
优选地，所述预警水流通孔设置有若干个，且每个预警水流通孔的一端与第一环形凹槽连通，另一端与第二环形凹槽连通。
相比现有技术，本发明的有益效果在于：
本发明通过在阀座上设置预警水流通孔，同时设置了该通孔的开闭由控制水流的膜瓣统一控制，从而，实现了，当火灾发生时，膜瓣打开时，预警水流通孔亦被打开，导入水流，实现预作用报警。本发明所提供的方案具有简单可靠，制造成本低的优点。
附图说明
图1阀门的结构示意图；
图2阀门处于关闭状态的剖视图；
图3阀门处于打开状态的剖视图；
图4所述阀座结构示意图；
图5所述阀座剖视图；
图6阀门结构示意图；
图7所述阀门剖视图；
图8图7区域C的放大图；
其中，1、膜瓣；10、入水口；13、密封圈；2、阀门本体；20、出水口；22、预警通道；221、预警套管；23、流水通孔；3、阀门盖；30、控制腔；4、阀座；41、预警水流通孔；42、第一环形凹槽；43、第二环形凹槽；44、第三环形凹槽；45、第四环形凹槽；46、密封环；5、警铃。
具体实施方式
为了便于理解本发明，下面将参照相关附图对本发明进行更全面的描述。附图中给出了本发明的较佳的实施例。但是，本发明可以用许多不同的形式来实现，并不限于本文所描述的实施例。相反地，提供这些实施例的目的是使对本发明的公开内容的理解更加透彻全面。
需要说明的是，当元件被称为“固定于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。本文所使用的术语“垂直的”、“水平的”、“左”、“右”以及类似的表述只是为了说明的目的。
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本发明。本文所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
实施例1：
如图1-3示，一种阀门结构，包括阀门本体2、阀门盖3、膜瓣1；所述膜瓣1安装在阀门本体2部的空腔内膜瓣1的膜片被夹装在阀门盖3阀门本体2间，使得膜瓣1与阀门盖3之间形成一个控制腔30；推动膜瓣1运动的弹簧可在膜瓣1上装碟形弹簧或者在膜瓣1与阀门盖3之间装螺旋弹簧，使得膜瓣1隔断入水口10和出水口20。本实施例的工作原理为；向控制腔30和入水口10注入水时，由于水压的作用，同时由于膜瓣1上弹簧的压力，使得膜瓣1实现关闭；当水压小于弹簧的弹力时，关闭功能可以由弹簧单独完成；当发生火情时，出水口20泄压，由于控制腔30与出水口20连通，控制腔30的水压下降，入水口10和出水口20形成压力差，在水压的作用下，冲开膜瓣1，实现水从入水口10经过流水通孔23抵达出水口20实现通水。
实施例2
如图1-8所示，一种预作用报警阀阀座内置的阀门结构，包括：阀门本体2，阀门盖3、阀座4、膜瓣1；
所述阀门本体2内设有容纳腔，所述容纳腔包括入水口10、出水口20以及用于连通入水口10和出水口20的流水通孔23；所述流水通孔23嵌设有阀座4；所述阀门本体2上设置有预警通道22；
所述膜瓣1设置于所述容纳腔内，用于控制流水通孔23的开关；
所述膜瓣1底部设置有密封圈13，所述密封圈13与阀座4抵接形成密封实现流水通孔23的关闭；或所述密封圈13与阀座4分离，使得流水通孔23打开；
所述阀座4的上表面为密封面，即与密封圈13的抵接面；所述阀座4上设有预警水流通孔41；所述预警水流通孔41的其中一个开口设置于阀座4的密封面，另一个开口与所述预警通道22相连通。在本实施例中，所述的阀门与实施例1的阀门运行机制相同；具体区别在于，当膜瓣1打开时，由于预警水流通孔41的开口设置在密封面，使得膜瓣1打开时，即能实现预警水流通孔41的打开，此时与之连通的预浸通道获得水流或水压，即可能唤醒警报，实现预作用报警功能。
作为优选的实施方式，所述密封面设置有第一环形凹槽42，所述预警水流通孔41与所述第一环形凹槽42连通。所述阀座4的侧面设置有第二环形凹槽43，所述第二环形凹槽43分别与预警水流通孔41、预警通22相连通。所述预警水流通孔41设置有若干个，且每个预警水流通孔41的一端与第一环形凹槽42连通，另一端与第二环形凹槽43连通。设置了第一环形凹槽42，且多个预警水流通孔41，使得密封会更容易，同时设置了第二环形凹槽43用于收集每个预警水流通孔41所流入的水流，保证了水流的量和水压；同时，第二环形凹槽43的设置也使得阀座4上预警水流通孔41与预警通道22的相连通更加方便，无需特定对位安装，减少了安装的难度。
作为优选的实施方式，所述阀座4的侧面设置有第三环形凹槽44，所述第三环形凹槽44用于安装密封环46。所述预警通道22内设置有预警套管221。使用不锈蚀的材料制成的套管221，如不锈钢，可以防止孔内由于难以防锈导致的锈蚀，或锈蚀导致堵塞；所述阀座4的外沿的下表面设置有用安装密封环46的第四环形凹槽45；使得阀座4的侧面、阀座4的外沿下表面与阀门本体2抵接且形成密封，从而使得第二环形凹槽43与阀门本体2形成密闭的通道。所述预警通道连通有警铃5，能够快速的报警，亦可连通其他报警装置，如水流探测器等实现报警。
对于本领域的技术人员来说，可根据以上描述的技术方案以及构思，做出其它各种相应的改变以及变形，而所有的这些改变以及变形都应该属于本发明权利要求的保护范围之内。

Claims (8)

1.一种预作用报警阀阀座内置的阀门结构，其特征在于，包括：阀门本体，阀门盖、阀座、膜瓣；
所述阀门本体内设有容纳腔，所述容纳腔包括入水口、出水口以及用于连通入水口和出水口的流水通孔；所述流水通孔嵌设有阀座；所述阀门本体上设置有预警通道；
所述膜瓣设置于所述容纳腔内，用于控制流水通孔的开关；
所述膜瓣底部设置有密封圈，所述密封圈与阀座抵接形成密封实现流水通孔的关闭；或所述密封圈与阀座分离，使得流水通孔打开；
所述阀座的上表面为密封面；所述阀座上设有预警水流通孔；所述预警水流通孔的其中一个开口设置于阀座的密封面，另一个开口与所述预警通道相连通。
2.如权利要求1所述的预作用报警阀阀座内置的阀门结构，其特征在于：所述密封面设置有第一环形凹槽，所述预警水流通孔与所述第一环形凹槽连通。
3.如权利要求2所述的预作用报警阀阀座内置的阀门结构，其特征在于：所述阀座的侧面设置有第二环形凹槽，所述第二环形凹槽分别与预警水流通孔和预警通道相连通。
4.如权利要求1所述的预作用报警阀阀座内置的阀门结构，其特征在于：所述阀座的侧面设置有第三环形凹槽，所述第三环形凹槽用于安装密封环。
5.如权利要求1所述的预作用报警阀阀座内置的阀门结构，其特征在于：所述预警通道内设置有预警套管。
6.如权利要求3所述的预作用报警阀阀座内置的阀门结构，其特征在于：所述阀座的外沿的下表面设置有用安装密封环的第四环形凹槽；使得阀座的侧面、阀座的外沿下表面与阀门本体抵接且形成密封，从而使得第二环形凹槽与阀门本体形成密闭的通道。
7.如权利要求1所述的预作用报警阀阀座内置的阀门结构，其特征在于：所述预警通道连通有警铃。
8.如权利要求3所述的预作用报警阀阀座内置的阀门结构，其特征在于：所述预警水流通孔设置有若干个，且每个预警水流通孔的一端与第一环形凹槽连通，另一端与第二环形凹槽连通。
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