煤矿 煤矿降压水池减压减压阀
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详细信息
煤矿井下消防洒水管道的减压方式一般 有两种:一种是采用降压水池减压,另一种是采用减压阀减压。上海申弘阀门有限公司主营阀门有:减压阀(气体减压阀,可调式减压阀,波纹管减压阀,活塞式减压阀,蒸汽减压阀,先导式减压阀,空气减压阀,氮气减压阀,水用减压阀,自力式减压阀,比例减压阀)、但多年来由于国内减压阀产品的研制、开发大多数针对建筑工程,而通过行业鉴定、真正能使设计人员及用户放心选用的国产矿用减压阀几乎是空白,如果采用国外同类产品从设计选型到用户订货、施工安装、维修服务等方面有诸多不便。因此,在煤矿井下消防洒水管道上普遍采用的仍是降压水池的减压方式。 近几年来,我院在进行煤矿井下消防洒水管道设计时遇到下列几个问题
在截止阀管件行业中,根据公称压力PN的大小,我们可以把公称压力小于等于1.6MPa的阀门为低压阀门,公称压力为2.5MPa、4.0MPa、6.4MPa的阀门为中压阀门,同时我们也经常会提到1.6MPa压力、2.5MPa压力和多少公斤压力、多少个标准大气压等之类的术语,那么1MPa压力到底有多大压强,1MPa压力等于多少公斤压力呢蒸汽压力为2.5㎏是表示2.5kg/cm2,是表示的单位面积上的压力--压强,通常俗称为2.5kg压力。新的表示方法约为0.25MPa。
换算关系:1kg/cm2=0.098MPa,因此压力2.5kg/cm2=0.245MP,可约等于0.25MPa.ISO标准帕斯卡(1Pa=1N/m2)
1公斤力/平方厘米=98.0665千帕
粗算时常按1公斤力=10N 则:
1公斤力/平方厘米=100千帕=1bar=0.1MPa
10公斤力/平方厘米=1000千帕=1MPa
公斤的单位是质量单位
MPA是压力的单位
质量m=压力/重力加速度
压力p=压力/面积
这是他们之间的关系
1公斤压力指的是1公斤重的物体作用为1cm2面积上所产生的压强,可以想像一下,1公斤重(比两瓶一元钱的康师傅矿泉水重略轻)的物体全部压在一个手指头上所产生的压强。 我们来计算一下, 1MPa=1×106Pa 1Pa=1N/1m2 1MPa=106N/m2=106N/104cm2=100N/cm2 重力加速度g约等于9.8 N/KG,为方便计算,g按整数10。 1KG的物体重力=1KG×10N/KG=10N 1公斤压力是1KG的重力作用于1cm2面积上产生的压强,即 1公斤压力=10N/cm2 1MPa=100N/cm2=10×10N/cm2 即1MPa压力等于10公斤压力。
单位说明: Pa,压强单位,中文名称为“帕斯卡”,简称“帕”,即牛/平方米,1帕=1牛/平方米 M,数量单位,M即million,数值为一百万 N,物理力学单位,简称牛,是一种衡量力的大小的单位,两个鸡蛋的重力约为1N(0.1千克的物体的重量) m,长度单位,米 m2,面积单位,平方米 cm2,面积单位,平方厘米 KG,重量单位,千克,公斤
减压阀标准一览表
标准编号 标准中文名称 标准英文名称 JB/T10367-2002 液压减压阀 GB/T12245-1989 减压阀性能试验方法 Methods of performance test for pressure reducing valves GB/T12246-1989 先导式减压阀 Pilot-operated reducing valves GB/T12244-1989 减压阀一般要求 General specification for pressure reducing valves GB/T1852-1993 船用法兰铸钢蒸汽减压阀 Marine steel flanged steam pressure reducing valves GB10868-1989 电站减温减压阀技术条件 Specification of the steam converting valve for fossil power stations JB/T7376-1994(2005复审) 气动空气减压阀 技术条件 JB/T7310-1994(2005复审) 装载机用减压阀式先导阀 JB/T53361-1994 液压减压阀产品质量分等(试行) JB/T53265-1999 先导式减压阀 产品质量分等 JB/T2205-2000 减压阀结构长度 NF P43-035-2000 建筑阀门.供水减压阀和复合供水减压阀.要求和试验 (Building valves - Water pressure reducing valves and combination water pressure reducing valves - Requirements and tests.) NF A84-420-1991 气焊设备和有关方法.减压阀入品接头.尺寸 (Equipment for gas welding and allied processes. Pressure regulators inlet connections. Dimensions.) NF M88-773-1981 商用丁烷容器装置.低压固定调节的家用商品丁烷减压阀 (INSTALLATIONS BURNING COMMERCIAL BUTANE. PRESSURE REGULATOR TRIP,LOW-PRESSURE FIXED FLOW,FOR COMMERCIAL BUTANE FOR DOMESTIC USE.) NF M88-775-1990 装液态碳氢化合物的钢瓶.可移动部分和半移动部分用高压可调减压阀.功能.标记、试验 (LIQUEFIED HYDROCARBONS SYSTEMS IN CYLINDERS. FIXED ADJUSTEMENT,HIGH PRESSURE REGULATOR FOR AND SEMI- PREMISES. CONSTRUCTION. OPERATION, MARKING,TESTS.) NF M88-737-2003 可运输可再填充液化石油气瓶用减压阀 (Pressure relief valves for transportable refillable cylinders for Liquefied Petroleum Gas (LPG).) NF E48-423-2001 液压传动.减压阀、顺序阀、卸载阀、 节流阀和止回阀.装配面 (Hydraulic fluid power - Pressure-reducing valves, sequence valves, unloading valves, throttle valves and check valves - Mounting surfaces.) ANSI/ASSE 1003-1995 家用供水系统用减压阀 (Water Pressure Reducing Valves for Domestic Water Supply Systems) ANSI/ASSE 1046-1990 热膨胀减压阀 (Thermal Expansion Relief Valve) ANSI Z 21.22a-1999 减压阀和真空减压阀 (Pressure Relief Valves and Vacuum Relief Valves) ANSI Z 21.22b-2001 热水供应系统的减压阀 (Relief Valves for Hot Water Supply Systems (same as CSA 4.4b)) ANSI/ASTM F 1508-1997 用于蒸汽、气体和液体设备的角型减压阀规范 (Specification for Angle Style, Pressure Relief Valves for Steam, Gas, and Liquid Services) ASME A112.4.1-1993 热水器减压阀排水管 (Water heater relief valve drain tubes) ASME PTC 25.3-1988 安全和减压阀 (Safety and relief valves)
ASTM E 1008-2003 地热和其它高温液体设备用减压阀体的安装、检验及维修用标准实施规范 (Standard Practice for Installation, Inspection, and Maintenance of Valve-body Pressure-relief Methods for Geothermal and Other High-Temperature Liquid Applications) 标准编号 标准中文名称 标准英文名称 ASTM F 1795-2000 空气或氮气系统用减压阀标准规范 (Standard Specification for Pressure-Reducing Valves for Air or Nitrogen Systems) ASTM F 1565-2000 蒸汽设备用减压阀标准规范 (Standard Specification for Pressure-Reducing Valves for Steam Service) ASTM F 1508-1996 用于蒸汽、气体和液体设备的角型减压阀标准规范 (Standard Specification for Angle Style, Pressure Relief Valves for Steam, Gas and Liquid Services) ASTM F 1370-1992 船上给水系统用减压阀 (Standard Specification for Pressure-Reducing Valves for Water Systems, Shipboard) BS EN 1567-2000 建筑物阀门.减压阀和组合减压阀.要求和试验 (Building valves - Water pressure reducing valves and combination water reducing valves - Requirements and tests) BS ISO 5781-2000 液压传动.减压阀、顺序阀、卸荷阀、节流阀和止回阀.安装面 (Hydraulic fluid power - Pressure reducing valves, sequence valves, unloading valves, throttle valves and check valves - Mounting surfaces) BS ISO 6264-1998 液压传动.减压阀.装配面 (Hydraulic fluid power - Pressure-relief valves - Mounting surfaces) prEN 14071-2000 液化石油气(LPG)罐的减压阀 辅助设备 Pressure relief valves for LPG tanks - Ancillary equipment BS 6283-2-1991 热水系统中使用的安全和控制装置.压力范围从1bar到10bar温度减压阀规范 (Safety and control devices for use in hot water systems - Specifications for temperature relief valves for pressures from 1 bar to 10 bar) BS 6283-4-1991 热水系统中使用的安全和控制装置.第 4部分:zui大供给压力为12bar,标准尺寸包括DN50的微量绷紧减压阀规范 (Safety and control devices for use in hot water systems - Specification for drop-tight pressure reducing valves of nominal size up to and including DN 50 for supply pressures up to and including 12 ba) DIN EN 13953-2003 液化石油气(LPG)用可运输的可再充式储气瓶的减压阀 (Pressure relief valves for transportable refillable cylinders for Liquefied Petroleum Gas (LPG); German version EN 13953:2003) DIN EN 1567-2000 建筑阀门.水减压阀和组合水减压阀.要求和试验 (Building valves - Water pressure reducing valves and combination water pressure reducing valves - Requirements and tests; German version EN 1567:1999) JIS B8652-2002 比例电动液压减压阀及安全阀的试验方法 (Test methods for electro-hydraulic proportional pressure relief valves and electro-hydraulic proportional pressure reducing and relieving valves) JIS F0504-1989 船上机械装置用减压阀的应用和压力调节 (Application and setting pressure of relief valves for ships' machinery) UL 1478-1995 消防泵减压阀 (Fire pumps relief valves ) UL 1468-1995 防火设备用直接控制的减压阀和压力(Direct acting pressure reducing and pressure
控制阀 restricting valves ) JIS B8666-2001 液压动力.减压阀.安装表面 (Hydraulic fluid power -- Pressure-relief valves -- Mounting surfaces) JIS B8372-1994 气动装置用减压阀 (PRESSURE REDUCING VALVES FOR PNEUMATIC USE) JIS B8664-2001 液压动力.压力控制阀(不包括减压 阀)、顺序活门、释荷阀、节流阀和止回阀.安装表面 (Hydraulic fluid power -- Pressure-control valves (excluding pressure-relief valves), sequence valves, unloading valves, throttle valves and check valves -- Mounting surfaces) JIS B8410 AMD 1-2003 水管用减压阀(修改件1) (Pressure reducing valves for water works (Amendment 1)) JIS B8651-2002 比例电动液压减压阀试验方法 (Test methods for electro-hydraulic proportional pressure relief valves) JIS B8410-1999 水管用减压阀 (Pressure reducing valves for water works) ISO 15500-12-2001 道路车辆.压缩天然气(CNG)燃料系统元部件.第12部分:减压阀 (Road vehicles - Compressed natural gas (CNG) fuel system components - Part 12: Pressure relief valve (PRV)) ISO 6264-1998 液压传动.减压阀.装配面 (Hydraulic fluid power - Pressure-relief valves - Mounting surfaces) ISO 5781-2000 液压传动.减压阀、顺序阀、卸荷阀、节流阀和止回阀.装配面 (Hydraulic fluid power - Pressure-reducing valves, sequence valves, unloading valves, throttle valves and check valves - Mounting surfaces) GB/T10868-2005 电站减温减压阀
:(1)矿井瓦斯浓度高,井下所有电气设施必须采用防爆型。如华晋焦煤公司吕梁公司沙曲矿井,晋城矿务局寺河矿井等高瓦斯矿井采用降压水池其进水电动阀及水位控制装置必须采用防爆型
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