事故配压阀说明书
调速器系统运行规程(南瑞调速器)
调速器系统运行规程1 主题内容与习惯范围1.1 本标准规定了＊＊水电站调速器系统设备运行技术规范、运行规定、运行维护与操作、异常及故障处理等内容。
1.2 本标准习惯于＊*水电站运行人员对调速器系统运行管理工作。
2 引用标准本规程是依照调速器制造厂家提供的技术资料、有关技术标准并结合本站实际情况编写。
引用标准有:电力部颁发的《电力工业技术管理法规》;电力部颁发的有关专业技术规程;3 主要设备技术规范3.1 调速器机械控制柜主要技术参数见表13.2 调速器压力油系统技术参数见表2表2 调速器压力油系统技术参数4 运行规定4.1 调速器正常运行时远方/现地选择开关置“远方”位置,一次调频开关置“投入”位置,导叶控制开关置“自动”位置,浆叶控制开关置“自动"位置。
4.2 调速器进行操作试验时,必须检查导叶机构转动部分无人作业及无异物,相应的工作票全部收回。
4.3 开机前应将调速器的水头设置为当前实际水头,开机后视机组运行工况可适当调整调速器的水头直至机组工况稳定。
4.4 机组在停机工况时,电气开度限制处于全关的位置、4.5 机组在开机过程中电气开度限制位于比当前水头下的空载开度高10%的位置,开机完成后电气开限位于比当前水头下空载开度高1０％的位置。
4.6 在机组并网后,电气开度限制自动打开到当前水头下最大的允许导叶开度的位置;当机组甩负荷时,电气开度限制在机组出口开关跳闸后导叶开度限制值压到空载时的限制值。
4.7 调速器接收到开机命令后将延时2秒钟以确认开机命令。
依照当前的运行水头,首先将导叶开启至启动开度,而桨叶则由启动开度逐渐关闭至全关位置,待机组转速达到额定转速的9０％,导叶开度逐渐减少至空载开度,自动跟踪系统频率,等待同期并网。
4.8 机组启动开度比其相应的空载开度大1０％,电气开度限制位于起动开度的位置。
4.9 当导叶实际开度与电气开度限制的位置相等时,即使此时操作增加把手,导叶开度将不再增大。
SMC增压阀VBA系列使用说明书
①清理・・・由于使用的都是精密零件，请特别注意。
・配管前请将配管内的切削末、切削油、灰尘等清理干净。若进入增压阀 内部，会导致作动不良、耐久性降低。
②配管尺寸
为充分发挥增压阀的能力，请使用与气口尺寸相匹配的配管。
若配管过细，会导致压力损失，造成增压能力下降。
③排气处理
・为排气口配管时请单独配管。若集中配管会受到背压影响导致无法增压。 ・若入口压力和出口压力的设定较接近时，可能会从排气口漏气。此现象
②排出 IN、OUT 侧空气后重新快速供气 确认泄露部位并进行修缮 更换密封件（请参考维护要领书）
①・增压阀的寿命由空气的质量和使用条件决定，有以下征兆。 ・ 即使出口流量为 0 时增压阀作动也不停止。（排气声间隔在 30s 以下时正在磨损、损伤密封件） ・ 有滑动声（异声）。（润滑脂用完） ・ 排气的消声器变黑。（密封件磨损导致磨损粉末聚集） ②进行维护时 ・ 请对空气压设备有充分知识和经验的人员按照维护要领书进行维护。 ・ 更换零件请参考维护要领书。 ③委托本公司进行维护时 ・ 在拆下连接器等附属品的情况下委托进行维护。 ・ 本体外壳，端盖等消耗品以外零部件磨耗损伤发生情况下本公司不能进行维护。
增压阀
执行元件
切换阀
・ 作业完成后请使用残压处理阀排除供给压力。 停止增压阀多余作动，防止在最低作动压力下的切换不良。
3 通阀 残压处理阀
AM
AF
增压阀
执行元件
切换阀
压力操作方法
①手柄操作型
-
・ 箭头（＋）方向压力上升，箭头（－）方向压力下降。
・ 向下按压手柄(压)即可锁住，向上拉(拉)即可解锁。
・ 设定、降低出口压力时，溢流构造会使气体从手柄部
水轮机组分段关闭装置控制方式优化
水轮机组分段关闭装置控制方式优化发布时间：2022-07-28T08:50:11.047Z 来源：《福光技术》2022年16期作者：梁浩欣[导读] 针对某水电厂分段装置电气化改造后带来的电气控制方式问题，本文提出调速器电气部分及机组监控系统双回路控制分段装置电磁阀投入的控制方式保障分段装置正确投入。
并就分段装置改造原因、改造思路等方面进行分析。
为其他水电厂类似改造提供参考。
广东粤电青溪发电有限责任公司广东梅州 514299摘要：针对某水电厂分段装置电气化改造后带来的电气控制方式问题，本文提出调速器电气部分及机组监控系统双回路控制分段装置电磁阀投入的控制方式保障分段装置正确投入。
并就分段装置改造原因、改造思路等方面进行分析。
为其他水电厂类似改造提供参考。
关键词：分段装置；电气化；双回路控制；改造思路0 引言某水电厂位于粤东片区，装设有四台36MW的轴流转浆式水轮发电机组，水轮机型号为：ZZ500-LH-500，调速器型号为BWST-100/80-4.0Mpa。
原有分段关闭装置为纯机械装置，由液控单向节流阀、先导行程阀和分段凸轮装置组成，该电厂于2021年底至2022年初对四台机组分段关闭装置及事故配压阀进行改造，改造后由GXFGY-100/4.0-DC220型号事故配压阀和分段关闭阀组合装置替代原有分段关闭装置及事故配压阀。
1 分段关闭装置改造原有分段关闭装置为纯机械装置，由液控单向节流阀、先导行程阀和分段凸轮装置组成，如图1所示。
开导叶时，压力油同时经过单向阀及分段阀，进入接力器开腔，分段装置不影响开导叶。
导叶关闭时分为以下两种情况：（1）分段凸轮尚未压住先导行程阀时，导叶快速关闭；（2）当分段凸轮压住先导行程阀时，导叶减慢关闭速度，该控制方式的分段拐点由分段凸轮安装位置决定。
水轮机导叶关闭时间应满足水电机组的调节保证计算。
调节保证计算是对机组突然改变运行工况时机组调节系统过渡过程的特性研究，目的是选定合理的导叶关闭规律，保证机组的转速变化和压力变化在合理和标准允许的范围内，从而保证机组和电站压力系统的安全稳定运行[1]。
水轮机原理及构造
水轮机原理及构造1、概述混流式水轮机工作原理：水流经压力钢管在开启蝶阀后进入蜗壳形成封闭的环流〔形成环流是为了使水流作用转轮时，使转轮各方向受力均匀，到达机组稳定运行的目的〕，在导叶开启后，水流径向进入转轮又轴向流出转轮〔所以称之为混流式水轮机〕，在这个过程中由水流和水轮机的相互作用，水流能量传给水轮机，水轮机开始旋转作功。
水轮机带动直流励磁的同步发电机转子旋转后，根据电磁感应原理〔问题〕，在三相定子绕阻中便感应出交流电势，带上外负荷后便输出电流。
注：电磁感应闭合电路的一部分导体在磁场中做切割磁感线运动时，导体中就产生感应电流，这种现象叫做电磁感应，产生的电流叫做感应电流。
①产生感应电流的必要条件是：a、电路要闭合；b、闭合电路中一部分导体做切割磁感线运动，缺一不可；假设是闭合电路的一部分导体，但不做切割磁感线运动则无感应电流，假设导体做切割磁感线运动但电路不闭合，导体上仍无感应电流则导体两端有感应电压。
②感应电流的方向跟磁场方向和导体切割磁感线运动方向有关三者互相垂直，改变磁场方向或改变导体切割磁感线方向都会改变感应电流的方向。
③在电磁感应现象中机械能转化为电能。
应用：发电机是根据电磁感应原理制成的，它使人们大规模获得电能成为现实。
①交流发电机主要由转子和定子两部分组成，另外还有滑环、电刷等。
②交流电的周期与频率周期和频率是用来表示交流电特点的两个物理量，周期是指交流发电机中线圈转动一周所用的时间，所以单位是“秒”；频率是指每秒钟内线圈转动的周数，它的单位是“赫”。
我国使用的交流电周期为0.02秒，频率是50赫，其意义是发电机线圈转一周用时0.02秒，即1秒内线圈转50周，因为线圈每转一周电流方向改变两次，所以，频率为50赫的交流电在1秒钟内方向改变100次。
2、水轮机的主要类型：水轮机基本类型有：还击式冲击式还击式：混流式〔HL〕、东风：HLA722C-LJ-192HL混流式水轮机设计序号为A722C为L立轴J金属蜗壳192转轮直径为192cm轴流式〔ZL〕：轴流转桨式〔ZZ〕轴流定桨式〔ZD〕、斜流式〔XL〕、贯流式〔GL〕：贯流转桨式〔GZ〕贯流定桨式〔GD〕特点：将位能〔势能〕、动能转换为压能，进行工作；转轮完全淹没在密闭的水体中。
一份涉及压力阀门的产品说明书
INTRODUCTIONFollow these instructions when installing and operating the product.APPLICATION LIMITSThese products are intended for use in general purpose compressed air systems only.Operating Inlet Pressure RangeOperator TypePressure Range:kPa PSIG BARSolenoid, Air Pilot, Air Pilot w/ Prestolok Adapter Minimum 40060 4.0Maximum 103515010.3High Pressure Air Pilot Minimum 40060 4.0Maximum 172425017.2High Pressure Air Pilot w/Prestolok Adapter Minimum 40060 4.0Maximum 172425017.2See caution statement below for all valves with Prestolok Adapters CAUTION: The maximum pressure rating for all valves withPrestolok adapters is shown above. The actual maximum pressure is dependent upon the type of tubing that is used. Soft Start valves with Prestolok fittings must use Parker PARFLEX tubing 1/4” OD, which has the required OD tolerances.Ambient Temperature RangeOperator TypeAmbient Temperature Range:°C °FSolenoid Minimum 0°C 32°F Maximum 60°C 140°F Air Pilot Minimum 0°C 32°F Maximum 70°C 160°F Air Pilot with Prestolok AdapterMinimum 0°C 32°F Maximum 65°C 150°F (See Caution statement below)CAUTION: The rating of 32° to 150°F, (0° to 65°C), is the ratingof the valve with a Prestolok fitting. The actual minimum and maximum temperatures are dependent upon the type of tubing that is used. Soft Start valves with Prestolok fittings must use Parker PARFLEX tubing 1/4”OD, which has the required OD tolerances.Voltage Range:The voltage range is -15% to +10% of the nominal rated voltage.INSTALLATION / OPERATING INSTRUCTIONS06 or 07 valves should be installed with reasonable accessibility for service whenever possible. Keep pipe or tubing lengths to a minimum with inside clean and free of dirt and chips. Pipe joint compound should be used sparingly and applied only to the male pipe never into the female port.Do not use Teflon †tape to seal pipe joints pieces have a tendency to break off and lodge inside the unit, possibly causing malfunction. Care should be taken to avoid undue strain on the valve.Air applied to the valve must be filtered to realize maximum component life.Life Expectancy - Normal multi-million cycle life expectancy of these valves is based on the use of properly filtered and lubricated air at room temperature. These valves are also designed to operate under non-lubricated conditions and will yield millions of maintenance free cycles.Factory Pre-Lubrication - Valves are pre-lubricated at assembly with a petroleum based grease which has a lithium content.In-Service Lubrication - In-service lubrication is not required; however, if lubrication is to be used, Schrader Bellows F442 oil is recommended. This oil is specially formulated to provide peak performance and maximum service life from all air operated equipment. Otherwise, use an air line lubricant (compatible with Nitrile & Polyurethane seals) which will readily atomize and be of the medium aniline type. Aniline point range must bebetween 180° and 220° F. Viscosity at 100° F: 140 - 170 SUS.CAUTION: Do not use synthetic, reconstituted, or oils with an alcoholcontent or detergent additive.CAUTION: Do not restrict the inlet of valves having an internal pilotsupply. Pressure supply piping must be the same size as the inlet port or larger to insure that the pilot valve receives sufficient pressure supply during high flow conditions.FUNCTIONThe Soft Start valve is a 3-port valve which supplies air in a controlled reliable manner to pneumatic systems and has the quick exhaust features of a dump valve . This valve replaces conventional main valves.The Soft Start valve operates much like a standard 3-Way valve. When the valve is installed port 2 is connected to port 3 (downstream system is exhausted to atmosphere). When a signal, (pneumatic or electric depending upon pilot operator) is received in port 12, the connectionbetween port 2 and 3 is closed. At the same time, supply air from port 1 isconnected to port 2 through the adjustable throttle, (Flow Control Screw). When the downstream pressure reaches a specific point, the main poppet opens and permits full air flow through the valve. The table shows the relationship between theinlet pressure and the downstreampressure at which the main valveopens.When the pilot signal is removed, the valve returns to its initial position and the downstream air is dumped rapidly through port 3.Installation andOperating Instructions K583432Soft Start ValveIssued: March, 1997Supersedes January, 1997P.O. Box 631Akron, Ohio 44309-0631!!!!Inlet Pressure:DownstreamPressure forFull Flow75 psig 50 psig100 psig 55 psig125 psig 60 psig150 psig 65 psig250 psig 85 psigINSTALLATIONThe Soft Start valve replaces an ordinary main valve; therefore, it is usually mounted between the air preparation unit and the system. The Soft Start valve is specifically designed to mount directly in line with the†Trademark E.I. DuPont de Nemours & Co.Schrader Bellows 06/07 Series PREP-AIR II Modular Air Preparation Units using modular body connectors. The valve can also be mounted with the aid of two screws, (sizes #10-32 or M6 are recommended).Note:When installing the valve, make sure that the Flow Control Screwis easily accessible.PORT CONNECTIONS1) Connect inlet air supply to port 1.2) Connect mufflers (or plumb exhaust) from port 3.3) Connect cylinder port 2 to cylinder or other system devices to besupplied air.4) Signal Connection - Soft Start valves may be remotely controlledelectrically or pneumatically.a) For solenoid pilot operated valves, see the instructions under“WIRING INSTRUCTIONS.”b) For air pilot operated valves, connect the air line to the pilot port12, ( 1/8” NPTF ). If using a valve with a Prestolok fitting, connect Parker PARFLEX 1/4” OD tubing by fully inserting the tubing into the Prestolok fitting, (see following Note).Note: Be sure to use the tubing support, (part no. 63 PTU), whenusing series U polyurethane tubing. All applications should be carefully tested through the full range of conditions which may be encountered prior to use.ANSI SYMBOLSWIRING INSTRUCTIONSNOTE: In addition to the following instructions, follow all requirements for local and national electrical codes.Attach an electrical cable with connector (that conforms to the DIN 43650,Form C pattern) to the terminals of the solenoid. For locations in a cabinet or other protected environment, the Snap-On connector with loose wires may be attached. In both cases, do not attach or remove the connectors until power is off.ELECTRICAL CONNECTIONValves with 3-pin male terminals should have power connected to the parallel terminals. Ground should be connected to the perpendicularterminal. Use only connectors that comply with DIN 43650, Form C (8 mm blade spacing).OVERRIDE OPERATIONThe flush non-locking manual override is located on the body of thesolenoid pilot. To operate the override, place a small screwdriver in the slot of the override and turn approximately 45° in either direction until the solenoid pilot actuates. The solenoid pilot will remain actuated until the override is released. When released, the solenoid pilot de-actuates.SOLENOID REPLACEMENTTo replace the solenoid, remove the two mounting screws and replace with the correct voltage solenoid. Tighten new screws 5 to 6 in/lbs.Voltage Coil No.Voltage Coil No.12/60P025422B4024VDC P025422B4924/60P025422B42120/60P025422B5312VDC P025422B45240/60P025422B57ACCESSORIESKit No.DescriptionPS754SB 06 Series Modular Body Connectors PS854SB 07 Series Modular Body Connectors 480810001/2 “ Exhaust MufflerPS298305SB Snap on Connector Kit with 0.5 meter wires PS298320SB Snap on Connector Kit with 2 meter wires PS2932SB 3-Pin Connector Kit - UnlightedPS294675SB 3-Pin Connector Kit - Lighted, 12VAC & DC PS294679SB 3-Pin Connector Kit - Lighted, 24VAC & DC PS294683SB 3-Pin Connector Kit - Lighted, 120VACPS2932JSB 3-Pin Connector Kit - Unlighted with 2 meter cord PS2946J75SB 3-Pin Connector Kit - Lighted, 12VAC & DC with 2meter cordPS2946J79SB 3-Pin Connector Kit - Lighted, 24VAC & DC with 2meter cordPS2946J83SB3-Pin Connector Kit - Lighted, 120VAC with 2 meter cord∅ 0.26Mount directly in line with FRL’s by using the Modular mounting system,or use holes forside mountingPorts 1 and 23/8” 06 Series 1/2” 07 Series Port 3 - 1/2”K583432EXTRA COPIES OF THESE INSTRUCTIONS ARE AVAILABLE FOR INCLUSION IN EQUIPMENT / MAINTENANCE INSTRUCTION MANUALS THAT UTILIZE THESE PRODUCTS. CONTACT YOUR LOCAL REPRESENTATIVE.。
安全抗压阀信息说明书
TECHNICAL INFORMATION SHEET ON SAFETY RELIEF VALVES (SRV)GeneralAS 4289 states “A safety relief valve shall be provided for the low pressure side of the manifolds or control arrangements.AS 5034 states “A pressure relief devise shall be provided for the low pressure side of all supply systems to protect connected equipment”.Pressure relief devices must conform to the relevant requirements in AS 1271 for this type of valve.(Small safety relief valves incorporated in a supply regulator will not suffice for this standard. They are only designed to relieve small, slow pressure build up where there is a minor seat failure or “creep”).DesignPressure relief devises (or SRV) must be designed to begin to open or crack at 1.1 times the working pressure and be fully open at 1.25 times the working pressure.They must be sized so that they can vent all excess of the maximum flow of gas in the event of a catastrophic regulator failure so that connected equipment and piping downstream, does not increase above 1.25 times the working pressure.The maximum flow of a regulator will vary dramatically from design to design depending on the flow path, the smallest orifice size and the type of valve seat.There are a number of methods to establish the maximum flow in the event of a catastrophic regulator failure, but this should try to be attained from the regulator manufacturer.If a safety relief valve is an integrated part of the regulator assembly to meet AS 5034, then the SRV will be matched to that regulator design.Note: The set pressure is the cracking or weep pressure, this is very hard to observe without the right equipment as there will only be a slight loss of gas. More important is the fully open pressure and allowable downstream pressure.Venting of SRV pressure.Where pressure relief devices (or SRV) are located in non-naturally ventilated areas, they must be connected to vent piping that will not restrict the flow of gas.Pressure relief devices (SRV) for regulators to AS 5034.The SRV must be matched to the maximum outlet pressure of the regulator and designed and sized related to maximum flow through the regulator is a failed state.Inlet pressure from the cylinder is 6,000 kPa (or 20,000 kPa for mixed gas or nitrogen)Regulator MWP is 400 kPa (This is flowing pressure, so in practice the pressure is higher)SRV set at 440 kPaThe SRV must be able to release the excess pressure (possible 20,000 kPa) without letting the downstream pressure (set at 400 kPa) exceed 500 kPa (1.25 times of regulator MWP).Safety relief devices for beverage manifold supply systems to AS 5034Due to the low bursting pressure of beer keg systems and to protect pressurized beverage storagecontainers, it is essential that each be protected by a pressure relief device fitted in the piping system immediately downstream of the regulator or as part of the low pressure side of the regulator.For example, the MWP of the keg system for the purposes of the standard is 400 kPa. The safety relief must not open before 440 kPa and must vent all excess gas pressure so that the piping or keg downstream does not increase in pressure above 500 kPa (1.25 times the MWP).It must be noted though that the SRV here are fitted to secondary regulators, which would have a maximum inlet pressure (allowable in the standard) of 2,400 kPa and in practice it is normally much lower. If the pipeline between the primary regulator and the secondary regulator in protected by a high volume SRV, then the failure of a secondary regulator will only expose the downstream pipeline servicing the kegs to this pressure. Therefore the SRV installed to protect the kegs must only be designed to relieve this pressure, within the requirements of the standard.Example where the following criteria applies to the system:CO2 Inlet pressure from the cylinder is 6,000 kPaPrimary regulator MWP is 1,000 kPa (This is flowing pressure, so in practice the pressure is higher)Primary SRV set at 1,300 kPaSecondary regulator pressure set at 400 kPaSRV protecting the keg system set at 440 kPa:Maximum exposure to secondary regulator SRV - 1,300 kPaThe SRV must be able to release the excess pressure (1,300 kPa) without letting the downstream pressure (set at 400 kPa) exceed 500 kPa.Testing Pressure relief devices (SRV).New or serviced pressure relief devices shall be assessed by a competent person prior to installation and assembly in the piping system to ensure that the device integrity has not changed during transport or storage. Valves must be assessed to meet Australian Standard AS 1271-3 for Class A. As part of a correctly specified system (including a suitable regulator to AS4267 or AS4840), the valve must fully conform to AS 5034 and AS 4289; most notably it has sufficient discharge at 125% of the set pressure.Test procedure must be performed using AS 1271, 3.4.2 as a guide.A suitable test rig must be used with a calibrated pressure gauge. A digital pressure gauge with high and low settings is preferable with accuracy of 0.5% of full scale reading.Test Requirements:For each test, record serial number and all details on a test report.Test for set pressure.Operational Limit of + or – 3% on Crack pressure or 15kPa whichever is the highest.Raise the pressure slowly at a rate of 350 kPa / min.The presure at which the top pressure stops and the bottom pressure falls is the initial weep or crack pressure.Due to initial “stickiness”of the seat, the initial reading can be discarded. The second and third test is to be recorded.Remove lock nut and re-set if required.Test for Re-seat pressure.Close valves and allow SRV seat to close, must be set at 15% of crack pressure.A new test certificate to be issued including the serial number.Test log of results is to be kept.Maintenance of Pressure relief devices (SRV).It is recommended on any gas equipment that has a soft seal, that they be refurbished or replaced every 5 years. The older the soft seal is in the SRV, the greater the “stickiness” of the valve as it is constantly under pressure from the spring onto the seat seal ring. Also open to degradation are the springs that can compress over time and lose tension. This would allow the valve to open prior to the set pressure.Serviced or refurbished valves must tested as above.Replacement valves must be fully tested prior to installation and have test certificates supplied.M. Stadtmiller(Tesuco Pty. Ltd)。
主配压阀说明书
排油状态可由以下系统实现：
断电时电液转换器的自然趋势
断电时电磁配压阀弹簧安全复位。
由脱扣器控制的配压阀的动作
D50D
D80D
D100D
D150D
阀芯重量(kg)
3.3
14.8
28
64
关机趋势(kg)
9.7Pn
24.75Pn
25Pn
25Pn
Pn=额定工作压力, bar或Mp10-1
两个控制部分的比(恒定压力与调节压力之比)为1/2.
油口的标准名称
根据所使用的技术，油口可位于配压阀的不同位置。但是，联系到以上提到的安全问题，节流孔的标记应保持一致：
油口P为主压力油进口
油口A为接力器开启腔的供油口
油口B为接力器关闭腔的供油口
油口T为开启腔的回油口
节流孔R为关闭腔的回油口(对于某些型号，此出口在内部与T口相连)
主配压阀说明书
2189A
目
介绍2
概述2
主配压阀的部件4
配置5
技术特性6
主要特性6
其它特性6
尺寸和重量6
相关设备7
液压系统7
原理9
停机态9
运行态9
概
对于大中型水轮机,将电气信号转化为液压命令不能由一单级电液转换器来完成。这将要求调速器输出功率很大并且电液转换器必需具备大功率的线圈．因而分两级液压放大是必需的：
抗氧化性(油中含水)
活动件抗磨性及抗扯性
好的抗摩擦性
主配压阀的组成
a)主配压阀的通用部件
1：阀芯
2：阀体
3：阀座
4：阀盖
5：传感器
6:开口限制
7:关闭调节杆
一起插装阀式事故配压阀“异常”动作原因分析
（ １ ） 电信号控制 。电磁阀 Ｅ Ｖ “ 投人 ” 端 电磁铁 带电， 处 于 右边 工作 位 。液 控 阀 Ｈ Ｖ控 制 腔通 回油 ， 在弹簧力的作用下处于右位工作。此时 ， ｃ １ ， ｃ ２ 控 制腔 通 压力 油 处 于关 闭状 态 ， 切 断 来 自调 速 器主 配 压阀的操作油路 ； Ｃ ３ ， Ｃ ４ 控制腔通 回油处 于开启状 态， 来 自压 力 油 罐 的操 作 油 直 接 进 入 接 力 器 的关
监控 系统报“ １ 号机组事故配压 阀动作 ” 信号 。经查 看 工业 电视 录像 ： １ ４ ： ３ ８ ： ５ ２ ， 接 力 器 开始 向关 方 向缓
慢移 动 ； １ ４ ： ３ ９ ： ５ ９ ， 导 叶全 关至 零 。
３ 事故配压 阀“ 异 常” 动作原 因分析
３ ． １ 电气 方 面原 因排 查
汤华祥 ， 常 辉
兴义 ５ ６ ２ ４ ０ ０ ）
（ 天生桥一级水 电开发有 限责任公 司水 力发电厂 ， 贵州
【 摘要】 介绍 了天生桥一级水力 发电厂一起插装 阀式事故配压阀“ 异 常” 动作事件 的情况 ， 并分析其原 因 ， 提出 了插 装 阀式 事故配压阀在设计 、 施 工及 使用过程中的注意事项 。
１ 事件 简介
事 故 配 压 阀用 于 水 轮 发 电机 组 的过 速 保 护 系
事故 配压 阀动 作 时分为 以下 两种 情况 ：
统 中， 对机组 的安全至关重要 。针对原有滑 阀式事 故配压阀存在 内漏 、 活塞卡阻等问题 ， 天生桥一级
水 力 发 电厂 于 ２ ０ １ ２ 年 初 对 ４台机 组 事 故 配 压 阀进 行 了改 造 ， 采 用 了插装 阀式 事故 配 压 阀 。插 装 阀式
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SGP型事故配压阀技术使用说明书
武汉四创自动控制技术有限责任公司
一、概述
SGP集成式事故配压阀是一种二位六通型换向阀，用于水电站水轮发电机组的过速保护系统中，当机组转速过高，调速器关闭导水机构操作失灵时，SGP集成事故配压阀接受过速保护信号动作，其阀芯在差压作用下换向，将调速器切除，油压装置上的压力油直接操作导叶接力器，实现紧急关闭导水机构，防止机组过速，为水轮发电机组的正常运行提供安全可靠的保护。
本产品通过优化设计，将传统的过速限制器上的电磁配压阀、油阀、事故配压阀集成于一体，体积更小、动作更可靠；它采用液压缓冲装置克服了原过速限制器在动作时的轰鸣声，动作平稳，使用寿命更长；安装方便，布置场地小。
二、特点
z将传统过速限制器上电磁配压阀、油阀、事故配压阀集成于一体，集成化程度高、体积小、重量轻、占用场地小、安装方便
z采用液压缓冲装置，无振动声，使用寿命长。
三、工作原理
图中2-Φ18×3管接头，标有N3的是接压力油源，标有N4接油压装置回油箱，事故配压阀左边活塞腔是常通压力油的，右边两个Φ18×3管接头所接的是压力油源及回油箱，电磁换向控制事故配压阀的右边活塞腔通压力油或排油，当事故配压阀不动作时，事故配压阀右边的活塞腔通排油，因事故配压阀左边的活塞腔是常通压力油，所以事故配压阀活塞向右边动作，此时活塞把事故配压阀的主压力油源及主回油切除掉，把主配压阀的开、关机腔与导叶接力器的开、关机腔接通。
当调速器发生故障至使机组转速过高，调速器无法完成通过接力器把导叶关闭回来，此时监控系统发至事故停机信号至事故配压阀的电磁换向阀，事故配压阀右边的活塞腔就接通压力油，因右边的活塞面积比左边的大，所以活塞向左动作，此时活塞把主配压阀的开、关机腔的油源切除掉，把导叶接力器的开、关机腔与回油、压力油接通；即系统压力油与接力器的关腔接通，接力器开腔与回油箱接通，从而实现了事故停机，避免机组发生飞逸事故。
通过调节事故配压阀右边的螺杆，可以调整活塞与阀体开口大小，限制其流量来实现事故配压阀的动作时间。
四、外形尺寸
事故配压阀外形尺寸表:
型号 d D A A1 f F B
SGP-60 60 73 400 360 20 120~142 240
SGP-80 80 89 440 400 20 138~162 300
100 110 560 520 20 177~208 320 SGP-100
SGP-150
150 160 670 630 20 262~299 400
型号B1 C E K M m n
SGP-60 200 126 159 126 75 9 50.1 SGP-80 260 138 177 138 85 17 50.1 SGP-100 280 177 230.5 177 112.5 24.5 50.1 360 222 278 222 130 76 50.1 SGP-150
型号R S Q H H1 G T
SGP-60 126 117 2-φ18×3290 154 302 150 SGP-80 138 131 2-φ18×3345 207.5 302 200 SGP-100 177 171.5 2-φ18×3369.5 232.5 302 220 SGP-150 222 204 2-φ18×3449.5 312.5 302 300
型号t W X Y L L1 n-Φd
42 42 25 100 175 42 4-Φ18
SGP-60
SGP-80
58 58 30 130 230 58 4-Φ22
68 68 35 145 225 68 4-Φ24
SGP-100
75 75 35 185 335 75 4-Φ24
SGP-150。