WO2013181933A1 - 电磁差动安全阀 - Google Patents

电磁差动安全阀 Download PDF

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Publication number
WO2013181933A1
WO2013181933A1 PCT/CN2013/000677 CN2013000677W WO2013181933A1 WO 2013181933 A1 WO2013181933 A1 WO 2013181933A1 CN 2013000677 W CN2013000677 W CN 2013000677W WO 2013181933 A1 WO2013181933 A1 WO 2013181933A1
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WO
WIPO (PCT)
Prior art keywords
valve
core
flap
opening
electromagnetic
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PCT/CN2013/000677
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English (en)
French (fr)
Inventor
顾根泉
孙艳玲
王永良
李铁
杨英福
Original Assignee
国家电网公司
河南平高电气股份有限公司
平高集团有限公司
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Application filed by 国家电网公司, 河南平高电气股份有限公司, 平高集团有限公司 filed Critical 国家电网公司
Publication of WO2013181933A1 publication Critical patent/WO2013181933A1/zh

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Classifications

    • 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
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0644—One-way valve
    • F16K31/0655—Lift valves

Definitions

  • the present invention relates to a safety valve, and more particularly to an electromagnetic differential safety valve for a hydraulic operating mechanism for a high-pressure, ultra-high-pressure, ultra-high-voltage circuit breaker and integrated with a drain valve function.
  • the safety valve is an important safety module for the hydraulic operating mechanism of the high-voltage circuit breaker.
  • the safety valve can release the pressure in time to achieve the voltage regulation.
  • the traditional safety valve is a mechanical direct-acting safety valve, including a valve body, a valve seat, a wide valve, a spring disposed on the back of the valve flap, a high-pressure port disposed at the front of the valve flap, and a low-pressure interface disposed at the back of the valve flap.
  • the liquid's own pressure overcomes the spring force to open the valve flap to open the valve port for bleed and pressure reduction.
  • the valve flap is closed by the spring.
  • the spring and the spring that maintain the valve port are required to have high rigidity and compression requirements, resulting in a relatively high opening resistance of the safety valve.
  • the valve is completed after the pressure relief is completed. The flap is not easily closed reliably, preventing the hydraulic system from maintaining pressure, resulting in pressure relief, frequent pressure, latch-up, and the like. If the above-mentioned problems occur in the normal operation of the hydraulic operating mechanism, the stability and reliability of the circuit breaker operation will be reduced, and even serious accidents may occur.
  • the pressure relief valve used in the hydraulic system functions to release pressure during commissioning and maintenance, and is generally mechanically manual.
  • the commonly used hydraulic operating mechanism generally includes two hydraulic components, a safety wide and a high pressure oil drain valve, but their functions are repeated, which increases the oil leakage on the one hand and increases the hydraulic operating mechanism on the other hand. cost.
  • An object of the present invention is to provide an electromagnetic differential safety valve for the above problems, which overcomes the problem that the safety valve requires high spring stiffness and compression, large opening resistance, and unreliable closing.
  • an electromagnetic differential safety valve comprising a valve flap, a sley, a high pressure port and a low pressure port, wherein the valve flap extends along a closing direction thereof and is provided with a valve a core sliding seal is disposed in the valve seat, the high pressure interface is disposed on one side of the wide flap opening direction, and the low pressure interface is disposed on a side of the valve flap closing direction;
  • the low-pressure interface is provided with a flow port, the wide core is provided with a diameter connecting the flow port and the valve flap;
  • the valve flap extends along the opening direction thereof and is provided with a valve core return spring and the sliding seal is inserted into the valve body a spool in which a closed chamber is formed between the end of the spool and the valve body, and the safety valve is provided with a communication passage to communicate the closed chamber with the low pressure interface;
  • One end of the valve seat is provided with an electromagnet opening device that pushes the wide core to open.
  • the structure of the invention for placing the high-pressure interface on one side of the valve flap opening direction is completely different from the existing safety valve, and the opening of the valve flap is realized by the electromagnetic opening device provided with the matching, and the valve core return spring does not have to bear further Balancing the high-pressure oil, the requirements for its own stiffness are greatly reduced, and the resistance to the opening is also reduced.
  • the solenoid valve continues to be energized, the valve port can be maintained in the open state, ensuring smooth pressure discharge and stable performance. After the pressure returns to normal, the electromagnet loses power, and the valve port is closed under the action of the hydraulic medium pressure and the spool return spring. The greater the pressure, the more reliable the closing, avoiding the valve frequency hopping, pressure relief and leakage.
  • the design of the connecting channel adopts a differential connection, so that the hydraulic effective area acting upward on the end of the valve post and the valve core is larger than the hydraulic effective area acting downward on the wide core, so the hydraulic oil itself can provide the valve closing direction.
  • the force can be fine-tuned by adjusting the spool diameter.
  • the flow direction of the high-pressure oil disposed at the bottom of the valve flap is the same as the closing direction of the valve flap, which is more favorable for closing the valve flap, thereby making the safety valve closing more reliable.
  • the electromagnetic differential safety valve is a poppet valve, which is sealed and sensitive, and can better avoid leakage.
  • the connecting passage is a hole obliquely crossing the inside of the valve body, one end of the hole communicates with the closed chamber, and the other end communicates with the low pressure port. This avoids additional leakage hazards and performance effects from the connecting lines and makes the safety valve structure more compact.
  • the electromagnet opening device includes an armature opposite to the valve core at one end, and the other end of the armature protrudes from the top of the electromagnet and is correspondingly provided with a pressing device for pushing the armature downward.
  • the pressing device can manually press down the armature and push the spool to achieve manual pressure relief, thereby integrating the function of the drain valve and reducing the number of parts and leakage of the hydraulic system.
  • FIG. 1 is a schematic structural view of an embodiment of an electromagnetic differential safety valve of the present invention.
  • the safety valve is an integrated electromagnetic differential safety valve, which mainly comprises a safety valve body portion, an electromagnetic driving portion and a drain valve driving portion.
  • the main body portion includes a valve flap 18, a valve seat 4, a high pressure interface, and a low pressure interface.
  • the valve disc 18 adopts a cone valve structure, and a valve core 6 is disposed along the closing direction of the valve disc 18.
  • the valve core 6 is slidingly sealed and disposed in the valve seat 4 and the valve sleeve 5, and the high pressure interface is disposed on the valve flap.
  • 18 is on one side of the opening direction, and the low pressure interface is disposed on a side of the valve flap 18 in the closing direction;
  • the valve seat 4 is provided with a flow port corresponding to the low pressure interface position, and the valve core 6 is provided with a diameter connecting the flow port and the valve flap 18; the valve flap 18 extends along the opening direction thereof and is mounted on the spring seat.
  • a spool return spring 10 on the seventh and sliding seal is inserted into the spool 19 in the valve body 8, and a chamber larger than the spool opening stroke is left between the end of the spool 19 and the valve body 8, the chamber
  • the closed chamber is closed by a bottom cover 11 disposed on the valve body, and the bottom cover 11 and the valve body 8 are connected by bolts and sealed by a sealing ring 9; the valve body 8 is provided with a long hole in an obliquely intersecting manner, and the long hole is connected at one end.
  • the closed chamber is connected to the low pressure port; the end of the valve core 6 passing through the valve seat 4 is provided with an electromagnet 1 for pushing the valve core 6 to open.
  • Electromagnetic drive portion The safety valve is provided with an electromagnet 1 including an armature 2, and the armature 2 is opposed to an end face of the valve body 6 extending out of the valve seat 4.
  • the electromagnet 1 and the valve body 8 are assembled by long studs, and a sealing ring 9 is provided on the joint surface to achieve sealing.
  • the outlet seat 17 of the electromagnet 1 leads the control circuit to the oil pressure switch of the pipeline system to control the electromagnet to be powered and de-energized.
  • the lower end of the armature 2 is also provided with an electromagnet return spring 3 compressed between the armature 2 and the valve seat 4.
  • the oil drain valve driving portion the armature 2 protrudes from the top of the electromagnet, the corresponding end is provided with a jack 14 for pushing the movement of the armature 2, a hand wheel 15 connected to the jack 14 through the pin 16, and
  • the electromagnet housing 13 is connected by a screw-connected top cover 12, wherein a part of the length of the ejector 14 has an externally threaded structure, which can be rotated in the threaded hole with the top of the electromagnet 1 and moved up and down with the rotation, and the top cover 12 is used. To limit the displacement of the ejector 14.
  • the oil pressure switch contact opens, the electromagnet 1 loses power, and the armature 2 is reset by the electromagnet return spring 3, and the core 6 is under the pressure formed by the spool return spring 10 and the oil pressure difference. Closed in the direction of high pressure oil flow.
  • the poppet valve structure used in this embodiment may also be a conventional ball valve structure, a planar sealing structure or a blade sealing structure; and the cross-connect channel used in this embodiment.
  • the armature pushing device can also be used in the usual form of articulating the lever on the top of the electromagnet 1, and it is also possible to push the armature 2 downward to open the flap.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

一种电磁差动安全阀，所述阀瓣（18）沿其关闭方向延伸设有阀芯（6），所述阀芯（6）滑动密封贯穿设于阀座（4）中，所述高压接口设置于阀瓣（18）开启方向的一侧，所述低压接口设于阀瓣（18）关闭方向的一侧；所述阀座（4）上对应低压接口位置设有流通口，所述阀芯（6）设有连通流通口与阀瓣（18）的通径；所述阀瓣（18）沿其开启方向延伸设有安装有阀芯复位弹簧（10）且滑动密封插配于阀体（8）中的阀柱（19），所述阀柱（19）末端与阀体（8）之间留有大于阀芯（6）开启行程的封闭腔室，所述安全阀设有连通通道将所述腔室与低压接口连通；所述阀芯（6）穿出阀座（4）的一端设置有推动阀芯（6）开启的电磁铁开启装置。该安全阀具有对弹簧要求低、开启阻力小、开闭可靠等特点并集成了放油阀功能。

Description

电磁差动安全阀 技术领域
[0001] 本发明涉及一种安全阀， 特别是一种用于高压、 超高压、 特高压断路器用液压操动 机构且集成了放油阀功能的电磁差动安全阀。
背景技术
[0002] 安全阀是高压断路器液压操动机构重要的保险模块， 当***储能超过预设压力或者 ώ于电气故障等原因造成***压力过高吋， 安全阀能及时释放压力达到稳压、 调压的作用， 压力释放完成后， 阀门需及时可靠地关闭， 以维持***压力、 避免介质和能量的损失。 目前 传统的安全阀是机械式直动安全阀， 包括阀体、 阀座、 阔瓣、 设于阀瓣背部的弹簧、 设于阀 瓣前部的高压接口以及设于阀瓣背部的低压接口等。 若***压力超过设定值， 液体自身压力 克服弹簧弹力将阀瓣顶丌从而打开阀口进行泄流降压， 泄压完成后阀瓣在弹簧的作用下关 闭。 但是为满足高压要求， 维持阀口关闭的弹簧的刚度和压缩量要求很高， 造成安全阀的开 启阻力比较大， 另外 ώ于***液动力、 摩擦力较大以及瞬时冲击， 完成泄压后阀瓣不容易可 靠关闭， 使液压***无法保持压力， 从而导致泄压、 频繁打压、 闭锁等故障。 正常运行的液 压操动机构如果出现上述问题， 将降低断路器运行的稳定性和可靠性， 甚至造成严重的事 故。
[0003] 另外液压***所用的泄压阀在调试、 维护时起到释放压力的作用， 一般为机械手动 式。 常用的液压操动机构上一般包括安全阔和高压放油阀两个液压组件， 可是他们的作用有 一定的重复， 这样一方面增加了漏油的环节， 另一方面增加了液压操动机构的成本。
发明内容
[0004] 本发明的目的在于针对以上问题提供一种电磁差动安全阀， 克服安全阀对弹簧刚度 及压缩量要求高、 开启阻力大和关闭不可靠的问题。
[0005] 为实现上述目的， 本发明采用的技术方案是： 一种电磁差动安全阀， 包括阀瓣、 闽 座、 高压接口和低压接 Π , 所述阀瓣沿其关闭方向延伸设有阀芯， 所述阀芯滑动密封贯穿设 于阀座中， 所述高压接口设置于阔瓣丌启方向的一侧， 所述低压接口设于阀瓣关闭方向的一 侧； 所述阀座上对应低压接口位置设有流通口， 所述阔芯设有连通流通口与阀瓣的通径； 所 述阀瓣沿其丌启方向延伸设有安装有阀芯复位弹簧且滑动密封插配于阀体中的阀柱， 所述阀 柱末端与阀体之间留有大于阀芯开启行程的封闭腔室， 所述安全阀设有连通通道将所述封闭 腔室与低压接口连通； 所述阁芯穿出阀座的一端设置有推动阔芯开启的电磁铁开启装置。 [0006] 本发明采用的将高压接口设置于阀瓣丌启方向一侧的结构完全不同于现有安全阀， 其阀瓣的开启依靠配套设置的电磁开启装置实现， 阀芯复位弹簧不用再承担平衡高压油的 力， 对其自身的刚度要求大大降低， 丌启阻力也随之下降。 只要电磁阀持续得电， 阀口即可 一直维持丌启状态， 保证压力顺利排放， 性能稳定。 压力恢复正常后， 电磁铁失电， 阀口在 液压介质压力和阀芯复位弹簧共同作用下关闭， 压力越大关闭越可靠， 避免了阀门频跳、 泄 压和泄漏。 另外连接通道的设计采用了差动连接， 使向上作用在阀柱末端及阀芯上的液压有 效面积大于向下作用在阔芯上的液压有效面积， 因此液压油本身可以提供阀瓣关闭方向的 力， 力的大小可以通过调整阀柱直径微调。 并且， 设于阀瓣底部的高压油的流向与阀瓣关闭 方向相同， 更利于阀瓣关闭， 从而使安全阀的关闭更加可靠。
[0007] 作为优选， 所述电磁差动安全阀是锥阀， 密封好， 动作灵敏， 能够更好地避免泄 露。
[0008] 作为优选， 所述连接通道是斜向交叉设置于阀体内部的孔， 孔的一端连通所述封闭 腔室， 另一端连通低压接口。 这样可避免额外增加连接管路带来的泄露隐患和性能影响， 也 使安全阀结构更加紧凑。
[0009] 作为一种改进， 所述电磁铁开启装置包括一端与阀芯相对的衔铁， 衔铁另一端伸出 电磁铁顶部且对应设置有推动衔铁向下运动的顶压装置。 该顶压装置可以采用手动操作将衔 铁下压并推动阀芯运动， 实现手动泄压， 从而集成放油阀的功能， 同时可减少液压***零部 件数量和渗漏部位。
附图说明
[0010] 下面结合具体实施例附图对本发明作进一歩说明。
[0011] 图 1是本实用新型电磁差动安全阀某实施例的结构示意图。
[0012] 各附图标记名称如下： 1 电磁铁， 2衔铁， 3电磁铁复位弹簧， 4阀座， 5阀套， 6阀 芯， 7弹簧座， 8阀体， 9密封圈， 10阀芯复位弹簧， 11底盖， 12顶盖， 13 电磁铁壳体， 14顶杆， 15手轮， 16销轴， 17出线座， 18阀瓣， 19阀柱。
具体实施方式
【0013〗 本电磁差动安全阀的一个实施例如图 1 所示， 该安全阀为集成式电磁差动安全阀， 主要包括安全阀本体部分、 电磁驱动部分和放油阀驱动部分。
[0014] 主体部分： 包括阀瓣 18、 阀座 4、 高压接口和低压接口。 所述阀瓣 18 采用锥阀结 构， 沿阀瓣 18关闭方向延伸设有阀芯 6， 所述阀芯 6滑动密封贯穿设于阀座 4、 阀套 5内， 所述高压接口设置于阀瓣 18开启方向的一侧， 所述低压接口设于阀瓣 18关闭方向的一侧； 所述阀座 4 上对应低压接口位置设有流通口， 所述阀芯 6 设有连通流通口与阀瓣 18 的通 径； 所述阀瓣 18沿其丌启方向延伸设有安装在弹簧座 7上的阀芯复位弹簧 10且滑动密封插 配于阀体 8中的阀柱 19， 所述阀柱 19末端与阀体 8之间留有大于阀芯开启行程的腔室， 所 述腔室通过设置于阀体上的底盖 11封闭形成封闭腔室， 底盖 11与阀体 8通过螺栓连接并使 用密封圈 9密封； 阀体 8内斜向交叉设置有长孔， 长孔一端连通所述封闭腔室， 另一端连通 低压接口； 所述阀芯 6穿出阀座 4的一端设置有推动阀芯 6丌启的电磁铁 1作为开启装置。
[0015] 电磁驱动部分： 所述安全阀设有包括衔铁 2的电磁铁 1， 所述衔铁 2与伸出阀座 4的 阀芯 6端面相对。 电磁铁 1与阀体 8通过长螺柱装配到一起， 并在结合面设有密封圈 9实现 密封。 电磁铁 1 的出线座 17引出控制线路与管路***的油压开关连接， 控制电磁铁得电和 失电。 衔铁 2下端还设置有压缩在衔铁 2和阀座 4之间的电磁铁复位弹簧 3。
[0016] 放油阀驱动部分： 所述衔铁 2 伸出电磁铁顶部， 对应该端设置有用于推动衔铁 2运 动的顶杆 14、 与顶杆 14通过销轴 16连接的手轮 15， 以及与电磁铁壳体 13通过螺纹连接的 顶盖 12， 其中顶杆 14的一部分长度有外螺纹结构， 可以在电磁铁 1顶部与之配合的螺纹孔 内转动并随着转动上下运动， 顶盖 12用于限制顶杆 14的位移。
[0017] 本实施例的工作方式： ***油压一旦超过设定值， 油压丌关触点闭合， 电磁铁 1 得 电吸合， 驱动衔铁 2 向下运动， 运动到一定位置， 克服阀芯复位弹簧 10的弹力和压差形成 的阻力带动阀芯 6 向下运动， 将阀瓣 18打丌， 高压油通过打丌的阀口流向低压油， 起到泄 压调压的作用。 压力恢复设定值后， 油压开关触点打开， 电磁铁 1失电， 衔铁 2在电磁铁复 位弹簧 3作用下复位， 闽芯 6因阀芯复位弹簧 10和油压差形成的压力作用下沿高压油流向 方向关闭。
[0018] 若需进行***调试维护， 只需转动手轮 15 带动顶杆 14 转动， 继而通过电磁铁壳体 13 推动顶杆 14 向下运动推动衔铁 2和阀芯 6使阀瓣 18 开启， 实现放油泄压； 放油完成 后， 反向转动手轮 15， 顶杆 14离开阀芯 6， 阀芯 6在阀芯复位弹簧 10的作用下向上运动使 阀瓣 18关闭， 衔铁 2在电磁铁复位弹簧 3的作用下复位。
[0019] 在其他实施例中， 本实施例所采用的锥阀结构也可以是惯用的球阀结构、 平面密封 结构或者刀面密封结构等密封副结构； 另外， 本实施例中采用的交叉连接通道仅是为了使所 述封闭腔室与与低压接口连通， 自然也可采用其他形式的通道或在阀体外另设管路。 所述的 衔铁推动装置亦可以采用在电磁铁 1顶部铰接杠杆的常用形式， 同样能够实现将衔铁 2向下 推动从而丌启阀瓣。

Claims

权 利 要 求 书
1. 一种电磁差动安全阀， 包括阀瓣、 阀座、 高压接口和低压接口， 其特征在于： 所述阀瓣沿其关闭方向延伸设有阀芯，所述阀芯滑动密封贯穿设于阀座中，所述 高压接口设置于阀瓣开启方向的一侧， 所述低压接口设于阀瓣关闭方向的一侧； 所述阀座上对应低压接口位置设有流通口，所述陶芯设有连通流通口与阀瓣的通 径；所述阀瓣沿其丌启方向延伸设有安装有阀芯复位弹簧且滑动密封插配于阀体 中的阀柱， 所述阀柱末端与阀体之间留有大于阀芯开启行程的封闭腔室，所述安 全阀设有连通通道将所述封闭腔室与低压接口连通；所述阀芯穿出阀座的一端设 置有推动阀芯丌启的电磁丌启装置。
2. 根据权利要求 1所述的电磁差动安全阀， 其特征在于： 所述电磁差动安全阀 的是锥阀。
3. 根据权利要求 1所述的电磁差动安全阀， 其特征在于： 所述电磁丌启装置包 括一端与阀芯相对的衔铁，衔铁另一端伸出电磁丌启装置顶部且与之对应设置有 推动衔铁向下运动的顶压装置。
4. 根据权利要求 1所述的电磁差动安全阀， 其特征在于： 所述连接通道是斜向 交叉设置于阀体内部的孔， 孔的一端连通所述封闭腔室， 另一端连通低压接口。
PCT/CN2013/000677 2012-06-08 2013-06-07 电磁差动安全阀 WO2013181933A1 (zh)

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CN104633356A (zh) * 2014-12-10 2015-05-20 珠海格力电器股份有限公司 注氟嘴安全转接装置
CN108443269B (zh) * 2018-03-23 2023-07-28 浙江迦南科技股份有限公司 一种单向限速装置
CN109373023B (zh) * 2018-11-23 2024-02-06 苏州赛谱仪器有限公司 一种动态电磁调节式背压阀装置

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