WO2018223587A1 - 用于核电站的排污阀 - Google Patents

用于核电站的排污阀 Download PDF

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WO2018223587A1
WO2018223587A1 PCT/CN2017/108508 CN2017108508W WO2018223587A1 WO 2018223587 A1 WO2018223587 A1 WO 2018223587A1 CN 2017108508 W CN2017108508 W CN 2017108508W WO 2018223587 A1 WO2018223587 A1 WO 2018223587A1
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hole
valve
inlet
sealing
outlet
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PCT/CN2017/108508
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English (en)
French (fr)
Inventor
邓利平
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四川行之智汇知识产权运营有限公司
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Publication of WO2018223587A1 publication Critical patent/WO2018223587A1/zh

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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
    • 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

Definitions

  • the utility model relates to the technical field of nuclear reactor equipment, in particular to a sewage valve for a nuclear power plant.
  • the evaporator is an important component in the nuclear island of the nuclear reactor.
  • the reactor coolant that is, the fluid in the primary circuit, carries the heat generated by the nuclear reaction of the nuclear reactor into the evaporator, and transfers the heat to the secondary water under the condition of physical isolation.
  • the second-circuit water is heated, steam is generated to drive the steam turbine, etc., and the second-circuit water is condensed into liquid water by the three-circuit water and then added to the second circuit.
  • the secondary circuit water is recycled during the working process, the secondary circuit water still loses severely during the circulation process. Therefore, in the actual working process of the evaporator, it is necessary to continuously replenish water to the secondary circuit.
  • the water quality control of the secondary circuit water in the prior art is very difficult, and the secondary circuit water is often discharged, which is an important means for maintaining the water quality of the second circuit.
  • the above sewage valve faces a serious problem of sealing surface damage during operation, and further improving the structural design of the sewage valve is a technical problem to be solved by those skilled in the art.
  • the sewage valve is facing a serious problem of sealing surface damage during operation, and further improving the structural design of the sewage valve is a problem that needs to be solved by those skilled in the art, and the utility model provides a method for The sewage valve of the nuclear power plant, which can ensure the sealing surface is well protected during the working process.
  • a sewage valve for a nuclear power plant comprising a valve seat and a valve core disposed on the valve seat, the valve seat being provided with an inlet
  • the hole and the outlet hole are provided with a communication hole between the inlet hole and the outlet hole, and the communication hole is provided with a sealing section, the sealing section is located at the end of the communication hole, and the hole section at the front end of the sealing section and the sealing section smoothly transition.
  • the communication hole is a connection hole between the inlet hole and the outlet hole, and after the valve core interacts with the sealing portion on the communication hole, the blocking between the inlet hole and the outlet hole can be realized, and vice versa, the inlet hole and The outlet hole is turned on and the drain valve works.
  • the sealing section by defining the position of the sealing section and the manner in which the sealing section is in contact with the hole section at the front end of the upper sealing section of the communication hole, impurities can enter the communicating hole, and the impurities can be most likely to be under the action of the fluid, so that When the impurity reaches the position of the sealing section, the moving direction of the impurity can be consistent with the flow direction of the fluid as much as possible, so as to reduce the strength of interaction between the impurity and the surface of the corresponding sealing section and the surface of the valve core, and finally realize the effect of protecting the sealing surface. .
  • the sealing section is a tapered hole disposed on the communication hole, and a portion of the valve core for engaging with the sealing section is a tapered section, and a larger diameter end of the tapered hole faces the inlet end of the communication hole.
  • the sealing surface form is convenient to process, and at the same time, the relative position of the valve core and the valve seat is easy to maintain in the state of the sewage valve being cut off, which is favorable for maintaining the cutting performance of the sewage valve.
  • the inlet aperture and the outlet aperture are parallel to each other, the axis of the communication aperture is perpendicular to the axis of the inlet aperture, and the inlet aperture is located above the exit aperture.
  • the impurities residing at the sealing surface can be smoothly discharged under the flushing of the fluid.
  • the two connecting flanges are arranged on the valve seat, and the inlet end of the inlet hole and the outlet end of the outlet hole are respectively connected with a piece.
  • the flange is connected and the sealing faces on the connecting flange are all grooved faces.
  • the communication hole is a connection hole between the inlet hole and the outlet hole, and after the valve core interacts with the sealing portion on the communication hole, the blocking between the inlet hole and the outlet hole can be realized, and vice versa, the inlet hole and Export The hole is turned on and the drain valve works.
  • the sealing section by defining the position of the sealing section and the manner in which the sealing section is in contact with the hole section at the front end of the upper sealing section of the communication hole, impurities can enter the communicating hole, and the impurities can be most likely to be under the action of the fluid, so that When the impurity reaches the position of the sealing section, the moving direction of the impurity can be consistent with the flow direction of the fluid as much as possible, so as to reduce the strength of interaction between the impurity and the surface of the corresponding sealing section and the surface of the valve core, and finally realize the effect of protecting the sealing surface. .
  • FIG. 1 is a cross-sectional view showing the structure of a sewage valve for a nuclear power plant according to the present invention.
  • the numbers in the figure are: 1, valve seat, 2, inlet hole, 3, outlet hole, 4, valve core, 5, sealing section, 6, connecting hole, 7, tapered section.
  • the sewage valve for a nuclear power plant includes a valve seat 1 and a valve core 4 disposed on the valve seat 1 .
  • the valve seat 1 is provided with an inlet hole 2 and an outlet hole 3 , and the inlet hole 2 and the outlet A communication hole 6 is disposed between the holes 3, and the communication hole 6 is provided with a sealing portion 5 at the end of the communication hole 6, and the hole portion at the front end of the sealing portion 5 smoothly transitions with the sealing portion 5.
  • the communication hole 6 is a connection hole between the inlet hole 2 and the outlet hole 3. After the valve core 4 interacts with the sealing portion 5 of the communication hole 6, the connection between the inlet hole 2 and the outlet hole 3 can be realized. Blocking, on the contrary, the inlet hole 2 and the outlet hole 3 are electrically connected, and the drain valve operates.
  • the impurities can enter the communication hole 6, and the impurities can be most likely in the fluid.
  • the moving direction of the impurities can be consistent with the flow direction of the fluid as much as possible to reduce the impurities and the corresponding sealing.
  • the purpose of the strength of the interaction between the surface of the segment 5 and the surface of the spool 4 ultimately achieves the effect of protecting the sealing surface.
  • the embodiment is further defined on the basis of the first embodiment: the sealing section 5 is a tapered hole disposed on the communication hole 6 , and the valve core 4 is used for mating with the sealing section 5 .
  • the portion is a tapered section 7, and the larger diameter end of the tapered hole faces the inlet end of the communication hole 6.
  • the sealing surface form is convenient to process, and at the same time, the relative position of the valve core 4 and the valve seat 1 is conveniently maintained in the cut-off state of the sewage valve, which is favorable for maintaining the cutting performance of the sewage valve.
  • the inlet aperture 2 and the outlet aperture 3 are parallel to each other, the axis of the communication aperture 6 is perpendicular to the axis of the inlet aperture 2, and the inlet aperture 2 is located above the exit aperture 3.
  • the impurities residing at the sealing surface can be smoothly discharged under the flushing of the fluid.
  • the embodiment is further defined on the basis of any one of the technical solutions provided by any one of the above embodiments: in order to facilitate the connection between the sewage valve and the pipe sections on both sides, and at the same time ensure the reliability of the connection surface sealing,
  • the two connecting flanges are arranged on the valve seat 1.
  • the inlet end of the inlet hole 2 and the outlet end of the outlet hole 3 are respectively connected with a connecting flange, and the sealing faces on the connecting flange are all grooved surfaces.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)

Abstract

公开了一种用于核电站的排污阀，包括阀座(1)及设置于阀座(1)上的阀芯(4)，阀座(1)上设置有入口孔(2)及出口孔(3)，入口孔(2)与出口孔(3)之间设置有连通孔(6)，连通孔(6)上设置有密封段(5)，密封段(5)位于连通孔(6)的末端，且密封段(5)前端的孔段与密封段(5)平滑过渡。该排污阀在工作过程中能够使得密封面得到良好的保护。

Description

用于核电站的排污阀 技术领域
本实用新型涉及核反应堆设备技术领域，特别是涉及一种用于核电站的排污阀。
背景技术
蒸发器是核反应堆核岛中的重要部件，反应堆冷却剂，即一回路流程中的流体，其携带核反应堆核反应产生的热量进入到蒸发器中，在实体隔离的条件下将热量传递给二回路水，二回路水被加热后，生成蒸汽以驱动汽轮机等，二回路水再由三回路水冷凝成液态水后补充到二回路中。虽然二回路水在工作过程中被循环利用，但二回路水在循环过程中仍然损失严重，这样，蒸发器实际工作过程中，需要不断的向二回路中补充水。
因为二回路水的损失问题，现有技术中二回路水的水质控制非常困难，经常对二回路水进行排污，是保持二回路水水质的重要手段。这就使得控制排污管通断的排污阀对核反应堆的正常运行非常重要。然而，以上排污阀在运行过程中面临着严重的密封面损伤问题，进一步改进排污阀的结构设计，是本领域技术人员亟待解决的技术问题。
实用新型内容
针对现有技术中排污阀在运行过程中面临着严重的密封面损伤问题，进一步改进排污阀的结构设计，是本领域技术人员亟待解决的技术问题的问题，本实用新型提供了一种用于核电站的排污阀，该排污阀在工作过程中能够使得密封面得到良好的保护。
本实用新型提供的用于核电站的排污阀通过以下技术要点来解决问题：用于核电站的排污阀，包括阀座及设置于阀座上的阀芯，所述阀座上设置有入口 孔及出口孔，入口孔与出口孔之间设置有连通孔，所述连通孔上设置有密封段，所述密封段位于连通孔的末端，且密封段前端的孔段与密封段平滑过渡。
本结构中，所述连通孔即为入口孔与出口孔的连接孔，阀芯与连通孔上密封段相互作用后，可实现对入口孔与出口孔之间的阻断，反之，入口孔与出口孔导通，排污阀工作。本结构中，通过限定密封段的位置及密封段与连通孔上上密封段前端的孔段的相接方式，可使得杂质进入到连通孔中后，杂质能够最大可能在流体的作用下，使得杂质在到达密封段位置处时，杂质的运动方向能够尽可能与流体的流动方向一致，以达到减轻杂质与相应密封段表面及阀芯表面相互作用的强度的目的，最终实现保护密封面的效果。
更进一步的技术方案为：
所述密封段为设置于连通孔上的锥形孔，所述阀芯上用于与密封段配合的部分为锥形段，所述锥形孔直径较大的一端朝向连通孔的入口端。本密封面形式加工方便，同时，排污阀截断状态下，阀芯与阀座的相对位置便于保持，利于保持排污阀保持截断性能。
作为一种便于加工的实现方案，所述入口孔与出口孔相互平行，连通孔的轴线与入口孔的轴线垂直，且入口孔位于出口孔的上方。本方案中，在排污阀开度变大的过程中，驻留在密封面处的杂质可顺利在流体的冲刷下被排出。
为便于实现排污阀与两侧管段的连接，同时保证连接面密封的可靠性，还包括设置于阀座上的两片连接法兰，入口孔的入口端及出口孔的出口端分别连接有一片连接法兰，且连接法兰上的密封面均为榫槽面。
本实用新型具有以下有益效果：
本结构中，所述连通孔即为入口孔与出口孔的连接孔，阀芯与连通孔上密封段相互作用后，可实现对入口孔与出口孔之间的阻断，反之，入口孔与出口 孔导通，排污阀工作。本结构中，通过限定密封段的位置及密封段与连通孔上上密封段前端的孔段的相接方式，可使得杂质进入到连通孔中后，杂质能够最大可能在流体的作用下，使得杂质在到达密封段位置处时，杂质的运动方向能够尽可能与流体的流动方向一致，以达到减轻杂质与相应密封段表面及阀芯表面相互作用的强度的目的，最终实现保护密封面的效果。
附图说明
图1是本实用新型所述的用于核电站的排污阀一个具体实施例的结构剖视图。图中的编号依次为：1、阀座，2、入口孔，3、出口孔，4、阀芯，5、密封段，6、连通孔，7、锥形段。
具体实施方式
下面结合实施例对本实用新型作进一步的详细说明，但是本实用新型的结构不仅限于以下实施例。
实施例1：
如图1所示，用于核电站的排污阀，包括阀座1及设置于阀座1上的阀芯4，所述阀座1上设置有入口孔2及出口孔3，入口孔2与出口孔3之间设置有连通孔6，所述连通孔6上设置有密封段5，所述密封段5位于连通孔6的末端，且密封段5前端的孔段与密封段5平滑过渡。
本结构中，所述连通孔6即为入口孔2与出口孔3的连接孔，阀芯4与连通孔6上密封段5相互作用后，可实现对入口孔2与出口孔3之间的阻断，反之，入口孔2与出口孔3导通，排污阀工作。本结构中，通过限定密封段5的位置及密封段5与连通孔6上上密封段5前端的孔段的相接方式，可使得杂质进入到连通孔6中后，杂质能够最大可能在流体的作用下，使得杂质在到达密封段5位置处时，杂质的运动方向能够尽可能与流体的流动方向一致，以达到减轻杂质与相应密封 段5表面及阀芯4表面相互作用的强度的目的，最终实现保护密封面的效果。
实施例2：
如图1所示，本实施例在实施例1的基础上作进一步限定：所述密封段5为设置于连通孔6上的锥形孔，所述阀芯4上用于与密封段5配合的部分为锥形段7，所述锥形孔直径较大的一端朝向连通孔6的入口端。本密封面形式加工方便，同时，排污阀截断状态下，阀芯4与阀座1的相对位置便于保持，利于保持排污阀保持截断性能。
作为一种便于加工的实现方案，所述入口孔2与出口孔3相互平行，连通孔6的轴线与入口孔2的轴线垂直，且入口孔2位于出口孔3的上方。本方案中，在排污阀开度变大的过程中，驻留在密封面处的杂质可顺利在流体的冲刷下被排出。实施例3：
如图1所示，本实施例在以上任意一个实施例提供的任意一个技术方案的基础上作进一步限定：为便于实现排污阀与两侧管段的连接，同时保证连接面密封的可靠性，还包括设置于阀座1上的两片连接法兰，入口孔2的入口端及出口孔3的出口端分别连接有一片连接法兰，且连接法兰上的密封面均为榫槽面。
以上内容是结合具体的优选实施方式对本实用新型作的进一步详细说明，不能认定本实用新型的具体实施方式只局限于这些说明。对于本实用新型所属技术领域的普通技术人员来说，在不脱离本实用新型的技术方案下得出的其他实施方式，均应包含在本实用新型的保护范围内。

Claims (4)

  1. 用于核电站的排污阀，包括阀座(1)及设置于阀座(1)上的阀芯(4)，所述阀座(1)上设置有入口孔(2)及出口孔(3)，入口孔(2)与出口孔(3)之间设置有连通孔(6)，所述连通孔(6)上设置有密封段(5)，其特征在于，所述密封段(5)位于连通孔(6)的末端，且密封段(5)前端的孔段与密封段(5)平滑过渡。
  2. 根据权利要求1所述的用于核电站的排污阀，其特征在于，所述密封段(5)为设置于连通孔(6)上的锥形孔，所述阀芯(4)上用于与密封段(5)配合的部分为锥形段(7)，所述锥形孔直径较大的一端朝向连通孔(6)的入口端。
  3. 根据权利要求1所述的用于核电站的排污阀，其特征在于，所述入口孔(2)与出口孔(3)相互平行，连通孔(6)的轴线与入口孔(2)的轴线垂直，且入口孔(2)位于出口孔(3)的上方。
  4. 根据权利要求1至3中任意一项所述的用于核电站的排污阀，其特征在于，还包括设置于阀座(1)上的两片连接法兰，入口孔(2)的入口端及出口孔(3)的出口端分别连接有一片连接法兰，且连接法兰上的密封面均为榫槽面。
PCT/CN2017/108508 2017-06-09 2017-10-31 用于核电站的排污阀 WO2018223587A1 (zh)

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CN1713131A (zh) * 2004-06-14 2005-12-28 乐金电子(天津)电器有限公司 多种音发生装置及其方法
CN204253893U (zh) * 2014-11-26 2015-04-08 苏州中新动力科技股份有限公司 一种火力发电厂排污用高温高压截止阀
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CN205639656U (zh) * 2016-04-06 2016-10-12 上海电站阀门厂有限公司 一种排污疏水阀
CN107013692A (zh) * 2017-06-09 2017-08-04 四川省守望信息科技有限责任公司 一种核岛用排污阀
CN107013690A (zh) * 2017-06-09 2017-08-04 四川省守望信息科技有限责任公司 用于核电站的排污阀

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