WO2018223594A1 - 用于核反应堆蒸发器的排污阀 - Google Patents

用于核反应堆蒸发器的排污阀 Download PDF

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Publication number
WO2018223594A1
WO2018223594A1 PCT/CN2017/109608 CN2017109608W WO2018223594A1 WO 2018223594 A1 WO2018223594 A1 WO 2018223594A1 CN 2017109608 W CN2017109608 W CN 2017109608W WO 2018223594 A1 WO2018223594 A1 WO 2018223594A1
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hole
valve
boss
communication hole
inlet
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PCT/CN2017/109608
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English (en)
French (fr)
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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 WO2018223594A1 publication Critical patent/WO2018223594A1/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
    • 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

Definitions

  • the utility model relates to the technical field of nuclear reactor equipment, in particular to a sewage valve for a nuclear reactor evaporator.
  • 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 reactor evaporator, which can ensure the sealing surface is well protected during the working process.
  • a sewage valve for a nuclear reactor evaporator comprising a valve seat and a valve core disposed on the valve seat, An inlet hole and an outlet hole are disposed on the valve seat, and a communication hole is disposed between the inlet hole and the outlet hole, the communication hole is provided with a sealing section, and the valve core is further provided with an annular boss, The boss is opposite to the entrance end of the communication hole, the boss is located outside the entrance end of the communication hole, and the projection of the communication hole toward the boss falls within the edge of the edge of the boss;
  • the distance from the boss to the communication hole is less than or equal to the distance of the sealing segment from the valve core
  • the diameter of the inlet end of the communication hole is larger than the diameter of the sealing section.
  • the sewage valve of the nuclear reactor evaporator mostly adopts a shut-off valve, so that when the sewage valve disposed at the bottom of the second-circuit water is operated, the particulate impurities in the secondary circuit water block the sealing surface, and the sealing surface is closed. Or the high-speed collision of the particulate impurities and the frictional sealing surface caused the sealing surface to be scratched, which will cause the sealing performance of the sealing surface to be damaged.
  • 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 valve core is further provided with an annular boss, the boss is facing the inlet end of the communication hole, the boss is located outside the entrance end of the communication hole, and the projection of the communication hole toward the boss falls on the convex
  • the inner region of the edge of the table, and the distance between the boss and the communication hole is less than or equal to the distance of the sealing segment from the valve core, and the purpose is to achieve the following: when the sewage valve is opened, the boss and the end face of the inlet end of the communication hole have a gap for the fluid to flow into the communication hole from the inlet hole, and by defining a relationship between a width of the gap and a distance from the sealing segment to the spool, corresponding to a front end of the sealing surface formed by the spool and the sealing section Impurity filter gap: When the size of the impurity can pass through the filter gap, impurities can enter the flow area between the valve core and the sealing section.
  • the size of the impurity is equal to the distance from the spool to the sealing section or impurities.
  • the size is smaller than the distance from the spool to the sealing section.
  • the impurities will not cause serious damage to the surface of the valve core and/or the sealing section; when the size of the impurity is larger than the gap value, the impurity It is not possible to enter the communication hole, but in the process of further increasing the opening degree of the subsequent drain valve, Impurities can also be smoothly discharged; when the drain valve is closed, since the impurities can only reside more in the boss position, at this time, if the drain valve is not properly closed, the impurities can only cause the position of the boss.
  • the blowdown valve provided in this case can make the sealing surface well protected during the working process.
  • the sealing section is a tapered hole disposed on the communication hole, and the valve core is used for cooperating with the sealing section.
  • the portion is a tapered section, and the larger diameter end of the tapered hole faces the inlet end of the communication hole.
  • the moving direction of the impurities can be consistent with the flow direction of the fluid as much as possible, so as to reduce the strength of the interaction between the impurities and the surface of the corresponding sealing section and the surface of the valve core, thereby achieving the effect of protecting the sealing surface.
  • the sealing section is located at the end of the communication hole, and the hole section at the front end of the sealing section smoothly transitions with the sealing section.
  • the impurities remaining at the end of the inlet hole can be more conveniently discharged from the sewage valve, the inlet hole and the outlet hole are parallel to each other, and the axis of the communication hole is perpendicular to the axis of the inlet hole, and The inlet aperture is located above the exit aperture.
  • 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 valve core is further provided with an annular boss, the boss is facing the inlet end of the communication hole, the boss is located outside the entrance end of the communication hole, and the projection of the communication hole toward the boss falls on the convex Edge of the table
  • the inner region at the same time, the distance of the boss from the communication hole is less than or equal to the distance of the sealing segment from the valve core, and aims to achieve the following purpose: when the sewage valve is opened, there is a gap between the boss and the end face of the inlet end of the communication hole, The gap is used for the fluid to flow into the communication hole from the inlet hole, and by defining the relationship between the width of the gap and the distance of the sealing section from the spool, the impurity filtering gap is arranged at the front end of the sealing surface composed of the valve core and the sealing section.
  • the impurities can enter the flow area between the valve core and the sealing section.
  • the size of the impurity is equal to the distance from the valve core to the sealing section or the impurity is smaller than the size of the impurity. The distance from the spool to the sealing section.
  • the impurities do not cause serious damage to the surface of the valve core and/or the sealing section; when the size of the impurity is larger than the gap value, the impurities cannot enter the communication hole, and In the process of further increasing the opening degree of the subsequent drain valve, the above impurities can also be smoothly discharged; when the drain valve is closed, since the impurities are only likely to reside more in the boss Position, at this time, if it is found that the drain valve cannot be closed normally, the impurities can only cause the corresponding surface at the position of the boss to be damaged, that is, when there is unforeseen impurities in the drain valve, it is only necessary to further increase
  • the opening degree of the drain valve allows it to wash for a certain period of time. After the impurities are discharged, the impurity discharge operation can be smoothly completed, and the above structure is improved, and the sealing surface of the drain valve is not damaged.
  • the blowdown valve provided in this case can make the sealing surface well protected during the working process.
  • Figure 1 is a cross-sectional view showing the structure of a drain valve for a nuclear reactor evaporator according to the present invention.
  • valve seat 1, valve seat, 2, inlet hole, 3, outlet hole, 4, valve core, 5, sealing section, 6, connecting hole, 7, tapered section, 8, boss.
  • the sewage valve for the nuclear reactor evaporator 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
  • a communication hole 6 is disposed between the outlet hole 3 and the sealing hole 5 is disposed on the valve core 4
  • the valve body 4 is further provided with an annular boss 8 which faces the communication hole The entrance end of the sixth end, the boss 8 is located outside the entrance end of the communication hole 6, and the projection of the communication hole 6 toward the boss 8 falls within the edge of the edge of the boss 8;
  • the distance between the boss 8 and the communication hole 6 is less than or equal to the distance of the sealing segment 5 from the valve core 4;
  • the diameter of the inlet end of the communication hole 6 is larger than the diameter of the sealing section 5.
  • the sewage valve of the nuclear reactor evaporator mostly adopts a shut-off valve, so that when the sewage valve disposed at the bottom of the second-circuit water is operated, the particulate impurities in the secondary circuit water block the sealing surface, and the sealing surface is closed. Or the high-speed collision of the particulate impurities and the frictional sealing surface caused the sealing surface to be scratched, which will cause the sealing performance of the sealing surface to be damaged.
  • 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 valve body 4 is further provided with an annular boss 8 which faces the inlet end of the communication hole 6, and the boss 8 is located outside the inlet end of the communication hole 6, and the communication hole 6 faces
  • the projection of the boss 8 falls within the inner region of the edge of the boss 8, while the distance of the boss 8 from the communication hole 6 is less than or equal to the distance of the sealing segment 5 from the spool 4, aiming at the following purpose: the drain valve is opened When there is a gap between the boss 8 and the end face of the inlet end of the communication hole 6, the above gap is used for the fluid to flow into the communication hole 6 from the inlet hole 2, and by defining the width of the gap and the distance from the sealing segment 5 to the spool 4.
  • the relationship is equivalent to providing an impurity filtering gap at the front end of the sealing surface composed of the spool 4 and the sealing section 5: when the size of the impurity can pass through the filtering gap, impurities can enter between the spool 4 and the sealing section 5 In the circulation area, at this time, the size of the impurity is equal to the distance from the spool 4 to the sealing section 5 or the size of the impurity is smaller than the spool 4 The distance of the sealing section 5, at this time, the impurities do not cause serious damage to the surface of the valve body 4 and/or the sealing section 5; when the size of the impurity is larger than the gap value, the impurities cannot enter the communication hole 6, In the process of further increasing the opening degree of the subsequent blowdown valve, the above impurities can be smoothly discharged; when the drain valve is closed, since the impurities can only reside more at the position of the boss 8, at this time, if the drain valve is found It can not be closed normally.
  • the impurity can only cause the corresponding surface at the position of the boss 8 to be damaged. That is, when there is unforeseen impurities in the drain valve, it is only necessary to further increase the opening degree of the drain valve to wash it. After a certain period of time, the impurities can be smoothly discharged after the impurities are discharged, and the above structure is not improved, and the sealing surface of the drain valve is not damaged.
  • blowdown valve provided in this case can make the sealing surface well protected during the working process.
  • Example 2
  • the embodiment is further defined on the basis of Embodiment 1 as an implementation manner in which the relative position of the valve body 4 and the valve seat 1 is easily maintained in a state in which the sewage valve is cut off, the sealing section. 5 is a tapered hole provided in the communication hole 6, and a portion of the valve body 4 for engaging with the sealing portion 5 is a tapered section 7, and a larger diameter end of the tapered hole faces the inlet of the communication hole 6. end.
  • the moving direction of the impurities can be consistent with the flow direction of the fluid as much as possible, so as to reduce the strength of the interaction between the impurities and the surface of the corresponding sealing section 5 and the surface of the valve core 4, thereby achieving the effect of protecting the sealing surface.
  • the sealing section 5 is located at the end of the communication hole 6, and the hole section at the front end of the sealing section 5 smoothly transitions with the sealing section 5.
  • the impurities remaining at the end of the inlet hole 2 can be more conveniently discharged from the sewage valve, the inlet hole 2 and the outlet hole 3 are parallel to each other, and the axis of the communication hole 6 and the inlet hole 2 The axis of the axis is vertical and the inlet aperture 2 is located above the outlet aperture 3.
  • the base of any one of the technical solutions provided by any one of the above embodiments is used in this embodiment. Further, it is further defined: in order to facilitate the connection between the sewage valve and the pipe sections on both sides, and to ensure the reliability of the sealing of the joint surface, the two connecting flanges disposed on the valve seat 1 and the inlet end and the outlet of the inlet hole 2 are further included. A connecting flange is respectively connected to the outlet end of the hole 3, and the sealing faces on the connecting flange are all grooved surfaces.

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

Abstract

一种用于核反应堆蒸发器的排污阀，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），所述阀芯（4）上还设置有呈环状的凸台（8），所述凸台（8）正对连通孔（6）的入口端，凸台（8）位于连通孔（6）入口端的外侧，连通孔（6）朝凸台（8）的投影落在凸台（8）的边缘以内区域；所述凸台（8）距连通孔（6）的距离小于或等于密封段（5）距阀芯（4）的距离；连通孔（6）入口端的直径大于密封段（5）的直径。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

用于核反应堆蒸发器的排污阀 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反应堆蒸发器的排污阀。
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反应堆蒸发器的排污阀，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反应堆蒸发器的排污阀通过以下技术要点来解决问题：用于核反应堆蒸发器的排污阀，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，所述阀芯上还设置有呈环状的凸台，所述凸台正对连通孔的入口端，凸台位于连通孔入口端的外侧，连通孔朝凸台的投影落在凸台的边缘以内区域；
所述凸台距连通孔的距离小于或等于密封段距阀芯的距离；
连通孔入口端的直径大于密封段的直径。
现有技术中，核反应堆蒸发器的排污阀多采用截止阀，这样，在设置于二回路水底部的排污阀工作时，二回路水中的颗粒杂质因为堵塞密封面，在密封面关闭的过程中，或是颗粒杂质高速碰撞剧烈摩擦密封面造成密封面划伤，均会造成密封面的密封性能遭到破坏。
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，设置为阀芯上还设置有呈环状的凸台，所述凸台正对连通孔的入口端，凸台位于连通孔入口端的外侧，连通孔朝凸台的投影落在凸台的边缘以内区域，同时，所述凸台距连通孔的距离小于或等于密封段距阀芯的距离，旨在实现以下目的：排污阀打开时，凸台与连通孔入口端的端面之间具有间隙，以上间隙用于流体由入口孔中流入连通孔中，且通过限定所述间隙的宽度与密封段距阀芯距离的关系，相当于在阀芯与密封段组成的密封面的前端设置有杂质过滤间隙：当杂质的大小能够通过所述过滤间隙时，杂质能够进入到阀芯与密封段之间的流通区域内，此时，由于杂质的大小与阀芯到密封段的距离相等或杂质的大小小于阀芯到密封段的距离，此时，杂质不会对阀芯和/或密封段的表面造成严重的损伤；当杂质的尺寸大于所述间隙数值时，杂质不能够进入到连通孔中，而在后续排污阀开度进一步增大的过程中，以上 杂质也能够被顺利排出；在排污阀关闭时，由于杂质只可能较多的驻留在凸台位置，此时，若发现排污阀不能正常关闭，此时杂质也只能造成凸台位置处的相应表面被损伤，即在本排污阀中驻留有不可预见的杂质时，只需要进一步加大排污阀的开度让其冲刷一定时间，待杂质排出后，即可顺利的完成杂质排出动作，而通过以上结构改进，此过程不会造成排污阀的密封面遭到破坏。
综上，本案提供的排污阀在工作过程中能够使得密封面得到良好的保护。
更进一步的技术方案为：
作为一种在排污阀截断状态下，阀芯与阀座的相对位置便于保持的实现方式，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。
为使得杂质在通过密封段时，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，达到保护密封面的效果，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。
作为一种便于加工、驻留在入口孔末端的杂质能够更为方便的由排污阀中排出的实现方案，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。
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，设置为阀芯上还设置有呈环状的凸台，所述凸台正对连通孔的入口端，凸台位于连通孔入口端的外侧，连通孔朝凸台的投影落在凸台的边缘 以内区域，同时，所述凸台距连通孔的距离小于或等于密封段距阀芯的距离，旨在实现以下目的：排污阀打开时，凸台与连通孔入口端的端面之间具有间隙，以上间隙用于流体由入口孔中流入连通孔中，且通过限定所述间隙的宽度与密封段距阀芯距离的关系，相当于在阀芯与密封段组成的密封面的前端设置有杂质过滤间隙：当杂质的大小能够通过所述过滤间隙时，杂质能够进入到阀芯与密封段之间的流通区域内，此时，由于杂质的大小与阀芯到密封段的距离相等或杂质的大小小于阀芯到密封段的距离，此时，杂质不会对阀芯和/或密封段的表面造成严重的损伤；当杂质的尺寸大于所述间隙数值时，杂质不能够进入到连通孔中，而在后续排污阀开度进一步增大的过程中，以上杂质也能够被顺利排出；在排污阀关闭时，由于杂质只可能较多的驻留在凸台位置，此时，若发现排污阀不能正常关闭，此时杂质也只能造成凸台位置处的相应表面被损伤，即在本排污阀中驻留有不可预见的杂质时，只需要进一步加大排污阀的开度让其冲刷一定时间，待杂质排出后，即可顺利的完成杂质排出动作，而通过以上结构改进，此过程不会造成排污阀的密封面遭到破坏。
综上，本案提供的排污阀在工作过程中能够使得密封面得到良好的保护。
附图说明
图1是本实用新型所述的用于核反应堆蒸发器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，8、凸台。
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，用于核反应堆蒸发器的排污阀，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，所述阀芯4上还设置有呈环状的凸台8，所述凸台8正对连通孔6的入口端，凸台8位于连通孔6入口端的外侧，连通孔6朝凸台8的投影落在凸台8的边缘以内区域；
所述凸台8距连通孔6的距离小于或等于密封段5距阀芯4的距离；
连通孔6入口端的直径大于密封段5的直径。
现有技术中，核反应堆蒸发器的排污阀多采用截止阀，这样，在设置于二回路水底部的排污阀工作时，二回路水中的颗粒杂质因为堵塞密封面，在密封面关闭的过程中，或是颗粒杂质高速碰撞剧烈摩擦密封面造成密封面划伤，均会造成密封面的密封性能遭到破坏。
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，设置为阀芯4上还设置有呈环状的凸台8，所述凸台8正对连通孔6的入口端，凸台8位于连通孔6入口端的外侧，连通孔6朝凸台8的投影落在凸台8的边缘以内区域，同时，所述凸台8距连通孔6的距离小于或等于密封段5距阀芯4的距离，旨在实现以下目的：排污阀打开时，凸台8与连通孔6入口端的端面之间具有间隙，以上间隙用于流体由入口孔2中流入连通孔6中，且通过限定所述间隙的宽度与密封段5距阀芯4距离的关系，相当于在阀芯4与密封段5组成的密封面的前端设置有杂质过滤间隙：当杂质的大小能够通过所述过滤间隙时，杂质能够进入到阀芯4与密封段5之间的流通区域内，此时，由于杂质的大小与阀芯4到密封段5的距离相等或杂质的大小小于阀芯4到 密封段5的距离，此时，杂质不会对阀芯4和/或密封段5的表面造成严重的损伤；当杂质的尺寸大于所述间隙数值时，杂质不能够进入到连通孔6中，而在后续排污阀开度进一步增大的过程中，以上杂质也能够被顺利排出；在排污阀关闭时，由于杂质只可能较多的驻留在凸台8位置，此时，若发现排污阀不能正常关闭，此时杂质也只能造成凸台8位置处的相应表面被损伤，即在本排污阀中驻留有不可预见的杂质时，只需要进一步加大排污阀的开度让其冲刷一定时间，待杂质排出后，即可顺利的完成杂质排出动作，而通过以上结构改进，此过程不会造成排污阀的密封面遭到破坏。
综上，本案提供的排污阀在工作过程中能够使得密封面得到良好的保护。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：作为一种在排污阀截断状态下，阀芯4与阀座1的相对位置便于保持的实现方式，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。
为使得杂质在通过密封段5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，达到保护密封面的效果，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。
作为一种便于加工、驻留在入口孔2末端的杂质能够更为方便的由排污阀中排出的实现方案，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。
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 (5)

  1. 用于核反应堆蒸发器的排污阀，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，所述阀芯(4)上还设置有呈环状的凸台(8)，所述凸台(8)正对连通孔(6)的入口端，凸台(8)位于连通孔(6)入口端的外侧，连通孔(6)朝凸台(8)的投影落在凸台(8)的边缘以内区域；
    所述凸台(8)距连通孔(6)的距离小于或等于密封段(5)距阀芯(4)的距离；
    连通孔(6)入口端的直径大于密封段(5)的直径。
  2. 根据权利要求1所述的用于核反应堆蒸发器的排污阀，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2所述的用于核反应堆蒸发器的排污阀，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。
  4. 根据权利要求1所述的用于核反应堆蒸发器的排污阀，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。
  5. 根据权利要求1至4中任意一项所述的用于核反应堆蒸发器的排污阀，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/CN2017/109608 2017-06-09 2017-11-07 用于核反应堆蒸发器的排污阀 WO2018223594A1 (zh)

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