阅读说明：本技术 大口径高温液态金属钠阀 (Large-caliber high-temperature liquid metal sodium valve ) 是由 刘平 吕明宇 高志岗 杨红义 吴辉 余华金 李军业 胡金辉 王兰群 严新虹 邓永 于 2018-06-04 设计创作，主要内容包括：本发明属于阀门,特别是高温下运行的阀门,其介质为液体金属钠,具体涉及一种适用于介质为液体金属钠且在高温运行工况下能正常启闭的阀门。一种大口径高温液态金属钠阀,其中,包括设置在管道上的阀体,阀体上设置阀盖,阀盖上设置支架,在支架外设置固定环,在支架顶端设置轴承箱,轴承箱的上方设置电动装置,在轴承箱的下方设置位置指示器。本发明的显著优点是：最大限度地简化了结构,使整体结构紧凑,并减少了部件之间的连接,有效地降低了重量,提高了整体的抗震性能。(The invention belongs to a valve, in particular to a valve which runs at high temperature, the medium of which is liquid metal sodium, and particularly relates to a valve which is suitable for being opened and closed normally under the working condition of high-temperature running and has the medium of liquid metal sodium. The utility model provides a heavy-calibre high temperature liquid metal sodium valve, wherein, including setting up the valve body on the pipeline, set up the valve gap on the valve body, set up the support on the valve gap, set up solid fixed ring outside the support, set up the bearing box on the support top, the top of bearing box sets up electric actuator, sets up position indicator in the below of bearing box. The invention has the following remarkable advantages: the structure is simplified to the maximum extent, the whole structure is compact, the connection among parts is reduced, the weight is effectively reduced, and the whole anti-seismic performance is improved.)

1. A large-caliber high-temperature liquid metal sodium valve is characterized in that: the valve comprises a valve body (1) arranged on a pipeline, a valve cover (2) is arranged on the valve body (1), a support (3) is arranged on the valve cover (2), a fixing ring (4) is arranged outside the support (3), a bearing box (6) is arranged at the top end of the support (3), an electric device (7) is arranged above the bearing box (6), and a position indicator (5) is arranged below the bearing box (6).

2. A large bore high temperature liquid metal sodium valve as claimed in claim 1, wherein: the support (3) is used for fixedly connecting the valve cover (2) with the bearing box (6), and the valve cover is used as a pressure boundary and plays a role in freezing and sealing.

3. A large bore high temperature liquid metal sodium valve as claimed in claim 2, wherein: the support (3) comprises three or more than three support legs.

4. A large bore high temperature liquid metal sodium valve as claimed in claim 3, wherein: the fixing ring (4) is welded on the supporting leg of the support (3) and used for increasing the strength of the support (3), so that the weight of the support is reduced, the rigidity of the support is met, the weight is reduced, the center of the whole valve is downward, and the shock resistance of the valve is improved.

Technical Field

The invention belongs to a valve, in particular to a valve which runs at high temperature, the medium of which is liquid metal sodium, and particularly relates to a valve which is suitable for being opened and closed normally under the working condition of high-temperature running and has the medium of liquid metal sodium.

Background

The high-temperature nuclear sodium valve is mainly used for a sodium loop system and mainly has the function of effectively communicating and blocking fluid medium sodium in a pipeline. Generally, the sodium valve has low working pressure and high working temperature (up to 505 ℃), and the chemical property of the conveyed medium sodium is extremely active, so that stricter requirements are provided for the structural design of the valve, particularly the sealing performance. DN300 large caliber

The high-temperature liquid metal sodium valve is used as a locking mechanism on an inlet pipeline and an outlet pipeline of the steam generator unit, when the steam generator is unsealed and a sodium water accident occurs, the sodium valve is closed to rapidly cut off sodium circulation in the two loops, so that the steam generator is isolated, and the stability of a system and the safe operation of the steam generator are ensured.

Disclosure of Invention

The invention aims to provide a valve which runs at high temperature, realizes the function of normally opening and closing under the working condition of high-temperature running when the medium is liquid metal sodium, and realizes a freezing sealing structure at a valve rod by utilizing the morphological characteristics of the medium.

The invention is realized by the following steps: the utility model provides a heavy-calibre high temperature liquid metal sodium valve, wherein, including setting up the valve body on the pipeline, set up the valve gap on the valve body, set up the support on the valve gap, set up solid fixed ring outside the support, set up the bearing box on the support top, the top of bearing box sets up electric actuator, sets up position indicator in the below of bearing box.

The large-caliber high-temperature liquid metal sodium valve comprises a valve cover, a valve seat, a valve cover and a support.

The large-caliber high-temperature liquid metal sodium valve comprises a support, wherein the support comprises three or more support legs.

According to the large-caliber high-temperature liquid metal sodium valve, the fixing ring is welded on the support leg of the support and used for increasing the strength of the support, so that the weight of the support is reduced, the rigidity of the support is met, the weight is reduced, the whole center of the valve is downward, and the shock resistance of the valve is improved.

The invention has the following remarkable advantages: the valve body adopts an integral forge welding structure, the structure compactness of a forge piece is good, and the strength of the valve body is effectively ensured; the sealing adopts the sodium freezing as the main sealing and the filling as the auxiliary sealing; the upper flange and the lower flange of the bracket are connected by three stand columns, and the outer sides of the three stand columns are fixed by fixing rings in a spot welding manner, so that the rigidity of the bracket is met while the weight of the bracket is reduced, the purpose of reducing the weight is to enable the center of the whole valve to be downward, and the shock resistance of the valve is improved; a pressure sensor is arranged at the filler, and when a medium leaks out through the filler, an alarm can be given in time; the temperature sensor is arranged at the bearing box, so that the temperature can be increased if a fault occurs, and the control room can obtain information in time.

the middle cavity adopts a gasket-free structure, the planar seal is used as the first seal to reduce the pressure at the lip edge welding position, and the lip edge welding is used for keeping the integrity of the pressure boundary.

The sodium refrigeration seal is subjected to simulation analysis and calculation through software, the number, the spacing and the arrangement of the cooling fins are determined, and the sodium refrigeration is used as a main seal to ensure the sealing integrity of the valve.

The packing sealing structure comprises four circles of flexible graphite packing in the middle and stainless steel wire flexible graphite packing clamped at two ends respectively. In this valve structure, the packing seal serves only as a secondary seal.

The design simplifies the structure to the maximum extent, makes the whole structure compact, reduces the connection between the parts, effectively reduces the weight and improves the whole anti-seismic performance.

Drawings

FIG. 1 is a schematic diagram of a large-caliber high-temperature liquid metal sodium valve according to the present invention;

FIG. 2 is a structure diagram of DN300 large-caliber high-temperature liquid metal sodium valve;

In the figure: 1. the valve comprises a valve body, a valve cover 2, a support 3, a fixing ring 4, a position indicator 5, a bearing box 6 and an electric device 7.

Detailed Description

As shown in attached figures 1-2, the large-caliber high-temperature liquid metal sodium valve comprises a valve body 1 arranged on a pipeline, a valve cover 2 is arranged on the valve body 1, a support 3 is arranged on the valve cover 2, the support 3 comprises three or more than three support legs, a fixing ring 4 is arranged outside the support 3, a bearing box 6 is arranged at the top end of the support 3, an electric device 7 is arranged above the bearing box 6, and a position indicator 5 is arranged below the bearing box 6.

The support 3 is used for fixedly connecting the valve cover 2 with the bearing box 6.

The fixing ring 4 is welded on the supporting leg of the support 3 and used for increasing the strength of the support 3, so that the rigidity of the support is met while the weight of the support is reduced, the purpose of reducing the weight is that the center of the whole valve is downward, and the shock resistance of the valve is improved.

A pressure sensor is arranged at the filler, and when a medium leaks out through the filler, an alarm can be given in time; the temperature sensor is arranged at the bearing box, so that the temperature can be increased if a fault occurs, and the control room can obtain information in time.

The working process of the application is roughly as follows: when the valve is in an open state, sodium as a medium normally passes through the pipeline; when the valve is in a closed state, the sodium stops flowing at the valve and is rapidly cooled, the cooled sodium is used as a component for blocking the valve to prevent the sodium in the pipeline from flowing, and meanwhile, each sensor of the valve detects information according to the setting and feeds the information back to the master controller.

Meanwhile, the valve can also be used on other sodium systems or large sodium loop test benches through the invention.