阅读说明：本技术 一种热力除氧器用恒速喷嘴 (Constant-speed nozzle for thermal deaerator ) 是由 邓剑虹 杨军 国金莲 刘博� 张小波 李凤梅 章岱超 韩健 邱平 吕永柱 腾飞 于 2020-05-22 设计创作，主要内容包括：本发明的一种热力除氧器用恒速喷嘴涉及一种用于向热力除氧器喷水的喷嘴,目的是为了克服现有的恒速喷嘴结构复杂,并且在某一范围的负荷下喷雾效果及传热传质性能降低的问题,包括阀座、碟片、至少两个连接杆和阀盖；阀座为环状,阀座的中部设有碟片支撑凸台,碟片支撑凸台的侧壁通过连接筋与阀座的内侧壁连接固定；碟片位于阀座的下方,碟片的中心与碟片支撑凸台的底部固定,且碟片的边缘与阀座的底部紧密贴合；阀盖位于阀座的上方,阀盖通过至少两个连接杆与阀座固定。(The invention discloses a constant-speed nozzle for a thermal deaerator, relates to a nozzle for spraying water to the thermal deaerator, and aims to solve the problems that the existing constant-speed nozzle is complex in structure and the spraying effect and the heat transfer and mass transfer performance are reduced under a certain range of load; the valve seat is annular, the middle part of the valve seat is provided with a disc supporting boss, and the side wall of the disc supporting boss is fixedly connected with the inner side wall of the valve seat through a connecting rib; the disc is positioned below the valve seat, the center of the disc is fixed with the bottom of the disc supporting boss, and the edge of the disc is tightly attached to the bottom of the valve seat; the valve cover is positioned above the valve seat and is fixed with the valve seat through at least two connecting rods.)

1. A constant-speed nozzle for a thermal oxygen remover is characterized by comprising a valve seat (1), a disc (2), at least two connecting rods (3) and a valve cover (4);

the valve seat (1) is annular, a disc supporting boss is arranged in the middle of the valve seat (1), and the side wall of the disc supporting boss is fixedly connected with the inner side wall of the valve seat (1) through a connecting rib;

the disc (2) is positioned below the valve seat (1), the center of the disc (2) is fixed with the bottom of the disc supporting boss, and the edge of the disc (2) is tightly attached to the bottom of the valve seat (1);

the valve cover (4) is positioned above the valve seat (1), and the valve cover (4) is fixed with the valve seat (1) through at least two connecting rods (3).

2. A constant velocity nozzle for a thermal deaerator according to claim 1, characterized by further comprising a clamp ring (5) and a disc fixing bolt (6);

the disc supporting boss is provided with a disc fixing screw hole with a downward opening;

the disc fixing bolt (6) is in spiral fit with the disc fixing screw hole to fix the disc (2) on the valve seat (1);

the pressing ring (5) is located between the disc (2) and the disc fixing bolt (6), and the disc (2) is pressed at the bottom of the valve seat (1) by the pressing ring (5) through the compression of the disc fixing bolt (6).

3. A constant-speed nozzle for a thermal oxygen remover according to claim 1 or 2, characterized in that said connecting rod (3) comprises a valve stem (3-1) and a sleeve (3-2);

the sleeve (3-2) is sleeved on the outer wall of the valve rod (3-1);

two ends of the valve rod (3-1) are respectively connected with the valve seat (1) and the valve cover (4);

the sleeve (3-2) is positioned between the valve seat (1) and the valve cover (4), and two ends of the sleeve are tightly abutted against the end faces of the valve seat (1) and the valve cover (4).

4. A constant-velocity nozzle for a thermal oxygen scavenger according to claim 1, characterized in that it further comprises a screen disc (9),

the filter screen disc (9) is fixed on the upper surface of the valve seat (1), filter holes are formed in the positions, corresponding to the circulation area, of the filter screen disc (9), and the circulation area is an area formed by surrounding the outer side wall of the disc support boss, the inner side wall of the valve seat (1) and the connecting ribs.

5. A constant-velocity nozzle for a thermal oxygen scavenger according to claim 1 or 2, characterized in that the disc (2) has a thickness of 0.8mm and a diameter of 190 mm.

Technical Field

The invention relates to a deaerator component, in particular to a nozzle for spraying water to a thermal deaerator.

Background

The built-in deoxygenation equipment removes dissolved non-condensable gas in water by a thermal method, so that the quality and the temperature of boiler feed water are improved, and the built-in deoxygenation equipment is effective equipment for thermal deoxygenation, and is indispensable equipment in a high-parameter large-capacity (300MW and above) generator set boiler and a nuclear power unit feed water system. The constant-speed nozzle has high-quality spraying effect and good heat and mass transfer performance under various loads, is a key part of the built-in type oxygen removal equipment, and directly influences the output of the equipment, the temperature and oxygen content of outlet water and the safety and stability of the operation of the equipment.

The existing constant-speed nozzle is complex in structure, and the spraying effect and the heat and mass transfer performance are reduced under a certain range of load.

Disclosure of Invention

The invention aims to solve the problems that the existing constant-speed nozzle is complex in structure and the spraying effect and the heat transfer performance are reduced under a certain range of load, and provides the constant-speed nozzle for the thermal oxygen remover.

The invention relates to a constant-speed nozzle for a thermal deaerator, which comprises a valve seat, a disc, at least two connecting rods and a valve cover;

the valve seat is annular, the middle part of the valve seat is provided with a disc supporting boss, and the side wall of the disc supporting boss is fixedly connected with the inner side wall of the valve seat through a connecting rib;

the disc is positioned below the valve seat, the center of the disc is fixed with the bottom of the disc supporting boss, and the edge of the disc is tightly attached to the bottom of the valve seat;

the valve cover is positioned above the valve seat and is fixed with the valve seat through at least two connecting rods.

The invention has the beneficial effects that:

1. the constant-speed nozzle for the thermal deaerator has the advantages of obvious deaerating effect, excellent and reliable mass transfer and heat transfer performance, standardized design and simple structure. The nozzles are large in number, thin and uniform in film forming, suitable for various loads, light in weight of a single nozzle, convenient to overhaul and replace and capable of reducing the workload of field assembly;

2. the constant-speed nozzle for the thermal deaerator has high-quality spraying effect and good heat and mass transfer performance under various loads, is a key part of pressure type deaerator, can ensure that the deaerator has obviously improved deaerating effect, and can reduce the manufacturing cost in batch manufacturing.

Drawings

FIG. 1 is a schematic sectional view of a constant velocity nozzle for a thermal oxygen remover according to the present invention;

FIG. 2 is a schematic top cross-sectional view of a valve seat of a constant velocity nozzle for a thermal oxygen remover according to the present invention;

fig. 3 is a schematic top view of a constant velocity nozzle screen disk for a thermal oxygen remover of the present invention.

Detailed Description