阅读说明：本技术 一种反应堆稳压器使用的喷雾头芯体结构 (Atomizing head core structure for reactor voltage stabilizer ) 是由 张大林 张猛 王成龙 苏光辉 秋穗正 田文喜 于 2021-08-31 设计创作，主要内容包括：本发明公开了一种反应堆稳压器使用的喷雾头芯体结构,芯体采用304不锈钢或316不锈钢,由铸造或机加工工艺制成。芯体结构主要包括芯体主体、缓冲头、肋片和旋流片。一回路冷却水经稳压器喷雾头喷出时,缓冲头可缓冲流道中心水流的速度并改变中心水流方向,使之通过旁边旋流片区域通道流出,可使喷雾在喷出喷雾头之后更加均匀。本发明结构简化,可保证减少喷雾场中水流中心集中现象,同时使喷雾场流量密度分布均匀。(The invention discloses a spray head core body structure used for a reactor voltage stabilizer, wherein a core body is made of 304 stainless steel or 316 stainless steel by a casting or machining process. The core body structure mainly comprises a core body main body, a buffer head, ribs and a spinning disk. When the cooling water of a loop is sprayed out through the spray head of the voltage stabilizer, the buffer head can buffer the speed of the central water flow of the flow channel and change the direction of the central water flow, so that the central water flow flows out through the adjacent vortex sheet area channel, and the spray can be more uniform after the spray head is sprayed out. The invention has simplified structure, can ensure that the phenomenon of water flow center concentration in the spray field is reduced, and simultaneously ensures that the flow density distribution of the spray field is uniform.)

1. The utility model provides a atomising head core structure that reactor stabiliser used which characterized in that: comprises a water-spinning core buffer head (1), fins (2), a core body (3) and water-spinning blades (4); the water spinning core buffer head (1) is positioned above the core body (3); the fins (2) are symmetrically distributed on two sides of the core body (3); the rotational flow blades (4) are connected with the fins (2) and the core body (3).

2. The spray head core structure for the reactor pressure stabilizer of claim 1, wherein: the water rotating core buffer head (1) is an arc surface body or a hemisphere and is used for slowing down water flow in a central area and changing the flow direction of the water flow; the fins (2) are trapezoidal and have preset thicknesses; the core body (3) is of a circular truncated cone structure, the area of the upper bottom surface is the same as that of the bottom surface of the buffer head (3), and an acute angle between the side edge of a trapezoid, which is cut by a plane passing through a straight line formed by connecting the centers of the upper bottom surface and the lower bottom edge of the trapezoid, and the lower bottom edge of the trapezoid is 82-85 degrees; the water spinning core buffer head (1) and the core body (3) are of solid structures, and the central axis of the water spinning core buffer head is not provided with a through hole channel; the swirl vanes (4) are elliptical surfaces with circular projections on the bottom surfaces, and the included acute angle between the plane and the center line of the core body (3) is 32-35 degrees.

3. The spray head core structure for the reactor pressure stabilizer of claim 1, wherein: has two fins (2) and two swirl vanes (4).

4. The spray head core structure for the reactor pressure stabilizer of claim 1, wherein: when the water-core buffer head works normally, the upstream water flow rotates downwards from the water-core buffer head (1), and the original water flow movement direction is changed under the influence of the rotational flow blades (4) to form rotational flow.

5. The spray head core structure for the reactor pressure stabilizer of claim 1, wherein: the spray head core structure is made of 304 stainless steel or 316 stainless steel through a casting or machining process.

Technical Field

The invention relates to the technical field of design of a spray head of a loop voltage stabilizer of a nuclear reactor, in particular to a core structure used for the spray head of key equipment of the reactor voltage stabilizer.

Background

The reactor primary loop voltage stabilizer has an important function for adjusting the temperature and the pressure of a primary loop, and when the temperature and the pressure of the primary loop rise, coolant with lower temperature from the primary loop is sprayed out through the spray head above the voltage stabilizer, so that the functions of reducing the temperature and the pressure of the primary loop and absorbing the gas in a cavity on the voltage stabilizer are achieved.

The more uniform the flow density distribution of a spray field formed by cooling water sprayed from the spray head is, the smaller the particle size of atomized liquid drops in the spray field is, and the better the cooling effect and the gas absorption effect are. And because the flow of the spray head of the reactor primary loop voltage stabilizer is generally larger and the pressure is lower, the water spinning core with the straight through hole flow channel has obvious phenomenon of water flow distribution center concentration, and the flow distribution uniformity and the granularity parameter of a spray field are greatly influenced. .

Disclosure of Invention

The atomizing head core body structure used for the reactor pressure stabilizer is designed, has a simple and reliable structure, can greatly reduce the phenomenon of central concentration of flow distribution, enables the flow density distribution to tend to be uniform, refines the size of liquid drops in an atomizing field, and reduces the parameters of the atomizing granularity.

In order to achieve the purpose, the invention adopts the following technical scheme:

a spray head core body structure used for a reactor voltage stabilizer comprises a water rotating core buffer head 1, fins 2, a core body main body 3 and a rotational flow blade 4; the water spinning core buffer head 1 is positioned above the core body 3; the fins 2 are symmetrically distributed on two sides of the core body 3; the swirl vanes 4 are connected with the fins 2 and the core body 3.

The water rotating core buffer head 1 is an arc surface body or a hemisphere and is used for slowing down water flow in a central area and changing the flow direction of the water flow; the fins 2 are trapezoidal and have preset thicknesses; the core body 3 is of a circular truncated cone structure, the area of the upper bottom surface of the core body is the same as that of the bottom surface of the buffer head 3, and an acute angle formed by a trapezoidal side edge and the lower bottom edge of a trapezoid, which is obtained by crossing a plane of a straight line formed by connecting the centers of the upper bottom surface and the lower bottom surface, is 82-85 degrees; the water spinning core buffer head 1 and the core body 3 are of solid structures, and the central axis of the water spinning core buffer head is not provided with a through hole channel; the swirl vanes 4 are elliptical surfaces with circular projections towards the bottom surface, and the included acute angle between the plane and the central line of the core body 3 is 32-35 degrees.

Having two fins 2 and two swirl vanes 4.

When the water-core buffer head works normally, the upstream water flow rotates downwards from the water-core buffer head 1, and the original water flow movement direction is changed under the influence of the rotational flow blades 4 to form rotational flow.

The spray head core structure is made of 304 stainless steel or 316 stainless steel through a casting or machining process.

Compared with the prior art, the invention has the following advantages:

when the spray head normally works, the upstream cooling water flows through the water-spinning core buffer head 1 for buffering, the water flow speed and direction in the central area are reduced, the central concentration phenomenon is reduced, meanwhile, the cooling water rotates along the rotational flow blades 4 to form rotational flow, and when the cooling water flows through the lower half part of the core body 2, the cooling water undergoes an acceleration process and is finally sprayed out through the spray head outlet to form spray.

The invention provides a structural design of an inner core body of a spray head aiming at the working condition of a spray head of a voltage stabilizer, the structure of the spray head is simple, the framework is stable and reliable, the phenomenon of central concentration of flow distribution of a spray field formed by spraying of the spray head can be effectively improved, the distribution is uniform, and the granularity is reduced.

Drawings

Fig. 1 is a front view of a structure of a core of a spray head used for a reactor voltage stabilizer.

Fig. 2 is a left side view of a structure of a core of a spray head used in a reactor stabilizer.

Fig. 3 is a top view of a core structure of a spray head used in a reactor voltage stabilizer.

Detailed Description

The invention will now be further described with reference to the following examples, and the accompanying drawings:

as shown in fig. 1, the core body structure of the atomizing head used in the reactor pressure stabilizer of the present invention comprises a water-spinning core buffer head 1, fins 2, a core body 3 and swirl vanes 4; the water spinning core buffer head 1 is positioned above the core body 3; the fins 2 are symmetrically distributed on two sides of the core body 3; the swirl vanes 4 are connected with the fins 2 and the core body 3.

As a preferred embodiment of the present invention, the spin core buffer head 1 is an arc surface body or a hemisphere, and is used for slowing down the water flow in the central area and simultaneously changing the flow direction of the water flow; the fins 2 are trapezoidal and have the thickness of 4.5mm-6.5 mm; the core body 3 is in a circular truncated cone structure, the area of the upper bottom surface is the same as that of the bottom surface of the buffer head 3, and an acute angle between the side edge of a trapezoid, which is cut by a plane passing through a straight line formed by connecting the centers of the upper bottom surface and the lower bottom surface of the trapezoid, and the lower bottom edge of the trapezoid is 82-85 degrees; the water spinning core buffer head 1 and the core body 3 are of solid structures, and the central axes of the water spinning core buffer head and the core body do not have a through hole channel; the swirl vanes 4 are elliptical surfaces with circular projections towards the bottom surface, and the included acute angle between the plane and the central line of the core body 3 is 32-35 degrees.

As a preferred embodiment of the invention, there are two fins 2 and two swirl vanes 4

As a preferred embodiment of the invention, during normal operation, the upstream water flow rotates downwards from the water core buffer head 1, and the original water flow movement direction is changed under the influence of the swirl vanes 4 to form a swirl.

As a preferred embodiment of the invention, the spray head core structure is made of 304 stainless steel or 316 stainless steel by casting or machining process.

The working principle of the invention is as follows:

when the water-cooling device works normally, the upstream cooling water is influenced by the water-rotating core buffer head 1 to slow down the water flow speed of the central area of the water-cooling device, and simultaneously, the speed direction of the upstream cooling water is changed to form primary stirring; the original water flow movement direction is changed under the influence of the rotational flow blades 4 to form rotational flow; in the process of moving from top to bottom, the speed of water flow flowing out of the core body area is increased under the influence of the circular truncated cone structure of the core body; thereby achieving the effects of slowing down the central concentration phenomenon of the spray field, increasing the flow distribution uniformity and reducing the atomized granularity parameters.