阅读说明：本技术 核电站稳压器 (Nuclear power station voltage stabilizer ) 是由 周子乐 周鹏 任红兵 傅冠桦 李权柄 梁国珍 黄晓杰 刘勋平 于 2018-08-21 设计创作，主要内容包括：本发明公开了一种核电站稳压器,包括稳压器下部筒体和设置在稳压器下部筒体外部的保温层,稳压器下部筒体部分设置于土建结构孔洞内,并在土建结构位置设置有耳式支承进行支撑,保温层包括多个互相拼接的金属壳封装的保温块,保温块内填充有耐辐照保温材料；其中,保温层包括稳压器下部筒体保温层一、稳压器下部筒体保温层二和稳压器下封头环焊缝保温层,稳压器下部筒体保温层二靠近耳式支承设置,并在稳压器下部筒体保温层二和土建结构之间固定设置有反射板。相对于现有技术,本发明核电站稳压器通过增设反射板,有效地减少了保温层与土建结构之间的热交换,可有效降低土建结构的温度。(The invention discloses a nuclear power station voltage stabilizer, which comprises a voltage stabilizer lower barrel and a heat insulation layer arranged outside the voltage stabilizer lower barrel, wherein the voltage stabilizer lower barrel is partially arranged in a hole of a civil structure and is supported by an ear-type bearing arranged at the position of the civil structure; the heat preservation layer comprises a first voltage stabilizer lower cylinder heat preservation layer, a second voltage stabilizer lower cylinder heat preservation layer and a voltage stabilizer lower end enclosure circumferential weld heat preservation layer, the second voltage stabilizer lower cylinder heat preservation layer is arranged close to the ear type support, and a reflection plate is fixedly arranged between the second voltage stabilizer lower cylinder heat preservation layer and the civil structure. Compared with the prior art, the nuclear power station voltage stabilizer effectively reduces heat exchange between the heat insulation layer and the civil structure by additionally arranging the reflection plate, and can effectively reduce the temperature of the civil structure.)

1. A nuclear power station voltage stabilizer is characterized by comprising a voltage stabilizer lower cylinder and a heat insulation layer arranged outside the voltage stabilizer lower cylinder, wherein the voltage stabilizer lower cylinder is partially arranged in a hole of a civil structure and is supported by an ear-type bearing arranged at the position of the civil structure, the heat insulation layer comprises a plurality of mutually spliced heat insulation blocks packaged by metal shells, and irradiation-resistant heat insulation materials are filled in the heat insulation blocks; the heat preservation layer comprises a first voltage stabilizer lower cylinder heat preservation layer, a second voltage stabilizer lower cylinder heat preservation layer and a voltage stabilizer lower end enclosure circumferential weld heat preservation layer, the second voltage stabilizer lower cylinder heat preservation layer is arranged close to the ear type support, and a reflection plate is fixedly arranged between the second voltage stabilizer lower cylinder heat preservation layer and the civil structure.

2. The nuclear power plant regulator of claim 1, wherein the reflector plate is a stainless steel plate having a thickness of 0.5mm to 1 mm.

3. The nuclear power plant regulator of claim 2, wherein the reflector plate has a double-sided emissivity of less than 0.5.

4. The nuclear power plant voltage stabilizer according to claim 3, wherein the reflecting plate is fixedly connected with the second insulating layer of the lower cylinder of the voltage stabilizer through a bolt structure, and the distance between the reflecting plate and the second insulating layer of the lower cylinder of the voltage stabilizer can be adjusted through the bolt structure.

5. The nuclear power plant voltage stabilizer according to claim 4, wherein the bolt structure comprises a fixing bolt and a fixing nut which is matched with the fixing bolt, the fixing bolt is fixed on an outer shell of the heat insulation block through welding or bolt connection, and the distance between the reflecting plate and the second heat insulation layer of the lower cylinder body of the voltage stabilizer can be adjusted through the fixing nut.

6. The nuclear power plant voltage stabilizer according to claim 1, characterized in that a part of the heat insulation block of the heat insulation layer of the circumferential weld of the lower end socket of the voltage stabilizer is provided with a chamfer structure, and a stainless steel guide plate is additionally arranged at the chamfer structure.

7. The nuclear power plant voltage stabilizer according to claim 1, wherein the thickness of the second heat-insulating layer of the lower cylinder body of the voltage stabilizer is 40mm to 80 mm.

8. The nuclear power plant regulator of claim 1, wherein the first insulation layer of the lower cylinder of the regulator has a thickness of 260mm to 300 mm.

9. The nuclear power plant regulator of claim 1, wherein the thickness of the heat insulating layer of the circumferential weld of the lower head of the regulator is 260mm to 300 mm.

10. The nuclear power plant regulator of claim 1, wherein the thermal insulation material is an irradiation resistant glass wool thermal insulation material.

Technical Field

The invention belongs to the field of nuclear power, and particularly relates to a voltage stabilizer for a nuclear power station.

Background

Under the normal operation condition of a nuclear power plant, the normal operation temperature of the voltage stabilizer can reach 345 ℃, and the external environment temperature is generally required to be less than 50 ℃, so in order to ensure that the heat loss of the voltage stabilizer is reduced under the normal operation condition, an insulating layer is required to be arranged on the outer wall of the voltage stabilizer. For the voltage stabilizer adopting the ear type support, the limitation of the support structure is realized, the lower cylinder body of the voltage stabilizer is close to the civil structure, the installation space of the heat insulation layer is limited, proper heat insulation materials and structures are generally selected, the sufficient cross section area of the cooling channel is ensured, the overhigh temperature of the external environment and the civil structure nearby is prevented, and the stability and the safety of the civil structure are ensured.

In view of the above, it is necessary to provide a nuclear power plant voltage stabilizer having a simple structure, capable of reducing heat loss and reducing the temperature of a civil structure.

Disclosure of Invention

The invention aims to: the nuclear power station voltage stabilizer overcomes the defects of the prior art, has a simple structure, can reduce heat loss and can reduce the temperature of a civil structure.

In order to achieve the purpose, the invention provides a nuclear power station voltage stabilizer which comprises a voltage stabilizer lower cylinder and a heat insulation layer arranged outside the voltage stabilizer lower cylinder, wherein the voltage stabilizer lower cylinder is partially arranged in a hole of a civil structure and is supported by an ear-type support arranged at the position of the civil structure, the heat insulation layer comprises a plurality of heat insulation blocks which are mutually spliced and are packaged by metal shells, and irradiation-resistant heat insulation materials are filled in the heat insulation blocks; the heat preservation layer comprises a first voltage stabilizer lower cylinder heat preservation layer, a second voltage stabilizer lower cylinder heat preservation layer and a voltage stabilizer lower end enclosure circumferential weld heat preservation layer, the second voltage stabilizer lower cylinder heat preservation layer is arranged close to the ear type support, and a reflection plate is fixedly arranged between the second voltage stabilizer lower cylinder heat preservation layer and the civil structure.

As an improvement of the nuclear power station voltage stabilizer, the reflecting plate is a stainless steel plate, and the thickness of the reflecting plate is 0.5 mm-1 mm.

As an improvement of the nuclear power station voltage stabilizer, the double-sided emissivity of the reflecting plate is lower than 0.5.

As an improvement of the nuclear power station voltage stabilizer, the reflecting plate is fixedly connected with the second heat-insulating layer of the lower cylinder of the voltage stabilizer through a bolt structure, and the distance between the reflecting plate and the second heat-insulating layer of the lower cylinder of the voltage stabilizer can be adjusted through the bolt structure.

The bolt structure comprises a fixing bolt and a fixing nut which is matched with the fixing bolt, the fixing bolt is fixed on an outer shell of the heat insulation block through welding or bolt connection, and the distance between the reflecting plate and a second heat insulation layer of a cylinder body at the lower part of the voltage stabilizer can be adjusted through the fixing nut.

As an improvement of the nuclear power station voltage stabilizer, a chamfer angle structure is arranged on part of the heat preservation block of the heat preservation layer of the circumferential weld of the lower end socket of the voltage stabilizer, and a stainless steel guide plate is additionally arranged at the chamfer angle structure.

As an improvement of the nuclear power station voltage stabilizer, the thickness of the second heat-insulating layer of the cylinder at the lower part of the voltage stabilizer is 40-80 mm.

As an improvement of the nuclear power station voltage stabilizer, the thickness of the first heat-insulating layer of the lower cylinder body of the voltage stabilizer is 260-300 mm.

As an improvement of the nuclear power station voltage stabilizer, the thickness of the heat-insulating layer of the circumferential weld of the lower end socket of the voltage stabilizer is 260-300 mm.

As an improvement of the nuclear power station voltage stabilizer, the heat insulation material is an irradiation-resistant glass wool heat insulation material.

As an improvement of the nuclear power station voltage stabilizer, the metal shell is formed by welding or riveting a stainless steel plate with the thickness of 0.5 mm-1 mm.

Compared with the prior art, the voltage stabilizer for the nuclear power station has the following beneficial technical effects:

1) by using the radiation-resistant glass wool heat-insulating material, the safety allowance of the pit filter screen is effectively improved;

2) simple structure through addding apart from adjustable reflecting plate, has reduced the heat exchange between heat preservation and the civil engineering structure effectively, has good heat preservation effect, can effectively reduce the temperature of civil engineering structure.

Drawings

The nuclear power plant regulator of the present invention will be described in detail with reference to the accompanying drawings and the following detailed description, wherein:

FIG. 1 is a schematic diagram of a nuclear power plant regulator according to the present invention.

Fig. 2 is an enlarged schematic view of a frame C of fig. 1.

FIG. 3 is a schematic sectional view A-A of FIG. 1.

Reference numerals:

10-a cylinder at the lower part of the voltage stabilizer; 200-a first heat-insulating layer of the cylinder at the lower part of the voltage stabilizer; 202-insulating layer II of the cylinder at the lower part of the voltage stabilizer; 204-a heat-insulating layer of circumferential weld of a lower end socket of the voltage stabilizer; 30-civil construction; a 40-ear bearing; 50-a reflector plate; 55-bolt construction; 550-fixing bolts; 552-a retaining nut; 60-support ear; 70-a baffle.

Detailed Description

In order to make the objects, technical solutions and technical effects of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

Referring to fig. 1 to 3, the nuclear power station voltage stabilizer of the present invention includes a voltage stabilizer lower cylinder 10 and a heat insulating layer 20 disposed outside the voltage stabilizer lower cylinder 10, the voltage stabilizer lower cylinder 10 is partially disposed in a hole of a civil structure 30, and an ear-type support 40 is disposed at a position of the civil structure 30 for supporting, the heat insulating layer 20 includes a plurality of mutually spliced metal shell-packaged heat insulating blocks (not numbered), radiation-resistant glass wool heat insulating materials (not numbered) are filled in the heat insulating blocks (not numbered), the heat insulating layer 20 includes a voltage stabilizer lower cylinder heat insulating layer 200, a voltage stabilizer lower cylinder heat insulating layer 202 and a voltage stabilizer lower head circular weld seam heat insulating layer 204, the voltage stabilizer lower cylinder heat insulating layer 202 is disposed near the ear-type support 40, and a reflection plate 50 is fixedly disposed between the voltage stabilizer lower cylinder heat insulating layer 202 and the civil structure 30.

The ear-type support 40 is mounted on the civil structure 30, the lower cylinder 10 of the voltage stabilizer is mounted on the ear-type support 40 through the fixed support lug 60, and part of the cylinder is positioned in the civil structure 30.

The heat preservation layer wraps around the stabiliser lower part barrel 10 for heat preservation and reduces heat loss, and the heat preservation layer includes stabiliser lower part barrel heat preservation layer one 200, stabiliser lower part barrel heat preservation layer two 202 and stabiliser lower head girth weld heat preservation layer 204, and at the position that has civil engineering 30, stabiliser lower part barrel heat preservation layer two 202 sets up near ear-type support 40. The thickness of the first heat-insulating layer 200 of the lower cylinder of the voltage stabilizer is 260 mm-300 mm, in the embodiment shown in the figure, is 280mm, and the thickness of the heat-insulating layer 204 of the circumferential weld of the lower end socket of the voltage stabilizer is 260 mm-300 mm, in the embodiment shown in the figure, is 280 mm. Because the lower part barrel near ear formula support 40 is nearer apart from civil engineering structure 30, and the installation space of heat preservation is limited, and thickness need carry out the attenuate, and the thickness of stabiliser lower part barrel heat preservation second reduces to 40mm ~ 80mm to guarantee sufficient cooling channel cross sectional area, the heat that the heat preservation gived off is taken away to the cooling air of being convenient for, avoids civil engineering structure 30 high temperature. At the position where the civil engineering structure 30 is not arranged, the heat preservation layer of the lower cylinder of the voltage stabilizer does not need to be provided with a second heat preservation layer 202 of the lower cylinder of the voltage stabilizer, and the region of the second heat preservation layer 202 of the lower cylinder of the voltage stabilizer is replaced by the first heat preservation layer 200 of the lower cylinder of the voltage stabilizer.

The reflecting plate 50 is arranged between the second cylinder heat-insulating layer 202 on the lower portion of the voltage stabilizer and the civil structure 30, the reflecting plate 50 is a stainless steel reflecting plate which is 0.5-1 mm thick and has a double-sided emissivity lower than 0.5, and the reflecting plate reflects radiant heat emitted by the second cylinder heat-insulating layer 202 on the lower portion of the voltage stabilizer, so that the radiant heat absorbed by the civil structure 30 is reduced, meanwhile, heat convection of most of cooling air and the heat-insulating layer is limited between the second cylinder heat-insulating layer on the lower portion of the voltage stabilizer and the reflecting plate 50, and the heat absorbed by the civil structure 30 is further.

The reflection plate 50 is fixedly connected with the second thermal insulation layer 202 of the lower cylinder of the voltage stabilizer, in the illustrated embodiment, the auxiliary fixed connection is mainly performed through a bolt structure 55, and the distance between the reflection plate 50 and the second thermal insulation layer 202 of the lower cylinder of the voltage stabilizer can be adjusted through the bolt structure 55. Specifically, the bolt structure 55 includes a fixing bolt 550 and a fixing nut 552, the fixing bolt 550 is fixed on an outer casing of a thermal insulation block (not numbered in the figure) by welding or bolting, and the distance between the reflection plate 50 and the second thermal insulation layer of the lower cylinder of the voltage stabilizer can be adjusted by the fixing nut 552.

In other embodiments of the present invention, when the distance between the reflection plate 50 and the second insulating layer 202 of the lower cylinder of the voltage stabilizer is determined, the two layers can be fixedly connected by directly adopting a welding mode.

Further, as shown in fig. 2, a part of the heat insulation blocks (not numbered) of the circumferential weld heat insulation layer 204 of the lower end enclosure of the voltage stabilizer is further subjected to chamfering treatment, a flow guide plate 70 is additionally arranged at the chamfering structure, the flow guide plate 70 is of a stainless steel structure and is fixed on the chamfering structure through welding or riveting, and the end part of the flow guide plate 70 is welded and fixed with the second heat insulation layer 202 of the lower cylinder of the voltage stabilizer at the same time, so that cooling air circulation is facilitated.

The heat-insulating layer is an irradiation-resistant glass wool heat-insulating layer and is formed by splicing a plurality of heat-insulating blocks (not shown) packaged by metal shells, and the metal shells are formed by welding or riveting 0.5-1 mm stainless steel plates.

The insulating material can also be a Microtherm high-temperature insulating material, but the Microtherm high-temperature insulating material is extremely easy to damage in a nuclear power station loss of coolant accident, so that granular fragments are easily formed, obvious adverse effects can be generated on the pressure drop of a fragment bed after the Microtherm high-temperature insulating material is mixed with other fiber fragments, and the safety allowance of a pit filter screen can be reduced. Therefore, the radiation-resistant glass wool thermal insulation material which can improve the safety margin of the pit filter screen and meet the thermal insulation performance requirement is preferably used, so that the operation safety of the nuclear power plant is improved.

Compared with the prior art, the voltage stabilizer for the nuclear power station has the following beneficial technical effects:

1) by using the radiation-resistant glass wool heat-insulating material, the safety allowance of the pit filter screen is effectively improved;

2) simple structure through addding apart from adjustable reflecting plate 50, has reduced the heat exchange between heat preservation and the civil engineering structure 30 effectively, has good heat preservation effect, can effectively reduce the temperature of civil engineering structure 30.

The present invention can be modified and adapted appropriately from the above-described embodiments, according to the principles described above. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.