CN109737244B - Nuclear power plant penetrating piece seal head and penetrating piece structure thereof - Google Patents
Nuclear power plant penetrating piece seal head and penetrating piece structure thereof Download PDFInfo
- Publication number
- CN109737244B CN109737244B CN201910118911.7A CN201910118911A CN109737244B CN 109737244 B CN109737244 B CN 109737244B CN 201910118911 A CN201910118911 A CN 201910118911A CN 109737244 B CN109737244 B CN 109737244B
- Authority
- CN
- China
- Prior art keywords
- end socket
- power plant
- nuclear power
- cavity
- circulating water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a penetrating piece end socket of a nuclear power plant, which comprises: the end socket comprises an end socket body, wherein the end socket body is provided with a through hole, an internal open cavity is further formed in the penetrating piece end socket and is arranged in the end socket body and communicated with the through hole formed in the end socket body. Compared with the prior art, the penetrating piece seal head of the nuclear power plant has the advantages that the structure is simple and compact, the installation and the maintenance are convenient, the good sealing of a pipeline and the penetrating piece seal head can be fully guaranteed, the penetrating piece seal head can be repeatedly disassembled and used, the influence of the drastic change of the temperature of a medium on the temperature change of a wall body can be effectively relieved, and the thermal fatigue effect and the thermal aging of the wall body near a sleeve can be further effectively reduced. In addition, the invention also provides a nuclear power plant penetration piece structure.
Description
Technical Field
The invention belongs to the field of nuclear power, and particularly relates to a penetrating piece end socket of a nuclear power plant and a penetrating piece structure of the penetrating piece end socket.
Background
The penetrating piece end socket is a device for fixing a pipeline penetrating through a wall to the wall, is a component of the pipeline, is a channel for accommodating a process medium, and provides constraint support for the pipeline by welding with a sleeve, so that the medium is effectively isolated from the outside, and radioactive leakage between different rooms or environments is avoided.
The commonly used penetrating piece end socket in the prior art only carries out heat transfer with fluid medium in a forced convection heat exchange mode on the inner wall, and when the temperature of the fluid medium is changed violently, the temperature of the inner wall of the penetrating piece end socket is changed violently in a short time. Meanwhile, the temperature change of the penetrating piece rapidly influences the temperature of the wall body in the area near the sleeve in a heat transfer mode. When the temperature of the medium is repeatedly and violently changed along with the running state of the nuclear power plant, a thermal fatigue effect is generated on the concrete of the wall body near the sleeve, and the wall body is cracked and damaged.
In view of this, it is necessary to provide a penetrating member end socket of a nuclear power plant and a penetrating member structure thereof, which have a simple structure and are convenient to install and maintain, so that the influence of severe change of medium temperature on the temperature change of a wall body is effectively alleviated, and the thermal fatigue effect of the wall body is further effectively reduced.
Disclosure of Invention
The invention aims to: the defects of the prior art are overcome, the penetrating piece end socket of the nuclear power plant and the penetrating piece structure thereof are simple in structure and convenient to install and maintain, the influence of severe change of medium temperature on temperature change of the wall body is effectively relieved, and then the thermal fatigue effect of the wall body is effectively reduced.
In order to achieve the above object, the present invention provides a nuclear power plant penetration piece sealing head, including: the end socket comprises an end socket body, wherein the end socket body is provided with a through hole, the penetrating piece end socket is further provided with an internal open cavity, and the internal open cavity is arranged in the end socket body and communicated with the through hole formed in the end socket body.
As an improvement of the penetrating piece end socket of the nuclear power plant, the internal open type cavity is arranged around the periphery of the through hole.
As an improvement of the penetrating piece end socket of the nuclear power plant, a device for slowing down the muddy heat stirring is arranged in the internal open type cavity.
As an improvement of the penetrating piece end socket of the nuclear power plant, the device for slowing down the muddy heat comprises a flow limiting orifice plate.
As an improvement of the penetrating piece end socket of the nuclear power plant, the connecting part of the edge of the internal open cavity and the through hole is of a streamline structure.
As an improvement of the penetrating piece end socket of the nuclear power plant, the streamline structure is an arc structure.
As an improvement of the penetrating piece seal head of the nuclear power plant, a sub-cavity is further arranged in the seal head body, and the sub-cavity is communicated with the interior of the internal open cavity and keeps closed with the external environment.
As an improvement of the penetrating piece seal head of the nuclear power plant, an external circulating water cavity and a circulating water inlet and outlet are further arranged inside the seal head body, the external circulating water cavity is located on the outer side of the internal open cavity, and the external circulating water cavity is communicated with the circulating water inlet and outlet.
As an improvement of the penetrating piece end socket of the nuclear power plant, a circulating water inlet and a circulating water outlet of the external circulating water cavity are connected with a circulating water inlet and outlet pipe nozzle.
As an improvement of the penetrating piece seal head of the nuclear power plant, the circulating water inlet and outlet pipe nozzle and the seal head body are made of stainless steel or carbon steel materials.
As an improvement of the penetrating piece end socket of the nuclear power plant, the external circulating water cavity is a streamline cavity.
As an improvement of the penetrating piece seal head of the nuclear power plant, both sides of the through hole and the periphery of the seal head body are provided with nozzles.
In order to achieve the above object, the present invention also provides a nuclear power plant penetration structure, including:
the sleeve is fixedly arranged in the concrete wall body, two ends of the sleeve are positioned outside the concrete wall body, and an internal pipeline is arranged in the sleeve;
the end socket is provided with a through hole, the periphery of the end socket is welded and fixed with one end of the sleeve, one side of the through hole is welded and connected with the inner pipeline, the other side of the through hole is welded and connected with the outer pipeline positioned outside the concrete wall, and the inner pipeline, the end socket and the outer pipeline are communicated after being fixedly connected;
wherein, the head is above-mentioned nuclear power plant's penetration piece head.
As an improvement of the penetrating piece structure of the nuclear power plant, another seal head is arranged between a sleeve and an internal pipeline on the inner side of the concrete wall, the seal heads on two sides of the concrete wall, the sleeve and the outer wall of the internal pipeline form a cavity, the sleeve is provided with an inlet and outlet nozzle, and a non-corrosive fluid medium is filled in the cavity.
Compared with the prior art, the penetrating piece end socket and the penetrating piece structure thereof for the nuclear power plant have the following beneficial technical effects:
1) the structure is compact and symmetrical, the installation is convenient, and the maintenance is convenient;
2) by arranging the internal open cavity, the single heat transfer mode of the fluid medium and the inner wall of the conventional design penetrating piece end socket is changed, a convection heat transfer boundary between new and old fluid media is increased, the heat transfer mode is optimized from the simple convection heat transfer to a series of processes of cold and hot fluid convection heat transfer, heat stirring, fluid and penetrating piece inner wall convection heat transfer, the thermal shock or cold shock effect possibly caused by the change of the operation working condition of a nuclear power plant is buffered, the temperature change rate of the inner wall of the penetrating piece and the wall body in the area near the penetrating piece sleeve is slowed down, and the fatigue stress and the thermal aging effect of the wall body concrete are reduced;
3) by arranging the external circulating water cavity, namely additionally arranging a heat transfer barrier on a heat transfer path between the penetrating piece seal head and the wall body in the area near the penetrating piece sleeve, the heat transfer mode is optimized from simple heat transfer to heat transfer, namely heat convection, heat stirring, heat convection and heat transfer, so that the thermal shock or cold shock effect possibly caused by the change of the operating condition of a nuclear power plant is buffered, the temperature change rate of the inner wall of the penetrating piece and the wall body in the area near the penetrating piece sleeve is slowed down, and the fatigue stress and the thermal aging effect of the concrete of the wall body are reduced;
4) by arranging the external circulating water cavity, the heat of the penetrating piece end socket is circularly led out, the temperature change amplitude of the penetrating piece end socket and the wall body in the area near the penetrating piece sleeve can be effectively reduced, and the fatigue stress and the thermal aging effect of the wall body concrete are reduced;
5) the nozzle is arranged in the external circulating water cavity, the filling and discharging functions of the cooling circulating water are realized, the nozzle can realize regular manual filling and discharging and sealing, the continuous automatic circulating system can be arranged by connecting pipelines, the comprehensive treatment design scheme is convenient to combine the arrangement space, transient load, mechanical equipment and the like of the whole nuclear power plant, and the realizability is high.
Drawings
The invention is described in detail below with reference to the accompanying drawings and the detailed description of the embodiments, wherein:
fig. 1 is a schematic structural diagram of a penetration seal head of a nuclear power plant.
Fig. 2 is an elevation view of a nuclear power plant penetration head of the present invention.
FIG. 3 is a schematic structural view of a nuclear power plant penetration structure of the present invention. The attached drawings are marked as follows:
10-end enclosure body; 12-a through hole; 14-an internal open cavity; 16-a nozzle; 18-welding a groove; 20-nozzle; 22-welding a groove; 24-an external circulating water cavity; 26-circulating water inlet and outlet nozzles; 30-a sleeve; 32-concrete walls; 34-an inner pipe; 36-end enclosure; 38-external pipes; 40-ribbed plate.
Detailed Description
In order to make the objects, technical solutions and technical effects of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. 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 and 2, the penetrating member end socket of the nuclear power plant of the present invention includes: the end socket comprises an end socket body 10, wherein the end socket body 10 is provided with a through hole 12, an internal open cavity 14 is further arranged on the penetrating piece end socket, and the internal open cavity 14 is arranged in the end socket body 10 and is communicated with the through hole 12 arranged on the end socket body 10.
Referring to fig. 1, the end socket body 10 is of an axisymmetric structure, a through hole 12 is formed in the middle of the end socket body, nozzles 16 are formed on two sides of the through hole 12, and a welding groove 18 is formed at the positions of the nozzles 16 to facilitate welding connection with a pipeline.
The periphery of head body 10 is the ring structure, and one side is formed with mouthpiece 20, and mouthpiece 20 department is provided with welding groove 22, is convenient for and muffjoint.
The inner open cavity 14 is arranged inside the end socket body 10, surrounds the circumference and is communicated with the periphery of the through hole 12. Preferably, the internal open cavity 14 is provided in a central location of the thickness of the closure body 10, the specifications of which are set as desired.
Further, the edge of the internal open cavity 14 is a streamline structure, preferably a circular arc structure, and the joint of the internal open cavity 14 and the through hole is a round angle to prevent stress concentration.
Further, the internal open cavity 14 is provided in a form of narrow outside and wide inside, that is, the width at the position communicating with the through hole 12 is narrow, and the width at the position far away from the through hole 12 is wide, so as to slow down the mixing speed of the new medium and the old medium.
The internal open cavity 14 is used for accommodating pipeline media, and the design of the cavity can well ensure the tightness of the media and the strength of the penetrating piece body 10, and meanwhile, a space for providing heat convection and heat turbidness for the old and new media when the temperature state of the upstream media is changed violently. When the temperature of the upstream fluid medium changes violently, when a new fluid medium flows through the penetrating piece end socket, heat exchange is carried out between the new fluid medium and the fluid medium before the temperature in the cavity is not changed in a thermal convection mode, the temperature of the inner wall of the penetrating piece end socket changes slowly along with the progress of thermal stirring, and the temperature change rate of the penetrating piece end socket and the wall body of the area near the sleeve caused by cold impact or thermal impact of the fluid medium in the pipeline of the nuclear power plant is effectively reduced.
The internal open cavity 14 has a larger cross-sectional area in a direction perpendicular to a heat transfer path between the penetrating piece end socket and the penetrating piece sleeve, so that more heat is prevented from being rapidly transferred to a concrete wall through the end socket body 10, and the thermal buffering effect of the stored medium in the cavity on the heat transfer path is fully exerted.
Further, a plurality of sub-cavities (not shown) are arranged in the head body 10 along the periphery of the internal open cavity 14, wherein the plurality of sub-cavities is 2, 3, 4, 5, 6 or more, and each sub-cavity is communicated with the inside of the internal open cavity 14 and is kept airtight with the external environment. Through setting up the sub-cavity for hold more buffer medium to when system medium temperature produces violent change, slow down new and old pipeline medium heat exchange's process, reduce the speed of change of penetrating through a head inner wall temperature.
Further, a device (not shown) for reducing thermal turbulences is further disposed in the internal open cavity 14, for example, a flow-limiting orifice plate or the like is disposed in the internal open cavity 14, so as to control the efficiency of convection heat transfer of new and old fluid media, and reduce the influence of cold shock or thermal shock.
In order to further slow down the heat transfer rate and conduct heat, an external circulating water cavity 24 is further arranged in the head body 10, and the external circulating water cavity 24 is located outside the internal open cavity 14. Preferably, the external circulating water cavity 24 is arranged around the internal open cavity 14, and circulating water inlets and outlets are arranged on the upper portion and the lower portion of the end enclosure body 10, the circulating water inlets and outlets are respectively communicated with the external circulating water cavity 24, the external circulating water cavity 24 is used for heat conduction of the end enclosure of the penetration piece, and the boundary design of the external circulating water cavity 24 should not interfere with the pressure boundary performance of the fluid medium inside the penetration piece, and does not affect the tightness of the pipeline medium. Meanwhile, the external circulating water cavity 24 should be close to the internal open cavity 14 as much as possible on the basis of ensuring the design strength of the penetrating piece end socket so as to improve the heat exchange efficiency. On the basis of guaranteeing the design strength of the penetrating piece, the external circulating water cavity 24 has a larger cross-sectional area in the direction perpendicular to the heat transfer path between the penetrating piece end socket and the penetrating piece sleeve so as to achieve the effect of a heat transfer barrier. The spacing between the outer circulating water cavity 24 and the inner open cavity 14 is adjusted as desired.
Further, the external circulating water cavity 24 is a streamline cavity, and the inside of the external circulating water cavity is filled with a high-heat-capacity non-corrosive fluid (such as low-temperature demineralized water), and the non-corrosive fluid can be replaced periodically or set into a circulating flow form through a driving device so as to absorb heat which is transmitted to a wall body by a penetrating piece end socket, and reduce the temperature change amplitude of the wall body of the penetrating piece end socket and the area near the sleeve caused by cold impact or thermal impact of fluid media in a pipeline of a nuclear power plant.
In order to facilitate heat conduction, a circulating water inlet and outlet nozzle 26 is arranged at a circulating water inlet and outlet communicated with the external circulating water cavity 24, the circulating water inlet and outlet nozzle 26 can be used for periodically filling and discharging high-heat-capacity non-corrosive fluid media, such as low-temperature demineralized water, and sealing in other time, and can also be used for arranging a fluid circulating system connected continuously to continuously conduct head heat.
The material of the circulating water inlet and outlet nozzle 26 is the same as that of the head body 10, and stainless steel or carbon steel materials, such as P280GH, Z2CN1810 materials, etc., are generally adopted.
The invention also provides a nuclear power plant penetration piece structure, which comprises:
the sleeve 30 is fixedly arranged in the concrete wall 32, two ends of the sleeve are positioned outside the concrete wall 32, and an internal pipeline 34 is arranged in the sleeve;
the end socket 36 is provided with a through hole 12, the periphery of the through hole 12 is welded and fixed with one end of the sleeve 30, one side of the through hole 12 is welded and connected with the internal pipeline 34, the other side of the through hole is welded and connected with the external pipeline 38 positioned outside the concrete wall 32, and the internal pipeline 34, the end socket 36 and the external pipeline 38 are communicated after being fixedly connected;
the seal head 36 is the seal head of the nuclear power plant penetrating piece.
In order to improve the circulating heat conduction capability of the penetration piece structure of the nuclear power plant, another seal head (not shown) can be welded between the sleeve 30 and the internal pipeline 34 on the inner side of the concrete wall 32, the other seal head can be the same as the seal head 36, or common seal heads in the prior art can be adopted, the seal heads on two sides of the wall, the sleeve 30 and the external wall of the internal pipeline 34 form a cavity, an inlet and outlet nozzle (not shown) is arranged on the sleeve 30, and a non-corrosive low-temperature fluid medium (such as low-temperature demineralized water) with high heat capacity is filled in the cavity to conduct circulating heat conduction.
In order to further improve the structural strength, the outer wall of the sleeve 30 is further welded with a rib plate 40, and the rib plate 40 is fixed in the concrete wall 32 in a pouring manner. Preferably, the rib 40 is provided in a plurality, and is welded to the outer wall of the sleeve 30 at regular intervals.
Compared with the prior art, the penetrating piece end socket and the penetrating piece structure thereof for the nuclear power plant have the following beneficial technical effects:
1) the structure is compact and symmetrical, and the installation and the maintenance are convenient;
2) by arranging the internal open cavity, the single heat transfer mode of the fluid medium and the inner wall of the conventional design penetrating piece end socket is changed, a convection heat transfer boundary between new and old fluid media is increased, the heat transfer mode is optimized from the simple convection heat transfer to a series of processes of cold and hot fluid convection heat transfer, heat stirring, fluid and penetrating piece inner wall convection heat transfer, the thermal shock or cold shock effect possibly caused by the change of the operation working condition of a nuclear power plant is buffered, the temperature change rate of the inner wall of the penetrating piece and the wall body in the area near the penetrating piece sleeve is slowed down, and the fatigue stress and the thermal aging effect of the wall body concrete are reduced;
3) by arranging the external circulating water cavity, namely additionally arranging a heat transfer barrier on a heat transfer path between the penetrating piece seal head and the wall body in the area near the penetrating piece sleeve, the heat transfer mode is optimized from simple heat transfer to heat transfer, namely heat convection, heat stirring, heat convection and heat transfer, so that the thermal shock or cold shock effect possibly caused by the change of the operating condition of a nuclear power plant is buffered, the temperature change rate of the inner wall of the penetrating piece and the wall body in the area near the penetrating piece sleeve is slowed down, and the fatigue stress and the thermal aging effect of the concrete of the wall body are reduced;
4) by arranging the external circulating water cavity, the heat of the penetrating piece end socket is circularly led out, the temperature change amplitude of the penetrating piece end socket and the wall body in the area near the penetrating piece sleeve can be effectively reduced, and the fatigue stress and the thermal aging effect of the wall body concrete are reduced;
5) the nozzle is arranged in the external circulating water cavity, the filling and discharging functions of the cooling circulating water are realized, the nozzle can realize regular manual filling and discharging and sealing, the continuous automatic circulating system can be arranged by connecting pipelines, the comprehensive treatment design scheme is convenient to combine the arrangement space, transient load, mechanical equipment and the like of the whole nuclear power plant, and the realizability is high.
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.
Claims (9)
1. A nuclear power plant penetration head, comprising: the end socket comprises an end socket body, wherein the end socket body is provided with a through hole, and is characterized in that the penetrating piece end socket is also provided with an internal open cavity which is arranged in the end socket body and communicated with the through hole arranged in the end socket body; and a device for slowing down the hot muddy water is arranged in the inner open cavity.
2. The nuclear power plant penetration head of claim 1, wherein the internal open cavity is disposed around a perimeter of the through-hole.
3. The nuclear power plant penetrating member head of claim 2, wherein a connecting portion of the inner open cavity edge and the through hole is of a streamline structure.
4. A nuclear power plant penetration head according to claim 1, further comprising a sub-cavity disposed within the head body, the sub-cavity communicating with the interior of the open interior cavity and being sealed from the external environment.
5. A nuclear power plant penetrating member head according to claim 1, wherein an external circulating water cavity and a circulating water inlet and outlet are further arranged inside the head body, the external circulating water cavity is located on the outer side of the internal open cavity, and the external circulating water cavity is communicated with the circulating water inlet and outlet.
6. A nuclear power plant penetration head according to claim 5, wherein a circulating water inlet and outlet pipe nozzle is connected to a circulating water inlet and outlet position of the external circulating water cavity.
7. The nuclear power plant penetration head of claim 6, wherein the external circulating water cavity is a streamlined cavity.
8. A nuclear power plant penetration head according to claim 1, wherein both sides of the through hole and the periphery of the head body are provided with nozzles.
9. A nuclear power plant penetration structure, comprising:
the sleeve is fixedly arranged in the concrete wall body, two ends of the sleeve are positioned outside the concrete wall body, and an internal pipeline is arranged in the sleeve;
the end socket is provided with a through hole, the periphery of the end socket is welded and fixed with one end of the sleeve, one side of the through hole is welded and connected with the inner pipeline, the other side of the through hole is welded and connected with the outer pipeline positioned outside the concrete wall, and the inner pipeline, the end socket and the outer pipeline are communicated after being fixedly connected;
the end socket is the end socket for the nuclear power plant penetration piece of any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910118911.7A CN109737244B (en) | 2019-02-15 | 2019-02-15 | Nuclear power plant penetrating piece seal head and penetrating piece structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910118911.7A CN109737244B (en) | 2019-02-15 | 2019-02-15 | Nuclear power plant penetrating piece seal head and penetrating piece structure thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109737244A CN109737244A (en) | 2019-05-10 |
| CN109737244B true CN109737244B (en) | 2021-08-31 |
Family
ID=66367570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910118911.7A Active CN109737244B (en) | 2019-02-15 | 2019-02-15 | Nuclear power plant penetrating piece seal head and penetrating piece structure thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109737244B (en) |
Family Cites Families (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3711125A (en) * | 1971-06-29 | 1973-01-16 | Ford Motor Co | Quick connect fitting for a hydraulic conduit |
| US3871689A (en) * | 1973-03-01 | 1975-03-18 | Nikolai Nikolaevich Zaderei | Device for sealing a high-temperature conduit |
| SU777295A1 (en) * | 1979-02-15 | 1980-11-07 | Научно-производственное объединение "ЭНЕРГИЯ" | Hot pipeline laying seal assembly |
| JPS57125894A (en) * | 1981-01-29 | 1982-08-05 | Ishikawajima Harima Heavy Ind | Wall through portion cooling device of pipeline for high-temperature fluid |
| CN2343565Y (en) * | 1997-11-11 | 1999-10-13 | 田彬 | Bubble-type plate heat exchanging element |
| CN1102212C (en) * | 1999-08-30 | 2003-02-26 | 赵洪海 | Insulating pipe bracket |
| US6792726B1 (en) * | 2002-01-04 | 2004-09-21 | Darrell Price | Presealed system |
| DE102008024107A1 (en) * | 2008-05-17 | 2009-11-19 | Dekomte De Temple Kompensatortechnik Gmbh | compensator |
| JP2010276564A (en) * | 2009-06-01 | 2010-12-09 | Toshihisa Shirakawa | 920k superheated steam boiling water reactor |
| CN201862724U (en) * | 2010-09-01 | 2011-06-15 | 浙江跃进锻造有限公司 | Build-up welding mould |
| CN102748537B (en) * | 2011-04-19 | 2015-03-04 | 上海电缆研究所 | Seal run-through structure for extracting electric cables from enclosed container |
| CN104006692A (en) * | 2013-02-25 | 2014-08-27 | 泰州市瑞华化工设备制造有限公司 | Diameter-changing wave node heat exchange tube |
| CN203309873U (en) * | 2013-06-25 | 2013-11-27 | 中国船舶重工集团公司第七�三研究所 | Through-wall double-sealing structure of supercharged boiler |
| CN104633290A (en) * | 2013-11-13 | 2015-05-20 | 张文佳 | Through-wall structure for house solar water heating system through-wall pipe |
| JP5862646B2 (en) * | 2013-12-04 | 2016-02-16 | トヨタ自動車株式会社 | Refrigerant tube connection structure and inverter with built-in cooler |
| CN203839053U (en) * | 2014-02-27 | 2014-09-17 | 中国核电工程有限公司 | Protective sealed chamber applied to fractured mechanical penetration part |
| EP3088785A1 (en) * | 2015-04-27 | 2016-11-02 | Hilti Aktiengesellschaft | Flame retardant sleeve |
| CN110157081A (en) * | 2016-02-24 | 2019-08-23 | 张日龙 | A kind of building wall pipe |
| CN205716047U (en) * | 2016-04-27 | 2016-11-23 | 天津市热电设计院有限公司 | The valve well water-tight device of Direct-Buried Heating Pipeline |
| CN106064215A (en) * | 2016-06-03 | 2016-11-02 | 上海新闵（东台）重型锻造有限公司 | Nuclear power pressure vessel integration head pressing forming method |
| CN106090517A (en) * | 2016-08-22 | 2016-11-09 | 常州大学 | One outdoor water supply line defroster in winter |
| CN206097929U (en) * | 2016-09-23 | 2017-04-12 | 中广核工程有限公司 | Nuclear power station containment machinery penetration piece |
| CN206540455U (en) * | 2017-01-17 | 2017-10-03 | 重庆新太同金属有限公司 | Evaporation tube with ripple evaporator section |
| CN207337941U (en) * | 2017-05-24 | 2018-05-08 | 无锡市法兰锻造有限公司 | Complex phase penetration piece for nuclear power station |
| CN107894181A (en) * | 2017-10-30 | 2018-04-10 | 佛山汇众森泰科技有限公司 | A kind of novel energy-conserving powder cooling device |
| CN108566696B (en) * | 2018-01-02 | 2021-12-17 | 昆明理工大学 | Method for improving microwave heating temperature uniformity |
| CN108277603A (en) * | 2018-02-01 | 2018-07-13 | 泰州市恒丰染整设备有限公司 | Water-saving low energy consumption cold water roller |
| CN108344320A (en) * | 2018-04-09 | 2018-07-31 | 南通市华安超临界萃取有限公司 | The pipe dish strong for supercritical extract heat exchange performance |
| CN208111093U (en) * | 2018-04-19 | 2018-11-16 | 福建福清核电有限公司 | A kind of detachable and Quick pressing spare penetration piece of containment |
| CN208153966U (en) * | 2018-05-04 | 2018-11-27 | 河南亿阳工防科技有限公司 | A kind of polyurethane heat-insulation steel pipe |
| CN208452073U (en) * | 2018-06-13 | 2019-02-01 | 苏州五颗星特种超滤膜科技有限公司 | A kind of Novel static casting end socket |
-
2019
- 2019-02-15 CN CN201910118911.7A patent/CN109737244B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109737244A (en) | 2019-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108278369B (en) | Single-circulation flow guide plate type double water-cooling butterfly valve | |
| CN109737244B (en) | Nuclear power plant penetrating piece seal head and penetrating piece structure thereof | |
| CN203500770U (en) | Ice blockage device used for pipeline blockage | |
| CN103103622B (en) | A kind of water jacket that can work under the hot environment of single crystal furnace equipment for a long time | |
| CN211291121U (en) | Tubular cooler | |
| CN105673926A (en) | Ball valve | |
| CN206973035U (en) | A kind of ball valve for eliminating cavitation erosion | |
| CN210034485U (en) | Ultrahigh-temperature gate valve | |
| CN212226190U (en) | High temperature valve stuffing box cooling structure | |
| CN212455524U (en) | Vibration-resistant valve structure | |
| CN211315121U (en) | Lifting check valve with auxiliary positioning mechanism | |
| CN204226749U (en) | One fills profile shaft flow check valve | |
| CN108627025B (en) | Inlet pipe structure of condensate water tank | |
| CN203432411U (en) | Sleeve pipe heat exchanger | |
| CN201530838U (en) | Converter water-cooling multiple blowing multifunctional swivel joint | |
| CN211951591U (en) | Flow regulating valve for high-temperature fluid | |
| CN217465464U (en) | Spiral plate heat exchanger | |
| CN207713772U (en) | A kind of easy liquid medium stirring pneumatic device | |
| CN218883066U (en) | Outer valve stem tee bend angle seat valve and spout connection structure thereof | |
| CN216279512U (en) | High-sealing ball valve easy to assemble and disassemble | |
| CN206290800U (en) | A kind of high-temperature ball valve | |
| CN218377768U (en) | Straight tube plunger slide valve capable of being used for controlling on-off of nozzle | |
| CN212900388U (en) | Heat supply conveying pipeline of heating tank of chemical plant | |
| CN211288914U (en) | Two-way metal hard seal butterfly valve | |
| CN209146346U (en) | A kind of three-eccentric-butterfly-valve for capableing of noise reduction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |