CN-122025721-A - Filling method of deep hole heat-conducting glue

CN122025721ACN 122025721 ACN122025721 ACN 122025721ACN-122025721-A

Abstract

The invention provides a filling method of deep hole heat-conducting glue, and relates to the field of heat pipe micro-stack fuels. The filling method comprises the steps of vertically arranging a base pipe, and vertically arranging pipe holes on the base pipe. A blocking rod extends into the bottom end of the pipe hole to block the lower section of the pipe hole. And filling heat-conducting glue into the pipe holes from the top ends of the pipe holes. And installing a charging funnel at the top end of the pipe hole, and supplementing heat conducting glue to the pipe hole through the charging funnel until the heat conducting glue is over the top end of the pipe hole. The heating rod is inserted into the pipe hole from top to bottom through the liquid adding funnel, and is pushed downwards, so that the heating rod pushes the heat conducting glue, and the blocking rod is pushed to move downwards until the lower end of the heating rod is flush with the bottom end of the pipe hole.

Inventors

LU JUNQIANG
ZHU ZHIHUA
ZHANG WEI
LIN JIWEI
XU ZHIJUN
CHEN ZHIDONG
LUO WUXI
WU XINHUA
XI JIAYI
LIU JUNYANG

Assignees

上海核工程研究设计院股份有限公司
上海电气核电设备有限公司

Dates

Publication Date: 20260512
Application Date: 20260225

Claims (10)

1. The filling method of the deep hole heat-conducting glue is characterized by comprising the following steps of: vertically arranging a base pipe, wherein pipe holes on the base pipe are vertically arranged; A blocking rod extends into the bottom end of the pipe hole to block the middle section and the lower section of the pipe hole; Filling heat-conducting glue into the pipe holes from the top ends of the pipe holes; installing a filling funnel at the top end of the pipe hole, and supplementing heat-conducting glue to the pipe hole through the filling funnel; And a heating rod is inserted into the pipe hole from top to bottom through the liquid adding funnel, and is pushed downwards, so that the heating rod pushes the heat conducting glue, and the blocking rod is pushed to move downwards until the lower end of the heating rod is flush with the bottom end of the pipe hole.
2. The method for filling deep hole heat conducting glue according to claim 1, wherein before filling the heat conducting glue into the pipe holes, the heat conducting glue is placed in a thermostatic chamber to be preheated to room temperature.
3. The filling method of deep hole heat-conducting glue according to claim 1, further comprising mixing the heat-conducting glue, and injecting the mixed heat-conducting glue into a glue gun for filling, wherein the mixing the heat-conducting glue comprises: The powder component and the liquid component are mixed in proportion, and the mixture is manually stirred in the same direction for at least 2 minutes until the powder component is dissolved, and then stirred by an electric stirrer for at least 3 minutes.
4. The filling method of the deep hole heat-conducting glue according to claim 1, wherein the axial height of the pipe hole is 150 cm-160 cm, and the distance from the bottom end of the pipe hole to the top end of the plugging rod and the top end of the pipe hole is 10 cm-15 cm.
5. The method for filling deep hole heat-conducting glue according to claim 1, wherein the heat-conducting glue is filled into the pipe hole from the top end of the pipe hole, and the shaking of the blocking rod is controlled at the same time, so that the reserved space in the pipe hole is filled with the heat-conducting glue.
6. The method of filling deep hole heat conductive paste according to claim 1, wherein the heat conductive paste is kept in the filling funnel during the period of inserting the heating rod from top to bottom into the tube hole through the filling funnel.
7. The method for filling deep hole heat conducting glue according to claim 1, wherein the heat conducting glue overflows from the bottom end of the pipe hole after the heat conducting glue is pushed by the heating rod, and the overflowed heat conducting glue is recovered.
8. The filling method of deep hole heat-conducting glue according to claim 1, wherein the base pipe is provided with a plurality of pipe holes, and some of the pipe holes which do not need to be filled with the heat-conducting glue are plugged.
9. The method for filling deep hole heat-conducting glue according to claim 1, wherein the base pipe is provided with a plurality of pipe holes, wherein some pipe holes are correspondingly provided with different heating rods, and the number and the resistance value of the heating rods are confirmed before the heating rods are inserted into the pipe holes.
10. The filling method of deep hole heat conducting glue according to any one of claims 1-9, wherein the filling method is suitable for filling heat conducting glue with an annular gap with axial height of 150 cm-160 cm and radial width of 0.02 mm-0.2 mm, the annular gap being defined between the pipe hole wall and the heating rod located in the pipe hole.

Description

Filling method of deep hole heat-conducting glue Technical Field The invention relates to the field of heat pipe micro-stack fuel, in particular to a filling method of deep hole heat-conducting glue. Background In the design of a heat pipe micro-stack fuel assembly, a micro gap (typically about 0.1mm in size) exists between a base pipe hole and an electric heating rod, and high-performance heat-conducting glue needs to be filled to optimize heat transfer performance. The traditional filling method (such as direct injection or manual filling) is difficult to adapt to the working condition of a long pipe hole or an ultra-long pipe hole (such as 1550 mm), so that various defects are caused, for example, the heat conducting glue is difficult to completely fill the clearance of the pipe hole, bubbles are easy to generate, the filling is uneven, the waste of filling materials is caused, and the like. The root cause of the heat-conducting glue is that the length of the pipe hole is far larger than the size of the gap, the flowing resistance of the glue solution is large, the heat-conducting glue is difficult to uniformly cover the whole gap, and the heat transfer efficiency between the substrate and the electric heating rod is easy to be reduced, and hot spots are easily formed. The existing method lacks systematic tools and standardized steps, and the filling operation is highly dependent on manual experience, so that quality fluctuation is easy to cause. The consequences resulting from this include reduced heat transfer efficiency (localized hot spot formation). Therefore, there is a need to develop a method of filling a thermal paste suitable for small gaps in long tubular holes. Disclosure of Invention The invention at least aims to provide a filling method of deep hole heat-conducting glue, which is suitable for filling heat-conducting glue in small gaps of long pipe holes. The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later. One embodiment of the invention provides a filling method of deep hole heat-conducting glue, which comprises the following steps: and the base pipes are vertically arranged, and pipe holes on the base pipes are vertically arranged. A blocking rod extends into the bottom end of the pipe hole to block the middle section and the lower section of the pipe hole. And filling heat-conducting glue into the pipe holes from the top ends of the pipe holes. And an addition funnel is arranged at the top end of the pipe hole, and the heat conducting glue is supplemented to the pipe hole through the addition funnel. The heating rod is inserted into the pipe hole from top to bottom through the liquid adding funnel, and is pushed downwards, so that the heating rod pushes the heat conducting glue, and the blocking rod is pushed to move downwards until the lower end of the heating rod is flush with the bottom end of the pipe hole. In some embodiments, the heat transfer gel is placed in a thermostatic chamber to be preheated to room temperature before filling the tube holes with the heat transfer gel. In some embodiments, the filling method further comprises mixing the heat-conducting glue, and injecting the mixed heat-conducting glue into a glue gun for filling. The mixed heat-conducting glue comprises: The powder component and the liquid component are mixed in proportion, and the mixture is manually stirred in the same direction for at least 2 minutes until the powder component is dissolved, and then stirred by an electric stirrer for at least 3 minutes. In some embodiments, the axial height of the tube hole is 150 cm-160 cm, and the distance from the bottom end of the tube hole to the top end of the plugging rod and the top end of the tube hole is 10 cm-15 cm. In some embodiments, the heat-conducting glue is filled into the pipe hole from the top end of the pipe hole, and meanwhile, the shaking of the blocking rod is controlled, so that the heat-conducting glue fills the reserved space in the pipe hole. In some embodiments, the heat-conductive gel is maintained in the addition funnel during top-down insertion of the heater rod through the addition funnel into the tube bore. In some embodiments, the heat conducting glue overflows from the bottom end of the pipe hole after being pushed by the heating rod, and the overflowed heat conducting glue is recovered. In some embodiments, the base pipe is provided with a plurality of pipe holes, and certain pipe holes of the plurality of pipe holes are plugged without filling heat-conducting glue. In some embodiments, the base pipe is provided wit