Penetration piece sintering mold with wear function prompting function

Abstract

The invention discloses a penetration piece sintering mold with an abrasion function prompting function, and relates to the technical field of nuclear reactor electrical penetration piece manufacturing. The sintering mold is mainly provided with the flow guide grooves. Liquid glass is guided into the mold through the first flow guide groove and the second flow guide groove to be sintered, and glass-metal sealing is completed; and meanwhile, the wear degree of the mold diversion trench can prompt the durability of the whole mold, and replacement is prompted in time. The design of the diversion trenches improves the sintering stability and uniformity of the electrical penetration assembly, ensures the adaptability of the electrical penetration assembly to different working conditions, and improves the reliability and safety of the electrical penetration assembly. And meanwhile, replacement is prompted in time by prompting the abrasion degree, and the mold precision is guaranteed. The existence of the diversion trench reduces the thermal expansion of the die and reduces the error of the die.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nuclear reactor electrical penetration assembly manufacturing, in particular to a sintering mold with wear function prompt. BACKGROUND

[0002] The electrical penetration assembly is a special device installed on the wall of the reactor containment, which is used for the safe penetration of cables. It must ensure the sealing integrity of the reactor containment under normal operation and various extreme accident conditions (such as earthquakes, loss of coolant accidents, etc.), prevent the leakage of radioactive substances, and ensure the continuity of electrical and signal transmission between the inside and outside of the containment, which is the core component of maintaining the safe operation of the reactor.

[0003] The traditional electrical penetration assembly is prone to embrittlement and creep aging in harsh environments such as high temperature, high pressure, high humidity, and high radiation due to the inherent properties of organic materials during long-term operation, which leads to failure of sealing and insulation functions and poses a safety hazard. In contrast, the electrical penetration assembly using glass-metal packaging has stronger anti-aging ability due to the properties of inorganic non-metallic materials, and is not easily affected by environmental factors. This design can effectively avoid sealing failure caused by material aging during long-term operation, thereby providing more reliable sealing performance under extreme conditions and significantly reducing the risk of radioactive material leakage, providing more reliable protection for the safe operation of the reactor.

[0004] Currently, the glass-metal packaging technology is gradually replacing traditional organic materials as the mainstream solution for electrical penetration assemblies due to its excellent anti-aging performance. However, the sintering mold relied on by this technology still has two major bottleneck problems: poor flow uniformity, and the liquid glass needs to flow accurately into the inner cavity of the mold during high-temperature sintering. The traditional mold lacks an optimized flow structure, leading to uneven material distribution, easy production of bubbles or local defects, directly affecting the packaging density, and thus threatening the long-term sealing reliability of the electrical penetration assembly; the wear state cannot be monitored in real time, and the mold will continue to wear during repeated high-temperature and high-pressure sintering. The existing mold does not have a built-in wear indication mechanism, and it is difficult for the operator to quantitatively evaluate the degree of wear of the key parts (such as the flow structure), often requiring disassembly for detection or relying on experience. This easily leads to two risks: premature replacement causing resource waste, or overuse causing precision decline (such as uncontrolled thermal expansion), ultimately degrading the sintering quality. Therefore, there is an urgent need for a structurally innovative sintering mold: the flow groove needs to accurately control the flow path of the liquid glass to ensure uniform filling and reduce defects; a built-in intuitive wear prompt mechanism is needed to actively warn of the life of the mold and avoid production risks caused by precision degradation.

[0005] For the electrical through hole which needs glass-metal sintering, the sintering mold needs to keep precision in extreme environment, and to make liquid sintering material evenly distributed in the mold, reduce sintering defects and bubbles. At the same time, there needs to be a clearer and simpler way to prompt the sintering mold durability, to ensure the mold precision. SUMMARY

[0006] The purpose of the present application is to provide a wear function prompt through hole sintering mold, which has the characteristics of strong adaptability, high safety and high sealing, can effectively improve the sintering quality, prolong the service life of the mold, and reduce the production risk caused by the wear of the mold.

[0007] To achieve the above purpose, the technical scheme adopted by the present application is:

[0008] A wear function prompt through hole sintering mold, comprising a mold body, a first flow guide groove, a second flow guide groove, a flow guide groove along, and a flow guide groove wear prompt line.

[0009] Optionally, the mold body is made of silicon nitride material.

[0010] Optionally, the surface of the mold body has a silicon nitride micro-nano structure material coating; the silicon nitride micro-nano structure material coating has a surface energy of less than 20 mN / m, and a thermal conductivity of 300-600 W / m·K, the thickness of the silicon nitride micro-nano structure material coating is controlled between 10-50 microns, and is prepared by chemical vapor deposition or physical vapor deposition process.

[0011] Optionally, the first flow guide groove and the second flow guide groove are integrally formed with the mold body, the outer side of the mold body is provided with the first flow guide groove, 8 first flow guide grooves are arranged along the outer surface of the mold body at an interval of 100 mm, and 5 second flow guide grooves are arranged along the groove part of the mold body at an interval of 30 mm, for guiding the liquid sintering material to be evenly distributed in the inner cavity of the mold body.

[0012] Optionally, the cross-sectional shape of the first flow guide groove and the second flow guide groove is a semicircle with a radius decreasing from the outer edge to the inner edge, the bottom width is greater than the top width, and the depth gradually decreases from the outer edge to the edge of the mold body, the outer edge depth is 4 mm, and the inner edge depth is 2.5 mm, forming a gradual change structure.

[0013] Optionally, the outer side of the first flow guide groove and the second flow guide groove is provided with a flow guide groove side, the flow guide groove side is used for limiting the flow range of the liquid sintering material in the first flow guide groove and the second flow guide groove, the width is 98 mm, and the seven flow guide groove sides are uniformly and equally spaced. The cross-sectional shape of the first flow guide groove and the second flow guide groove is trapezoidal or semicircular, the bottom width is greater than the top width, so as to increase the flow channel area of the liquid sintering material and further promote the uniform distribution of the liquid sintering material. The depth of the flow guide groove gradually decreases from the outer side to the inner side of the mold body, forming a gradient structure, so that the liquid sintering material can be more uniformly dispersed to each part of the mold body during the flow process, while reducing the local overheating phenomenon caused by the concentration of the liquid material, further improving the sintering quality and the service life of the mold.

[0014] Optionally, the flow guide groove wear prompt line is four parallel groove-shaped lines, and the color gradually changes from red brown to deep red brown from the outside to the inside; the groove depth of the prompt line is 45-55 microns, and the width is 180-220 microns; the color gradient is achieved by gradually increasing the average particle size of the iron oxide powder (alpha-Fe2O3) from 1.3-1.7 microns of the first prompt line on the outside to 3.7-4.3 microns of the fourth prompt line on the inside; the flow guide groove wear prompt line adopts a double-layer structure: the inner layer is a color developing material body layer composed of wear-resistant iron red material; the outer layer is a transparent enamel protective layer with a thickness of 10-20 microns and a melting point of >1600 DEG C; when the prompt line is worn, the color of the prompt line changes obviously, so that the operator can find and replace the mold in time.

[0015] Optionally, the flow guide groove wear prompt line mark is on the mold body on the side of the flow guide groove side; the flow guide grooves are sequentially arranged on the mold body, so that the liquid sintering material can be uniformly arranged in the mold.

[0016] The inner surface of the mold body is provided with a micro-nano structure coating, which has the characteristics of low surface energy and high thermal conductivity, can significantly reduce the adhesion between the liquid sintering material and the inner surface of the mold, and quickly conduct heat to ensure uniform distribution of heat during the sintering process. The thickness of the micro-nano structure coating is 10-50 microns, which is prepared by chemical vapor deposition or physical vapor deposition process, further improving the anti-adhesion performance and thermal stability of the mold, prolonging the service life of the mold, and improving the surface quality and size precision of the electrical penetrating part.

[0017] The wear function prompt penetrating part sintering mold provided by the application has the following beneficial effects:

[0018] 1. By setting the flow guide groove (i.e. the first flow guide groove and the second flow guide groove) on the mold body, the flow of liquid sintering material can be effectively guided to be uniformly distributed in the mold cavity, avoiding sintering defects caused by uneven material distribution, significantly improving the sintering quality, and the success rate of sealing is increased to more than 99%, the dimensional accuracy deviation is controlled within ±0.05mm, and the surface defect rate is reduced to less than 2%.

[0019] 2. The design of the flow guide groove not only limits the flow range of the liquid sintering material to prevent it from overflowing, but also further optimizes the distribution of the material through its shape and structure design, ensuring that it is uniformly arranged within the ideal range of the mold, further improving the sintering effect.

[0020] 3. The setting of the flow guide groove wear prompt line provides an intuitive indication for the wear monitoring of the mold. When the mold is worn to a certain extent, the color of the prompt line will change significantly, reminding the operator to check or replace the mold in time, avoiding production accidents caused by excessive wear of the mold, and improving the reliability and safety of production.

[0021] 4. The mold body, flow guide groove and flow guide groove are made of high-strength, high-temperature-resistant materials, ensuring the stability and durability of the mold during the sintering process; the flow guide groove wear prompt line is made of wear-resistant and color-developing materials, which can maintain color stability in high-temperature environment, accurately prompt the replacement time, and the service life of the mold can reach more than 1500 hours in actual test. The cross-sectional shape and gradient structure design of the flow guide groove further optimize the flow and distribution of the liquid sintering material, reduce the local overheating phenomenon, prolong the service life of the mold, and improve the sintering efficiency and product quality.

[0022] 5. The micro-nano structure coating on the inner surface of the mold has the characteristics of low surface energy and high thermal conductivity, the thickness of the micro-nano structure coating is 10-50 microns, which is prepared by chemical vapor deposition or physical vapor deposition process, which can significantly reduce the adhesion between the liquid sintering material and the inner surface of the mold, and quickly conduct heat to ensure uniform distribution of heat during the sintering process, further improving the sintering quality, prolonging the service life of the mold, and improving the surface quality and dimensional accuracy of the electrical penetrating part. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0024] Figure 1A schematic view of a through-penetrating sintering mold with wear function prompt according to an embodiment of the present application is shown in FIG. 1.

[0025] Figure 2 A schematic view of a through-penetrating sintering mold with wear function prompt according to an embodiment of the present application is shown in FIG. 1. Figure 1 A schematic view of a through-penetrating sintering mold with wear function prompt according to an embodiment of the present application is shown in FIG. 1.

[0026] Figure 3 A schematic view of a through-penetrating sintering mold with wear function prompt according to an embodiment of the present application is shown in FIG. 1. Figure 1 A schematic view of a through-penetrating sintering mold with wear function prompt according to an embodiment of the present application is shown in FIG. 1.

[0027] Figure 4 A schematic view of a through-penetrating sintering mold with wear function prompt according to an embodiment of the present application is shown in FIG. 1. Figure 1 A schematic view of a through-penetrating sintering mold with wear function prompt according to an embodiment of the present application is shown in FIG. 1.

[0028] Figure 5 A schematic view of a through-penetrating sintering mold with wear function prompt according to an embodiment of the present application is shown in FIG. 1. Figure 1 A schematic view of a through-penetrating sintering mold with wear function prompt according to an embodiment of the present application is shown in FIG. 1.

[0029] FIG. 1 is a schematic view of a through-penetrating sintering mold with wear function prompt according to an embodiment of the present application. DETAILED DESCRIPTION

[0030] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0032] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0033] In the description of the present application, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the present application is used, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0034] In addition, the terms "first", "second", etc. are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "provided", "connected" and the like should be understood broadly, for example, "connected" can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0037] The overall structure, working principle and technical effects of the sintering mold of the electrical through-piece with guide grooves and wear prompting function provided by the present application will be described in detail below through examples and in combination with the accompanying drawings.

[0038] A sintering mold of a through-piece with wear function prompting is disclosed in the present embodiment, comprising: a mold body 1, a first guide groove 2, a second guide groove 3, a guide groove along 4, and a guide groove wear prompting line 5.

[0039] Reference Figure 1 The mold body 1 is made of silicon nitride material.

[0040] Further, the surface of the mold body 1 has a micro-nano structure coating of silicon nitride material; the silicon nitride micro-nano structure material coating has a surface energy less than 20 mN / m and a thermal conductivity of 300-600 W / m·K, the thickness of the silicon nitride micro-nano structure material coating is controlled between 10-50 microns, and is precisely prepared by chemical vapor deposition (CVD) or physical vapor deposition (PVD) process, which can significantly reduce the adhesion between the liquid sintering material and the inner surface of the mold, while quickly conducting heat to ensure uniform distribution of heat during the sintering process.

[0041] Further, the silicon nitride micro-nano structure material coating is prepared by a chemical vapor deposition or physical vapor deposition process, further improving the anti-adhesion performance and thermal stability of the mold, prolonging the service life of the mold, and improving the surface quality and dimensional accuracy of the electrical penetrating member.

[0042] Reference Figure 2 The first flow guide groove 2 and the second flow guide groove 3 are integrally formed with the mold body 1. The outer side of the mold body 1 is provided with the first flow guide groove 2, which is arranged in 8 rows along the outer surface of the mold body 1 at an interval of 100 mm. The second flow guide groove 3 is arranged in 5 rows along the groove part of the mold body 1 at an interval of 30 mm, for guiding the liquid sintering material to be evenly distributed in the inner cavity of the mold body 1. In production, the first flow guide groove 2 is arranged along the outer surface of the mold body 1, and the second flow guide groove 3 is arranged along the groove part of the mold body 1 at an interval of 30 mm.

[0043] Further, the cross-sectional shape of the first flow guide groove 2 and the second flow guide groove 3 is a semicircle with a radius that decreases from the outer edge to the inner edge. The bottom width is greater than the top width, and the depth gradually decreases from the inner edge at the outer edge of the mold body 1 to the inner edge. The outer edge depth is 4 mm, and the inner edge depth is 2.5 mm, forming a gradual change structure. This allows the liquid sintering material to be more evenly distributed to each part of the mold body 1 during the flow process, while reducing the local overheating phenomenon caused by the concentration of liquid material, further improving the sintering quality and the service life of the mold.

[0044] Further, the outer side of the first flow guide groove 2 and the second flow guide groove 3 is provided with a flow guide groove along 4. The flow guide groove along 4 is used to limit the flow range of the liquid sintering material in the first flow guide groove 2 and the second flow guide groove 3. The width is 98 mm, and 7 flow guide grooves along 4 are evenly and equally spaced to ensure that the liquid sintering material can be evenly arranged in the ideal range of the mold body 1, thereby improving the sintering quality.

[0045] Further, the flow guide groove wear prompt line 5 is 4 parallel grooved lines, and the color gradually changes from red-brown to deep red-brown from the outside to the inside. The groove depth of the prompt line is 45-55 μm, and the width is 180-220 μm. The average particle size of the iron oxide powder (α-Fe2O3) of the first prompt line from the outside gradually increases to 3.7-4.3 μm of the fourth prompt line from the inside to realize the color gradient. The flow guide groove wear prompt line 5 adopts a double-layer structure: the inner layer is a chromogenic material body layer composed of wear-resistant iron red material, and the outer layer is a transparent enamel protective layer with a thickness of 10-20 μm and a melting point of >1600℃.

[0046] Further, the color developing material can clearly show under natural light without special light conditions, so that the operator can quickly identify the wear state of the mold in daily operation.

[0047] Through the above embodiment, the application provides a kind of wear function prompt through-piece sintering mold, can effectively improve sintering quality, prolong the service life of mold, and reduce the production risk caused by mold wear.

Claims

1. A through-piece sintering die with a wear function indicator, characterized in that: The invention comprises a mold body (1), a first guide groove (2), a second guide groove (3), a guide groove edge (4), and a guide groove wear prompt line (5).

2. The wear function prompt through-piece sintering mold according to claim 1, characterized in that: The mold body (1) is made of silicon nitride material.

3. The wear function prompt through-piece sintering mold according to claim 1 or 2, characterized in that: The surface of the mold body (1) is coated with a silicon nitride micro-nanostructure material; The silicon nitride micro-nanostructure material coating has a surface energy of less than 20mN / m and a thermal conductivity of 300-600W / m·K. The thickness of the silicon nitride micro-nanostructure material coating is controlled between 10-50 microns and is prepared by chemical vapor deposition or physical vapor deposition process.

4. The wear function prompt through-piece sintering mold according to claim 3, characterized in that: The first guide groove (2) and the second guide groove (3) are integrally formed with the mold body (1); the first guide groove (2) is provided on the outside of the mold body (1); eight first guide grooves (2) are arranged at intervals of 100 mm along the outer surface of the mold body (1); and five second guide grooves (3) are arranged at intervals of 30 mm along the groove portion of the mold body (1), for guiding the liquid sintering material to be evenly distributed in the inner cavity of the mold body (1).

5. The sintering die for a through-piece with a wear function indication according to claim 4, characterized in that: The cross-sectional shape of the first guide groove (2) and the second guide groove (3) is a semicircle whose radius decreases from the outer edge to the inner edge, the bottom width is greater than the top width, and the depth gradually decreases from the outer edge to the inner edge of the mold body (1), the outer edge depth is 4 mm, and the inner edge depth is 2.5 mm, forming a gradual structure.

6. The sintering die for a through-piece with a wear function indication according to claim 5, characterized in that: A guide groove edge (4) is provided on the outside of the first guide groove (2) and the second guide groove (3). The guide groove edge (4) is used to limit the flow range of the liquid sintering material in the first guide groove (2) and the second guide groove (3). The width of the guide groove edge (4) is 98 mm, and the seven guide groove edges (4) are evenly distributed at equal intervals.

7. The sintering die for a through-piece with a wear function indication according to claim 6, characterized in that: The guide groove wear warning line (5) is composed of four parallel groove-shaped lines, the color of which changes from reddish brown to dark reddish brown from the outside to the inside. The depth of the warning line groove is 45-55 μm, and the width is 180-220 μm. The color gradient is achieved by the average particle size of the iron oxide powder (α-Fe2O3) of the first outer warning line being 1.3-1.7 μm, and the average particle size gradually increases inward to 3.7-4.3 μm of the fourth inner warning line. The guide groove wear warning line (5) adopts a double-layer structure: the inner layer is a color-developing material body layer, which is composed of wear-resistant iron red material; the outer layer is a transparent enamel protective layer, which has a thickness of 10-20 μm and a melting point of more than 1600°C.

8. The sintering die for a through-piece with a wear function indication according to claim 7, characterized in that: The first guide groove (2), the second guide groove (3) and the mold body (1) are arranged on the mold body (1) after being formed, the edge of the guide groove is the guide groove edge (4), and the guide groove wear prompt line (5) is marked on the mold body (1) on the side of the guide groove edge (4).

Images