CN209149835U - Mineral insulated cable component - Google Patents

Abstract

The utility model relates to a kind of mineral insulated cable components, mineral insulated cable component includes having oversheath, the mineral insulated cable of intermediate insulator and core wire, the respective end of mineral insulated cable is equipped with sealing adaptor structure, sealing adaptor structure includes the end body being sleeved on outside the terminals of the core wire, the rear end welding of end body is sleeved on oversheath, switching weldering cup has been sintered to fix by glass cake in front of the terminals of the core wire in the body of end, the rear end of switching weldering cup is connect with the soldering terminals of the core wire, front end is change-over terminal, airtight and watertight padding chamber is disposed in glass cake rear in the body of end, insulating inorganic glue is perfused in airtight and watertight padding chamber to form the insulation encapsulated colloid of the corresponding core wire of sealed envelope and switching weldering cup.Insulation encapsulated colloid strengthens the sealing to end, improves the humidity resistance and reliability of mineral insulated cable component, and sintering quality is poor caused by avoiding oversheath and core wire direct sintering, and the poor situation of waterproofness occurs.

Description

Mineral insulated cable component

Technical field

The utility model relates to a kind of mineral insulated cable components.

Background technique

The core wire that mineral insulated cable generally includes mineral insulation and is built in mineral insulation, further includes outer encirclement Oversheath.All material is all made of metal and inorganic non-metallic material in mineral insulated cable, is free of any organic material, tool There are the characteristics such as excellent fire prevention, high temperature resistant, anti-vibration, corrosion-resistant.The material of mineral insulated cable Minerals insulator uses nothing Machine powder, such as magnesia, silica or aluminium oxide, these powder are very easy to absorb the moisture in air, especially oxygen Change magnesium and water can generate conductive magnesium hydroxide after chemically reacting.If the end of mineral insulated cable without sealing, Moisture is easy to be entered in mineral insulation by the end of mineral insulated cable, the insulation resistance of mineral insulated cable in the short time, The electrical specifications such as proof voltage will fall rapidly upon, and therefore, mineral insulated cable is in laid processes it should be specifically noted that at end seals Reason.

Traditional there are two ways to being sealed to end, one is real using organic elastic material or organic casting glue Existing end seals, but this method uses organic material easy to aging to service life of mineral insulated cable entirety, resistance to mildly may be used Influence is caused by property；Another kind is to be sintered together oversheath and core wire using glass sintering end, still, existing skill In art, the material of oversheath is usually stainless steel, and the material of core wire is copper, and the linear expansion coefficient difference of two kinds of materials is larger, Matching sintering can not be carried out, sintered end is caused gap easily occur, surface quality and sealing performance are difficult to ensure.

Utility model content

The purpose of this utility model is to provide a kind of mineral insulated cable components, to solve to utilize glass in the prior art Sintering processing is existing since cable cover(ing) and core wire material mismatch cause nothing when being sealed to mineral insulated cable end Method guarantees the technical issues of sintering quality.

To achieve the above object, the technical solution of the utility model mineral insulated cable component is: a kind of mineral insulation electricity Cable assembly, including the mineral insulated cable with oversheath, intermediate insulator and core wire, the respective end of mineral insulated cable is set There is sealing adaptor structure, sealing adaptor structure includes the end body being sleeved on outside the terminals of the core wire, end body Rear end welding is sleeved on oversheath, has been sintered to fix and has been turned by glass cake in front of the terminals of the core wire in the body of end Connect weldering cup, the rear end of switching weldering cup is connect with the soldering terminals of the core wire, front end is change-over terminal, in glass in the body of end Cake rear is disposed with airtight and watertight padding chamber, and insulating inorganic glue is perfused in airtight and watertight padding chamber to form the corresponding core wire of sealed envelope and switching Weld the insulation encapsulated colloid of cup.

The beneficial effects of the utility model are: mineral insulated cable component provided by the utility model includes mineral insulation electricity The rear end welding of cable and sealing adaptor structure, the end body in sealing adaptor structure is sleeved on oversheath, and front end passes through glass Glass cake has been sintered to fix switching weldering cup, and the rear of end body is disposed with airtight and watertight padding chamber, and airtight and watertight padding is intracavitary to be provided with insulation Encapsulating colloid.End body sealing welding is on oversheath, in actual sintered, selects the similar end body of linear expansion coefficient It is sintered with switching weldering cup, the sealing to mineral insulated cable end is realized by glass cake and switching weldering cup, prevents outside Moisture enter the end of mineral insulated cable, and weldering cup of transferring can draw core wire, it is convenient with external conducting wire or Equipment interface connection.Insulation encapsulated colloid strengthens the sealing to end, improves the humidity resistance of mineral insulated cable component And reliability, sintering quality is poor caused by avoiding oversheath and core wire direct sintering, and the poor situation of waterproofness occurs.

Further, the end body includes circumferentially being sealingly fitted to together to form the airtight and watertight padding chamber to welding Sintering body section and sealing body section, switching weldering cup is installed in sintering body section by the glass cake and welded with being formed Cup switching part.Switching weldering cup, sintering body section and glass cake are pre-installed to form weldering cup switching part, in practical set, only need By weldering cup switching part together with sealing body section assemble welding, assembling process is more convenient.

Further, the sealing body section includes the end cap that filler body section is sleeved on outside the oversheath with welding Body section, the filler body section and end cap body section circumferential direction welded seal are assembled together.Filler body section and end cap body Section is weldingly connected, and in practical set, end cap body section is individually welded on oversheath, ease of assembly.

Further, end cap body section includes end cap ontology and extends to the welding body section on oversheath, end cap ontology It is assembled together with filler body section circumferential direction welded seal.End cap body section includes welding body section, so that end cap body Duan Yan The outside for extending to oversheath increases the weld length between end cap body section and oversheath, guarantees welded seal performance.

Further, the rear end of the insulation encapsulated colloid extends the respective end for wrapping up the oversheath.Insulation encapsulated Colloid extends the respective end of package oversheath, can be completely closed the gap between oversheath and intermediate insulator, into one Step prevents external moisture to enter in intermediate insulator.

Further, the both ends of the mineral insulated cable are respectively equipped with the sealing adaptor structure.

Further, the end body is Stainless Steel Shell, and switching weldering cup is that the double end made of iron-nickel alloy welds cup. The linear expansion coefficient of stainless steel and iron-nickel alloy is close, can guarantee sintering quality.

Detailed description of the invention

Fig. 1 is the cross-sectional view of mineral insulated cable component provided by the utility model；

Fig. 2 is the exploded view of mineral insulated cable component provided by the utility model；

Fig. 3 is the exploded view that cup switching part is welded in Fig. 2；

Description of symbols: 100- mineral insulated cable；11- intermediate insulator；12- oversheath；13- core wire；200- is close Seal exchanging structure；The end 21- body；211- end cap body section；212- filler body section；213- is sintered body section；22- glass Cake；23- switching weldering cup；24- high-temperature insulation inorganic glue.

Specific embodiment

The embodiments of the present invention is described further with reference to the accompanying drawing.

The specific embodiment of the mineral insulated cable component of the utility model, as shown in Figure 1 to Figure 3.In the present embodiment Mineral insulated cable component can guarantee the normal work of mineral insulated cable suitable for harsh environment in harsh environment.

As shown in Figure 1, mineral insulated cable component includes mineral insulated cable 100, it further include being encapsulated in mineral insulation electricity The sealing adaptor structure 200 of 100 both ends end of cable, sealing adaptor structure 200 can be avoided external moisture and enter mineral insulation In cable 100, and it is connected to mineral insulated cable 100 and corresponding conducting wire, equipment.The structure of mineral insulated cable 100 is existing The content of technology, including the core wire 13, intermediate insulator 11 and oversheath 12 being sequentially arranged from the inside to the outside, in fact, this implementation Oversheath 12 in example is stainless steel sheath, and as seen from Figure 1, the both ends of core wire 13 extend to intermediate insulator 11 and outer shield The outside of set 12.Intermediate insulator 11 is made of powder.Since the structure of the sealing adaptor structure 200 at two is identical, this implementation The sealing adaptor structure 200 of wherein one end is only introduced in example.

As depicted in figs. 1 and 2, one end of the separate oversheath 12 and intermediate insulator 11 that define core wire 13 is front end.It is close Sealing exchanging structure 200 includes end body 21, and end body 21 is stainless steel metal material, and the inside of end body 21 forms Airtight and watertight padding chamber forms insulation encapsulated colloid in the intracavitary encapsulating high-temperature insulation inorganic glue 24 of airtight and watertight padding when assembling.

As shown in Fig. 2, end body 21 divide for successively weld together from back to front end cap body section 211, filler set Body section 212 and sintering body section 213, each section of seam crossing are sealed metal melting by laser welding, have excellent machinery Intensity and electromagnetic shielding performance.The rear end of end cap body section 211 sealing shroud by way of laser welding is mounted in oversheath 12 It is external.End cap body section 211 includes end cover body and extends to the end cap set on oversheath 12 it can be seen from Fig. 1 and Fig. 2 Body section, end cap body section are sleeved on the outside of oversheath 12 and are weldingly connected, and end cap body section extends cloth along oversheath 12 Set, can weld length between enlarged ends body 21 and oversheath 12, guarantee welded seal.

Glass cake 22 and switching weldering cup 23, the knot of glass cake 22 and switching weldering cup 23 are disposed in sintering body section 213 Structure is as shown in figure 3, switching weldering cup 23 is installed in glass cake 22.When assembling, switching weldering cup 23, glass cake 22 and sintering body Section 213 is integral sintered together, forms weldering cup switching part, can carry out insulated enclosure to airtight and watertight padding chamber, and realize electricity Gas switching.Since the material of switching weldering cup 23 is iron-nickel alloy, the material of sintering body section 213 is stainless steel, two kinds of materials Linear expansion coefficient is close, and matching sintering easy to accomplish, sintered mechanical sealing performance and electric property are good.The present embodiment In, sintering body section 213, glass cake 22 and switching weldering cup 23 are fitted together in advance, more in the assembling of mineral insulated cable component It is convenient.Switching weldering cup 23 in the present embodiment is that double end welds cup, and one end is connected with core wire 13, and the other end connects with conducting wire or equipment Mouth is connected.

The assembling process of the mineral insulated cable component of the utility model is as follows: by end cap body section 211 and filler Body section 212 covers on oversheath 12 in advance, with the mode of high temperature brazing will weld in cup switching part one end of switching weldering cup 23 with Core wire 13 is welded and fixed together, and guarantee core wire 13 is fixed and line conduction, then by filler body section 212 and sintering body section 213 laser weldings form airtight and watertight padding chamber, are resistant to 1300 °C of high-temperature insulation inorganic glue 24 in the intracavitary encapsulating of the airtight and watertight padding, It can be effectively isolated and fix core wire 13 after solidification, make that there is good insulation, resistance to shock between core wire 13.It can be with by Fig. 1 Find out, high-temperature insulation inorganic glue 24 wraps up the end of oversheath 12, can reinforce the sealing to intermediate insulator 11.It is exhausted in high temperature After edge inorganic glue 24 solidifies, end cap body section 211 is welded on the another of filler body section 212 by the way of laser welding Sealing is welded and fixed in end, the other end and oversheath 12 of end cap body section 211.

In the utility model, by using weldering cup switching part, filler body section 212, end cap body section 211 and high temperature One end of mineral insulated cable 100 is sealed encapsulation by insulating inorganic glue 24, prevents external moisture from entering mineral insulation electricity It contacts in cable 100 and with intermediate insulator 11 and reacts.Moreover, welding, cup switching part is integral sintered to be formed, and improves mineral The overall sealing performance of insulated cable component.High-temperature insulation inorganic glue 24 is not susceptible to aging, and switching weldering cup 23 can be by mineral Core wire 13 in insulated cable 100 is transferred out, is improved the high temperature resistant of mineral insulated cable component on the whole, service life, is resisted The performances such as irradiation, reliable shape.

In the present embodiment, end body 21 divide for weld together end cap body section 211,212 and of filler body section It is sintered body section 213, ease of assembly, in other embodiments, end body 21 can be the structure of monoblock type.

In other embodiments, sealing adaptor structure only can be set in wherein one end of mineral insulated cable.

Claims (7)

1. a kind of mineral insulated cable component, special including the mineral insulated cable with oversheath, intermediate insulator and core wire Sign is: the respective end of mineral insulated cable is equipped with sealing adaptor structure, and sealing adaptor structure includes being sleeved on the core wire Terminals outside end body, end body rear end welding is sleeved on oversheath, in the core wire in the body of end Switching weldering cup is sintered to fix by glass cake in front of terminals, the rear end of switching weldering cup and the soldering terminals of the core wire connect Connect, front end is change-over terminal, be disposed with airtight and watertight padding chamber in glass cake rear in the body of end, perfusion insulation nothing in airtight and watertight padding chamber Machine glue welds the insulation encapsulated colloid of cup to form the corresponding core wire of sealed envelope and switching.

2. mineral insulated cable component according to claim 1, it is characterised in that: the end body includes circumferential welding Ground is sealingly fitted to together sintering body section and sealing body section to form the airtight and watertight padding chamber, and the switching weldering cup passes through The glass cake is installed in sintering body section and welds cup switching part to be formed.

3. mineral insulated cable component according to claim 2, it is characterised in that: the sealing body section includes filler set Body section and welding are sleeved on the end cap body section outside the oversheath, and the filler body section and end cap body section are circumferentially welded It is sealingly fitted to together.

4. mineral insulated cable component according to claim 3, it is characterised in that: end cap body section include end cap ontology and The welding body section on oversheath is extended to, end cap ontology is assembled together with filler body section circumferential direction welded seal.

5. mineral insulated cable component according to any one of claim 1 to 4, it is characterised in that: the insulation encapsulated The rear end of colloid extends the respective end for wrapping up the oversheath.

6. mineral insulated cable component according to any one of claim 1 to 4, it is characterised in that: the mineral insulation The both ends of cable are respectively equipped with the sealing adaptor structure.

7. mineral insulated cable component according to any one of claim 1 to 4, it is characterised in that: the end body For Stainless Steel Shell, switching weldering cup is that the double end made of iron-nickel alloy welds cup.