CN209419884U - Tubular metal electric heating element pipe opening sealing structure - Google Patents
Tubular metal electric heating element pipe opening sealing structure Download PDFInfo
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- CN209419884U CN209419884U CN201822073682.5U CN201822073682U CN209419884U CN 209419884 U CN209419884 U CN 209419884U CN 201822073682 U CN201822073682 U CN 201822073682U CN 209419884 U CN209419884 U CN 209419884U
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- electric heating
- metal sleeve
- sealing structure
- heating element
- pipe opening
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Abstract
The utility model discloses a kind of tubular metal electric heating element pipe opening sealing structures, including metal sleeve, metal sleeve is internally provided with electric heating device, electric heating device includes the eduction rod positioned at metal sleeve nozzle section shaft core position, it is fixed on the heating wire for drawing nose, metal sleeve outer end is fixed with insulator, insulator is fixed in eduction rod outer end, sealing structure further includes that nozzle section is sequentially filled the inorganic seal being set between metal sleeve inner wall and eduction rod and organic sealant from inside to outside, it is characterized in that, metal sleeve nozzle section inner wall is provided with internal screw thread, it fills to internal screw thread the periphery of the inorganic seal and organic sealant.The utility model enables metal tube electrical heating elements preferably the advantages of high-pressure water body environment uses, improves Product Safety with can preferably improve sealing effect.
Description
Technical field
The utility model relates to a kind of tubular metal electrical heating elements；More particularly to a kind of tubular metal electrical heating elements
Ferrule structure.
Background technique
Tubular electrical heating element is widely used in electrical engineering, due to the lectrothermal alloy wire inside element must with it is outer
Portion keeps insulation, it is therefore desirable to seal to element.At present when sealing to electrical heating elements, organic or inorganic is mostly used
Material direct sealing, wherein the organic material used is mostly silicon rubber, but silicon rubber is easy aging after a period of use, therefore
The silicon rubber of sealing part is easy to produce crackle, cannot keep combining closely with metal pipe mouth, will cause the entrance of nozzle moisture in this way,
Insulation resistance is caused to decline；And since the operating temperature of electrical heating elements is usually at 200-400 DEG C, and silicon rubber normally makes
Temperature is at 250 DEG C or so, and silicon rubber is also difficult to keep the effect of insulated enclosure under this condition of high temperature.It also adopts at present
Electrical heating elements are directly sealed with inorganic material, such as enamel, but due to inorganic material itself brittleness it is larger, it is elastic compared with
Difference, sealing effect is undesirable, also be easy to cause seal failure.
Utility model disclosed in 201904925 U of patent CN that applicant once applied, once described a kind of tubular metal
Two machine double-layer sealing structure of electric heating element pipe opening, it is by being sintered the inorganic layer being set on electrical heating elements casing internal wall of pipe orifice
It is constituted with the organic layer being coated on the outside of the inorganic layer.Two machine double-layer sealing structures of the utility model solve electric heating
Element nozzle is combined since the problem of causing insulation resistance to decline cannot be fully sealed by using inorganic layer and organic layer
Double-layer structure, the characteristics of the thermal expansion coefficient of inorganic material can be utilized and heat tubing thermal expansion coefficient relatively, and can
To make full use of organic material, elasticity is good, the characteristic of good airproof performance, so that synthesis reaches good sealing effect, while also improving
Product quality so that the service life of electrical heating elements obviously increases, and has ensured the large scale equipment using electrical heating elements
It operates normally, and then reduces the rate of breakdown of equipment, safety also further increases.
Above-mentioned double-layer sealing structure can satisfy the seal request that electrical heating elements general environment uses, but when the electricity adds
Thermal element is used for the particular surroundings of some high pressure conditions, and (such as nuclear reactor tries when using in particular for the water body environment of high pressure
Test), own temperature changes also very greatly when due to electrical heating elements work and off working state switching, causes sealing material that can generate
Certain contraction distortion, and then lead to not the infiltration for resisting high-strength hydraulic pressure, outside water can enter tubular body from sealing place, lead
It causes short circuit to burn, and causes safety accident in turn.
Utility model content
In view of the above shortcomings of the prior art, the technical problem to be solved by the utility model is to how to provide a kind of energy
It is enough preferably to improve sealing effect, metal tube electrical heating elements are preferably used in high-pressure water body environment, improves and produces
The tubular metal electric heating element pipe opening sealing structure of product safety.
In order to solve the above-mentioned technical problem, the utility model uses the following technical solution:
A kind of tubular metal electric heating element pipe opening sealing structure, including metal sleeve, metal sleeve are internally provided with electricity
Heating structure, electric heating device include the eduction rod positioned at metal sleeve nozzle section shaft core position, are fixed on and draw nose
Heating wire, metal sleeve outer end are fixed with insulator, and insulator is fixed in eduction rod outer end, sealing structure further include nozzle section from
It is interior to the inorganic seal being set between metal sleeve inner wall and eduction rod and organic sealant is sequentially filled outside, feature exists
, metal sleeve nozzle section inner wall is provided with internal screw thread, the periphery of the inorganic seal and organic sealant is filled to interior
In screw thread.
In this way, the utility model in prior art basis, maintains secret envelope and inorganic sealing double-layer seal material
Sealing effect.Simultaneously because metal sleeve nozzle section inner wall is provided with internal screw thread, therefore when electrical heating elements are used for high-pressure water body ring
When border, even if sealing material generates local contraction deformation, due to the presence of internal screw thread, first is that improving sealing material and tube wall connects
Contacting surface product, second is that screw thread makes sealing material and tube wall contact direction, there are both directions, therefore even if some occurs for sealing material
The contact on another direction can still be maintained in contraction on direction.Therefore this makes it possible to become sealing material local contraction
Influence of the shape to leakproofness is preferably minimized.Better assure that leakproofness when high-pressure water body environment uses.
As optimization, the eduction rod, which is located on the part of nozzle section, is provided with external screw thread, the inorganic seal and has
It fills to external screw thread the inside of secret sealing.
In this way, further increasing the sealing effect between eduction rod and sealing material.
As optimization, metal sleeve nozzle goes out inner wall and is inwardly machined with a step, is embedded in step and is fixed with one
Metallic packing ring is enclosed, the insulator has an outside boss, the boss periphery pressure in the middle part of metal sleeve one end
It connects sealing to be fixed in metallic packing ring, boss surface and the contact of organic sealant.
In this way, further increasing the sealing effect at metal sleeve nozzle by the metallic packing ring of setting.
Further, eduction rod outer end fixation is pierced by insulator and forms wiring screw rod, and outer spiral shell is provided in wiring screw rod
Line is simultaneously screwed with clamp nut.
In this way, can exert a force by rotatably compressing nut to insulator, its inner end is made preferably to be connected to metal sleeve pipe
On mouth and preferably compressing metallic packing ring makes its deformation, thus to be tightly combined with insulator, joint filling material and tube wall, into
One step reinforces its sealing effect, makes insulating properties of the entire electrical heating elements under long-term storage condition and under high-pressure water body environment
It can greatly improve, guarantee sealing effect.
Further, gasket is additionally provided between clamp nut and insulator.Compression uniformity can be improved, preferably to protect
Demonstrate,prove sealing effect.
Still further, eduction rod front half section and heating wire are to the filling material for being additionally provided with insulation between metal sleeve inner wall
Material.
Insulation and leakproofness can be better ensured that in this way.
The packing material better choice is magnesium oxide material.With good insulating, the good advantage of heat conductivity.
Inorganic seal preferably uses enamel material.With low in cost, easy to set up, the good feature of sealing effect.
Organic sealant preferably uses silicon rubber or epoxide resin material.With low in cost, easy to set up, sealing effect
The good feature of fruit.
In conclusion the utility model, which has, can preferably improve sealing effect, enable metal tube electrical heating elements
Enough preferably the advantages of high-pressure water body environment uses, improves Product Safety.
Detailed description of the invention
Fig. 1 is the structural schematic diagram in specific embodiment of the present invention.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing.
When specific implementation: as shown in Figure 1, a kind of tubular metal electric heating element pipe opening sealing structure, including metal sleeve
1, metal sleeve 1 is internally provided with electric heating device, and electric heating device includes drawing positioned at metal sleeve nozzle section shaft core position
Stick 2 out are fixed on the heating wire 3 of 2 front end of eduction rod, and 1 outer end of metal sleeve is fixed with insulator 4, and 2 outer end of eduction rod is fixed on
Insulator 4, sealing structure further include that nozzle section is sequentially filled is set between metal sleeve inner wall and eduction rod from inside to outside
Inorganic seal 5 and organic sealant 6, wherein 1 nozzle section inner wall of metal sleeve is provided with internal screw thread 7, the inorganic seal
5 and the periphery of organic sealant 6 fill to internal screw thread.
In this way, the utility model in prior art basis, maintains secret envelope and inorganic sealing double-layer seal material
Sealing effect.Simultaneously because metal sleeve nozzle section inner wall is provided with internal screw thread, therefore when electrical heating elements are used for high-pressure water body ring
When border, even if sealing material generates local contraction deformation, due to the presence of internal screw thread, first is that improving sealing material and tube wall connects
Contacting surface product, second is that screw thread makes sealing material and tube wall contact direction, there are both directions, therefore even if some occurs for sealing material
The contact on another direction can still be maintained in contraction on direction.Therefore this makes it possible to become sealing material local contraction
Influence of the shape to leakproofness is preferably minimized.Better assure that leakproofness when high-pressure water body environment uses.
Wherein, the eduction rod 2, which is located on the part of nozzle section, is provided with external screw thread 8, the inorganic seal and organic
It fills to external screw thread the inside of sealant.
In this way, further increasing the sealing effect between eduction rod and sealing material.
Wherein, metal sleeve nozzle goes out inner wall and is inwardly machined with a step, is embedded in step and is fixed with circle gold
Belong to sealing ring 9, the insulator 4 has an outside boss, the boss periphery crimping in the middle part of 1 one end of metal sleeve
Sealing is fixed in metallic packing ring 9, boss surface and the contact of organic sealant.
In this way, further increasing the sealing effect at metal sleeve nozzle by the metallic packing ring of setting.
Wherein, 2 outer end of eduction rod fixation is pierced by insulator and forms wiring screw rod, and external screw thread is provided in wiring screw rod simultaneously
It is screwed with clamp nut 10.
In this way, can exert a force by rotatably compressing nut to insulator, its inner end is made preferably to be connected to metal sleeve pipe
On mouth and preferably compressing metallic packing ring makes its deformation, thus to be tightly combined with insulator, joint filling material and tube wall, into
One step reinforces its sealing effect, makes insulating properties of the entire electrical heating elements under long-term storage condition and under high-pressure water body environment
It can greatly improve, guarantee sealing effect.
Wherein, gasket 11 is additionally provided between clamp nut 10 and insulator.Compression uniformity can be improved, preferably to protect
Demonstrate,prove sealing effect.
Wherein, 2 front half section of eduction rod and heating wire 3 are to the packing material for being additionally provided with insulation between metal sleeve inner wall
12。
Insulation and leakproofness can be better ensured that in this way.
12 better choice of packing material is magnesium oxide material.With good insulating, the good advantage of heat conductivity.
Inorganic seal 5 preferably uses enamel material when implementation.With low in cost, easy to set up, sealing effect is good
Feature.
Organic sealant 6 preferably uses silicon rubber or epoxide resin material when implementation.With low in cost, it is easy to set
It sets, the good feature of sealing effect.
Claims (9)
1. a kind of tubular metal electric heating element pipe opening sealing structure, including metal sleeve, metal sleeve is internally provided with electricity and adds
Heat structure, electric heating device include the eduction rod positioned at metal sleeve nozzle section shaft core position, are fixed on the electricity for drawing nose
Heated filament, metal sleeve outer end are fixed with insulator, and insulator is fixed in eduction rod outer end, and sealing structure further includes nozzle section from interior
To the inorganic seal being set between metal sleeve inner wall and eduction rod and organic sealant is sequentially filled outside, feature exists
, metal sleeve nozzle section inner wall is provided with internal screw thread, the periphery of the inorganic seal and organic sealant is filled to interior
In screw thread.
2. a kind of tubular metal electric heating element pipe opening sealing structure as described in claim 1, which is characterized in that the extraction
Stick, which is located on the part of nozzle section, is provided with external screw thread, and the inside of the inorganic seal and organic sealant is filled to outer spiral shell
In line.
3. a kind of tubular metal electric heating element pipe opening sealing structure as described in claim 1, which is characterized in that metal sleeve
Nozzle goes out inner wall and is inwardly machined with a step, is embedded in step and is fixed with a circle metallic packing ring, the insulator face
To having an outside boss in the middle part of metal sleeve one end, the boss periphery crimping sealing is fixed in metallic packing ring,
Boss surface and the contact of organic sealant.
4. a kind of tubular metal electric heating element pipe opening sealing structure as claimed in claim 3, which is characterized in that outside eduction rod
End fixation is pierced by insulator and forms wiring screw rod, external screw thread is provided in wiring screw rod and is screwed with clamp nut.
5. a kind of tubular metal electric heating element pipe opening sealing structure as claimed in claim 4, which is characterized in that clamp nut
Gasket is additionally provided between insulator.
6. a kind of tubular metal electric heating element pipe opening sealing structure as described in claim 1, which is characterized in that before eduction rod
Half section and heating wire are to the packing material for being additionally provided with insulation between metal sleeve inner wall.
7. a kind of tubular metal electric heating element pipe opening sealing structure as claimed in claim 6, which is characterized in that packing material
It is magnesium oxide material.
8. a kind of tubular metal electric heating element pipe opening sealing structure as described in claim 1, which is characterized in that inorganic sealing
Layer uses enamel material.
9. a kind of tubular metal electric heating element pipe opening sealing structure as described in claim 1, which is characterized in that organic sealing
Layer uses silicon rubber or epoxide resin material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822073682.5U CN209419884U (en) | 2018-12-11 | 2018-12-11 | Tubular metal electric heating element pipe opening sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822073682.5U CN209419884U (en) | 2018-12-11 | 2018-12-11 | Tubular metal electric heating element pipe opening sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209419884U true CN209419884U (en) | 2019-09-20 |
Family
ID=67937829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822073682.5U Active CN209419884U (en) | 2018-12-11 | 2018-12-11 | Tubular metal electric heating element pipe opening sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209419884U (en) |
-
2018
- 2018-12-11 CN CN201822073682.5U patent/CN209419884U/en active Active
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