CN103090988A - Sheathed thermocouple junction box and sealing method thereof - Google Patents
Sheathed thermocouple junction box and sealing method thereof Download PDFInfo
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- CN103090988A CN103090988A CN2012105799971A CN201210579997A CN103090988A CN 103090988 A CN103090988 A CN 103090988A CN 2012105799971 A CN2012105799971 A CN 2012105799971A CN 201210579997 A CN201210579997 A CN 201210579997A CN 103090988 A CN103090988 A CN 103090988A
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- thermo wires
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Abstract
The invention belongs to the technology of sheathed thermocouple sealing, and relates to a sheathed thermocouple junction box and a sealing method of the sheathed thermocouple junction box. The sheathed thermocouple junction box comprises transfer thermo wires, a socket, a flange, fillings, an installing plate and a sleeve pipe, wherein the socket is arranged on the flange, the installing plate is arranged under the flange to form a sealing space, and the sleeve pipe is arranged at the bottom of the installing plate, the sleeve pipe is connected with a thermode. thermode thermo wires are connected with the transfer thermo wires, the transfer thermo wires are connected with the socket, the socket is connected with the junction box, the transfer thermo wires are sealed inside the installing plate which is filled by the fillings. The sheathed thermocouple junction box enables the sheathed thermocouple to be metal sealed completely, enhances sealing, damp and hot resistance, and resistance to electromagnetic interference, adopts inorganic nonmetallic materials to fill the junction box to fix the thermo wires, prolongs service life and enhances reliability of the thermocouple. Besides, the sheathed thermocouple is light and handy in structure.
Description
Technical field
The invention belongs to the armoured thermocouple encapsulation technology, relate to a kind of armoured thermocouple terminal box and encapsulating method thereof.
Background technology
The extension line mode of tradition armoured thermocouple as shown in Figure 1, the thermo wires of sheathed cable 6 and 3 welding of switching thermo wires, solder joint is fixing by alundum cement 5, and in surperficial sintering enamel powder 4 sealings, the switching thermo wires other end and compensating wire 1 welding, solder joint is fixed by glass fiber tape 2 colligations.The shortcoming of this structure has 2 points: a) compensating wire is easily thrown off after using with the solder joint of switching thermo wires is long-term; B) this structure is the non-tight structure, and the easy moisture absorption in porcelain glaze powder surface, cause the thermopair insulation resistance to descend under hygrothermal environment.
Summary of the invention
The objective of the invention is: a kind of armoured thermocouple terminal box that can effectively improve thermopair sealing and reliability is provided.
In addition, the present invention also provides the encapsulating method of this armoured thermocouple terminal box.
Technical scheme of the present invention is: a kind of armoured thermocouple terminal box, and it comprises switching thermo wires, socket, ring flange, inserts, installing plate and sleeve pipe, wherein, socket is arranged on ring flange, installing plate is arranged under ring flange, consists of enclosure space, and sleeve pipe is arranged on bottom installing plate, described sleeve pipe is connected with thermode, the thermode thermo wires is connected with the switching thermo wires, and the switching thermo wires is connected with socket, and socket is connected with terminal box, the switching thermo wires is encapsulated in installing plate, and is filled by inserts.
The solder joint of switching thermo wires is crooked along switching silk direction.
Described installing plate is made of pressing plate and bonnet.
Described sleeve pipe connects by argon arc welding with thermode, and the thermode thermo wires is connected by argon arc welding with the switching thermo wires, and the switching thermo wires is connected with socket by soldering, and socket is connected with terminal box by argon arc welding.
The opening for welding switching silk and shaping is left in the terminal box both sides.
Switching thermo wires string diameter is greater than thermode thermo wires string diameter.
A kind of armoured thermocouple encapsulating method, it comprises the steps:
A) terminal box cavity structure assembling
First use argon arc welding mounting flange, installing plate, sleeve pipe and thermode, with soldering gang socket and switching silk, then socket is connected with ring flange by argon arc welding;
B) switching thermo wires shaping
Be connected by argon arc welding with the sheathed cable thermo wires after the other end shaping of switching silk, the solder joint after shaping is crooked along switching silk direction;
C) embedding
Carry out under vibration condition, with inserts embedding switching thermo wires, after embedding finishes with pressing plate with the inserts compacting;
D) sealing pressing plate
First sealing part pressing plate during the sealing pressing plate, then baking, rear taking-up to be dried be sealing residue weld seam immediately.
Described inserts is the electrically molten magnesia powder, carries out the roasting impurity elimination before embedding.
During sealing pressing plate sealing, first sealing 3/4, then remain at sealing after the oven dry.
Technique effect of the present invention is: with respect to traditional armoured thermocouple encapsulation technology, armoured thermocouple terminal box of the present invention and method for packing thereof have following advantage:
A) make the armoured thermocouple all-metal sealing, strengthen its sealing, humidity resistance and anti-electromagnetic interference (EMI);
B) adopt Inorganic Non-metallic Materials to fill fixedly thermo wires of terminal box, strengthen the life and reliability of thermopair;
C) make the armoured thermocouple structure light and handy.
Description of drawings
Fig. 1 is the structural representation of prior art armoured thermocouple terminal box;
Fig. 2 is the front view of armoured thermocouple terminal box of the present invention;
Fig. 3 is the left view of armoured thermocouple terminal box;
Wherein, 1 is compensating wire, and 2 is glass fiber tape, and 3 are the switching thermo wires, and 4 is the enamel powder, and 5 is alundum cement, and 6 is sheathed cable, and 7 is socket, and 8 is ring flange, and 9 is pressing plate, and 10 is bonnet, and 11 is inserts, and 12 is installing plate, and 13 is sleeve pipe.
Embodiment
Below by specific embodiment, the present invention is described in detail:
Please consult simultaneously Fig. 2 and Fig. 3, armoured thermocouple terminal box of the present invention comprises switching thermo wires 3, socket 7, ring flange 8, pressing plate 9, bonnet 10, inserts 11, installing plate 12 and sleeve pipe 13.Wherein, socket 7 is welded on socket 7, and pressing plate 9 and bonnet 10 welding consist of installing plate, and weld with ring flange 8.Described sleeve pipe 13 connects by argon arc welding with thermode, and switching thermo wires 3 is connected with socket 7 by soldering, and socket 7 is connected with terminal box by argon arc welding; The thermode thermo wires is connected by argon arc welding with switching thermo wires 3, and is encapsulated in installing plate 12, and is filled by inserts.
The below provides the encapsulating method of armoured thermocouple terminal box of the present invention, and its concrete steps are as follows:
A) terminal box cavity structure assembling
This product thermode has four thermo wires to transfer, so terminal box need stay both-side opening to be convenient to welding switching silk and shaping.First use argon arc welding mounting flange, installing plate, sleeve pipe and thermode, with soldering gang socket and switching silk, then socket is connected with ring flange by argon arc welding.
B) switching thermo wires shaping.
Due to the restriction of terminal box cavity size, the other end of switching silk need be by being connected by argon arc welding with the sheathed cable thermo wires after the special tooling shaping, and the solder joint after shaping needs from shell outside the distance of regulation, to guarantee the insulation resistance of thermopair.Greater than thermode thermo wires string diameter, be the intensity of solder joint after the assurance shaping due to switching silk string diameter, with special tooling, that solder joint is crooked along switching silk direction during shaping.
C) embedding magnesia powder
The present invention selects the electrically molten magnesia powder, needs roasting in 800 ℃ of crucible ovens before embedding, to remove impurity and the crystalline hydrate in powder.Be to guarantee the compacted density of magnesia powder, with the quality of electronic scales weighing product, can fully fill terminal box for making magnesia powder before and after embedding, embedding needs carry out under vibration condition, after embedding finishes with pressing plate with the magnesia powder compacting.
D) sealing pressing plate
During due to powder filling, magnesia powder may the moisture absorption, and then first sealing 3/4 pressing plate during the sealing pressing plate is placed in assembly in 250 ℃ of baking ovens and is incubated, and rear taking-up to be dried is sealing residue weld seam immediately.
The armoured thermocouple that the present invention assembles after tested, the normal temperature insulation resistance is ∞, high temperature (650 ℃) insulation resistance is more than 5M Ω, and passed through the high temperature storage, hot operation, low tempertaure storage, low-temperature working, temperature shock, temperature of GJB150 regulation-highly, vibration, impact, acceleration, damp heat test, and passed through the electromagnetic compatibility test of GJB151A regulation.In addition, thermopair has also passed through the Reliability Enhancement Testing of 120h, and wherein the vibration level in integrated environment stress is up to 50g.After test, terminal box is decomposed, it is loose that magnesia powder has no, and therefore thermo wires solder joint no abnormality seen has significant technical progress with respect to the conventional package technology.
Claims (9)
1. armoured thermocouple terminal box, it is characterized in that: comprise switching thermo wires (3), socket (7), ring flange (8), inserts (11), installing plate (12) and sleeve pipe (13), wherein, socket (7) is arranged on ring flange (8), installing plate (12) is arranged under ring flange (8), consist of enclosure space, sleeve pipe (13) is arranged on bottom installing plate (12), described sleeve pipe (13) is connected with thermode, the thermode thermo wires is connected with switching thermo wires (3), switching thermo wires (3) is connected with socket (7), socket (7) is connected with terminal box, switching thermo wires (3) is encapsulated in installing plate (12), and filled by inserts.
2. armoured thermocouple terminal box according to claim 1 is characterized in that: the solder joint of switching thermo wires (3) is crooked along switching silk direction.
3. armoured thermocouple terminal box according to claim 2 is characterized in that: described installing plate (12) is made of pressing plate (9) and bonnet (10).
4. armoured thermocouple terminal box according to claim 2, it is characterized in that: described sleeve pipe (13) connects by argon arc welding with thermode, the thermode thermo wires is connected by argon arc welding with switching thermo wires (3), switching thermo wires (3) is connected with socket (7) by soldering, and socket (7) is connected with terminal box by argon arc welding.
5. armoured thermocouple terminal box according to claim 3 is characterized in that: the opening for welding switching silk and shaping is left in terminal box both sides.
6. armoured thermocouple terminal box according to claim 1 is characterized in that: switching thermo wires (3) string diameter is greater than thermode thermo wires string diameter.
7. an armoured thermocouple encapsulating method, is characterized in that, comprises the steps:
A) terminal box cavity structure assembling
First use argon arc welding mounting flange, installing plate, sleeve pipe and thermode, with soldering gang socket and switching silk, then socket is connected with ring flange by argon arc welding;
B) switching thermo wires shaping
Be connected by argon arc welding with the sheathed cable thermo wires after the other end shaping of switching silk, the solder joint after shaping is crooked along switching silk direction;
C) embedding
Carry out under vibration condition, with inserts embedding switching thermo wires, after embedding finishes with pressing plate with the inserts compacting;
D) sealing pressing plate
First sealing part pressing plate during the sealing pressing plate, then baking, rear taking-up to be dried be sealing residue weld seam immediately.
8. armoured thermocouple encapsulating method according to claim 7, is characterized in that, described inserts (11) is the electrically molten magnesia powder, carries out the roasting impurity elimination before embedding.
9. armoured thermocouple encapsulating method according to claim 7, is characterized in that, during sealing pressing plate (9) sealing, first sealing 3/4, then remain at sealing after the oven dry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105799971A CN103090988A (en) | 2012-12-27 | 2012-12-27 | Sheathed thermocouple junction box and sealing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105799971A CN103090988A (en) | 2012-12-27 | 2012-12-27 | Sheathed thermocouple junction box and sealing method thereof |
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| Publication Number | Publication Date |
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| CN103090988A true CN103090988A (en) | 2013-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012105799971A Pending CN103090988A (en) | 2012-12-27 | 2012-12-27 | Sheathed thermocouple junction box and sealing method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105651408A (en) * | 2015-12-22 | 2016-06-08 | 苏州长风航空电子有限公司 | Aero-engine exhaust gas temperature sensor |
| CN107560744A (en) * | 2017-09-26 | 2018-01-09 | 无锡英罗唯森科技有限公司 | Thermometer bushing device |
| CN107607213A (en) * | 2017-10-20 | 2018-01-19 | 浙江春晖仪表股份有限公司 | A kind of thermocouple that function is reinforced with antidetonation insulation |
| CN108181014A (en) * | 2017-12-13 | 2018-06-19 | 苏州长风航空电子有限公司 | A kind of output terminal combined labyrinth and carbon gland method of aviation thermocouple temperature sensor |
| CN109556750A (en) * | 2019-01-23 | 2019-04-02 | 浙江泰索科技有限公司 | A kind of high temperature resisting thermocouple exhaust gas temperature sensor |
| CN109709451A (en) * | 2018-12-07 | 2019-05-03 | 苏州长风航空电子有限公司 | A kind of minimizing technology and identification method of armoured thermocouple cable internal moisture |
| CN110702249A (en) * | 2019-11-19 | 2020-01-17 | 安徽青润精密科技有限公司 | Armored thermocouple junction box and sealing method thereof |
Citations (4)
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| US3699200A (en) * | 1970-03-19 | 1972-10-17 | Atomic Energy Commission | High-resistance electrical conductor encapsulation |
| CN2529418Y (en) * | 2001-12-27 | 2003-01-01 | 吴兴华 | Thermmocouple, thermal resistance connection box |
| CN201327420Y (en) * | 2009-02-11 | 2009-10-14 | 乐清市伦特仪表有限公司 | Multi-point sealing low-temperature flexibility thermocouple device in LNG and LPG tank areas |
| KR20100002792U (en) * | 2008-09-01 | 2010-03-10 | 우진 일렉트로나이트(주) | Elements for detecting temperature of engine exhaust gas |
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2012
- 2012-12-27 CN CN2012105799971A patent/CN103090988A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3699200A (en) * | 1970-03-19 | 1972-10-17 | Atomic Energy Commission | High-resistance electrical conductor encapsulation |
| CN2529418Y (en) * | 2001-12-27 | 2003-01-01 | 吴兴华 | Thermmocouple, thermal resistance connection box |
| KR20100002792U (en) * | 2008-09-01 | 2010-03-10 | 우진 일렉트로나이트(주) | Elements for detecting temperature of engine exhaust gas |
| CN201327420Y (en) * | 2009-02-11 | 2009-10-14 | 乐清市伦特仪表有限公司 | Multi-point sealing low-temperature flexibility thermocouple device in LNG and LPG tank areas |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105651408A (en) * | 2015-12-22 | 2016-06-08 | 苏州长风航空电子有限公司 | Aero-engine exhaust gas temperature sensor |
| CN107560744A (en) * | 2017-09-26 | 2018-01-09 | 无锡英罗唯森科技有限公司 | Thermometer bushing device |
| CN107607213A (en) * | 2017-10-20 | 2018-01-19 | 浙江春晖仪表股份有限公司 | A kind of thermocouple that function is reinforced with antidetonation insulation |
| CN107607213B (en) * | 2017-10-20 | 2024-05-14 | 浙江春晖仪表股份有限公司 | Thermocouple with shock-resistant insulation reinforcement function |
| CN108181014A (en) * | 2017-12-13 | 2018-06-19 | 苏州长风航空电子有限公司 | A kind of output terminal combined labyrinth and carbon gland method of aviation thermocouple temperature sensor |
| CN109709451A (en) * | 2018-12-07 | 2019-05-03 | 苏州长风航空电子有限公司 | A kind of minimizing technology and identification method of armoured thermocouple cable internal moisture |
| CN109556750A (en) * | 2019-01-23 | 2019-04-02 | 浙江泰索科技有限公司 | A kind of high temperature resisting thermocouple exhaust gas temperature sensor |
| CN109556750B (en) * | 2019-01-23 | 2024-02-20 | 浙江泰索科技有限公司 | High-temperature-resistant thermocouple exhaust temperature sensor |
| CN110702249A (en) * | 2019-11-19 | 2020-01-17 | 安徽青润精密科技有限公司 | Armored thermocouple junction box and sealing method thereof |
| CN110702249B (en) * | 2019-11-19 | 2020-12-29 | 安徽青润精密科技有限公司 | Armored thermocouple junction box and sealing method thereof |
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Application publication date: 20130508 |