CN107655581B - A kind of profound hypothermia gold iron thermocouple with thermometric ball - Google Patents
A kind of profound hypothermia gold iron thermocouple with thermometric ball Download PDFInfo
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- CN107655581B CN107655581B CN201710887438.XA CN201710887438A CN107655581B CN 107655581 B CN107655581 B CN 107655581B CN 201710887438 A CN201710887438 A CN 201710887438A CN 107655581 B CN107655581 B CN 107655581B
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- thermometric
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
- G01K7/023—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples provided with specially adapted connectors
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- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
A kind of profound hypothermia gold iron thermocouple with thermometric ball, the left end opening of axial cavity is arranged with a thermally conductive thermometric ball, the left end opening of axial cavity is the horn mouth gradually collapsed along axial direction from left end to right end, the end face diameter of bell-mouthed big opening end is equal with the diameter of the thermometric ball, the end face diameter at bell-mouthed osculum end is less than the diameter of the thermometric ball, and bell-mouthed inner wall is the conical surface；The left end of galvanic couple bar is arranged with the gland for being pressed on thermometric ball on the conical surface；Through-hole is offered on the gland, one end of through-hole is connect with the external world, and the other end of through-hole is directed at thermometric ball, and the aperture of through-hole is less than the diameter of thermometric ball；Thermocouple wire is coaxially equipped in axial cavity, the left end of low temperature glue stick contradicts on thermometric ball, and the right end of low temperature glue stick contradicts on the sealing-plug；The left end of thermocouple wire is connected with thermometric ball；The right end of thermocouple wire is through sealing-plug and compacting cap and extends outwardly.
Description
Technical field
The present invention relates to a kind of profound hypothermia gold iron thermocouple with thermometric ball.
Background technique
With the successful development and application of the development of domestic space technology, especially Long March series thrust-augmented rocket, push
The development of profound hypothermia (- 270 DEG C~0 DEG C) survey engineering.
To using liquid hydrogen as the space power system of fuel and the thermometric of fueling system, should use with respective capabilities
Profound hypothermia thermocouple product, it is desirable that have the features such as high measurement accuracy, high resistance to operating pressure, fast response time.
Domestic profound hypothermia gold iron thermocouple product used at present, can satisfy the technological parameter of aerospace industry substantially
It is required that but actual use process, there is also some defects for thermocouple product.
When especially measuring liquid hydrogen temperature, the material of low temperature glue DW-3 and even bar in thermocouple are due in profound hypothermia environment
Retractable property it is different, the shrinkage of the two is different, it is easy in the bonding of even bar inner wall and low temperature glue, low temperature glue and thermo wires glue
Place generates micro gap.And hydrogen atom is the smallest substance of nature, and it is easily permeable by these microcracks, to thermometric thermo wires
Adverse effect is generated, the thermoelectric voltage for causing it to generate is smaller, and system response time is slow, and the response time is long, reduces control
Precision；Meanwhile there is also very big security risks for the leakage of liquid hydrogen, adversely affect to aerospace control engineering, phase
Pass problem, it would be highly desirable to solve.
Summary of the invention
To overcome defect present in background technique, the present invention provides a kind of profound hypothermia gold iron thermoelectricity with thermometric ball
It is even.
Technical proposal that the invention solves the above-mentioned problems is:
A kind of profound hypothermia gold iron thermocouple with thermometric ball, the thermocouple includes galvanic couple bar, is set in the galvanic couple bar
The axial cavity for thering are both ends to penetrate through, and axial cavity wall surface is smooth；The galvanic couple bar is divided into thermometric section, sphere section along axial direction
And expansion arc, and the diameter of the expansion arc is greater than the diameter of the thermometric section, defines where galvanic couple bar axial direction thermometric section
One end is left end, and one end where expansion arc is right end；
The left end opening of the axial direction cavity is arranged with a thermally conductive thermometric ball, and the surface light of the thermometric ball
It is sliding；The left end opening of the axial direction cavity is the horn mouth gradually collapsed along axial direction from left end to right end, described bell-mouthed big
The end face diameter at mouth end is equal with the diameter of the thermometric ball, and the end face diameter at the bell-mouthed osculum end is less than the thermometric
The diameter of ball, and the bell-mouthed inner wall is the conical surface；The left end of the galvanic couple bar is arranged with for by the thermometric ball pressure
The tightly gland on the conical surface；Through-hole is offered on the gland, one end of the through-hole is connect with the external world, the through-hole
The other end is directed at the thermometric ball, and the aperture of through-hole is less than the diameter of the thermometric ball；
The right-end openings of the axial direction cavity are equipped with sealing-plug, and are arranged with outside the expansion arc for by the sealing-plug
The compacting cap being pressed in the cavity；
It is coaxially equipped with thermocouple wire in the axial direction cavity, and is filled out between the thermocouple wire and the inner wall of the axial cavity
Filled with low temperature glue, the inner wall of the thermocouple wire and the axial cavity is closely coupled by low temperature glue；The low temperature adhesive curing of filling
At low temperature glue stick, the left end of the low temperature glue stick is contradicted on the thermometric ball, and the right end of the low temperature glue stick is contradicted described
On sealing-plug；
The left end of thermocouple wire is connected with thermometric ball, constitutes measurement end；The right end of thermocouple wire is through sealing-plug and is compacted cap simultaneously
Extend outwardly, and be located at expansion arc in the thermocouple wire be equipped with housing, and the right end of the housing through sealing-plug,
Compacting cap simultaneously extends outwardly；The compacting cap, which is equipped with, supplies the perforative opening of the thermocouple wire, is coaxially provided with bullet in the opening
Spring, and the left end of the spring is fastened in the opening, the thermocouple wire coaxially runs through the spring.
Further, the expansion arc is externally provided with the first external screw thread, and the inner wall of the compacting cap is equipped with the first internal screw thread, institute
It states compacting cap and is spirally connected with the expansion arc by the externally threaded cooperation of the first internal screw thread and first.
Further, the clamp nut for external world's connection, the clamp nut and the ball are fixed with outside the sphere section
Body section is fixedly connected.
Further, for the sphere section equipped with a circle snap ring, the clamp nut is interior to be equipped with card slot, the sphere section and compression
Nut is connected and fixed by the snap ring and the card slot.
Further, the sealing-plug includes the axial direction part extended in axial cavity and outside axial cavity and is sticked
Radial section in the right-end openings of axial cavity, the axial direction part are fixed at the center of the radial section；The outer diameter of axial direction part
It is equal with the diameter of axial cavity, to seal the right-end openings of the axial cavity；The outer peripheral surface of the radial section is contradicted in institute
On the inner wall for stating compacting cap, to be compressed by the compacting cap.
Further, the left end of the measuring section is externally provided with the second external screw thread, and the inner wall of the gland is equipped with the second screw thread,
The gland is spirally connected with the measuring section by the externally threaded cooperation of the second internal screw thread and second.
Further, the thermometric ball is golden iron-nickel-chromium ball.
Further, the centre of sphere of ball, and the through-hole and the axial cavity are measured described in the central axial alignment of the through-hole
Coaxial arrangement.
Further, the measurement ball is equipped with the jack for being inserted into the thermocouple wire.
Beneficial effects of the present invention are mainly manifested in:
By the present invention in that replacing welding thermometric described in background technology to connect with the measurement ball of golden iron-nickel-chromium production
Head not only improves sealing performance, but also does not influence bearing capacity, improves the safety of product, and production process is simple, favorably
In its popularization and use.
Detailed description of the invention
Fig. 1 is cross-sectional view of the invention.
Fig. 2 is the cooperation schematic diagram of the left end opening of axial cavity, thermometric ball and gland.
Specific embodiment
Referring to attached drawing, a kind of profound hypothermia gold iron thermocouple with thermometric ball, the thermocouple includes galvanic couple bar 1, described
Axial cavity equipped with both ends perforation in galvanic couple bar 1, and the wall surface of axial cavity is smooth；The galvanic couple bar 1 successively divides along axial direction
For thermometric section a, sphere section 4 and expansion arc c, and the diameter of the expansion arc c is greater than the diameter of the thermometric section a, defines along electricity
One end where the axial thermometric section a of even bar is left end, and one end where expansion arc c is right end；
The left end opening of the axial direction cavity is arranged with a thermally conductive thermometric ball 10, and the surface of the thermometric ball 10
It is smooth；The left end opening of the axial direction cavity is the horn mouth 12 gradually collapsed along axial direction from left end to right end, the horn mouth
The end face diameter of 12 big opening end is equal with the diameter of the thermometric ball 10, and the end face diameter at the osculum end of the horn mouth 12 is small
In the diameter of the thermometric ball 10, and the inner wall of the horn mouth 12 is the conical surface；The left end of the galvanic couple bar 1, which is arranged with, to be used for
The gland 11 thermometric ball 10 being pressed on the conical surface；Through-hole 13 is offered on the gland 11, the through-hole 13
One end is connect with the external world, and the other end of the through-hole 13 is directed at the thermometric ball 10, and the aperture of through-hole 13 is less than the thermometric
The diameter of ball 10；Liquid nitrogen is contacted by through-hole 13 with thermometric ball 10, and measurement accuracy is increased.
The right-end openings of the axial direction cavity are equipped with sealing-plug 6, and are arranged with outside the expansion arc c for will be described close
Blocking 6 is pressed on the compacting cap 7 in the cavity；
Thermocouple wire 2 is coaxially equipped in the axial direction cavity, and between the thermocouple wire 2 and the inner wall of the axial cavity
Filled with low temperature glue, the inner wall of the thermocouple wire 2 and the axial cavity is closely coupled by low temperature glue；The low temperature glue of filling is solid
It is melted into low temperature glue stick 3, the left end of the low temperature glue stick 3 contradicts on the thermometric ball 10, and the right end of the low temperature glue stick 10 supports
Touching is on the sealing-plug 6；
The left end of thermocouple wire 2 is connected with thermometric ball 10, to constitute measurement end；The right end of thermocouple wire 2 is through sealing-plug 6 and pressure
Real cap 7 simultaneously extends outwardly, and the thermocouple wire 2 being located in expansion arc c is equipped with housing 5, and the right end of the housing 5
Through sealing-plug 6 and compacting cap 7 and extend outwardly；
The compacting cap 7, which is equipped with, supplies the perforative opening of the thermocouple wire 2, is coaxially provided with spring 8, and institute in the opening
The left end for stating spring 8 is fastened in the opening, and the thermocouple wire 2 coaxially runs through the spring 8；
The expansion arc c is externally provided with the first external screw thread, and the inner wall of the compacting cap 7 is equipped with the first internal screw thread, the pressure
Real cap 7 is spirally connected with the expansion arc c by the externally threaded cooperation of the first internal screw thread and first.
The clamp nut 4 for external world's connection is fixed with outside the sphere section b, the compression spiral shell 4 and sphere section b is solid
Fixed connection.
The sphere section b is equipped with a circle snap ring, is equipped with card slot, the sphere section b and clamp nut in the clamp nut 4
4 are connected and fixed by the snap ring and the card slot.
The sealing-plug 6 includes the axial direction part that extends in axial cavity and outside axial cavity and is sticked axially logical
Radial section in the right-end openings of chamber, the axial direction part are fixed at the center of the radial section；The outer diameter and axial direction of axial direction part
The diameter of cavity is equal, to seal the right-end openings of the axial cavity；The outer peripheral surface of the radial section is contradicted in the compacting
On the inner wall of cap 7, to be compressed by the compacting cap 7.
The left end of the measuring section a is externally provided with the second external screw thread, and the inner wall of the gland 11 is equipped with the second screw thread, described
The gland 11 and measuring section a is spirally connected by the externally threaded cooperation of the second internal screw thread and second.
The thermometric ball 10 is golden iron-nickel-chromium ball.
The centre of sphere of ball 10 is measured described in the central axial alignment of the through-hole 13, and the through-hole 13 and the axial cavity are same
Axis setting.
The measurement ball 10 is equipped with the jack for being inserted into the thermocouple wire 2.
Need to carry out its inner wall polishing and pickling before the installation of galvanic couple bar 1 to keep smooth.Galvanic couple bar 1 is placed vertically, and
Thermocouple wire 2 is put into galvanic couple bar 1, thermocouple wire 2 should be fixed on 1 central axis of galvanic couple bar, and the connection of thermocouple wire 2 measures ball 10, and
Gland 11 is tightened to block measurement ball 10, then inject low temperature glue into galvanic couple bar 1, after filling, whole device is put into and is added
Hot stove 60 DEG C or so ambient cure 8 hours, carry out that room temperature is cooling, this process need to repeat 3-4 times later.Low temperature glue is fully cured
Low temperature glue stick 3 is formed afterwards, and thermocouple wire 2, low temperature glue stick 3 and galvanic couple bar 1 are bonded into an entirety.Then, clamp nut 4 is consolidated
Surely it is set at sphere section b, to be connect with external device；It fills in sealing-plug 6, put on compacting cap 8, and successively by thermocouple wire 2
Across sealing-plug 6, compacting cap 7 and spring 8.Compacting cap 8 is tightened, the assembling of thermocouple main part can be completed.
After the completion of assembling product, it is necessary to detect temperature measurement accuracy, whole leakproofness and response time etc. in liquid hydrogen environment
Characteristic.If there is the problems such as thermometric end loosens, liquid hydrogen is revealed, tightening nuts 10 can be continued, and be put into liquid hydrogen environment again
Detection, until satisfactory technological parameter.
Action principle of the invention are as follows:
Two thermocouple wires 2 are generally equipped in existing galvanic couple bar, two thermocouple wires 2 are before penetrating galvanic couple bar 1, thermometric end
Two spot welding of thermocouple wire 2 method be welded together to form welding thermometric connector.
By the present invention in that replacing welding thermometric described in background technology to connect with the measurement ball of golden iron-nickel-chromium production
Head not only improves sealing performance, but also does not influence bearing capacity, improves the safety of product, and production process is simple, favorably
In its popularization and use.It in the environment of cryogenic high pressure, avoids hydrogen atom and continues to permeate, adverse effect is generated to thermocouple wire, is caused
The thermoelectric voltage for generating it is smaller, reduces measurement accuracy, extends the service life of thermocouple wire.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection of the invention
Range should not be construed as being limited to the specific forms stated in the embodiments, and protection scope of the present invention also includes art technology
Personnel conceive according to the present invention it is conceivable that equivalent technologies mean.
Claims (9)
1. a kind of profound hypothermia gold iron thermocouple with thermometric ball, it is characterised in that: the thermocouple includes galvanic couple bar, the electricity
Axial cavity equipped with both ends perforation in even bar, and axial cavity wall surface is smooth；The galvanic couple bar is divided into thermometric along axial direction
Section, sphere section and expansion arc, and the diameter of the expansion arc is greater than the diameter of the thermometric section, defines along galvanic couple bar axial direction thermometric
One end where section is left end, and one end where expansion arc is right end；
The left end opening of the axial direction cavity is arranged with a thermally conductive thermometric ball, and the surface of the thermometric ball is smooth；Institute
The left end opening for stating axial cavity is the horn mouth gradually collapsed along axial direction from left end to right end, the bell-mouthed big opening end
End face diameter is equal with the diameter of the thermometric ball, and the end face diameter at the bell-mouthed osculum end is less than the straight of the thermometric ball
Diameter, and the bell-mouthed inner wall is the conical surface；The left end of the galvanic couple bar is arranged with for the thermometric ball to be pressed on institute
State the gland on the conical surface；Through-hole is offered on the gland, one end of the through-hole is connect with the external world, the other end of the through-hole
It is directed at the thermometric ball, and the aperture of through-hole is less than the diameter of the thermometric ball；
The right-end openings of the axial direction cavity are equipped with sealing-plug, and are arranged with outside the expansion arc for compressing the sealing-plug
Compacting cap in the cavity；
It is coaxially equipped with thermocouple wire in the axial direction cavity, and is filled between the thermocouple wire and the inner wall of the axial cavity
The inner wall of low temperature glue, the thermocouple wire and the axial cavity is closely coupled by low temperature glue；The low temperature glue of filling is solidified into low
The left end of warm glue stick, the low temperature glue stick contradicts on the thermometric ball, and the right end of the low temperature glue stick is contradicted in the sealing
Beyond the Great Wall；
The left end of thermocouple wire is connected with thermometric ball, constitutes measurement end；The right end of thermocouple wire is through sealing-plug and compacting cap and outside
The thermocouple wire for extending, and being located in expansion arc is equipped with housing, and the right end of the housing is through sealing-plug, compacting
Cap simultaneously extends outwardly；The compacting cap, which is equipped with, supplies the perforative opening of the thermocouple wire, is coaxially provided with spring in the opening, and
The left end of the spring is fastened in the opening, and the thermocouple wire coaxially runs through the spring.
2. a kind of profound hypothermia gold iron thermocouple with thermometric ball as described in claim 1, it is characterised in that: the expansion arc
It is externally provided with the first external screw thread, the inner wall of the compacting cap is equipped with the first internal screw thread, and the compacting cap passes through with the expansion arc
First internal screw thread and the first externally threaded cooperation are spirally connected.
3. a kind of profound hypothermia gold iron thermocouple with thermometric ball as claimed in claim 2, it is characterised in that: the sphere section
It is fixed with the clamp nut for external world's connection outside, the clamp nut is fixedly connected with the sphere section.
4. a kind of profound hypothermia gold iron thermocouple with thermometric ball as claimed in claim 3, it is characterised in that: the sphere section
Equipped with a circle snap ring, card slot is equipped in the clamp nut, the sphere section and clamp nut pass through the snap ring and the card
Slot connects and fixes.
5. a kind of profound hypothermia gold iron thermocouple with thermometric ball as claimed in claim 4, it is characterised in that: the sealing-plug
Including the axial direction part extended in axial cavity and outside axial cavity and the diameter that is sticked in the right-end openings of axial cavity
To section, the axial direction part is fixed at the center of the radial section；The outer diameter of axial direction part is equal with the axial diameter of cavity, with close
Seal the right-end openings of the axial cavity；The outer peripheral surface of the radial section contradicts on the inner wall of the compacting cap, with described
Cap is compacted to compress.
6. a kind of profound hypothermia gold iron thermocouple with thermometric ball as claimed in claim 5, it is characterised in that: the thermometric section
Left end be externally provided with the second external screw thread, the inner wall of the gland is equipped with the second screw thread, and the gland passes through with the thermometric section
Second internal screw thread and the second externally threaded cooperation are spirally connected.
7. a kind of profound hypothermia gold iron thermocouple with thermometric ball as claimed in claim 6, it is characterised in that: the thermometric ball
For golden iron-nickel-chromium ball.
8. a kind of profound hypothermia gold iron thermocouple with thermometric ball as claimed in claim 7, it is characterised in that: the through-hole
The centre of sphere of thermometric ball described in central axial alignment, and the through-hole and the axial cavity are coaxially disposed.
9. a kind of profound hypothermia gold iron thermocouple with thermometric ball as claimed in claim 8, it is characterised in that: the thermometric ball
It is equipped with the jack for being inserted into the thermocouple wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710887438.XA CN107655581B (en) | 2017-09-27 | 2017-09-27 | A kind of profound hypothermia gold iron thermocouple with thermometric ball |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710887438.XA CN107655581B (en) | 2017-09-27 | 2017-09-27 | A kind of profound hypothermia gold iron thermocouple with thermometric ball |
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| Publication Number | Publication Date |
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| CN107655581A CN107655581A (en) | 2018-02-02 |
| CN107655581B true CN107655581B (en) | 2019-11-29 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1278619A1 (en) * | 1985-01-16 | 1986-12-23 | Предприятие П/Я А-3759 | Method for manufacturing hot joint of thermocouple |
| CN2588345Y (en) * | 2002-09-12 | 2003-11-26 | 浙江春晖智能控制股份有限公司 | Temp. sensing agent filler for membrane box |
| CN101590455A (en) * | 2009-06-22 | 2009-12-02 | 施才军 | The gondola water faucet of self power generation light indicating water temperature |
| CN202614403U (en) * | 2012-03-29 | 2012-12-19 | 绍兴春晖自动化仪表有限公司 | Deep hypothermia thermocouple having high pressure-resisting performance and high precision |
| CN205426353U (en) * | 2016-03-08 | 2016-08-03 | 昆山优利德能源技术有限公司 | Gasifier high temperature thermocouple |
| CN207335898U (en) * | 2017-09-27 | 2018-05-08 | 浙江工业大学 | A kind of profound hypothermia gold iron thermocouple with thermometric ball |
-
2017
- 2017-09-27 CN CN201710887438.XA patent/CN107655581B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1278619A1 (en) * | 1985-01-16 | 1986-12-23 | Предприятие П/Я А-3759 | Method for manufacturing hot joint of thermocouple |
| CN2588345Y (en) * | 2002-09-12 | 2003-11-26 | 浙江春晖智能控制股份有限公司 | Temp. sensing agent filler for membrane box |
| CN101590455A (en) * | 2009-06-22 | 2009-12-02 | 施才军 | The gondola water faucet of self power generation light indicating water temperature |
| CN202614403U (en) * | 2012-03-29 | 2012-12-19 | 绍兴春晖自动化仪表有限公司 | Deep hypothermia thermocouple having high pressure-resisting performance and high precision |
| CN205426353U (en) * | 2016-03-08 | 2016-08-03 | 昆山优利德能源技术有限公司 | Gasifier high temperature thermocouple |
| CN207335898U (en) * | 2017-09-27 | 2018-05-08 | 浙江工业大学 | A kind of profound hypothermia gold iron thermocouple with thermometric ball |
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| CN107655581A (en) | 2018-02-02 |
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