CN109029755A - Method for improving the proof armored platinum resistor thermometer response time - Google Patents
Method for improving the proof armored platinum resistor thermometer response time Download PDFInfo
- Publication number
- CN109029755A CN109029755A CN201810554441.4A CN201810554441A CN109029755A CN 109029755 A CN109029755 A CN 109029755A CN 201810554441 A CN201810554441 A CN 201810554441A CN 109029755 A CN109029755 A CN 109029755A
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- temperature
- vacuum
- product
- vacuum chamber
- flange
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/16—Special arrangements for conducting heat from the object to the sensitive element
- G01K1/18—Special arrangements for conducting heat from the object to the sensitive element for reducing thermal inertia
-
- 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
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
Abstract
The invention discloses a kind of methods for improving the proof armored platinum resistor thermometer response time, the step of carrying out vacuum dehumidifying to proof armored platinum resistor thermometer using vacuum moisture removing apparatus for charging includes: that the signal output end of proof armored platinum resistor thermometer is stripped out signal lead, it is placed in vacuum chamber, it vacuumizes, and is warming up to the first temperature of setting；Stopping vacuumizes, it is filled with the high inert gas of thermal coefficient, continue after keeping the temperature a period of time, stop vacuum chamber external furnace body to be powered, it is cooled to second temperature, promotion vacuum chamber or cooperation promote vacuum chamber and product after cooling, vacuum interior products are made to wait for that sealing glue position can be seen clearly, and so that glue injection machine gum outlet is provided easy access to product and wait for sealing glue position, when furnace temperature to third temperature spot, sealing compound is squeezed into glue injection machine, and encapsulating sealing is carried out to the signal output end of thermometer, stopping is filled with helium, first flange and second flange are dismantled, taking-out temperature meter, whether defective watch sealing, such as hole, i.e. timely glue.The response time of proof armored platinum resistor thermometer is improved using method of the invention.
Description
Technical field
It is the present invention relates to field of temperature measurement, in particular to a kind of for improving the proof armored platinum resistor thermometer response time
Method.
Background technique
Referring to Fig. 8 and Fig. 9, proof armored platinum resistor thermometer is to be drawn soldered signal with such as oxide of insulating materials 192
The platinum resistive element 194 of line 193 is platinum resistance temperature-sensing element, is placed in metal jacket pipe 195 and is compacted manufactured flexible heavily fortified point
Real assembly is known as proof armored platinum resistor thermometer.Proof armored platinum resistor thermometer signal output end is needed with sealing compound 20 such as epoxy
The sealing of glue encapsulating, achievees the purpose that insulation.Platinum resistive element can be unit piece, and dual-element or multiple groups element, signal lead can
To be two-wire system, three-wire system or four-wire system.And the thermal response time of proof armored platinum resistor thermometer refers to Spline smoothing occur in temperature
When, resistance change time to needed for being equivalent to some regulation percentage of the Spline smoothing of platinum resistance thermometer, usually
It is indicated with τ (s), the percentage of platinum resistance thermometer thermal response time is usually 0.632 or 0.5, i.e. τ0.632(s) or τ0.5
(s)。
Due to being full of the relatively low air of thermal coefficient in existing proof armored platinum resistor thermometer, so that proof armored platinum resistor
The thermometer response time is slower.
Summary of the invention
The purpose of the present invention is being directed to the corresponding deficiency of the prior art, provide a kind of for improving proof armored platinum resistor thermometer
The method of response time utilizes the interior especially temperature-sensing element of the inert gas replacement thermometer that stability is good, thermal coefficient is high
The relatively low air of the thermal coefficient at place improves the response time to improve the performance of thermometer.
The purpose of the present invention is what is realized using following proposal: one kind is for improving the proof armored platinum resistor thermometer response time
Method, use following proof armored platinum resistor thermometer vacuum moisture removing apparatus for charging to proof armored platinum resistor thermometer carry out vacuum dehumidifying,
To improve the response time of proof armored platinum resistor thermometer, which includes for disposing
Heating device to the vacuum chamber of sealed product and for being heated to vacuum chamber, and for being produced to vacuum is indoor wait seal
The glue injection machine of the signal output end encapsulating sealing of product, the upper end of the vacuum chamber is equipped with the opening for passing in and out for product, described
The upper end opening of vacuum chamber is equipped with the first flange and second flange being connected by bolt, solid between first flange and second flange
Surely there is vacuum rubber mat, for sealing vacuum chamber, the first flange is connect with vacuum chamber upper end, and product is equipped in the vacuum chamber
Fixed bracket, for installing fixed product, the side wall of the vacuum chamber is equipped with the gas for vacuumizing and being filled with gas
Entrance, the gas inlet-outlet are connected with connecting tube, one end of the connecting tube with for vacuumizing and being filled with gas
Gas inlet-outlet connection, the other end of connecting tube by valve with vacuum orifice equipment and source of inflation gas for being connect respectively.
Vacuum orifice equipment is using the vacuum pump bought in the market.The source of inflation gas is gas cylinder, such as helium tank.
Vacuum dehumidifying is carried out to proof armored platinum resistor thermometer using above-mentioned proof armored platinum resistor thermometer vacuum moisture removing apparatus for charging
Step includes:
The step of vacuum dehumidifying is carried out to proof armored platinum resistor thermometer using above-mentioned proof armored platinum resistor thermometer vacuum moisture removing apparatus for charging
Include:
1) signal output end of proof armored platinum resistor thermometer is stripped out into signal lead, be placed in vacuum chamber, vacuumized, and be warming up to
First temperature of setting, and a period of time is kept the temperature for dehumidifying and stopping vacuumizing after improving vacuumizing effect；
2) stop after vacuumizing, be filled with the high inert gas of thermal coefficient to vacuum chamber, heat preservation a period of time is so that the helium being filled with
Gas behind interiors of products space well into starting to cool down；When preparing sealing temperature spot wait be cooled to second temperature, vacuum is promoted
Room or cooperation promote vacuum chamber and product, and vacuum interior products is made to wait for that sealing glue position can be by it is clear that and be easy glue injection machine gum outlet
Sealing glue position is waited for close to product, when temperature is down to third temperature i.e. injecting glue temperature spot, i.e., squeezes into sealing compound to temperature with glue injection machine
The signal output end of meter carries out encapsulating sealing, stops being filled with inert gas immediately, first flange and second flange are dismantled, take out
Whether thermometer, it is defective to watch sealing, such as hole, i.e., timely glue, then presses the sealing of normal cure program Solidification.It is normal solid
Change program finger ring oxygen adhesive curing program.
It vacuumizes and stops vacuumizing after it is more than hour to keep the temperature 1 after the first temperature spot.
First temperature is higher than product and uses temperature, is lower than A grades of limiting temperatures of platinum resistance temperature-sensing element；Second temperature is to prepare
Sealing temperature spot will not lead to unnecessary damage because temperature sharply cools down for product and equipment；Third temperature is sealing temperature
Degree, epoxy glue has certain wellability and mobility at a temperature of this.In injecting glue temperature spot, exposed vacuum glass pipe outer wall can
(100 DEG C or less) are touched with hand, glue has certain wellability and mobility (generally in room temperature or to be higher than when injecting glue temperature spot
Sealing under room temperature, generally not sealing when more than 100 DEG C, temperature is excessively high, and curing rate is too fast, hole easy to form.) platinum resistance
A grades of limiting temperatures of temperature-sensing element are generally 450 DEG C；The use temperature of most platinum resistance thermometer is at 400 DEG C or less.
Promoting product is realized using promotion product fixing rack, and promoting vacuum chamber is that vacuum chamber reality is promoted using lanyard
It is existing.
It vacuumizes in step 1) less than or equal to 10-1Pa, as far as possible exclusion interiors of products air；When being vacuumized in step 1)
Between be greater than or equal to 2 hours, as far as possible exclusion interiors of products air；The high inert gas of thermal coefficient is helium；The sealing
Glue is epoxy glue.The setting of these conditions is provided to exclude interiors of products air as far as possible, experience, can vacuumize again sometimes,
Helium, improvement effect are filled again.
Stop being filled with high-purity helium to vacuum chamber after vacuumizing in step 2；The sealing compound is epoxy glue.
Preferably, the first temperature is 400 DEG C ± 20 DEG C；Second temperature is 300 DEG C；Third temperature is 100 DEG C or less；Step
It is rapid 1) in soaking time be greater than or equal to 60 minutes, in step 2 soaking time be greater than or equal to 30 minutes.
The glue injection machine uses manual glue injection machine；The glue injection machine includes the syringe for accommodating sealing compound, the syringe
Head end be equipped with the injection needle that is connected to syringe, for being protruded into vacuum chamber across vacuum rubber mat, to the letter to sealed product
The sealing of number output end encapsulating is equipped with matched piston core pin, the piston and needle of described piston core pin one end in the syringe
Cylinder is slidably matched and seals, and syringe is stretched out outside the other end of the piston core pin.The overhanging end of the piston core pin is equipped with operation
Handle.This glue injection machine can use injector for medical purpose, the elongated stainless steel tube of syringe needle.The length of injection needle is set according to actual needs
It sets.
The vacuum chamber uses transparent glass tube, and the lower end of transparent glass tube seals, and the upper end of the transparent glass tube is set
There are the first flange and second flange being connected by bolt, vacuum rubber mat is fixed between first flange and second flange, is used for
Sealed transparent glass tube, the first flange are connect with transparent glass tube upper end；The heating device includes oven enclosure, institute
State and be equipped with boiler tube, heating wire and temperature-control heat couple in oven enclosure, the heating wire and temperature-control heat couple respectively with controller
Electrical connection, the heating wire are looped around in the outer circumferential walls of boiler tube, and the lower end of the boiler tube and outer circumferential walls are equipped with heat preservation
The lower end of material, the boiler tube is supported in oven enclosure, the opening that the upper end of boiler tube is equipped with from oven enclosure upper surface
Outer stretching oven enclosure, the transparent glass tube are mounted in boiler tube；The lower end of transparent glass tube is supported on thermal insulation material；
The overhanging boiler tube upper end out in the upper end of transparent glass tube；The lower end of the boiler tube is supported on thermal insulation material；The temperature-control heat couple
It is arranged between the inner wall of boiler tube and the outer wall of transparent glass tube；The controller is also connected with instruction inputting device and display
Device；The temperature signal that the temperature-control heat couple is used to will test passes to controller, and described instruction input unit is used for will
The command signal of operator passes to controller, and the controller is used to receive temperature signal and the operator of temperature-control heat couple
Command signal, control the energization or power-off of heating wire, and control display device displays temperature；Between heating wire and boiler tube absolutely
Edge, the boiler tube are made of ceramic material；The heating wire is spiral shape；Or boiler tube is made of stainless steel tube, heating wire
Outer setting insulating layer forms armouring heater strip.The transparent glass tube is made of quartz glass resistant to high temperature.Thermal insulation material is resistance to
High temperature, good heat insulating can be tieed up using alumina silicate pricker.The purpose that vacuum chamber preferentially selects transparent glass tube is it can be seen that true
Convenient for operating inside empty room, and high temperature resistant.First flange is fixed by the way of being glued with transparent glass tube.
Proof armored platinum resistor thermometer vacuum moisture removing apparatus for charging further includes for hanging glass tube with vacuum and product fixing rack
Hanger, the product fixing rack can be promoted up and down；The product fixing rack includes lift lever, and is located at lift lever bottom end
Product support plate, the lift lever be equipped with product limit plate, the upper end of the lift lever sequentially passes through first flange, vacuum
Vacuum chamber is stretched out outside rubber mat, second flange；The upper end of the lift lever is equipped with hook, for being articulated in hanger；The vacuum
Glass tube is mounted by lanyard and hanger；The hanger is fixed on the heating；The product limit plate is along the circumferential direction equal
Even that several limit holes are distributed with, the lower end of the product is supported in product support plate, product circumferential wall and product limit plate
Limit hole clearance fit, by product limit in the limit hole of product limit plate；The lift lever is equipped at least one piece of product
Limit plate.
The hanger is fixed in oven enclosure.The present invention can also be according to the length of product above product support plate
Cushion block is set on lift lever.The cushion block is made of two halves circle cushion block, and fifty-fifty circle cushion block is equipped with for stepping down for lift lever
Semicolumn groove, two halves circle cushion block, which is combined after the round cushion block of composition one, fixes or uses other modes by iron wire
It is fixed, so that it may to be fixed on lift lever.
The outer wall of the vacuum chamber is equipped with one or two gas inlet-outlet, when gas inlet-outlet is one, the gas
For body entrance for vacuumizing and being filled with gas, the connecting tube connecting with the gas inlet-outlet is true with pumping respectively by tee tube
Equipment of eating dishes without rice or wine and source of inflation gas connection, are equipped with the first valve, source of inflation gas and threeway between vacuum orifice equipment and tee tube
The second valve is equipped between pipe；When gas inlet-outlet is two, first gas entrance passes through the first valve for vacuumizing
Door is connect with vacuum orifice equipment, and second gas entrance is connect for being filled with gas, and by the second valve with source of inflation gas.
Gas inlet-outlet is arranged on transparent glass tube or the outer wall of first flange.
The vacuum rubber mat is circle, and the outer rim of the vacuum rubber mat is equipped with the hole for passing through for bolt；The vacuum
Rubber mat is vacuum rubber pad, high temperature resistant, good airproof performance.
It is still sealing that the vacuum rubber mat of this patent, which is injected after syringe needle punctures through, and hungry area pad is longer using the time surely
Cause to be injected after opening occurs in the place that syringe needle punctures through for a long time, can be used after sealing element blocked up the opening of vacuum rubber mat
It vacuumizes, it is of course also possible to more renew.
Present invention has the advantage that since this method uses above-mentioned proof armored platinum resistor thermometer vacuum moisture removing apparatus for charging pair
Proof armored platinum resistor thermometer carries out vacuum dehumidifying, to improve the response time of proof armored platinum resistor thermometer, and utilizes stability
The thermal coefficient being especially at temperature-sensing element in inert gas such as helium replacement thermometer good, thermal coefficient is high is relatively low
Air improves the response time of proof armored platinum resistor thermometer to improve the performance of proof armored platinum resistor thermometer.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of proof armored platinum resistor thermometer vacuum moisture removing apparatus for charging of the invention；
Fig. 2 is the structural schematic diagram of transparent glass tube of the invention；
Fig. 3 is the structural schematic diagram of the embodiment one of product fixing rack of the invention；
Fig. 4 is the structural schematic diagram of the embodiment two of product fixing rack of the invention；
Fig. 5 is the structural schematic diagram of the embodiment one of product fixing rack of the invention；
Fig. 6 is the structural schematic diagram of product limit plate of the invention；
Fig. 7 is that injecting glue of the invention seals schematic diagram；
Fig. 8 is the structural schematic diagram of unit piece four-wire system proof armored platinum resistor thermometer；
Fig. 9 is the structural schematic diagram of dual-element four-wire system proof armored platinum resistor thermometer.
In attached drawing, 1 is transparent glass tube, and 2 be first flange, and 3 be second flange, and 4 be vacuum rubber mat, and 5 be connecting tube, 6
It is lift lever for product fixing rack, 61,62 be product support plate, and 63 be product limit plate, and 631 be limit hole, and 64 be hook,
65 be cushion block, and 7 be glue injection machine, and 71 be syringe, and 72 be injection needle, and 73 be piston core pin, and 8 be oven enclosure, and 9 be boiler tube,
10 be heating wire, and 11 be thermal insulation material, and 12 be hanger, and 13 be lanyard, and 14 be the first valve, and 15 be the second valve, and 16 be threeway
Pipe, 17 be vacuum orifice equipment, and 18 be helium gas source, and 19 be product, and 191 be sealing section, and 20 be sealing compound.
Specific embodiment
Embodiment one
Referring to Fig. 1 to Fig. 7, a kind of proof armored platinum resistor thermometer vacuum moisture removing apparatus for charging, including for disposing to the true of sealed product
Empty room and heating device for being heated to vacuum chamber, and for giving vacuum the indoor signal output end to sealed product
The glue injection machine 7 of encapsulating sealing, the upper end of the vacuum chamber are equipped with the opening for passing in and out for product, and the upper end of the vacuum chamber is opened
Mouth is equipped with the first flange 2 and second flange 3 being connected by bolt, and vacuum glue is fixed between first flange 2 and second flange 3
Pad 4, for sealing vacuum chamber, the first flange 2 is connect with vacuum chamber upper end, and product fixing rack is equipped in the vacuum chamber
6, for installing fixed product, the side wall of the vacuum chamber is equipped with the gas inlet-outlet for vacuumizing and being filled with gas,
The gas inlet-outlet is connected with connecting tube 5, and one end of the connecting tube 5 goes out with the gas for vacuumizing and being filled with gas
Entrance connection, the other end of connecting tube 5 by valve with vacuum orifice equipment 17 and source of inflation gas for being connect respectively.It takes out true
Equipment of eating dishes without rice or wine 17 is using the vacuum pump bought in the market.The source of inflation gas is gas cylinder, such as helium tank.
The glue injection machine 7 uses manual glue injection machine 7；The glue injection machine 7 includes the syringe 71 for accommodating sealing compound 20, institute
The head end for stating syringe 71 is equipped with the injection needle 72 that be connected to syringe 71, for being protruded into vacuum chamber across vacuum rubber mat 4, give to
The signal output end encapsulating of sealed product seals, and is equipped with matched piston core pin 73, the piston core in the syringe 71
The piston of 73 one end of bar is slidably matched and seals with syringe 71, and syringe 71 is stretched out outside the other end of the piston core pin 73；It is described
Sealing compound 20 is epoxy glue.The overhanging end of the piston core pin 73 is equipped with operation handle.The knot of this glue injection machine 7 and injector for medical purpose
Structure is similar, and only the injection needle 72 of present patent application can be with longer and thick (intensity is more greatly).The length of injection needle 72
It is arranged according to actual needs.
The vacuum chamber uses transparent glass tube 1, and the lower end of transparent glass tube 1 seals, the upper end of the transparent glass tube 1
Equipped with the first flange 2 and second flange 3 being connected by bolt, vacuum rubber mat is fixed between first flange 2 and second flange 3
4, it is used for sealed transparent glass tube 1, the first flange 2 to be connect with 1 upper end of transparent glass tube；The heating device includes heating
Stove outer covering 8, the oven enclosure 8 is interior to be equipped with boiler tube 9, heating wire 10 and temperature-control heat couple, the heating wire 10 and temperature control heat
Galvanic couple is electrically connected with the controller respectively, and the heating wire 10 is looped around in the outer circumferential walls of boiler tube 9, the lower end of the boiler tube 9 with
And outer circumferential walls are equipped with thermal insulation material 11, the lower end of the boiler tube 9 is supported in oven enclosure 8, and the upper end of boiler tube 9 is from adding
Oven enclosure 8 is stretched out outside the opening that 8 upper surface of hot stove shell is equipped with, the transparent glass tube 1 is mounted in boiler tube 9；It is transparent
The lower end of glass tube 1 is supported on thermal insulation material 11；Overhanging 9 upper end of boiler tube out in the upper end of transparent glass tube 1；The boiler tube 9
Lower end is supported on thermal insulation material 11；The temperature-control heat couple be arranged in boiler tube 9 inner wall and transparent glass tube 1 outer wall it
Between；The controller is also connected with instruction inputting device and display device；The temperature-control heat couple is used for the temperature that will test
Degree signal passes to controller, and described instruction input unit is used to the command signal of operator passing to controller, the control
Device processed is used to receive the temperature signal of temperature-control heat couple and the command signal of operator, controls the energization or disconnected of heating wire 10
Electricity, and control display device displays temperature.The boiler tube 9 is made of ceramic material；The heating wire 10 is spiral shape；Boiler tube
9 can also make of stainless steel tube, but the equipped naked silk of heating wire 10 is changed to armouring heater strip (device), makes heating wire 10 and boiler tube 9
Between insulate.The transparent glass tube 1 is made of quartz glass resistant to high temperature.11 high temperature resistant of thermal insulation material, good heat insulating,
It can be tieed up using alumina silicate pricker.First flange 2 is fixed by the way of being glued with transparent glass tube 1.Vacuum chamber preferentially selects thoroughly
The purpose of bright glass tube 1 is it can be seen that internal vacuum chamber is convenient for operation, and high temperature resistant.Certain vacuum chamber also can choose can be full
Its desired other materials of foot is made.
This method for being used to improve the proof armored platinum resistor thermometer response time further includes for hanging glass tube with vacuum and production
The hanger 12 of the fixed bracket 6 of product, the product fixing rack 6 can be promoted up and down；The product fixing rack 6 includes lift lever
61, and the product support plate 62 positioned at 61 bottom end of lift lever, the lift lever 61 is equipped with product limit plate 63, the promotion
The upper end of bar 61, which sequentially passes through, stretches out vacuum chamber outside first flange 2, vacuum rubber mat 4, second flange 3；The lift lever 61 it is upper
End is equipped with hook 64, for being articulated in hanger 12；The glass tube with vacuum is mounted by lanyard 13 and hanger 12；The hanger
12 fix on the heating.The hanger 12 is fixed in oven enclosure 8.
The product limit plate 63 has been distributed uniformly and circumferentially several limit holes 631, the lower end support of the product
In product support plate 62,631 clearance fit of limit hole of product circumferential wall and product limit plate 63 limits product in product
In the limit hole 631 of limit plate 63；The lift lever 61 is equipped at least one piece of product limit plate 63.
The outer wall of the vacuum chamber is equipped with one or two gas inlet-outlet, when gas inlet-outlet is one, the gas
Body entrance for vacuumizing and be filled with gas, the connecting tube 5 connect with the gas inlet-outlet pass through tee tube 16 respectively with
Vacuum orifice equipment 17 and source of inflation gas connection, are equipped with the first valve 14, fill between vacuum orifice equipment 17 and tee tube 16
The second valve 15 is equipped between gas gas source and tee tube 16；When gas inlet-outlet is two, first gas entrance is for taking out
Vacuum, and connect with vacuum orifice equipment 17 by the first valve 14, second gas entrance is used to be filled with gas, and passes through the
Two valves 15 are connect with source of inflation gas.
Gas inlet-outlet is arranged on transparent glass tube 1 or the outer wall of first flange 2.
The source of inflation gas is the high noble gas source of thermal coefficient.
The source of inflation gas is helium gas source 18.
The vacuum rubber mat 4 is circle, and the outer rim of the vacuum rubber mat 4 is equipped with the hole for passing through for bolt.
It is still sealing that the vacuum rubber mat 4 of this patent, which is injected after syringe needle 72 punctures through, and hungry area pad 4 uses the time surely
It is longer to cause after being injected the place appearance opening that syringe needle 72 punctures through for a long time, sealing element opening vacuum rubber mat 4 can be used
Mouth vacuumizes after having blocked up, it is of course also possible to more renew.
Embodiment two
Also cushion block 65 can be arranged according to the length of product in the present invention on the lift lever 61 above product support plate 62.The cushion block
65 are made of two halves circle cushion block 65, and fifty-fifty circle cushion block 65 is equipped with the semicolumn groove for stepping down for lift lever 61, two halves
Round cushion block 65 is fixed by iron wire after being combined composition one round cushion block 65 or is fixed using other modes, so that it may Gu
It is scheduled on lift lever 61.The other technical characteristics of the present embodiment are the same as example 1.
The present apparatus is not limited only to proof armored platinum resistor thermometer, can be also used for the armoured thermal resistance temperature with same problem
Degree meter etc..
A method of for improving the proof armored platinum resistor thermometer response time, using above-mentioned proof armored platinum resistor thermometer
Vacuum moisture removing apparatus for charging carries out vacuum dehumidifying to proof armored platinum resistor thermometer, thus when improving the response of proof armored platinum resistor thermometer
Between, the step of proof armored platinum resistor thermometer progress vacuum dehumidifying, is wrapped using above-mentioned proof armored platinum resistor thermometer vacuum moisture removing apparatus for charging
It includes:
1) signal output end of proof armored platinum resistor thermometer is stripped out into signal lead, be placed in vacuum chamber, vacuumized, and be warming up to
First temperature of setting, and a period of time is kept the temperature for dehumidifying and stopping vacuumizing after improving vacuumizing effect；First temperature is high
Temperature is used in product, is lower than A grades of limiting temperatures of platinum resistance temperature-sensing element；Second temperature is to prepare sealing temperature spot, is product
It will not lead to unnecessary damage because temperature sharply cools down with equipment；Third temperature is sealing temperature, epoxy glue at a temperature of this
There are certain wellability and mobility.In injecting glue temperature spot exposed vacuum glass pipe outer wall can be touched with hand (100 DEG C or with
Under), glue has certain wellability and mobility (generally in room temperature or to be higher than sealing under room temperature, be no more than when injecting glue temperature spot
100 DEG C, temperature is excessively high, and curing rate is too fast, hole easy to form.A grades of limiting temperatures of platinum resistance temperature-sensing element are generally 450
℃；The use temperature of most platinum resistance thermometer is at 400 DEG C or less.
2) stop after vacuumizing, be filled with the high inert gas of thermal coefficient to vacuum chamber, heat preservation a period of time is so as to be filled with
Helium well into starting to cool down behind interiors of products space；When preparing sealing temperature spot wait be cooled to second temperature, promoted
Vacuum chamber or cooperation promote vacuum chamber and product, and vacuum interior products is made to wait for that sealing glue position can be by it is clear that and make 7 gum outlet of glue injection machine
Product 19 is provided easy access to sealing glue position i.e. sealing section 191, is down to third temperature i.e. injecting glue temperature spot i.e. glass tube with vacuum to temperature
When outer wall can be touched with hand when (100 DEG C or less), i.e., with glue injection machine 7 squeeze into sealing compound 20 to the signal output end of thermometer into
The sealing of row encapsulating stops being filled with inert gas immediately, first flange 2 and second flange 3 be dismantled, taking-out temperature meter watches envelope
Whether glue is defective, such as hole, i.e., timely glue, then press the sealing of normal cure program Solidification.Normal cure program finger ring oxygen
Adhesive curing program.
It vacuumizes and stops vacuumizing after it is more than hour to keep the temperature 1 after the first temperature spot.
Promoting product is realized using promotion product fixing rack 6, and promoting vacuum chamber is to promote vacuum chamber using lanyard 13
It realizes.
It vacuumizes in the present embodiment step 1) less than or equal to 10-1Pa, as far as possible exclusion interiors of products air；In step 1)
Pumpdown time is greater than or equal to 2 hours, as far as possible exclusion interiors of products air.The setting of these conditions is provided to as far as possible
Interiors of products air is excluded, experience can vacuumize again sometimes, fill helium, improvement effect again.
The high inert gas of thermal coefficient is helium；The sealing compound 20 is epoxy glue.The setting of these conditions be all for
Interiors of products air is excluded as far as possible, and experience can vacuumize again sometimes, fill helium, improvement effect again.
Stop being filled with high-purity helium to vacuum chamber after vacuumizing in step 2；The sealing compound 20 is epoxy glue.
The first temperature of the present embodiment is 400 DEG C ± 20 DEG C；Second temperature is 300 DEG C；Third temperature is 100 DEG C or less；
Soaking time is greater than or equal to 60 minutes in step 1), and soaking time is greater than or equal to 30 minutes in step 2.
Principle: helium is inert gas, and easily diffusion and infiltration, chemical property is stablized, and thermal coefficient is high.Helium leads at 0 DEG C
(m DEG C) of hot coefficient W/ is 0.144, and air 0.0233 differs more than 6 times.Therefore, good using stability, thermal coefficient is high
The relatively low air of the interior thermal coefficient being especially at temperature-sensing element of inert gas helium displacement thermometer, to improve temperature
The performance of meter improves the response time.
Embodiment: the proof armored platinum resistor vacuum dehumidifying front and back thermal response time of Φ 3 is as shown in the table:
The above description is only a preferred embodiment of the present invention, is not intended to restrict the invention, it is clear that those skilled in the art can
To carry out various modification and variations without departing from the spirit and scope of the present invention to the present invention.If in this way, these of the invention
Within the scope of the claims of the present invention and its equivalent technology, then the present invention is also intended to encompass these changes to modifications and variations
Including modification.
Claims (10)
1. a kind of method for improving the proof armored platinum resistor thermometer response time, which is characterized in that use following armouring platinum
Resistance thermometer vacuum moisture removing apparatus for charging carries out vacuum dehumidifying to proof armored platinum resistor thermometer, to improve proof armored platinum resistor thermometer
Response time, which includes for disposing vacuum chamber and use to sealed product
In the heating device heated to vacuum chamber, and for the indoor signal output end encapsulating sealing to sealed product of vacuum
Glue injection machine, the upper end of the vacuum chamber are equipped with the opening for passing in and out for product, and the upper end opening of the vacuum chamber, which is equipped with, to be passed through
Bolt connected first flange and second flange, are fixed with vacuum rubber mat between first flange and second flange, true for sealing
Empty room, the first flange are connect with vacuum chamber upper end, product fixing rack are equipped in the vacuum chamber, for installing fixed production
Product, the side wall of the vacuum chamber are equipped with the gas inlet-outlet for vacuumizing and being filled with gas, and the gas inlet-outlet connects
It is connected to connecting tube, one end of the connecting tube is connected to the gas inlet-outlet for vacuumizing and being filled with gas, connecting tube
The other end by valve with vacuum orifice equipment and source of inflation gas for being connect respectively；
The step of vacuum dehumidifying is carried out to proof armored platinum resistor thermometer using above-mentioned proof armored platinum resistor thermometer vacuum moisture removing apparatus for charging
Include:
1) signal output end of proof armored platinum resistor thermometer is stripped out into signal lead, be placed in vacuum chamber, to vacuum chamber,
And vacuum chamber is warming up to the first temperature of setting, and keep the temperature a period of time to stop vacuumizing after sufficiently dehumidifying and vacuumizing；
2) stop after vacuumizing, be filled with the high inert gas of thermal coefficient to vacuum chamber, heat preservation a period of time is so that the helium being filled with
Gas behind interiors of products space well into starting to cool down；When temperature is down to second temperature and prepares sealing temperature spot, promoted true
Empty room or cooperation promote vacuum chamber and product, and vacuum interior products is made to wait for that sealing glue position can be by it is clear that and hold glue injection machine gum outlet
Accessible product waits for sealing glue position, when temperature is down to third temperature spot i.e. injecting glue temperature spot, that is, starts to squeeze into sealing with glue injection machine
Glue carries out encapsulating sealing to the signal output end of thermometer, stops being filled with inert gas immediately, by first flange and second flange
It dismantles, taking-out temperature meter, whether defective, such as hole, i.e., timely glue, then seal by normal cure program Solidification if watching sealing
Glue.
2. according to the method described in claim 1, it is characterized by: promoted product be using promoted product fixing rack realize,
Promoting vacuum chamber is to promote vacuum chamber using lanyard to realize.
3. according to the method described in claim 1, it is characterized by: vacuumizing in step 1) less than or equal to 10-1Pa, as far as possible
Exclude interiors of products air；The pumpdown time is greater than or equal to 2 hours, as far as possible exclusion interiors of products air in step 1)；Institute
Stating the high inert gas of thermal coefficient is helium；The sealing compound is epoxy glue.
4. according to the method described in claim 1, it is characterized by: the first temperature, which is higher than product, uses temperature, lower than platinum resistance
A grades of limiting temperatures of temperature-sensing element；Second temperature is to prepare sealing temperature spot, is that product and equipment will not be due to temperature sharply cools down
Lead to unnecessary damage；Third temperature is injecting glue temperature spot, and epoxy glue has certain wellability, and flowing at a temperature of this
Property.
5. method according to claim 1 or 4, it is characterised in that: the first temperature is 400 DEG C ± 20 DEG C；Second temperature is
300℃；Third temperature is 100 DEG C or less；Soaking time is greater than or equal to 60 minutes in step 1), soaking time in step 2
More than or equal to 30 minutes.
6. according to the method described in claim 1, it is characterized by: the glue injection machine uses manual glue injection machine；The glue injection machine
Including the syringe for accommodating sealing compound, the head end of the syringe is equipped with the injection needle being connected to syringe, for across vacuum
Rubber mat protrudes into vacuum chamber, to the signal output end encapsulating sealing to sealed product, is equipped with matched work in the syringe
Core bar is filled in, the piston of described piston core pin one end is slidably matched and seals with syringe, stretches out outside the other end of the piston core pin
Syringe.
7. according to the method described in claim 1, it is characterized by: the vacuum chamber uses transparent glass tube, transparent glass tube
Lower end sealing, the upper end of the transparent glass tube is equipped with the first flange and second flange being connected by bolt, first flange
It is fixed with vacuum rubber mat between second flange, is used for sealed transparent glass tube, the first flange and transparent glass tube upper end
Connection；The heating device includes oven enclosure, and boiler tube, heating wire and temperature-control heat couple are equipped in the oven enclosure,
The heating wire and temperature-control heat couple are electrically connected with the controller respectively, and the heating wire is looped around in the outer circumferential walls of boiler tube, institute
The lower end and outer circumferential walls for stating boiler tube are equipped with thermal insulation material, and the lower end of the boiler tube is supported in oven enclosure, boiler tube
Upper end oven enclosure is stretched out outside the opening that oven enclosure upper surface is equipped with, the transparent glass tube is mounted on boiler tube
It is interior；The lower end of transparent glass tube is supported on thermal insulation material；The overhanging boiler tube upper end out in the upper end of transparent glass tube；The boiler tube
Lower end is supported on thermal insulation material；The boiler tube is made of ceramic material；The heating wire is spiral shape；The temperature control thermoelectricity
Occasionally it is arranged between the inner wall of boiler tube and the outer wall of transparent glass tube；The controller is also connected with instruction inputting device and shows
Showing device；The temperature signal that the temperature-control heat couple is used to will test passes to controller, and described instruction input unit is used for
The command signal of operator is passed into controller, the controller is used to receive temperature signal and the operation of temperature-control heat couple
The command signal of person, controls the energization or power-off of heating wire, and controls display device displays temperature；Between heating wire and boiler tube absolutely
Edge, the boiler tube are made of ceramic material；The heating wire is spiral shape；Or boiler tube is made of stainless steel tube, heating wire
Outer setting insulating layer forms armouring heater strip；The transparent glass tube is made of quartz glass resistant to high temperature.
8. according to the method described in claim 1, it is characterized by: proof armored platinum resistor thermometer vacuum moisture removing apparatus for charging further includes using
It can be promoted up and down in suspension glass tube with vacuum and the hanger of product fixing rack, the product fixing rack；The product is fixed
Bracket includes lift lever, and the product support plate positioned at lift lever bottom end, and the lift lever is equipped with product limit plate, described
The upper end of lift lever, which sequentially passes through, stretches out vacuum chamber outside first flange, vacuum rubber mat, second flange；The upper end of the lift lever is set
There is hook, for being articulated in hanger；The glass tube with vacuum is mounted by lanyard and hanger；The hanger is fixed on heating dress
It sets；The product limit plate has been distributed uniformly and circumferentially several limit holes, and the lower end of the product is supported on product branch
On fagging, product is limited the limit hole in product limit plate by the limit hole clearance fit of product circumferential wall and product limit plate
It is interior；The lift lever is equipped at least one piece of product limit plate.
9. according to the method described in claim 1, it is characterized by: the outer wall of the vacuum chamber is equipped with one or two gas
Entrance, when gas inlet-outlet is one, the gas inlet-outlet is for vacuumizing and being filled with gas, with the gas inlet-outlet
The connecting tube of connection is connect with vacuum orifice equipment and source of inflation gas respectively by tee tube, vacuum orifice equipment and tee tube
Between be equipped with the first valve, between source of inflation gas and tee tube be equipped with the second valve；When gas inlet-outlet is two, the first gas
Body entrance is connect for vacuumizing, and by the first valve with vacuum orifice equipment, and second gas entrance is for being filled with gas
Body, and connect by the second valve with source of inflation gas.
10. according to the method described in claim 1, it is characterized by: the vacuum rubber mat is circle, the vacuum rubber mat it is outer
Edge is equipped with the hole for passing through for bolt；The vacuum rubber mat is vacuum rubber pad, high temperature resistant, good airproof performance.
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| CN110763362A (en) * | 2019-11-14 | 2020-02-07 | 中国计量科学研究院 | Pressure-controlled twisted platinum resistance thermometer |
| CN113029374A (en) * | 2021-04-07 | 2021-06-25 | 大连博控科技股份有限公司 | Manufacturing method of armored platinum resistor temperature sensor with high insulation strength |
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| CN109029755B (en) | 2020-12-25 |
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