CN107131997A - A kind of high-temp pressure sensor - Google Patents
A kind of high-temp pressure sensor Download PDFInfo
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- CN107131997A CN107131997A CN201710487167.9A CN201710487167A CN107131997A CN 107131997 A CN107131997 A CN 107131997A CN 201710487167 A CN201710487167 A CN 201710487167A CN 107131997 A CN107131997 A CN 107131997A
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/04—Means for compensating for effects of changes of temperature, i.e. other than electric compensation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/08—Means for indicating or recording, e.g. for remote indication
- G01L19/083—Means for indicating or recording, e.g. for remote indication electrical
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The present invention relates to pressure measurement technology field, more particularly to a kind of high-temp pressure sensor.The high-temp pressure sensor that the present invention is provided, including metal base, pressure transfer device and display and control device；Metal base has a penetrating via, and one end of penetrating via is covered with metallic membrane, and the other end of penetrating via is connected by capillary with pressure transfer device；Low-melting alloy is filled between metallic membrane and penetrating via, in penetrating via and in capillary；Capillary is provided with heater, and heater and pressure transfer device are connected with display and control device respectively.The present invention is using filling working medium of the low-melting alloy as high-temp pressure sensor, and used cooperatively with the heater on capillary, effectively solve the present situation that common oil-filled pressure transducer can not work in high temperature environments, teletransmission differential pressure transporting structure is used in structure, the measurement of pressure under hot environment can be solved the problems, such as very well；Simple in construction, pressure measurement accuracy is high.
Description
Technical field
The present invention relates to pressure measurement technology field, more particularly to a kind of high-temp pressure sensor, and in particular to Yi Zhongjie
Structure is simple and both flowable at low temperature, at high temperature the unlikely high-temp pressure sensor for causing corrosion again.
Background technology
Sensor is in production and living, and similar to the sense organ of people, it gathers external information, then through focusing on, to realize
Various required controls.Pressure sensor is one of the most frequently used sensor of industrial production, is widely used in and various automatically controls neck
Domain, such as chemical industry, Machine Manufacture, automated intelligent control, traffic, military project, space flight, navigation, a variety of industries of electric power, in industrial production
In occupy an important position.
It is special the need for common pressure sensor can not meet production and living with the continuous progressive and development of science and technology
It is not some Special complex environment, such as high temperature, burn into soda acid, vibration.Common pressure sensor largely uses silicone oil
(one kind of conduction oil) is not only acted as the filled media of pressure sensor in the cavity that silicone oil is filled in pressure sensor
Buffering and conducting pressure signal, moreover it is possible to pressure-resistant, the resistance to ability of shaking of pressure sensor can be increased；Also have gallium basal cell temperature liquid gold
Belong to for substituting silicone oil as the application of pressure sensor transmission medium.However, by common silicone oil self property is limited, working as temperature
Degree reaches that more than 300 DEG C will seethe with excitement, or even occurs qualitative change；And though gallium base room temperature liquid metal has wider warm area, it is lived
Property it is strong, have stronger corrosivity to most metals material at high temperature.Therefore, first two medium limits high temperature pressure biography
The development of sensor.
Low-melting alloy is as a kind of emerging functional material, with fusing point is low, boiling point is high, thermal conductivity good, with wider
Warm area, stability is good, volatility is low, viscosity is low, steam is forced down, the characteristic such as good fluidity after being melted down, is as high-temperature high-pressure
The ideal working substance of force snesor filling.But, although room temperature liquid metal such as gallium-base alloy fusing point in part is very low, pressure sensor
It can start work in room temperature, but it is that, in such as 500 DEG C or so of high temperature, gallium or its alloy can occur rotten with stainless steel that its is unfavorable
Erosion, so as to cause sensor damage failure.In contrast to this, bismuth of other low-melting alloys such as fusing point at 50-60 DEG C or so
Based alloy, corrosion reaction does not occur in high temperature with stainless steel, but it is to be in solid-state during room temperature using bottleneck, it is impossible to open
Dynamic operation.
The content of the invention
(1) technical problem to be solved
The purpose of the present invention is：There is provided a kind of simple in construction and both flowable at low temperature, it is again unlikely at high temperature to cause
The high-temp pressure sensor of corrosion, pyrometry environment is unable to, from gallium basal cell temperature liquid to solve filled media from conduction oil
Metal easily corrode and from room temperature be in solid-state low-melting alloy can not startup optimization the problem of.
(2) technical scheme
In order to solve the above-mentioned technical problem, the invention provides a kind of high-temp pressure sensor, including metal base, pressure
Transfer device and display and control device；The metal base has a penetrating via, one end of the penetrating via covered with
Metallic membrane, the other end of the penetrating via is connected by capillary with the pressure transfer device；The metallic membrane is consolidated
It is scheduled on the metal base, and between the metallic membrane and the penetrating via, in the penetrating via and the capillary
Low-melting alloy is filled with pipe；The capillary is provided with heater, the heater and pressure transfer device point
It is not connected with the display and control device.
Wherein, be additionally provided with temperature measuring equipment on the capillary, the temperature measuring equipment respectively with the heater and display
And control device connection.
Wherein, the heater is wrapped on the tube wall of the capillary, and is coated with the heater heat-insulated
Insulation material.
Wherein, the centre of the pressure transfer device is provided with diaphragm, and the both sides of the diaphragm are the eutectic respectively
Point alloy and high temperature heat conductive oil, side where the low-melting alloy are connected with the capillary, side where the high temperature heat conductive oil
It is connected with the display and control device.
Wherein, the low-melting alloy by including：Two kinds in bismuth, indium, tin, zinc, gold, silver, lead, cadmium, mercury, copper, aluminium or
Two or more metals are prepared from.
Wherein, the melting range of the low-melting alloy is 38 DEG C~110 DEG C；The low-melting alloy is in molten condition
Kinematic viscosity be 4 × 10-8~10-7m2/s；The boiling point of the low-melting alloy is more than 900 DEG C；The heat of the low-melting alloy
Conductance is more than 12.5W/ (mk).
Wherein, the display and control device include display module, pressure-sensitive core body and control module；The pressure-sensitive core body with
The pressure transfer device connection, the pressure value for gathering the pressure transfer device transmission；The control module is used to control
Make the working condition of the heater.
Wherein, the display module is LCD MODULE, the pressure value for showing the pressure transfer device transmission
And the temperature value that the temperature measuring equipment is measured.
Wherein, the metallic membrane includes：Stainless steel diaphragm or nichrome diaphragm or platinum-tungsten alloys diaphragm or palladium chromium are closed
Golden film piece.
Wherein, the metallic membrane is consolidated by way of welding or bonding or clamping or threaded connection with the metal base
Fixed connection.
(3) beneficial effect
The above-mentioned technical proposal of the present invention has the following advantages that：
The invention provides a kind of high-temp pressure sensor, including metal base, pressure transfer device and display and control
Device；Metal base has a penetrating via, and one end of penetrating via is covered with metallic membrane, and the other end of penetrating via passes through
Capillary is connected with pressure transfer device；Metallic membrane is fixed on metal base, and between metallic membrane and penetrating via, pass through
Low-melting alloy is filled with break-through road and in capillary；Capillary is provided with heater, heater and pressure transmission
Device is connected with display and control device respectively.When the high-temp pressure sensor is in running order, heating dress need to be first passed through
Put and low-melting alloy is heated, and be at flowable state；Metallic membrane is directly in contact with measured medium, metal
Deformation quantity is passed to pressure by the low-melting alloy that diaphragm is produced in fusing in deformation, capillary by the extruding of measured medium
Force transfering device, pressure transfer device transmission pressure signal, pressure signal is gathered by the pressure-sensitive core body of display and control device,
And the pressure value of measured medium is shown by display and control device.The present invention is passed using low-melting alloy as high temperature pressure
The filling working medium of sensor, and used cooperatively with the heater on capillary, effectively solve common oil-filled pressure transducer
The present situation that can not be worked in high temperature environments, teletransmission differential pressure transporting structure is used in structure, hot environment can be solved very well
The measurement problem of lower pressure；And the high-temp pressure sensor that the application is provided, simple in construction, reasonable in design, easy to operate, pressure
Measurement accuracy is high, has preferable application prospect in industries such as Aero-Space, military project, metallurgy and chemical industry, practical, beneficial to progress
Standardized production and popularization.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the high-temp pressure sensor of high-temp pressure sensor embodiment of the invention.
In figure：1：Metallic membrane；2：Filled media；3：Metal base；4：Capillary；5：Temperature measuring equipment；6：Heater；
7：Pressure transfer device；8：Display and control device.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained on the premise of creative work is not made, belongs to the scope of protection of the invention.
Particularly, the nouns of locality such as the upper and lower, front, rear, left and right occurred in the present embodiment using the direction as shown in Fig. 1 as
It is accurate.
As shown in figure 1, the embodiments of the invention provide a kind of high-temp pressure sensor, including metal base 3, pressure transmission
Device 7 and display and control device 8；Metal base 3 has a penetrating via, in the present embodiment, and metal base 3 is rectangle
Structural member, penetrating via is located at the middle part of the metal base 3 and through its left and right sides；One end of penetrating via is covered with metal
Diaphragm 1, the other end of penetrating via is connected by capillary 4 with pressure transfer device 7, and metallic membrane 1 is constituted with penetrating via
Miniature cavities for placing filled media 2；Metallic membrane 1 is fixed on metal base 3, and metallic membrane 1 and penetrating via
Between, in penetrating via and in capillary 4 be filled with low-melting alloy, in the present embodiment, filled media 2 selects low melting point
Alloy；Capillary 4 is provided with heater 6, and heater 6 is used for the low-melting alloy for heating filling in capillary 4, and makes it
In molten condition, heater 6 and pressure transfer device 7 are connected with display and control device 8 respectively, display and control device
The pressure value of 8 measured medium for receiving the transmission of pressure transfer device 7, and the working condition of controllable refrigerating/heating apparatus 6, are such as opened
Open or close.The present invention using low-melting alloy as high-temp pressure sensor filling working medium, and with capillary 4
Heater 6 is used cooperatively, and the present situation that common oil-filled pressure transducer can not work in high temperature environments is effectively solved, in structure
Upper use teletransmission differential pressure transporting structure, the measurement of pressure under hot environment can be solved the problems, such as very well, wherein, what hot environment referred to
It is 300~2000 DEG C；And the high-temp pressure sensor that the application is provided, simple in construction, reasonable in design, easy to operate, pressure is surveyed
Accuracy of measurement is high, has preferable application prospect in industries such as Aero-Space, military project, metallurgy and chemical industry, practical, is beneficial into rower
Quasi- metaplasia production and popularization.
Specifically, the operation principle for the high-temp pressure sensor that the application is provided is：Heater 6 need to be first passed through to eutectic
Point alloy is heated, and is at flowable state；Metallic membrane 1 is directly in contact with measured medium, metallic membrane 1 by
Deformation is produced to the extruding of measured medium, deformation quantity is passed to pressure and passed by the low-melting alloy in fusing in capillary 4
Delivery device 7, pressure transfer device 7 gives pressure signal transmission in the pressure-sensitive core of display and control device 8, display and control device 8
Body gathers pressure signal, and shows the pressure value of measured medium by display and control device 8.
Further, it is additionally provided with temperature measuring equipment 5 on capillary 4, temperature measuring equipment 5 is respectively with heater 6 and display and controlling
Device 8 processed is connected, wherein, temperature measuring equipment 5 is connected with heater 6 and display and control device 8 respectively by wire.At this
In embodiment, by being provided with temperature measuring equipment 5 on capillary 4, to detect the temperature value of capillary 4 in real time and by the temperature measured
Value is transmitted to display and control device 8, using being heated by heater 6 to capillary 4 initial stage, when being heated to capillary
The low-melting alloy of filling was in after molten condition certain time in pipe 4, and heater 6 is closed by display and control device 8,
Heating dress is opened when being down to preset value at a temperature of temperature measuring equipment 5 detects capillary 4, then by display and control device 8
6 pairs of capillaries 4 are put to heat, and then to save heating energy source.
Particularly, temperature measuring equipment 5 can be temperature sensor or temperature probe, can specifically be implemented according to actual
Condition is reasonably selected.
Further, heater 6 is wrapped on the tube wall of capillary 4, and heat-insulation and heat-preservation material is coated with heater 6
Material.In the present embodiment, heater 6 is preferably to be wound with glass fiber reinforcement refractory fibre outside multiply resistance wire twisted wire
Layer, arbitrarily can bend on demand and can with by capillary 4 tube wall close contact heating monomer, pass through on heater 6 bag
Heat-insulating heat-preserving material is covered, to improve the efficiency of heating surface, while playing a part of protecting heater 6.Wherein, heat-insulating heat-preserving material can
Think rock wool or mineral wool or expanded perlite or other novel foamed plastic class heat preserving and insulating materials (such as polystyrene foam,
Extrusion molding polystyrene polyfoam, polyurethane, poly terephthalic acid class plastics etc.), it can specifically be carried out according to actual performance
Rational selection.
Specifically, in the present embodiment, the centre of pressure transfer device 7 is provided with diaphragm, by heat shield by high-temperature high-pressure
Force snesor is divided into high-temperature region and low-temperature space, and the high-temperature region Transfer Medium different from low-temperature space is separated；The two of diaphragm
Side is low-melting alloy and high temperature heat conductive oil respectively, wherein, side where low-melting alloy is side where high-temperature region, low-melting alloy
It is connected with capillary 4；Side where side is low-temperature space, high temperature heat conductive oil where high temperature heat conductive oil is connected with display and control device 8,
Wherein high temperature heat conductive oil can select methyl-silicone oil or common silicone oil.Diaphragm is used for carry the low-melting alloy of high-temperature region
Deformation quantity passes to display and the control device 8 of low-temperature space, and pressure signal is changed to electric signal, eventually through display and control
Device 8 processed shows the pressure value of measured medium.
Preferably, in the present embodiment, low-melting alloy by including：Bismuth, indium, tin, zinc, gold, silver, lead, cadmium, mercury, copper, aluminium
In two or more metal be prepared from.By being provided with heater 6 on capillary 4, filled media 2 can be by selecting
Prepared with the combination of above-mentioned different metal, range of choice can carry out rational according to actual implementation condition extensively, specifically
Selection.
Preferably, to reach preferable pressure test precision, in the present embodiment, the performance parameter of low-melting alloy is preferred
For：The melting range of low-melting alloy is 38 DEG C~110 DEG C；The kinematic viscosity that low-melting alloy is in molten condition is 4 × 10-8
~10-7m2/s；The boiling point of low-melting alloy is more than 900 DEG C；The thermal conductivity of low-melting alloy is more than 12.5W/ (mk).
Specifically, display and control device 8 include display module, pressure-sensitive core body and control module；Pressure-sensitive core body and pressure
Transfer device 7 is connected, the pressure value for gathering the transmission of pressure transfer device 7；Control module is used for the work for controlling heater 6
Make state；Preferably, display module is LCD MODULE, pressure value and thermometric for showing the transmission of pressure transfer device 7
The temperature value that device 5 is measured.Display and control device 8 are used for the temperature for gathering the feedback of temperature measuring equipment 5, and to heater 6
Working condition makes corresponding control；Display and control device 8 gather the pressure value information of measured medium by pressure-sensitive core body,
And the pressure of current measured medium is shown by LCD MODULE.In addition, LCD MODULE is also used for display currently
The temperature of capillary 4.
It should be noted that, heater 6 and display and control device 8 both can with built-in power, can also external power supply, its
In, according to external power supply, heater 6 and display and control device 8 can select 12V or 5V customary DC electricity.
Preferably, metallic membrane 1 includes：Stainless steel diaphragm or nichrome diaphragm or platinum-tungsten alloys diaphragm or palladium evanohm
Diaphragm, in the present embodiment, metallic membrane 1 are used to directly contact with measured medium, can specifically be selected according to different measured mediums
Stainless steel or nichrome or platinum-tungsten alloys or platinum-tungsten alloys etc. are selected as diaphragm material.
Preferably, metallic membrane 1 is fixed with metal base 3 by way of welding or bonding or clamping or threaded connection and connected
Connect.In the present embodiment, the connected mode of metallic membrane 1 and metal base 3, which is selected, welds, technique simplicity and good fixing effect,
Metallic membrane 1 after welding and one miniature inner chamber of formation between the penetrating via of metal base 3, miniature interior intracavitary is filled with low
Melting alloy, so as to the pressure of more accurate reaction measured medium.
In summary, the invention provides a kind of high-temp pressure sensor, it include metal base, pressure transfer device and
Display and control device；Metal base have a penetrating via, one end of penetrating via covered with metallic membrane, penetrating via
The other end is connected by capillary with pressure transfer device；Metallic membrane is fixed on metal base, and metallic membrane is with running through
Low-melting alloy is filled between passage, in penetrating via and in capillary；Capillary is provided with heater, heater
And pressure transfer device is connected with display and control device respectively.When the high-temp pressure sensor is in running order, elder generation is needed
Low-melting alloy is heated by heater, and is at flowable state；Metallic membrane is directly and measured medium
It is in contact, metallic membrane is produced deformation by the extruding of measured medium, the low-melting alloy in fusing in capillary is by shape
Variable transferring is to pressure transfer device, and pressure signal transmission to display and control device 8, is shown and controlled by pressure transfer device
The pressure-sensitive core body collection pressure signal of device 8, and the pressure value of measured medium is shown by display and control device.The present invention
Make using filling working medium of the low-melting alloy as high-temp pressure sensor, and with the heater cooperation on capillary
With, effectively solve the present situation that common oil-filled pressure transducer can not work in high temperature environments, in structure use teletransmission differential pressure
Pick-up structure, the measurement of pressure under hot environment can be solved the problems, such as very well；And the high-temp pressure sensor that the application is provided, knot
Structure is simple, reasonable in design, easy to operate, and pressure measurement accuracy is high, the industries such as Aero-Space, military project, metallurgy and chemical industry have compared with
Good application prospect, it is practical, produce and promote beneficial to being standardized.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (10)
1. a kind of high-temp pressure sensor, it is characterised in that：Including metal base, pressure transfer device and display and control dress
Put；The metal base have a penetrating via, one end of the penetrating via covered with metallic membrane, the penetrating via
The other end is connected by capillary with the pressure transfer device；The metallic membrane is fixed on the metal base, and institute
State between metallic membrane and the penetrating via, low-melting alloy is filled with the penetrating via and in the capillary；
The capillary is provided with heater, and the heater and pressure transfer device connect with the display and control device respectively
Connect.
2. high-temp pressure sensor according to claim 1, it is characterised in that：Thermometric dress is additionally provided with the capillary
Put, the temperature measuring equipment is connected with the heater and display and control device respectively.
3. high-temp pressure sensor according to claim 1, it is characterised in that：The heater is wrapped in the capillary
On the tube wall of pipe, and heat-insulating heat-preserving material is coated with the heater.
4. high-temp pressure sensor according to claim 1, it is characterised in that：The centre of the pressure transfer device is provided with
Diaphragm, the both sides of the diaphragm are the low-melting alloy and high temperature heat conductive oil, side where the low-melting alloy respectively
It is connected with the capillary, side where the high temperature heat conductive oil is connected with the display and control device.
5. high-temp pressure sensor according to claim 1, it is characterised in that：The low-melting alloy by including：Bismuth,
Two or more metal in indium, tin, zinc, gold, silver, lead, cadmium, mercury, copper, aluminium is prepared from.
6. high-temp pressure sensor according to claim 5, it is characterised in that：The melting range of the low-melting alloy is
38 DEG C~110 DEG C；The kinematic viscosity that the low-melting alloy is in molten condition is 4 × 10-8~10-7m2/s；The low melting point
The boiling point of alloy is more than 900 DEG C；The thermal conductivity of the low-melting alloy is more than 12.5W/ (mk).
7. high-temp pressure sensor according to claim 2, it is characterised in that：The display and control device include display
Module, pressure-sensitive core body and control module；The pressure-sensitive core body is connected with the pressure transfer device, is passed for gathering the pressure
The pressure value of delivery device transmission；The control module is used for the working condition for controlling the heater.
8. high-temp pressure sensor according to claim 7, it is characterised in that：The display module is liquid crystal display mode
Block, for showing the temperature value that the pressure value and the temperature measuring equipment of the pressure transfer device transmission are measured.
9. the high-temp pressure sensor according to claim any one of 1-8, it is characterised in that：The metallic membrane includes：
Stainless steel diaphragm or nichrome diaphragm or platinum-tungsten alloys diaphragm or palladium evanohm diaphragm.
10. the high-temp pressure sensor according to claim any one of 1-8, it is characterised in that：The metallic membrane passes through
Welding or bonding or the mode of clamping or threaded connection are fixedly connected with the metal base.
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| CN201710487167.9A CN107131997A (en) | 2017-06-23 | 2017-06-23 | A kind of high-temp pressure sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710487167.9A CN107131997A (en) | 2017-06-23 | 2017-06-23 | A kind of high-temp pressure sensor |
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| CN201710487167.9A Pending CN107131997A (en) | 2017-06-23 | 2017-06-23 | A kind of high-temp pressure sensor |
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| CN109668680A (en) * | 2019-03-01 | 2019-04-23 | 安徽天康(集团)股份有限公司 | A kind of high-temperature anticorrosion shock resistance dust explosion protection diaphragm type display instrument and pressure gauge on the spot |
| CN114046891A (en) * | 2021-09-18 | 2022-02-15 | 湖南骅骝新材料有限公司 | High-temperature sensor capable of continuously and rapidly measuring temperature of molten steel |
| CN115582450A (en) * | 2022-10-12 | 2023-01-10 | 盐城工学院 | Flexible edge pressing structure for plate forming and regulation and control method |
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