CN210108535U - Temperature measuring device and constant-pressure medium container thereof - Google Patents
Temperature measuring device and constant-pressure medium container thereof Download PDFInfo
- Publication number
- CN210108535U CN210108535U CN201921047201.1U CN201921047201U CN210108535U CN 210108535 U CN210108535 U CN 210108535U CN 201921047201 U CN201921047201 U CN 201921047201U CN 210108535 U CN210108535 U CN 210108535U
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- push rod
- temperature
- container
- temperature measuring
- cavity
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- 239000012530 fluid Substances 0.000 claims abstract description 29
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 28
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 28
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 26
- 238000006073 displacement reaction Methods 0.000 claims description 28
- 230000008859 change Effects 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 5
- 238000009529 body temperature measurement Methods 0.000 abstract description 22
- 238000005259 measurement Methods 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910001338 liquidmetal Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000036760 body temperature Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000012982 microporous membrane Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229910000846 In alloy Inorganic materials 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The utility model discloses a temperature measuring device's constant voltage medium container, including the container shell, the container shell is inside to be formed with and to hold the chamber, is provided with inner intercommunication on the container shell to holding chamber, outer end intercommunication to external push rod barrel chamber, is provided with the push rod in the push rod barrel chamber, and the inner of push rod is provided with polytetrafluoroethylene micropore film, and the medial surface and the temperature measurement fluid medium of micropore film contact, are provided with intercommunication polytetrafluoroethylene micropore film lateral surface and external air guide groove on the push rod. When the temperature measuring fluid medium in the cavity is heated to generate volume expansion, redundant air in the cavity is compressed, the pressure is increased to be higher than atmospheric pressure, the air is discharged to the outside through the air guide groove on the rear edge of the polytetrafluoroethylene microporous film, and the temperature measuring fluid medium drives the push rod to do linear motion. Therefore, when the temperature is measured, the air sucked in the container cavity can be exhausted, the pressure of the container cavity is kept stable, and the accuracy of the temperature measurement value is kept. The utility model also discloses a temperature measuring device.
Description
Technical Field
The utility model belongs to the technical field of temperature measurement, concretely relates to temperature measuring device and constant voltage medium container thereof.
Background
At present, body temperature measuring equipment mainly comprises a physical thermometer and a digital thermometer, wherein the physical thermometer mainly comprises a mercury thermometer, an alcohol thermometer and the like, and the digital thermometer mainly comprises an infrared body temperature gun, a thermocouple digital display thermometer and the like.
Among the thermometers, the physical thermometer has been widely accepted due to its low cost and high accuracy, but the physical thermometer has a long measurement time and a great limitation in digital application. Although the digital thermometer has great progress in convenience of use and expansibility of digital application, the measurement accuracy of the digital thermometer is not satisfactory because of being susceptible to environmental factors.
In the related art, there is a temperature measuring device that detects a volume change of a temperature measuring fluid medium by using a mechanical mechanism to obtain a temperature signal, which has an advantage of being not easily affected by environmental factors, but during a test, the volume change of the medium causes a medium container to suck air, thereby generating air pressure, generating a deviation in displacement of a push rod, and affecting a measurement value of the temperature measuring device.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a temperature measuring device and constant voltage medium container thereof.
The purpose of the utility model is realized through the following technical scheme:
on the one hand, the utility model provides a temperature measuring device's constant voltage medium container, including the container shell, the inside appearance chamber that is used for filling temperature measurement fluid medium that is formed with of container shell, be provided with inner intercommunication to holding chamber, outer end intercommunication to external push rod barrel chamber on the container shell, be provided with the push rod that can follow push rod barrel chamber axial displacement in the push rod barrel chamber, sliding seal cooperation between the periphery of the inner of push rod and the wall in push rod barrel chamber, the inner of push rod is provided with polytetrafluoroethylene micropore film, polytetrafluoroethylene micropore film's medial surface with temperature measurement fluid medium contacts, be provided with intercommunication polytetrafluoroethylene micropore film lateral surface and external air guide groove on the push rod.
As a further improvement, the inner end of the push rod is sleeved with a sleeve which is in sliding sealing fit with the wall surface of the cavity of the push rod barrel, the bottom surface of the sleeve is provided with a vent hole, and the polytetrafluoroethylene microporous film is arranged on the inner bottom surface of the sleeve.
As a further improvement, the inner end of the push rod is provided with a bearing bush positioned in the sleeve, the air guide groove is formed in the bearing bush, and the outer diameter of the push rod is smaller than the diameter of the cavity of the push rod barrel.
The utility model provides a temperature measuring device's constant voltage medium container, including the container shell, the inside appearance chamber that is used for filling temperature measurement fluid medium that is formed with of container shell, be provided with inner intercommunication to holding chamber, outer end intercommunication to external push rod barrel chamber on the container shell, be provided with the push rod that can follow push rod barrel chamber axial displacement in the push rod barrel chamber, sliding seal cooperation between the periphery of the inner of push rod and the wall in push rod barrel chamber, the inner of push rod is provided with polytetrafluoroethylene micropore film, polytetrafluoroethylene micropore film's medial surface with temperature measurement fluid medium contacts, be provided with intercommunication polytetrafluoroethylene micropore film lateral surface and external air guide groove on the push rod. The utility model discloses at the during operation, when the temperature measurement fluid medium that holds the intracavity is heated and is produced the volume expansion, will hold the unnecessary air compression of intracavity, pressure increase to atmospheric pressure more than, gaseous air guide groove discharge to the external world on passing through polytetrafluoroethylene micropore film back edge, temperature measurement fluid medium redriven push rod is linear motion. Therefore, when the temperature is measured, the air sucked in the container cavity can be exhausted, the pressure of the container cavity is kept stable, and the accuracy of the temperature measurement value is kept.
On the other hand, the utility model provides a temperature measuring device, include as above constant voltage medium container, it has temperature measurement fluid medium to fill in the appearance chamber, the push rod is connected with the elastic reset mechanism who makes the push rod remove to inner and is used for detecting the displacement volume's of push rod displacement sensor, displacement sensor is connected with the temperature conversion module that is used for turning into the displacement volume temperature change signal, temperature conversion module is connected with the temperature output module who is used for exporting temperature signal.
The utility model provides a temperature measuring device is provided with above-mentioned constant voltage medium container, and it has corresponding beneficial effect, consequently no longer carries out detailed description.
Drawings
The present invention is further explained by using the drawings, but the embodiments in the drawings do not constitute any limitation to the present invention, and for those skilled in the art, other drawings can be obtained according to the following drawings without any inventive work.
Fig. 1 is a schematic sectional structure diagram of the constant pressure medium container of the present invention.
Fig. 2 is a three-dimensional assembly view of the push rod, the bearing bush, the polytetrafluoroethylene microporous film and the sleeve of the present invention.
Fig. 3 is a schematic view of the cross-sectional structure of the assembled push rod, bearing bush, teflon microporous membrane and sleeve of the present invention.
Fig. 4 is a schematic structural diagram of the temperature measuring device of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the following detailed description of the present invention is provided with reference to the accompanying drawings and specific embodiments, and it should be noted that the embodiments and features of the embodiments of the present invention can be combined with each other without conflict.
Combine fig. 1 to fig. 4 shown, the embodiment of the utility model provides a temperature measuring device's constant voltage medium container, including container shell 1, container shell 1 is the metal container shell, and container shell 1 adopts the metal material, and preferred material is alloy steel that heat conduction efficiency is high like the stainless steel, because the heat conductivity of metal material is greater than the glass material far away, can realize the efficient heat-conduction, guarantees the rapid survey. The container comprises a container shell 1 and is characterized in that a containing cavity 2 filled with a temperature measuring fluid medium is formed in the container shell 1, a push rod barrel cavity 3 is arranged on the container shell 1, the inner end of the push rod barrel cavity is communicated with the containing cavity 2, the outer end of the push rod barrel cavity is communicated with the outside, a push rod 4 capable of axially moving along the push rod barrel cavity 3 is arranged in the push rod barrel cavity 3, the periphery of the inner end of the push rod 4 is in sliding sealing fit with the wall surface of the push rod barrel cavity 3, and a polytetrafluoroethylene microporous film 5 is. The inner side surface of the polytetrafluoroethylene microporous film 5 is in contact with the temperature measuring fluid medium, and the push rod 4 is provided with an air guide groove 6 for communicating the outer side surface of the polytetrafluoroethylene microporous film 5 with the outside. The microporous polytetrafluoroethylene film (PTFE film) is prepared with polytetrafluoroethylene as material and through rolling, extruding, biaxial stretching and other steps. The PTFE membrane has a fibril-like microporous structure, the porosity is more than 85%, 14 hundred million micropores are formed in each square centimeter, and the pore diameter ranges from 0.02 mu m to 15 mu m. The polytetrafluoroethylene microporous membrane is air permeable but does not allow passage of the temperature measuring fluid medium.
When the temperature measuring fluid medium in the cavity is heated to expand in volume, redundant air in the cavity is compressed, the pressure is increased to be higher than atmospheric pressure, the air is discharged to the outside along the air guide groove in the bearing bush after passing through the vent hole and the polytetrafluoroethylene microporous film, the temperature measuring fluid medium extrudes the sleeve, and the sleeve is pressurized to drive the push rod to do linear motion. Therefore, when the temperature is measured, the air sucked in the container cavity can be exhausted, the pressure of the container cavity is kept stable, and the accuracy of the temperature measurement value is kept.
As a further preferred embodiment, the inner end of the push rod 4 is sleeved with a sleeve 7 which is in sliding sealing fit with the wall surface of the push rod cylinder cavity 3, the bottom surface of the sleeve 7 is provided with a vent hole 8, the polytetrafluoroethylene microporous film 5 is arranged on the inner bottom surface of the sleeve 7, and the polytetrafluoroethylene microporous film is in contact with a temperature measurement fluid medium through the vent hole. In order to facilitate the arrangement of the air guide groove, a bearing bush 9 positioned in a sleeve 7 is arranged at the inner end of the push rod 4, the air guide groove 6 is arranged on the bearing bush 9, the position of the air guide groove corresponds to that of the vent hole, and the outer diameter of the push rod 4 is smaller than the diameter of the push rod barrel cavity 3. When the temperature measuring fluid medium in the cavity is heated to expand in volume, redundant air in the cavity is compressed, the pressure is increased to be higher than atmospheric pressure, the air is discharged to the outside along the air guide groove in the bearing bush after passing through the vent hole and the polytetrafluoroethylene microporous film, the temperature measuring fluid medium extrudes the sleeve, and the sleeve is pressurized to drive the push rod to do linear motion. Therefore, when the temperature is measured, the air sucked in the container cavity can be exhausted, the pressure of the container cavity is kept stable, and the accuracy of the temperature measurement value is kept.
As shown in fig. 4, an embodiment of the present invention further provides a temperature measuring device, which includes the constant pressure medium container. The main body of the container shell 1 is a flat hexahedron, preferably a flat cuboid structure, so that the contact area with a measured object is increased as much as possible under the same volume, and the heat conduction efficiency is improved. The container shell is internally provided with a heat conduction grid, the heat conduction grid divides the containing cavity into a plurality of sub-containing cavities which are communicated with each other, the grid is formed in the container shell, the heat conduction rate can be further increased, meanwhile, the heat conduction grid structure can enhance the rigidity of the container, and the structural safety is further improved. The cavity 2 is filled with a temperature measurement fluid medium, the temperature measurement fluid medium is liquid metal or liquid metal alloy, such as mercury or gallium-indium alloy, and the thermal volume expansion coefficient of the liquid metal is extremely stable in a common temperature range, so that the measurement accuracy can be ensured. An elastic return mechanism 10 for moving the push rod 4 inward and a displacement sensor 11 for detecting the displacement of the push rod 4 are connected to the push rod 4. The displacement sensor 11 is connected with a temperature conversion module 12 for converting displacement into a temperature change signal, the temperature conversion module 12 is connected with a temperature output module 13 for outputting a temperature signal, the displacement sensor 11, the temperature conversion module 12 and the temperature output module 13 are connected with a power supply 14, and the power supply 14 supplies power to the displacement sensor, the temperature conversion module and the temperature output module. Wherein, the temperature output module can be a display such as a dot matrix LED screen or a liquid crystal screen to display the temperature; the temperature output module can also be a voice prompt such as a loudspeaker to carry out voice broadcast temperature, and the temperature output module can also send the temperature signal to third party equipment in a wireless transmission mode. +
The temperature measuring device of this embodiment is at the during operation, because the change of temperature can make temperature measurement fluid medium produce expend with heat and contract with cold effect, when the volume expansion of temperature measurement fluid medium, the push rod is released through push rod barrel chamber to temperature measurement fluid medium, when the volume shrink of temperature measurement fluid medium, elasticity canceling release mechanical system makes the push rod retract, the change of temperature can make the push rod produce corresponding displacement change like this, the displacement volume of rethread displacement sensor accurate detection push rod, the temperature conversion module turns into the temperature change signal with the displacement volume, rethread temperature output module output temperature signal. The utility model provides a temperature measuring device adopts mechanical type mechanism to detect the volume change of temperature measurement fluid medium to acquire temperature signal, be difficult for receiving the environmental factor influence, the stable performance, the reliability is high, and the security is high.
The displacement sensor is a capacitive grating sensor or a magnetic grating sensor. The measurement precision of the capacitive grating sensor, the grating sensor and the magnetic grating sensor can reach 0.01mm-0.001mm, a relative capacitive grating sensor can be used for measuring tiny position change, and an absolute capacitive grating sensor can also be used for measuring an absolute position. When the displacement sensor is an incremental relative capacitive grating sensor or a magnetic grating sensor, the displacement sensor cannot measure the change of the liquid level height after power failure, and at the moment, if temperature measurement is to be carried out again, the corresponding relation between the liquid level height and a certain initial temperature needs to be reset, preferably, the initial temperature is the maximum measuring range corresponding temperature, and the reset corresponding position is the maximum liquid level height. For this purpose, the displacement sensor is provided with a reset calibration key which can be triggered when the push rod is positioned at the innermost end or the outermost end of the push rod barrel cavity. Because the displacement sensor is provided with a reset calibration key, when the mechanical structure touches the reset calibration key, a reset calibration signal can be generated, and the initial temperature reset is carried out by a built-in control program to realize reset. The present embodiment is configured such that the reset calibration key can be activated to transmit a reset calibration signal when the push rod is located at the outermost end of the push rod barrel cavity.
The capacitive gate sensor is an absolute capacitive gate sensor; or, the grating sensor is an absolute grating sensor; or, the magnetic grid sensor is an absolute magnetic grid sensor. The displacement sensor adopts an absolute type capacitive grating sensor or an absolute type magnetic grating sensor, can directly measure the displacement height value, does not need a reset calibration structure, does not need continuous electrification of the sensor, and is electrified only when measurement is needed, so that the electric quantity of a battery can be greatly saved, and the service life is prolonged.
In the description above, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore should not be construed as limiting the scope of the invention.
In conclusion, although the present invention has been described with reference to the preferred embodiments, it should be noted that, although various changes and modifications can be made by those skilled in the art, unless such changes and modifications depart from the scope of the present invention, they should be construed as being included therein.
Claims (4)
1. The constant-pressure medium container of the temperature measuring device is characterized in that: the container comprises a container shell (1), an accommodating cavity (2) for filling temperature-measuring fluid media is formed inside the container shell (1), the container shell (1) is provided with a push rod cylinder cavity (3) with the inner end communicated to the accommodating cavity (2) and the outer end communicated to the outside, a push rod (4) capable of axially moving along the push rod cylinder cavity (3) is arranged in the push rod cylinder cavity (3), the periphery of the inner end of the push rod (4) is in sliding seal fit with the wall surface of the push rod cylinder cavity (3), a polytetrafluoroethylene microporous film (5) is arranged at the inner end of the push rod (4), the inner side surface of the polytetrafluoroethylene microporous film (5) is in contact with the temperature-measuring fluid media, and an air guide groove (6) communicated with the outer side surface of the polytetrafluoroethylene microporous film (5) and the outside is formed in the push rod (4).
2. The constant-pressure medium container of a temperature measuring device according to claim 1, wherein: the inner pot head of push rod (4) be equipped with sliding seal complex sleeve (7) between the wall of push rod barrel chamber (3), the bottom surface of sleeve (7) is provided with air vent (8), polytetrafluoroethylene micropore film (5) set up on the interior bottom surface of sleeve (7).
3. The constant pressure medium container of the temperature measuring device as claimed in claim 2, wherein: the inner end of the push rod (4) is provided with a bearing bush (9) positioned in the sleeve (7), the air guide groove (6) is formed in the bearing bush (9), and the outer diameter of the push rod (4) is smaller than the diameter of the push rod cylinder cavity (3).
4. A temperature measuring device, comprising the constant pressure medium container as claimed in any one of claims 1 to 3, wherein the cavity (2) is filled with a temperature measuring fluid medium, the push rod (4) is connected with an elastic reset mechanism for moving the push rod (4) towards the inner end and a displacement sensor for detecting the displacement of the push rod (4), the displacement sensor is connected with a temperature conversion module for converting the displacement into a temperature change signal, and the temperature conversion module is connected with a temperature output module for outputting a temperature signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921047201.1U CN210108535U (en) | 2019-07-06 | 2019-07-06 | Temperature measuring device and constant-pressure medium container thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921047201.1U CN210108535U (en) | 2019-07-06 | 2019-07-06 | Temperature measuring device and constant-pressure medium container thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210108535U true CN210108535U (en) | 2020-02-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921047201.1U Withdrawn - After Issue CN210108535U (en) | 2019-07-06 | 2019-07-06 | Temperature measuring device and constant-pressure medium container thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210108535U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110440941A (en) * | 2019-07-06 | 2019-11-12 | 长沙米粒智能科技有限责任公司 | A kind of temperature measuring equipment and its constant pressure media Containers |
-
2019
- 2019-07-06 CN CN201921047201.1U patent/CN210108535U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110440941A (en) * | 2019-07-06 | 2019-11-12 | 长沙米粒智能科技有限责任公司 | A kind of temperature measuring equipment and its constant pressure media Containers |
| CN110440941B (en) * | 2019-07-06 | 2024-02-02 | 长沙米粒智能科技有限责任公司 | Temperature measuring device and constant-pressure medium container thereof |
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| GR01 | Patent grant | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200221 Effective date of abandoning: 20240202 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200221 Effective date of abandoning: 20240202 |