CN219346769U - Metal rod heating device for metal linear expansion coefficient tester - Google Patents
Metal rod heating device for metal linear expansion coefficient tester Download PDFInfo
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- CN219346769U CN219346769U CN202223327453.4U CN202223327453U CN219346769U CN 219346769 U CN219346769 U CN 219346769U CN 202223327453 U CN202223327453 U CN 202223327453U CN 219346769 U CN219346769 U CN 219346769U
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Abstract
The utility model discloses a metal rod heating device for a metal linear expansion coefficient tester, which comprises: a heating module and a water circulation module. The heating module comprises a metal tube and a heating unit, wherein the bottom of the metal tube is closed, the top of the metal tube is open, the heating unit spirally surrounds and clings to the inner wall of the metal tube along the height direction of the metal tube, a plurality of threaded holes are uniformly formed in the periphery of the metal tube, the heating module further comprises a positioning assembly, the positioning assembly comprises a circumferential positioning unit, a lower end positioning unit and an upper end positioning unit, the lower end positioning unit is fixedly connected with the bottom end of the metal tube, and the upper end positioning unit is slidably connected with the inner wall of the upper end of the metal tube. The water circulation module comprises a water pumping unit, a water pumping guide pipe and a water injection guide pipe, wherein the water injection guide pipe is communicated with the lower end cavity of the metal pipe, and the water pumping guide pipe is communicated with the upper end cavity of the metal pipe. The device utilizes the hydrologic cycle to make the metal pole that awaits measuring be heated more even, has improved the measurement accuracy of linear expansion coefficient in the university physics experiments.
Description
Technical Field
The utility model relates to the technical field of metal rod water circulation heating, in particular to a metal rod heating device for a metal linear expansion coefficient tester.
Background
The thermal expansion phenomenon of the common substances can occur after the materials are heated, the thermal expansion phenomenon of the gas is most obvious, the liquid is inferior, and the thermal expansion change of the solid is the smallest. Among solids, the thermal expansion of metals is evident, and is usually quantified by the coefficient of linear expansion of the metal. The coefficient of linear expansion refers to: the relative elongation of a unit length of metal in one dimension per 1K increase in temperature. The coefficient of linear expansion is one of the most important parameters of the metal material, is an important reference index for selecting the metal material, and has important significance in the aspects of precision machining, instrument manufacturing and the like. So the physical experiment for measuring the metal linear expansion coefficient is widely carried out in the university physical experiment courses of various universities.
Up to now, the measurement method of the elongation Δl of the metal rod has been as many as ten or more, for example, optical lever method, dial gauge method, michelson interferometer measurement method, single slit diffraction measurement method, and the like are most known. However, among these measurement methods, there is a general problem of uneven heating of the metal rod to be measured, and there is little study on this problem. Therefore, it is necessary to invent a metal rod heating device for heating the metal rod more uniformly so as to improve the measurement accuracy of the linear expansion coefficient in the university physical experiment.
Disclosure of Invention
The utility model aims to overcome the technical defects, and provides a metal rod heating device for a metal linear expansion coefficient tester, which solves the technical problem of uneven heating of a metal rod in the technical field of metal rod heating in the prior art.
In order to achieve the above technical object, the present utility model provides a metal rod heating device for a metal linear expansion coefficient tester, comprising:
the heating module comprises a metal pipe and a heating unit; the bottom of the metal tube is closed, and the top of the metal tube is open; the heating unit is spirally wound along the height direction of the metal tube and is tightly attached to the inner wall of the metal tube; a plurality of threaded holes are uniformly formed in the periphery of the metal tube along the height direction; the heating module further comprises a positioning assembly; the positioning assembly comprises a circumferential positioning unit, a lower end positioning unit and an upper end positioning unit; the circumferential positioning unit is in spiral connection with the threaded hole; the lower end positioning unit is fixedly connected with the middle area of the bottom end of the inner cavity of the metal tube; the upper end positioning unit is in sliding connection with the inner wall of the upper end of the metal tube;
the water circulation module comprises a water pumping unit, a plurality of water pumping pipes and a plurality of water injection pipes; the water injection pipes are communicated with the lower end cavity of the metal pipe; and the plurality of pumping pipes are communicated with the upper end cavity of the metal pipe.
Compared with the prior art, the utility model has the beneficial effects that:
1. the metal rod heating device for the metal linear expansion coefficient tester utilizes the water circulation module to realize dynamic circulation of water in the metal pipe, solves the problem that the metal rod to be tested is heated unevenly in the previous measuring methods such as an optical lever method, a dial indicator method, a Michelson interferometer measuring method, a single slit diffraction measuring method and the like, and greatly improves the measuring precision of the linear expansion coefficient in the college physics experiments.
2. The metal rod heating device for the metal linear expansion coefficient tester utilizes the temperature regulation and control module to monitor the temperature of water in the metal pipe in real time, and utilizes the temperature measuring probe to control the water temperature in the metal pipe in real time so as to enhance the uniformity of the water temperature, when the temperature difference between the upper cavity and the lower cavity of the metal pipe is increased, the temperature regulation and control unit controls the water pumping unit, the water circulation is accelerated so that the water temperature is more uniform, and when the temperature difference is reduced to a certain value, the temperature regulation and control unit controls the water pumping unit, slows down the water circulation, saves electric energy and enhances the stability of the device.
Drawings
FIG. 1 is a schematic diagram of the front structure of a metal rod heating device for a metal linear expansion coefficient tester according to the present utility model;
fig. 2 is a schematic cross-sectional structure of a metal rod heating device for a metal linear expansion coefficient tester according to the present utility model.
Fig. 3 is a schematic diagram of the front structure of a heating module in the metal rod heating device for the metal linear expansion coefficient tester.
Fig. 4 is a schematic cross-sectional view of a heating module in a metal rod heating device for a metal linear expansion coefficient tester according to the present utility model.
Fig. 5 is a schematic perspective view of an upper end positioning unit in a metal rod heating device for a metal linear expansion coefficient tester.
Fig. 6 is a schematic diagram of a temperature control module of a metal rod heating device for a metal linear expansion coefficient tester according to the present utility model.
Fig. 7 is a schematic diagram of a water circulation module of a metal rod heating device for a metal linear expansion coefficient tester.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, 2, 3, 4, 5, 6 and 7, in this embodiment, a metal rod heating device for a metal linear expansion coefficient tester is provided, which includes: a heating module 1, a water circulation module 2, a temperature regulation module 3 and a power supply module 4.
The heating module comprises a metal tube 11 and a heating unit 12; the bottom of the metal tube 11 is closed, the top of the metal tube is open, and a plurality of threaded holes 11a are uniformly formed in the periphery of the metal tube 11 along the height direction. In this embodiment, preferably, four threaded holes 11a are formed in the same direction on the same side of the metal tube 11, and according to the length and positioning requirements of the metal rod 5 to be tested, the threaded holes 11a may be formed in a plurality of directions along the same side of the metal tube 11, but generally not less than four threaded holes 11a are formed, because when the number of the threaded holes 11a on the same side of the metal tube 11 is less than four, the positioning of the metal rod 5 to be tested in the circumferential direction is easy to incline, resulting in inaccurate test data. In this embodiment, preferably, the heating unit 12 is a heating resistance wire, and the heating resistance wire has the advantages of "high use temperature, up to 1400 degrees, long service life, high surface load, good oxidation resistance, high resistivity" and the like.
The heating module 1 further comprises a positioning assembly 13 and a heat insulation layer 134, the positioning assembly 13 comprises a circumferential positioning unit 131, a lower end positioning unit 132 and an upper end positioning unit 133, the circumferential positioning unit 131 is in spiral connection with the threaded hole 11a, the lower end positioning unit 132 is fixedly connected with the middle area of the bottom end of the inner cavity of the metal tube 11, and the upper end positioning unit 133 is in sliding connection with the inner wall of the upper end of the metal tube 11. Specifically, in this embodiment, the circumferential positioning unit 131 is a spiral positioning element, the spiral positioning element is in spiral engagement with the threaded hole 11a, and the circumferential positioning of the metal rod 5 to be measured can be achieved by moving the circumferential positioning unit 131 back and forth, so that the metal rod 5 to be measured is in an upright state under the action of the circumferential positioning unit 131. The materials of the lower end positioning unit 132 and the upper end positioning unit 133 are quartz, and the quartz material with small linear expansion coefficient is selected for ensuring the measurement accuracy because the linear expansion coefficient of the quartz material is very tiny and the expansion caused by the temperature rise is negligible. The lower end positioning unit 132 is fixedly connected with the middle area of the bottom end of the inner cavity of the metal tube 11, and abuts the bottom end of the metal rod 5 to be tested against the upper surface of the lower quartz stone. The upper end positioning unit 133 includes an upper end positioning body 1331 and a pulley 1333, a first extending body 1332 extending outwards is arranged around the upper end positioning body 1331, the first extending body 1332 is a cuboid, one end, away from the upper end positioning body 1331, of the first extending body 1332 is rotationally connected with the pulley 1333, and the first extending bodies 1332 are all arranged in four directions. In order to ensure that the upper end positioning unit 133 does not interfere with the heating unit 12, the upper end positioning unit 133 moves up and down between the leads of the heating unit 12, the helical lead of the heating unit 12 is greater than the distance that the upper end positioning unit 133 moves along the inner wall of the metal tube 11, and the distance between the first extending body 1332 and the pulley 1333 in opposite directions is the same as the inner diameter of the heat insulation layer 134 so that the pulley 1333 is in close contact with the inner wall of the heat insulation layer 134.
Specifically, the circumferential positioning of the metal rod 5 to be measured is achieved by using the forward and backward movement of the circumferential positioning unit 131, the upper positioning unit 133 is slidable, the upper positioning unit 133 abuts against the upper end of the metal rod 5 to be measured, the upper positioning unit 133 can slide up and down according to different lengths of the metal rod 5 to be measured until the upper positioning unit slides to a proper position and abuts against the upper end of the metal rod 5 to be measured, the lower positioning unit 132 is fixed at the bottom of the metal tube 11 and abuts against the lower end of the metal rod 5 to be measured, and in order to ensure that the metal rod 5 to be measured is heated uniformly and the heat loss of the water temperature in the metal tube 11 is reduced as much as possible, the outer ring surface of the heat insulation layer 134 is tightly attached to the cavity surface of the metal tube 11, the heat insulation layer 134 is in a barrel shape, and the cavity surface of the heat insulation layer 134 is tightly attached to the heating unit 12 to ensure heat insulation.
The water circulation module 2 comprises a water pumping unit 21, a plurality of water pumping pipes and a plurality of water injection pipes. One end of each water injection conduit 22 is communicated with the lower end cavity of the metal pipe 11, and the other end of each water injection conduit 22 is communicated with the water pumping unit 21; one end of each pumping conduit 23 is communicated with the cavity at the upper end of the metal pipe 11, and the other end of each pumping conduit 23 is communicated with the pumping unit 21. In this embodiment, two water injection pipes 22 and two water pumping pipes 23 are provided, and a plurality of water pumping pipes 23 and a plurality of water injection pipes 22 are uniformly arranged along the height direction of the metal pipe 11. The temperature regulation and control module 3 includes temperature regulation and control unit 31 and a plurality of temperature probe 32, and a plurality of temperature probe 32 pass through the wire with temperature regulation and control unit 31 is connected, a plurality of temperature probe 32 along the direction of height of metal pipe 11 evenly distributed in the metal pipe 11 cavity, circumferential location unit 131 with threaded hole 11 a's swing joint department, water injection pipe and water pumping pipe 23 with the junction of metal pipe 11 the temperature probe 32 with the junction of metal pipe 11 all is provided with the sealing layer membrane in order to prevent leaking.
Specifically, in this embodiment, four temperature measurement probes 32 are preferably disposed uniformly along the height direction of the metal tube 11, the temperature measurement probes 32 are used for detecting the temperatures of different water levels in the metal tube 11, the temperature control unit 31 reads the data of the temperature measurement probes 32, when the temperature difference between the upper cavity and the lower cavity of the metal tube 11 is increased, the temperature control unit 31 controls the water pumping unit 21 to accelerate the water circulation so that the water temperature is more uniform, and when the temperature difference is reduced to a certain value, the temperature control unit 31 controls the water pumping unit 21 to slow down the water circulation, save electric energy and enhance the stability of the device.
The power supply module 4 supplies power to the heating module 1, the water circulation module 2 and the temperature regulation module 3 through wires.
Working principle: a metal rod heating device for a metal linear expansion coefficient tester comprises a heating module 1, a water circulation module 2, a temperature regulation and control module 3 and a power supply module 4. The heating module 1 comprises a metal pipe 11 and a heating unit 12, wherein the bottom of the metal pipe 11 is closed, the top of the metal pipe 11 is open, the heating unit 12 is spirally wound along the height direction of the metal pipe 11 and is tightly attached to the inner wall of the metal pipe 11 so as to heat tap water in the metal pipe 12, and the heating module 1 further comprises a positioning component 13; the positioning assembly 13 includes a circumferential positioning unit 131, a lower end positioning unit 132, and an upper end positioning unit 133, where the circumferential positioning unit 131 is in screw connection with the threaded hole 11a, and places the metal rod 5 to be tested in the center of the cavity of the metal tube 11, and rotates the circumferential positioning unit 131, and the metal rod 5 to be tested is propped against in each direction, so as to realize circumferential positioning of the metal rod 5 to be tested, the lower end positioning unit 132 is fixedly connected with a middle area of the bottom end of the inner cavity of the metal tube 11, so that the lower end of the metal rod 5 to be tested is propped against the lower end positioning unit 132, and the upper end positioning unit 133 is slidably connected with the inner wall of the upper end of the metal tube 11, so that the metal rod 5 to be tested is propped against the upper end positioning unit 133.
The temperature control module 3 and the water circulation module 2 are utilized to monitor and control the tap water temperature in the metal pipe 11 in real time: when the temperature difference between the upper cavity and the lower cavity of the metal pipe 11 is increased, the temperature regulating unit 31 controls the water pumping unit 21 to accelerate water circulation so that the water temperature is more uniform, and when the temperature difference is reduced to a certain value, the temperature regulating unit 31 controls the water pumping unit 21 to slow down water circulation, save electric energy and enhance the stability of the device.
The whole metal rod 5 to be measured is heated uniformly, the temperature is raised uniformly, the metal rod is heated and expanded, the metal rod slides upwards against the upper end positioning unit 133, the sliding distance of the upper end positioning unit 133 is equal to the heated elongation of the metal rod 5 to be measured, then the sliding distance of the upper end positioning unit 133 is measured by using methods such as a dial indicator, an optical lever and the like, the heated elongation of the metal rod 5 to be measured can be obtained, and the linear expansion coefficient of the metal rod to be measured can be calculated.
The above-described embodiments of the present utility model do not limit the scope of the present utility model. Any of various other corresponding changes and modifications made according to the technical idea of the present utility model should be included in the scope of the claims of the present utility model.
Claims (8)
1. A metal rod heating device for a metal wire expansion coefficient tester, comprising:
the heating module comprises a metal pipe and a heating unit; the bottom of the metal tube is closed, and the top of the metal tube is open; the heating unit is spirally wound along the height direction of the metal tube and is tightly attached to the inner wall of the metal tube; a plurality of threaded holes are uniformly formed in the periphery of the metal tube along the height direction; the heating module further comprises a positioning assembly; the positioning assembly comprises a circumferential positioning unit, a lower end positioning unit and an upper end positioning unit; the circumferential positioning unit is in spiral connection with the threaded hole; the lower end positioning unit is fixedly connected with the middle area of the bottom end of the inner cavity of the metal tube; the upper end positioning unit is in sliding connection with the inner wall of the upper end of the metal tube;
the water circulation module comprises a water pumping unit, a plurality of water pumping pipes and a plurality of water injection pipes; the water injection pipes are communicated with the lower end cavity of the metal pipe; and the plurality of pumping pipes are communicated with the upper end cavity of the metal pipe.
2. The metal rod heating device for the metal linear expansion coefficient tester according to claim 1, further comprising a temperature regulation module, wherein the temperature regulation module comprises a temperature regulation unit and a plurality of temperature measurement probes; the temperature measuring probes are connected with the temperature regulating and controlling unit through wires; the temperature measuring probes are uniformly distributed in the metal tube cavity along the height direction of the metal tube.
3. The metal rod heating device for a metal linear expansion coefficient tester according to claim 2, further comprising a power supply module; the power supply module supplies power to the heating module, the water circulation module and the temperature regulation and control module through wires.
4. The metal rod heating device for a metal linear expansion coefficient tester according to claim 1, wherein the heating module further comprises a heat insulating layer; the heat insulation layer is in a barrel shape; the outer ring surface of the heat insulation layer is tightly attached to the cavity surface of the metal tube; the cavity surface of the heat insulation layer is tightly attached to the heating unit.
5. The metal rod heating apparatus for a metal wire expansion coefficient tester according to claim 4, wherein the upper end positioning unit comprises an upper end positioning body and a pulley; the periphery of the upper end positioning body is provided with a first extending body which extends outwards; the first extension body is cuboid; one end of the first extension body, which is far away from the upper end positioning body, is rotationally connected with the pulley; the first extension body is arranged in four directions.
6. The metal rod heating apparatus for a metal wire expansion coefficient tester according to claim 5, wherein the first extension body and the pulley are formed at the same distance in two opposite directions as the diameter of the inner cavity of the heat insulating layer so that the pulley is closely attached to the inner cavity wall of the heat insulating layer.
7. The metal rod heating apparatus for a metal wire expansion coefficient tester according to claim 1, wherein the upper end positioning unit moves up and down between leads of the heating unit; the spiral lead of the heating unit is larger than the distance that the upper end positioning unit moves along the inner cavity wall of the metal tube.
8. The metal rod heating device for a metal linear expansion coefficient tester according to claim 2, wherein sealing layer films are arranged at the movable connection part of the circumferential positioning unit and the threaded hole, the connection part of the water injection conduit and the water pumping conduit as well as the connection part of the temperature measuring probe and the metal pipe so as to prevent water leakage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223327453.4U CN219346769U (en) | 2022-12-06 | 2022-12-06 | Metal rod heating device for metal linear expansion coefficient tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223327453.4U CN219346769U (en) | 2022-12-06 | 2022-12-06 | Metal rod heating device for metal linear expansion coefficient tester |
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| Publication Number | Publication Date |
|---|---|
| CN219346769U true CN219346769U (en) | 2023-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223327453.4U Active CN219346769U (en) | 2022-12-06 | 2022-12-06 | Metal rod heating device for metal linear expansion coefficient tester |
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| CN (1) | CN219346769U (en) |
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- 2022-12-06 CN CN202223327453.4U patent/CN219346769U/en active Active
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