CN115343329A - Diameter-variable heat conduction instrument - Google Patents
Diameter-variable heat conduction instrument Download PDFInfo
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- CN115343329A CN115343329A CN202210982512.7A CN202210982512A CN115343329A CN 115343329 A CN115343329 A CN 115343329A CN 202210982512 A CN202210982512 A CN 202210982512A CN 115343329 A CN115343329 A CN 115343329A
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- 238000010438 heat treatment Methods 0.000 claims abstract description 108
- 239000011819 refractory material Substances 0.000 claims abstract description 7
- 230000002093 peripheral effect Effects 0.000 claims abstract 2
- 238000009434 installation Methods 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 239000012774 insulation material Substances 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000009970 fire resistant effect Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/18—Investigating or analyzing materials by the use of thermal means by investigating thermal conductivity
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- General Physics & Mathematics (AREA)
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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention discloses a variable-diameter heat conduction instrument which comprises a rack with two mounting plates and a heating device, wherein the heating device is provided with a screw rod, a nut, a fixed sliding rail and a fin; the two ends of the screw rod penetrate through the two mounting plates, each fixed slide rail is parallel to the screw rod, the two ends of the screw rod are fixed on the two mounting plates, each fixed slide rail is provided with a limiting piece group, each limiting piece group is provided with a sliding piece and a fixing piece, the sliding piece is limited on the fixed slide rail and is in sliding connection with the fixed slide rail, and the fixing piece is fixed on the fixed slide rail; each fin is parallel to the screw rod, and the inner side surface of each fin is provided with a mounting frame; first support connecting rods are uniformly distributed on the outer peripheral surface of the nut around the circumference, one end of each first support connecting rod is fixed with the nut, the other end of each first support connecting rod is fixed with the sliding part, the sliding part is connected with the mounting frame through a second support connecting rod, and the mounting frame is connected with the fixing part through a third support connecting rod; the two sides and the middle part of the outer side surface of part of the fin are respectively provided with a galvanic couple and a heating wire and coated with refractory materials. The heat conduction instrument can measure samples with different diameters.
Description
Technical Field
The invention relates to a diameter-variable heat conduction instrument.
Background
The thermal conductivity (thermal conductivity), the maximum service temperature (hot-face characteristics), and the like are physical quantities reflecting the thermal conductivity and workability of the thermal insulation material, and are important thermal properties of the thermal insulation material, not only the basis for evaluating the thermal properties of the material, but also the design basis of the material during application. In addition, the materials of the same composition are prefabricated into plates and pipes, and the internal geometrical structure is inconsistent. Therefore, a flat test piece represents a tubular heat insulating material to test the heat conductivity coefficient or the maximum use temperature, and certain errors exist.
The determination of the thermal conductivity of the thermal insulation material is clearly required in the recommended Standard "determination of the steady-state Heat transfer Properties of thermal insulation layer circular tube method" (GB/T10296-2008); the method of evaluating the maximum use temperature of a thermal insulating material is specified in the recommended national standard "method of evaluating the maximum use temperature of a thermal insulating material" (GB/T17430-2015). However, the following problems are common in the laboratory test instruments used at present: (1) The test is carried out aiming at the material with a specific specification, and the applicability is single; (2) A protection device is not arranged outside the heater tube of the heat conduction instrument, and the influence of ambient air convection is serious, so that the measurement result of a high-temperature section is inaccurate and the repeatability is low.
The traditional heat conduction instrument is improved in the following difficulties: (1) The pipe diameter of the heating pipe is fixed when leaving a factory and cannot be adjusted at a later stage, a mechanism is required to be found to realize the pipe diameter change, and installation positions of a heating wire, a couple and the like are required to be reserved; (2) A protective pipe section is required to be added, so that the temperature field of the heating pipe is ensured to be uniformly distributed; therefore, it is urgently needed to solve the problem.
Disclosure of Invention
In order to solve the problems that the pipe diameter of the heat conduction instrument is fixed, the applicability is single, and the temperature field is not uniformly distributed due to the fact that a protection device is not arranged outside a heater pipe, the invention provides the heat conduction instrument with the variable diameter.
The diameter-variable heat conduction instrument comprises a rack and a heating device arranged on the rack; the rack comprises two mounting plates, and mounting surfaces on the two mounting plates are opposite and parallel; the heating device comprises a screw rod, a plurality of nuts in threaded connection with the screw rod, a plurality of fixed slide rails and a plurality of fins, the length of the fins is smaller than that of the fixed slide rails, and the number of the fixed slide rails is the same as that of the fins.
The screw rod comprises a screw thread section and two polished rod sections connected to two ends of the screw thread section, the two polished rod sections respectively penetrate through the two mounting plates and can rotate relative to the mounting plates, and the screw thread section is located between the two mounting plates.
The fixed slide rails are parallel to the screw rod and are uniformly distributed around the screw rod, two ends of each fixed slide rail are respectively installed on the installation surfaces of the two installation plates, the vertical distances between the fixed slide rails and the screw rod are equal, each fixed slide rail is provided with a limiting piece group, the number of the limiting piece groups on each fixed slide rail is equal to that of nuts, each limiting piece group comprises a sliding piece and a fixing piece, the sliding piece is limited on the fixed slide rail and is in sliding connection with the fixed slide rail, the fixing pieces are fixed on the fixed slide rails, and the sliding piece and the fixing piece on each fixed slide rail are alternately distributed.
Each fin is on a parallel with the lead screw and is located the fixed slide rail outside, and the one side relative with fixed slide rail on the fin is as the medial surface, keeps away from the one side of fixed slide rail as the lateral surface, is equipped with the mounting bracket in the medial surface, and the quantity of mounting bracket is the same with nut quantity on every fin, and the mounting bracket has the articulated shaft.
The periphery of each nut is evenly distributed with a plurality of first supporting connecting rods around the circumference, and the number of the first supporting connecting rods on each nut is the same as that of the fixed sliding rails.
The method comprises the following steps that a nut, a limiting piece group and an installation frame which are adjacent to an installation surface are connected from the installation surface on one side as a first group, and the like is provided with a second group-an nth group, in each group, one end of each first supporting connecting rod is fixed with the nut, the other end of each first supporting connecting rod is fixed with a sliding piece in the limiting piece group, the first supporting connecting rods are perpendicular to a lead screw and a fixed sliding rail, the sliding pieces are connected with hinged shafts of a fin installation frame through second supporting connecting rods, the two ends of each second supporting connecting rod are hinged, the hinged shafts of the installation frame are connected with fixing pieces in the limiting piece group through third supporting connecting rods, one ends of the third supporting connecting rods are hinged on the hinged shafts, the other ends of the third supporting connecting rods are fixed on the fixing pieces, and the projection of the hinged shafts of the installation frame on the fixed sliding pieces is located between the connecting points of the second supporting connecting rods on the sliding pieces and the connecting points of the third supporting connecting rods on the fixing pieces.
Couple mounting grooves parallel to the mounting surface of the mounting plate are respectively formed in two side parts of the outer side surfaces of a plurality of fins, the couple mounting grooves on two sides divide the fins into a heating metering section in the middle and heating protection sections on two sides, a couple mounting groove is further formed in the outer side surface of each fin where the heating metering section is located, a couple is mounted in each couple mounting groove, and a refractory material is coated on each couple mounting groove to cover the couple; heating wire mounting grooves are respectively formed in the outer side faces of the heating metering section and the heating protection section on the fins, heating wires are mounted in the heating wire mounting grooves, the heating wires are coated with refractory materials to cover the heating wires, and leads are led out of the couple and the heating wires.
In order to improve the stability of the frame, the frame comprises a bottom plate, and two mounting plates are vertically fixed on the bottom plate.
In order to rotate the screw rod conveniently, the two screw rod sections are arranged on the two mounting plates through bearings.
In order to rotate the screw rod conveniently, a rotary hand wheel is arranged at the end of the polished rod section at one side, which extends out of the mounting plate.
In order to facilitate the sliding of the sliding part on the fixed sliding rail smoothly, the cross section of the fixed sliding rail is circular, the sliding part is a lantern ring, and the fixing part is a fixed block.
In order to enable the rack mounting surface to play a role of a plug and reduce convection heat dissipation at two ends of the fin, the distance between the two ends of the fin and the two mounting surfaces is 10mm respectively.
In order to enable the heating of the heat conduction instrument to be more uniform and the temperature measurement to be more accurate, 16 fins are provided, wherein the topmost fin is set to be No. 1, counting is carried out from one side from No. 1 around the circumference, couples and heating wires are distributed on the No. 1, no. 3, no. 7, no. 11 and No. 15 fins, from the end part of the heating and metering section on the same side of the fin, the end part of the heating and metering section of the couple distance fin on the No. 1 fin is 80cm, the end part of the heating and metering section of the couple distance fin on the No. 3 fin is 140cm, the end part of the heating and metering section of the couple distance fin on the No. 7 fin is 20cm, the end part of the heating and metering section of the couple distance fin on the No. 11 fin is 50cm, and the end part of the heating and metering section of the couple distance fin on the No. 15 fin is 110cm.
In order to make the heating of the heat conduction instrument more even, the heating wire mounting groove is long-strip-shaped and is arranged along the length direction of the fin, the two ends of the heating wire mounting groove on the heating metering section are close to the two ends of the heating metering section, and the two ends of the heating wire mounting groove on the heating protective section are close to the two ends of the heating protective section.
Has the beneficial effects that: the heat conduction instrument disclosed by the invention has the advantages that the plurality of independent fins are used for enclosing into a tubular shape, the tubular fins can be expanded and folded along the radial direction to realize measurement of samples with different diameters, and compared with the conventional heating pipe which can not change the diameter and is suitable for a single-diameter sample, the heat conduction instrument disclosed by the invention can be suitable for samples with various diameter specifications; through set up heating protection section at fin both ends, can reduce the heat dissipation and make temperature field distribution even to avoid causing the interference to the measurement.
Drawings
FIG. 1 is a schematic view of a thermal conductivity meter according to the present invention;
FIG. 2 isbase:Sub>A schematic view of the structure of FIG. 1 taken along line A-A;
FIG. 3 is a schematic view of the structure of FIG. 2 taken along line B-B;
in the figure, 1, a heating device; 11. a screw rod; 12. a nut; 13. fixing the slide rail; 14. a slider; 15. a fixing member; 16. a fin; 17. a mounting frame; 18. a first support link; 19. a second support link; 20. a third support link; 2. mounting a plate; 3. rotating a hand wheel; 4. and a bearing.
Detailed Description
The technical solution of the present invention is described in detail by the following examples, but the scope of the present invention is not limited to the examples.
Examples
As shown in fig. 1 to 3, a variable diameter thermal conductivity meter includes a frame and a heating device 1 mounted on the frame. The frame includes a bottom plate and two mounting panels 2, and two mounting panels 2 vertical fixation are on the bottom plate, and two mounting panels 2 are relative and parallel face is the installation face. The heating device 1 comprises a screw rod 11, 6 nuts 12 and 16 fixed slide rails 13 which are in threaded connection with the screw rod 11, and 16 fins 16 of which the length is smaller than that of the fixed slide rails 13.
The lead screw 11 includes screw thread section and connects two polished rod sections at screw thread section both ends, and two polished rod sections pass two mounting panels 2 respectively to install on two mounting panels 2 through bearing 4, can rotate for mounting panel 2, install rotatory hand wheel 3 at the end that stretches out mounting panel 2 of one side polished rod section, the screw thread section is located between two mounting panels 2.
Each fixed slide rail 13 is parallel to the screw rod 11 and evenly distributed around the screw rod 11, two ends of each fixed slide rail 13 are respectively fixed on the installation surfaces of the two installation plates 2, the vertical distances between each fixed slide rail 13 and the screw rod 11 are equal, the cross section of each fixed slide rail 13 is circular, 6 limiting piece sets are arranged on each fixed slide rail 13, each limiting piece set comprises a sliding piece 14 and a fixing piece 15, the sliding piece 14 is a sleeve ring and is sleeved on the fixed slide rail 13 and is in sliding connection with the fixed slide rail 13, the fixing piece 15 is a fixing block and is fixed on the fixed slide rail 13, and the sliding piece 14 and the fixing piece 15 on each fixed slide rail 13 are alternately distributed.
Each fin 16 is on a parallel with lead screw 11 and is located the fixed slide rail 13 outside, and the one side relative with fixed slide rail 13 on the fin 16 is as the medial surface, keeps away from the one side of fixed slide rail 13 as the lateral surface, is equipped with mounting bracket 17 at the medial surface, and the last mounting bracket 17 of every fin 16 is 6, and mounting bracket 17 has the articulated shaft, and the fin 16 both ends are 10mm apart from the distance of two installation faces respectively.
16 first support connecting rods 18 are uniformly distributed on the outer circumferential surface of each nut 12 around the circumference, the nut 12 adjacent to the mounting surface, a limiting group and a mounting frame 17 are connected as a first group from the mounting surface on one side, and the like, the nut 12, the limiting group and the mounting frame 17 are arranged in a second group-a sixth group, in each group, a sliding piece 14 in the limiting group is close to the mounting surface, a fixing piece 15 is far away from the mounting surface, one end of each first support connecting rod 18 is fixed with the nut 12, the other end of each first support connecting rod is fixed with a sliding piece 14 in the limiting group, the first support connecting rod 18 is perpendicular to the screw rod 11 and the fixed sliding rail 13, the hinge shafts of the sliding piece 14 and the fin mounting frame 17 are connected through a second support connecting rod 19, two ends of the second support connecting rod 19 are hinged, the hinge shafts of the mounting frame 17 are connected with the fixing pieces 15 in the limiting group through third support connecting rods 20, one end of the third support connecting rod 20 is hinged on the hinge shafts, the other ends of the hinge shafts are fixed on the fixing pieces 15, and the projection of the hinge shafts of the mounting frame 17 on the fixing rails 13 is arranged between the second support connecting rods 14 and the connection points of the third support connecting rods 20 on the fixing pieces 15.
Couple installation grooves parallel to an installation surface of the installation plate are respectively formed in two side portions of the outer side surfaces of 5 fins 16 in the fins, the couple installation grooves in the two sides divide the fins 16 into a heating metering section located in the middle and heating protection sections located on the two sides, the length of the heating metering section is 160cm, the length of the heating protection section is 20cm, a couple installation groove is further formed in the outer side surface of the fin 16 where the heating metering section is located, couples are installed in the couple installation grooves, refractory materials are coated on the couple installation grooves to cover the couples, the couples are K-type couples, and the couples in the couple installation grooves in the two sides are used for monitoring the temperature difference of the heating metering section and the heating protection section. Four mounting brackets 17 are arranged on the inner side surface of the fin 16 where the heating metering section is arranged. The heating wire mounting grooves are respectively formed in the outer side faces of the heating metering section and the heating protection section on the fins 16, the heating wire mounting grooves are long-strip-shaped and are arranged along the length direction of the fins 16, the two ends of each heating wire mounting groove in the heating metering section are close to the two ends of the heating metering section, the two ends of each heating wire mounting groove in the heating protection section are close to the two ends of the heating protection section, heating wires are respectively mounted in the heating wire mounting grooves, and refractory materials are coated on the heating wire mounting grooves to cover the heating wires. The fire-resistant materials are all fire-resistant cement, the thermocouple and the heating wire are led out by leads and are connected to an external control cabinet through connecting wires, and the external control cabinet is connected to a computer.
The thermocouple and the heating wire are distributed specifically as follows: the number of the fins 16 at the top end is set to be No. 1, counting is carried out from one side from No. 1, a couple and heating wires are distributed on the fins No. 1, no. 3, no. 7, no. 11 and No. 15, from the end part of the heating and metering section on the same side of the fins, the end part of the heating and metering section of the couple on the fin No. 1 is 80cm, the end part of the heating and metering section of the couple on the fin No. 3 is 140cm, the end part of the heating and metering section of the couple on the fin No. 7 is 20cm, the end part of the heating and metering section of the couple on the fin No. 11 is 50cm, and the end part of the heating and metering section of the couple on the fin No. 15 is 110cm.
In use, when the rotating hand wheel 3 is rotated, the rotating hand wheel 3 drives the screw rod 11 to rotate, the screw rod 11 rotates to drive the nut 12 to move along the screw rod 11, the nut 12 moves to drive the first supporting connecting rod 18 to move, the first supporting connecting rod 18 moves to drive the sliding part 14 to slide on the fixed sliding rail 13, because one end of the third supporting connecting rod 20 is hinged to the hinged shaft, and the other end of the third supporting connecting rod is fixed on the fixed sliding rail 13 through the fixing part 15, after the sliding part 14 slides, the vertical distance between the fin 16 and the fixed sliding rail 13 can be changed through the second supporting connecting rod 19, two ends of which are hinged, and therefore the diameter of the heating device 1 can be changed.
The dimensions of the tubular sample that can be measured using the thermal conductivity meter of the present invention are in the range: the inner diameter phi is 40 mm-325 mm, and the wall thickness is 5 mm-120 mm. The steps for determining the thermal conductivity of the tubular sample are as follows:
step (1): sleeving a tubular sample (1200 multiplied by phi 89 multiplied by 50) mm to be tested outside the heating device 1, adjusting and rotating the hand wheel 3 to expand the fins to proper positions, and enabling the sample to be in full-area contact with the fins 16 of the heating device 1.
Step (2): the thermocouple patches were fixed to the outer surface of the sample at predetermined positions. And finally, coating the external protection heat-insulation material outside the sample to ensure that the protection material is in close contact with the sample.
And (3): the method comprises the following steps of starting testing, controlling through an external computer and a control cabinet, wherein the control cabinet comprises a plurality of voltage meters and ampere meters with adjustable measuring ranges, selecting a proper measuring range according to needs, presetting parameters such as heating rate, constant temperature time and cooling rate, controlling a galvanic couple through the computer so as to monitor the temperature of a heating metering section and a heating protection section on two sides of the galvanic couple, controlling the heating temperature of a heating wire, collecting ammeter information data, and calculating the heat conductivity coefficient of a tubular sample.
The method for measuring the maximum service temperature of the tubular sample by using the heat conduction instrument comprises the following steps:
step (1): the first layer of pipe shell-shaped test sample to be tested with the specification of (2000 x phi 89 x 30) mm is sleeved outside the heating device 1, the longitudinal seam of the pipe shell is within an angle range of 45 degrees above and below the horizontal plane of the heating pipe to reduce heat leakage, the hand wheel 3 is adjusted and rotated to spread the fins to a proper position, the pipe fitting is completely contacted with the fins 16 of the heating device 1, the hand wheel is locked, and the thermocouples are uniformly arranged along the outer surface of the test sample.
Step (2): and sleeving a pipe shell-shaped sample to be measured with the specification of (2000 x phi 149 x 30) mm on the second layer of the sample outside the first layer of the sample, wherein the joint position of the pipe shell meets the condition that the pipe shell is positioned in the range of 45 degrees above and below the horizontal plane of the heating pipe, and the pipe shell and the inner layer of the pipe shell are subjected to staggered joint installation. In order to ensure that the tubular sample is tightly attached, aluminum tapes or aluminum wires can be respectively fixed at the positions 80mm away from the end points and in the middle of the two ends of the sample, thermocouples are uniformly arranged on the outer surface of the second layer of the tube shell, and the rest of outer layer materials (2000 multiplied by phi 209 multiplied by 30), (2000 multiplied by phi 269 multiplied by 30) and (2000 multiplied by phi 329 multiplied by 30) are installed in the above manner.
And (3): the method comprises the following steps of starting testing, controlling through an external computer and a control cabinet, wherein the control cabinet comprises a plurality of voltage meters and ampere meters with adjustable measuring ranges, selecting a proper measuring range according to needs, presetting parameters such as heating rate, constant temperature time and cooling rate, controlling a galvanic couple through the computer so as to monitor the temperature of a heating metering section and a heating protection section on two sides of the galvanic couple, controlling the heating temperature of a heating wire, collecting ammeter information data, and collecting related temperature data to compare the highest service temperature of a tubular sample with a given temperature.
The above-mentioned techniques not specifically mentioned refer to the prior art.
As noted above, while the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limited thereto. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. The variable-diameter heat conduction instrument is characterized by comprising a rack and a heating device arranged on the rack; the rack comprises two mounting plates, and the mounting surfaces on the two mounting plates are opposite and parallel; the heating device comprises a screw rod, a plurality of nuts in threaded connection with the screw rod, a plurality of fixed slide rails and a plurality of fins with the length smaller than that of the fixed slide rails, wherein the number of the fixed slide rails is the same as that of the fins;
the screw rod comprises a threaded section and two polished rod sections connected to two ends of the threaded section, the two polished rod sections respectively penetrate through the two mounting plates and can rotate relative to the mounting plates, and the threaded section is positioned between the two mounting plates;
each fixed slide rail is parallel to the screw rod and is uniformly distributed around the screw rod, two ends of each fixed slide rail are respectively arranged on the installation surfaces of the two installation plates, the vertical distances between each fixed slide rail and the screw rod are equal, each fixed slide rail is provided with a limiting piece group, the number of the limiting piece groups on each fixed slide rail is equal to that of nuts, each limiting piece group comprises a sliding piece and a fixing piece, the sliding piece is limited on the fixed slide rail and is connected with the fixed slide rail in a sliding mode, the fixing pieces are fixed on the fixed slide rails, and the sliding piece and the fixing piece on each fixed slide rail are alternately distributed;
each fin is parallel to the screw rod and located on the outer side of the fixed slide rail, one surface, opposite to the fixed slide rail, of each fin serves as an inner side surface, one surface, far away from the fixed slide rail, of each fin serves as an outer side surface, mounting frames are arranged on the inner side surfaces, the number of the mounting frames on each fin is the same as that of the nuts, and each mounting frame is provided with a hinge shaft;
a plurality of first supporting connecting rods are uniformly distributed on the peripheral surface of each nut around the circumference, and the number of the first supporting connecting rods on each nut is the same as that of the fixed sliding rails;
the method comprises the following steps that a nut, a limiting piece group and an installation frame which are adjacent to an installation surface are connected from the installation surface on one side as a first group, and the like is provided with a second group, namely an nth group, wherein in each group, one end of each first support connecting rod is fixed with the nut, the other end of each first support connecting rod is fixed with a sliding piece in the limiting piece group, the first support connecting rods are perpendicular to a screw rod and a fixed sliding rail, the sliding pieces are connected with hinged shafts of a fin installation frame through second support connecting rods, the two ends of each second support connecting rod are hinged, the hinged shafts of the installation frame are connected with fixing pieces in the limiting piece group through third support connecting rods, one ends of the third support connecting rods are hinged on the hinged shafts, the other ends of the third support connecting rods are fixed on the fixing pieces, and the projection of the hinged shafts of the installation frame on the fixed sliding rails is positioned between the connecting points of the second support connecting rods on the sliding pieces and the connecting points of the third support connecting rods on the fixing pieces;
the two sides of the outer side surfaces of a plurality of fins in the fins are respectively provided with a couple mounting groove parallel to the mounting surface of the mounting plate, the couple mounting grooves on the two sides divide the fins into a heating metering section positioned in the middle and heating protection sections positioned on the two sides, the outer side surface of the heating metering section on the fins is also provided with a couple mounting groove, each couple mounting groove is provided with a couple, and the couple mounting groove is coated with a refractory material to cover the couple; heating wire mounting grooves are respectively formed in the outer side faces of the heating metering section and the heating protection section on the fins, heating wires are mounted in the heating wire mounting grooves, the heating wires are coated with refractory materials to cover the heating wires, and leads are led out from the couples and the heating wires.
2. The variable diameter thermal conductivity meter of claim 1, wherein the frame includes a base plate, and the mounting plates are vertically fixed to the base plate.
3. A variable diameter thermal conductivity instrument according to claim 2, wherein both lightbar sections are mounted on the two mounting plates by bearings.
4. A variable diameter thermal conductivity instrument according to claim 3, wherein a rotating hand wheel is mounted to the end of one side rod section which extends beyond the mounting plate.
5. The variable diameter thermal conductivity apparatus of claim 4, wherein the fixed rail is circular in cross-section, the sliding member is a collar, and the fixed member is a fixed block.
6. The variable diameter thermal conductivity meter of claim 5, wherein the fins have ends spaced from the mounting surfaces by a distance of 10mm.
7. The variable-diameter thermal conductivity meter according to claim 6, wherein the number of fins is 16, and the topmost fin is set to be number 1, counting is performed around the circumference from 1 to one side, the thermocouples and the heating wires are distributed on the fins No. 1, no. 3, no. 7, no. 11 and No. 15, and from the end of the heating and metering section on the same side of the fin, the thermocouple on the fin No. 1 is 80cm away from the end of the heating and metering section, the thermocouple on the fin No. 3 is 140cm away from the end of the heating and metering section, the thermocouple on the fin No. 7 is 2cm away from the end of the heating and metering section, the thermocouple on the fin No. 11 is 50cm away from the end of the heating and metering section, and the thermocouple on the fin No. 15 is 110cm away from the end of the heating and metering section.
8. The variable diameter thermal conductivity meter according to claim 7, wherein the heater strip mounting groove is elongated and is disposed along the length of the fin, the two ends of the heater strip mounting groove on the heater metering section are located near the two ends of the heater metering section, and the two ends of the heater strip mounting groove on the heater protection section are located near the two ends of the heater protection section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210982512.7A CN115343329A (en) | 2022-08-16 | 2022-08-16 | Diameter-variable heat conduction instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210982512.7A CN115343329A (en) | 2022-08-16 | 2022-08-16 | Diameter-variable heat conduction instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115343329A true CN115343329A (en) | 2022-11-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210982512.7A Pending CN115343329A (en) | 2022-08-16 | 2022-08-16 | Diameter-variable heat conduction instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115343329A (en) |
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2022
- 2022-08-16 CN CN202210982512.7A patent/CN115343329A/en active Pending
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