164 results about "Thermocouple Wire" patented technology

The multi-measuring-point armored alloy thermocouple comprises a thermode, a metal armored layer arranged outside the thermode in a sleeving mode and an insulating material filled between the thermode and the metal armored layer, a plurality of metal wires of the thermode are made of copper-nickel alloy materials and are arranged in order, one ends of the metal wires are welded to form a measuring end, and the other ends of the metal wires are welded to form a welding end. The metal armor layer adopts a layered structure design and is composed of an innermost layer, a middle layer and an outermost layer; the metal armoring layer adopts a spiral winding armoring structure design, and an armoring material is wound around the thermocouple wire in a spiral mode. According to the invention, research is carried out from the aspects of structure, process method, dynamic characteristics, numerical simulation, alloy material components and the like, and analysis and inspection are carried out in combination with the means of theoretical analysis, experimental test and the like, so that the use of precious thermocouple materials is effectively reduced; and finally, the comprehensive performances such as the bending quality, the dynamic response time, the measurement precision, the stability and the manufacturing cost of the armored cable are improved.

The invention discloses a lithium battery internal temperature monitoring device and method and a lithium battery, the lithium battery internal temperature monitoring device comprises at least one thermocouple wire penetrating through at least one preset through hole in a battery cover plate, one end of the thermocouple wire is in contact with a battery cell in a shell, and the other end of the thermocouple wire is in contact with the battery cell in the shell. The other end is connected with data acquisition equipment outside the battery cover plate; the preset through hole is filled with a sealant solution, the interior of the preset through hole is filled with the sealant solution, and the thermocouple wire is fixed; sealing gaskets are arranged on the surfaces of the upper side and the lower side of the preset through hole, and the thermocouple wire penetrates through inner rings of the sealing gaskets. The temperature of different positions in the battery can be monitored in real time, the overall sealing performance of the battery can be guaranteed by designing the I-shaped sealing structure, the hollow insulating layer of the thermocouple wire can prevent electrolyte from flowing out along the thermode, and the safety of the lithium battery in the using process is guaranteed.

The invention discloses a system and a method for testing preheating performance of a fused salt heat absorber of a photo-thermal power station after freezing. The testing system comprises a support frame, a fused salt heat absorber tube panel simulator, a thermocouple wire group, a data acquisition instrument, a simulation photo-thermal source, a water storage tank and a heat flow measuring device. According to the invention, the preheating performance of the fused salt heat absorber under different icing conditions can be measured, and data support and guidance can be provided for solving the preheating problem of the on-site fused salt heat absorber under the icing state.

A thermocouple assembly (100) includes a first thermocouple wire (106) and a second thermocouple wire (108). A body (104) is configured to electrically isolate the first (106) and second (108) thermocouple wires from each other. A metallized cap (102) is provided having a conductive inner surface (110). The body (104) is engaged within the metallized cap (102) to urge the first (106) and second (108) thermocouple wires into contact with the conductive inner surface (110) of the metallized cap (102). The first thermocouple wire (106), second thermocouple wire (108) and conductive inner surface (110) of the metallized cap (102) form a thermocouple.

The application discloses a nuclear power steam generator thermocouple wire and fixing piece bending device. The device clamps and fixes two ends of the fixing piece respectively, inserts the thermocouple wire into the fixing piece, and realizes S-shaped bending of the thermocouple wire and the fixing piece by pressing one end of the fixing piece. In the bending process, the bending slider and the lower clamping plate of the hot end realize smooth guiding to the fixing piece, so that no indentation is caused on the hot end thermocouple wire, and the internal thermal sensing wire of the thermocouple wire is not damaged. The bending size can be determined by measuring the distance of the bending slider extending out of the shell.

The invention relates to a preparation method of a molybdenum-niobium thermocouple wire, according to the method, dispersion strengthening and toughening are adopted, the problem of uniformity of molybdenum-niobium alloy components is solved through a method of combining high-energy ball milling, vacuum gradient sintering and electron beam melting, and the prepared molybdenum-niobium alloy thermocouple wire is high in thermoelectric stability and precision through drawing and surface treatment. The high-temperature-resistant strength and the neutron irradiation-resistant performance are good.

The utility model provides a high-temperature-resistant thermocouple of an incinerator, which belongs to the technical field of thermocouples and comprises a thermocouple wire and a junction box, an inner alundum tube, a middle alundum tube and an alloy protection tube are sequentially sleeved outside the thermocouple wire from inside to outside, and a packing nut is arranged at the upper end of the alloy protection tube. A first positioning groove matched with the filler nut is formed in the end, close to the alloy protection pipe, of the filler nut, a second positioning groove is formed in the end, close to the filler nut, of the alloy protection pipe, a positioning disc matched with the second positioning groove is arranged at the upper end of the middle alundum pipe, and the positioning disc abuts against the position between the second positioning groove and the filler nut. The packing nut is welded with the alloy protection tube; according to the utility model, the packing nut, the alloy protection tube and the medium alundum tube are quickly and accurately aligned, so that the relative position accuracy of each component is ensured before welding, the assembly difficulty is reduced, the problem of troublesome later modification caused by inaccurate early-stage alignment is avoided, and the assembly efficiency and accuracy are improved.

The thermocouple temperature measuring device comprises a positive thermocouple wire, a negative thermocouple wire, a first protective tube and a wire connector, the positive thermo wire and the negative thermo wire are arranged in the first protective tube; one end of the positive thermo wire and one end of the negative thermo wire are connected to the wire connector, and the wire connector is used for connecting the positive thermo wire and the negative thermo wire to an external circuit; the other end of the positive thermo wire is connected with the other end of the negative thermo wire to form a combination end, and the combination end is coated with a high-temperature insulating layer. The thermocouple can replace a sheathed thermocouple, the detection cost is reduced, the risk of contact conduction with a furnace wire can be reduced, the safety can be improved, and the service life can be prolonged.

This invention belongs to the field of arc heater technology and discloses a testing device and method for testing the arc spot position and rotation speed of an arc heater. During the test, a wireless data acquisition device, powered by a battery, is installed on the high-voltage rear electrode of the arc heater. The wireless data acquisition device is electrically isolated from other components and the ground. Several thermocouples are installed at equal intervals along the axis on the cathode wall of the inner shell of the electrode. The thermocouple wires are connected to the wireless data acquisition device through a cooling channel. After acquiring the temperature value, the wireless data acquisition device transmits it to the wireless AP in the test hall via a wireless transmitter, and then to the industrial control computer. Based on the obtained temperature value, the operator determines the axial coordinate of the arc spot, determines the rotation speed of the arc spot, calculates the heat flux value of the arc spot, and captures motion images of the arc spot. The testing device and method provide data support for the control of the arc spot position and rotation speed of the arc heater, thereby improving electrode lifespan and reducing the operating cost of the arc heater.

The utility model relates to the field of welding equipment, in particular to an automatic butt-welding machine for a hot end of a thermocouple wire, which is characterized in that two wire discs are arranged at one end of a table body, a wire gathering pipe extending along the length direction of the table body is arranged in the middle of the table body, and two strands of wires are respectively released by the two wire discs and penetrate through the wire gathering pipe; a translation mechanism sliding in the length direction of the table body is arranged on the table body on the side, away from the wire disc, of the wire gathering pipe, and a welding head used for welding the free ends of the two strands of wires is fixedly installed on the translation mechanism; the translation mechanism is further provided with a wire drawing clamp used for clamping two strands of wires, the table body is provided with a lifting mechanism, and the lifting mechanism is provided with scissors used for cutting off the two strands of wires between the wire drawing clamp and the wire gathering pipe. The ends of the two strands of silk threads in the splayed shape are attached through axial movement of the silk gathering pipe, and butt welding is conducted on the ends of the two strands of silk threads through movement of the carbon rod.

The present invention discloses a device and method for measuring the temperature of the inner wall of a pipeline based on a movable airbag. The device includes: an inflatable support rod, located inside the pipeline, and having a plurality of inflation holes distributed thereon for supporting and inflating the airbag; the airbag, the center of which is fixed to the inflatable support rod, and through inflation, a glass fiber cloth is pressed against the pipeline wall surface, so that a thermocouple measuring point arranged between the glass fiber cloth and the pipeline is closely attached to a temperature measurement position on the inner wall of the pipeline; the glass fiber cloth, which has an opening at the bottom and a hole at the center of the top, covers the outside of the airbag, and a curable resin is permeated and distributed in the glass fiber cloth; a thermocouple, including a thermocouple measuring point and a thermocouple wire, wherein the thermocouple measuring point is adhered to a set position outside the glass fiber cloth and enters the pipeline together with the glass fiber cloth and the airbag, and the thermocouple wire is led out of the pipeline. The temperature measurement method is as follows: pre-fill the airbag with a certain amount of gas, ensuring that the airbag diameter is larger than the top hole diameter of the glass fiber cloth and smaller than the inner diameter of the pipe. Place the temperature measuring device in the pipe, aligning the thermocouple measuring point with the designated temperature measurement location. Then, inflate the airbag via the inflatable support rod to a matching pressure, ensuring that the glass fiber cloth covering the airbag is tightly attached to the inner wall of the pipe at the designated temperature measurement location. Press the thermocouple attached to the glass fiber cloth against the pipe wall, maintaining constant pressure in the airbag. Allow the resin in the glass fiber cloth to cure naturally until it is fully cured. The glass fiber cloth takes shape under the action of the resin, while the thermocouple remains pressed against the pipe wall. After the resin cures, deflate the airbag, reclaim the air, and complete the arrangement of the pipe wall temperature measuring points before measuring the pipe wall temperature.

The application discloses a thermocouple suitable for temperature measurement of an internal combustion engine piston, and the thermocouple comprises a thermocouple wire and an armored sleeve, the armored sleeve comprises a large-end and a small-end, and the large-end is installed on the high-temperature gas side. The middle surface between the large-end and the small-end bears the pressure of the high-temperature gas in the piston, and simultaneously plays a sealing role, so that the high-temperature gas is prevented from leaking out from the gap between the piston and the thermocouple. The application further discloses a mounting method of the thermocouple suitable for temperature measurement of the internal combustion engine piston. For a monolithic piston, different mounting modes are selected according to the temperature measurement point position of the piston. For a combined piston, a protective sleeve is arranged between the piston crown and the piston skirt, and the thermocouple extension line passes through the protective sleeve, so that the thermocouple can work reliably and stably in the harsh environment of high temperature and high pressure.

The utility model discloses a zero-response temperature measurement assembly resistant to high-speed thermal shock, and relates to the field of temperature measurement. According to the utility model, the problem that the fitting degree between the thermocouple wire temperature measuring point and the housing cannot be accurately ensured and the real-time accurate measurement is influenced because the temperature measuring point of the thermocouple wire is separated from the armored housing by a certain distance in the existing temperature measuring assembly is solved. A temperature sensitive assembly (2) is inserted in an armored protective tube (1) and is installed in the armored protective tube (1) through an installation assembly. The tungsten-rhenium thermocouple (2-3) is installed in the silicon nitride porcelain tube (2-2), the silicon nitride porcelain tube (2-2) is installed in the framework (2-1), the front portion of the tungsten-rhenium thermocouple (2-3) is welded into a sphere and then fixedly connected with the framework (2-1) into a whole in a welding mode, and the framework (2-1) is screwed at the bottom of the front end of the armored protection tube (1). The device is used for measuring the tail flame temperature of the high-speed aircraft.

The invention relates to the technical field of automobile maintenance, and discloses a temperature detection device which comprises a clamping handle, a thermocouple wire, a metal sheet and a circuit assembly. The two clamping handles are connected in a hinged mode, each clamping handle comprises a clamping end, the clamping ends of the two clamping handles are oppositely arranged, the clamping end of at least one clamping handle is provided with a metal sheet, the metal sheet comprises a heat conduction face, the heat conduction face is located on the face, close to the other clamping handle, of the corresponding metal sheet, a through hole is formed in the metal sheet, and one end of the thermocouple wire penetrates through the through hole to be connected with the corresponding metal sheet. The other end of the thermocouple wire is electrically connected with the circuit assembly, and the circuit assembly is arranged on the clamping handle. Due to the arrangement of the through hole, one end of the thermocouple wire can be in direct contact with the pipeline, and the temperature of the pipeline is directly transmitted to the thermocouple wire. The temperature of the pipeline is detected through the other end of the thermocouple wire, a temperature signal is formed, the temperature signal is transmitted to the circuit assembly, and then the circuit assembly transmits the temperature signal to the server.

The invention discloses a connecting mechanism of a thermocouple wire and a thermocouple plug, and belongs to the technical field of thermocouple wires and thermocouple plugs, the connecting mechanism comprises the thermocouple plug and the thermocouple wire, the thermocouple plug is provided with a positioning shaft, the positioning shaft is provided with a rotation limiting rod, the thermocouple plug is provided with a rotation ring, and the rotation limiting rod is provided with a rotation limiting rod. A pushing block is arranged on the inner surface of the rotating ring, and a positioning bolt is installed on the pushing block. According to the butt joint device for the thermocouple plug and the connecting wire, through the unique combined design of the rotating ring, the pushing block, the rotating limiting rod and the positioning shaft, tight connection of the thermocouple wire and the plug is achieved, and under the action of the rotating ring, the pushing block drives the rotating limiting rod to rotate, so that the thermocouple wire is firmly limited in the plug; the problem of loose connection caused by frequent plugging or external vibration is effectively prevented, and continuous and stable transmission of temperature measurement data is ensured.

The utility model discloses a protective cap for a throwing type detection probe, and particularly relates to the technical field of metallurgy, which comprises a mounting plate, a thermocouple temperature sensing probe is mounted at the bottom of the mounting plate, a penetrating block is fixedly connected to the center of the top of the mounting plate, and a protective assembly is arranged on the outer surface of the thermocouple temperature sensing probe. A dismounting assembly is arranged at the top of the mounting plate, the protection assembly comprises two connecting plates, and two inserting holes are formed in the bottom of the mounting plate. According to the utility model, through the arrangement of the protection assembly, when the thermocouple temperature sensing probe is impacted by other objects, the spring is extruded to deform, and the impact force is buffered and offset, so that the thermocouple wire is prevented from being deformed, bent, twisted and even fractured due to direct stress; the temperature sensitive characteristic and the thermoelectric conversion function are maintained, the insulation layer of the probe can be protected from being damaged by external collision, and the good insulation performance is maintained.

The invention relates to the technical field of refrigeration appliance testing, and discloses a thermocouple wire processing device for testing, which comprises a guide part, a thermocouple wire fixing part and a wire cutter. The thermocouple wire fixing part is arranged in the guide part, and the outer wall of the thermocouple wire fixing part is rotationally connected with the inner wall of the guide part; the wire cutter is arranged at the upper end of the guide part, a wire cutting hole is formed in the inner side of the wire cutter, and the end part of the thermocouple wire can penetrate through the wire cutting hole to extend into the guide part; wherein the end part of the thermocouple wire to be processed can be fixed on the thermocouple wire fixing part, and under the condition that the thermocouple wire fixing part is driven to rotate, the thermocouple wire fixing part can move towards or back to the wire cutter along the inner wall of the guide part. According to the thermocouple wire stripping device, the stripping length of the thermocouple wire can be accurately controlled while the thermocouple wire is efficiently stripped, the processing efficiency of the thermocouple wire for testing is improved, and the testing efficiency of the refrigeration appliance is further improved.

The utility model provides a double-core precious metal thermocouple structure, which comprises a wiring platform, a thermocouple assembly, a wiring assembly and a shell assembly, the wiring platform is respectively provided with two thermocouple mounting holes and a second test hole, the thermocouple mounting holes and the second test hole respectively penetrate through the wiring platform along a first direction, and the two thermocouple mounting holes are communicated with the wiring assembly. The thermocouple assembly comprises a thermocouple insulation tube, a thermocouple wire, an inner protection tube and a standard thermocouple, the inner protection tube is installed in the thermocouple installation hole, and the inner protection tube is of a hollow structure; two thermocouple wire penetrating holes are formed in the thermocouple insulating tube in a penetrating mode in the first direction. A standard thermocouple for testing the system precision is detachably inserted into the second test hole; two paths of independent temperature signals can be effectively measured and output through a double-core structure; and difficulty and time consumption caused by frequent wire threading after the whole device is disassembled during maintenance and thermocouple wires are drawn out are avoided.

The utility model relates to the technical field of thermocouples, in particular to an extended thermocouple and a high-temperature vacuum heating furnace, and the extended thermocouple comprises a pipe sleeve and a thermocouple wire. The pipe sleeve comprises a straight section and a first bent section, the first bent section is arranged at one end of the straight section, and a temperature measuring point is arranged at the end point, deviating from the straight section, of the first bent section; and the thermocouple wire is arranged to the temperature measuring point along the straight section and the first bent section. The extended thermocouple and the high-temperature vacuum heating furnace provided by the utility model can effectively increase the length of the thermocouple wire in the temperature measurement container, thereby reducing the too fast heat loss from the temperature measurement point of the thermocouple to the external binding post, enabling the temperature measured by the temperature measurement point to be closer to the actual temperature, and improving the measurement precision of the measurement end of the thermocouple.

The present invention relates to a temperature measuring device comprising a measuring element (12; 112), a connection element (14; 114) having a housing, a line arrangement (16; 116), the line arrangement (16; 116) at least in sections comprising connection lines (46; 146), at least one thermocouple having at least two different thermocouple wires (32; 132; 232, 236a, 236b, 236c), the two thermocouple wires (32; 132; 232, 236a, 236b, 236c) being connected to one another at a measuring point and in each case so as to form a connecting point with a connection line, the measuring point being provided in the measuring element (12; 112) and the connecting points being located inside the housing of the connection element (14; 114), the line arrangement (16; 116) having a first line portion (40; 140) with an outer sheath (44; 144), in which the at least two connection lines (46; 146) are routed, the first line portion being fixedly connected to the connection element (14; 114) in the region of a first end and the interior of said first line portion being filled with an electrically insulating, high-temperature-resistant material at least in the region of the first end.

This utility model relates to a thermocouple fixing structure, including a thermocouple wire groove disposed on any surface of a plate. A tail fixing position is provided at one end of the thermocouple wire groove, and a probe fixing position is provided at the remaining end of the thermocouple wire groove. Several wire-clamping blocks are respectively provided on both sides of the thermocouple wire groove, following its direction. The advantages are: this structure can be designed into any curved shape and laid on the plate surface according to actual temperature measurement needs, breaking through the strict limitations of traditional fixing methods on the position and path of the temperature measurement point; the tail fixing position, probe fixing position, and wire-clamping blocks constitute a multi-level fixing system. During installation, the thermocouple wire is simply pressed into the thermocouple wire groove to complete the installation, effectively solving the problems of complex installation and insecure fixing in existing technologies, and achieving convenient, reliable, and accurate surface temperature measurement.

The invention discloses a temperature acquisition method for a soft package battery, which comprises the following steps of: 1, preprocessing the soft package battery, implanting a thermocouple wire into a battery cell, and monitoring the internal temperature of the soft package battery through the thermocouple wire; step 2, inserting a plurality of shelving steps in the charging / discharging process so as to eliminate the influence of current crosstalk; in the shelving step, external current is cut off, so that the interior of the soft package battery enters a non-current state; and 3, in each shelving step, collecting internal temperature data of the soft package battery by taking 5 seconds as a reference duration to directly monitor the internal temperature of the battery cell, breaking through the bottlenecks of internal-external temperature difference and response delay, realizing high-precision, high-efficiency and low-cost monitoring of the internal temperature of the battery, and remarkably improving the safety and the service life of the battery.

The utility model relates to a tri-redundancy thermocouple wire welding tool, which is used for welding a tri-redundancy thermocouple workpiece and comprises a hexagonal cylinder and a cylindrical cylinder arranged at the end of the hexagonal cylinder, the hexagonal cylinder is communicated with the inside of the cylindrical cylinder, the tri-redundancy thermocouple workpiece comprises a binding post and three groups of thermocouple wires, and the binding post is connected with the cylindrical cylinder. The binding post is inserted into the end, away from the cylindrical column body, of the hexagonal column body, a limiting blind hole mainly located in the center of the hexagonal column body is formed in the hexagonal column body, and three limiting through holes evenly distributed around the limiting blind hole are formed in the periphery of the limiting blind hole. A limiting threaded hole transversely extending into the hexagonal cylinder is formed in the side wall of the hexagonal cylinder, three threaded through holes are formed in the side wall of the cylindrical cylinder, and in a word, the three-redundancy thermocouple forming die has the advantages of being simple in structure, convenient to use, high in reliability, good in forming effect and capable of effectively improving the percent of pass of three-redundancy thermocouple workpieces.

This utility model relates to the field of kitchenware testing technology, and in particular to a fixing device for a wireless temperature and pressure recorder for testing the energy efficiency of an electric pressure cooker. The device includes a fixing frame, which comprises an adjustable-length support leg, a position indicator circle, a vertical limiting rod, a horizontal drag ring, and an adjusting buckle. The adjustable-length support leg is disposed on the position indicator circle and is used to fix and support the fixing frame while maintaining contact with the bottom surface of the inner pot. The vertical limiting rod is detachably connected to the adjustable-length support leg. One end of the adjusting buckle is fixedly connected to the horizontal drag ring, and the other end is slidably sleeved on the vertical limiting rod, used to adjust and lock the position of the horizontal drag ring in the vertical direction. This utility model solves the problems existing in the prior art, such as the inability to fix the position of the wireless temperature and pressure recorder in the inner pot, large test result errors caused by using other wired thermocouples, low test efficiency, easy breakage of thermocouple wires, and easy impact on the sealing performance of the electric pressure cooker.

The utility model belongs to the technical field of data acquisition instrument accessories, and particularly relates to an installation assembly of a data acquisition instrument, which comprises a top seat, a rear baffle plate, a front baffle plate and a plurality of thermocouple plugs, the top end of the rear baffle is fixedly connected with the top base, the bottom end of the rear baffle extends inwards to be provided with a bottom baffle, the top end of the front baffle is hinged to the bottom base, and a magnetic attraction device is arranged between the bottom end of the front baffle and the bottom baffle. A plurality of thermocouple sockets are installed and fixed through the top seat, the bottom baffle and the front baffle are closed and fixed through the magnetic attraction device, the rear baffle, the bottom baffle and the front baffle act on the data acquisition instrument at the same time, and in the using process, the electric plugging end of the data acquisition instrument and the wiring end of the thermocouple female end can be relatively static; and on the other hand, by plugging and unplugging the thermocouple plug, the number of detection channels is increased or decreased, and the application range of the device is widened.

A thermocouple temperature acquisition device is adapted to connect a thermocouple wire. The thermocouple temperature acquisition device includes a casing, a circuit board, a wiring assembly and a temperature sensing assembly. The casing is formed with a receiving space. The circuit board is disposed in the receiving space. The wiring assembly is disposed on the circuit board and partially exposed outside the casing. The part of the wiring assembly exposed outside the casing is used to connect the thermocouple wire and forms a cold end with the thermocouple wire. The temperature sensing assembly includes a temperature sensor and a heat conducting element. The temperature sensor is electrically connected to the circuit board and located in the receiving space. The heat conducting element is disposed on the temperature sensor and partially exposed outside the casing. The heat conducting element is adjacent to the part of the wiring assembly exposed outside the casing. The temperature sensor measures the temperature of the cold end through the heat conducting element.

The invention relates to the technical field of aero-engine testing, in particular to a shunting ring wall temperature testing wiring process and a testing structure. The invention provides a shunting ring wall temperature test wiring process. The shunting ring wall temperature test wiring process comprises the following steps of S1, forming a lead through hole and a lead groove in a shunting ring; s2, preparing a test sensor with a bare thermocouple wire end part; s3, a test sensor is installed in the lead wire groove, and a thermo wire of the test sensor penetrates through the lead wire through hole; and S4, covering a pressing sheet above the lead groove, and fixing the pressing sheet. A through hole and groove structure used for temperature testing and lead connection is designed on the thin-wall wall surface of the shunting ring, the groove is filled with the heat-conducting gel, and the sheathed thermocouple with the bare thermocouple wires is combined for wall temperature testing, so that the response speed during wall temperature testing is remarkably increased, and the accuracy of wall surface temperature testing of the shunting ring is ensured.

The utility model relates to the technical field of thermocouple wire measurement, in particular to a thermocouple wire take-up device, which comprises a spool, the spool comprises a cylindrical tube and guard plates fixed on two sides of the cylindrical tube, two ends of the cylindrical tube are respectively and rotatably provided with a left support shaft and a right support shaft, one end of the left support shaft is connected with a volute spiral spring, and the other end of the left support shaft is connected with a right support shaft. A conductive slip ring is mounted at one end of the right supporting shaft and comprises a slip ring stator and a slip ring rotor, the slip ring stator is connected with the protective plate, and the slip ring rotor is fixed to the right supporting shaft; a thermocouple body is fixed on the side wall of the cylindrical tube, the input end of the thermocouple body is connected with an input wire, the output end of the thermocouple body is connected with a wire, the wire is connected with the slip ring stator, the slip ring rotor is connected with an output wire, and the input wire is wound on the cylindrical tube. The thermocouple wire take-up device can take up the thermocouple wire actively, and meanwhile the thermocouple wire cannot be bent in the take-up process.

The invention relates to the technical field of stuffing sand testing, and discloses a method for testing the heat-conducting property of stuffing sand. The method comprises the steps that S1, heat flow calibration is conducted, specifically, a test furnace body is built and comprises an air valve, a hydraulic rod, a furnace body upper cover, a thermocouple, a high-temperature-resistant crucible, a heat insulation and heat preservation furnace body, a heating thermocouple wire, a hydraulic control system, an air compression control system and a temperature display system, and the lower side and the horizontal periphery of the heating thermocouple wire are surrounded by the heat insulation and heat preservation furnace body; the high-temperature-resistant crucible is placed on the heating thermocouple wire, four thermocouple grooves extending inwards are formed in the inner side of the cylinder wall of the high-temperature-resistant crucible, a certain amount of a stuffing sand sample to be tested is contained in the high-temperature-resistant crucible, and a furnace body upper cover with an air valve and a hydraulic rod covers the high-temperature-resistant crucible. A sealing gasket is arranged at the joint of the furnace body upper cover and the hydraulic rod to guarantee airtightness. The problems that an existing device is large in testing error, small in application range and the like are solved.

The present invention discloses a large-diameter cable test model and a closed-space fire resistance test method thereof. The model comprises a cable test model composed of multiple strands, the dimensions of which are calculated by a predetermined formula, the strands being reduced in proportion to the predetermined formula, and an annular steel clamp at each end of the model. The model also includes pre-embedded thermocouples. During model fabrication, the number of strands to be welded with thermocouples is counted according to predetermined target measuring points, and the thermocouples are welded to the surface of the strand measuring points. During model fabrication, the strands with thermocouples are positioned in a predetermined order according to the measuring point locations, the thermocouple wires are led out through the strand gaps, and steel gaskets are installed on the exposed thermocouple surfaces of the model to isolate the flame. The model surface is coated with a fireproof and anti-corrosion layer, and the model is placed in a test furnace for fire resistance testing. The present invention primarily studies the effects of different fire conditions, fire protection, and fire exposure time on heat transfer and thermal damage of large-diameter cables, and verifies the actual fire resistance performance of fireproof materials.