CN216144531U - High-temperature furnace energy efficiency test system - Google Patents
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Abstract
The utility model discloses a high-temperature furnace energy efficiency test system, which comprises: a box-type resistance furnace temperature testing device and an energy efficiency testing device; the box-type resistance furnace temperature testing device comprises a box-type resistance furnace temperature testing support, a temperature testing thermocouple anode wire, a temperature testing thermocouple cathode wire, a thermocouple protective film, a compensation lead and a temperature data acquisition and recording device; the energy efficiency testing device comprises energy consumption testing equipment, a control module and a connecting wire. Based on the device, the utility model also provides a box type resistance furnace energy efficiency testing method for the laboratory, which comprises a box type resistance furnace empty furnace heating energy efficiency testing method and a box type resistance furnace empty furnace constant temperature energy efficiency testing method. The energy consumption of the equipment is identified, the technical upgrading and the energy efficiency control of the equipment are indirectly promoted, the aims of saving energy and reducing consumption are finally achieved, the development and the progress of the industrial technology are promoted, and the energy consumption identification method contributes to creating a green laboratory.
Description
Technical Field
The utility model belongs to the technical field of resistance furnaces, and relates to a high-temperature furnace energy efficiency testing system.
Background
The box-type resistance furnace is widely applied to production and experiments in the fields of ceramics, metallurgy, electronics, glass, chemical engineering, machinery, biology, medicine, food, refractory materials, new material development, special materials, building materials and the like. The method is widely applied to the fields of sintering of metal materials and ceramic materials, heat treatment of single crystals, high-temperature re-sintering shrinkage of refractory materials, detection of quality inspection and drug test ash content, aerospace fatigue test and the like of various enterprises and public institutions, colleges and universities, scientific research institutes and inspection and detection institutions.
The energy efficiency standards of household appliances and automobiles at home and abroad have been tested and generally recognized, but the energy efficiency testing and calculating methods of laboratory high-energy-consumption equipment are still lacked. The use temperature of the box-type resistance furnace is usually 500 ℃ to 1200 ℃, resistance wires, silicon-carbon rods and silicon-molybdenum rods are used as heating elements, the power is from thousands of watts to dozens of kilowatts, the continuous working time is hours each time, the use frequency is high, the energy consumption is huge, and the box-type resistance furnace is a large power-consuming household in a laboratory. The research on the energy efficiency test method of the box-type resistance furnace promotes the development and progress of the industrial technology and also makes a contribution to creating a green laboratory.
The research on the energy efficiency test and calculation method of the box-type resistance furnace has the following purposes and meanings:
1. wide application field and more applicable industries
The box-type resistance furnace is widely applied to production and experiments in the fields of ceramics, metallurgy, electronics, glass, chemical engineering, machinery, biology, medicine, food, refractory materials, new material development, special materials, building materials and the like. The method is widely applied to the fields of sintering of metal materials and ceramic materials, heat treatment of single crystals, high-temperature re-sintering shrinkage of refractory materials, detection of quality inspection and drug test ash content, aerospace fatigue test and the like of various enterprises and public institutions, colleges and universities, scientific research institutes and inspection and detection institutions.
The box-type resistance furnace is used as a common laboratory analytical instrument, and the spanning development is realized in the last decade. After the trough period of 2007 to 2009, the development is very rapid from 2010, and the annual production of the box-type resistance furnace in 2014 exceeds ten thousand according to the wind related data statistics. In recent years, with the continuous deepening and increasing investment of aerospace research of basic materials in China, the market of box-type resistance furnaces is also increased year by year. The box-type resistance furnace is equipment which is conventionally configured by a detection technical mechanism and a laboratory, the quantity of the equipment required by a single professional laboratory is few, and more equipment is dozens, the service cycle of the equipment is usually about 10 years, and the requirement of the equipment is increasingly increased along with the continuous improvement of large-scale production enterprises on the quality control level of raw materials.
2. The demand for energy conservation and consumption reduction is increasingly outstanding
The use temperature of the box-type resistance furnace is usually 500 ℃ to 1200 ℃, resistance wires, silicon-carbon rods and silicon-molybdenum rods are used as heating elements, the power is from thousands of watts to dozens of kilowatts, the continuous working time is hours each time, the use frequency is high, the energy consumption is huge, and the box-type resistance furnace is a large power-consuming household in a laboratory. Because the products do not have an energy efficiency test standard method at present, manufacturers and users usually only pay attention to performance parameters of the products without considering the power consumption condition, and huge waste is caused to social energy. Some production enterprises are still producing products with high energy consumption and poor performance in order to save labor, reduce materials and pursue benefits. With the continuous improvement of the technology, the requirements of customers on energy conservation and environmental protection are continuously improved. Box resistance furnace manufacturing enterprises also hope to specially aim at the instrument to carry out parameter authentication, provide powerful authoritative data for the popularization and application of equipment, and gradually eliminate the laggard products.
The laboratory box-type resistance furnace is different from an industrial resistance furnace in use purpose, the laboratory box-type resistance furnace is mainly used for experimental analysis, sample test, product small test and the like, the power of the laboratory box-type resistance furnace is usually about 10 kW-50 kW, the use temperature needs to be adjusted according to the experiment requirement, the box body is usually small and is not used for producing and processing a large amount of furnace burden, and the box-type resistance furnace has the largest energy consumption in the temperature rise stage, so that the utility model mainly researches the test method and the calculation formula of the energy efficiency of the laboratory box-type resistance furnace, and researches and deduces the energy efficiency temperature changing and constant temperature energy efficiency test method and the calculation formula.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a box-type resistance furnace with high energy consumption and long service time in a laboratory, and a method for testing and calculating the energy efficiency of the box-type resistance furnace.
The main technical content of the utility model is as follows:
1) aiming at the problem of the loss of the box type resistance furnace energy efficiency test method, the box type resistance furnace energy efficiency test method (an empty furnace temperature rise test and a constant temperature test) is researched;
the energy efficiency testing method of the box type resistance furnace fully considers two main states of daily use and large energy consumption of the box type resistance furnace in a laboratory, namely a heating state and a constant temperature state. Respectively researching energy efficiency test methods of an empty furnace temperature rise test and a constant temperature test of the box type resistance furnace. The energy efficiency test conditions and the influence factors of the box type resistance furnace, the temperature test method in the temperature rise process, the measurement range and the technical requirements of the temperature measurement instrument and the measurement range and the technical requirements of the electric energy measurement instrument, which are required by the test, are determined through research. Determining a method for testing the empty furnace heating energy efficiency of the box-type resistance furnace and a method for testing the constant-temperature energy efficiency.
2) Aiming at the problem of the loss of the box type resistance furnace energy efficiency calculation method, the box type resistance furnace energy efficiency calculation method (empty furnace temperature rise energy efficiency and constant temperature energy efficiency) is researched;
the energy efficiency calculation of the box-type resistance furnace is divided into two parts, namely empty furnace heating energy efficiency calculation and constant temperature energy efficiency calculation. Influence factors under the empty furnace temperature rising state are determined through research, and the influence of the size of the furnace body, the air specific heat capacity and density during initial temperature rising, the temperature rising rate of the furnace body and the temperature rising starting and stopping temperature on the temperature rising energy efficiency is considered. Energy efficiency influence factors of the box-type resistance furnace in a constant temperature state are determined through research, and the influence of the size of the furnace body on constant temperature energy efficiency is considered. And obtaining a calculation formula of the empty heating energy efficiency and the constant temperature energy efficiency of the box type resistance furnace, and researching the reasonability of the calculation formula.
3) Energy efficiency testing device for trial-production box type resistance furnace
In the empty furnace temperature rise test process of the box type resistance furnace, the geometric center position of the box type resistance furnace needs to be measured, the highest working temperature of the box type resistance furnace is generally higher than 1000 ℃, the manufacture of a test support is particularly important, and accurate measurement is ensured, and meanwhile, the test device is not deformed and damaged within the range of 1600 ℃ of the highest using temperature of the box type resistance furnace.
The technical idea of utility model:
1) research box type resistance furnace energy efficiency test method (empty furnace temperature rise test and constant temperature test)
And (4) researching and determining environmental conditions and power supply conditions required by the energy efficiency test of the box-type resistance furnace, and used test instruments and technical requirements thereof.
The method comprises the steps of researching a testing method of the energy efficiency of the box type resistance furnace in an empty furnace heating process and a constant temperature process, analyzing influence factors in the testing process, determining research parameters, researching the relation between the temperature in the heating and constant temperature processes and the energy efficiency of the box type resistance furnace, researching temperature testing methods in the heating and constant temperature processes of the box type resistance furnace, and analyzing error sources in the testing process.
2) Research box type resistance furnace energy efficiency calculation method (empty furnace temperature rise energy efficiency, constant temperature energy efficiency)
And (3) testing the power consumption of the box type resistance furnace in the empty furnace heating process by using a power analyzer. The influence of the initial temperature of the empty furnace, the finishing temperature of the empty furnace, the specific heat capacity of air, the air density and the volume of the working area of the box-type resistance furnace on the energy efficiency of the empty furnace in the temperature rise test is researched. And deducing and determining an empty furnace heating energy efficiency calculation formula of the box type resistance furnace. And simultaneously obtaining the temperature rising rate of the empty furnace, and researching the relation between the temperature rising rate and the temperature rising energy efficiency of the empty furnace. The uncertainty of the test procedure is assessed.
And testing the power consumption of the box type resistance furnace per hour under a constant temperature state. The influence of the volume of the working area of the box-type resistance furnace on the energy efficiency under the constant temperature test is researched. And deducing a calculation formula for determining the constant-temperature energy efficiency of the box-type resistance furnace, and evaluating the uncertainty of the test process.
3) Energy efficiency testing device for trial-production box type resistance furnace
The energy efficiency testing device for the box-type resistance furnace is a high-temperature-resistant clamp required by temperature testing of a geometric central point of the box-type resistance furnace, and the clamp is used for arranging temperature measuring equipment, so that the testing position is accurate, and the temperature testing data is reliable. The temperature test is the key of the empty furnace heating efficiency of the box type resistance furnace, and the test accuracy is related to the result of the energy efficiency test. Therefore, the energy efficiency testing device of the box type resistance furnace plays an important role in the accuracy of the energy efficiency test.
A specific technical scheme is shown in fig. 5.
In order to overcome the defects of the prior art, the utility model provides a high-temperature furnace energy efficiency testing system and method, which achieve the purposes of energy conservation and consumption reduction and promote the development and progress of the industrial technology.
The utility model provides a high-temperature furnace energy efficiency test system, which comprises: the device comprises a box-type resistance furnace temperature testing device 1 and an energy efficiency testing device 2.
The box-type resistance furnace temperature testing device 1 comprises a box-type resistance furnace temperature testing support 3, a temperature testing thermocouple anode wire 4, a temperature testing thermocouple cathode wire 5, a thermocouple protective film 6, a compensating lead 7, a temperature data acquisition and recording device 8, a temperature measuring substance 15 and a first connecting lead 16.
The energy efficiency testing device 2 comprises energy consumption testing equipment 9, a control module 10 and a second connecting wire 11.
The box-type resistance furnace temperature testing device 1 is electrically connected with the energy efficiency testing device 2.
The box-type resistance furnace temperature testing support 3 is made of high-temperature-resistant insulating materials (such as ceramics), so that deformation is avoided under the extremely high-temperature testing condition of the box-type resistance furnace, and the temperature testing result is not influenced by introducing other metal materials in the temperature testing process. The device consists of a base 12 and at least 2 support rods 13, the support rods 13 with different sizes can be selected according to the size of a box type resistance furnace box body, the temperature test point is ensured to be at the geometric center position of the box type resistance furnace in the box type resistance furnace energy efficiency test process, and after the appropriate support rod 13 is selected according to the size of the box type resistance furnace box body, the support rod 13 is inserted into the base 12 for fixation.
The temperature testing thermocouple anode wire 4 is physically connected with the box type resistance furnace temperature testing support 3, one end of the temperature testing thermocouple anode wire 4 is connected with the base 12 of the box type resistance furnace temperature testing support 3, and the other end of the temperature testing thermocouple anode wire is led out of the furnace body through the box type resistance furnace door after passing through the fixing hole of the supporting rod 13. The temperature testing thermocouple anode wire 4 is made of common thermocouple anode materials (such as nickel-chromium), cathode fixing connecting holes 14 are formed every 1cm, the temperature testing thermocouple cathode wire 5 is convenient to connect, and the purpose of setting in such a way is to ensure that a temperature measuring point of the box-type resistance furnace is at the central position of a furnace body of the box-type resistance furnace, and a temperature measuring point is formed at the point. The cathode fixing connection hole 14 is formed by winding the temperature measuring thermocouple anode wire 4.
The temperature testing thermocouple anode wire 4 and the temperature testing thermocouple cathode wire 5 can be interchanged.
One end of the cathode wire 5 of the temperature testing thermocouple is connected with the cathode fixed connecting hole 14 of the anode wire 4 of the temperature testing thermocouple by adopting common thermocouple cathode materials, and the other end is led out of the furnace body through the furnace door of the box-type resistance furnace. The connection point of the cathode filament 5 and the anode filament 4 is a temperature test point. Common materials of the anode wire are nickel-chromium, platinum-rhodium 10 and the like, and the common materials of the cathode wire are nickel-silicon, pure platinum and the like.
The thermocouple protective film 6 is made of high-temperature-resistant insulating materials such as asbestos and the like and is used for protecting the temperature testing thermocouple anode wire 4 and the temperature testing thermocouple cathode wire 5 from passing through the furnace door of the box-type resistance furnace and playing a role in insulating the temperature testing thermocouple anode wire 4 and the temperature testing thermocouple cathode wire 5 from the furnace door of the box-type resistance furnace. The thermocouple protective film 6 is only arranged at the contact part of the furnace door of the tested box type resistance furnace and the temperature testing thermocouple anode wire 4 and the temperature testing thermocouple cathode wire 5.
The compensation lead 7 is used for connecting the temperature data acquisition and recording device 8 with the temperature test thermocouple anode wire 4 and the temperature test thermocouple cathode wire 5, the anode of the compensation lead 7 and the temperature test thermocouple anode wire 4 are made of the same material, and the cathode of the compensation lead 7 and the temperature test thermocouple cathode wire 5 are made of the same material. The compensation lead 7 is connected with the temperature testing thermocouple anode wire 4 and the temperature testing thermocouple cathode wire 5 through sockets, and the compensation lead 7 is connected with the temperature data acquisition and recording device 8 through a socket. Two ends of the temperature measuring substance 15 are connected with a first connecting lead 16; the first connecting wire 16 is electrically connected with the control module 10; the temperature measuring substance 15, the first connecting wire 16 and the control module 10 form a current loop;
the temperature data acquisition and recording device 8 acquires temperature data and calculates the temperature data; when the temperature rise energy efficiency of the box-type resistance furnace is tested, the corresponding temperature measuring substance 15 is selected according to the highest working temperature of the box-type resistance furnace, and when the temperature measuring substance 15 is melted and broken, a current loop formed by the temperature measuring substance 15, the first connecting lead 16 and the control module 10 is broken; in the constant-temperature energy efficiency testing process of the box-type resistance furnace, after the highest working temperature of the box-type resistance furnace is input, the temperature data acquisition and recording device 8 judges whether the acquired geometric center point temperature of the furnace body of the box-type resistance furnace reaches the range of +/-5 ℃ of the highest working temperature of the box-type resistance furnace, if so, the output temperature reaches a signal, then continuously judges whether the temperature in the box-type resistance furnace is within the corresponding working temperature range, namely +/-5 ℃ of the highest working temperature, and if so, outputs a signal that the temperature exceeds the range.
The temperature measuring substance 15 is made of metal or alloy material with high and stable melting point, such as pure gold, pure copper, brass H62, etc., the first connecting lead 16 is connected with the temperature measuring substance 15, and is physically connected with the box-type resistance furnace temperature testing bracket 3 through the fixing hole of the supporting rod 13, and is led out of the furnace body through the furnace door of the box-type resistance furnace. The compensating lead 7 is made of high-temperature resistant metal or alloy material, such as pure platinum, nickel silicon and the like, and the melting point of the material is higher than that of the temperature measuring substance 15; in the test process, the geometric center position of the temperature measuring substance 15 in the furnace body of the box type resistance furnace is ensured by adjusting the size of the supporting rod 13, the position of the box type resistance furnace temperature test bracket 3 and the length and the position of the compensating lead 15.
The energy efficiency testing device 2 comprises energy consumption testing equipment 9, a control module 10 and a second connecting wire 11.
The control module 10 is connected with the temperature data acquisition and recording device 8 and the energy consumption testing device 9 through software for communication, and the energy consumption testing device 9 is connected with the tested box type resistance furnace through a second connecting wire 11.
Based on the device, the utility model also provides a method for testing the energy efficiency of the box type resistance furnace for the laboratory,
the working state of the box-type furnace is as follows: based on the following test conditions:
during the energy efficiency test, the box furnace should be kept unloaded, and accord with following requirement:
1. the accessories which are connected with the box-type furnace in advance to ensure the normal work of the box-type furnace are installed and connected with the accessories required by the work of the box-type resistance furnace according to the installation requirements of the use specification;
2. the box-type furnace which is used for the first time or is not used for a long time needs to be dried according to the requirements of product specifications of a manufacturing plant;
3. the door of the box-type furnace should be kept in a completely closed state;
4. opening the door of the box-type furnace, and idling for at least 2h to ensure that the temperature in the box-type resistance furnace is consistent with the ambient temperature;
5. the box-type resistance furnace with the fan should be operated normally during the test.
6. The method is suitable for the energy efficiency test of the box type resistance furnace for the experiment at the working temperature of 100-1600 ℃ under natural atmosphere and protective atmosphere. In the energy efficiency test process of the box type resistance furnace for the protective atmosphere experiment, corresponding protective gas needs to be introduced.
Measurement of the working area: and measuring the geometric shape of the working area of the box-type furnace by using a steel tape according to 7.3.2 in JJF 1376-2012, wherein the result is the working area of the box-type furnace and is represented by V.
Measurement of the temperature of the geometric center point: the temperature probe of the temperature measuring device is arranged at the geometric central point of the box-type furnace, and the temperature is measured once every 3 min. The geometric center point is shown in GB/T28849-2012 at 6.3.1.3.
Box furnace test temperature: the box furnace test temperature was set to the maximum operating temperature.
An empty furnace temperature rise test: the box furnace should be fully dried before the test, and the power supply is connected under the cold condition of the empty furnace, and the temperature is increased to the highest working temperature at the maximum temperature change rate. And recording the starting temperature and the ending temperature of the geometric center point, the power consumption E1 in the temperature rise interval and the temperature rise time T.
Constant temperature test: setting the geometric central point temperature of the box-type furnace to reach the highest working temperature within +/-5 ℃, maintaining the thermal stability state for 2h, and recording the power consumption of 1h later, wherein the power consumption is represented by E2.
The energy efficiency testing method of the box type resistance furnace for the laboratory specifically comprises the following steps:
the empty furnace heating energy efficiency testing method of the box-type resistance furnace comprises the following steps:
1. measuring the volume of the working area of the box type resistance furnace, and expressing the volume by V; selecting a proper support rod 13 according to the size of the box body of the resistance furnace, then building a temperature test support 3, and determining the geometric center position of the box type resistance furnace: the temperature testing thermocouple cathode wire 5 is connected with a cathode fixing connecting hole 14 through a temperature testing thermocouple anode wire 4, and the cathode fixing connecting hole 14 is located at the geometric center of the box type resistance furnace box body. The connection point of the temperature testing thermocouple cathode wire 5 and the temperature testing thermocouple anode wire 4 is a temperature testing point; the first connecting wire 16 is connected with the control module 10;
2. a temperature measuring probe of the box type resistance furnace temperature testing device 1 is arranged at the geometric central point of the box type resistance furnace through a box type resistance furnace temperature testing bracket 3; the temperature measuring substance 15 is connected with a first connecting lead 16, and the temperature measuring substance 15 is positioned at the geometric center of the box body of the box type resistance furnace;
3: testing the temperature every 3 min; specifically, a proper support rod 13 is selected according to the size of the box body of the resistance furnace, then a temperature test support 3 is set up, one of the cathode thermocouple wires is connected through an anode thermocouple wire fixing hole, and the position of the fixing hole is in the geometric center of the box body of the resistance furnace. The connection point is a temperature test point. Introducing protective gas at a rated flow rate, stabilizing for 30min, and continuously introducing in the test process;
4. setting the test temperature of the box type resistance furnace as the highest working temperature;
5. before the test, the box-type resistance furnace is fully dried, and the temperature measured by the box-type resistance furnace temperature testing device 1 is increased to the highest working temperature at the maximum temperature change rate under the cold state of the empty furnace when the temperature reaches the set highest working temperature within +/-5 ℃.
After the test is started, the energy efficiency testing device 2 starts operating. Recording the initial temperature and the end temperature of the geometric central point and the electricity consumption E in the temperature rise interval1And a temperature rise time T.
6. Along with the rise of the temperature, when the temperature measuring substance 15 melts and breaks, a current loop formed by the temperature measuring substance 15, the first connecting lead 16 and the control module 10 is broken, the energy consumption testing equipment 9 stops recording the power consumption, and the initial temperature of the geometric center point, the ending temperature and the power consumption E in the temperature rise interval are obtained1(ii) a Meanwhile, the box-type resistance furnace is measured by a thermocoupleMeasured temperature t of geometric center position3(ii) a According to the inherent melting point temperature t of the temperature measuring substance 152The calculation is respectively shown in a formula (1) and a formula (2), and the temperature rise energy efficiency of the empty furnace is further calculated.
C1＝E1/[(t2-t1)·c·V·ρ] (1)
v＝(t2-t1)/T (2)
In the formula:
C1energy efficiency under the empty furnace temperature rise test is 1;
E1-the power consumption in joules (J) for the empty furnace temperature rise test; directly reading and measuring;
t1-the initial temperature of the empty furnace temperature rise test in degrees centigrade (deg.C); directly reading and measuring;
t2——t2the temperature is the inherent melting point temperature of a temperature measuring substance, and the unit is centigrade; directly reading and measuring;
c-specific heat capacity in joules per kilogram Celsius (J/(kg. DEG C)) of protective gas introduced at an initial temperature under standard atmospheric pressure;
v-working area of box furnace, unit is cubic meter (m)3)；
ρ -density of shielding gas at starting temperature in kilograms per cubic meter (kg/m) at standard atmospheric pressure3)；
v is the temperature change rate in the temperature rise process of the empty furnace, and the unit is centigrade per minute (DEG C/min);
t is the empty furnace temperature rise test time, and the unit is minute (min).
V is V1-V2, V1 box furnace body size, V2 box furnace door heat preservation layer size;
judging the reliability of the test process through the formula (3), comparing the actual measurement temperature t3 of the box body with the inherent melting point temperature t2 of the temperature measuring substance, and determining the reliability of the temperature rise test, wherein when the formula (3) is established, the test is reliable, and the data is available;
formula (3) (t3-10) t2 (t3+ 10).
At standard atmospheric pressureThe specific heat capacity of air at 23 ℃ is 1.004 kJ/(kg. DEG C), and the air density is 1.193kg/m3。
Secondly, an empty furnace constant-temperature energy efficiency testing method of the box-type resistance furnace comprises the following steps:
1. measuring the volume of the working area of the box type resistance furnace, and expressing the volume by V; selecting a proper support rod 13 according to the size of the box body of the resistance furnace, then building a temperature test support 3, and determining the geometric center position of the box type resistance furnace: the temperature testing thermocouple cathode wire (5) is connected with the temperature testing thermocouple anode wire (4) through a cathode fixing connecting hole (14), and the cathode fixing connecting hole (14) is located in the geometric center of the box type resistance furnace box body. The connection point of the temperature testing thermocouple cathode wire (5) and the temperature testing thermocouple anode wire (4) is a temperature testing point;
2. placing a temperature measuring probe of the box type resistance furnace temperature testing device 1 at the geometric central point of the box type resistance furnace through a box type resistance furnace temperature testing bracket (3), and testing the temperature once every 3 min;
3. introducing protective gas at a rated flow rate, stabilizing for 30min, and continuously introducing in the test process;
4. after the test is started, the temperature measured by the temperature measuring equipment reaches the set highest working temperature within +/-5 ℃, the thermal stable state is maintained for 2h, when the temperature output by the temperature data acquisition and recording device 8 reaches the signal, the energy efficiency testing device 2 starts to work, the power consumption of the energy efficiency testing device for 1h is recorded, and E is used2And (4) showing.
And after 5.1h, stopping recording by the energy consumption testing equipment 2, and further calculating to obtain the constant-temperature energy efficiency of the empty furnace. In the process, if a signal that the temperature output by the temperature data acquisition and recording device 8 exceeds the range is received, the energy consumption recording is stopped, and an abnormal alarm is given.
And (4) calculating the constant-temperature energy efficiency, wherein the constant-temperature energy efficiency is calculated in a formula (4).
C2＝E2/V (4)
In the formula:
C2energy efficiency of the constant temperature test in joules per cubic meter (J/m)3)；
E2Power consumption of the constant temperature testIn joules (J);
v-working area of box furnace, unit is cubic meter (m)3) (ii) a V is V1-V2, V1 is the volume of the furnace body of the box furnace, and V2 is the volume of the insulating layer of the furnace door of the box furnace.
The utility model has the beneficial effects that:
aiming at the problem that the energy efficiency test method and the calculation formula of the box type resistance furnace of the high energy consumption equipment in the laboratory are lacked, the energy efficiency test method of the box type resistance furnace with the highest temperature below 1600 ℃ is researched from the energy efficiency (variable temperature energy efficiency) test of the box type resistance furnace in the empty furnace heating state and the energy efficiency (constant temperature energy efficiency) test of the box type resistance furnace in the constant temperature state, and the energy efficiency test calculation method of the box type resistance furnace is deduced and summarized.
The utility model provides basis and reference for an energy efficiency test method of the box-type resistance furnace, indirectly promotes the technical upgrade and the energy efficiency control of equipment by identifying the energy consumption of the equipment, finally achieves the purposes of energy conservation and consumption reduction, promotes the development and progress of industrial technology, and also makes a contribution to creating a green laboratory.
The utility model abandons the traditional thermocouple and adopts a special thermocouple mode in the utility model, and the main purpose of the utility model is that the traditional thermocouple simultaneously processes the thermocouple anode wire and the thermocouple cathode wire in the thermocouple protective sleeve, and the thickness is relatively thick (about 3mm), when the thermocouple passes through the furnace door of the box-type resistance furnace, the furnace door of the box-type resistance furnace has a large gap, the temperature rise and the heat preservation of the box-type resistance furnace are influenced, the temperature test of the box-type resistance furnace is further influenced, the energy consumption of the box-type resistance furnace is increased, and the error of the energy efficiency test of the box-type resistance furnace is caused. In addition, the traditional thermocouple is difficult to fix at the geometric center position of the box-type resistance furnace, and the thermocouple position is influenced and deviated when the furnace door of the box-type resistance furnace is opened and closed. The thermocouple anode wire and the thermocouple cathode wire are adopted, and meanwhile, a thermocouple protective film is heated outside the thermocouple passing through the furnace door area of the box-type resistance furnace, so that the thickness of the thermocouple protective film passing through the furnace door is reduced to be less than 0.5mm, and the errors of temperature measurement and energy efficiency of the box-type resistance furnace are greatly reduced.
The main innovation points of the device of the utility model are as follows: temperature measuring support, temperature measuring thermocouple anode wire, cathode wire and thermocouple protective film
The utility model has the main innovation points that:
1) the energy efficiency test method of the box-type resistance furnace is researched.
A method for testing the empty furnace heating efficiency and constant temperature energy efficiency of the box-type resistance furnace is researched and determined. And analyzing influence factors of the empty furnace heating efficiency and the constant temperature energy efficiency of the box type resistance furnace.
2) And deducing an energy efficiency calculation method of the box type resistance furnace.
And researching and deducing calculation formulas for determining the temperature rise energy efficiency and constant temperature energy efficiency tests of the empty furnace of the box-type resistance furnace. And determining the relation of each influence factor of the empty heating energy efficiency and the constant temperature energy efficiency of the box type resistance furnace.
3) Design and preparation of box type resistance furnace energy efficiency testing device
The key of the box-type resistance furnace energy efficiency testing device is a box-type resistance furnace geometric center point temperature measuring clamp. The fixture is used for testing the temperature of the geometric central point of the box body of the box type resistance furnace in the temperature rising state of the empty furnace, and the fixture is important for ensuring no deformation and no influence on temperature measurement in the temperature rising process due to rapid temperature change and large temperature change amplitude in the temperature rising process. The test requirements of box-type resistance furnaces with different sizes are met.
Aiming at the research of the energy efficiency testing and calculating method of the box-type resistance furnace of the high-energy-consumption experimental equipment, the utility model promotes the product progress and development of related enterprises, promotes the upgrading and transformation development of industries and promotes the green and efficient development strategy.
The box-type resistance furnace has the function of introducing protective gas, and can play a role in protecting a sample and preventing oxidation during an experiment.
T is obtained by fusing the temperature measuring substance to short circuit the electric loop and stopping the energy consumption testing equipment at the first time2The benefits of this are:
a. the temperature measurement error is reduced, the temperature measurement process is easy to cause errors such as fluctuation, the response speed of the thermocouple is about 5s generally, and the temperature is lower than the actually measured temperature in the temperature rise process;
b. temperature measuring substances are set and selected at specific temperature points, such as 1100 ℃ and 1200 ℃, so that energy efficiency test comparison can be better performed on similar equipment (if the highest temperature calibrated by a box type resistance furnace is 1200 ℃, due to different algorithms, the maximum power of some box type resistance furnaces is directly increased to 1200 ℃, and the power is reduced and the temperature is slowly increased after the temperature is increased to 1100 ℃), and if the temperature measuring substances at 1100 ℃ are all selected, the temperature increasing energy efficiency can be more accurately judged;
c. it is not uncommon in the industry to use standard substances for temperature measurement.
Drawings
FIG. 1 is a schematic diagram of a high-temperature furnace energy efficiency test system according to the utility model.
Fig. 2 is a schematic diagram of the temperature testing bracket of the box-type resistance furnace.
Fig. 3 is an assembly diagram of the temperature testing bracket of the box-type resistance furnace.
FIG. 4 is a schematic diagram of a high-temperature furnace energy efficiency test system according to the utility model.
Fig. 5 is a study route chart of the present invention.
Wherein: a box-type resistance furnace temperature testing device 1; an energy efficiency testing device 2; a box-type resistance furnace temperature test bracket 3; testing the temperature of the thermocouple anode wire 4; testing the temperature of the thermocouple cathode filament 5; a cathode fixing attachment hole 14; a thermocouple protective film 6; a compensation wire 7; a temperature data acquisition and recording device 8; an energy consumption test device 9; a control module 10; a second connecting wire 11; a base 12; a strut 13; a cathode fixing attachment hole 14; a temperature measuring substance 15; first connecting wires 16.
Detailed Description
The present invention will be described in further detail with reference to the following specific examples and the accompanying drawings. The procedures, conditions, experimental methods and the like for carrying out the present invention are general knowledge and common general knowledge in the art except for the contents specifically mentioned below, and the present invention is not particularly limited.
High-energy-consumption laboratory equipment energy efficiency testing method box type resistance furnace
The terms and definitions of the box-type resistance furnace (box-type furnace for short) energy efficiency test are defined below, and the technical requirements, test conditions, test methods and the like of box-type furnace products are specified.
The utility model is suitable for the energy efficiency test of the box type furnace for the experiment of natural atmosphere and protective atmosphere with the working temperature of 100-1600 ℃.
The contents of the following documents constitute the indispensable clauses of the present invention by normative citation herein. Wherein, the date-annotated reference file only applies to the version corresponding to the date; dateless reference files, the latest version of which (including all the changes) are applicable to the present invention.
Box type resistance furnace for GB/T28849-2012 SX series experiments
GB/T30839.43-2015 industrial electric heating device energy consumption is divided into 43 parts: box type resistance furnace
JJF 1376-2012 box type resistance furnace calibration specification
A box type resistance furnace: the heating chamber is box-type and horizontal, and the intermittent resistance furnace is provided with a feeding furnace door and a discharging furnace door. [ GB/T30839.43-2015, 3.1]
Constant temperature energy efficiency parameter constanttempturetureenergyefficiency: and in the constant temperature process of the box-type furnace, the temperature of a unit working area is kept constant and the consumed energy is kept for 1 hour. The unit is J/m 3.
Temperature-varying energy efficiency parameter temperaturementenergyefficiency: in the temperature rise process of the box-type furnace, the ratio of the power consumption to the energy required by the change of the conversion temperature is obtained. The unit is 1.
Thermo-stable state thermolsteadystate: the box-type furnace reaches a thermodynamic state of equilibrium of heat absorption and heat release, and the temperature in the hearth fluctuates in a certain range in a thermal stable state. [ GB/T28849-2012, 3.11]
Working area workgarea: the box furnace can maintain the specified conditions within the specified tolerance range.
The technical requirements of the product are as follows: the performance requirements of the box furnace are in accordance with the relevant regulations of GB/T28849-2012.
Environmental conditions
The environmental test conditions of the box furnace should meet:
ambient temperature: 23 +/-2 ℃;
relative humidity: less than or equal to 85 percent;
air pressure: 80kPa to 106 kPa;
the ambient air flow rate should not be greater than 0.25 m/s.
The ambient temperature (the temperature of the space around the box furnace), namely the temperature measured from a test point 1m away from the vertical central line of the side wall of the box furnace and 1m away from the ground (the ambient temperature should not be influenced by the temperature of the air outlet of the box furnace).
Condition of power supply
The power supply test conditions of the box-type furnace meet the following conditions:
alternating-current voltage: 220V +/-6.6V or 380V +/-11.4V;
frequency: 50 Hz. + -. 0.5 Hz.
Testing instrument
Electric energy measuring instrument
Measurement range: the measurement ranges of the rated voltage and the rated current meet the test requirements;
maximum allowable error: not more than plus or minus 0.5%;
the application is as follows: and measuring the consumption of active electric energy of the box-type furnace.
Temperature measuring instrument
Measurement range: the temperature measurement range meets the test requirements;
the technical requirements of the temperature measuring equipment are as follows: the requirements of JJF 1376-;
the application is as follows: and measuring the temperature of the geometric center of the box-type furnace.
Stopwatch
Day difference: for + -1 s.
Steel tape
Accuracy grade: grade II and above;
the application is as follows: and measuring the geometric dimension of the working area of the box-type furnace.
The utility model provides a high-temperature furnace energy efficiency test system, which comprises: the device comprises a box-type resistance furnace temperature testing device 1 and an energy efficiency testing device 2.
The box-type resistance furnace temperature testing device 1 comprises a box-type resistance furnace temperature testing support 3, a temperature testing thermocouple anode wire 4, a temperature testing thermocouple cathode wire 5, a thermocouple protective film 6, a compensation lead 7 and a temperature data acquisition and recording device 8.
The energy efficiency testing device 2 comprises energy consumption testing equipment 9, a control module 10 and a second connecting wire 11.
The box-type resistance furnace temperature testing device 1 is electrically connected with the energy efficiency testing device 2.
The box-type resistance furnace temperature testing support 3 is made of high-temperature-resistant insulating materials (such as ceramics), so that deformation is avoided under the extremely high-temperature testing condition of the box-type resistance furnace, and the temperature testing result is not influenced by introducing other metal materials in the temperature testing process. The device consists of a base 12 and at least 2 support rods 13, the support rods 13 with different sizes can be selected according to the size of a box type resistance furnace box body, the temperature test point is ensured to be at the geometric center position of the box type resistance furnace in the box type resistance furnace energy efficiency test process, and after the appropriate support rod 13 is selected according to the size of the box type resistance furnace box body, the support rod 13 is inserted into the base 12 for fixation.
The temperature testing thermocouple anode wire 4 is physically connected with the box type resistance furnace temperature testing support 3, one end of the temperature testing thermocouple anode wire 4 is connected with the base 12 of the box type resistance furnace temperature testing support 3, and the other end of the temperature testing thermocouple anode wire is led out of the furnace body through the box type resistance furnace door after passing through the fixing hole of the supporting rod 13. The temperature testing thermocouple anode wire 4 is made of common thermocouple anode materials (such as nickel-chromium), cathode fixing connecting holes 14 are formed every 1cm, the temperature testing thermocouple cathode wire 5 is convenient to connect, and the purpose of setting in such a way is to ensure that a temperature measuring point of the box-type resistance furnace is at the central position of a furnace body of the box-type resistance furnace, and a temperature measuring point is formed at the point. The cathode fixing connection hole 14 is formed by winding the temperature measuring thermocouple anode wire 4.
The temperature testing thermocouple anode wire 4 and the temperature testing thermocouple cathode wire 5 can be interchanged.
The temperature testing thermocouple cathode wire 5 is made of common thermocouple cathode materials, one end of the temperature testing thermocouple cathode wire is connected with the cathode fixing connecting hole 14 of the temperature testing thermocouple anode wire 4, and the other end of the temperature testing thermocouple cathode wire is led out of the furnace body through the furnace door of the box-type resistance furnace. The connection point of the cathode filament 5 and the anode filament 4 is a temperature test point.
The thermocouple protective film 6 is made of high-temperature-resistant insulating materials such as asbestos and the like and is used for protecting the temperature testing thermocouple anode wire 4 and the temperature testing thermocouple cathode wire 5 from passing through the furnace door of the box-type resistance furnace and playing a role in insulating the temperature testing thermocouple anode wire 4 and the temperature testing thermocouple cathode wire 5 from the furnace door of the box-type resistance furnace. The thermocouple protective film 6 is only arranged at the contact part of the furnace door of the tested box type resistance furnace and the temperature testing thermocouple anode wire 4 and the temperature testing thermocouple cathode wire 5.
The compensation lead 7 is used for connecting the temperature data acquisition and recording device 8 with the temperature test thermocouple anode wire 4 and the temperature test thermocouple cathode wire 5, the anode of the compensation lead 7 and the temperature test thermocouple anode wire 4 are made of the same material, and the cathode of the compensation lead 7 and the temperature test thermocouple cathode wire 5 are made of the same material. The compensation lead 7 is connected with the temperature testing thermocouple anode wire 4 and the temperature testing thermocouple cathode wire 5 through sockets, and the compensation lead 7 is connected with the temperature data acquisition and recording device 8 through a socket.
The temperature data acquisition and recording device 8 acquires temperature data and calculates. When the temperature rise energy efficiency test of the box-type resistance furnace is carried out, after the highest working temperature of the box-type resistance furnace is input, the temperature data acquisition and recording device 8 judges whether the acquired geometric central point temperature of the furnace body of the box-type resistance furnace reaches the range of +/-5 ℃ of the highest working temperature of the box-type resistance furnace, and if the acquired geometric central point temperature of the furnace body of the box-type resistance furnace reaches the range of +/-5 ℃ of the highest working temperature of the box-type resistance furnace, a signal indicating that the temperature has reached is output. In the constant-temperature energy efficiency testing process of the box-type resistance furnace, after the highest working temperature of the box-type resistance furnace is input and the box-type resistance furnace reaches the range of +/-5 ℃ of the highest working temperature of the box-type resistance furnace, the output temperature reaches a signal, then whether the temperature in the box-type resistance furnace is within the corresponding working temperature range (+/-5 ℃ of the highest working temperature) or not is continuously judged, and if the temperature exceeds the range, a signal that the temperature exceeds the range is output.
The energy efficiency testing device 2 comprises energy consumption testing equipment 9, a control module 10 and a second connecting wire 11.
The control module 10 is connected with the temperature data acquisition and recording device 8 and the energy consumption testing device 9 through software for communication, and the energy consumption testing device 9 is connected with the tested box type resistance furnace through a second connecting wire 11.
Based on the device, the utility model also provides a method for testing the energy efficiency of the box type resistance furnace for the laboratory,
the working state of the box-type furnace is as follows: based on the following test conditions:
during the energy efficiency test, the box furnace should be kept unloaded, and accord with following requirement:
1. the accessories which are connected with the box-type furnace in advance to ensure the normal work of the box-type furnace are installed and connected with the accessories required by the work of the box-type resistance furnace according to the installation requirements of the use specification;
2. the box-type furnace which is used for the first time or is not used for a long time needs to be dried according to the requirements of product specifications of a manufacturing plant;
3. the door of the box-type furnace should be kept in a completely closed state;
4. opening the door of the box-type furnace, and idling for at least 2h to ensure that the temperature in the box-type resistance furnace is consistent with the ambient temperature;
5. the box-type resistance furnace with the fan should be operated normally during the test.
6. The method is suitable for the energy efficiency test of the box type resistance furnace for the experiment at the working temperature of 100-1600 ℃ under natural atmosphere and protective atmosphere. In the energy efficiency test process of the box type resistance furnace for the protective atmosphere experiment, corresponding protective gas needs to be introduced.
Measurement of the working area: and measuring the geometric shape of the working area of the box-type furnace by using a steel tape according to 7.3.2 in JJF 1376-2012, wherein the result is the working area of the box-type furnace and is represented by V.
Measurement of the temperature of the geometric center point: the temperature probe of the temperature measuring device is arranged at the geometric central point of the box-type furnace, and the temperature is measured once every 3 min. The geometric center point is shown in GB/T28849-2012 at 6.3.1.3.
Box furnace test temperature: the box furnace test temperature was set to the maximum operating temperature.
An empty furnace temperature rise test: the box furnace should be fully dried before the test, and the power supply is connected under the cold condition of the empty furnace, and the temperature is increased to the highest working temperature at the maximum temperature change rate. And recording the starting temperature and the ending temperature of the geometric center point, the power consumption E1 in the temperature rise interval and the temperature rise time T.
Constant temperature test: setting the geometric central point temperature of the box-type furnace to reach the highest working temperature within +/-5 ℃, maintaining the thermal stability state for 2h, and recording the power consumption of 1h later, wherein the power consumption is represented by E2.
The energy efficiency testing method of the box type resistance furnace for the laboratory specifically comprises the following steps:
the empty furnace heating energy efficiency testing method of the box-type resistance furnace comprises the following steps:
1. measuring the volume of the working area of the box type resistance furnace, and expressing the volume by V; selecting a proper support rod 13 according to the size of the box body of the resistance furnace, then building a temperature test support 3, and determining the geometric center position of the box type resistance furnace: the temperature testing thermocouple cathode wire 5 is connected with a cathode fixing connecting hole 14 through a temperature testing thermocouple anode wire 4, and the cathode fixing connecting hole 14 is located at the geometric center of the box type resistance furnace box body. The connection point of the temperature testing thermocouple cathode wire 5 and the temperature testing thermocouple anode wire 4 is a temperature testing point;
C1＝E1/[(t2-t1)·c·V·ρ] (1)
v＝(t2-t1)/T (2)
in the formula:
C1energy efficiency under the empty furnace temperature rise test is 1;
E1-the power consumption in joules (J) for the empty furnace temperature rise test;
t1-the initial temperature of the empty furnace temperature rise test in degrees centigrade (deg.C);
t2-the end temperature of the empty furnace temperature rise test in degrees centigrade (deg.c);
c-the specific heat capacity of air at the starting temperature at standard atmospheric pressure in joules per kilogram Celsius (J/(kg. DEG C));
v-working area of box furnace, unit is cubic meter (m)3)；
ρ -air density at starting temperature under standard atmospheric pressure in kilograms per cubic meter (kg/m)3)；
v is the temperature change rate in the temperature rise process of the empty furnace, and the unit is centigrade per minute (DEG C/min);
t is the empty furnace temperature rise test time, and the unit is minute (min).
The specific heat capacity of air at 23 ℃ under the standard atmospheric pressure is 1.004 kJ/(kg. DEG C.), and the air density is 1.193kg/m3。
V is V1-V2, V1 is the volume of the furnace body of the box furnace, and V2 is the volume of the insulating layer of the furnace door of the box furnace;
judging the reliability of the test process through the formula (3), comparing the actual measurement temperature t3 of the box body with the inherent melting point temperature t2 of the temperature measuring substance, and determining the reliability of the temperature rise test, wherein when the formula (3) is established, the test is reliable, and the data is available;
formula (3) (t3-10) t2 (t3+ 10).
Secondly, an empty furnace constant-temperature energy efficiency testing method of the box-type resistance furnace comprises the following steps:
1. measuring the volume of the working area of the box type resistance furnace, and expressing the volume by V; selecting a proper support rod 13 according to the size of the box body of the resistance furnace, then building a temperature test support 3, and determining the geometric center position of the box type resistance furnace: the temperature testing thermocouple cathode wire 5 is connected with a cathode fixing connecting hole 14 through a temperature testing thermocouple anode wire 4, and the cathode fixing connecting hole 14 is located at the geometric center of the box type resistance furnace box body. The connection point of the temperature testing thermocouple cathode wire 5 and the temperature testing thermocouple anode wire 4 is a temperature testing point;
2. placing a temperature measuring probe of the box type resistance furnace temperature testing device 1 at the geometric central point of the box type resistance furnace through a box type resistance furnace temperature testing bracket 3, and testing the temperature once every 3 min;
3. introducing protective gas at a rated flow rate, stabilizing for 30min, and continuously introducing in the test process;
4. after the test is started, the temperature measured by the temperature measuring equipment reaches the set highest working temperature within +/-5 ℃, the thermal stable state is maintained for 2h, when the temperature output by the temperature data acquisition and recording device 8 reaches the signal, the energy efficiency testing device 2 starts to work, the power consumption of the energy efficiency testing device for 1h is recorded, and E is used2And (4) showing.
And after 5.1h, stopping recording by the energy consumption testing equipment 2, and further calculating to obtain the constant-temperature energy efficiency of the empty furnace. In the process, if a signal that the temperature output by the temperature data acquisition and recording device 8 exceeds the range is received, the energy consumption recording is stopped, and an abnormal alarm is given.
And (4) calculating the constant-temperature energy efficiency, wherein the constant-temperature energy efficiency is calculated in a formula (4).
C2＝E2/V (4)
In the formula:
C2energy efficiency of the constant temperature test in joules per cubic meter (J/m)3)；
E2-the power consumption of the isothermal test in joules (J);
v-working area of box furnace, unit is cubic meter (m)3) (ii) a V is V1-V2, V1 is the volume of the furnace body of the box furnace, and V2 is the volume of the insulating layer of the furnace door of the box furnace.
Reference to the literature
1. The research on safety regulation and sustainable development of college laboratories [ J ] experimental technique and management, 2021,38(01): 276-.
2. National standards formulation and key technical index research of Maohui, Huangquingang, Zhang Yongwu, Xue Yuan, energy consumption of resistance furnace [ A ]. China standardization Association, structural reform and innovation of standardization assistance supply side-thirteenth China standardization forum statement of treatise [ C ]. China standardization Association, 2016:8.
3.Zhao J,Ma L,Zayed M E,et al.Industrial reheating furnaces:A review of energy efficiency assessments,waste heat recovery potentials,heating process characteristics and perspectives for steel industry[J].Process Safety and Environmental Protection,2021.
4. The State administration of quality supervision, inspection and quarantine of the people's republic of China, the Committee for Standard and management of China, GB/T30839.4-2015 part 4 of energy consumption of Industrial electric heating devices: resistance furnace [ S ]. beijing: chinese Standard Press 2015
5. The State administration of quality supervision, inspection and quarantine of the people' S republic of China, the Committee for the standardization and management of China, GB/T39476-2020 drug stability test Box energy efficiency test method [ S ]. Beijing: china standard press 2020.
The protection of the present invention is not limited to the above embodiments. Variations and advantages that may occur to those skilled in the art may be incorporated into the utility model without departing from the spirit and scope of the inventive concept, which is set forth in the following claims.
Claims (8)
1. The high-temperature furnace energy efficiency test system is characterized by comprising a box-type resistance furnace temperature test device (1) and an energy efficiency test device (2);
the box-type resistance furnace temperature testing device (1) comprises a box-type resistance furnace temperature testing support (3), a temperature testing thermocouple anode wire (4), a temperature testing thermocouple cathode wire (5), a thermocouple protective film (6), a compensating lead (7), a temperature data acquisition and recording device (8), a temperature measuring substance (15) and a first connecting lead (16); wherein,
the compensation lead (7) is used for connecting the temperature data acquisition and recording device (8) with the temperature test thermocouple anode wire (4) and the temperature test thermocouple cathode wire (5), and the anode of the compensation lead (7) and the temperature test thermocouple anode wire (4) are made of the same material; the cathode of the compensation lead (7) and the temperature testing thermocouple cathode filament (5) are made of the same material; the compensation lead (7) is connected with the temperature testing thermocouple anode wire (4) and the temperature testing thermocouple cathode wire (5) by adopting sockets; the compensation lead (7) is connected with the temperature data acquisition and recording device (8) by a socket; two ends of the temperature measuring substance (15) are connected with the first connecting lead (16); the first connecting lead (16) is electrically connected with the control module (10); the temperature measuring substance (15), the first connecting wire (16) and the control module (10) form a current loop;
the temperature data acquisition and recording device (8) acquires temperature data and calculates the temperature data;
the energy efficiency testing device (2) comprises energy consumption testing equipment (9), a control module (10) and a second connecting wire (11).
2. The high-temperature furnace energy efficiency test system according to claim 1, characterized in that the box-type resistance furnace temperature test device (1) is electrically connected with the energy efficiency test device (2).
3. The high-temperature furnace energy efficiency test system according to claim 1, characterized in that the box-type resistance furnace temperature test bracket (3) is made of high-temperature-resistant insulating material and consists of a base (12) and at least 2 support rods (13), and the support rods (13) are inserted into the base (12) for fixation.
4. The high-temperature furnace energy efficiency test system according to claim 1, characterized in that the temperature test thermocouple anode wire (4) is provided with cathode fixing connection holes (14) every 1cm, and the cathode fixing connection holes (14) are formed by winding the temperature test thermocouple anode wire (4);
the temperature testing thermocouple anode wire (4) is physically connected with the box type resistance furnace temperature testing support (3), one end of the temperature testing thermocouple anode wire (4) is connected with the base (12) of the box type resistance furnace temperature testing support (3), and the other end of the temperature testing thermocouple anode wire is led out of the furnace body through the box type resistance furnace door after passing through the fixing hole of the supporting rod (13).
5. The high-temperature furnace energy efficiency test system according to claim 1, characterized in that the temperature measuring substance (15) is made of metal or alloy material with high melting point and stability; the first connecting lead (16) is connected with the temperature measuring substance (15), is physically connected with the box type resistance furnace temperature testing bracket (3) through a fixing hole of the supporting rod (13), and is led out of the furnace body through the furnace door of the box type resistance furnace; the compensating lead (7) is made of high-temperature-resistant metal or alloy material, and the melting point of the material is higher than that of the temperature measuring substance (15); in the test process, the geometric center position of the temperature measuring substance (15) in the furnace body of the box-type resistance furnace is ensured by adjusting the size of the supporting rod (13), the position of the temperature test bracket (3) of the box-type resistance furnace and the length and the position of the compensating lead (7).
6. The high-temperature furnace energy efficiency test system according to claim 1, characterized in that one end of the temperature test thermocouple cathode wire (5) is connected with the cathode fixing connection hole (14) of the temperature test thermocouple anode wire (4), and the other end is led out of the furnace body through the furnace door of the box-type resistance furnace; the temperature testing thermocouple anode wire (4) and the temperature testing thermocouple cathode wire (5) can be interchanged.
7. The high-temperature furnace energy efficiency testing system of claim 1, characterized in that the thermocouple protective film (6) is made of high-temperature-resistant insulating material and is arranged at the contact position of the furnace door of the tested box type resistance furnace with the temperature testing thermocouple anode wire (4) and the temperature testing thermocouple cathode wire (5); the connection point of the temperature testing thermocouple cathode wire (5) and the temperature testing thermocouple anode wire (4) is a temperature testing point.
8. The high-temperature furnace energy efficiency test system according to claim 1, characterized in that the control module (10) is in software connection communication with the temperature data acquisition and recording device (8) and the energy consumption test device (9), and the energy consumption test device (9) is connected with the tested box type resistance furnace through a second connecting wire (11).
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2021
- 2021-05-19 CN CN202121071643.7U patent/CN216144531U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220329 |