CN218098967U

CN218098967U - Measuring device of heat conductivity coefficient heat flow meter

Info

Publication number: CN218098967U
Application number: CN202221936911.1U
Authority: CN
Inventors: 赵静
Original assignee: Shenyang Hexing Automation Equipment Co ltd
Current assignee: Shenyang Hexing Automation Equipment Co ltd
Priority date: 2022-07-26
Filing date: 2022-07-26
Publication date: 2022-12-20
Anticipated expiration: 2032-07-26

Abstract

The utility model discloses a measuring device of heat conductivity coefficient heat flow meter relates to the technical field of measuring device, including measurement unit, cooling unit, the control unit and heat flow meter unit, the measurement unit includes the measurement heater, the left and right both ends of measurement heater are equipped with left measurement panel and right measurement panel respectively, the measurement heater includes measurement lining film and measurement heater strip, the cooling unit includes cooling plate, cooling heater and cooler, adopts the heat flow of heat flow meter test system, has improved the detection efficiency of device, can shorten check-out time, reduce the system consumption, the energy saving; the experimental result shows that the heat flow meter sheet is used for measuring the heat flow passing through the test piece, the precision and the repeatability of the heat flow meter sheet are obviously improved compared with the measurement of the original power sensor, the heat flow meter sheet has wider application, and the heat flow meter sheet can also be applied to measuring devices for equivalent weight of wall materials, steady-state heat transfer properties and the like.

Description

Measuring device of heat conductivity coefficient heat flow meter

Technical Field

The utility model relates to a survey device technical field, concretely relates to survey device of heat conductivity coefficient heat flow meter.

Background

The heat conductivity coefficient heat flow meter testing device of the heat insulating material is designed and manufactured according to the stipulation in the national standard GB/T10295-2008 ' measuring heat flow meter method for the steady-state heat resistance and relevant characteristics of the heat insulating material ' of the people's republic of China; the heat conductivity coefficient (or thermal resistance) is one of the main thermal properties of the heat-insulating material, and is a main mark for identifying the heat-insulating property quality of the material. In recent years, with the coming of building energy conservation laws and regulations, china pays more and more attention to building energy conservation. In order to save energy, many industrial fields and building fields are researching and producing heat-resistant heat-insulating materials. The heat conductivity coefficient is an important parameter for measuring the heat conductivity and heat preservation performance of a heat-resistant material, the accuracy of a heat conductivity coefficient measurement result is closely related to each unit designed by a tester, the design and manufacture of a heating unit in the heat conductivity coefficient tester are particularly important, the heat flow test of the heat conductivity coefficient of the heat-insulating material adopted in the prior art is used for controlling and designing the heat flow of a power sensor measurement system, the power sensor is connected to collect and measure the heating power of heating, the heat flow of a test piece in a steady state is calculated, the heat conductivity coefficient is calculated according to the thickness and the area of the test piece, the heating power is partially lost at the joint of the test piece and a fixed plate (sealed well and has heat loss), the power of an electric heater of the measurement unit is measured by the power sensor, the heat conductivity coefficient of the heat-insulating material is calculated, the problem is that the test power is larger than the actual power, the reason is the heating power of the heat-insulating material (test piece), a part of energy is consumed in a gap between the test piece and the fixed plate, the inaccurate protection, the temperature difference of the metering plate, the measured data are needed to be corrected, the experimental data are different, the experimental data are caused by the experimental data, the experimental operation mode, the experimental data are not only the complicated test and the test accuracy is difficult to guarantee the production and the high-production and the test precision is difficult to guarantee.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a survey device of heat conductivity coefficient heat flow meter to solve the heat flow test of the heat insulating material heat conductivity coefficient who adopts among the prior art that proposes in the above-mentioned background art, lead to the experimental data inaccuracy, the repeatability is poor, this kind of mode of observing and controling not only operates complicatedly, test time is long, in order to guarantee the reliability of production moreover, various production machinery require the precision height at the design, unnecessary power consumption causes the waste of electric energy, especially hardly guarantee the problem of the accuracy of test data.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a survey device of thermal conductivity heat flow meter, includes measurement unit, cooling unit, the control unit and heat flow meter unit, the measurement unit is including the measurement heater, both ends are equipped with left measurement panel and right measurement panel respectively about the measurement heater, the measurement heater is including measurement lining membrane and measurement heater strip, the cooling unit includes chill plate, cooling heater and cooler, the control unit includes man-machine interaction module, communication module, temperature acquisition module, input module, thermal current signal amplification module, thermal current piece signal acquisition module, output module, voltage regulation module, expansion module and control module, the heat flow meter unit includes hot face temperature sensor, heat flow meter piece and cold face temperature sensor, the measurement unit the control of cooling unit temperature reaches heat flow meter unit heat acquisition by the control unit accomplishes.

Preferably, control module and human-computer interaction module both way junction, human-computer interaction module passes through control module with communication module reaches input module connects, control module passes through expansion module with output module connects, temperature acquisition module with communication module connects, heat flow piece signal acquisition module passes through heat flow signal amplification module with input module connects, the pressure regulating module with output module both way junction.

Preferably, the temperature acquisition module and the communication module receive data transmitted by the temperature sensor and process and convert the data into a temperature value.

Preferably, the heat flow signal amplification module converts the test piece heat energy W · M2 collected by the heat flow sheet signal collection module into a voltage V signal, and the input module converts the voltage V signal into a digital signal D and sends the digital signal D to the control module.

Preferably, the output signal of the output module is connected with the voltage regulating module, and the output module performs closed-loop PID regulation on the output of each voltage regulating module of the voltage regulating module.

Preferably, the control module is composed of a programmable controller and each electrical component, and the output of the programmable controller controls the operation of each electrical component.

Preferably, the human-computer interaction module is communicated with the control module through an RS232 port.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses analog signal acquisition card and power sensor have been cancelled to the system, measure the heat flow through the test piece through using heat flow meter piece and heat flow signal amplifier. When heat flow passes through the heat flow sensor, a temperature gradient is generated on a thermal resistance layer of the heat flow meter sheet, the heat flow of a test piece can be accurately measured according to the Fourier law, the heat conductivity coefficient of the heat insulating material is automatically calculated according to the area of the test piece of the heat insulating material, the response time of equipment is fast, the influence of the external environment temperature is small, the measurement precision is high, the repeatability is good, the heat flow of a system is tested by adopting the heat flow meter, the detection efficiency of the device is improved, the detection time can be shortened, the power consumption of the system is reduced, and energy is saved; the experimental result shows that the heat flow meter sheet is used for measuring the heat flow passing through the test piece, the precision and the repeatability of the heat flow meter sheet are obviously improved compared with the measurement of the original power sensor, the heat flow meter sheet has wider application, and the heat flow meter sheet can also be applied to measuring devices for equivalent weight of wall materials, steady-state heat transfer properties and the like.

Drawings

FIG. 1 is a schematic view of the main structure of the present invention;

FIG. 2 is a schematic view of the structure of the main metering unit of the present invention;

FIG. 3 is a schematic view of the metering heater of the present invention;

FIG. 4 is a schematic view of the cooling unit of the present invention;

fig. 5 is a schematic structural diagram of the control unit of the present invention;

fig. 6 is a schematic diagram of the structure of the heat flow meter unit of the present invention.

In the figure: 1-metering unit, 101-metering heater, 111-metering lining film, 112-metering heating wire, 102-left metering panel, 103-right metering panel, 2-insulating material test piece, 3-cooling unit, 301-cooling plate, 302-cooling heater, 303-cooler, 4-control unit, 401-man-machine interaction module, 402-communication module, 403-temperature acquisition module, 404-input module, 405-heat flow signal amplification module, 406-heat flow sheet signal acquisition module, 407-output module, 408-pressure regulation module, 409-expansion module, 4010-control module, 5-heat flow meter unit, 501-hot surface temperature sensor, 502-heat flow meter sheet and 503-cold surface temperature sensor.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, the utility model provides a measuring device of heat conductivity heat flow meter, including metering unit 1, cooling unit 3, the control unit 4 and heat flow meter unit 5, the metering unit 1 includes metering heater 101, the left and right both ends of metering heater 101 are equipped with left metering panel 102 and right metering panel 103 respectively, metering heater 101 includes metering lining film 111 and metering heater wire 112, constitutes metering heater 101 by metering lining film 111 and metering heater wire 112, cooling unit 3 includes cooling plate 301, cooling heater 302 and cooler 303, the control unit 4 includes man-machine interaction module 401, communication module 402, temperature acquisition module 403, input module 404, heat flow signal amplification module 405, heat flow sheet signal acquisition module 406, output module 407, pressure regulating module 408, expansion module 409 and control module 0, the heat flow meter unit 5 comprises a hot surface temperature sensor 501, a heat flow meter piece 502 and a cold surface temperature sensor 503, the hot surface temperature sensor 501 and the cold surface temperature sensor 503 form a DS18B20 which is selected, the DS18B20 is a common digital temperature sensor, the output of the digital temperature sensor is a digital signal, the heat flow meter piece 502 is formed by pasting metal foils on two surfaces of an alloy thin plate, a heat flow measuring head body is used as a differential thermocouple, the selected heat flow measuring head is 23.2 w.m 2/mV (less than or equal to 100 w.m 2), the metering unit 1, the control of the temperature of the cooling unit 3 and the heat collection of the heat flow meter unit 5 are completed by the control unit 4.

When in use, the hot surface temperature sensor 501 is arranged on the inner sides of the left measuring panel 102 and the right measuring panel 103 in the measuring unit 1, and is fixed by screws after being pressed with the measuring heater 102, and one surface of the heat flow meter sheet 502 is adhered to the right measuring panel 103 of the measuring heater 101; the other side of the heat flow meter piece 502 is tightly attached to the heat insulation material test piece 2, the heat insulation material test piece 2 is clamped between the right metering panel 103 and the cooling plate 301, the cold side temperature sensor 503 of the heat flow meter unit 5 is installed on the inner side of the cooling plate 301 of the cooling unit 3, the cooling heater 302 and the cooler 303 provide low temperature for the cooling plate 301, the heat flow sheet signal acquisition module 406 acquires W (23.2 W.m 2/mV), the area of the tested heat insulation material test piece 2 is S (M2), the tested heat insulation material test piece 2 is amplified, filtered and converted by the heat flow signal amplification module 405 and is converted into a digital signal corresponding to the analog signal, and the input module 404 performs A/D conversion and sends the digital signal to the control module 4010. The method comprises the following steps of processing data, further obtaining a value of equivalent heat conductivity coefficient of a wall material according to the relation between the area, the temperature and the voltage of a test piece, enabling a heat flow signal amplification module 405 to adopt an SG4014 module, enabling the SG4014 module to adopt the latest isolation technology to work in a low-power consumption and accurate wide-range operation environment, enabling the specification input voltage to be 0-10mV and the output voltage to be 0-10V, not easily influenced by environmental parameters, being high in anti-interference capability and ensuring the accuracy of testing, and solving the problem that the detection result is inaccurate due to the influence of factors such as the environmental temperature and the installation of the test piece in the detection process of the existing product by adopting the heat of a heat flow meter piece 502 measuring system; the control system adopts a man-machine interaction module (a computer and powerful master software) 401 and a control module (a programmable controller and various electrical appliance parts) 4010, intelligently controls the whole detection process, quickly and accurately measures, has stable performance, automatically calculates the detection result, and controls the state of the computer to complete interface display, data processing, detection report output, report record and historical detection data.

The control module 4010 is connected with a man-machine interaction module 401 in a bidirectional mode, the man-machine interaction module 401 is connected with the communication module 402 and the input module 404 through the control module 4010, the control module 4010 is connected with the output module 407 through the expansion module 409, the temperature acquisition module 403 is connected with the communication module 402, the heat flow sheet signal acquisition module 406 is connected with the input module 404 through the heat flow signal amplification module 405, and the pressure regulating module 408 is connected with the output module 407 in a bidirectional mode.

The temperature acquisition module 403 and the communication module 402 receive data transmitted by the temperature sensor and process and convert the data into a temperature value, the communication module 402 selects loose AFPX-COM4, the AFPX-COM4 has RS485 and RS232 bidirectional channels, and the temperature acquisition module 403 selects an LTM8663 acquisition module. The LTM8663 temperature measurement system consists of 8 channels, each of which can receive up to 64 sensors. The sensor and the processor adopt a 1-wire bus connection mode.

The heat flow signal amplification module 405 converts the test piece heat energy W · M2 collected by the heat flow sheet signal collection module 406 into a voltage V signal, the input module 404 converts the voltage V signal into a digital signal D and sends the digital signal D to the control module 4010, and the input module 404 adopts the loose AFPX-a21.

The output signal of the output module 407 is connected to the voltage regulation module 408, the output module 407 performs closed-loop PID regulation on the output of each voltage regulation module of the voltage regulation module 408, the output module 408 adopts loose FP0-a04V, FP0-a04V has 4 channels, the voltage regulation module 408 adopts an intelligent voltage regulation module, the input of the control end of the intelligent voltage regulation module is direct current 0-10V, and the output is direct current DC0-50V.

The control module 4010 is composed of a programmable controller and electrical components, the output of the programmable controller controls the operation of the electrical components, and the control module 4010 is loose FP-X14T. The FP-X14T programming is simple and convenient, the function is strong, the adaptability is strong, the anti-interference ability is strong, the maintenance is convenient, and the cost performance is high.

The human-computer interaction module 401 communicates with the control module 4010 through an RS232 port, and a worker transmits data with equipment through the human-computer interaction module 401.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A measuring device of a heat conductivity coefficient heat flow meter is characterized in that: including metering unit (1), cooling unit (3), control unit (4) and heat flow meter unit (5), metering unit (1) is including measurement heater (101), both ends are equipped with left measurement panel (102) and right measurement panel (103) respectively about measurement heater (101), measurement heater (101) including measurement lining membrane (111) and measurement heater strip (112), cooling unit (3) are including cooling plate (301), cooling heater (302) and cooler (303), control unit (4) are including man-machine interaction module (401), communication module (402), temperature acquisition module (403), input module (404), heat flow signal amplification module (405), heat flow piece signal acquisition module (406), output module (407), output module (408), expansion module (4010) and control module (4010), heat flow meter unit (5) are including heat face temperature sensor (501), heat flow meter piece (502) and cold face temperature sensor (503), metering unit (1), cooling unit (3) temperature reaches heat flow meter unit (409) is gathered by heat flow meter unit (5) pressure regulating unit (409) is accomplished.

2. A device according to claim 1 for measuring the thermal conductivity of a heat flow meter, comprising: control module (4010) and human-computer interaction module (401) both way junction, human-computer interaction module (401) passes through control module (4010) with communication module (402) reaches input module connects (404), control module (4010) pass through expansion module (409) with output module (407) is connected, temperature acquisition module (403) with communication module (402) is connected, heat current piece signal acquisition module (406) passes through heat current signal amplification module (405) with input module (404) is connected, pressure regulating module (408) with output module (407) both way junction.

3. A device according to claim 1 for measuring the thermal conductivity of a heat flow meter, comprising: the temperature acquisition module (403) and the communication module (402) receive data transmitted by the temperature sensor and process and convert the data into a temperature value.

4. A thermal conductivity flow meter measuring device according to claim 1, wherein: the heat flow signal amplification module (405) converts the test piece heat energy (W.M 2) collected by the heat flow sheet signal collection module (406) into a voltage (V) signal, and the input module (404) converts the voltage (V) signal into a digital signal D and sends the digital signal D to the control module (4010).

5. A thermal conductivity flow meter measuring device according to claim 1, wherein: the output signal of the output module (407) is connected with the pressure regulating module (408), and the output module (407) performs closed-loop PID regulation on the output of each pressure regulating module of the pressure regulating module (408).

6. A thermal conductivity flow meter measuring device according to claim 1, wherein: the control module (4010) is composed of a programmable controller and each electrical appliance component, and the output of the programmable controller controls the operation of each electrical appliance component.

7. A thermal conductivity flow meter measuring device according to claim 1, wherein: the man-machine interaction module (401) is communicated with the control module (4010) through an RS232 port.