A high temperature detection system and method for the ventilation volume of the middle package ventilation water outlet

Abstract

The present invention relates to a high-temperature detection system and method for the ventilation volume of a middle package air-permeable water port, the system comprises a frame, an outer heat-insulating cover, a lifting mechanism, a heating and temperature-measuring component, and a ventilation pipeline, the outer heat-insulating cover is at the upper end of the frame, the lifting mechanism and the heating and temperature-measuring component are in the frame, the heating and temperature-measuring component can move up and down between the outer heat-insulating cover and the frame under the drive of the lifting structure, the air-permeable water port of the middle package to be tested is in the outer heat-insulating cover, and gas is introduced into the air-permeable water port of the middle package to be tested through the ventilation pipeline. The beneficial effects of the present invention are: a high-temperature detection system and method for the ventilation volume of a middle package air-permeable water port, which fundamentally reflects the ventilation state of the product when it is used, and improves the success rate of the product research and development and production stages.

Description

Technical Field

[0001] The invention relates to a detection technology for refractory products, and in particular to a high-temperature detection system and method for the air flow rate of a middle package air permeable water outlet. Background Art

[0002] Continuous casting technology has been widely used around the world, but the problem of nozzle blockage in continuous casting seriously disrupts the continuous casting production process and causes the casting to end prematurely. In order to solve this problem, a permeable middle bag nozzle is used to blow argon into the molten steel through the permeable part of the nozzle brick, which effectively overcomes the tendency of nodule blockage and can also play a role in uniform molten steel temperature and promoting inclusion floating.

[0003] The permeable part of the tundish vent is used to blow argon into the molten steel through the diffuse or slit permeable part. The permeable part of the vent is made of refractory materials, and its volume change and phase change at high temperature affect the permeability to varying degrees.

[0004] The existing testing methods only test the air permeability of the middle package air outlet at room temperature, and lack testing methods at high temperature. The air permeability of the middle package air outlet at room temperature cannot represent its air permeability when used at high temperature. Summary of the invention

[0005] The present invention provides a system and method for detecting the high-temperature ventilation volume of a middle package ventilation water outlet, which fundamentally reflects the ventilation state of a product when it is used, and improves the success rate of product research and development and production stages.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A high-temperature detection system for the air flow rate of a middle package air permeable water outlet comprises a frame, an outer heat-insulating cover, a lifting platform, a heating and temperature-measuring component, and a ventilation pipeline. The outer heat-insulating cover is at the upper end of the frame, and the lifting platform and the heating and temperature-measuring component are inside the frame. The heating and temperature-measuring component can move up and down between the outer heat-insulating cover and the frame under the drive of the lifting platform. The air permeable water outlet of the middle package to be tested is inside the outer heat-insulating cover, and gas is introduced into the air permeable water outlet of the middle package to be tested through the ventilation pipeline.

[0008] The heating and temperature measuring assembly includes a heater, a high-temperature heat pipe, an insulation box, a detection thermocouple, and a heater thermocouple. The heater heats the high-temperature heat pipe at the lower part of the high-temperature heat pipe, and the heater thermocouple detects the temperature of the heated end of the high-temperature heat pipe. The heater and the heater thermocouple are in the insulation box, and the upper part of the high-temperature heat pipe and the detection thermocouple extend from the upper end of the insulation box.

[0009] The heater is an electromagnetic heater.

[0010] The heating actuator, the detection thermocouple and the heater thermocouple of the heater are connected to the control module through a gateway and a data bus.

[0011] Two regulating valves are installed on the ventilation pipeline, a pressure gauge, a thermometer, a pressure reducing valve and a flow meter are installed between the two regulating valves, and a manual regulating valve is installed on both sides of the two regulating valves.

[0012] The regulating valve, pressure gauge, thermometer, pressure reducing valve and flow meter are all connected to the control module via a gateway and a data bus.

[0013] The control module is externally connected to an industrial computer.

[0014] A method for detecting the ventilation volume of a middle bag ventilation outlet by using a high temperature ventilation volume detection system of a middle bag ventilation outlet comprises the following method:

[0015] 1) The high-temperature heat pipe is inserted into the vent of the middle package to be tested in the outer insulation cover by lifting the lifting platform; the high-temperature heat pipe is heated by an electromagnetic heater, and the temperature of the heating end of the high-temperature heat pipe is detected by the heater thermocouple, and the temperature of the upper part of the high-temperature heat pipe is detected by the detection thermocouple, which is also the temperature of the vent of the middle package to be tested;

[0016] 2) Introduce gas into the air-permeable water outlet of the middle package to be tested, and the control module collects gas flow and pressure data;

[0017] 3) Raise the temperature of the venting nozzle of the tundish to be tested to above 1200°C at a heating rate of 100-200°C / h;

[0018] 4) Set the gas pressure, and during the heating process, arbitrarily select several temperature values ​​and the highest and lowest temperature values ​​to detect the gas flow rate;

[0019] 5) Select different gas pressure values ​​and repeat the above step 4) at the same temperature value. Test each pressure value at least 3 times, convert it into the ventilation volume under standard conditions and take the average value, and then draw the temperature-ventilation curve under different pressures.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention provides a system and method for detecting the high-temperature ventilation volume of a middle package ventilation water outlet, which fundamentally reflects the ventilation state of a product when it is used, and improves the success rate of product research and development and production stages.

[0022] The present invention utilizes the high-temperature ventilation volume detection device of the ventilation water outlet to simulate the temperature and ventilation pressure of the actual use conditions of the product, can truly reflect the ventilation state of the product under the use conditions, and provide effective test data for product research and development and production. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a high-temperature detection system for the ventilation volume of a middle package air permeable water outlet in the present invention.

[0024] Figure 2 It is a schematic diagram of the heating and temperature measuring component in the present invention.

[0025] Figure 3 It is a schematic diagram of the ventilation pipeline of the present invention.

[0026] Figure 4 It is a schematic diagram of the control module of the present invention.

[0027] Figure 5 Schematic diagram of a power control module of the present invention.

[0028] Figure 6 It is a temperature rise curve of the venting nozzle of the middle package to be tested in an embodiment of the present invention.

[0029] Figure 7 4 is a temperature-air flow curve diagram under different pressures of an embodiment of the present invention.

[0030] In the figure: 1- heating and temperature measuring component, 101- lifting platform, 102- heating actuator, 103- electromagnetic heater, 104- heater thermocouple, 105- high temperature heat pipe, 106- insulation box, 107- detection thermocouple, 2- ventilation pipeline, 201- regulating valve A, 202- pressure reducing valve, 203- flow meter, 204- thermometer, 205- pressure gauge, 206- regulating valve B, 211- manual regulating valve A, 212- manual regulating valve B, 4- outer insulation cover, 5- air permeable water outlet of the middle package to be tested, 6- frame. DETAILED DESCRIPTION

[0031] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0032] See Figure 1-Figure 5 A high-temperature detection system for the ventilation volume of a middle package air permeable water port, comprising a frame 6, an outer heat preservation cover 4, a lifting platform 101, a heating and temperature measuring component 1, and a ventilation pipeline 2. The outer heat preservation cover 4 is at the upper end of the frame 6, the lifting platform 101 and the heating and temperature measuring component 1 are inside the frame 6, and the heating and temperature measuring component 1 can move up and down between the outer heat preservation cover 4 and the frame 6 under the drive of the lifting platform 101. The air permeable water port 5 of the middle package to be tested is inside the outer heat preservation cover 4, and gas is introduced into the air permeable water port 5 of the middle package to be tested through the ventilation pipeline 2. The hole above the outer heat preservation cover 4 is conducive to exhaust.

[0033] The heating and temperature measuring component 1 includes a heater, a high-temperature heat pipe 105, an insulation box 106, a detection thermocouple 107, and a heater thermocouple 104. The heater heats the high-temperature heat pipe 105 at the lower part of the high-temperature heat pipe 105. The heater thermocouple 104 detects the temperature of the heated end of the high-temperature heat pipe 105. The heater and the heater thermocouple 104 are in the insulation box 106. The upper part of the high-temperature heat pipe 105 and the detection thermocouple 107 extend from the upper end of the insulation box 106.

[0034] The heater is an electromagnetic heater 103 .

[0035] The heating actuator 102 of the heater, the detection thermocouple 107 and the heater thermocouple 104 are connected to the control module via a data bus.

[0036] Two regulating valves are installed on the ventilation pipeline 2, a pressure gauge 205, a thermometer 204, a pressure reducing valve 202, and a flow meter 203 are installed between the two regulating valves, and a manual regulating valve is installed on both sides of the two regulating valves.

[0037] The regulating valve, the pressure gauge 205, the thermometer 204, the pressure reducing valve 202 and the flow meter 204 are all connected to the control module via a data bus.

[0038] The control module is externally connected to an industrial computer.

[0039] A method for detecting the ventilation volume of a middle bag ventilation outlet by using a high temperature ventilation volume detection system of a middle bag ventilation outlet comprises the following method:

[0040] 1) The high-temperature heat pipe 105 is inserted into the vent 5 of the middle package to be tested in the outer heat-insulating cover 4 by lifting the lifting platform 101; the high-temperature heat pipe 105 is heated by the electromagnetic heater 103, and the temperature of the heating end of the high-temperature heat pipe 105 is detected by the heater thermocouple 104, and the temperature of the upper part of the high-temperature heat pipe 105 is detected by the detection thermocouple 107, which is also the temperature of the vent 5 of the middle package to be tested;

[0041] 2) Introduce gas into the air-permeable water port 5 of the middle package to be tested, and the control module collects gas flow and pressure data;

[0042] 3) The temperature of the vent 5 of the tested tundish is raised to above 1200°C at a heating rate of 100-200°C / h; a temperature heating curve is formulated according to the above rule;

[0043] 4) Set the gas pressure, and during the heating process, arbitrarily select several temperature values ​​and the highest and lowest temperature values ​​to detect the gas flow rate;

[0044] 5) Select different gas pressure values ​​and repeat the above step 4) at the same temperature value. Test each pressure value at least 3 times, convert it into the ventilation volume under standard conditions and take the average value, and then draw the temperature-ventilation curve under different pressures.

[0045] See Figure 4 The present invention uses an industrial computer to interact with a PLC controller, the PLC controller is connected to a gateway via a data bus, and the gateway is connected to an actuator or a detection mechanism. The system includes a control module, a power supply module, a heating and temperature measurement component, and a gas detection module.

[0046] The heating and temperature measuring component 1 is responsible for heating the product to be tested, the gas detection module detects the ventilation volume of the test product at a specified temperature, and the outer insulation cover 4 keeps the product warm.

[0047] Each execution gateway is connected to the control module through the data bus, where the control module is a Simatic S7-1200 series PLC and the data bus is a 485 bus. The control module transmits data with each execution gateway through the data bus to receive information and issue instructions to control each component. An external industrial computer sends control quality and parameter data to the control module and outputs the results on the external industrial computer.

[0048] The heating and temperature measuring component can be raised and lowered by the lifting platform 101 to control the high-temperature heat pipe to be inserted into the product to be tested. The upper part of the high-temperature heat pipe 105 is inserted into the product as the cold end, and the lower part is heated by the electromagnetic heater 103 as the hot end. The high-temperature heat pipe 105 can quickly transfer heat from the hot end to the cold end. The hot end temperature of the high-temperature heat pipe 105 is detected by the heater thermocouple 104, and the cold end temperature of the high-temperature heat pipe 105 is detected by the detection thermocouple 107. This temperature is also the temperature of the product being tested. The control module controls the output power of the heater by comparing the temperature heating curve according to the temperature difference between the detection thermocouple 107 and the heater thermocouple 104, and at the same time controls each component to maintain a safe temperature.

[0049] The gas detection module controls the opening and closing of the input gas through the regulating valve A201, controls the pressure of the input gas through the pressure reducing valve 202, controls the opening and closing of the gas entering the product through the regulating valve B206, and measures the flow rate, pressure and temperature of the product entering through the flow meter 203, the thermometer 204 and the pressure gauge 205, all of which are automatically controlled and data collected by the control module. In addition, manual regulating valve A211 and manual regulating valve B212 are provided. These two manual regulating valves are not controlled by the control module and can manually control the input gas and the gas entering the detection product respectively.

[0050] Power supply module such as Figure 5As shown, the input 380V directly supplies the heating actuator and the isolation transformer, and supplies power to the execution gateway and control module of each part through the power control module.

[0051] Embodiment 1:

[0052] Place the middle bag air-permeable water outlet 5 to be tested on the testing system, install the testing tube and the outer heat-insulating cover 4. Connect the external air source, and open the manual regulating valve A211 and the manual regulating valve B212.

[0053] The temperature was raised to 1500°C at a heating rate of 200°C / h for testing, and a temperature rise curve was drawn based on this. Figure 6 . Select three pressure values ​​of 0.05MPa, 0.1MPa, and 0.2MPa for ventilation detection. Measure 3 times at each pressure and temperature, calculate the ventilation under standard conditions, and take the average of 3 times. Draw the temperature-ventilation curve under different pressures, such as Figure 7 As shown, the changes in temperature and ventilation volume under different supply air pressures are shown.

Claims

1. A method for detecting the ventilation volume of a middle bag ventilation outlet, characterized in that: The method is realized by a high-temperature detection system for the ventilation amount of a middle package air permeable water port, the system comprising a frame, an outer heat preservation cover, a lifting platform, a heating and temperature measuring component, and a ventilation pipeline, the outer heat preservation cover is at the upper end of the frame, the lifting platform and the heating and temperature measuring component are inside the frame, the heating and temperature measuring component can move up and down between the outer heat preservation cover and the frame under the drive of the lifting platform, the air permeable water port of the middle package to be tested is inside the outer heat preservation cover, and gas is introduced into the air permeable water port of the middle package to be tested through the ventilation pipeline; The heating and temperature measuring assembly includes a heater, a high-temperature heat pipe, an insulation box, a detection thermocouple, and a heater thermocouple. The heater heats the high-temperature heat pipe at the lower part of the high-temperature heat pipe, and the heater thermocouple detects the temperature of the heated end of the high-temperature heat pipe. The heater and the heater thermocouple are in the insulation box, and the upper part of the high-temperature heat pipe and the detection thermocouple extend from the upper end of the insulation box. Methods for testing the ventilation volume of the middle package air outlet include: 1) Insert the high-temperature heat pipe into the vent of the middle package to be tested in the outer insulation cover by lifting the lifting platform; the high-temperature heat pipe is heated by an electromagnetic heater, and the temperature of the heating end of the high-temperature heat pipe is detected by the heater thermocouple, and the temperature of the upper part of the high-temperature heat pipe is detected by the detection thermocouple, which is also the temperature of the vent of the middle package to be tested; 2) Introduce gas into the air-permeable water outlet of the middle package to be tested, and the control module collects gas flow and pressure data; 3) Raise the temperature of the venting nozzle of the tested tundish to above 1200°C at a heating rate of 100-200°C / h; 4) Set the gas pressure, and during the heating process, arbitrarily select several temperature values ​​and the highest and lowest temperature values ​​to detect the gas flow rate; 5) Select different gas pressure values ​​and repeat the above step 4 at the same temperature value. Test each pressure value at least 3 times, convert it into the ventilation volume under standard conditions and take the average value, and then draw the temperature-ventilation curve under different pressures.

2. A method for detecting the ventilation volume of the middle bag ventilation outlet according to claim 1, characterized in that: The heater is an electromagnetic heater.

3. A method for detecting the ventilation volume of the middle bag ventilation outlet according to claim 1, characterized in that: The heating actuator, the detection thermocouple and the heater thermocouple of the heater are connected to the control module through a gateway and a data bus.

4. A method for detecting the ventilation volume of the middle bag ventilation outlet according to claim 1, characterized in that: Two regulating valves are installed on the ventilation pipeline, a pressure gauge, a thermometer, a pressure reducing valve and a flow meter are installed between the two regulating valves, and a manual regulating valve is installed on both sides of the two regulating valves.

5. A method for detecting the ventilation volume of the middle bag ventilation outlet according to claim 4, characterized in that: The regulating valve, pressure gauge, thermometer, pressure reducing valve and flow meter are all connected to the control module via a gateway and a data bus.

6. A method for detecting the ventilation volume of a middle bag ventilation outlet according to claim 3 or 5, characterized in that: The control module is externally connected to an industrial computer.

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