There is no limit to creativity, and the instrument is invented. Today we introduce a national invention patent for authorization, a heat meter flow sensor durability test equipment and method. The patent was applied by the Shanxi Institute of Metrology and was approved on May 10, 2017.
Description
The invention relates to the technical field of heat meter durability test, in particular to a heat meter flow sensor durability test device and method.
Background of the invention
Before the type test or the factory, the heat meter needs to verify the reliability and durability of the heat meter by simulating its actual operating conditions and using accelerated wear. The heat meter flow sensor durability test equipment is the equipment for checking the durability of the heat meter flow sensor, and is one of the supporting equipment for the heat meter production and inspection mechanism verification.
The domestic heat meter inspection mechanism and the flow sensor durability test equipment provided by the manufacturer will have a test flow reduction phenomenon due to the loss of the pump performance after long-term operation, which needs manual adjustment, must be guarded by a person, and has high running cost. Manual adjustment control has low precision and unstable performance. In addition, a single water supply circulation method is adopted, and the power consumption is high when the test is performed under the small and medium flow points.
Summary of the invention
The invention provides a heat meter flow sensor durability test device and method capable of reducing operating cost, and the device is used for the durability test of the heat meter flow sensor, and the operation is simple and reliable.
The figure shows the structure diagram of the heat meter flow sensor durability test equipment according to the present invention.
A heat meter flow sensor durability test device, comprising: a water storage device for storing circulating water; a water supply device connected to the water outlet of the water storage device; a flow for controlling the durability of the heat meter flow sensor for water supply circulation power Size; connected to the flow regulating device connected to the inlet and outlet of the water storage device; used to control the valve opening degree, adjust the test flow rate; the frequency conversion control device is used to control the flow stability of the water supply device speed and the heat meter flow sensor durability test; The test table clamping device for fixing the test table; the flow display device connected to the flow regulating device; the computer automatic control system, by reading the collected flow information fed back by the flow display device, and real-time comparison with the preset flow rate, automatically adjusting The frequency conversion control device and the flow rate adjusting device have an adjustment precision greater than the flow rate adjusting device; in use, the tested table and the flow rate display device are sequentially connected in series between the water supply device and the flow regulating device.
A heat meter flow sensor durability test method based on the heat meter flow sensor durability test device according to the present invention, comprising the steps of: separately adjusting a frequency conversion control device and a flow regulating device after completion of a previous test phase; a computer automatic control system Reading the traffic data of the traffic display device; if the traffic value meets the traffic requirement of the next test phase, enter the next test phase; the computer automatic control system detects whether the traffic of the current test phase reaches the preset traffic at a preset time interval, if Satisfy the preset flow rate and maintain the status quo; if not, control the frequency conversion control device to adjust the flow rate so that the actual flow rate tends to the preset flow rate.
The flow dynamic adjustment of the device of the present invention is automatically implemented by the operating software of the computer automatic control system. The durability test period of the heat meter is long, and different flow points need to be switched during the test. After the long-term operation of the water supply device with the water pump as the main component in the high-temperature circulating water, the performance loss will always occur, resulting in the test flow. Unstable. The invention ensures the stability of the test flow as the control target, and takes the computer automatic control system as the control core, and collects the flow signal outputted by the flow display device in real time during the operation to control the valve opening degree in the flow regulating device to realize the coarse flow adjustment, Adjust the inverter frequency of the inverter control device to achieve fine flow adjustment, and complete the dynamic adjustment of the test flow during the durability test of the heat meter flow sensor.
The invention has the advantages that the utility model has the advantages of fast response and simple operation based on computer control; the control flow stability is the control target, and the frequency conversion control technology can effectively reduce the loss of electric energy in the durability test of the heat meter flow sensor; during the test Dynamic flow regulation reduces manual intervention and high degree of automatic control, effectively reducing the operating cost of the heat meter flow sensor durability test.
Description
The invention relates to the technical field of heat meter durability test, in particular to a heat meter flow sensor durability test device and method.
Background of the invention
Before the type test or the factory, the heat meter needs to verify the reliability and durability of the heat meter by simulating its actual operating conditions and using accelerated wear. The heat meter flow sensor durability test equipment is the equipment for checking the durability of the heat meter flow sensor, and is one of the supporting equipment for the heat meter production and inspection mechanism verification.
The domestic heat meter inspection mechanism and the flow sensor durability test equipment provided by the manufacturer will have a test flow reduction phenomenon due to the loss of the pump performance after long-term operation, which needs manual adjustment, must be guarded by a person, and has high running cost. Manual adjustment control has low precision and unstable performance. In addition, a single water supply circulation method is adopted, and the power consumption is high when the test is performed under the small and medium flow points.
Summary of the invention
The invention provides a heat meter flow sensor durability test device and method capable of reducing operating cost, and the device is used for the durability test of the heat meter flow sensor, and the operation is simple and reliable.
The figure shows the structure diagram of the heat meter flow sensor durability test equipment according to the present invention.
A heat meter flow sensor durability test device, comprising: a water storage device for storing circulating water; a water supply device connected to the water outlet of the water storage device; a flow for controlling the durability of the heat meter flow sensor for water supply circulation power Size; connected to the flow regulating device connected to the inlet and outlet of the water storage device; used to control the valve opening degree, adjust the test flow rate; the frequency conversion control device is used to control the flow stability of the water supply device speed and the heat meter flow sensor durability test; The test table clamping device for fixing the test table; the flow display device connected to the flow regulating device; the computer automatic control system, by reading the collected flow information fed back by the flow display device, and real-time comparison with the preset flow rate, automatically adjusting The frequency conversion control device and the flow rate adjusting device have an adjustment precision greater than the flow rate adjusting device; in use, the tested table and the flow rate display device are sequentially connected in series between the water supply device and the flow regulating device.
A heat meter flow sensor durability test method based on the heat meter flow sensor durability test device according to the present invention, comprising the steps of: separately adjusting a frequency conversion control device and a flow regulating device after completion of a previous test phase; a computer automatic control system Reading the traffic data of the traffic display device; if the traffic value meets the traffic requirement of the next test phase, enter the next test phase; the computer automatic control system detects whether the traffic of the current test phase reaches the preset traffic at a preset time interval, if Satisfy the preset flow rate and maintain the status quo; if not, control the frequency conversion control device to adjust the flow rate so that the actual flow rate tends to the preset flow rate.
The flow dynamic adjustment of the device of the present invention is automatically implemented by the operating software of the computer automatic control system. The durability test period of the heat meter is long, and different flow points need to be switched during the test. After the long-term operation of the water supply device with the water pump as the main component in the high-temperature circulating water, the performance loss will always occur, resulting in the test flow. Unstable. The invention ensures the stability of the test flow as the control target, and takes the computer automatic control system as the control core, and collects the flow signal outputted by the flow display device in real time during the operation to control the valve opening degree in the flow regulating device to realize the coarse flow adjustment, Adjust the inverter frequency of the inverter control device to achieve fine flow adjustment, and complete the dynamic adjustment of the test flow during the durability test of the heat meter flow sensor.
The invention has the advantages that the utility model has the advantages of fast response and simple operation based on computer control; the control flow stability is the control target, and the frequency conversion control technology can effectively reduce the loss of electric energy in the durability test of the heat meter flow sensor; during the test Dynamic flow regulation reduces manual intervention and high degree of automatic control, effectively reducing the operating cost of the heat meter flow sensor durability test.
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