Temperature interlocking judgment method, system and equipment
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A technology of interlocking and interlocking value, applied in the direction of temperature control, control/regulation systems, instruments, etc., can solve the problems of waste of raw materials and intermediate products, and wrong stop of the unit.
Pending Publication Date: 2022-05-13
SHANXI LUAN COAL BASED CLEAN ENERGY
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Problems solved by technology
However, in actual production, due to temperature point problems, disconnection or fluctuations, or temperature instrument failures, the unit may stop by mistake, which will affect production and cause a huge waste of raw materials and intermediate products.
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Embodiment 1
[0045] Such as figure 1 as shown, figure 1 It is a flowchart of a temperature interlock judging method provided by an embodiment of the present invention, and the temperature interlock judging method includes:
[0046] Obtain the real-time temperature value of the preset temperature collection point;
[0047] Generate a temperature extraction signal with a preset period;
[0048] performing temperature extraction on the real-time temperature value according to the waveform of the temperature extraction signal;
[0049] Calculate the absolute value of the difference between two adjacent extracted temperature values to obtain the temperature change value;
[0050] Comparing the real-time temperature value with the preset temperature interlock value, when the real-time temperature value is greater than or equal to the preset temperature interlock value, the output temperature state is abnormal, and when the real-time temperature value is less than the preset When the temper...
Embodiment 2
[0070] For ease of understanding, this embodiment describes the temperature interlock judgment system through a DCS configuration diagram and a DCS configuration module diagram.
[0071] The temperature interlock judgment system includes an acquisition unit, an extraction signal generation unit, an extraction signal trigger unit, a processing unit, a first judgment unit, a second judgment unit and a temperature interlock trigger unit;
[0072] The collection unit is used to obtain the real-time temperature value of the preset temperature collection point;
[0073] The extraction signal generating unit is used to generate a temperature extraction signal of a preset period;
[0074] The extraction signal triggering unit is configured to perform temperature extraction on the real-time temperature value according to the waveform of the temperature extraction signal;
[0075] The processing unit is used to calculate the absolute value of the difference between two adjacent extract...
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Abstract
The invention relates to a temperature interlocking judgment method, system and equipment, and the method is characterized in that the method comprises the steps: obtaining a real-time temperature value of a preset temperature collection point; generating a temperature extraction signal of a preset period and extracting a real-time temperature value according to the waveform of the temperature extraction signal; calculating an absolute value of a difference value of the temperature values extracted in two adjacent times to obtain a temperature change value; when the real-time temperature value is larger than or equal to a preset temperature interlocking value, the output temperature state is abnormal, and when the real-time temperature value is smaller than the preset temperature interlocking value, the output temperature state is normal; when the temperature change value is larger than or equal to a preset temperature change threshold value, the output temperature change state is abnormal, and when the temperature change value is smaller than the preset temperature change threshold value, the output temperature change state is normal; when the temperature state is abnormal and the temperature change state is normal, temperature interlocking of related equipment of the preset temperature acquisition point is triggered, and temperature interlocking is not triggered under other conditions; while normal temperature interlocking triggering is ensured, temperature change is judged, and mistaken shutdown of a unit is avoided.
Description
technical field [0001] The invention relates to the field of temperature interlock technology, in particular to a temperature interlock judging system. Background technique [0002] At present, the systems of various devices in many factories are generally DCS systems, including ABB 800XA system, Siemens PCS7 and Honeywell C300, etc. The production site of the device contains a large number of large units and high-speed pumps. In order to protect these units and ensure the safe and stable operation of the production device, a temperature single-point interlock is set for the stator temperature, shaft temperature, and bearing bush temperature. When the temperature exceeds the safe operating range, Force certain related equipment to start or stop, so that it can protect the equipment from overheating, keep the production equipment and operators in a safe state, and protect the unit. However, in actual production, due to temperature point problems, disconnection or fluctuation...
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