Valve position indicators and valve position indicating systems
A technology of indicators and valves, which is applied in the direction of valve devices, valve details, and valve shell structures, can solve the problems of valve opening and closing state output error signals, etc., and achieve the improvement of nonlinear range, high measurement accuracy and safety, Easy maintenance and disassembly
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Embodiment 1
[0066] The valve position indicator includes the body structure of the valve position indicator 1, the body structure includes a continuous valve position signal sensing part, the continuous valve position signal sensing part includes a skeleton 13, a coil 14, and the coil 14 includes a primary coil 143 1. Secondary coil, it is characterized in that, described primary coil 143 is wound outside skeleton 13, and the quantity of described secondary coil is 2, and 2 secondary coils are wound on primary coil 143 simultaneously, wherein one secondary The number of turns of the coil increases along the midpoint of the axis of the skeleton 13 toward the end A of the skeleton 13 , and the number of turns of the other secondary coil increases along the midpoint of the axis of the skeleton 13 toward the end B of the skeleton 13 .
[0067] The above-mentioned technical solution can achieve the purpose of improving the measurement range and the strength of the measurement signal, thereby im...
Embodiment 2
[0107] A valve position indicating system,
[0108] Such as Figure 6 As shown, it includes the above-mentioned valve position indicator 1 and cabinet 6. The cabinet 6 introduces the continuous valve position signal output by the continuous valve position signal sensing part from the valve position indicator 1 and the output signal of two magnetic control switch probes. Limit signal; the limit signals of the switching value output by the two magnetically controlled switch probes are the upper limit signal and the lower limit signal respectively, and the upper limit signal and the lower limit signal respectively represent the upper limit position and the lower limit position of the valve;
[0109] The continuous valve position signal is an analog signal, the upper limit signal and the lower limit signal respectively represent the standard current signal of 4mA and 20mA;
[0110]Cabinet 6 is equipped with a self-test early warning program: if the current continuous valve positi...
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