CN-116487080-B - Primary coil simulation device of rod position detector of nuclear power plant

Abstract

The invention relates to the field of electromagnetic induction, in particular to a primary coil simulation device of a rod position detector of a nuclear power plant. The device comprises a shell, wherein an adjusting knob is arranged on a panel of the shell, a transformer, a fixed resistor and an adjustable resistor are arranged in the shell, the fixed resistor is connected in series in a primary coil loop of the transformer, the adjustable resistor is connected in series in a secondary coil loop of the transformer, the primary coil of the transformer comprises a plurality of taps, different gear positions corresponding to the adjusting knob are respectively connected with different adjusting knobs, and different pins of the aviation plug are respectively connected into the primary coil loop and the secondary coil loop of the transformer through soft wires. The invention ensures that the rod position system successfully completes the test of related functions and meets the design requirement of the rod position system.

Inventors

• HUANG RAN
• LI TIEZHU
• ZHANG QIANG
• JIA CHENGUANG
• CAO YINGFENG
• YANG XIAOLING
• ZHAO BING
• YOU DONGCHAO
• CHENG RUICHEN
• WANG LI
• ZHANG PENGFEI
• ZHAO QING

Assignees

• 中核控制系统工程有限公司

Dates

Publication Date

20260512

Application Date

20220113

Claims (4)

1. 1. The utility model provides a nuclear power plant stick position detector primary coil analogue means which characterized in that includes: A shell, an adjusting knob is arranged on a panel of the shell, The inside of the shell is provided with a transformer, a fixed resistor, an adjustable resistor, The fixed resistor is connected in series in the primary coil loop of the transformer, the adjustable resistor is connected in series in the secondary coil loop of the transformer, The primary coil of the transformer comprises a plurality of taps which are respectively connected with different gears corresponding to the adjusting knob; the different pins of the aviation plug are respectively connected into a primary coil loop of the transformer and a secondary coil loop of the transformer through soft wires; the adjusting knob is divided into four gears of high, medium, low and phase, The II tap of the transformer is connected with the low gear of the adjusting knob, the III tap of the transformer is connected with the middle gear of the adjusting knob, and the IV tap of the transformer is connected with the high gear of the adjusting knob; The phase shift of the adjusting knob is a common end and is connected with a pin II of the fixed resistor; when the adjusting knob is placed in a closing gear, the connection between the adjusting knob and the transformer is disconnected; All connections are made through flexible wires; The I pin and the XVII pin of the aviation plug are connected to a primary coil loop of the transformer, and the III pin and the IV pin of the aviation plug are connected to a secondary coil loop of the transformer; The I pin of the aviation plug is connected with the I pin of the fixed resistor, the III pin and the IV pin of the aviation plug are respectively connected with the I, III pin of the adjustable resistor, the XVII pin of the aviation plug is connected with the I tap of the transformer, the III pin of the adjustable resistor is connected with the V tap of the transformer, and the II pin of the adjustable resistor is connected with the VI pin of the transformer.
2. 2. The primary coil simulator of a nuclear power plant rod position detector of claim 1, wherein the back of the housing is further provided with a heat sink.
3. 3. The primary coil simulator of a rod position detector for a nuclear power plant according to claim 1, wherein the aviation plug is disposed at one end of a flexible conductor, and the flexible conductor extends out of the housing through the wire outlet.
4. 4. The nuclear power plant rod position detector primary coil simulator of claim 1, wherein the aerial plug is a 19-core aerial plug.

Description

Primary coil simulation device of rod position detector of nuclear power plant Technical Field The invention relates to the field of electromagnetic induction, in particular to a primary coil simulation device of a rod position detector of a nuclear power plant. Background In the case of a long straight solenoid, if the volume is v, the number of turns per unit length is n, and the solenoid is filled with a magnetic medium having a permeability μ, the inductance of the solenoid is l=μ·n2·v, which is proportional to the permeability μ of the medium inside the solenoid. The mutual inductance of two coaxial straight solenoids is also proportional to the permeability μ of its internal medium, which can be noted as m=k·μ. When the current passing through the first solenoid is i, the magnetic flux passing through the other solenoid is=M·i=k mu.i. If i changes over time, thenAnd the magnetic flux passing through the loop area according to Faraday's law of electromagnetic inductionWhen the change occurs, the induced electromotive force generated in the loopIf i=i·sin ωt, dμ/dt=0, thenNamely, when the magnetic permeability of the medium is unchanged, the induced potential is in direct proportion to the magnetic permeability of the medium and exciting current (effective value). The rod position detector is developed according to the principle, and mainly comprises a primary coil and an auxiliary coil. The rod position detector is arranged outside the stroke shell of the driving mechanism and above the reactor pressure vessel, and the position of the reactor core is controlled by applying the coil induction principle. Since the rod position detector is in a high radiation, high temperature environment, all coil structures within the detector must be sufficiently reliable. Disclosure of Invention The invention aims to solve the technical problem of providing the primary coil simulation device of the rod position detector of the nuclear power plant, which ensures that a rod position system successfully completes the test of related functions and ensures that the rod position system meets the design requirement of the rod position system. The invention provides a primary coil simulation device of a rod position detector of a nuclear power plant, which comprises the following components: A shell, an adjusting knob is arranged on a panel of the shell, The inside of the shell is provided with a transformer, a fixed resistor, an adjustable resistor, The fixed resistor is connected in series in the primary coil loop of the transformer, the adjustable resistor is connected in series in the secondary coil loop of the transformer, The primary winding of the transformer comprises a number of taps, Different gears corresponding to the adjusting knobs are respectively connected; And different pins of the aviation plug are respectively connected into the primary coil loop of the transformer and the secondary coil loop of the transformer through soft wires. Preferably, the back of the shell is also provided with a heat dissipation hole. Preferably, the adjusting knob is divided into four gears of high, medium, low and phase, The II tap of the transformer is connected with the low gear of the adjusting knob, the III tap of the transformer is connected with the middle gear of the adjusting knob, and the IV tap of the transformer is connected with the high gear of the adjusting knob; The phase shift of the adjusting knob is a common end and is connected with a pin II of the fixed resistor; when the adjusting knob is placed in a closing gear, the connection between the adjusting knob and the transformer is disconnected; All connections are made through flexible wires. Preferably, the pin I and the pin XVII of the aviation plug are connected to a primary coil loop of the transformer, and the pin III and the pin IV of the aviation plug are connected to a secondary coil loop of the transformer. Preferably, the I pin of aviation plug is connected with the I pin of fixed resistance, and the III, IV pin of aviation plug is connected with I, III pins of adjustable resistance respectively, and the XVII pin of aviation plug is connected with the I tap of transformer. Preferably, the aviation plug is arranged at one end of the flexible conductor, and the flexible conductor extends out of the shell through the wire outlet hole. Preferably, the pin III of the adjustable resistor is connected with a V tap of the transformer, and the pin II of the adjustable resistor is connected with the pin VI of the transformer. Preferably, the aerial plug is a 19-core aerial plug. Compared with the prior art, the primary coil simulation device of the rod position detector of the nuclear power plant can meet the requirement of rod position system test, can effectively simulate the working principle of the detector, runs stably, and has important roles in the rod position system test of Fuqing 5, 6 and K-2/K-3 units and the rod position main current clamp test. Draw