CN212645926U - Novel thermal resistance thermometer for nuclear power station main pump air cooler - Google Patents
Novel thermal resistance thermometer for nuclear power station main pump air cooler Download PDFInfo
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- CN212645926U CN212645926U CN202020567256.1U CN202020567256U CN212645926U CN 212645926 U CN212645926 U CN 212645926U CN 202020567256 U CN202020567256 U CN 202020567256U CN 212645926 U CN212645926 U CN 212645926U
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- thermal resistance
- nuclear power
- resistance thermometer
- air cooler
- main pump
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Abstract
The utility model belongs to the technical field of nuclear power station maintenance equipment, in particular to a novel thermal resistance thermometer for a nuclear power station main pump air cooler, which comprises a sleeve, a cutting ferrule assembly, an anti-folding spring, an anti-radiation wire, a four-wire system cable and a thermal resistance thermometer; one end of the sleeve is fixed on a fixed support outside the air cooler outlet grid plate through a clamping sleeve component, and an anti-folding spring is arranged below the other end of the clamping sleeve component; an anti-radiation wire is connected below the anti-folding spring, a four-wire cable is arranged at the tail end of the anti-radiation wire, and the four-wire cable is connected with a field junction box to transmit temperature signals. The device increases the contact between wind and the temperature sensing element, and improves the accuracy of temperature measurement of the thermometer; the clamping sleeve component is used for preventing the tail cable from being stressed in the rotating and fixing process of the temperature probe; the problem of loosening of the plug in a high-vibration environment is avoided; the abrasion or bending of the cable insulation package in the cable bending process is protected; the accuracy of long distance transmission of signals is improved.
Description
Technical Field
The utility model belongs to the technical field of the nuclear power station overhauls equipment, concretely relates to novel thermal resistance thermometer is used to nuclear power station main pump air cooler.
Background
The thermal resistance thermometer for the air cooler of the main pump of the nuclear power station is mainly used for monitoring the inlet and outlet temperatures of the air cooler of the main pump motor, the accuracy and the reliability of temperature measurement directly influence the safe operation of the main pump motor, and the thermal resistance thermometer belongs to important monitoring parameters on a main pump.
Thermal resistance is one of the most commonly used temperature detectors in the medium and low temperature regions. Its main features are high measuring accuracy and stable performance. The measurement accuracy of the platinum thermal resistance is the highest, and the platinum thermal resistance measuring instrument is not only widely applied to industrial temperature measurement, but also made into a standard reference instrument.
Thermal resistance thermometry is based on the property that the resistance of a metal conductor increases with increasing temperature. The thermal resistor is mostly made of pure metal materials, platinum and copper are most widely used at present, and nickel, manganese, rhodium and other materials are used for manufacturing the thermal resistor. Types of thermal resistors include:
1) common type thermal resistor
As is known from the principle of measuring the temperature of the thermal resistor, the change in the measured temperature is directly measured by the change in the thermal resistor, and therefore, the change in the resistance of various wires such as the lead wire of the thermal resistor affects the temperature measurement.
2) Armored thermal resistor
The armored thermal resistor is a solid body formed by combining a temperature sensing element (a resistor), a lead, an insulating material and a stainless steel sleeve, and the outer diameter of the armored thermal resistor is generally phi 2-phi 8mm and can be up to phi mm at least. Compared with the common type thermal resistor.
3) End face thermal resistor
The end face thermal resistance temperature sensing element is wound by a specially processed resistance wire and is tightly attached to the end face of the thermometer. Compared with the common axial thermal resistor, the axial thermal resistor can reflect the actual temperature of the measured end face more accurately and quickly, and is suitable for measuring the end face temperature of a bearing bush and other machine parts.
4) Flame-proof type thermal resistor
The explosion-proof thermal resistor limits the explosion of explosive mixed gas in the shell of the explosion-proof thermal resistor due to the influence of sparks or electric arcs and the like in the junction box through the junction box with a special structure, and cannot cause superexplosion in a production field. The flame-proof type thermal resistor can be used for measuring the temperature of a place with explosion danger in a Bla-B3 c grade area.
Temperature probe and cable use quick plug connection in the original design of thermal resistance thermometer for nuclear power station main pump air cooler, because the thermometer is in long-term vibration environment during the main pump operation, often produces the phenomenon that temperature signal fluctuates or loses, and the root cause is that the phenomenon that the plug becomes flexible and inside contact pin pine takes off appears in long-term vibration environment in the quick plug of temperature probe and cable.
According to the situation of field defects, the conventional thermometer cannot meet the harsh use conditions of the main pump of the nuclear power station at present, and often fails during the operation of the main pump, so that the reliable operation of the main pump is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at above-mentioned drawback, provide a novel thermal resistance thermometer is used to nuclear power station main pump air cooler, solve the unstable or lost phenomenon of high vibration ambient signal, increased the reliability of main pump operation.
The technical scheme of the utility model as follows:
a novel thermal resistance thermometer for a nuclear power station main pump air cooler comprises a sleeve, a clamping sleeve assembly, an anti-folding spring, an anti-radiation lead, a four-wire system cable and a thermal resistance thermometer; one end of the sleeve is fixed on a fixed support outside the air cooler outlet grid plate through a clamping sleeve component, and an anti-folding spring is arranged below the other end of the clamping sleeve component; an anti-radiation wire is connected below the anti-folding spring, a four-wire cable is arranged at the tail end of the anti-radiation wire, and the four-wire cable is connected with a field junction box to transmit temperature signals.
The utility model provides a nuclear power station main pump air cooler is with novel thermal resistance thermometer, the cutting ferrule size of cutting ferrule subassembly is M16X 1.5, and the cutting ferrule fastens cutting ferrule subassembly and fixed bolster.
The utility model provides a nuclear power station main pump air cooler is with novel thermal resistance thermometer, the four-wire system cable is connected with the junction box at scene, and the four-wire system cable other end links to each other with the thermal resistance thermometer, and the thermal resistance thermometer loops through the wire of preventing shining, prevents inside spring and the cutting ferrule subassembly of rolling over, extends to the cover intraduct.
A novel thermal resistance thermometer for a nuclear power station main pump air cooler is characterized in that a sleeve ventilation hole is formed in the wall of the other end of a sleeve.
A novel thermal resistance thermometer for a nuclear power station main pump air cooler is characterized in that a sleeve ventilation air hole in a sleeve is fully aligned with a ventilation opening.
A novel thermal resistance thermometer for a nuclear power station main pump air cooler is applied to temperature measurement in a pump.
A novel thermal resistance thermometer for a nuclear power station main pump air cooler is applied to internal temperature measurement of a main pump in a nuclear power station.
The beneficial effects of the utility model reside in that:
according to the technical scheme, the contact between wind and the temperature sensing element is increased, and the temperature measuring accuracy of the thermometer is improved; the clamping sleeve component is used for preventing the tail cable from being stressed in the rotating and fixing process of the temperature probe;
the problem of loosening of the plug in a high-vibration environment is avoided;
the abrasion or bending of the cable insulation package in the cable bending process is protected;
adapting to the radiation environment of the site;
the accuracy of long distance transmission of signals is improved.
Drawings
Fig. 1 is a schematic structural diagram of the device of the present invention.
In the figure, the cable comprises a sleeve 1, a sleeve 2, a ferrule assembly 3, an anti-folding spring 4, an anti-radiation conducting wire 7, a sleeve ventilation air hole and a four-wire cable 8.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, a novel thermal resistance thermometer for a nuclear power station main pump air cooler comprises a sleeve 1, a ferrule assembly 2, an anti-folding spring 3, an anti-radiation lead 4, a four-wire cable 8 and a thermal resistance thermometer;
one end of the sleeve 1 is fixed on a fixed support outside the air cooler outlet grid plate through a clamping sleeve component 2, and an anti-folding spring 3 is arranged below the other end of the clamping sleeve component 2 and used for eliminating the influence of mechanical vibration in the field use process and preventing the loss of signals after the signal lines are broken;
the size is that the cutting ferrule of M16 is multiplied by 1.5 fastens cutting ferrule subassembly 2 and fixed bolster, is connected with anti-radiation wire 4 below preventing folding spring 3, is applicable to the radiation environment of thermometer use scene, prevents the influence of irradiation to the thermometer, and the end of anti-radiation wire 4 is provided with four-wire system cable 8, and four-wire system cable 8 is connected with the junction box of scene, conveys temperature signal.
The other end of the four-wire system cable 8 is connected with a thermal resistance thermometer, and the thermal resistance thermometer sequentially passes through the anti-radiation conducting wire 4, is prevented from being folded inside the spring 3 and the clamping sleeve assembly and extends to the inside of the sleeve 1.
A sleeve ventilation air hole 7 is formed in the wall of the other end of the sleeve 1; the sleeve vent holes 7 on the sleeve 1 are substantially aligned with the vent openings.
During specific work, firstly, the thermometer is verified, and the temperature verification steps are as follows: four wiring terminals of the four-wire system cable 8 are respectively connected to a thermometer calibration device;
the calibration device respectively measures the resistance values of the thermometer connecting terminals in pairs;
connecting four wiring wire cores of the four-wire cable 8 in parallel;
measuring the insulation resistance of the cable to the ground by using an insulation meter;
after the measurement is finished, discharging the cable cores to the ground one by one;
and finishing the verification.
Claims (8)
1. A novel thermal resistance thermometer for a nuclear power station main pump air cooler comprises a sleeve, a clamping sleeve assembly, an anti-folding spring, an anti-radiation lead, a four-wire system cable and a thermal resistance thermometer; the method is characterized in that: one end of the sleeve is fixed on a fixed support outside the air cooler outlet grid plate through a clamping sleeve component, and an anti-folding spring is arranged below the other end of the clamping sleeve component; an anti-radiation wire is connected below the anti-folding spring, a four-wire cable is arranged at the tail end of the anti-radiation wire, and the four-wire cable is connected with a field junction box to transmit temperature signals.
2. The novel thermal resistance thermometer for the air cooler of the main pump of the nuclear power plant as claimed in claim 1, wherein: the cutting ferrule size of cutting ferrule subassembly is M16X 1.5, and the cutting ferrule fastens cutting ferrule subassembly and fixed bolster.
3. The novel thermal resistance thermometer for the air cooler of the main pump of the nuclear power plant as claimed in claim 1, wherein: the four-wire system cable is connected with a junction box on the spot, and the other end of the four-wire system cable is connected with the thermal resistance thermometer.
4. The novel thermal resistance thermometer for the air cooler of the main pump of the nuclear power plant as claimed in claim 1, wherein: the thermal resistance thermometer passes through the anti-radiation wire in sequence, and the anti-folding spring and the clamping sleeve component extend to the inside of the sleeve.
5. The novel thermal resistance thermometer for the air cooler of the main pump of the nuclear power plant as claimed in claim 1, wherein: and a sleeve ventilation air hole is formed in the wall of the other end of the sleeve.
6. The novel thermal resistance thermometer for the air cooler of the main pump of the nuclear power plant as claimed in any one of claims 1 to 5, wherein: the sleeve ventilation air holes on the sleeve are fully aligned with the ventilation openings.
7. The novel thermal resistance thermometer for the air cooler of the main pump of the nuclear power plant as claimed in claim 1, wherein: the thermometer is used for measuring the temperature in the pump.
8. The novel thermal resistance thermometer for the air cooler of the main pump of the nuclear power plant as claimed in claim 1, wherein: the thermometer is applied to internal temperature measurement of a main pump in a nuclear power station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020567256.1U CN212645926U (en) | 2020-04-16 | 2020-04-16 | Novel thermal resistance thermometer for nuclear power station main pump air cooler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020567256.1U CN212645926U (en) | 2020-04-16 | 2020-04-16 | Novel thermal resistance thermometer for nuclear power station main pump air cooler |
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| CN212645926U true CN212645926U (en) | 2021-03-02 |
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| CN202020567256.1U Active CN212645926U (en) | 2020-04-16 | 2020-04-16 | Novel thermal resistance thermometer for nuclear power station main pump air cooler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114216577A (en) * | 2021-11-27 | 2022-03-22 | 孙雨欣 | Polymer PTC temperature sensor |
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2020
- 2020-04-16 CN CN202020567256.1U patent/CN212645926U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114216577A (en) * | 2021-11-27 | 2022-03-22 | 孙雨欣 | Polymer PTC temperature sensor |
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