Heating device for Siemens 3AT2-1E circuit breaker nitrogen cylinder

Abstract

The invention discloses a heating device for a Siemens 3AT2-1E circuit breaker nitrogen cylinder. The heating device comprises a heating / radiating pipe, a sucking pump, a protection device, a heating device and a battery, the battery is directly connected with the heating device, the protection device is connected with the heating / radiating pipe, the heating / radiating pipe surrounds the nitrogen cylinder, an air inlet of the heating / radiating pipe is connected with the heating device, the heating device comprises a current coil and a heating rod, and an air outlet of the heating / radiating pipe is provided with an air extracting pump; the device can more conveniently detect the operation state of the nitrogen cylinder of the circuit breaker, so that the ambient temperature of the nitrogen cylinder is maintained in a stable range, the stable operation of the nitrogen cylinder is protected, the frequency of frequently checking equipment in an extreme environment by a maintainer is reduced, and the correctness and usability of the equipment and the safety and reliability of cut-off fault current are ensured; the method has important reference value for improving safe and stable operation of a power system.

Description

Technical Field

[0001] The invention relates to the technical field of electrical circuit breaker protection, and in particular to a heating device for a nitrogen cylinder of a Siemens 3AT2-1E circuit breaker. Background Art

[0002] At present, Siemens 3AT2-1E circuit breakers are commonly used in 500kV substations. Their nitrogen cylinders are outside the equipment and are greatly affected by the environment. The higher the ambient temperature, the greater the gas pressure inside the nitrogen cylinder, sometimes close to the action value of the pressure relief valve. The lower the ambient temperature, the lower the gas pressure inside the nitrogen cylinder. Frequent pressure application or pressure failure due to failure to build up pressure will cause pressure application timeouts, which will cause maintenance personnel to frequently go to the site for processing. In addition, it is easy to cause the circuit breaker control circuit to be locked due to the reduced pressure of the hydraulic energy storage system, expanding the scope of the accident. Therefore, it is necessary to develop a heating device for the nitrogen cylinder of the Siemens 3AT2-1E circuit breaker to solve the above technical problems and improve the safe and stable operation of the power system. Summary of the invention

[0003] The invention provides a heating device for a nitrogen cylinder of a Siemens 3AT2-1E circuit breaker, so as to solve the problem that a 500kV Siemens 3AT2-1E circuit breaker adopts an external nitrogen cylinder and is greatly affected by the external environment temperature.

[0004] The present invention provides a heating device for a nitrogen cylinder of a Siemens 3AT2-1E circuit breaker, comprising: a heating / heat dissipation pipe, an air extraction pump, a protection device, a heating device and a battery; the battery and the heating device are directly connected, the protection device is connected to the heating / heat dissipation pipe, the heating / heat dissipation pipe surrounds the nitrogen cylinder, the air inlet of the heating / heat dissipation pipe is connected to the heating device, the heating device comprises a current coil and a heating rod, and the air outlet of the heating / heat dissipation pipe is provided with an air extraction pump; The vacuum pump is used to accelerate the gas circulation in the heating / heat dissipation pipe when the ambient temperature data of the nitrogen cylinder is greater than or equal to the high temperature threshold, so as to reduce the temperature of the air surrounding the nitrogen cylinder and realize cold circulation; The battery is used to provide a current with a changed direction to the coil through the battery when the ambient temperature data around the nitrogen cylinder is less than a low temperature threshold, and to increase the temperature of the heating rod by utilizing the thermal effect generated by the magnetic flux induction principle. At the same time, the air pump accelerates the gas circulation in the heating / heat dissipation pipe, so that hot air is around the nitrogen cylinder to increase the temperature of the nitrogen cylinder, thereby realizing thermal circulation.

[0005] Furthermore, the heating device for the nitrogen cylinder of the Siemens 3AT2-1E circuit breaker also includes: a pressure sensor, a temperature sensor and a temperature-pressure analysis device; the pressure sensor is attached to the inside of the nitrogen cylinder to detect the gas pressure data inside the nitrogen cylinder; the temperature sensor is attached to the outside of the nitrogen cylinder to detect the ambient temperature data of the nitrogen cylinder; the temperature-pressure analysis device is communicatively connected to the pressure sensor and the temperature sensor.

[0006] Furthermore, the temperature-pressure analysis device is used to statistically analyze temperature data and pressure data; determine whether the temperature data or pressure data is greater than or equal to a preset threshold, and if the temperature data or pressure data is greater than or equal to the preset threshold, start the device; if the temperature data or pressure data is less than the preset threshold, shut down the device.

[0007] The present invention has the following beneficial effects: the heating device for the nitrogen cylinder of the Siemens 3AT2-1E circuit breaker of the present invention can more conveniently detect the operating state of the nitrogen cylinder of the circuit breaker, maintain the ambient temperature of the nitrogen cylinder within a stable range, protect the stable operation of the nitrogen cylinder, reduce the number of frequent equipment inspections by maintenance personnel in extreme environments, ensure the correctness and usability of the equipment, and cut off the safety and reliability of fault current, which has important reference value for improving the safe and stable operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0009] Figure 1 A schematic diagram of a heating device for a nitrogen cylinder of a Siemens 3AT2-1E circuit breaker provided by the present invention.

[0010] Illustration: 1- heating / cooling pipe; 2- vacuum pump; 3- protection device; 4- heating device; 5- battery; 6- temperature-pressure analysis device; 100- nitrogen cylinder. DETAILED DESCRIPTION

[0011] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The technical solutions provided by the embodiments of the present invention are described in detail below in conjunction with the drawings.

[0012] See also Figure 1 , a heating device for a nitrogen cylinder of a Siemens 3AT2-1E circuit breaker provided by the present invention, comprising: a heating / heat dissipation pipe 1, an air extraction pump 2, a protection device 3, a heating device 4, a battery 5, a temperature-pressure analysis device 6, a pressure sensor, and a temperature sensor.

[0013] Among them, the battery 5 and the heating device 4 are directly connected. The protection device 3 is connected to the heating / heat dissipation pipe 1, and the protection device includes a thermistor and a temperature sensor. The temperature is controlled by the thermistor. When the temperature of the temperature sensor exceeds the maximum temperature, the power supply is automatically cut off to prevent fire. The heating / heat dissipation pipe 1 surrounds the nitrogen cylinder 100 and plays a major role in heat circulation or cold circulation; the air inlet of the heating / heat dissipation pipe 1 is connected to the heating device 4, and the heating device 4 includes a current coil and a heating rod. The heating rod is in the middle of the current coil. Due to the Joule heat generated by magnetic flux induction, the air inlet of the heating / heat dissipation pipe 1 is at the bottom of the heating device 4, and the outside air is inhaled and heated through the heating rod to realize the heat circulation. Or in hot weather, the heating is not started to realize the cold circulation. The air outlet of the heating / heat dissipation pipe 1 is provided with an exhaust pump 2.

[0014] The pressure sensor is attached to the inside of the nitrogen cylinder 100 to detect the gas pressure data in the nitrogen cylinder 100; the temperature sensor is attached to the outside of the nitrogen cylinder 100 to detect the ambient temperature data of the nitrogen cylinder 100; the temperature-pressure analysis device 6 is communicatively connected with the pressure sensor and the temperature sensor.

[0015] The device determines the environment of the device by detecting the internal gas pressure and external temperature of the nitrogen cylinder, and keeps the nitrogen cylinder in a stable environment through hot or cold cycles, thereby improving the operating stability of the circuit breaker.

[0016] The temperature-pressure analysis device 6 is used for statistically analyzing temperature data and pressure data; judging whether the temperature data or pressure data is greater than or equal to a preset threshold value, if the temperature data or pressure data is greater than or equal to the preset threshold value, starting the device; if the temperature data or pressure data is less than the preset threshold value, shutting down the device.

[0017] The vacuum pump 2 is used to accelerate the gas circulation in the heating / heat dissipation pipe 1 when the ambient temperature data of the nitrogen cylinder 100 is greater than or equal to the high temperature threshold, so as to reduce the temperature of the air surrounding the nitrogen cylinder 100 and realize cold circulation; The battery 5 is used to provide the coil with a current with a changed direction through the battery 5 when the ambient temperature data around the nitrogen cylinder 100 is lower than the low temperature threshold, and the temperature of the heating rod is increased by the thermal effect generated by the magnetic flux induction principle. At the same time, the vacuum pump 2 accelerates the gas circulation in the heating / heat dissipation pipe 1, so that the hot air around the nitrogen cylinder 100 increases the temperature of the nitrogen cylinder 100, thereby realizing a thermal cycle.

[0018] This device performs temperature-pressure detection on the nitrogen cylinder external to the Siemens 3AT2-1E circuit breaker, and regulates the temperature of the nitrogen cylinder in extreme environments to ensure that the temperature of the nitrogen tank is appropriate. There is no need to change the internal structure of the original circuit breaker equipment, and there is no need to change the position of the nitrogen cylinder. It is battery-powered and easy to replace. The heating device contains a current coil and a heating rod, and uses the Joule heating effect generated by the magnetic flux principle to heat the gas in the suction device. The device can reduce the temperature change of the nitrogen cylinder to an appropriate range without changing the original internal wiring method of the equipment, thereby improving the reliability of the equipment in extreme environments.

[0019] In summary, this device can realize continuous heating of the nitrogen cylinder in winter to reduce the impact of low temperature on the nitrogen cylinder, and can also take away the heat around the nitrogen cylinder through airflow in summer to cool the nitrogen cylinder. The eddy current thermal effect in electromagnetic induction is used as a heat source collection method, which is more environmentally friendly and energy-saving, and does not change any internal wiring method of the original equipment. At the same time, the temperature is maintained at a constant value, and the temperature change is controlled within a small range. The nitrogen pressure change within the controllable range has been achieved to reduce the workload of maintenance personnel and reduce the stay time in high-risk environments, thereby improving the impact of extreme ambient temperatures on the operating equipment and the reliable operation indicators, ensuring the correctness and usability of the equipment, and the safety and reliability of cutting off the fault current.

[0020] The above-described embodiments of the present invention do not limit the protection scope of the present invention.

Claims

1. A heating device for the nitrogen cylinder of Siemens 3AT2-1E circuit breaker, characterized in that: include: A heating / heat dissipation pipe (1), an air extraction pump (2), a protective device (3), a heating device (4) and a battery (5); the battery (5) and the heating device (4) are directly connected, the protective device (3) is connected to the heating / heat dissipation pipe (1), the heating / heat dissipation pipe (1) surrounds the nitrogen cylinder (100), the air inlet of the heating / heat dissipation pipe (1) is connected to the heating device (4), the heating device (4) comprises a current coil and a heating rod, and the air outlet of the heating / heat dissipation pipe (1) is provided with an air extraction pump (2); The vacuum pump (2) is used to accelerate the gas circulation in the heating / heat dissipation pipe (1) when the ambient temperature data of the nitrogen cylinder (100) is greater than or equal to a high temperature threshold, so as to reduce the temperature of the air surrounding the nitrogen cylinder (100) and realize a cold cycle; The battery (5) is used to provide a current with a changed direction to the coil through the battery (5) when the ambient temperature data of the nitrogen cylinder (100) is less than a low temperature threshold, so as to increase the temperature of the heating rod by utilizing the thermal effect generated by the magnetic flux induction principle, and at the same time, the air pump (2) accelerates the gas circulation in the heating / heat dissipation pipe (1), so that hot air is around the nitrogen cylinder (100) to increase the temperature of the nitrogen cylinder (100), thereby realizing a thermal cycle.

2. A heating device for a nitrogen cylinder of a Siemens 3AT2-1E circuit breaker as claimed in claim 1, characterized in that: Also includes: A pressure sensor, a temperature sensor, and a temperature-pressure analysis device (6); the pressure sensor is attached to the inside of the nitrogen cylinder (100) and is used to detect gas pressure data in the nitrogen cylinder (100); the temperature sensor is attached to the outside of the nitrogen cylinder (100) and is used to detect ambient temperature data around the nitrogen cylinder (100); the temperature-pressure analysis device (6) is communicatively connected to the pressure sensor and the temperature sensor.

3. A heating device for a nitrogen cylinder of a Siemens 3AT2-1E circuit breaker as claimed in claim 2, characterized in that: The temperature-pressure analysis device (6) is used to statistically analyze temperature data and pressure data; determine whether the temperature data or the pressure data is greater than or equal to a preset threshold value, and if the temperature data or the pressure data is greater than or equal to the preset threshold value, start the device; if the temperature data or the pressure data is less than the preset threshold value, shut down the device.

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