CN211401511U - Spring pressure detection on-site module applied to transformer substation - Google Patents

Abstract

The utility model discloses a be applied to spring pressure detection of transformer substation and block on the spot, include: the device comprises a first pressure sensor, a second pressure sensor, a signal modulation circuit, a CPU, a wireless communication module and a power module for supplying power, wherein the first pressure sensor is installed on a closing energy storage spring, the second pressure sensor is installed on an opening energy storage spring, the signal output ends of the first pressure sensor and the second pressure sensor are connected with the input end of the signal modulation circuit, the output end of the signal modulation circuit is connected with the signal input end of the CPU to be used for inputting pressure signals into the CPU after processing, and the output end of the CPU is connected with the wireless communication module to be used for feeding pressure data back to a background host. The operating mechanism in the high-voltage circuit breaker can be monitored, once the pressure of the spring is too large or too small, an alarm is sent out through the wireless communication module in time, maintenance personnel are informed to process the alarm, potential safety hazards are avoided, and normal stable operation of a transformer substation is guaranteed.

Description

Spring pressure detection on-site module applied to transformer substation

Technical Field

The utility model relates to a transformer substation monitoring field, specificly relate to a be applied to spring pressure detection of transformer substation module on the spot.

Background

Common high-voltage circuit breaker operating mechanisms are electromagnetic operating mechanisms, spring operating mechanisms, and hydraulic operating mechanisms. The spring operating mechanism plays a role in protecting and controlling the power system by switching on or off the circuit, and the breaker mainly completes switching on and off through the spring operating mechanism. The energy-saving switch-on device utilizes potential energy stored in a spring in advance as switch-on energy and generally comprises a switch-on energy system and a switch-off and switch-on transmission system. The action time of the automatic switching-on device is not influenced by weather and voltage change, the reliability of switching-on performance is guaranteed, the operation is stable, the switching-on speed is high, the requirement on a power supply is low, and the automatic switching-on device can better adapt to the requirement on the automatic operation in the current world. In addition, the action time and the working stroke are short, the operation and maintenance are simple, however, in practical application, the output force characteristic of a closing spring of the spring operating mechanism is poorly matched with the load characteristic of the circuit breaker, compared with other types of mechanisms, the output force characteristic of the closing spring of the spring operating mechanism needs larger energy, and the weight is obviously increased along with the increase of the operating power.

In the spring operating mechanism of the circuit breaker, the force released by the opening and closing spring determines the output force of the system in the opening and closing process, and meanwhile, the spring works under the variable load of compression and tension in the circuit breaker, so that the fatigue phenomenon can be inevitably generated in long-term use. When a closing spring is in metal fatigue, the stress condition of the whole mechanism is generally reduced, force and energy cannot be effectively transmitted among all parts, and the spring is prevented from generating a failure or misoperation accident or even breaking when being opened or closed in the operation process, so that the high-voltage circuit breaker cannot realize closing operation and the normal operation of a transformer substation is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the invention provides a spring pressure detection on-site module applied to a transformer substation, which can monitor the stress change of an energy storage spring of a circuit breaker in real time and avoid the occurrence of faults.

According to the utility model discloses be applied to spring pressure detection of transformer substation module on the spot installs on the circuit breaker, installs combined floodgate energy storage spring and separating brake energy storage spring in the circuit breaker, include: the device comprises a first pressure sensor, a second pressure sensor, a signal modulation circuit, a CPU, a wireless communication module and a power module for supplying power, wherein the first pressure sensor is installed on a closing energy storage spring, the second pressure sensor is installed on a separating energy storage spring, the signal output ends of the first pressure sensor and the second pressure sensor are connected with the input end of the signal modulation circuit, the output end of the signal modulation circuit is connected with the signal input end of the CPU to be used for inputting pressure signals into the CPU after processing, and the output end of the CPU is connected with the wireless communication module to be used for feeding pressure data back to a background host.

According to the utility model discloses be applied to spring pressure detection of transformer substation module on the spot has following technological effect at least:

the stress of the closing energy storage spring is fed back through the first pressure sensor, the stress of the opening energy storage spring is fed back through the second pressure sensor, the signal modulation circuit processes the analog signal and then converts the analog signal into a digital signal to be fed back to the CPU, the CPU draws a corresponding waveform through the related data of the fed back spring pressure, and a change curve diagram of the stress is used for judging the occurrence of lossless and fatigue conditions of the spring, so that the abnormal closing or opening caused by the abnormal spring pressure is avoided. The operating mechanism in the high-voltage circuit breaker can be monitored, once the pressure of the spring is too large or too small, an alarm is sent out through the wireless communication module in time, maintenance personnel are informed to process the alarm, potential safety hazards are avoided, and normal stable operation of a transformer substation is guaranteed.

According to the utility model discloses a some embodiments, signal modulation circuit is including the filter circuit, amplifier circuit and the AD converting circuit who connects gradually, pressure sensor links to each other with filter circuit's input, AD converting circuit's output links to each other with CPU's signal input part.

According to the utility model discloses a some embodiments still include the display screen, display screen and CPU electric connection are in order to be used for showing pressure numerical value.

According to some embodiments of the invention, the wireless communication module is a GPRS module.

According to some embodiments of the invention, the model of the CPU is TMS320F 2812.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic diagram of an installation position of a first/second pressure sensor in a circuit breaker according to an embodiment of the present invention;

FIG. 2 is a schematic block diagram of a spring pressure detection in-situ module according to an embodiment of the present invention;

fig. 3 is a schematic circuit diagram of a signal modulation circuit according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the positional descriptions, such as the directions or positional relationships indicated by the upper, lower, front, rear, left, right, etc., are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 2, a spring pressure sensing on-site module applied to a substation includes: the signal output ends of the first pressure sensor 110 and the second pressure sensor 120 are both connected with the input end of the signal modulation circuit 200, referring to fig. 3, the signal modulation circuit 200 includes a filter circuit, an amplifier circuit and an a/D conversion circuit, which are connected in sequence, the filter circuit is composed of electrostatic protection diodes Z17 and Z19, a common mode inductor L1, a capacitor C139, a resistor R142, a resistor R143, and a resistor R148, the amplifier circuit is composed of an amplifier U25B, a capacitor C143, and a resistor R150, the pressure sensor is connected with the input end of the filter circuit, the output end of the a/D conversion circuit is connected with the signal input end of the CPU300, the analog signal fed back by the pressure sensor is amplified, filtered and converted into a digital signal to be input to the CPU300, the display screen 500 is electrically connected with the CPU300 for displaying the pressure value, the output end of the CPU300 is connected to the wireless communication module 400 for feeding back the pressure data to the background host, preferably, the wireless communication module 400 in this embodiment adopts a GPRS module, and may also adopt other wireless communication modules such as 3G/4G, and the model of the CPU300 is TMS320F 2812.

The operating principle of the breaker opening and closing is as follows: the motor enables the closing spring to compress and store mechanical energy through the fine energy transmission system, and the spring is kept in a fine energy state through the closing locking device after the energy storage is finished, and the power supply of the motor is cut off. When a closing signal is received, the closing locking device releases energy stored by the closing energy storage spring. Part of the energy enables a moving contact of the circuit breaker to act through a transmission mechanism, and closing operation is completed; the other part enables the opening energy storage spring to store energy through the transmission mechanism of the transmission mechanism, and preparation is made for the opening state. When the opening signal is received, the opening locking device is released, the energy stored by the opening energy storage spring is released, and the contact is driven to perform opening action.

Referring to fig. 1, the first pressure sensor 110 is installed on a closing energy storage spring, the second pressure sensor 120 is installed on an opening energy storage spring, the first pressure sensor 110/the second pressure sensor 120 includes a base, a pressure sensitive element cover plate and an output cable, the base includes a through hole with an annular shoulder, the pressure sensitive element is arranged on the annular shoulder of the through hole, one end of an output signal line is connected with the pressure sensitive element, the other end is connected with an input end of an amplifying circuit, and the working principle of the amplifying circuit is that a current output which slightly changes is generated on a pressure sensitive element under the pressure action of a measured medium is transmitted to the signal modulation circuit 200 to be processed and then input to the CPU 300.

To sum up, the embodiment of the utility model provides a through the stress of first pressure sensor 110 feedback combined floodgate energy storage spring, through the stress of second pressure sensor 120 feedback separating brake energy storage spring, signal modulation circuit 200 feeds back into digital signal with analog signal processing after-conversion to CPU300, and CPU300 draws corresponding waveform through the relevant data of the spring pressure of feedback, through the change curve diagram of stress to can judge that the spring has the appearance of lossless, fatigue situation, avoid leading to combined floodgate or separating brake unusual because spring pressure is unusual. The operating mechanism in the high-voltage circuit breaker can be monitored, once the pressure of the spring is too large or too small, an alarm is sent out through the wireless communication module in time, maintenance personnel are informed to process the alarm, potential safety hazards are avoided, and normal stable operation of a transformer substation is guaranteed.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (5)

1. The utility model provides a be applied to spring pressure detection of transformer substation module on spot, installs closing a floodgate energy storage spring and separating brake energy storage spring on the circuit breaker, its characterized in that includes in the circuit breaker: the power supply comprises a first pressure sensor (110), a second pressure sensor (120), a signal modulation circuit (200), a CPU (300), a wireless communication module (400) and a power supply module for supplying power, wherein the first pressure sensor (110) is installed on a closing energy storage spring, the second pressure sensor (120) is installed on an opening energy storage spring, the signal output ends of the first pressure sensor (110) and the second pressure sensor (120) are connected with the input end of the signal modulation circuit (200), the output end of the signal modulation circuit (200) is connected with the signal input end of the CPU (300) to be used for inputting pressure signals into the CPU (300) after being processed, and the output end of the CPU (300) is connected with the wireless communication module (400) to be used for feeding pressure data back to a background host.

2. The on-site spring pressure sensing module for a substation of claim 1, wherein: the signal modulation circuit (200) comprises a filter circuit, an amplifying circuit and an A/D conversion circuit which are sequentially connected, the pressure sensor is connected with the input end of the filter circuit, and the output end of the A/D conversion circuit is connected with the signal input end of the CPU (300).

3. The on-site spring pressure sensing module for a substation of claim 1, wherein: the pressure gauge further comprises a display screen (500), wherein the display screen (500) is electrically connected with the CPU (300) and used for displaying the pressure value.

4. The on-site spring pressure sensing module for a substation of claim 1, wherein: the wireless communication module (400) is a GPRS module.

5. The on-site spring pressure sensing module for a substation of claim 1, wherein: the model of the CPU (300) is TMS320F 2812.

Images