High anti-seismic self-checking gas density relay and self-checking method thereof

Abstract

The application provides a high anti-shock self-checking gas density relay and a self-checking method thereof. The high anti-shock self-checking gas density relay comprises a gas density relay body, a pointer, a transmission rod, a contact point signal generator, a calibration unit, a first pressure sensor, a second pressure sensor, a first temperature sensor, a second temperature sensor, a smart control unit, and a first clamping needle, a second clamping needle, a first counterweight, a second counterweight, a first spring, a second spring and an annular tooth member arranged on the gas density relay body. The self-checking method is used for self-calibration of the high anti-shock self-checking gas density relay. The self-calibration of the gas density relay is realized, the specific device causing the fault can be located, power-off is not required during calibration, manpower and calibration cost are saved, the anti-shock performance is high, the fault misjudgment caused by vibration is avoided, and the accuracy of the self-checking result is improved.

Description

Technical Field

[0001] This application relates to the field of electronics and power, and in particular to a high shock-resistant, self-testing gas density relay and its self-testing method. Background Technology

[0002] SF6 electrical equipment is widely used in power systems. SF6 is an insulating medium used for insulation and arc extinguishing in high-voltage electrical equipment. The gas density of SF6 in high-voltage electrical equipment affects its insulation performance. Therefore, monitoring the density of SF6 gas is crucial for ensuring the safe operation of high-voltage electrical equipment and the normal operation of the power system.

[0003] A gas density relay is a device installed on SF6 electrical equipment to detect changes in the density of SF6 gas within the equipment. If the SF6 gas density drops below a preset threshold, an alarm signal is issued to prevent catastrophic explosions during the operation of the SF6 electrical equipment. Therefore, the proper functioning of the gas density relay directly affects the safe operation of the SF6 electrical equipment. Regular inspection of the SF6 gas density relays on SF6 electrical equipment is a necessary measure to prevent potential accidents and ensure the safe and reliable operation of SF6 electrical equipment. Both the "Electric Power Preventive Testing Regulations" and the "Twenty-Five Key Requirements for Preventing Major Accidents in Power Production" require regular calibration of SF6 gas density relays. From practical operational experience, regular calibration of SF6 gas density relays is one of the essential means to ensure the safe and reliable operation of power equipment.

[0004] In existing technologies, gas density relays are mainly inspected manually by maintenance personnel on-site periodically. This process is labor-intensive, resource-intensive, inefficient, and costly. Furthermore, the significant vibrations generated during opening and closing can cause accidental contact even when the gas density meets requirements, leading to misdiagnosis of a faulty gas density relay. Summary of the Invention

[0005] In view of the problems in the prior art, this application provides a high shock-resistant, self-testing gas density relay and its self-testing method, which can at least partially solve the problems existing in the prior art.

[0006] In a first aspect, this application provides a highly shock-resistant and self-testable gas density relay, comprising: a gas density relay body, a pointer, a transmission rod, a contact signal generator, a calibration unit, a first pressure sensor, a second pressure sensor, a first temperature sensor, a second temperature sensor, an intelligent control unit, and a first locking pin, a second locking pin, a first counterweight, a second counterweight, a first spring, a second spring, and a ring tooth component disposed on the gas density relay body.

[0007] The pointer of the gas density relay body is provided with a slide rail slot at each end;

[0008] The transmission rod is connected to the contact signal generator and the pointer respectively. The rotation of the pointer triggers the contact signal generator to generate a contact closure signal or a contact reset signal.

[0009] The verification unit is connected to the contact signal generator and the intelligent control unit to generate contact signals and transmit them to the intelligent control unit; the contact signals include: the contact closure signal or the contact reset signal and the density value collected by the verification unit from the gas density relay body when the contact closure signal or the contact reset signal is received;

[0010] The intelligent control unit is connected to the first pressure sensor, the second pressure sensor, the first temperature sensor, and the second temperature sensor to receive monitoring results and perform fault detection based on the monitoring results and the contact signals.

[0011] The first and second pins are respectively engaged in the corresponding slide rail slots;

[0012] The first counterweight is disposed on the first chuck pin, and the second counterweight is disposed on the second chuck pin;

[0013] One end of the first spring is fixed to the pointer, and the other end is connected to the first pin.

[0014] One end of the second spring is fixed to the pointer, and the other end is connected to the second pin.

[0015] The monitoring results include a first pressure value monitored by a first pressure sensor, a second pressure value monitored by a second pressure sensor, a first temperature value monitored by a first temperature sensor, and a second temperature value monitored by a second temperature sensor; the intelligent control unit includes:

[0016] A density value acquisition unit is used to acquire a first density value based on a first pressure value and a first temperature value, and to acquire a second density value based on a second pressure value and a second temperature value;

[0017] The density comparison unit is used to compare whether the difference between the first density value and the second density value exceeds a preset first threshold; if so, the first pressure sensor, the second pressure sensor, the first temperature sensor, or the second temperature sensor has malfunctioned.

[0018] The intelligent control unit further includes:

[0019] The first diagnostic module, when the first pressure sensor, the second pressure sensor, the first temperature sensor, and the second temperature sensor are not faulty, is used to determine whether the first density value and the second density value are both lower than a second threshold; if the first density value and the second density value are lower than the second threshold and the contact signal is not sent, then the gas density relay body is faulty; if the first density value and the second density value are both greater than the second threshold and the density value in the contact signal is less than the second threshold, then the gas density relay body is faulty.

[0020] The second diagnostic module, when the first pressure sensor, the second pressure sensor, the first temperature sensor, or the second temperature sensor malfunctions, is used to determine whether the first density value or the second density value is lower than the second threshold. If the first density value is less than the second threshold, the second density value is greater than the second threshold, and the contact signal is not sent, then the first pressure sensor and / or the first temperature sensor malfunctions. If the first density value is less than the second threshold, the second density value is greater than the second threshold, and the density value in the contact signal is less than the second threshold, then the second pressure sensor and / or the second temperature sensor malfunctions. If the first density value is greater than the second threshold, the second density value is less than the second threshold, and the contact signal is not sent, then the second pressure sensor and / or the second temperature sensor malfunctions. If the first density value is greater than the second threshold, the second density value is less than the second threshold, and the density value in the contact signal is less than the second threshold, then the first pressure sensor and / or the first temperature sensor malfunctions.

[0021] The intelligent control unit further includes:

[0022] The first positioning submodule, when the first pressure sensor and / or the first temperature sensor malfunctions, is used to compare the first pressure value with the second pressure value and / or the first temperature value with the second temperature value; if the difference between the first pressure value and the second pressure value is greater than a preset third threshold, the first pressure sensor malfunctions; if the difference between the first pressure value and the second pressure value is less than the preset third threshold, the first temperature sensor malfunctions; if the difference between the first temperature value and the second temperature value is less than a preset fourth threshold, the first pressure sensor malfunctions; if the difference between the first temperature value and the second temperature value is greater than the preset fourth threshold, the first temperature sensor malfunctions.

[0023] The second positioning submodule, when the second pressure sensor and / or the second temperature sensor malfunctions, is used to compare the first pressure value with the second pressure value and / or the first temperature value with the second temperature value; if the difference between the first pressure value and the second pressure value is greater than a preset third threshold, the second pressure sensor malfunctions; if the difference between the first pressure value and the second pressure value is less than the preset third threshold, the second temperature sensor malfunctions; if the difference between the first temperature value and the second temperature value is less than a preset fourth threshold, the second pressure sensor malfunctions; if the difference between the first temperature value and the second temperature value is greater than the preset fourth threshold, the second temperature sensor malfunctions.

[0024] The intelligent control unit further includes:

[0025] The pressure value comparison unit is used to compare the first pressure value with the second pressure value. If the difference between the first pressure value and the second pressure value is greater than a preset third threshold, then the first pressure sensor or the second pressure sensor is faulty.

[0026] A temperature comparison unit is used to compare the first temperature value with the second temperature value; if the difference between the first temperature value and the second temperature value is greater than a preset fourth threshold, then the first temperature sensor or the second temperature sensor is faulty.

[0027] Secondly, this application provides a self-testing method for a gas density relay, comprising:

[0028] Receives a first pressure value monitored by a first pressure sensor, a second pressure value monitored by a second pressure sensor, a first temperature value monitored by a first temperature sensor, and a second temperature value monitored by a second temperature sensor;

[0029] The contact signal is acquired, including a contact closure signal or a contact reset signal and a density value collected from the gas density relay body when the verification unit receives the contact closure signal or the contact reset signal;

[0030] Fault detection is performed based on the first pressure value, the second pressure value, the first temperature value, the second temperature value, and the contact signal acquisition results.

[0031] The high-vibration-resistant, self-testing gas density relay and its self-testing method provided in this application achieve self-testing of the gas density relay by setting up a gas density relay body, pointer, transmission rod, contact signal generator, calibration unit, first pressure sensor, second pressure sensor, first temperature sensor, second temperature sensor, intelligent control unit, and first locking pin, second locking pin, first counterweight, second counterweight, first spring, second spring, and ring tooth component set on the gas density relay body. This eliminates the need for manual on-site calibration of the gas density relay and does not require power interruption during calibration, saving manpower and calibration costs. When a fault occurs, it can quickly locate the specific location of the fault. At the same time, it has high vibration resistance, which can prevent false fault judgments caused by vibration during opening and closing, thus improving the accuracy of the self-testing results. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of a high shock-resistant, self-testing gas density relay provided in an embodiment of this application;

[0034] Figure 2 This is a schematic diagram of the structure of a high shock-resistant, self-testing gas density relay provided in an embodiment of this application;

[0035] Figure 3 This is a schematic diagram of the structure of a high shock-resistant, self-testing gas density relay provided in an embodiment of this application;

[0036] Figure 4A This is a schematic diagram of the structure of a high shock-resistant, self-testing gas density relay provided in an embodiment of this application;

[0037] Figure 4B This is a schematic diagram of the structure of a high shock-resistant, self-testing gas density relay provided in an embodiment of this application;

[0038] Figure 5 This is a schematic diagram of the structure of an intelligent control unit provided in an embodiment of this application;

[0039] Figure 6 This is a schematic diagram of the structure of an intelligent control unit provided in an embodiment of this application;

[0040] Figure 7 This is a schematic diagram of the structure of an intelligent control unit provided in an embodiment of this application;

[0041] Figure 8 This is a schematic diagram of the structure of an intelligent control unit provided in an embodiment of this application;

[0042] Figure 9 This is a flowchart of a gas density relay self-testing method provided in an embodiment of this application;

[0043] Figure 10 This is a flowchart of a gas density relay self-testing method provided in an embodiment of this application;

[0044] Figure 11 This is a flowchart of a gas density relay self-testing method provided in an embodiment of this application;

[0045] Figure 12 This is a flowchart of a gas density relay self-testing method provided in an embodiment of this application;

[0046] Figure 13 This is a flowchart of a gas density relay self-testing method provided in an embodiment of this application. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0048] Figures 1 to 3 , Figure 4A and Figure 4B This is a schematic diagram of the structure of a high-vibration-resistant, self-testing gas density relay provided in an embodiment of this application, as shown below. Figures 1 to 3 , Figure 4A and Figure 4B As shown, the high shock-resistant and self-testing gas density relay provided in this application includes: a gas density relay body 101, a pointer 102, a transmission rod 103, a contact signal generator 104, a verification unit 105, a first pressure sensor 106A, a second pressure sensor 106B, a first temperature sensor 107A, a second temperature sensor 107B, an intelligent control unit 108, and a first locking pin 109A, a second locking pin 109B, a first counterweight 110A, a second counterweight 110B, a first spring 111A, a second spring 111B, and a ring tooth component 112 disposed on the gas density relay body 101;

[0049] The pointer 102 of the gas density relay body 101 is provided with a slide rail slot 102A and 102B at both ends respectively;

[0050] Specifically, please refer to Figure 4A and Figure 4B The pointer 102 is connected to the gas density relay body 101 through the central circular hole 102C, and is used to indicate the gas density detected by the gas density relay body 101. The annular toothed member 112 is disposed on the dial of the gas density relay body 101. The pointer 102 and the annular toothed member 112 are not connected to each other, and there is a gap along the direction perpendicular to the dial of the gas density relay body 101, rather than being coplanar.

[0051] In one embodiment, such as Figure 2 As shown, the gas density relay body 101 includes a pressure detector 101-1 and a temperature compensation element 101-2. The temperature compensation element 101-2 is used to adjust the temperature inside the device under test so that the temperature inside the device under test is maintained at 20°C. The gas pressure value detected by the pressure detector 101-1 at 20°C is the gas density value in the device under test.

[0052] The transmission rod 103 is connected to the contact signal generator 104 and the pointer 102 respectively. The rotation of the pointer 102 triggers the contact signal generator 104 to generate a contact closure signal or a contact reset signal.

[0053] Specifically, the contact signal generator 104 is, for example, a micro switch. The transmission rod 103 transmits the rotation of the pointer 102 to the actuating spring of the micro switch. When the actuating spring is displaced to the critical point, it generates an instantaneous action, causing the moving contact at the end of the actuating spring to quickly connect or disconnect with the fixed contact, generating a contact closure signal. When the force on the transmission element is removed, the actuating spring generates a reverse action force. When the reverse stroke of the transmission element reaches the actuation critical point of the spring, the reverse action is completed instantaneously, generating a contact reset signal. When the micro switch is actuated and the moving contact connects with the fixed contact, the density value indicated by the pointer 102 is called the operating value of the high-vibration-resistant self-testable gas density relay; when the micro switch completes the reverse action and resets, the density value indicated by the pointer 102 is called the return value of the high-vibration-resistant self-testable gas density relay. The contact signal generator 104 can also be, for example, a pressure sensor, but this application is not limited thereto.

[0054] The verification unit 105 is connected to the contact signal generator 104 and the intelligent control unit 108 to generate contact signals and transmit them to the intelligent control unit 108. The contact signals include: contact closing signals or contact reset signals and density values ​​collected by the verification unit 105 from the gas density relay body 101 when it receives the contact closing signals or contact reset signals.

[0055] Specifically, when the verification unit 105 receives a contact closure signal or a contact reset signal, it records the contact closure signal or the contact reset signal, and collects the instantaneous value of the density collected by the gas density relay body 101 when the signal is received, and generates a contact signal to send to the intelligent control unit 108.

[0056] The intelligent control unit 108 is connected to the first pressure sensor 106A, the second pressure sensor 106B, the first temperature sensor 107A, and the second temperature sensor 107B to receive monitoring results and perform fault detection based on the monitoring results and contact signals.

[0057] Specifically, the intelligent control unit 108 collects in real time the first pressure value monitored by the first pressure sensor 106A, the second pressure value detected by the second pressure sensor 106B, the first temperature value detected by the first temperature sensor 107A, and the second temperature value detected by the second temperature sensor 107B, and performs fault monitoring based on the aforementioned monitoring structure, the presence of contact signals, and the density value of the contact signals. The first pressure sensor 106A and the second pressure sensor 106B are connected to the gas density relay body 101 in the gas path.

[0058] In one embodiment, such as Figure 5 As shown, the intelligent control unit 108 includes:

[0059] Density value acquisition unit 108-1 is used to acquire a first density value based on a first pressure value and a first temperature value, and to acquire a second density value based on a second pressure value and a second temperature value;

[0060] Specifically, the density value acquisition unit 108-1 converts the first pressure value into the corresponding pressure value at 20°C based on the first temperature value. When the volume of the gas and the amount of substance are constant, the temperature value and the pressure value are directly proportional. The converted pressure value is the first density value of the gas in the device under test. Similarly, the second pressure value is converted based on the second temperature value to obtain the second density value.

[0061] The density comparison unit 108-2 is used to compare whether the difference between the first density value and the second density value exceeds a preset first threshold; if so, the first pressure sensor 106A, the second pressure sensor 106B, the first temperature sensor 107A, or the second temperature sensor 107B has malfunctioned.

[0062] Specifically, since there may be differences in the models and locations of various devices, there will inevitably be slight deviations between the first density value and the second density value. An allowable error range can be set as the first threshold according to the actual situation. When the difference between the first density value and the second density value exceeds the first threshold, it indicates that some devices are faulty.

[0063] The high seismic-resistant, self-testing gas density relay provided in this application, by setting up a density value acquisition unit 108-1 and a density value comparison unit 108-2, can preliminarily confirm whether a fault has occurred, realizing the self-testing function of the high seismic-resistant, self-testing gas density relay, saving manpower and improving testing efficiency.

[0064] exist Figure 5 Based on the embodiments, further, such as Figure 6 As shown, the intelligent control unit 108 also includes: a first diagnostic module 108-3 and a second diagnostic module 108-4.

[0065] When the first pressure sensor 106A, the second pressure sensor 106B, the first temperature sensor 107A, and the second temperature sensor 107B are not faulty, the first diagnostic module 108-3 is used to determine whether the first density value and the second density value are both lower than the second threshold. If the first density value and the second density value are lower than the second threshold and the contact signal is not sent, the gas density relay body 101 is faulty. If the first density value and the second density value are both greater than the second threshold and the density value in the contact signal is less than the second threshold, the gas density relay body 101 is faulty.

[0066] Specifically, if the difference between the first density value and the second density value is less than the first threshold, it indicates that both the first and second density values ​​are relatively accurate measurement results. In this case, if both the first and second density values ​​are less than the second threshold, but the intelligent control unit 108 does not receive a contact signal; or if the first and second density values ​​are greater than the second threshold, but the intelligent control unit 108 receives a contact signal, and the density value of the contact signal is less than the second threshold, it indicates that the gas density relay body 101 has malfunctioned and cannot properly monitor the density value and respond. The second threshold is typically set as the operating value of the gas density relay, i.e., the density value at which, under normal circumstances, the gas density relay body 101 detects a decrease in gas density, and the pointer 102 drives the transmission rod 103 to activate the contact signal generator 104.

[0067] In another embodiment, the second threshold can also be set as the return value of the gas density relay. In this case, if both the first density value and the second density value are greater than the second threshold, but the intelligent control unit 108 does not receive the contact signal; or if the first density value and the second density value are less than the second threshold, but the intelligent control unit 108 receives the contact signal and the density value of the contact signal is greater than the second threshold, it indicates that the gas density relay body 101 has malfunctioned.

[0068] When the first pressure sensor 106A, the second pressure sensor 106B, the first temperature sensor 107A, or the second temperature sensor 107B malfunctions, the second diagnostic module 108-4 determines whether the first density value or the second density value is lower than a second threshold. If the first density value is less than the second threshold, the second density value is greater than the second threshold, and no contact signal is sent, then the first pressure sensor 106A and / or the first temperature sensor 107A malfunctions. If the first density value is less than the second threshold, the second density value is greater than the second threshold, and the density value in the contact signal is less than the second threshold, then the second pressure sensor 106B and / or the second temperature sensor 107B malfunctions. If the first density value is greater than the second threshold, the second density value is less than the second threshold, and no contact signal is sent, then the second pressure sensor 106B and / or the second temperature sensor 107B malfunctions. If the first density value is greater than the second threshold, the second density value is less than the second threshold, and the density value in the contact signal is less than the second threshold, then the first pressure sensor 106A and / or the first temperature sensor 107A malfunctions.

[0069] Specifically, if there is a fault among the first pressure sensor 106A, the second pressure sensor 106B, the first temperature sensor 107A, and the second temperature sensor 107B, the scope of the fault can be further determined based on the reception and density values ​​of the contact signals: When no contact signal is received, it indicates that the gas density in the measured device is greater than the second threshold. If the first density value is less than the second threshold, then the first pressure sensor 106A and / or the first temperature sensor 107A has malfunctioned. If the first density value is greater than the second threshold, then the first density value is consistent with the detection result of the gas density relay body 101, indicating that there is no problem with the first density value, and thus the second pressure sensor 106B and / or the second temperature sensor 107B has malfunctioned. When a contact signal is received and the density value of the contact signal is less than the second threshold, if the first density value is less than the second threshold, then the second pressure sensor 106B and / or the second temperature sensor 107B has malfunctioned; if the first density value is greater than the second threshold, then the first pressure sensor 106A and / or the first temperature sensor 107A has malfunctioned. Similarly, a determination can also be made based on the second density value. The specific determination method is similar to that based on the first density value, and will not be repeated here. Furthermore, both the first and second density values ​​can be used simultaneously for determination to obtain a more accurate result.

[0070] The high-vibration-resistant, self-testing gas density relay provided in this application, by setting a first diagnostic module 108-3 and a second diagnostic module 108-4, can further locate the fault location when a fault occurs, enabling maintenance personnel to quickly complete the judgment and repair of the faulty part, further saving manpower and improving the calibration efficiency. At the same time, it can complete the testing of the gas density relay body to ensure the normal operation of the gas density relay body.

[0071] exist Figure 6 Based on the embodiments, further, such as Figure 7 As shown, the intelligent control unit 108 also includes:

[0072] The first positioning submodule 108-5, when the first pressure sensor 106A and / or the first temperature sensor 107A malfunction, is used to compare the first pressure value with the second pressure value and / or the first temperature value with the second temperature value; if the difference between the first pressure value and the second pressure value is greater than a preset third threshold, then the first pressure sensor 106A malfunctions; if the difference between the first pressure value and the second pressure value is less than the preset third threshold, then the first temperature sensor 107A malfunctions; if the difference between the first temperature value and the second temperature value is less than a preset fourth threshold, then the first pressure sensor 106A malfunctions; if the difference between the first temperature value and the second temperature value is greater than the preset fourth threshold, then the first temperature sensor 107A malfunctions.

[0073] Specifically, when it is determined that the faulty device is the first pressure sensor 106A and / or the first temperature sensor 107A, the specific location of the fault can be further determined by combining the monitoring results of the second pressure sensor 106B and the second temperature sensor 107B. For example, based on the first pressure value, if the difference between the first pressure value and the second pressure value is less than a third threshold, then the first temperature sensor 107A is faulty; otherwise, the first pressure sensor 106A is faulty. Similarly, it can also be determined based on the first temperature value. If the difference between the first temperature value and the second temperature value is less than a fourth threshold, then the first pressure sensor 106A is faulty; otherwise, the first temperature sensor 107A is faulty. The third and fourth thresholds can be set according to the actual situation such as the accuracy of the pressure sensor and the temperature sensor, and this application does not impose any restrictions on them.

[0074] The second positioning submodule 108-6, when the second pressure sensor 106B and / or the second temperature sensor 107B malfunction, is used to compare the first pressure value with the second pressure value and / or the first temperature value with the second temperature value; if the difference between the first pressure value and the second pressure value is greater than a preset third threshold, then the second pressure sensor 106B malfunctions; if the difference between the first pressure value and the second pressure value is less than the preset third threshold, then the second temperature sensor 107B malfunctions; if the difference between the first temperature value and the second temperature value is less than a preset fourth threshold, then the second pressure sensor 106B malfunctions; if the difference between the first temperature value and the second temperature value is greater than the preset fourth threshold, then the second temperature sensor 107B malfunctions.

[0075] Specifically, when it is determined that the faulty device is the second pressure sensor 106B and / or the second temperature sensor 107B, the specific location of the fault can be further determined by combining the monitoring results of the first pressure sensor 106A and the first temperature sensor 107A. For example, based on the second pressure value, if the difference between the second pressure value and the first pressure value is less than a third threshold, then the second temperature sensor 107B is faulty; otherwise, the second pressure sensor 106B is faulty. Similarly, it can also be determined based on the second temperature value. If the difference between the second temperature value and the first temperature value is less than a fourth threshold, then the second pressure sensor 106B is faulty; otherwise, the second temperature sensor 107B is faulty.

[0076] The high-vibration-resistant, self-testing gas density relay provided in this application, by setting a first positioning submodule 108-5 and a second positioning submodule 108-6, achieves specific location of faulty components while completing self-testing. When a fault occurs, staff do not need to search for the faulty components themselves, simplifying the maintenance process and saving manpower.

[0077] In one embodiment, such as Figure 8 As shown, the intelligent control unit 108 also includes:

[0078] The pressure value comparison unit 108-7 is used to compare the first pressure value with the second pressure value. If the difference between the first pressure value and the second pressure value is greater than the preset third threshold, the first pressure sensor 106A or the second pressure sensor 106B will malfunction.

[0079] Specifically, the first pressure value and the second pressure value can be directly compared to determine whether the first pressure sensor 106A or the second pressure sensor 106B is faulty. When the first pressure sensor 106A or the second pressure sensor 106B is faulty, the corresponding density value can be calculated by combining the first temperature value and the second temperature value. Furthermore, based on the presence and density value of the contact signal, the specific faulty device can be identified. The specific principle can be found in [reference needed]. Figure 5 The relevant content in the embodiments will not be repeated here.

[0080] Temperature comparison unit 108-8 is used to compare a first temperature value with a second temperature value; if the difference between the first temperature value and the second temperature value is greater than a preset fourth threshold, then the first temperature sensor 107A or the second temperature sensor 107B is faulty.

[0081] Specifically, the first temperature value and the second temperature value can be directly compared to determine whether the first temperature sensor 107A or the second temperature sensor 107B is faulty. Similarly, when the first temperature sensor 107A or the second temperature sensor 107B is faulty, the corresponding density value can be calculated by combining the first pressure value and the second pressure value, and the specific faulty device can be further determined based on the presence and density value of the contact signal. This will not be elaborated further here.

[0082] The first caliper pin 109A and the second caliper pin 109B are respectively engaged in the corresponding slide rail slots 102A and 102B;

[0083] Specifically, such as Figure 4A and Figure 4B As shown, the first caliper pin 109A can move along the slide rail slot 102A, and the second caliper pin 109B can move along the slide rail slot 102B.

[0084] The first counterweight 110A is set on the first caliper pin 109A, and the second counterweight 110B is set on the second caliper pin 109B;

[0085] Specifically, such as Figure 4B As shown, one end of the first counterweight 110A is fixed to the first caliper pin 109A, and the other end hangs down naturally. The first counterweight 110A can swing about the fixed point as an axis. Similarly, one end of the second counterweight 110B is fixed to the second caliper pin 109B, and the other end hangs down naturally. The second counterweight 110B can swing about the fixed point as an axis.

[0086] One end of the first spring 111A is fixed to the pointer 102, and the other end is connected to the first jack pin 109A;

[0087] Specifically, one end of the first spring 111A is fixed to the middle of the pointer 102, and the other end is connected to the first locking pin 109A, providing a pulling force to the first locking pin 109A to prevent the first locking pin 109A from moving to the end of the slide rail slot 102A under the combined action of itself and the first counterweight 110A in a static state, and getting stuck in the ring tooth member 112, so that the pointer 102 cannot move normally.

[0088] One end of the second spring 111B is fixed to the pointer 102, and the other end is connected to the second pin 109B.

[0089] Specifically, one end of the second spring 111B is fixed to the middle of the pointer 102, and the other end is connected to the second locking pin 109B, providing a pulling force to the second locking pin 109B to prevent the second locking pin 109B from moving to the end of the slide rail slot 102B under the combined action of itself and the second counterweight 110B in a static state, and getting stuck in the ring tooth member 112, so that the pointer 102 cannot move normally.

[0090] The high-vibration-resistant, self-testing gas density relay provided in this application achieves self-testing functionality by incorporating a gas density relay body, pointer, transmission rod, contact signal generator, calibration unit, first pressure sensor, second pressure sensor, first temperature sensor, second temperature sensor, intelligent control unit, and first and second locking pins, first and second counterweights, first and second springs, and a ring-tooth component mounted on the gas density relay body. This allows for accurate location of the faulty component while simultaneously detecting the presence of a fault. Furthermore, it exhibits high vibration resistance, preventing misjudgments of faults during circuit opening and closing, thus avoiding alarms received by maintenance personnel even when no fault has occurred. This saves manpower and improves calibration and maintenance efficiency.

[0091] The seismic resistance principle of the high seismic resistance direct gas density relay provided in this application is explained in detail below:

[0092] When electrical equipment vibrates significantly due to opening and closing of circuit breakers, the vibration is transmitted to the gas density relay body 101. The vibration wave is transmitted to the first counterweight 110A and the second counterweight 110B and converted into kinetic energy. The first counterweight 110A and the second counterweight 110B swing around a fixed point, breaking the force balance between the first locking pin 109A and the second locking pin 109B under the action of spring tension (or elasticity) and gravity. Correspondingly, the first locking pin 109A and the second locking pin 109B slide in the corresponding slide rail slots 102A and 102B, respectively. By setting slide rail slots 102A and 102B, the movement direction of the pin can be restricted. When the end of the slide rail slot 102A of the first pin 109A or the end of the slide rail slot 102B of the second pin 109B moves to the end of the slide rail slot 102B, the end of the pin away from the spring is engaged in the ring tooth member 112, thereby restricting the rotation of the pointer 102 and preventing the pointer 102 from shaking due to large vibrations, which would drive the transmission rod 103 to move and cause the contact signal generator 104 to be falsely triggered to produce a contact signal.

[0093] Based on the same inventive concept, this application also provides a gas density relay self-testing method, which can be implemented by the device described in the above embodiments. Therefore, the implementation of the gas density relay self-testing method can refer to the description of the embodiments of the high shock-resistant self-testing gas density relay, and the repeated parts will not be described again.

[0094] The following describes the specific implementation process of the gas density relay self-testing method provided in this embodiment of the invention, taking the intelligent control unit as the execution subject as an example.

[0095] Figure 9 This is a flowchart of a gas density relay self-testing method provided in an embodiment of this application, as shown below. Figure 9 As shown, the gas density relay self-testing method provided in this application includes:

[0096] S901: Receives a first pressure value monitored by a first pressure sensor, a second pressure value monitored by a second pressure sensor, a first temperature value monitored by a first temperature sensor, and a second temperature value monitored by a second temperature sensor;

[0097] S902: Obtain the contact signal stored in the verification unit;

[0098] S903: Fault detection is performed based on the first pressure value, the second pressure value, the first temperature value, the second temperature value, and the contact signal acquisition results.

[0099] The gas density relay self-testing method provided in this application receives a first pressure value monitored by a first pressure sensor, a second pressure value monitored by a second pressure sensor, a first temperature value monitored by a first temperature sensor, and a second temperature value monitored by a second temperature sensor; acquires contact signals stored in a calibration unit; and performs fault detection based on the first pressure value, the second pressure value, the first temperature value, the second temperature value, and the contact signal acquisition results. This method achieves self-calibration of the gas density relay, eliminating the need for manual testing of the gas density relay and ensuring that the power is not interrupted during the testing process, thus saving manpower and improving testing efficiency.

[0100] The following is a detailed explanation of each step.

[0101] S901: Receives a first pressure value monitored by a first pressure sensor, a second pressure value monitored by a second pressure sensor, a first temperature value monitored by a first temperature sensor, and a second temperature value monitored by a second temperature sensor;

[0102] Specifically, the intelligent control unit receives the first pressure value monitored by the first pressure sensor, the second pressure value monitored by the second pressure sensor, the first temperature value monitored by the first temperature sensor, and the second temperature value monitored by the second temperature sensor for subsequent comparison and verification.

[0103] S902: Obtain contact signal;

[0104] Specifically, the intelligent control unit acquires the contact signals stored in the verification unit. These contact signals include contact closure signals or contact reset signals, as well as the density value collected by the verification unit from the gas density relay body when it receives the contact closure signal or contact reset signal.

[0105] S903: Fault detection is performed based on the first pressure value, the second pressure value, the first temperature value, the second temperature value, and the contact signal acquisition results.

[0106] Specifically, the intelligent control unit compares and verifies the first pressure value, the second pressure value, the first temperature value, the second temperature value, and the contact signal acquisition results, and determines whether there is a fault based on the comparison results.

[0107] In one embodiment, such as Figure 10 As shown, S903 includes:

[0108] S1001: Obtain a first density value based on a first pressure value and a first temperature value, and obtain a second density value based on a second pressure value and a second temperature value;

[0109] Specifically, the intelligent control unit converts the first pressure value into the corresponding pressure value at 20°C based on the first temperature value. The converted pressure value is the first density value of the gas inside the device being tested. Similarly, the second pressure value is converted based on the second temperature value to obtain the second density value.

[0110] S1002: Compare whether the difference between the first density value and the second density value exceeds a preset first threshold to determine whether a fault has occurred.

[0111] Specifically, if the difference between the first density value and the second density value exceeds a preset first threshold, then the first pressure sensor, the second pressure sensor, the first temperature sensor, or the second temperature sensor malfunctions; otherwise, the first pressure sensor, the second pressure sensor, the first temperature sensor, and the second temperature sensor do not malfunction.

[0112] The gas density relay self-testing method provided in this application obtains a first density value based on a first pressure value and a first temperature value, and obtains a second density value based on a second pressure value and a second temperature value; by comparing whether the difference between the first density value and the second density value exceeds a preset first threshold, it can preliminarily confirm whether a fault has occurred, realizing the self-testing function of a highly shock-resistant and self-testing gas density relay, saving manpower and improving test efficiency.

[0113] exist Figure 10 Based on the embodiments, further, such as Figure 11 As shown, after S1002, it also includes:

[0114] S1101: When the first pressure sensor, the second pressure sensor, the first temperature sensor, and the second temperature sensor are not faulty, determine whether the first density value and the second density value are both lower than the second threshold, and determine whether the gas density relay body is faulty based on the judgment result and the contact signal.

[0115] Specifically, if the first density value and the second density value are lower than the second threshold and no contact signal is sent, the gas density relay body malfunctions; if the first density value and the second density value are both greater than the second threshold and the density value in the contact signal is less than the second threshold, the gas density relay body malfunctions.

[0116] S1102: When the first pressure sensor, the second pressure sensor, the first temperature sensor, or the second temperature sensor malfunctions, determine whether the first density value or the second density value is lower than the second threshold, and determine the range of the malfunction based on the determination result and the contact signal.

[0117] Specifically, if the first density value is less than the second threshold, the second density value is greater than the second threshold, and the contact signal is not sent, then the first pressure sensor and / or the first temperature sensor has malfunctioned; if the first density value is less than the second threshold, the second density value is greater than the second threshold, and the density value in the contact signal is less than the second threshold, then the second pressure sensor and / or the second temperature sensor has malfunctioned; if the first density value is greater than the second threshold, the second density value is less than the second threshold, and the contact signal is not sent, then the second pressure sensor and / or the second temperature sensor has malfunctioned; if the first density value is greater than the second threshold, the second density value is less than the second threshold, and the density value in the contact signal is less than the second threshold, then the first pressure sensor and / or the first temperature sensor has malfunctioned.

[0118] The gas density relay self-testing method provided in this application determines whether the first density value and the second density value are both lower than a second threshold when the first pressure sensor, the second pressure sensor, the first temperature sensor, and the second temperature sensor are not faulty. Based on the determination result and the contact signal, it determines whether the gas density relay body has malfunctioned. When the first pressure sensor, the second pressure sensor, the first temperature sensor, or the second temperature sensor malfunctions, it determines whether the first density value or the second density value is lower than the second threshold. Based on the determination result and the contact signal, it determines the scope of the fault. This allows maintenance personnel to quickly identify and repair the faulty part, further saving manpower and improving calibration efficiency. At the same time, it can complete the detection of the gas density relay body, ensuring the normal operation of the gas density relay body.

[0119] exist Figure 11 Based on the embodiments, further, such as Figure 12 As shown, after S1102, it also includes:

[0120] S1201: When the first pressure sensor and / or the first temperature sensor malfunctions, compare the first pressure value with the second pressure value and / or the first temperature value with the second temperature value.

[0121] Specifically, if the difference between the first pressure value and the second pressure value is greater than a preset third threshold, the first pressure sensor malfunctions; if the difference between the first pressure value and the second pressure value is less than a preset third threshold, the first temperature sensor malfunctions; if the difference between the first temperature value and the second temperature value is less than a preset fourth threshold, the first pressure sensor malfunctions; if the difference between the first temperature value and the second temperature value is greater than a preset fourth threshold, the first temperature sensor malfunctions.

[0122] S1202: When the second pressure sensor and / or the second temperature sensor malfunctions, compare the first pressure value with the second pressure value and / or the first temperature value with the second temperature value.

[0123] Specifically, if the difference between the first pressure value and the second pressure value is greater than a preset third threshold, the second pressure sensor malfunctions; if the difference between the first pressure value and the second pressure value is less than a preset third threshold, the second temperature sensor malfunctions; if the difference between the first temperature value and the second temperature value is less than a preset fourth threshold, the second pressure sensor malfunctions; and if the difference between the first temperature value and the second temperature value is greater than a preset fourth threshold, the second temperature sensor malfunctions.

[0124] The gas density relay self-testing method provided in this application compares the first pressure value with the second pressure value and / or the first temperature value with the second temperature value when the first pressure sensor and / or the first temperature sensor malfunctions; and compares the first pressure value with the second pressure value and / or the first temperature value with the second temperature value when the second pressure sensor and / or the second temperature sensor malfunctions. This method not only performs self-testing but also pinpoints the location of the faulty component. When a fault occurs, personnel are not required to manually locate the faulty component, simplifying the maintenance process and saving manpower.

[0125] In one embodiment, such as Figure 13 As shown, S903 also includes:

[0126] S1301: Compare the first pressure value with the second pressure value. If the difference between the first pressure value and the second pressure value is greater than the preset third threshold, then the first pressure sensor or the second pressure sensor is faulty.

[0127] Specifically, the intelligent control unit can directly compare the first pressure value and the second pressure value to determine whether the first or second pressure sensor is faulty. When the first or second pressure sensor is faulty, the corresponding density value can be calculated by combining the first and second temperature values. Based on the presence and density value of the contact signal, the specific faulty device can be identified. The specific principle can be found in [reference needed]. Figure 11 The relevant content of S1102 in the corresponding embodiment will not be repeated here.

[0128] S1302: Compare the first temperature value with the second temperature value; if the difference between the first temperature value and the second temperature value is greater than the preset fourth threshold, then the first temperature sensor or the second temperature sensor is faulty.

[0129] Specifically, the intelligent control unit can directly compare the first temperature value and the second temperature value to determine whether the first temperature sensor or the second temperature sensor is faulty. Similarly, when the first temperature sensor or the second temperature sensor is faulty, the corresponding density value can be calculated by combining the first pressure value and the second pressure value, and the specific faulty device can be determined based on the presence and density value of the contact signal. This will not be elaborated further here.

[0130] The gas density relay self-testing method provided in this application diagnoses faults by comparing a first pressure value with a second pressure value, or by comparing a first temperature value with a second temperature value, and limits the fault location to a small range with only one comparison.

[0131] In the description of this specification, the references to terms such as "an embodiment," "a specific embodiment," "some embodiments," "for example," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0132] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A highly shock-resistant, self-testing gas density relay, characterized in that, include: The gas density relay body, pointer, transmission rod, contact signal generator, calibration unit, first pressure sensor, second pressure sensor, first temperature sensor, second temperature sensor, intelligent control unit, and first locking pin, second locking pin, first counterweight, second counterweight, first spring, second spring and ring tooth component are disposed on the gas density relay body; The pointer of the gas density relay body is provided with a slide rail slot at each end; The transmission rod is connected to the contact signal generator and the pointer respectively. The rotation of the pointer triggers the contact signal generator to generate a contact closure signal or a contact reset signal. The verification unit is connected to the contact signal generator and the intelligent control unit to generate contact signals and transmit them to the intelligent control unit; the contact signals include: the contact closure signal or the contact reset signal and the density value collected by the verification unit from the gas density relay body when the contact closure signal is received; The intelligent control unit is connected to the first pressure sensor, the second pressure sensor, the first temperature sensor, and the second temperature sensor to receive monitoring results and perform fault detection based on the monitoring results and the contact signals. The first and second pins are respectively engaged in the corresponding slide rail slots; The first counterweight is disposed on the first chuck pin, and the second counterweight is disposed on the second chuck pin; One end of the first spring is fixed to the pointer, and the other end is connected to the first pin. One end of the second spring is fixed to the pointer, and the other end is connected to the second pin; The monitoring results include a first pressure value monitored by a first pressure sensor, a second pressure value monitored by a second pressure sensor, a first temperature value monitored by a first temperature sensor, and a second temperature value monitored by a second temperature sensor; the intelligent control unit includes: A density value acquisition unit is used to acquire a first density value based on the first pressure value and the first temperature value, and to acquire a second density value based on the second pressure value and the second temperature value; A density comparison unit is used to compare whether the difference between the first density value and the second density value exceeds a preset first threshold; if so, the first pressure sensor, the second pressure sensor, the first temperature sensor, or the second temperature sensor has malfunctioned. The first diagnostic module, when the first pressure sensor, the second pressure sensor, the first temperature sensor, and the second temperature sensor are not faulty, is used to determine whether the first density value and the second density value are both lower than a second threshold; if the first density value and the second density value are lower than the second threshold and the contact signal is not sent, then the gas density relay body is faulty; if the first density value and the second density value are both greater than the second threshold and the density value in the contact signal is less than the second threshold, then the gas density relay body is faulty. The second diagnostic module, when the first pressure sensor, the second pressure sensor, the first temperature sensor, or the second temperature sensor malfunctions, is used to determine whether the first density value or the second density value is lower than the second threshold. If the first density value is less than the second threshold, the second density value is greater than the second threshold, and the contact signal is not sent, then the first pressure sensor and / or the first temperature sensor malfunctions. If the first density value is less than the second threshold, the second density value is greater than the second threshold, and the density value in the contact signal is less than the second threshold, then the second pressure sensor and / or the second temperature sensor malfunctions. If the first density value is greater than the second threshold, the second density value is less than the second threshold, and the contact signal is not sent, then the second pressure sensor and / or the second temperature sensor malfunctions. If the first density value is greater than the second threshold, the second density value is less than the second threshold, and the density value in the contact signal is less than the second threshold, then the first pressure sensor and / or the first temperature sensor malfunctions.

2. The high shock-resistant, self-testing gas density relay according to claim 1, characterized in that, The intelligent control unit also includes: The first positioning submodule, when the first pressure sensor and / or the first temperature sensor malfunctions, is used to compare the first pressure value with the second pressure value and / or the first temperature value with the second temperature value; if the difference between the first pressure value and the second pressure value is greater than a preset third threshold, the first pressure sensor malfunctions; if the difference between the first pressure value and the second pressure value is less than the preset third threshold, the first temperature sensor malfunctions; if the difference between the first temperature value and the second temperature value is less than a preset fourth threshold, the first pressure sensor malfunctions; if the difference between the first temperature value and the second temperature value is greater than the preset fourth threshold, the first temperature sensor malfunctions. The second positioning submodule, when the second pressure sensor and / or the second temperature sensor malfunctions, is used to compare the first pressure value with the second pressure value and / or the first temperature value with the second temperature value; if the difference between the first pressure value and the second pressure value is greater than a preset third threshold, the second pressure sensor malfunctions; if the difference between the first pressure value and the second pressure value is less than the preset third threshold, the second temperature sensor malfunctions; if the difference between the first temperature value and the second temperature value is less than a preset fourth threshold, the second pressure sensor malfunctions; if the difference between the first temperature value and the second temperature value is greater than the preset fourth threshold, the second temperature sensor malfunctions.

3. The high shock-resistant, self-testing gas density relay according to claim 1, characterized in that, The intelligent control unit also includes: The pressure value comparison unit is used to compare the first pressure value with the second pressure value. If the difference between the first pressure value and the second pressure value is greater than a preset third threshold, then the first pressure sensor or the second pressure sensor is faulty. A temperature comparison unit is used to compare the first temperature value with the second temperature value; if the difference between the first temperature value and the second temperature value is greater than a preset fourth threshold, then the first temperature sensor or the second temperature sensor is faulty.

4. A self-testing method for a gas density relay, applied to the high shock-resistant, self-testing gas density relay according to any one of claims 1-3, characterized in that, include: Receives a first pressure value monitored by a first pressure sensor, a second pressure value monitored by a second pressure sensor, a first temperature value monitored by a first temperature sensor, and a second temperature value monitored by a second temperature sensor; The contact signal is acquired, including a contact closure signal or a contact reset signal and a density value collected from the gas density relay body when the verification unit receives the contact closure signal or the contact reset signal; Fault detection is performed based on the first pressure value, the second pressure value, the first temperature value, the second temperature value, and the contact signal acquisition results. The fault detection based on the first pressure value, the second pressure value, the first temperature value, the second temperature value, and the contact signal acquisition results includes: A first density value is obtained based on the first pressure value and the first temperature value, and a second density value is obtained based on the second pressure value and the second temperature value; Compare whether the difference between the first density value and the second density value exceeds a preset first threshold; if so, the first pressure sensor, the second pressure sensor, the first temperature sensor, or the second temperature sensor has malfunctioned. After comparing whether the difference between the first density value and the second density value exceeds a preset first threshold, the method further includes: When the first pressure sensor, the second pressure sensor, the first temperature sensor, and the second temperature sensor are not faulty, it is determined whether the first density value and the second density value are both lower than the second threshold. If the first density value and the second density value are lower than the second threshold and the contact signal is not sent, then the gas density relay body is faulty. If the first density value and the second density value are both greater than the second threshold and the density value in the contact signal is less than the second threshold, then the gas density relay body is faulty. When the first pressure sensor, the second pressure sensor, the first temperature sensor, or the second temperature sensor malfunctions, it is determined whether the first density value or the second density value is lower than the second threshold. If the first density value is lower than the second threshold, the second density value is greater than the second threshold, and the contact signal is not sent, then the first pressure sensor and / or the first temperature sensor malfunctions. If the first density value is lower than the second threshold, the second density value is greater than the second threshold, and the density value in the contact signal is less than the second threshold, then the second pressure sensor and / or the second temperature sensor malfunctions. If the first density value is greater than the second threshold, the second density value is less than the second threshold, and the contact signal is not sent, then the second pressure sensor and / or the second temperature sensor malfunctions. If the first density value is greater than the second threshold, the second density value is less than the second threshold, and the density value in the contact signal is less than the second threshold, then the first pressure sensor and / or the first temperature sensor malfunctions.

5. The gas density relay self-testing method according to claim 4, characterized in that, After determining whether the first density value or the second density value is lower than the second threshold, the method further includes: When the first pressure sensor and / or the first temperature sensor malfunctions, the first pressure value is compared with the second pressure value and / or the first temperature value is compared with the second temperature value. If the difference between the first pressure value and the second pressure value is greater than a preset third threshold, the first pressure sensor malfunctions. If the difference between the first pressure value and the second pressure value is less than the preset third threshold, the first temperature sensor malfunctions. If the difference between the first temperature value and the second temperature value is less than a preset fourth threshold, the first pressure sensor malfunctions. If the difference between the first temperature value and the second temperature value is greater than the preset fourth threshold, the first temperature sensor malfunctions. When the second pressure sensor and / or the second temperature sensor malfunctions, the first pressure value is compared with the second pressure value and / or the first temperature value is compared with the second temperature value. If the difference between the first pressure value and the second pressure value is greater than a preset third threshold, the second pressure sensor malfunctions. If the difference between the first pressure value and the second pressure value is less than the preset third threshold, the second temperature sensor malfunctions. If the difference between the first temperature value and the second temperature value is less than a preset fourth threshold, the second pressure sensor malfunctions. If the difference between the first temperature value and the second temperature value is greater than the preset fourth threshold, the second temperature sensor malfunctions.

6. The gas density relay self-testing method according to claim 4, characterized in that, The fault detection based on the first pressure value, the second pressure value, the first temperature value, the second temperature value, and the contact signal acquisition results also includes: Compare the first pressure value with the second pressure value. If the difference between the first pressure value and the second pressure value is greater than a preset third threshold, then the first pressure sensor or the second pressure sensor is faulty. Compare the first temperature value with the second temperature value; if the difference between the first temperature value and the second temperature value is greater than a preset fourth threshold, then the first temperature sensor or the second temperature sensor has malfunctioned.

Images