Intelligent gas density relay

Abstract

The application discloses an intelligent gas density relay, which comprises a main shell, a pressure detection assembly, a signal triggering assembly and a linkage assembly. The signal triggering assembly comprises a conduction connecting piece, a signal triggering rod, a conduction rod, a guide sleeve, an elastic piece and a guide plate. The signal triggering rod is slidably arranged on the guide plate. One end of the conduction rod is fixedly connected with the signal triggering rod, and the other end of the conduction rod is slidably inserted into the guide sleeve. The conduction connecting piece is fixed on the conduction rod and rotationally connected with the other end of a crank connecting rod shaft. The elastic piece is arranged in the guide sleeve and fixedly connected with the guide sleeve and the conduction rod at two ends. A cavity is formed between the conduction rod and the guide sleeve. The cavity is filled with damping medium. The crank connecting rod shaft is used for driving the conduction connecting piece to linearly move when the gear shaft rotates, so that the signal triggering rod is close to or away from a signal trigger. Through the damping medium and the elastic piece in the cavity, the vibration reduction effect can be achieved.

Description

Technical Field

[0001] This application relates to the field of relay technology, and in particular to an intelligent gas density relay. Background Technology

[0002] In electrical equipment within the power industry, high-voltage electrical equipment often contains a sealed sulfur hexafluoride (SF6) gas medium with arc-extinguishing and insulation functions. For this type of equipment, it is crucial to ensure that the gas chamber does not leak. If a gas leak occurs, the reduced gas density inside the equipment will affect its electrical performance and pose a serious threat to its safe operation. Therefore, it is necessary to monitor changes in the SF6 gas density within the gas chamber.

[0003] Currently, the common method for monitoring the density of sulfur hexafluoride (SF6) gas is to use SF6 gas density relays. Common gas density relays are remote-type, which achieve online monitoring of gas density by uploading data such as density, pressure, and temperature. However, the harsh operating environment of high-voltage substations, especially the high vibrations generated during system operation, can damage the internal mechanical structure or electronic components of remote-type density relays, thus affecting their detection accuracy. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide an intelligent gas density relay to solve the problem that existing gas density relays are easily affected by vibration, resulting in reduced measurement accuracy.

[0005] To achieve the above technical objectives, this application provides an intelligent gas density relay, comprising: a main housing, a pressure detection component, a signal triggering component, and a linkage component;

[0006] The pressure detection component, signal triggering component, and linkage component are all disposed within the main housing;

[0007] The linkage assembly includes: a linkage rod, a meshing plate, a gear shaft, and a crank connecting rod shaft;

[0008] The gear shaft is rotatably configured;

[0009] The meshing plate is rotatably configured, with one end meshing with the gear shaft and the other end having a sliding groove.

[0010] One end of the linkage rod is rotatable and can slide into the groove.

[0011] One end of the crank connecting rod shaft is connected to the gear shaft;

[0012] The pressure detection component includes: a Baden tube, a compensation plate, and a signal trigger;

[0013] The compensation piece is elastic and one end is connected to the other end of the linkage rod;

[0014] One end of the Baden tube is fixedly connected to the compensation plate, and the other end is sealed to the main housing;

[0015] The signal trigger is fixedly configured;

[0016] The signal triggering component includes: a conductive connector, a signal triggering rod, a conductive rod, a guide sleeve, an elastic element, and a guide plate;

[0017] Both the guide plate and the guide sleeve are fixedly installed;

[0018] The signal trigger rod is slidably mounted on the guide plate;

[0019] One end of the transmission rod is fixedly connected to the signal trigger rod, and the other end can slide into the guide sleeve;

[0020] The conductive connector is fixed to the conductive rod and rotatably connected to the other end of the crank connecting rod shaft;

[0021] The elastic element is disposed inside the guide sleeve, and its two ends are respectively fixedly connected to the guide sleeve and the transmission rod;

[0022] A cavity is formed between the conductive rod and the guide sleeve;

[0023] The cavity is filled with a damping medium;

[0024] The crank connecting rod shaft is used to drive the conductive connector to move linearly when the gear shaft rotates, so that the signal trigger rod moves closer to or further away from the signal trigger.

[0025] Furthermore, it also includes: an indicator component;

[0026] The indicating components include: a dial and a pointer;

[0027] The dial is disposed on the main housing;

[0028] The pointer is mounted on the dial and is fixedly connected to the gear shaft.

[0029] Furthermore, the linkage assembly also includes: a front plate, a middle plate, and a rear plate;

[0030] The front plate, middle plate, and rear plate are arranged in parallel intervals in a front-to-back manner.

[0031] The dial is arranged parallel to the front plate and is located at the front end of the front plate;

[0032] The front plate is fixedly connected to the middle plate via a first fixed shaft;

[0033] The middle plate is fixedly connected to the rear plate via a second fixed shaft;

[0034] The gear shaft is rotatably mounted on the front plate, middle plate, and rear plate.

[0035] Furthermore, the meshing plate is rotatably mounted on the first fixed shaft;

[0036] The crank connecting rod shaft is located at the rear end of the rear plate.

[0037] Furthermore, the damping medium includes one or more of air, nitrogen, and silicone oil.

[0038] Furthermore, the guide sleeve is provided with a through hole connecting the cavity to the outside.

[0039] Furthermore, it also includes associated electronic components and sub-housing;

[0040] The secondary housing is connected to the outside of the main housing;

[0041] The associated electronic components are disposed within the sub-housing, including: a communication module, a pressure sensor, and a control unit;

[0042] The air passage of the pressure sensor is connected to the Baden tube;

[0043] The control unit is electrically connected to the communication module, pressure sensor, and signal trigger.

[0044] Furthermore, a temperature sensor is also provided inside the main housing;

[0045] The temperature sensor is electrically connected to the control unit.

[0046] Furthermore, it also includes a self-verification component;

[0047] The self-calibration component includes: a solenoid valve, a pressure regulator, and a sampler;

[0048] One end of the solenoid valve is connected to the pressure regulator and the Baden tube, and the other end is connected to the relay connector;

[0049] The pressure regulator is used to regulate the air pressure inside the Baden tube;

[0050] The sampler is disposed within the sub-housing and is electrically connected to the signal trigger and the control unit.

[0051] Furthermore, the pressure regulator includes: a sleeve and an electric piston;

[0052] The sleeve is connected to one end of the Baden tube and the solenoid valve via an air passage;

[0053] The electric piston is slidably disposed within the sleeve.

[0054] As can be seen from the above technical solutions, this application provides an intelligent gas density relay, including: a main housing, a pressure detection component, a signal triggering component, and a linkage component; the signal triggering component includes: a conductive connector, a signal trigger rod, a conductive rod, a guide sleeve, an elastic element, and a guide plate; the guide plate and the guide sleeve are both fixedly installed; the signal trigger rod is slidably installed on the guide plate; one end of the conductive rod is fixedly connected to the signal trigger rod, and the other end can slide into the guide sleeve; the conductive connector is fixed to the conductive rod and rotatably connected to the other end of the crank connecting rod shaft; the elastic element is installed in the guide sleeve, and its two ends are respectively fixedly connected to the guide sleeve and the conductive rod; a cavity is formed between the conductive rod and the guide sleeve; the cavity is filled with a damping medium; the crank connecting rod shaft is used to drive the conductive connector to move linearly when the gear shaft rotates, so that the signal trigger rod moves closer to or further away from the signal trigger. When the gas density inside the main housing changes, causing the Baden tube to expand or contract, the linkage component drives the transmission rod to move linearly towards the signal trigger, thus triggering the signal trigger. At the same time, the damping medium and elastic element inside the cavity can reduce vibration, effectively solving the problem that existing gas density relays are easily affected by vibration, leading to a decrease in measurement accuracy. Attached Figure Description

[0055] 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.

[0056] Figure 1 A side view of the internal structure of an intelligent gas density relay provided in an embodiment of this application;

[0057] Figure 2 A front view of an intelligent gas density relay provided in an embodiment of this application;

[0058] Figure 3 A schematic diagram of a linkage component for an intelligent gas density relay provided in an embodiment of this application;

[0059] Figure 4 A schematic diagram of a signal triggering component for an intelligent gas density relay provided in an embodiment of this application;

[0060] Figure 5An enlarged view of the signal trigger rod position of an intelligent gas density relay provided in this application embodiment;

[0061] Figure 6 This is an internal structural diagram of an intelligent gas density relay when the gas pressure drops, provided as an embodiment of this application. Detailed Implementation

[0062] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection claimed in this application.

[0063] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0064] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a replaceable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0065] Please see Figures 1 to 6 The present application provides an intelligent gas density relay, which includes: a main housing 10, a pressure detection component 20, a signal triggering component 30, and a linkage component 40; the pressure detection component 20, the signal triggering component 30, and the linkage component 40 are all disposed inside the main housing 10.

[0066] The linkage assembly 40 includes: a linkage rod 41, a meshing plate 42, a gear shaft 43, and a crank connecting rod shaft 44; the gear shaft 43 is rotatably mounted; the meshing plate 42 is rotatably mounted, with one end meshing with the gear shaft 43 and the other end having a sliding groove 421; one end of the linkage rod 41 is rotatable and can slide into the sliding groove 421; one end of the crank connecting rod shaft 44 is connected to the gear shaft 43.

[0067] The pressure detection assembly 20 includes: a Baden tube 21, a compensation plate 22, and a signal trigger 23; the compensation plate 22 is elastic and one end is connected to the other end of the linkage rod 41; one end of the Baden tube 21 is fixedly connected to the compensation plate 22, and the other end is sealed to the main housing 10; the signal trigger 23 is fixedly installed.

[0068] The signal triggering assembly 30 includes: a conductive connector 31, a signal trigger rod 32, a conductive rod 33, a guide sleeve 34, an elastic element 35, and a guide plate 36; both the guide plate 36 and the guide sleeve 34 are fixedly installed; the signal trigger rod 32 is slidably installed on the guide plate 36; one end of the conductive rod 33 is fixedly connected to the signal trigger rod 32, and the other end can slide into the guide sleeve 34; the conductive connector 31 is fixed to the conductive rod 33 and rotatably connected to the other end of the crank connecting rod shaft 44; the elastic element 35 is installed in the guide sleeve 34, and both ends are fixedly connected to the guide sleeve 34 and the conductive rod 33 respectively; a cavity 37 is formed between the conductive rod 33 and the guide sleeve 34; the cavity 37 is filled with a damping medium; the crank connecting rod shaft 44 is used to drive the conductive connector 31 to move linearly when the gear shaft 43 rotates, so that the signal trigger rod 32 moves closer to or further away from the signal trigger 23.

[0069] Specifically, a sealed cavity is formed inside the main housing 10, and the cavity can be cylindrical. The Baden tubes 21 can be arranged in an arc shape. The main housing 10 contains a base 11, a support plate 12, and a partition plate 13. The Baden tubes 21 and the linkage assembly 40 can be mounted on the base 11 and located at the front end of the main housing 10. The compensation plate 22 can be U-shaped. Furthermore, the compensation plate 22 can be a temperature compensation plate.

[0070] In this scheme, when the density of sulfur hexafluoride gas inside the main housing 10 changes via the Baden tube 21 and the compensating plate 22, the gas pressure changes accordingly, causing the Baden tube 21 to undergo elastic deformation displacement, which is transmitted to the linkage assembly 40 through the compensating plate 22. That is, the Baden tube 21, following the elastic deformation of the gas pressure, can drive the linkage rod 41 to move. Then, the linkage rod 41 slides within the slide groove 421 and drives the meshing plate 42 to rotate. The rotating shaft 42 drives the gear shaft 43, which meshes with it, to rotate, and through the crank connecting rod shaft 44, drives the transmission rod 33 to move linearly. When the gas pressure change exceeds the preset range, the signal trigger rod 32 contacts the signal trigger 23, and through the signal trigger 23, transmits an alarm / lock contact signal to the back-end staff for timely maintenance, completing the function of the density relay outputting an alarm / lock contact signal, ensuring the safe operation of the electrical equipment.

[0071] In this embodiment, the width of the Baden tube 21 is designed to be 30mm. By increasing the width of the Baden tube 21, its transmission force is improved, which can effectively drive the signal trigger 23 to work. At the same time, by setting the elastic element 35 and the damping medium filled in the cavity 37, the vibration resistance of the signal trigger assembly 30 can be effectively improved.

[0072] It should be noted that the signal triggering component 30 is located at the rear end of the Baden tube 21 and can be mounted on the support plate 12 via the partition 13. The support plate 12 is mounted on the base 11.

[0073] In this embodiment, the signal trigger 23 is composed of a micro switch and its position is adjustable within a certain range on the partition 13. Specifically, the support plate 12 is provided with a signal adjuster 24; through the signal adjuster 24, the signal trigger 23 can be adjusted to a suitable position and then locked in place after it becomes loose.

[0074] Meanwhile, the micro switch on the signal trigger 23 can be disposed on the end face near the signal trigger rod 32, and this end face is inclined relative to the reciprocating motion direction of the signal trigger rod 32. The end face of the signal trigger rod 32 near the signal trigger 23 is set as an inclined surface.

[0075] In a more specific embodiment, it further includes: an indicator component 50; the indicator component 50 includes: a dial 51 and a pointer 52; the dial 51 is disposed on the main housing 10; the pointer 52 is disposed on the dial 51 and is fixedly connected to the gear shaft 43.

[0076] Specifically, as the gear shaft 43 rotates, it will drive the pointer 52 to rotate, thereby indicating the gas density value inside the main housing 10 on the dial 51.

[0077] In one embodiment, the crank-connecting rod shaft 44 comprises a rotating rod 441, a rotating shaft 442, a driven rod 443, and a connecting shaft 444. One end of the rotating rod 441 is fixedly connected to the gear shaft 43, and the other end is rotatably connected to one end of the driven rod 443 via the rotating shaft 442. The connecting shaft 444 is rotatably disposed at the other end of the driven rod 443 and is fixedly connected to the conductive connector 31.

[0078] Furthermore, the linkage assembly 40 also includes: a front plate 45, a middle plate 46, and a rear plate 47; the front plate 45, the middle plate 46, and the rear plate 47 are arranged in parallel front and rear intervals; the dial 51 is arranged parallel to the front plate 45 and is located at the front end of the front plate 45; the front plate 45 is fixedly connected to the middle plate 46 through a first fixed shaft 48; the middle plate 46 is fixedly connected to the rear plate 47 through a second fixed shaft 49; and the gear shaft 43 is rotatably mounted on the front plate 45, the middle plate 46, and the rear plate 47.

[0079] Furthermore, the meshing plate 42 is rotatably mounted on the first fixed shaft 48; the crank connecting rod shaft 44 is located at the rear end of the rear plate 47.

[0080] Specifically, by setting the front plate 45, the middle plate 46 and the rear plate 47, two installation spaces separated by the middle plate 46 can be formed, avoiding interference between the meshing plate 42 and other components during movement after installation.

[0081] In one embodiment, the damping medium includes one or more of air, nitrogen, and silicone oil.

[0082] Specifically, an air hole is provided at the end of the guide sleeve 34 away from the guide rod 33. The elastic element 34 can be a spring and is installed at the end of the guide sleeve 34 away from the guide rod 33. The air hole ensures that the guide rod 33 is not affected by local air or hydraulic pressure at the location of the elastic element 34 as it slides along the guide sleeve 34.

[0083] It should be noted that the cavity 37 formed between the transmission rod 33 and the guide sleeve 34 can be formed by setting the transmission rod 33 close to the guide sleeve 34 as a T-shape, and by using the end face flange to make clearance fit with the guide sleeve 34, while setting a certain pre-tightening force on the flange, thereby forming a sealed cavity 37 with a small clearance fit.

[0084] By selecting the type of damping medium, the damping value can be adjusted to achieve the high vibration resistance of the density relay.

[0085] Furthermore, the guide sleeve 34 is provided with a through hole 341 connecting the cavity 37 to the outside. The through hole 341 allows the damping medium to temporarily pass through, providing a buffering effect. Simultaneously, by adjusting the number and size of the through holes 341, the damping value adapted to the damping medium can be adjusted, achieving the high vibration resistance function of the density relay.

[0086] Further improvements include an associated electronic component 60 and a sub-housing 70; the sub-housing 70 is connected to the outside of the main housing 10; the associated electronic component 60 is disposed inside the sub-housing 70 and includes: a communication module 61, a pressure sensor 62, and a control unit 63; the air passage of the pressure sensor 62 is connected to the Baden tube 21; the control unit 63 is electrically connected to the communication module 61, the pressure sensor 62, and the signal trigger 23.

[0087] Specifically, after the signal trigger 23 triggers the signal, it sends the signal to the control unit 63. The control unit 63 then transmits the signal to an external control terminal via the communication module 61.

[0088] Furthermore, a temperature sensor 64 is also provided inside the main housing 10; the temperature sensor 64 is electrically connected to the control unit 63.

[0089] This allows for real-time monitoring of the temperature inside the main housing 10.

[0090] Furthermore, it also includes a self-calibration component 70; the self-calibration component 70 includes: a solenoid valve 71, a pressure regulator 72, and a sampler 73; one end of the solenoid valve 71 is connected to the pressure regulator 72 and the Baden tube 21, and the other end is connected to the relay connector 90; the pressure regulator 72 is used to regulate the air pressure inside the Baden tube 21; the sampler 73 is disposed in the sub-housing 70 and is electrically connected to the signal trigger 23 and the control unit 63.

[0091] When self-calibration is required, the connection between the relay connector 90, pressure regulator 72, and Baden tube 21 can be cut off via solenoid valve 5. Then, the gas pressure is reduced by pressure regulator 72, causing deformation of Baden tube 21. Control unit 63 receives the gas density relay alarm / lockout contact signal sent by signal trigger 23, as well as the pressure and temperature values ​​collected by pressure sensor 62 and temperature sensor 64. These values ​​are then converted to the corresponding pressure value (gas density value) at 20°C according to the gas pressure-temperature characteristics, and the alarm / lockout contact signal action value PJ of the gas density relay is detected. 20 And / or return value, to complete the online self-calibration of the gas density relay. The sampler 73 and control unit 63 can be arranged together; the temperature sensor 64 is located inside the main housing 10 as an accessory to the compensation component 22. The solenoid valve 71 and pressure regulator 72 are respectively sealed and located near the relay connector 90.

[0092] The self-calibration component 70 ensures reliable sealing of the density relay, preventing gas leakage and enabling long-term reliable operation in the field. It should be noted that during online self-calibration of the density relay, if the alarm / lockout contact signal is directly connected to the backend or secondary circuit without processing, the alarm / lockout contact activation signal will trigger a false alarm. To avoid this, the sampler 73 is designed with an alarm / lockout contact signal switching electrical circuit during online calibration. This electrical circuit can disconnect the signal between the density relay and the backend during automatic online calibration, keeping the backend signal in its normal operating state and preventing false alarms from the density relay during calibration. During calibration, the alarm / lockout contact signal connects the density relay's alarm / lockout contact signal to the control unit 63.

[0093] Furthermore, the pressure regulator 72 includes: a sleeve 721 and an electric piston 722; the sleeve 721 is connected to one end of the Baden tube 21 and the solenoid valve 71 via an air passage; the electric piston 722 is slidably disposed inside the sleeve 721.

[0094] In this embodiment, the control unit 63 can be: a general-purpose computer, industrial control computer, CPU, microcontroller, ARM chip, AI chip, quantum chip, photonic chip, MCU, FPGA, PLC, etc., industrial control motherboard, embedded main control board, etc. The control unit 63, electric piston 77 and solenoid valve 71 can all be connected to a power supply 80; wherein, the power supply 80 can be: a switching power supply, AC 220V, DC power supply, LDO, programmable power supply, solar power, storage battery, rechargeable battery, battery, etc.

[0095] Control unit 63 acquires pressure signal P through pressure sensor 62 and temperature signal T through temperature sensor 64. Using a mathematical model of the relationship between the pressure and temperature of sulfur hexafluoride gas, and employing a soft-sensor method, the control unit 63 processes the data to obtain the corresponding density value P. 20 (i.e., the pressure value P20 at 20℃). Furthermore, the density value P can be transmitted remotely via the communication module 61. 20 Pressure value P and temperature value T.

[0096] The online self-calibration working principle of this invention embodiment is as follows: When calibration is required, the relay issues a command, which can close the solenoid valve 71 through the control unit 63, thus isolating the gas density relay body from the SF6 electrical equipment in the gas circuit; then, the control unit 63 controls the pressure regulator 72, specifically controlling the movement of the electric piston 772, thereby completing the control of gas pressure rise and fall. When the gas pressure in the gas chamber of the pressure regulator 72 gradually decreases, the signal trigger 23 will trigger an alarm and / or lockout contact respectively. The alarm / lockout contact action signal is transmitted to the control unit 63 through the sampler 73. The control unit 63 detects the contact signal (alarm or lockout contact) action value PJ of the gas density relay body based on the density value when the alarm and / or lockout contact is activated. 20 The sampler 73, under the control of the control unit 63, restores the signal connection between the density relay alarm / lockout contact and the backend, thus maintaining the density relay alarm / lockout contact in normal working condition. This is done by checking the return value and completing the online automatic verification of the gas density relay body.

[0097] After completing the online automatic calibration of the gas density relay, the control unit 63 is preset with the standard contact signal value PBJ of the gas density relay. 20 The control unit 63 will transmit the action value PJD of the gas density relay alarm / lockout contact. 20 With standard contact signal value PBJ 20 Compare the signals to obtain the contact signal difference |PJD 20 -PBJ 20 |;If the contact signal difference is |PJD 20 -PBJ 20If the gas density relay's monitoring section operates within a preset threshold, it is in normal working condition; otherwise, it is in abnormal working condition. This means that the control unit 63 promptly acquires the current gas density relay alarm / lockout contact action signal value PJD. 20 The detected gas density relay alarm / lockout contact signal value PJD 20 Compare the contact signal value with the standard (rated parameters) requirement of the gas density relay PBJ20. If the consistency is good, it indicates that the gas density relay is working normally and requires no maintenance. That is, |PJD 20 -PBJ 20 If the gas density relay is within its allowable set value, it indicates that it is working normally and requires no maintenance. This invention uses a high degree of integration and cross-verification of mechanical and electronic monitoring to determine the performance status of the density relay.

[0098] The product of this invention features a novel design where the temperature sensor 64 and the compensation component 22 are integrated; or the temperature sensor 64 is directly mounted on the compensation component 22; or the temperature sensor 64 is positioned near the compensation component 22. This new design significantly improves performance and ensures good consistency between the remote signal and the on-site display.

[0099] The main housing 10 also has lead wires, through which the connection wire of the temperature sensor 64 is connected to the control unit 63. This solution may also include a device connection connector, which is located on the main body or the electronic part. The density relay outputs a contact signal through the signal trigger 23. The communication module 62 is located in the electronic part housing or the main body housing, or the communication module and the intelligent control unit are integrated into one design. The pressure sensor is located inside the electronic part housing or the main body housing. The control unit 63, based on a microprocessor-based embedded system with embedded algorithms and control programs, automatically controls the entire monitoring process, including all peripherals, logic, and input / output. The control unit 63, based on general-purpose computers, industrial control computers, ARM chips, AI chips, CPUs, MCUs, FPGAs, PLCs, industrial control motherboards, embedded main control boards, etc., with embedded algorithms and control programs, automatically controls the entire monitoring process, including all peripherals, logic, and input / output.

[0100] Control unit 63 acquires pressure and temperature signals from pressure and temperature sensors, and converts them into a pressure value P at 20°C based on gas characteristics. 20 (i.e., density value P) 20 The gas density relay can convert the measured pressure and temperature values ​​into a pressure value P corresponding to 20°C according to the gas characteristics. 20The gas density relay has pressure and temperature measurement and software conversion functions. The control unit 63 can measure relative and absolute pressure types of density relays. The gas density relay has human-machine interface functions: it has a data display interface that can refresh the current data value in real time; it has a data input function that can input parameter settings. The control unit 63 has an interface that can complete test data storage; and / or test data export; and / or test data printing; and / or data communication with a host computer; and / or input analog and digital information. The electrical interface of the density relay has a protection function, and misconnection will not cause interface damage. The control unit 63 also includes a communication module, which enables long-distance transmission of test data and / or results. The communication module 62 can be installed on the electronic housing or the mechanical housing. The communication method of the communication module can be wired or wireless. The electronic part is located on the back of the gas density relay body housing, on the housing, or on the equipment connection connector. A clock is also included, which is installed on the control unit 63 and can record the test time. The power supply 80 also includes a power supply circuit, a battery, a rechargeable battery, solar energy, power obtained from a current transformer, or an inductive power source. Control unit 63 can be controlled locally, remotely, or through a combination of both. The gas density relay displays real-time density, pressure, and temperature values, analyzes trends, queries historical data, and provides real-time alarms. It has a self-diagnostic function, promptly alerting to anomalies such as open circuits, short circuits, and sensor malfunctions. When the gas density relay detects an increasing trend in gas pressure, it should issue an anomaly alert. The gas density relay also includes a camera for monitoring itself. It incorporates protection against ambient temperature variations in electronic components, preventing operation at excessively low or high temperatures and ensuring operation within the allowable temperature range. A heater and / or radiator (fan) can be installed to activate the heater at low temperatures and the radiator (fan) at high temperatures, ensuring reliable operation of pressure sensors and / or integrated circuits in both low and high temperature environments. The gas density relay has data analysis and processing functions, enabling it to perform corresponding fault diagnosis and prediction for electrical equipment and the relay itself. The compensation component 22 is a U-shaped bimetallic strip.

[0101] The above are merely preferred embodiments of this application and are not intended to limit the present invention. Although this application has been described in detail with reference to examples, those skilled in the art can still modify the technical solutions described in the foregoing examples or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A smart gas density relay, characterized in that, include: Main housing (10), pressure detection assembly (20), signal triggering assembly (30) and linkage assembly (40); The pressure detection component (20), signal triggering component (30), and linkage component (40) are all disposed inside the main housing (10); The linkage assembly (40) includes: linkage rod (41), meshing plate (42), gear shaft (43) and crank connecting rod shaft (44). The gear shaft (43) is rotatably mounted; The meshing plate (42) is rotatably configured, with one end meshing with the gear shaft (43) and the other end having a sliding groove (421). One end of the linkage rod (41) is rotatable and can slide into the groove (421); One end of the crank connecting rod shaft (44) is connected to the gear shaft (43). The pressure detection component (20) includes: a Baden tube (21), a compensation plate (22), and a signal trigger (23); The compensation piece (22) is elastic and one end is connected to the other end of the linkage rod (41); One end of the Baden tube (21) is fixedly connected to the compensation plate (22), and the other end is sealed to the main housing (10). The signal trigger (23) is fixedly set; The signal triggering component (30) includes: a conductive connector (31), a signal triggering rod (32), a conductive rod (33), a guide sleeve (34), an elastic element (35), and a guide plate (36); Both the guide plate (36) and the guide sleeve (34) are fixedly installed; The signal trigger rod (32) is slidably mounted on the guide plate (36); One end of the transmission rod (33) is fixedly connected to the signal trigger rod (32), and the other end can slide into the guide sleeve (34); The conductive connector (31) is fixed to the conductive rod (33) and rotatably connected to the other end of the crank connecting rod shaft (44); The elastic element (35) is disposed inside the guide sleeve (34), and its two ends are respectively fixedly connected to the guide sleeve (34) and the transmission rod (33). A cavity (37) is formed between the conductive rod (33) and the guide sleeve (34). The cavity (37) is filled with a damping medium; The crank connecting rod shaft (44) is used to drive the transmission connector (31) to move linearly when the deformation of the compensation plate (22) drives the linkage rod (41) to move and the gear shaft (43) to rotate through the meshing plate (42), so that the signal trigger rod (32) moves closer to or further away from the signal trigger (23).

2. The intelligent gas density relay according to claim 1, characterized in that, Also includes: Indicator component (50); The indicating component (50) includes: a dial (51) and a pointer (52); The dial (51) is disposed on the main housing (10); The pointer (52) is located on the dial (51) and is fixedly connected to the gear shaft (43).

3. The intelligent gas density relay according to claim 2, characterized in that, The linkage component (40) also includes: a front plate (45), a middle plate (46) and a rear plate (47). The front plate (45), middle plate (46) and rear plate (47) are arranged in parallel intervals in front and behind; The dial (51) is arranged parallel to the front plate (45) and is located at the front end of the front plate (45); The front plate (45) is fixedly connected to the middle plate (46) via a first fixed shaft (48); The middle plate (46) is fixedly connected to the rear plate (47) via a second fixed shaft (49). The gear shaft (43) is rotatably mounted on the front plate (45), the middle plate (46) and the rear plate (47).

4. The intelligent gas density relay according to claim 3, characterized in that, The meshing plate (42) is rotatably mounted on the first fixed shaft (48); The crank connecting rod shaft (44) is located at the rear end of the rear plate (47).

5. The intelligent gas density relay according to claim 1, characterized in that, The damping medium includes one or more of air, nitrogen, and silicone oil.

6. The intelligent gas density relay according to claim 1, characterized in that, The guide sleeve (34) is provided with a through hole (341) connecting the cavity (37) to the outside.

7. The intelligent gas density relay according to claim 1, characterized in that, It also includes associated electronic components (60) and a sub-housing (70); The sub-shell (70) is connected to the outside of the main shell (10); The associated electronic component (60) is disposed within the sub-housing (70), and the associated electronic component (60) includes: a communication module (61), a pressure sensor (62), and a control unit (63). The air passage of the pressure sensor (62) is connected to the Baden tube (21); The control unit (63) is electrically connected to the communication module (61), the pressure sensor (62), and the signal trigger (23), respectively.

8. The intelligent gas density relay according to claim 7, characterized in that, A temperature sensor (64) is also provided inside the main housing (10). The temperature sensor (64) is electrically connected to the control unit (63).

9. The intelligent gas density relay according to claim 7, characterized in that, It also includes a self-verification component; The self-calibration component includes: a solenoid valve (71), a pressure regulator (72), and a sampler (73). One end of the solenoid valve (71) is connected to the pressure regulator (72) and the Baden tube (21), and the other end is connected to the relay connector (90). The pressure regulator (72) is used to regulate the air pressure inside the Baden tube (21); The sampler (73) is disposed inside the sub-housing (70) and is electrically connected to the signal trigger (23) and the control unit (63).

10. The intelligent gas density relay according to claim 9, characterized in that, The pressure regulator (72) includes: a sleeve (721) and an electric piston (722); The sleeve (721) is connected to one end of the Baden tube (21) and the solenoid valve (71) via an air passage; The electric piston (722) is slidably disposed within the sleeve (721).

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