An aviation plug for secondary connection line of relay protection device

Abstract

The present invention provides an aviation plug for a secondary connection line of a relay protection device, comprising a male connector and a female connector. A conductive pin in the male connector housing is connected to a cable and extends toward the female connector. A conductive socket, a cable lug, a trigger, and a signal monitoring circuit with a self-powered power supply are provided in the female connector housing, and an indicator light is provided on the outside of the housing. The conductive socket cooperates with the conductive pin and is hollow, tubular, with a notch at the distal end. The cable lug is fixed in the notch and connected to another cable. A trigger cover is provided above the corresponding notch. The indicator light is located near the conductive socket and is respectively connected to the normally closed contact of the trigger and the signal monitoring circuit. The signal monitoring circuit is connected to the male pin of the trigger to illuminate all the indicator lights. After the male and female connectors are aligned and installed, if one indicator light remains on, the male and female connectors are not properly installed; or if all the indicator lights are off, the male and female connectors are properly installed. The implementation of the present invention effectively monitors safety hazards such as looseness, poor contact, deformation, and open circuits online, thus avoiding power grid safety accidents.

Description

Technical Field

[0001] The invention relates to the technical field of relay protection, in particular to an aviation plug used on a secondary connecting line of a relay protection device. Background Art

[0002] The secondary wiring of relay protection devices utilizes "aviation plugs," enabling plug-and-play connection of secondary equipment. These plugs also offer advantages such as excellent environmental adaptability, secure connections, convenient and quick connection, and excellent electrical conductivity. However, when the pins and sockets inside the aviation plug housing become loose from the conductors inside the cable, poor contact is difficult to detect, and repair or replacement is impossible. This poses a safety hazard to the power grid and can cause accidents. For example, the aviation plug for the C-phase closing circuit entering the operating mechanism box of a switch at a power grid company's 500kV substation had a seven-core cable connector, but only four were compressed, leaving room for movement within the lug. Vibration from the switch during long-term operation could cause the cables inside the lug to loosen, ultimately creating a loose connection between the cable and lug. This, in turn, led to unreliable current flow in the closing circuit. This resulted in a power grid accident in which phase C could not be closed after the closing command was issued, leading to the malfunction of the three-phase inconsistency protection.

[0003] Currently, power grid companies fail to monitor the effectiveness of aviation plugs used in secondary lines of relay protection devices, which can easily lead to safety hazards such as looseness, poor contact, deformation, and open circuits. If these hazards are not promptly eliminated, they pose a significant threat to the safe and stable operation of the power grid. Summary of the Invention

[0004] The technical problem to be solved by the embodiments of the present invention is to provide an aviation plug for the secondary connection line of a relay protection device, which can effectively monitor safety hazards such as looseness, poor contact, deformation and open circuit online to avoid power grid safety accidents.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides an aviation plug for a secondary connection line of a relay protection device, comprising a male plug and a female plug that cooperate with each other; wherein,

[0006] The male connector housing is provided with a plurality of conductive pins; one end of each conductive pin is fixed in the male connector housing and connected to a corresponding wire in the cable away from the female connector through an external male connector outlet, and the other end is located outside the male connector housing and extends a certain length toward the female connector;

[0007] The female connector has a plurality of conductive sockets, a plurality of wire noses, a plurality of triggers and a signal monitoring circuit with its own power supply in the shell, and a plurality of indicator lights are provided outside the shell of the female connector; each conductive socket cooperates with a corresponding one of the plurality of conductive pins and is in the shape of a hollow tube, and a notch for installing a corresponding wire nose is provided on the end away from the male connector; each wire nose is fixed at the notch of a corresponding conductive socket, and the end away from the male connector is connected to the corresponding wire in the cable near the female connector through an external female connector outlet. connected; each trigger is fixed to the end surface of a corresponding conductive socket away from the male head and covered above the corresponding notch, including a contact point, a male pin, a normally closed contact and a normally open contact; each indicator light is arranged near each conductive socket, one end of which is connected to the normally closed contact of the trigger provided with the corresponding conductive socket, and the other end is connected to one end of the signal monitoring circuit; the other end of the signal monitoring circuit is connected to the male pins of all triggers, and can form a connected circuit with the connected triggers and corresponding indicator lights, thereby lighting up the indicator lights on all circuits;

[0008] Among them, after the male head and the female head are aligned and installed, if at least one indicator light is always on, it is determined that the male head and the female head are not installed properly; conversely, if all the indicator lights are always off, it is determined that the male head and the female head are installed properly.

[0009] Among them, the improper installation of the male connector and the female connector is caused by a conductive pin not pressing the touch point of the corresponding trigger in the corresponding conductive socket, so that the normally closed contact of the trigger that is not pressed keeps the connected indicator light and the signal monitoring circuit always connected.

[0010] Among them, the male connector and the female connector may be improperly installed, including looseness, poor contact, deformation and open circuit.

[0011] The male connector and the female connector are installed in place because all the conductive pins press against the touch points of the corresponding triggers in the corresponding conductive sockets, causing the normally closed contacts of the pressed triggers to disconnect the connection between the connected indicator lights and the signal monitoring circuit.

[0012] The plurality of conductive pins in the male connector are distributed in a staggered matrix arrangement.

[0013] Wherein, each of the wire noses is fixed at the notch of a corresponding conductive socket, and forms an angle of 60 degrees with the axial direction of the corresponding conductive socket.

[0014] Wherein, each line nose is made of metal copper.

[0015] Wherein, the signal monitoring circuit is also provided with a buzzer.

[0016] Wherein, the power supply of the signal monitoring circuit is a lithium battery.

[0017] Among them, the cables connected to the multiple conductive pins of the male connector and the cables connected to the multiple wire noses of the female connector are both large-logarithmic copper core cables.

[0018] The implementation of the embodiments of the present invention has the following beneficial effects:

[0019] After the male and female heads are aligned and installed, the present invention can judge whether the male and female heads are installed in place by quickly identifying whether the indicator light is always on, thereby effectively monitoring safety hazards such as looseness, poor contact, deformation and open circuit online to avoid power grid safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying any creative work, other drawings obtained based on these drawings still fall within the scope of the present invention.

[0021] Figure 1 A front cross-sectional view of an aviation plug for a secondary connection line of a relay protection device provided by an embodiment of the present invention before the male and female connectors are aligned and installed;

[0022] Figure 2 A top view of the male and female connectors of an aviation plug for a secondary connection line of a relay protection device provided by an embodiment of the present invention before alignment and installation;

[0023] Figure 3 A connection diagram of a single conductive pin in a corresponding conductive socket after the male and female connectors of an aviation plug for a secondary connection line of a relay protection device provided by an embodiment of the present invention are aligned and installed;

[0024] Figure 4 A structural diagram showing a micro switch trigger not being pressed down by a conductive pin in an application scenario of an aviation plug for a secondary connection line of a relay protection device provided by an embodiment of the present invention;

[0025] Figure 5 A structural diagram of an aviation plug for a secondary connection line of a relay protection device provided by an embodiment of the present invention, wherein the trigger is a micro switch and is pressed by a conductive pin;

[0026] Figure 6A logical diagram of the connection loop between a signal monitoring circuit, an indicator light, and a trigger in an application scenario of an aviation plug on a secondary connection line of a relay protection device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings.

[0028] like Figures 1 to 3 As shown in the figure, an aviation plug for the secondary connection line of a relay protection device is proposed in an embodiment of the present invention, comprising a male plug 1 and a female plug 2 that cooperate with each other; wherein,

[0029] The housing of the male connector 1 is provided with a plurality of conductive pins 11. Each conductive pin 11 is made of a conductive metal (e.g., copper). One end of each conductive pin 11 is fixed in the housing of the male connector and connected to a corresponding conductor in a cable (e.g., a large-pair copper-core cable) away from the female connector 2 via an external male connector lead L1. The other end of each conductive pin 11 is located outside the housing of the male connector and extends a certain distance toward the female connector 2.

[0030] The housing of the female connector 2 is provided with a plurality of conductive sockets 21, a plurality of wire noses 22, a plurality of triggers 23 and a signal monitoring circuit 24 with its own power supply (such as a button-type lithium battery), and the housing of the female connector 2 is provided with a plurality of indicator lights 25; each conductive socket 21 is matched with a corresponding one of the plurality of conductive pins 11 and is in the shape of a hollow tube, and they are all made of conductive metal (such as copper), and a notch 211 for installing a corresponding wire nose 22 is provided on the end away from the male connector 1; each wire nose 22 is made of conductive metal (such as copper), which is fixed at the notch 211 of the corresponding conductive socket 21, and the end away from the male connector 1 is connected to the adjacent female connector through an external female connector outlet line L2. The corresponding wires in the cable near the female connector 2 (e.g., another large-logarithmic copper-core cable) are connected; each trigger 23 is fixed to the end surface of the corresponding conductive socket 21 away from the male connector 1 and is covered above the corresponding notch 211, including a contact point, a male pin, a normally closed contact, and a normally open contact; each indicator light 25 is provided near each conductive socket 21, one end of which is connected to the normally closed contact of the trigger 23 provided in the corresponding conductive socket 21, and the other end is connected to one end of the signal monitoring circuit 24; the other end of the signal monitoring circuit 24 is connected to the male pins of all triggers 23, and can form a connected circuit with the connected trigger 23 and the corresponding indicator light 25, thereby lighting up the indicator lights 25 on all circuits;

[0031] Among them, after the male connector 1 and the female connector 2 are aligned and installed, if at least one indicator light 25 is always on, it is determined that the male connector 1 and the female connector 2 are not installed properly, including looseness, poor contact, deformation and open circuit; conversely, if all indicator lights 25 are always off, it is determined that the male connector 1 and the female connector 2 are installed properly.

[0032] It should be noted that improper installation of the male connector 1 and the female connector 2 occurs when a conductive pin 11 fails to press against the contact point of the corresponding trigger 23 in the corresponding conductive socket 21, causing the normally closed contact of the unpressed trigger 23 to maintain connection between the connected indicator light 25 and the signal monitoring circuit 24. Conversely, proper installation of the male connector 1 and the female connector 2 occurs when all conductive pins 11 press against the contact points of the corresponding trigger 23 in the corresponding conductive socket 21, causing the normally closed contact of the pressed trigger 23 to disconnect the connected indicator light 25 from the signal monitoring circuit 24.

[0033] It is understood that the signal monitoring circuit is also equipped with a buzzer, which sounds an alarm to indicate that the male connector 1 and the female connector 2 are not properly installed. The buzzer can be triggered by a time delay trigger, and its triggering condition is that the indicator light 25 lights up after the male connector 1 and the female connector 2 are properly installed. The specific design method is a common technical means in this field and will not be repeated here.

[0034] In one example, the male connector 1 has a cylindrical housing with a recessed groove extending from the top to the bottom. The bottom wall of the recess features multiple through-holes arranged in a staggered matrix. Each conductive pin 11 is threadedly secured within a corresponding through-hole in a staggered matrix arrangement. Each pin is connected to a corresponding conductor within a multi-pair copper cable located away from the female connector 2 via a male lead L1.

[0035] At the same time, the shell of the female plug 2 is columnar, and a boss is formed on the end face corresponding to the male plug 1, which matches the groove of the male plug 1. A plurality of through holes are also provided on the boss, which are distributed in an interlaced matrix and correspond to the through holes on the male plug 1, so that all conductive pins 11 can be inserted into the corresponding conductive sockets 21.

[0036] At this time, each conductive socket 21 is embedded in a corresponding through hole opened in the female connector 2 by means of a thread, and a wire nose 22 is fixed at the notch 211 by welding, so that the wire nose 22 forms a 60-degree angle with the axial direction of the corresponding conductive socket 21.

[0037] Each trigger 23 is a micro switch (such as Figure 4 and Figure 5(as shown), it is fixed to the end surface of the corresponding conductive socket 21 away from the male connector 1 and covers the corresponding notch 211. Its contact point is positioned toward the inside of the conductive socket 21, thereby quickly determining the insertion position of the conductive pin 11 into the corresponding conductive socket 21. It should be noted that when the trigger 23 is a micro switch, including a contact point, a hook, a spring, a movable reed, a male pin, a normally closed contact, and a normally open contact, its corresponding operating principles are well known to those skilled in the art and will not be further described here.

[0038] The signal monitoring circuit 24 includes a button-type lithium battery and a series resistor, one end of which is connected to the male pins of all triggers 23, and the other end is connected to each indicator light 25 and connected to the normally closed contacts of all triggers 23 through each indicator light 25, so that after the signal monitoring circuit 24 forms a connected loop with the connected trigger 23 and the corresponding indicator light 25, all the indicator lights 25 on the loop are lit. The specific connection relationship of the loop is as follows: Figure 6 shown.

[0039] Each indicator light 25 is installed near a corresponding conductive socket 21 and is located outside the housing of the female connector 2, which is convenient for status observation to identify whether the conductive pin 11 is properly installed in the corresponding conductive socket 21.

[0040] Before the male connector 1 and the female connector 2 are aligned and installed, after the signal monitoring circuit 24 forms a connected loop with the connected trigger 23 and the corresponding indicator light 25, all the indicator lights 25 on the loop are lit.

[0041] After the male connector 1 and the female connector 2 are aligned and installed, the conductive pin 11 presses against the contact point of the corresponding trigger 23 in the corresponding conductive socket 21, causing the normally closed contact of the pressed trigger 23 to disconnect the connected indicator light 25 from the signal monitoring circuit 24, thereby extinguishing the indicator lights 25 on all circuits. This indicates that the male connector 1 and the female connector 2 are not properly installed. Of course, if a conductive pin 11 does not press against the contact point of the corresponding trigger 23 in the corresponding conductive socket 21, causing the normally closed contact of the unpressed trigger 23 to maintain the connected indicator light 25 and the signal monitoring circuit 24, and the corresponding indicator lights 25 are all lit, then the male connector 1 and the female connector 2 are not properly installed.

[0042] It can be seen that whether the male and female heads are properly installed can be determined by quickly identifying whether the indicator light 25 is always on, so that safety hazards such as looseness, poor contact, deformation and open circuit can be effectively monitored online.

[0043] In an embodiment of the present invention, a method for using an aviation plug on a secondary connection line of a relay protection device is as follows:

[0044] Phase 1: Before the male connector 1 and the female connector 2 are aligned and installed, all the indicator lights 25 on the female connector 2 are lit;

[0045] The second stage: After the male connector 1 and the female connector 2 are aligned and installed, if all the indicator lights 25 on the female connector 2 are off, it is quickly determined that the male connector 1 and the female connector 2 are installed in place; if at least one indicator light 25 on the female connector 2 remains lit, it is quickly determined that the male connector 1 and the female connector 2 are not installed in place, and the conductive pin 11 in the conductive socket 21 corresponding to the indicator light 25 that remains lit has not been inserted into place, or there are safety hazards such as looseness, poor contact, deformation and open circuit.

[0046] Phase 3: After confirming that the male connector 1 and the female connector 2 are properly installed, if at least one indicator light 25 of the female connector 2 suddenly lights up during operation for a period of time or for a long time, it is quickly determined that there is a problem between the male connector 1 and the female connector 2, and the conductive pin 11 in the conductive socket 21 corresponding to the lit indicator light 25 has safety hazards such as looseness, poor contact, deformation and open circuit.

[0047] The implementation of the embodiments of the present invention has the following beneficial effects:

[0048] After the male and female heads are aligned and installed, the present invention can judge whether the male and female heads are installed in place by quickly identifying whether the indicator light is always on, thereby effectively monitoring safety hazards such as looseness, poor contact, deformation and open circuit online to avoid power grid safety accidents.

[0049] The above disclosure is merely a preferred embodiment of the present invention and certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. An aviation plug for the secondary connection line of a relay protection device, characterized in that: It includes male and female connectors that fit together; The male connector housing is provided with a plurality of conductive pins; one end of each conductive pin is fixed in the male connector housing and connected to a corresponding wire in the cable away from the female connector through an external male connector outlet, and the other end is located outside the male connector housing and extends a certain length toward the female connector; The female connector has a plurality of conductive sockets, a plurality of wire noses, a plurality of triggers and a signal monitoring circuit with its own power supply in the shell, and a plurality of indicator lights are provided outside the shell of the female connector; each conductive socket cooperates with a corresponding one of the plurality of conductive pins and is in the shape of a hollow tube, and a notch for installing a corresponding wire nose is provided on the end away from the male connector; each wire nose is fixed at the notch of a corresponding conductive socket, and the end away from the male connector is connected to the corresponding wire in the cable near the female connector through an external female connector outlet. connected; each trigger is fixed to the end surface of a corresponding conductive socket away from the male head and covered above the corresponding notch, including a contact point, a male pin, a normally closed contact and a normally open contact; each indicator light is arranged near each conductive socket, one end of which is connected to the normally closed contact of the trigger provided with the corresponding conductive socket, and the other end is connected to one end of the signal monitoring circuit; the other end of the signal monitoring circuit is connected to the male pins of all triggers, and can form a connected circuit with the connected triggers and corresponding indicator lights, thereby lighting up the indicator lights on all circuits; After the male connector and the female connector are aligned and installed, if at least one indicator light is always on, it is determined that the male connector and the female connector are not properly installed; conversely, if all the indicator lights are always off, it is determined that the male connector and the female connector are properly installed; The improper installation of the male connector and the female connector is caused by a conductive pin not pressing against a contact point of a corresponding trigger in a corresponding conductive socket, so that the normally closed contact of the trigger not pressed maintains the connected indicator light and the signal monitoring circuit in constant connection; The male connector and the female connector are installed in place because all the conductive pins press against the touch points of the corresponding triggers in the corresponding conductive sockets, causing the normally closed contacts of the pressed triggers to disconnect the connection between the connected indicator lights and the signal monitoring circuit.

2. The aviation plug for the secondary connection line of the relay protection device according to claim 1, characterized in that: The male connector and the female connector may be improperly installed, including looseness, poor contact, deformation, and open circuit.

3. The aviation plug for the secondary connection line of the relay protection device according to claim 1, characterized in that: The plurality of conductive pins in the male connector are distributed in a staggered matrix arrangement.

4. The aviation plug for the secondary connection line of the relay protection device according to claim 1, characterized in that: Each of the wire noses is fixed at the notch of a corresponding conductive socket, and forms an angle of 60 degrees with the axial direction of the corresponding conductive socket.

5. The aviation plug for the secondary connection line of the relay protection device according to claim 4, characterized in that: Each of the wire noses is made of metal copper.

6. The aviation plug for the secondary connection line of the relay protection device according to claim 1, characterized in that: The signal monitoring circuit is also provided with a buzzer.

7. The aviation plug for the secondary connection line of the relay protection device according to claim 1, characterized in that: The power source of the signal monitoring circuit is a lithium battery.

8. The aviation plug for the secondary connection line of the relay protection device according to claim 1, characterized in that: The cables connected to the multiple conductive pins of the male connector and the cables connected to the multiple wire noses of the female connector are both large-logarithmic copper core cables.

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