CN112185762B - Relay device - Google Patents
Relay device Download PDFInfo
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- CN112185762B CN112185762B CN202011146431.0A CN202011146431A CN112185762B CN 112185762 B CN112185762 B CN 112185762B CN 202011146431 A CN202011146431 A CN 202011146431A CN 112185762 B CN112185762 B CN 112185762B
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- Prior art keywords
- relay
- coil
- relay body
- circuit
- moisture
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/02—Bases; Casings; Covers
- H01H50/023—Details concerning sealing, e.g. sealing casing with resin
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/14—Terminal arrangements
Abstract
The present application relates to a relay device; the moistureproof sealing shell comprises a moistureproof cover, a moistureproof sealing cover and a moistureproof base, wherein the moistureproof cover, the moistureproof sealing cover and the moistureproof base form a closed cavity; wherein, the moisture-proof base is provided with an electric connection plug-in unit and a wiring terminal; the electrical connection plug-in is used for connecting the relay body and the moisture-proof base in the closed cavity; the wiring terminal is used for connecting the relay body with other external electrical equipment; the upper part of the relay body is sealed by a moisture-proof cover; the upper part of the wiring terminal is sealed by a moisture-proof sealing cover; the moistureproof sealing cover is provided with an inlet and outlet hole through which connecting wires between the relay body and other external electrical equipment enter and exit; the relay device can avoid misoperation caused by insulation performance reduction due to the fact that the relay body contacts with the external environment to be wetted, and therefore the safety and reliability of the electric power automation system are improved.
Description
Technical Field
The application relates to the technical field of power systems, in particular to a relay device.
Background
With the rapid development of the power system, the power transmission and transformation and distribution network system can use various indoor and outdoor operating mechanism boxes, terminal boxes, distribution network cabinets and other equipment to realize the automation of the power system.
The relay can be used for normal operation of the indoor and outdoor operating mechanism box, the terminal box, the distribution network cabinet and other equipment, for example, an operation device can be provided for remote operation by using the extension of the contact of the outlet relay and the restarting relay. In general, the traditional relay in the power system adopts an electromagnetic single-coil intermediate relay to realize the outlet operation and the contact heavy action, but the traditional relay is easy to generate reverse surge during operation, the contact and the coil can easily cause relay misoperation due to creepage and the like, and the coil of the relay can cause relay refusal action due to corrosion and mould breaking, so that hidden danger is left for remote operation of the relay.
Therefore, the conventional relay easily affects the safety and reliability of the electric power automation system when operated.
Disclosure of Invention
In view of the above, it is desirable to provide a relay device capable of improving safety and reliability in operation of the relay.
The relay device comprises a dampproof sealing shell, wherein the dampproof sealing shell comprises a dampproof cover, a dampproof sealing cover and a dampproof base, which form a closed cavity;
an electrical connection plug-in and a wiring terminal are arranged on the moistureproof base; the electrical connection plug-in is used for connecting the relay body and the moisture-proof base in the closed cavity; the wiring terminal is used for connecting external electrical equipment;
The upper part of the relay body is sealed by a moisture-proof cover; the upper part of the wiring terminal is sealed by a moisture-proof sealing cover;
the moistureproof sealing cover is provided with an inlet and outlet hole through which a connecting wire between the wiring terminal and external electrical equipment passes.
In one embodiment, the moisture resistant seal housing further comprises a seal ring; the sealing ring is arranged among the moistureproof base, the moistureproof cover and the moistureproof sealing cover, and is embedded into the sealing groove of the moistureproof base;
the sealing ring is used for sealing the connecting gap among the dampproof sealing shell, the dampproof cover and the dampproof base.
In one embodiment, the moisture-tight seal housing further comprises an in-out moisture-tight seal; the wire inlet and outlet moistureproof sealing element is arranged in the wire inlet and outlet hole;
the wire inlet and outlet dampproof sealing piece is used for sealing a wire inlet and outlet hole on the dampproof sealing cover and a gap between connecting wires for connecting the wire inlet and outlet dampproof sealing cover and the connecting wires of external electrical equipment.
In one embodiment, an action signal lamp is arranged in the moistureproof sealing shell; the action signal lamp is used for displaying the working state of the relay.
In one embodiment, the relay device further comprises a contact vacuum housing; the metal terminals of the coil circuit of the relay body and the metal terminals of the contacts of the relay body penetrate out of the contact vacuum shell;
And the contact vacuum shell is used for sealing the coil circuit and the contacts of the relay body.
In one embodiment, the contact vacuum housing is disposed within the moisture-tight sealed housing, and the electrical metal portion of the contact vacuum housing is connected to an electrical metal appliance on the moisture-tight base of the moisture-tight sealed housing.
In one embodiment, the relay device further comprises a reverse isolation circuit and a quick release circuit;
the quick release circuit is connected with the coil circuit of the relay body in parallel; the reverse isolation circuit is connected with the relay body in series;
the quick release circuit is used for releasing reverse electromotive force generated when the coil circuit of the relay body is in power failure; the reverse isolation circuit is used for isolating interference signals generated by the quick release circuit.
In one embodiment, the fast bleeder circuit and the reverse isolation circuit each comprise a diode;
the positive electrode of the diode in the rapid release circuit is connected with the negative electrode of the coil circuit of the relay body; the cathode of the diode is connected with the anode of the coil circuit of the relay body;
the negative electrode of the diode in the reverse isolation circuit is connected with the positive electrode of the coil circuit of the relay body; the anode of the diode is connected with the cathode of the power circuit.
In one embodiment, the relay device further comprises a backup start coil; the backup starting coil and the body coil of the relay body have the same function;
the backup starting coil is used for performing normal work when the body coil of the relay body is in refusal action.
In one embodiment, the backup start coils include at least one set of backup start coils, and each set of backup start coils is connected in parallel with the body coil of the relay body.
The relay device provided by the embodiment of the application comprises a dampproof sealing shell, wherein the dampproof sealing shell comprises a dampproof cover, a dampproof sealing cover and a dampproof base, wherein the dampproof cover, the dampproof sealing cover and the dampproof base form a closed cavity; wherein, the moisture-proof base is provided with an electric connection plug-in unit and a wiring terminal; the electrical connection plug-in is used for connecting the relay body and the moisture-proof base in the closed cavity; the wiring terminal is used for connecting the relay body with other external electrical equipment; the upper part of the relay body is sealed by a moisture-proof cover; the upper part of the wiring terminal is sealed by a moisture-proof sealing cover; the moistureproof sealing cover is provided with an inlet and outlet hole through which connecting wires between the relay body and other external electrical equipment enter and exit; because the relay body is sealed in the sealed cavity formed by the dampproof cover, the dampproof sealing shell and the dampproof base, the relay body is isolated from the external environment, thereby avoiding malfunction caused by insulation performance reduction due to the contact of the relay body with the external environment, and improving the safety and reliability of the electric power automation system. In addition, in the closed cavity, the relay body is connected with the electric connection plug-in unit arranged on the dampproof base, and the wiring terminal connected with the external electric equipment is also arranged on the dampproof base, so that the relay body can be controlled to be connected with the external electric equipment on the wiring terminal after being connected with the electric connection plug-in unit, and the relay body is ensured not to be wetted by contacting with the external environment, and meanwhile the relay can be ensured to normally control the external electric equipment to work, so that the reliability of the electric power automation system is further ensured.
Drawings
FIG. 1 is an exploded view of portions of a moisture tight sealed housing of a relay device in one embodiment;
FIG. 2 is a block diagram of a moisture tight seal housing of a relay device in one embodiment;
FIG. 3 is a block diagram of a vacuum sealed housing of a relay apparatus in one embodiment;
FIG. 4 is a block diagram of a moisture tight seal housing of a relay device in one embodiment;
FIG. 5 is a block diagram of a moisture tight seal housing of a relay device in one embodiment;
FIG. 6 is a diagram of a contact vacuum housing of a relay device in one embodiment;
FIG. 7 is a cross-sectional view of a contact vacuum housing in one embodiment;
FIG. 8 is a block diagram of a backup start coil of a relay device in one embodiment;
FIG. 9 is a block diagram of a configuration of multiple backup start coils of a relay device in one embodiment;
FIG. 10 is a block diagram of a relay device in one embodiment;
FIG. 11 is a block diagram of a relay device in one embodiment;
fig. 12 is a block diagram of a relay device in one embodiment.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
The numbering of the components itself, e.g. "first", "second", etc., in the present application is used only to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated. In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
At present, the traditional relay in the electric power system is easy to be wet in practical application, and misoperation is caused by switching surge voltage possibly generated during startup and shutdown in a coil circuit, corrosion caused by the fact that the relay coil is easy to be wet, and phenomenon of refusing to operate due to mould breaking occur, so that hidden danger is left for remote operation, and the safety and reliability of an automatic system are seriously affected. Based on this, the following embodiments of the present application provide a relay device that can solve the above-described technical problems. The following describes embodiments of the present application in detail.
Fig. 1 is an exploded view of the various parts of a moisture tight enclosure of a relay device according to one embodiment of the present application. As shown in fig. 1, the moisture-proof sealing case of the relay device includes a moisture-proof cover 111, a moisture-proof sealing cover 112, and a moisture-proof base 113 that constitute a closed cavity; the moisture-proof base is provided with an electrical connection plug-in 114 and a wiring terminal 115; the electrical connection plug 114 is used for connecting the relay body with the moisture-proof base 113 in the closed cavity; the connection terminal 115 is used for connecting an external electric device; the upper part of the relay body is closed by a moisture-proof cover 111; the upper part of the wiring terminal 115 is closed by a moisture-proof sealing cover 112; the moisture-proof sealing cover 112 is provided with an inlet and outlet hole 116, and a connecting wire between the connecting terminal 115 and external electrical equipment enters and exits through the inlet and outlet hole 116.
In the embodiment of the application, the dampproof sealing shell is used for integrally sealing the electric connection plug-in units and the wiring terminals arranged on the relay body and the dampproof base into a sealing cavity formed by the dampproof cover, the dampproof sealing cover and the dampproof base so as to prevent the relay body, the electric connection plug-in units and the wiring terminals from being wetted. The moisture-proof cover, the moisture-proof sealing cover and the moisture-proof base can be connected into a closed cavity through welding, for example, welding modes such as fusion welding, pressure welding and ultrasonic wave can be adopted, and the embodiment of the application is not limited to the sealing cavity. The overall appearance shape of the moistureproof sealing shell can be a convex structure shown in figure 2 after the moistureproof cover, the moistureproof sealing cover and the moistureproof base are connected together. Of course, in practical application, the overall appearance shape of the moisture-proof sealing shell can also be a cuboid structure as shown in fig. 3 formed by a moisture-proof cover, a moisture-proof sealing cover and a moisture-proof base, or other structures, which can be adjusted according to the actual size and shape of the relay body, and the shape of the moisture-proof sealing shell is not limited in the embodiment of the application.
It is to be understood that the relays used in the embodiments of the present application include, but are not limited to, electromagnetic relays, solid state relays, reed relays, and the like.
The upper parts of the relay body and the electric connection plug-in units connected with the relay body are sealed by the moisture-proof cover, and the electric connection plug-in units are arranged on the moisture-proof base, so that the relay body and the electric connection plug-in units are jointly sealed in a sealed cavity formed by the moisture-proof cover and the moisture-proof base after the relay body is connected with the electric connection plug-in units. Alternatively, the moisture barrier cover is a translucent material, which may be, for example, a liquid photosensitive resin material or a Low Density Polyethylene (LDPE) material, etc., without limitation in embodiments of the present application. The upper parts of the relay body and the electric connection plug-in units connected with the relay body are sealed by the moistureproof cover, so that the relay body and the electric connection plug-in units connected with the relay body are prevented from being in contact with the external environment to be wetted, the insulation performance is reduced, the reliability and the conductivity of the conductive path are improved, and meanwhile, the elasticity and the plugging life of the plug-in units are improved.
Wherein, the electrical connection plug-in components that are equipped with on the dampproofing base are used for connecting the relay body to and the binding post that is equipped with is used for connecting outside electrical equipment. It can be seen from fig. 1 that the electrical connection plug-in units and the connection terminals on the moisture-proof base are disposed in different areas of the moisture-proof base, in order to ensure that the relay body is normally connected with the external electrical equipment through the connection terminals, the normal connection between the relay body and the external electrical equipment can be realized by disposing a circuit module in the moisture-proof base, and for the realization mode of the circuit module, the realization mode of the circuit module can be realized by adopting the existing circuit structure or through the wire connection mode, etc., which is not limited by the embodiment of the application. The relay body can normally open and close the external electrical equipment only under the premise that the relay body is normally connected with the external electrical equipment through the wiring terminal.
Alternatively, in one embodiment, the electrical connection insert and terminal block may be formed in one piece from bakelite material and welded to the moisture resistant base; the welding positions of the electrical connection plug-in and the wiring terminal are not particularly limited, for example, the electrical connection plug-in shown in fig. 1 may be arranged in the middle of the dampproof base, the wiring terminal may be arranged at two ends of the dampproof base, the electrical connection plug-in and the wiring terminal may be arranged in parallel, the electrical connection plug-in may be arranged at the left side of the dampproof base, the wiring terminal may be arranged at the right side of the dampproof base, and the like, and may be determined according to practical situations. Wherein, the welding can adopt ultrasonic welding or electric welding, and the embodiment of the application is not limited to the ultrasonic welding or the electric welding.
The upper part of the wiring terminal is sealed by the moisture-proof sealing cover, and the wiring terminal is arranged on the moisture-proof base, so that the wiring terminal is sealed in a sealing cavity formed by the moisture-proof sealing cover and the moisture-proof base. And the moisture-proof sealing cover is provided with an inlet and outlet hole through which a connecting wire connected with the wiring terminal passes in and out. As mentioned above, although the connection wire on the connection terminal is connected to the external electric device after being protruded out of the moisture-proof sealing cover through the wire inlet and outlet hole, the connection terminal has a connection relationship with the electric connection plug-in inside the moisture-proof base, so that the main function is to connect other external electric devices and the relay body. Because the upper portion of binding post is sealed by dampproofing sealed lid to avoid binding post and external environment contact to wet, improved binding post's plug elasticity and plug life.
The external electrical devices mentioned above refer to electrical devices that need to be controlled by a relay, including but not limited to contactors, capacitors, motors, and the like, among devices such as indoor and outdoor operation mechanism boxes, terminal boxes, distribution network cabinets, and the like in an electrical power system.
The relay device provided by the embodiment of the application comprises a dampproof sealing shell, wherein the dampproof sealing shell comprises a dampproof cover, a dampproof sealing cover and a dampproof base, which form a closed cavity; wherein, the moisture-proof base is provided with an electric connection plug-in unit and a wiring terminal; the electrical connection plug-in is used for connecting the relay body and the moisture-proof base in the closed cavity; the wiring terminal is used for connecting the relay body with other external electrical equipment; the upper part of the relay body is sealed by a moisture-proof cover; the upper part of the wiring terminal is sealed by a moisture-proof sealing cover; and the moisture-proof sealing cover is provided with an inlet and outlet hole through which a connecting wire between the relay body and other external electrical equipment passes. In the embodiment of the application, the relay body is sealed in the sealed cavity formed by the moistureproof cover, the moistureproof sealing shell and the moistureproof base, so that the relay body is isolated from the external environment, and misoperation caused by insulation performance reduction due to the fact that the relay body contacts with the external environment is damped is avoided, and the safety and reliability of the electric power automation system are improved. In addition, in the closed cavity, the relay body is connected with the electric connection plug-in unit arranged on the dampproof base, and the wiring terminal connected with the external electric equipment is also arranged on the dampproof base, so that the relay body can be controlled to be connected with the external electric equipment on the wiring terminal after being connected with the electric connection plug-in unit, and the relay body is ensured not to be wetted by contacting with the external environment, and meanwhile the relay can be ensured to normally control the external electric equipment to work, so that the reliability of the electric power automation system is further ensured.
On the basis of the embodiment, the application also provides a relay device, as shown in fig. 4, the moisture-proof sealing shell also comprises a sealing ring 411; the sealing ring 411 is arranged among the moisture-proof base 412, the moisture-proof cover 413 and the moisture-proof sealing cover 414, and is embedded into a sealing groove of the moisture-proof base; the sealing ring is used for sealing the connecting gap among the dampproof sealing shell, the dampproof cover and the dampproof base.
The sealing ring is arranged among the moistureproof base, the moistureproof cover and the moistureproof sealing cover and is inlaid in the groove of the moistureproof base. For example, when the moisture-proof cover is to close the upper region of the electrical connection plug-in unit of the moisture-proof base, the moisture-proof cover covers the moisture-proof base corresponding to the electrical connection plug-in unit, and a certain gap exists between the moisture-proof cover and the moisture-proof base; the dampproof sealing cover covers the dampproof base corresponding to the wiring terminal, and gaps exist between the dampproof sealing cover and the dampproof base; when the dampproof cover is connected with the dampproof sealing cover, gaps are also formed between the dampproof cover and the dampproof sealing cover. The sealing rings are filled in the sealing grooves between the sealing areas which are provided with gaps on the dampproof base when the dampproof base, the dampproof cover and the dampproof sealing cover are connected with each other in pairs.
The sealing ring may be made of nitrile rubber, polyurethane, polytetrafluoroethylene, fluororubber, polyoxymethylene, phenolic cloth, silica gel material, etc., which is not limited in the embodiment of the application. The sealing ring is made of a material with certain flexibility, so that the gap area formed by the moistureproof cover, the moistureproof sealing cover and the moistureproof base is convenient to operate during filling.
The shape of the sealing ring can be rectangle, square, round and the like, and is specifically selected according to the shape of a gap area formed by the moistureproof cover, the moistureproof sealing cover and the moistureproof base, and the sealing ring is not limited in the embodiment of the application.
In the relay device provided by the embodiment of the application, the dampproof sealing shell can further comprise a sealing ring, wherein the sealing ring is arranged among the dampproof base, the dampproof cover and the dampproof sealing cover, and the sealing ring is embedded into the sealing groove of the dampproof base; the sealing ring is used for sealing the connecting gap among the dampproof sealing shell, the dampproof cover and the dampproof base. On the basis of the dampproof sealing shell for sealing and protecting the relay body, the electric connection plug-in and the wiring terminal, the relay body, the electric connection plug-in and the wiring terminal are further guaranteed not to be in contact with the external environment, so that insulation performance reduction and misoperation caused by dampness of the relay body, the electric connection plug-in and the wiring terminal are avoided, and the safety and reliability of the electric power automation system are improved.
In the foregoing embodiment, it is mentioned that the moisture-proof sealing cover is provided with the wire inlet and outlet hole, which is a hole through which the connection wire between the connection terminal and the external electrical device passes, but in practical application, after the connection wire passes through the wire inlet and outlet hole, a gap is inevitably reserved, so in order to ensure the sealing effect, the gap can be sealed by the wire inlet and outlet moisture-proof sealing member. Then in one embodiment, as shown in fig. 5, the moisture tight seal housing further includes an in-out line moisture tight seal 511; the incoming and outgoing line moisture-proof seal 511 is provided in the incoming and outgoing line hole 512; the incoming and outgoing line moisture-proof sealing member 511 is used for sealing a gap between an incoming and outgoing line hole 512 of the moisture-proof sealing cover 513 and a connecting line of the connecting terminal 514 to an external electric device.
The material of the moisture-proof sealing ring for the inlet and outlet line can be nitrile rubber, polyurethane, polytetrafluoroethylene, fluororubber, polyoxymethylene, phenolic cloth, silica gel material and the like, and the embodiment of the application is not limited.
In order to fill up the gap between the wire inlet and outlet holes, the shape of the wire inlet and outlet moisture-proof sealing member can be a ring shape, or a lip shape with a Y-shaped section, and meanwhile, the wire inlet and outlet sealing member with a corresponding shape is manufactured according to the shape of the wire inlet and outlet holes, which is not limited in the embodiment of the application.
In the relay device provided by the embodiment of the application, the dampproof sealing shell can further comprise a wire inlet and outlet sealing element, a gap is inevitably reserved after the wire inlet and outlet hole passes through the connecting wire, and the wire inlet and outlet sealing element is embedded into the gap between the wire inlet and outlet hole and the connecting wire, so that the gap can be effectively filled, a better sealing effect is achieved, the interior of the dampproof shell is prevented from being completely not contacted with the external environment, and the insulation performance of the relay body, the electrical connection plug-in and the connecting terminal in the dampproof shell is prevented from being reduced and misoperation is prevented from occurring due to dampness, so that the safety and reliability of the electric power automation system are improved.
The above embodiment describes a moisture-proof sealed housing, and on the basis of this, the present application also provides a relay device, as shown in fig. 6, in which a contact vacuum housing 611 is provided inside a moisture-proof sealed housing 61. As shown in fig. 7, the contact vacuum housing 71 vacuum-seals and wraps the coil circuit 72 of the relay body and the contacts 73 of the relay body, wherein the metal terminals 74 led out of the coil circuit 72 of the relay body and the metal terminals 75 led out of the contacts 73 of the relay body are led out of the contact vacuum housing 71. Wherein the electrical metal portion of the contact vacuum housing 71 is connected to an electrical metal appliance on the moisture-tight base of the moisture-tight seal housing.
In the embodiment of the application, the contact vacuum housing is used for sealing the relay body and the contacts of the relay body, and based on the contact vacuum housing, the contact vacuum housing can be made of transparent material, opaque material or semitransparent material, and the contact vacuum housing is not limited in the embodiment of the application. The contact vacuum shell seals the relay body and the contacts of the relay body and the vacuum state is to be achieved in the sealed cavity, the contact vacuum shell can achieve the vacuum state through a vacuumizing and encapsulating technology, the infused electric sealant is epoxy encapsulating glue, and the coil circuit of the relay body and the contacts of the relay body are sealed and wrapped. In the contact vacuum shell, the coil circuit of the relay body generates electromagnetic effect after being electrified, so that the contacts of the relay body are contacted, and the conduction of the circuit is realized.
The relay device provided by the embodiment of the application comprises a contact vacuum shell, wherein the electric shock vacuum shell is arranged in a moistureproof sealing shell. The contact vacuum shell is used for carrying out vacuum sealing and wrapping on a coil circuit of the relay body and a contact of the relay body, wherein a metal terminal led out of the coil circuit of the relay body and a metal terminal led out of the contact of the relay body are led out of the contact vacuum shell, and an electric metal part of the contact vacuum shell is connected with an electric metal electric appliance on a moisture-proof base of the moisture-proof sealing shell. In the embodiment, the vacuum housing of electrocuting carries out vacuum seal parcel with the coil circuit of relay body and the contact of relay body to make the coil circuit of relay body, the contact of relay body in the vacuum state, isolated external environment, thereby avoid external environment to influence such as wet that it caused, avoided the maloperation that the relay appears, dampproofing seal housing seals the parcel with the contact vacuum housing, seal the parcel once more to the relay body promptly, form double containment structure, can thoroughly solve the maloperation problem that leads to because of wet, and then improve electric power automation system's fail safe nature.
The relay is sealed and wrapped outside the relay, misoperation of the relay body due to damp is avoided, and optionally, misoperation can be prevented by adding a circuit to the relay body. As shown in fig. 8, in one embodiment, the present application further provides a relay device, in which a quick release circuit 82 and a reverse isolation circuit 83 are added on the basis of a coil circuit 81 of a relay body; the quick release circuit 81 is connected in parallel with the coil circuit 82 of the relay body; the reverse isolation circuit 83 is connected in series with the relay body; the quick release circuit is used for releasing reverse electromotive force generated when the coil circuit of the relay body is in power failure; the reverse isolation circuit is used for isolating interference signals generated by the quick release circuit.
Alternatively, the quick release circuit 82 may be a diode with the coil circuit 81 of the relay body, and the anode of the diode is connected with the cathode of the coil circuit of the relay body; the negative electrode of the diode is connected with the positive electrode of the coil circuit of the relay body.
The reverse isolation circuit is connected in series in the power supply circuit and the coil circuit of the relay body, and can be a diode, a triode, a transistor and the like. The reverse isolation circuit is connected with the relay body in series and is used for isolating an interference signal generated by the quick release circuit, and the reverse isolation circuit also has a reverse connection preventing function, so that if the positive electrode of the power circuit is connected with the positive electrode of the reverse isolation circuit, namely, when the power supply is in reverse connection, the signal of the power circuit cannot be transmitted to the relay coil circuit due to the existence of the reverse isolation circuit, the coil circuit of the relay cannot be started, and the burning phenomenon of the relay circuit is avoided.
Alternatively, the reverse isolation circuit may be a diode, and the cathode of the diode is connected with the anode of the coil circuit of the relay body; the anode of the diode is connected with the cathode of the power circuit. Therefore, the basic principle of forward conduction and reverse cut-off of the diode is utilized to simply and effectively realize the isolation or reverse connection prevention effect of the reverse isolation circuit.
The relay device provided by the embodiment of the application comprises a reverse isolation circuit and a quick release circuit, wherein the quick release circuit is connected with a coil circuit of a relay body in parallel; the reverse isolation circuit is connected in series with the relay body. In the embodiment of the application, the quick bleeder circuit is connected in parallel with the coil circuit of the relay body and is used for bleeding back electromotive force generated when the coil circuit of the relay body loses electricity, so that relay misoperation caused by the capacitance effect of the circuit to the ground and the switching surge of a control signal of the coil circuit of the relay body is avoided; the reverse isolation circuit is connected with the relay body in series and is used for isolating an interference signal generated by the quick release circuit, so that the influence of the interference signal on the normal operation of the relay is avoided, the relay is further prevented from misoperation, meanwhile, the reverse isolation circuit also has a reverse connection preventing function, if the positive electrode of the power circuit is connected with the positive electrode of the reverse isolation circuit, the signal of the power circuit cannot be transmitted to the coil circuit of the relay, the coil circuit of the relay cannot be started, damage to the relay is avoided, and the safety and reliability of the electric power automation system are further improved.
Considering that in practical application, the relay is not normally opened to cause the relay to be refused to operate because the body coil of the relay is mildewed and broken due to damp, and the refusing operation of the relay device can be avoided by a backup starting coil means. It should be noted that, the implementation process of preventing the false operation can be combined with the embodiment of preventing the false operation in the foregoing embodiment, so that the relay can not only prevent the false operation and prevent the false operation in practical application, but also realize the false operation and the false operation simultaneously, and the safety and the reliability of the electric power automation system are doubly ensured.
Fig. 9 is a block diagram of the backup start coil of the relay device, and as shown in fig. 9, the relay device includes a backup start coil 91 and a relay body coil 92. The backup start coil 91 is connected in parallel with the relay body coil 92, i.e. the positive pole of the backup start coil 91 is connected with the positive pole of the relay body coil 92, and the negative pole of the backup start coil 91 is connected with the negative pole of the relay body coil 92.
In practical application, when the body coil of the relay is damaged and broken due to damp, the relay cannot be normally opened, and then the backup starting coil is used for replacing the normal work of the body coil of the relay when the body coil of the relay cannot be normally opened to generate the refusing operation, namely, the relay device can normally work by receiving the signal of the power supply circuit.
The backup starting coils and the relay body coils have the same functional structure, each backup starting coil comprises at least one group of backup starting coils, each group of backup starting coils is connected with the body coils of the relay body in parallel, the two groups of backup starting coils are connected in series, and one relay device can comprise a plurality of groups of backup starting coils.
Alternatively, as shown in fig. 10, the backup start coils include at least one set of backup start coils, and each set of backup start coils is connected in parallel with the body coil of the relay body.
Because in actual use, the relay device comprises at least one group of coil circuits of the relay body, and based on the coil circuits, a backup starting coil is connected in parallel to the coil circuits of the relay body of each group in order to ensure the normal starting of the relay device.
The relay device provided by the embodiment of the application comprises a backup starting coil and a body coil of the relay. The backup starting coil and the relay body coil are connected in parallel, namely, the positive electrode of the backup starting coil is connected with a coil circuit of the relay body, and the negative electrode of the backup starting coil is connected with the negative electrode of the relay body coil. In the embodiment of the application, when the body coil of the relay body is damaged and broken due to damp, the backup starting coil can be normally started when the relay cannot be normally started to generate the refusing operation, and the relay device can normally work after receiving the signal of the power supply circuit, so that the refusing problem of the relay device is solved, the refusing problem of the relay coil due to oxidization and the damage and broken surface is thoroughly solved, and the safety and the reliability of the electric power automation system are improved.
Based on the circuit, the quick release circuit, the reverse isolation circuit and the backup starting coil can be combined, and the quick release circuit, the reverse isolation circuit and the backup starting coil are added in the coil circuit of the relay body together, so that the relay can prevent misoperation and can prevent refusal operation in actual application, and further the safety and the reliability of the electric power automation system can be doubly ensured. Thus, as illustrated in fig. 11, the relay apparatus of fig. 11 includes a quick bleed circuit 1111, a reverse isolation circuit 1112, a coil circuit 1113 of the relay body, and a backup start coil 1114. Wherein the fast bleeder circuit 1111 is connected in parallel with the coil circuit 1113 of the relay body; the reverse isolation circuit 1112 is connected in series with the coil circuit 1113 of the relay body; the backup starting coil and the relay body coil are connected in parallel, namely, the positive electrode of the backup starting coil is connected with the positive electrode of the relay body coil circuit, and the negative electrode of the backup starting coil is connected with the negative electrode of the relay body coil.
In the embodiment, the quick release circuit can release the reverse electromotive force generated when the coil circuit of the relay body loses power, so that the relay misoperation caused by the capacitive effect of the circuit to the ground and the switching surge of the control signal of the coil circuit of the relay body is avoided; meanwhile, the reverse isolation circuit can isolate the interference signals generated by the quick release circuit, so that the influence of the interference signals on the normal operation of the relay is avoided, and the misoperation of the relay is further avoided; in addition, the reverse isolation circuit also has a reverse connection preventing function, so that damage to the relay caused by reverse connection of the power supply circuit is avoided, and the safety and reliability of the power automation system are further improved. The backup starting coil, the quick release circuit and the reverse isolation circuit are combined together, when the quick release circuit can release the reverse electromotive force generated when the coil circuit of the relay body is powered off, the reverse isolation circuit can isolate the interference signal generated by the quick release circuit, and meanwhile, the backup starting coil can be normally started when the relay cannot be normally started to generate the refusing operation due to the fact that the relay is not normally started when the body coil of the relay body is damped to generate mildew and rot broken lines, and the relay device can normally work due to the fact that the relay cannot normally start.
Therefore, in the embodiment, the mode of combining the quick release circuit, the reverse isolation circuit, the coil circuit of the relay body and the backup starting coil can thoroughly solve the problems of misoperation of the relay body and refusal of the relay body due to oxidation and mildew broken line surface caused by the capacitive effect of the coil circuit of the relay body to the ground and the switching surge of the control signal, and improve the safety and reliability of the electric power automation system.
Fig. 12 is a block diagram of a relay device according to another embodiment of the present application. As shown in fig. 12, the relay device includes a moisture-proof seal housing 121, a contact vacuum housing 122, a coil 123 of the relay body, a quick release circuit 124 and a reverse isolation circuit 125, and a backup start coil 126. Wherein the moisture-proof sealing shell 121 comprises a moisture-proof cover 1212, a moisture-proof sealing cover 1212 and a moisture-proof base 1213; the moisture-proof sealing shell 121 simultaneously wraps the contact vacuum shell 122 therein, and the contact vacuum shell 122 is positioned under the moisture-proof cover 1212; the contact vacuum housing 122 encloses the relay body coil 123 and the quick release circuit 124 and the reverse isolation circuit 125 and the backup start coil 126. The quick release circuit is connected with the coil circuit of the relay body in parallel; the reverse isolation circuit 125 is connected in series with the relay body; the backup start coil 126 is connected in parallel with the relay body coil 125, i.e. the positive pole of the backup start coil 126 is connected with the positive pole of the relay body coil 125, and the negative pole of the backup start coil 126 is connected with the negative pole of the relay body coil 125.
In the embodiment of the application, the dampproof sealing shell is used for sealing the relay body and the dampproof base; wherein, dampproofing sealed casing is protruding font structure. The material of the moisture-proof sealing shell is semitransparent material, which can be liquid photosensitive resin material or Low Density Polyethylene (LDPE) material, etc., and the embodiment of the application is not limited. Wherein, the moisture-proof base can comprise a circuit system for controlling the external expansion device connected to the wiring terminal when the relay is connected with the electric connection plug-in. For example, the relay body can be controlled to be opened and closed by the circuit system in the moisture-proof base after being electrified. Wherein, after dampproofing cover, dampproofing sealed lid and dampproofing base configuration are accomplished, can utilize ultrasonic welding technique to weld the triplex into a closed cavity.
In the embodiment of the application, the contact vacuum housing is used for sealing the relay body and the contacts of the relay body, and based on the contact vacuum housing, the contact vacuum housing can be made of transparent material, opaque material or semitransparent material, and the contact vacuum housing is not limited in the embodiment of the application. The contact vacuum shell seals the relay body and the contacts of the relay body and the vacuum state is to be achieved in the sealed cavity, the contact vacuum shell can achieve the vacuum state through a vacuumizing and encapsulating technology, the infused electric sealant is epoxy encapsulating glue, and the coil circuit of the relay body and the contacts of the relay body are sealed and wrapped. In the contact vacuum shell, the coil circuit of the relay body generates electromagnetic effect after being electrified, so that the contacts of the relay body are contacted, and the conduction of the circuit is realized.
In the embodiment of the application, in the interior of the contact vacuum shell, the quick release circuit is connected with the coil circuit of the relay body in parallel and can be a diode, and the positive electrode of the diode is connected with the negative electrode of the coil circuit of the relay body; the negative electrode of the diode is connected with the positive electrode of the coil circuit of the relay body. The backup starting coils and the relay body coil have the same functional structure, the backup starting coils comprise at least one group of backup starting coils, each group of backup starting coils are connected with the body coil of the relay body in parallel, the two groups of backup starting coils are connected in series, and one relay device can comprise a plurality of groups of backup starting coils.
The composition, connection relation and use process of each part in this embodiment can be seen in the detailed description in the foregoing embodiments, and will not be described in detail here.
The relay device provided by the embodiment of the application comprises a moistureproof sealing shell, a contact vacuum shell, a coil of a relay body, a quick release circuit, a reverse isolation circuit and a backup starting coil. The moistureproof sealing shell comprises a moistureproof cover, a moistureproof sealing cover and a moistureproof base; the moisture-proof sealing shell simultaneously wraps the contact vacuum shell, and the contact vacuum shell is positioned under the moisture-proof cover; the contact vacuum shell wraps and seals the relay body coil, the quick release circuit, the reverse isolation circuit and the backup starting coil. The quick release circuit is connected with the coil circuit of the relay body in parallel; the reverse isolation circuit is connected with the relay body in series; the backup starting coil and the relay body coil are connected in parallel, namely, the positive electrode of the backup starting coil is connected with the positive electrode of the relay body coil, and the negative electrode of the backup starting coil is connected with the negative electrode of the relay body coil. The relay body, the electric connection plug-in unit connected with the relay body and the wiring terminal connected with external electric equipment are sealed and protected by the moistureproof cover, the moistureproof sealing shell and the moistureproof base, so that the relay body is isolated from the external environment to form a sealed cavity, the relay is prevented from being influenced by the external environment, and the relay coil is subjected to damp oxidation to cause the operation rejection and misoperation of the relay; meanwhile, the contact vacuum shell wraps the coil, the quick release circuit, the reverse isolation circuit and the backup starting coil of the relay body, so that the coil circuit of the relay body is further prevented from being influenced by external environment, and misoperation and refusal operation are caused; therefore, the contact vacuum shell and the moistureproof sealing shell are combined to form a fully-closed double-sealing structure, so that the relay is thoroughly isolated from the external environment, relay coil damp oxidation and relay operation refusing and misoperation caused by mould mess broken lines due to the fact that the relay is not influenced by the external environment are further ensured, and the safety and reliability of the power system automation are greatly improved. In addition, in the internal circuit of the relay, the quick release circuit can release the reverse electromotive force generated when the coil circuit of the relay body loses electricity, so that the misoperation of the relay caused by the capacitance effect of the circuit to the ground and the switching surge of the control signal of the coil circuit of the relay body is avoided; meanwhile, the reverse isolation circuit not only can isolate the interference signals generated by the quick release circuit to avoid the influence of the interference signals on the normal operation of the relay, but also can avoid misoperation of the relay; and the reverse isolation circuit also has the reverse connection preventing function, so that damage to the relay caused by reverse connection of the power supply circuit is avoided, and the safety and reliability of the power automation system are further improved. The backup starting coil, the quick release circuit and the reverse isolation circuit are combined together, when the quick release circuit can release the reverse electromotive force generated when the coil circuit of the relay body is powered off, the reverse isolation circuit can isolate the interference signal generated by the quick release circuit, and meanwhile, the backup starting coil can be normally started when the relay cannot be normally started to generate the refusing operation due to the fact that the relay is not normally started when the body coil of the relay body is damped to generate mildew and rot broken lines, namely, the relay device can normally work due to the fact that the relay device receives the signal of the power circuit, and therefore the refusing problem of the relay device is solved.
The relay device is formed by combining a dampproof sealing shell, a contact vacuum shell, a coil of a relay body, a quick release circuit, a reverse isolation circuit and a backup starting coil, can be used for sealing and wrapping the outside of a relay to form a double-sealing closed cavity which is completely isolated from the outside, and meanwhile, the starting reliability and starting power of the relay can be improved by adding the relay from the inside of a circuit of the relay, so that the relay device is ensured to be free from misoperation and operation rejection in use, and the safety reliability of an electric power automation system is greatly improved.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (9)
1. The relay device is characterized by comprising a dampproof sealing shell, a reverse isolation circuit, a quick release circuit and a backup starting coil, wherein the dampproof sealing shell comprises a dampproof cover, a dampproof sealing cover and a dampproof base which form a sealing cavity;
an electrical connection plug-in and a wiring terminal are arranged on the moistureproof base; the electrical connection plug-in is used for connecting the relay body and the moistureproof base in the closed cavity; the wiring terminal is used for connecting external electrical equipment;
the upper part of the relay body is sealed by the moisture-proof cover; the upper part of the wiring terminal is sealed by the moisture-proof sealing cover;
the moistureproof sealing cover is provided with a wire inlet and outlet hole, and a connecting wire between the wiring terminal and the external electrical equipment passes through the wire inlet and outlet hole;
the quick release circuit is connected with the coil circuit of the relay body in parallel; the reverse isolation circuit is connected with the relay body in series; the quick release circuit is used for releasing reverse electromotive force generated when the coil circuit of the relay body is in power failure; the reverse isolation circuit is used for isolating the interference signals generated by the rapid release circuit so as to prevent reverse connection of a power supply;
The backup starting coil and the relay body coil of the relay body have the same function; the backup starting coil is connected with the relay body coil in parallel; the backup starting coil is used for automatically replacing the relay body coil to perform normal operation when the relay body coil of the relay body is in refusal operation;
the relay device comprises at least one group of relay body coils, and each group of relay body coils is connected with a backup starting coil in parallel; the backup starting coils comprise at least one group of backup starting coils, each group of backup starting coils is connected with the corresponding relay body coil in parallel, and the backup starting coils are connected in series;
each relay body coil and backup starting coil in the relay are connected in parallel with a quick bleeder circuit, and all relay body coils and backup starting coils in the relay share a reverse isolation circuit.
2. The relay device of claim 1, wherein the moisture resistant seal housing further comprises a seal ring; the sealing ring is arranged among the moisture-proof base, the moisture-proof cover and the moisture-proof sealing cover, and is embedded into the sealing groove of the moisture-proof base;
The sealing ring is used for sealing the connecting gap between the dampproof sealing cover, the dampproof cover and the dampproof base.
3. The relay device according to claim 1 or 2, wherein the moisture-proof seal housing further comprises an incoming and outgoing line moisture-proof seal; the wire inlet and outlet moistureproof sealing element is arranged in the wire inlet and outlet hole;
the wire inlet and outlet moistureproof sealing piece is used for sealing a gap between a wire inlet and outlet hole in the moistureproof sealing cover and a connecting wire for connecting the wiring terminal with the external electrical equipment.
4. The relay device according to claim 1 or 2, wherein an action signal lamp is arranged in the moisture-proof sealing shell; the action signal lamp is used for displaying the working state of the relay.
5. Relay device according to claim 1 or 2, characterized in that the relay device further comprises a contact vacuum housing; the metal terminals of the coil circuit of the relay body and the metal terminals of the contacts of the relay body penetrate out of the contact vacuum shell;
the contact vacuum shell is used for sealing a coil circuit and contacts of the relay body.
6. The relay device of claim 5, wherein the contact vacuum housing is disposed within the moisture-tight sealed housing and the electrical metal portion of the contact vacuum housing is connected to an electrical metal appliance on a moisture-tight base of the moisture-tight sealed housing.
7. The relay device according to claim 1, wherein the external electric equipment is a connection electric equipment which needs to be controlled by a relay in an indoor and outdoor operation mechanism box, a terminal box and a distribution network cabinet in an electric power system.
8. The relay device of claim 1, wherein the fast bleeding circuit and the reverse isolation circuit each comprise a diode;
the positive electrode of the diode in the rapid release circuit is connected with the negative electrode of the coil circuit of the relay body; the cathode of the diode is connected with the anode of the coil circuit of the relay body;
the negative electrode of the diode in the reverse isolation circuit is connected with the positive electrode of the coil circuit of the relay body; the anode of the diode is connected with the cathode of the power supply circuit.
9. The relay device of claim 1, further comprising an in-out wire seal; the wire inlet and outlet sealing piece is used for filling gaps between the wire inlet and outlet holes and the connecting wires.
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| CN202011146431.0A CN112185762B (en) | 2020-10-23 | 2020-10-23 | Relay device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011146431.0A CN112185762B (en) | 2020-10-23 | 2020-10-23 | Relay device |
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| CN112185762A CN112185762A (en) | 2021-01-05 |
| CN112185762B true CN112185762B (en) | 2023-08-25 |
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| US4888494A (en) * | 1987-11-02 | 1989-12-19 | Mcnair Rhett | Electromechanical lamp switching |
| JPH02220322A (en) * | 1989-02-20 | 1990-09-03 | Mitsubishi Electric Corp | Polarized electromagnetic relay and circuit using the same |
| CN202352585U (en) * | 2011-09-27 | 2012-07-25 | 江苏正启电气有限公司 | Eight-contact relay |
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| CN112185762A (en) | 2021-01-05 |
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