CN111370262A - Electrical equipment switch device - Google Patents

Electrical equipment switch device Download PDF

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Publication number
CN111370262A
CN111370262A CN202010300926.8A CN202010300926A CN111370262A CN 111370262 A CN111370262 A CN 111370262A CN 202010300926 A CN202010300926 A CN 202010300926A CN 111370262 A CN111370262 A CN 111370262A
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CN
China
Prior art keywords
static
movable
contact
conductive
end cover
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Pending
Application number
CN202010300926.8A
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Chinese (zh)
Inventor
王守林
常成远
邹岩
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Jilin Jinxu Technology Development Co ltd
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Jilin Jinxu Technology Development Co ltd
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Application filed by Jilin Jinxu Technology Development Co ltd filed Critical Jilin Jinxu Technology Development Co ltd
Priority to CN202010300926.8A priority Critical patent/CN111370262A/en
Publication of CN111370262A publication Critical patent/CN111370262A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
    • H01H47/18—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for introducing delay in the operation of the relay
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/007—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current with galvanic isolation between controlling and controlled circuit, e.g. transformer relay

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

The invention discloses electrical equipment switch equipment which comprises an insulating shell, a movable conductor element, a static conductor element, a nonlinear resistor and an auxiliary delay switch, wherein the movable conductor element is arranged on the insulating shell; the insulating shell is hollow to form an insulating cavity; the static conductor element comprises a static conductive rod and a static contact, and at least one part of the static contact and the static conductive rod is arranged in the insulating chamber; the movable conductor element comprises a movable conducting rod and a movable contact, at least one part of the movable conducting rod and the movable conducting rod are arranged in the insulating cavity, and the movable conducting rod can move along the axial direction of the insulating shell, so that the movable contact and the fixed contact are contacted and separated; two ends of a series circuit formed by the auxiliary delay switch and the nonlinear resistor are respectively and electrically connected with the moving conductor element and the static conductor element; when the moving contact and the static contact are separated to the maximum displacement, the auxiliary delay switch is in an off state, and when the moving contact is in other positions, the auxiliary delay switch is in an on state. The equipment has high safety and stability.

Description

Electrical equipment switch device
Technical Field
The invention relates to electrical equipment switch equipment, in particular to high-voltage and low-voltage electrical equipment switch equipment.
Background
For a traditional high-voltage and low-voltage electrical appliance switch, electric arcs can be generated between a moving contact and a fixed contact of the switch under the action of current or voltage existing in a circuit. The arc can reach thousands of degrees celsius, causing the conductive metal to melt and the switch to break. At present, the method for preventing the electric arc from damaging the electric switch comprises the steps of placing a contact in an arc extinguishing cover, immersing the contact in insulating oil, sealing the contact in a vacuum container, enclosing the contact in inert gas and the like.
CN108172478A discloses a soft start circuit breaker. The soft start circuit breaker comprises a breaking chamber, wherein a fixed contact and a movable contact are arranged in the breaking chamber, the two contacts are shared or one of the two contacts is composed of a main conductive column and a non-main conductive column, a nonlinear volt-ampere resistance material is arranged at least at one position on the non-main conductive column, and the non-main conductive column at least comprises a lead buffer column. In the circuit breaker, the nonlinear volt-ampere resistor is connected with the moving contact and the static contact in series, and the circuit current is increased in a step mode.
CN106537545A discloses an electrical switching apparatus for medium and/or high voltage applications. The electrical switching device has at least two contact-capable conductor elements which can be separated by a braking device, and a housing which defines a switching chamber and is formed by an insulating body which at least partially surrounds the conductor elements, the housing having on at least one side an electrically resistive coating which is formed by a matrix material which is filled with a filler and is electrically conductively connected to the conductor elements. According to the electric switch equipment, the resistive coating is arranged outside the shell, so that the electric field distortion caused by surface charges in the switch equipment area is reduced, but the resistive coating is easy to fall off, the durability is poor, and the arc extinguishing effect is poor.
CN203134625U discloses an air switch contact mechanism. The air switch contact mechanism comprises an insulating arc extinguish chamber shell, a fixed contact, a movable contact, a nonlinear resistance chamber and a nonlinear resistor, wherein the contact end of the fixed contact is fixedly arranged in the insulating arc extinguish chamber shell, and the wiring end of the fixed contact extends out of the insulating arc extinguish chamber shell; the contact end of the moving contact is arranged in the insulating arc extinguish chamber shell and matched with the contact end of the static contact, the nonlinear resistor is arranged in the nonlinear resistor chamber, two ends of the nonlinear resistor are respectively connected with the wiring ends of the static contact and the moving contact, the moving contact is connected with the leading-out end of the moving contact through the conductive elastic sheet, one end of the conductive elastic sheet is lapped at the end part of the nonlinear resistor, the other end of the conductive elastic sheet is communicated with the moving contact through the conductive spring, and the nonlinear resistor is formed by laminating and connecting silicon carbide resistor sheets in series. This air switch contact mechanism is provided with the non-linear resistance room alone, and the structure is loaded down with trivial details, and the arc extinguishing effect is not good.
Disclosure of Invention
In view of the above, the present invention provides an electrical switch apparatus, which has high safety and stability.
The invention provides electrical equipment switch equipment which comprises an insulating shell, a movable conductor element, a static conductor element, a nonlinear resistor and an auxiliary delay switch, wherein the movable conductor element is arranged on the insulating shell;
the insulating shell comprises a sleeve body, a movable end cover and a static end cover, the movable end cover and the static end cover are respectively arranged at two ends of the sleeve body, the movable end cover is provided with a movable end cover opening, the static end cover is provided with a static end cover opening, and the sleeve body, the movable end cover and the static end cover form an insulating cavity;
the static conductor element comprises a static conductive rod and a static contact, and the static conductive rod is connected with the static contact; the static conductive rod extends into the insulating cavity from the opening of the static end cover and is fixedly connected with the opening of the static end cover; at least one part of the static contact and the static conducting rod is arranged in the insulating cavity;
the movable conductor element comprises a movable conducting rod and a movable contact, and the movable conducting rod is connected with the movable contact; the movable conducting rod extends into the insulating cavity from the opening of the movable end cover, at least one part of the movable contact and the movable conducting rod are arranged in the insulating cavity, and the movable conducting rod can move along the axial direction of the sleeve body, so that the movable contact is contacted with and separated from the fixed contact;
the auxiliary delay switch is connected with the nonlinear resistor in series, one end of a series circuit formed by the auxiliary delay switch and the nonlinear resistor is electrically connected with the movable conductor element, and the other end of the series circuit is electrically connected with the static conductor element;
wherein the state of the auxiliary delay switch is set to be determined by the position of the movable contact; when the moving contact and the static contact are separated to the maximum displacement, the auxiliary time delay switch is in a disconnected state; when the moving contact is at other positions, the auxiliary delay switches are all in a closed state.
According to the electric switching apparatus of the present invention, preferably, the auxiliary delay switch and the nonlinear resistor are both disposed in an insulating chamber.
According to the electrical switching apparatus of the present invention, preferably, the movable contact has a diameter larger than a diameter of the movable conductive rod.
According to the electrical switching apparatus of the present invention, preferably, the auxiliary delay switch includes a conductive sleeve and a conductive elastic piece;
the conductive sleeve is connected with the movable conductive rod and the static conductive rod in an insulating way, the conductive sleeve, the movable conductive rod and the static conductive rod form an insulating medium chamber, and at least one part of the static contact and at least one part of the movable contact are arranged in the insulating medium chamber; the nonlinear resistor is electrically connected with the conductive sleeve;
one end of the conductive elastic sheet is fixedly connected with the conductive sleeve, and the conductive elastic sheet is arranged to be in contact with the moving contact; when the moving contact and the static contact are separated to the maximum displacement, the other end of the conductive elastic sheet is contacted with the conductive sleeve under the pressure action of the moving contact, so that the auxiliary delay switch is in an off state.
According to the electrical switching apparatus of the present invention, preferably, the movable contact includes a terminal portion and a connecting portion; the connecting part is connected with the movable conducting rod; the diameter of the end head portion is larger than that of the connecting portion.
According to the electric switching apparatus of the present invention, preferably, the auxiliary delay switch includes a conductive sleeve and a conductive ring;
the conductive sleeve is electrically connected with the connecting part of the moving contact and is in insulated connection with the static conductive rod; the conductive sleeve, the moving contact and the static conductive rod form an insulating medium chamber, at least one part of the static contact and at least one part of the moving contact are arranged in the insulating medium chamber, and the nonlinear resistor is electrically connected with the conductive sleeve;
the conducting ring is arranged on the periphery of the moving contact; when the moving contact and the static contact are separated to the maximum displacement, the conducting ring is contacted with the conducting sleeve, so that the auxiliary delay switch is in a disconnected state.
According to the electrical switch device of the present invention, preferably, the movable conducting rod is connected with the opening of the movable end cover through a guide sleeve provided with a fixed ring; the diameter of one end, far away from the static contact, of the static conductive rod is larger than the inner diameter of the opening of the static end cover.
According to the electrical switch device of the present invention, preferably, one end of the static conductive rod, which is far away from the static contact, is provided with a static outlet terminal.
According to the electrical switch device of the present invention, preferably, a corrugated tube is disposed outside the movable conducting rod, and a return spring is disposed outside the corrugated tube; one end of the reset spring is connected with the conductive sleeve, and the other end of the reset spring is connected with the movable end cover.
According to the electrical switching apparatus of the present invention, preferably, the nonlinear resistor is formed by compounding nano zinc oxide and nano silicon carbide.
The invention adopts the nonlinear resistor as the electrical switch equipment of the bypass, so that the current can flow through the bypass when the electrical switch is switched on or switched off, and no electric arc is generated between the moving contact and the static contact. When the nonlinear resistor is changed into a high-resistance state, the auxiliary delay switch is turned off in a delayed manner after the bypass current is cut off, so that the load side is not electrified any more after the electric appliance switch is turned off, and the safety is improved.
Drawings
FIG. 1 is a schematic circuit diagram of an electrical switch of the present invention;
FIG. 2 is a schematic diagram of an electrical switchgear of the present invention;
fig. 3 is a schematic view of the mechanism of another electrical switching apparatus according to the present invention.
The reference numerals are explained in detail as follows:
Rf-a non-linear resistance; kf-a time-delayed auxiliary switch; k-switch contacts; 1-a movable conducting rod; 2-fixing the ring; 3, a guide sleeve; 4-moving the end cover; 5-a corrugated pipe; 6-a return spring; 7-a conductive sleeve; 8-moving contact; 9-static contact; 10-an insulating medium chamber; 11-an insulating housing; 12-nonlinear resistance; 13-a static conductive rod; 14-a static end cap; 15-stationary outlet terminal; 16-a conductive dome; 17-an insulating positioning means; an 18-conductor loop; 19-conductive ring.
Detailed Description
The present invention will be further described with reference to the following specific examples, but the scope of the present invention is not limited thereto.
The electrical switch equipment comprises an insulating shell, a movable conductor element, a static conductor element, a nonlinear resistor and an auxiliary delay switch. The switch is especially suitable for high and low voltage electric appliances.
The insulating shell comprises a sleeve body, a movable end cover and a static end cover, wherein the movable end cover and the static end cover are respectively arranged at two ends of the sleeve body. The sleeve body, the movable end cover and the static end cover are made of insulating materials. The sleeve body can be cylindrical or cuboid. The movable end cover is provided with a movable end cover opening. The inner diameter of the opening of the movable end cover can be the same as or close to the diameter of the movable conducting rod. The stationary end cap is provided with a stationary end cap opening. The inner diameter of the opening of the static end cover can be the same as or similar to the diameter of the part of the static guide rod extending into the insulating chamber. The sleeve body, the movable end cover and the static end cover form an insulation cavity.
The static conductor component comprises a static conducting rod and a static contact, and the static conducting rod is connected with the static contact. The static conducting rod extends into the insulating cavity from the opening of the static end cover and is fixedly connected with the opening of the static end cover. At least one part of the static contact and the static conducting rod is arranged in the insulating cavity.
The diameter of the static conducting rod in the insulating cavity is the same as or similar to the inner diameter of the opening of the static end cover. In some embodiments, a portion of the static conductive rod extends into the insulating chamber and another portion is disposed outside the insulating chamber. Preferably, the diameter of the part of the static conductive rod extending into the insulating cavity is smaller than the diameter of the part of the static conductive rod outside the insulating cavity. More preferably, the outer diameter of the part of the static conductive rod extending into the insulation cavity is the same as the inner diameter of the opening of the static end cover, and the diameter of the static conductive rod at the outer part of the insulation cavity is larger than the inner diameter of the opening of the static end cover. And a static wire outlet end is arranged at one end of the static wire rod, which is far away from the static contact.
The diameter of the static contact is larger than that of the static conducting rod. In some embodiments, the side surface of the stationary contact is in the shape of an outwardly convex arc. The upper and lower surfaces of the static contact can be respectively set to be circular or elliptical. The whole static contact can be drum-shaped. According to one embodiment of the invention, the upper surface and the lower surface of the static contact are both circular, the side surface of the static contact is arc-shaped and protrudes outwards, and the whole static contact is drum-shaped. In other embodiments, the stationary contact comprises an insulating positioning device and a conductor ring, the insulating positioning device being connected to the conductor ring, and the conductor ring being connected to the stationary conducting rod. The insulation positioning device is used for fixing the position of the moving contact. According to one embodiment of the invention, the insulating positioning device is in the shape of a quincunx and has a plurality of positioning claws, each positioning claw being provided with a protrusion. The conductor ring can contact and separate with the moving contact, so that the breaking and closing of the electric switch are realized.
The movable conductor element comprises a movable conducting rod and a movable contact, and the movable conducting rod is connected with the movable contact. The movable conducting rod extends into the insulating cavity from the opening of the end cover. The moving contact and at least one part of the moving conducting rod are arranged in the insulating cavity.
The movable conducting rod can move along the axis direction of the sleeve body, so that the movable contact is contacted with and separated from the fixed contact. According to one embodiment of the invention, the movable conducting rod can be connected with the movable end cover through a guide sleeve provided with a fixed ring. The periphery of the movable conducting rod can be further provided with a corrugated pipe, the periphery of the corrugated pipe can be further provided with a return spring, one end of the return spring is connected with the movable end cover, and the other end of the return spring is connected with the conducting sleeve.
The moving contact is arranged to be capable of contacting and separating with the fixed contact, so that the closing and breaking of the electric switch are realized. In some embodiments, the diameter of the movable contact is greater than the diameter of the movable conducting rod, and the side surface of the movable contact is in an arc shape protruding outwards. The upper surface and the lower surface of the moving contact can be respectively set to be circular or oval. The moving contact can be drum-shaped as a whole. According to one embodiment of the invention, the upper surface and the lower surface of the moving contact are both round, the side surface of the moving contact is an arc which protrudes outwards, and the moving contact is overall drum-shaped. In other embodiments, the movable contact is divided into a terminal portion and a connecting portion, the connecting portion is connected to the movable conductive rod, and the diameter of the terminal portion is larger than that of the connecting portion. Preferably, the end head portion is hemispherical and the connecting portion is cylindrical.
The auxiliary delay switch is connected with the nonlinear resistor in series, one end of a series circuit formed by the auxiliary delay switch and the nonlinear resistor is electrically connected with the moving conductor element, and the other end of the series circuit is electrically connected with the static conductor element; the state of the auxiliary delay switch is determined by the position of the moving contact, when the moving contact is separated from the static contact to the maximum displacement, the auxiliary delay switch is in an off state, and when the moving contact is in other positions, the auxiliary delay switch is in an on state. The auxiliary delay switch is disposed within the insulating chamber. The series circuit formed by the auxiliary delay switch and the nonlinear resistor is connected with the moving contact and the fixed contact in parallel. When the electric switch performs the action of closing or opening, the current passes through a bypass formed by the auxiliary delay switch and the nonlinear resistor, and no electric arc is generated between the moving contact and the static contact. When the moving contact reaches the maximum displacement separated from the static contact, the auxiliary delay switch is in a disconnected state, so that the load side is not electrified after the electric switch is disconnected.
In some embodiments, the auxiliary delay switch includes a conductive sleeve and a conductive elastic sheet, the conductive sleeve is in insulation connection with the movable conductive rod and the static conductive rod, the conductive sleeve, the movable conductive rod and the static conductive rod form an insulation medium chamber, at least a part of the static contact and the movable contact are arranged in the insulation medium chamber, and the nonlinear resistor is electrically connected with the conductive sleeve; one end of the conductive elastic sheet is fixedly connected with the conductive sleeve, the conductive elastic sheet is contacted with the movable contact, and when the movable contact is separated from the fixed contact to the maximum displacement, the other end of the conductive elastic sheet is contacted with the conductive sleeve under the action of the pressure of the movable contact, so that the auxiliary delay switch is in a disconnected state. In some embodiments, the stationary contact and the movable contact are disposed within an insulating dielectric chamber. In some embodiments, the conductive spring pieces may include two groups, which are disposed on two sides of the movable contact. The conductive elastic sheet can play a role in controlling the open and close states of the auxiliary delay switch and also can play a role in fixing the position of the moving contact. The insulating medium chamber is filled with insulating medium, so that the resistance between the moving contact and the fixed contact is increased when the moving contact and the fixed contact are separated, and the current is quickly transferred to a bypass formed by the nonlinear resistor and the auxiliary delay switch. The electric sheath can be provided with an upper opening and a lower opening, the upper opening is connected with the static conducting rod in an insulating mode, and the lower opening is connected with the movable conducting rod in an insulating mode through the corrugated pipe. Thus, the conductive sleeve is in insulated connection with the movable conductive rod and the static conductive rod.
In other embodiments, the auxiliary delay switch includes a conductive sleeve and a conductive ring. The conductive sleeve is electrically connected with the moving contact connecting part and is connected with the static conductive rod in an insulating way. The conductive sleeve, the movable contact and the static conductive rod form an insulating medium chamber. At least one part of the static contact and the moving contact are arranged in the insulating medium chamber, and the nonlinear resistor is electrically connected with the conductive sleeve; the conducting ring is arranged on the periphery of the moving contact, and when the moving contact and the static contact are separated to the maximum displacement, the conducting ring is contacted with the conducting sleeve, so that the auxiliary delay switch is in a disconnected state. In some embodiments, the stationary contact and the movable contact terminal are disposed within an insulating medium chamber. The insulating medium chamber is filled with insulating medium, so that the resistance between the moving contact and the fixed contact is increased when the moving contact and the fixed contact are separated, and the current is quickly transferred to a bypass formed by the nonlinear resistor and the auxiliary delay switch. The electric sheath can be provided with an upper opening and a lower opening, the upper opening is connected with the static conducting rod in an insulating mode, and the lower opening is connected with the movable conducting rod in an insulating mode through the corrugated pipe. Thus, the conductive sleeve is in insulated connection with the movable conductive rod and the static conductive rod.
The nonlinear resistor of the invention is in a low resistance state when no current flows, and the resistor is in a high resistance state instantly when current flows. The nonlinear resistor can be compounded by nanometer zinc oxide and nanometer silicon carbide. The nonlinear resistor is arranged in the insulating cavity. One end of the nonlinear resistor is electrically connected with the static conductive rod, and the other end of the nonlinear resistor is electrically connected with the conductive sleeve.
Example 1
FIG. 1 is a schematic circuit diagram of an electrical switch of the present invention; fig. 2 is a schematic structural diagram of an electrical switching apparatus according to the present invention. The electrical switchgear of this embodiment includes an insulating housing, a moving conductor element, a stationary conductor element, a non-linear resistor 12, and an auxiliary delay switch.
The insulating shell comprises a sleeve body 11, a movable end cover 4 and a static end cover 14. The movable end cover 4 and the static end cover 14 are respectively arranged at two ends of the sleeve body 11. The moving end cap 4 is provided with a moving end cap opening and the stationary end cap 14 is provided with a stationary end cap opening. The sleeve body 11, the movable end cover 4 and the static end cover 14 form an insulating cavity.
The static conductor element comprises a static conducting rod 13 and a static contact 9, and the static conducting rod 13 is connected with the static contact 9. The static conductive rod 13 extends into the insulating chamber from the opening of the static end cover 14. The stationary contact 9 and a part of the stationary conducting rod 13 are arranged in the insulating chamber. The diameter of the part of the static conductive rod 13 extending into the insulating cavity is the same as or close to the inner diameter of the opening of the static end cover 14, the diameter of the part of the static conductive rod 13 outside the insulating cavity is larger than the inner diameter of the opening of the static end cover 14, and the static conductive rod 13 is fixedly connected with the static end cover 14. The end of the static conductive rod 13 far from the static contact 9 is provided with a static outlet terminal 15. The static contact 9 is drum-shaped, the upper and lower surfaces are round or oval, and the side surface is arc-shaped protruding outwards. The diameter of the stationary contact 9 is larger than the diameter of the stationary conducting rod 13.
The movable conductor element comprises a movable conducting rod 1 and a movable contact 8, and the movable conducting rod 1 is connected with the movable contact 8. The movable conducting rod 1 extends into the insulating cavity from an opening of the driven end cover 4. The moving contact 8 and a part of the moving conducting rod 1 are arranged in the insulating cavity. The movable conducting rod 1 is connected with the movable end cover 4 through the guide sleeve 3 provided with the fixing ring 2, and the movable conducting rod 1 is arranged to move along the axis direction of the sleeve body 11, so that the movable contact 8 and the static contact 9 can be contacted and separated. The moving contact 8 is drum-shaped, the upper and lower surfaces of the moving contact are circular or elliptical, and the side surface of the moving contact is arc-shaped and protrudes outwards. The diameter of the movable contact 8 is larger than that of the movable conducting rod 1. The movable conducting rod 1 is provided with a corrugated pipe 5 at the periphery.
The auxiliary delay switch comprises a conductive sleeve 7 and a conductive elastic sheet 16, and the auxiliary delay switch is arranged in the insulating cavity. The conductive sleeve 7 is provided with an upper opening and a lower opening. The upper opening is connected with the static conductive rod 13 in an insulating way. The lower opening is connected with the movable conducting rod 1 in an insulating way through a corrugated pipe 5. The conductive sleeve 7, the movable conductive rod 1 and the static conductive rod 13 form an insulating medium chamber, and the insulating medium chamber is filled with insulating medium. The static contact 8 and the moving contact 9 are arranged in the insulating medium chamber. The conductive spring pieces 16 comprise two groups and are arranged on two sides of the movable contact 8. One end of the conductive elastic sheet 16 is fixedly connected with the conductive sleeve 7, and the conductive elastic sheet 16 can be contacted with the movable contact 8. When the moving contact 8 and the static contact 9 are separated to the maximum displacement, the other end of the conductive elastic sheet 16 is contacted with the conductive sleeve 7 under the pressure action of the moving contact 8, so that the auxiliary delay switch is in an off state.
The periphery of the corrugated pipe 5 is also provided with a return spring 6, one end of the return spring 6 is connected with the conductive sleeve 7, and the other end is connected with the movable end cover 4.
The nonlinear resistor 12 is formed by compounding nano zinc oxide and nano silicon carbide. The non-linear resistor 12 is disposed within the insulating chamber. One end of the nonlinear resistor 12 is electrically connected with the static conductive rod 13, and the other end is electrically connected with the conductive sleeve 7.
The series circuit formed by the nonlinear resistor 12 and the auxiliary delay switch is arranged at two ends of the movable conductor element and the static conductor element. When the circuit normally operates, the moving contact 9 and the fixed contact 8 are in close contact, the resistance is zero, the operating current passes through the moving contact 9 and the fixed contact 8, and no current flows through the nonlinear resistor 12. When the operation circuit needs to be disconnected, the electrical switch receives a disconnection command, the movable contact 9 displaces, the insulating medium rapidly invades between the movable contact 9 and the static contact 8 to enable the resistance of the movable contact to increase suddenly, the voltage at two ends of the nonlinear resistor 12 is rapidly increased and conducted, and the current flows through the nonlinear resistor 12. The non-linear resistor 12 is in a low resistance state when no current flows, and the resistance is instantly increased when current flows, so that the non-linear resistor 12 can rapidly increase the resistance within milliseconds under the action of the current, and the current is cut off. Within the millisecond time, the electric switch has completed the whole process of moving the moving contact 9, the moving contact 9 and the static contact 8 have reached the maximum displacement of separation, and the electric switch realizes the arc-free breaking. When the moving contact 9 reaches the maximum displacement separated from the static contact 8, the two ends of the conductive elastic sheet 16 are connected with the conductive sleeve 7, so that the auxiliary delay switch is in a disconnected state, and the load side is not electrified any more after the electrical switch is disconnected. On the contrary, when the circuit is in the shutdown stateWhen the operation state is to be changed, when the moving contact 9 and the static contact 8 of the electric switch are closed, the closing current flows through the nonlinear resistor 12 in the time period when the nonlinear resistor 12 is conducted, and no electric arc is generated between the moving contact 9 and the static contact 8. After the moving contact 9 and the static contact 8 are contacted, the nonlinear resistor RfThe circuit will be naturally cut off and the circuit will enter normal operation.
Example 2
FIG. 1 is a schematic circuit diagram of an electrical switch of the present invention; fig. 3 is a schematic view of the mechanism of another electrical switching apparatus according to the present invention. The electrical switchgear of this embodiment includes an insulating housing, a moving conductor element, a stationary conductor element, a non-linear resistor 12, and an auxiliary delay switch.
The insulating shell comprises a sleeve body 11, a movable end cover 4 and a static end cover 14. The movable end cover 4 and the static end cover 14 are respectively arranged at two ends of the sleeve body 11. The moving end cap 4 is provided with a moving end cap opening and the stationary end cap 14 is provided with a stationary end cap opening. The sleeve body 11, the movable end cover 4 and the static end cover 14 form an insulating cavity.
The static conductor element comprises a static conductive rod 13 and a static contact 9, the static contact 9 comprises an insulating positioning device 17 and a conductor ring 18, the insulating positioning device 17 is connected with the conductor ring 18, and the conductor ring 18 is connected with the static conductive rod 13. The insulating positioning device 17 is in a quincunx shape and is provided with a plurality of positioning claws, and each positioning claw is provided with a bulge so as to fix the moving contact 8. The static conductive rod 13 extends into the insulating chamber from the opening of the static end cover 14. The stationary contact 9 and a part of the stationary conducting rod 13 are arranged in the insulating chamber. The diameter of the part of the static conductive rod 13 extending into the insulating cavity is the same as or close to the inner diameter of the opening of the static end cover 14, the diameter of the part of the static conductive rod 13 outside the insulating cavity is larger than the inner diameter of the opening of the static end cover 14, and the static conductive rod 13 is fixedly connected with the static end cover 14. The end of the static conductive rod 13 far from the static contact 9 is provided with a static outlet terminal 15.
The moving conductor element comprises a moving conducting rod 1 and a moving contact 8. The movable contact 8 includes a terminal portion and a connecting portion. The connecting part is connected with the movable conducting rod 1. The end head part is a hemisphere, and the connecting part is a cylinder. The diameter of the end head portion is larger than that of the connecting portion. The movable conducting rod 1 extends into the insulating cavity from an opening of the driven end cover 4. The moving contact 8 and a part of the moving conducting rod 1 are arranged in the insulating cavity. The movable conducting rod 1 is connected with the movable end cover 4 through the guide sleeve 3 provided with the fixing ring 2, and the movable conducting rod 1 is arranged to move along the axis direction of the sleeve body 11, so that the end head part of the movable contact 8 can be contacted with and separated from the conductor ring 18. The movable conducting rod 1 is provided with a corrugated pipe 5 at the periphery.
The auxiliary delay switch, which comprises a conductive sleeve 7 and a conductive ring 19, is disposed within the insulating chamber. The conductive sleeve 7 is provided with an upper opening and a lower opening. The upper opening is connected with the static conductive rod 13 in an insulating way. The lower opening is electrically connected with the connecting part of the movable contact 8. The conductive sleeve 7, the movable contact 8 and the static conductive rod 13 form an insulating medium chamber, and the insulating medium chamber is filled with insulating medium. The static contact 8 and the moving contact 9 are arranged in the insulating medium chamber. The conducting ring 19 is arranged on the periphery of the movable contact 8. When the moving contact 8 and the static contact 9 are separated to the maximum displacement, the conducting ring 19 is contacted with the conducting sleeve 7, so that the auxiliary delay switch is in an off state.
The periphery of the corrugated pipe 5 is also provided with a return spring 6, one end of the return spring 6 is connected with the conductive sleeve 7, and the other end is connected with the movable end cover 4.
The nonlinear resistor 12 is formed by compounding nano zinc oxide and nano silicon carbide. The non-linear resistor 12 is disposed within the insulating chamber. One end of the nonlinear resistor 12 is electrically connected with the static conductive rod 13, and the other end is electrically connected with the conductive sleeve 7.
When the moving contact 9 reaches the maximum displacement separated from the static contact 8, the conducting ring 19 is in contact with the conducting sleeve 7, so that the auxiliary delay switch is in a disconnected state, and the load side is not electrified any more after the electric switch is disconnected.
The present invention is not limited to the above-described embodiments, and any variations, modifications, and substitutions which may occur to those skilled in the art may be made without departing from the spirit of the invention.

Claims (10)

1. An electrical equipment switch device is characterized by comprising an insulating shell, a movable conductor element, a static conductor element, a nonlinear resistor and an auxiliary delay switch;
the insulating shell comprises a sleeve body, a movable end cover and a static end cover, the movable end cover and the static end cover are respectively arranged at two ends of the sleeve body, the movable end cover is provided with a movable end cover opening, the static end cover is provided with a static end cover opening, and the sleeve body, the movable end cover and the static end cover form an insulating cavity;
the static conductor element comprises a static conductive rod and a static contact, and the static conductive rod is connected with the static contact; the static conductive rod extends into the insulating cavity from the opening of the static end cover and is fixedly connected with the opening of the static end cover; at least one part of the static contact and the static conducting rod is arranged in the insulating cavity;
the movable conductor element comprises a movable conducting rod and a movable contact, and the movable conducting rod is connected with the movable contact; the movable conducting rod extends into the insulating cavity from the opening of the movable end cover, at least one part of the movable contact and the movable conducting rod are arranged in the insulating cavity, and the movable conducting rod can move along the axial direction of the sleeve body, so that the movable contact is contacted with and separated from the fixed contact;
the auxiliary delay switch is connected with the nonlinear resistor in series, one end of a series circuit formed by the auxiliary delay switch and the nonlinear resistor is electrically connected with the movable conductor element, and the other end of the series circuit is electrically connected with the static conductor element;
wherein the state of the auxiliary delay switch is set to be determined by the position of the movable contact; when the moving contact and the static contact are separated to the maximum displacement, the auxiliary time delay switch is in a disconnected state; when the moving contact is at other positions, the auxiliary delay switches are all in a closed state.
2. The electrical switching apparatus of claim 1 wherein the auxiliary delay switch and the non-linear resistor are both disposed within an insulating chamber.
3. The electrical switching apparatus of claim 1 wherein said movable contact has a diameter greater than a diameter of said movable conductive rod.
4. The electrical switching apparatus of claim 3 wherein the auxiliary delay switch comprises a conductive sleeve and a conductive dome;
the conductive sleeve is connected with the movable conductive rod and the static conductive rod in an insulating way, the conductive sleeve, the movable conductive rod and the static conductive rod form an insulating medium chamber, and at least one part of the static contact and at least one part of the movable contact are arranged in the insulating medium chamber; the nonlinear resistor is electrically connected with the conductive sleeve;
one end of the conductive elastic sheet is fixedly connected with the conductive sleeve, and the conductive elastic sheet is arranged to be in contact with the moving contact; when the moving contact and the static contact are separated to the maximum displacement, the other end of the conductive elastic sheet is contacted with the conductive sleeve under the pressure action of the moving contact, so that the auxiliary delay switch is in an off state.
5. The electrical switching apparatus of claim 1 wherein the movable contact includes a terminal portion and a connecting portion; the connecting part is connected with the movable conducting rod; the diameter of the end head portion is larger than that of the connecting portion.
6. An electrical switching apparatus according to claim 5 wherein the auxiliary delay switch comprises a conductive sleeve and a conductive ring;
the conductive sleeve is electrically connected with the connecting part of the moving contact and is in insulated connection with the static conductive rod; the conductive sleeve, the moving contact and the static conductive rod form an insulating medium chamber, at least one part of the static contact and at least one part of the moving contact are arranged in the insulating medium chamber, and the nonlinear resistor is electrically connected with the conductive sleeve;
the conducting ring is arranged on the periphery of the moving contact; when the moving contact and the static contact are separated to the maximum displacement, the conducting ring is contacted with the conducting sleeve, so that the auxiliary delay switch is in a disconnected state.
7. The electrical apparatus switch device according to claim 1, wherein the movable conducting rod is connected with the opening of the movable end cover through a guide sleeve provided with a fixed ring; the diameter of one end, far away from the static contact, of the static conductive rod is larger than the inner diameter of the opening of the static end cover.
8. The electrical switching apparatus of claim 1 wherein an end of the static conductive rod away from the static contact is provided with a static outlet.
9. The electrical apparatus switch device according to claim 4 or 6, characterized in that a corrugated pipe is arranged outside the movable conducting rod, and a return spring is arranged outside the corrugated pipe; one end of the reset spring is connected with the conductive sleeve, and the other end of the reset spring is connected with the movable end cover.
10. The electrical switching apparatus of claim 1 wherein the non-linear resistor is formed from a composite of nano zinc oxide and nano silicon carbide.
CN202010300926.8A 2020-04-16 2020-04-16 Electrical equipment switch device Pending CN111370262A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010300926.8A CN111370262A (en) 2020-04-16 2020-04-16 Electrical equipment switch device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010300926.8A CN111370262A (en) 2020-04-16 2020-04-16 Electrical equipment switch device

Publications (1)

Publication Number Publication Date
CN111370262A true CN111370262A (en) 2020-07-03

Family

ID=71210949

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010300926.8A Pending CN111370262A (en) 2020-04-16 2020-04-16 Electrical equipment switch device

Country Status (1)

Country Link
CN (1) CN111370262A (en)

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