Isolation load switch

Abstract

The utility model discloses an isolation load switch, belongs to the technical field of isolation load switches, and solves the problem that a rotating handle of the isolation load switch can still rotate once a lockset is violently broken, so that the locking influence of the lockset on the isolation load switch needs to be eliminated. Comprising a shell, a plurality of static contacts arranged in the shell, a power connection plate rotationally arranged in the shell and a plurality of movable contacts arranged on the power connection plate, a transmission shaft which penetrates through the shell and is rotationally arranged is fixedly connected to the power connection plate, the transmission shaft is arranged in a telescopic mode, and a rotating sleeve arranged on the outer ring of the transmission shaft in a sleeving mode is fixedly connected to the shell. Operating authority control is achieved through the card reader and the electronic tag card, after the card is read, the MCU activates the triode, the electrified electromagnet attracts the metal shaft, an operator rotates the rotating handle to drive the power connection plate, and contact is achieved; when the card is not read, the rotating handle cannot operate the power connection plate, and unauthorized use is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of isolating load switch, especially to an isolating load switch. BACKGROUND

[0002] The isolating switch is a kind of switch equipment for ensuring safety isolation in circuit, and its core function is to provide safe working environment for staff when circuit is maintained or overhauled.It can provide obvious off point, ensure that circuit is completely powered off, prevent current flow and maximumly reduce the risk of electric shock.The isolating switch establishes reliable insulation gap after switching off, and separates the equipment or line needing overhauling from power supply to ensure the safety of overhauling personnel and equipment.

[0003] The main features of isolating switch include simple structure, convenient operation, safe and reliable, and it is widely used in power system, industrial production, building, transportation and other fields.In power system, isolating switch is mainly used for switching, control and protection function of power line, and it is also used for isolating fault circuit to ensure the stable operation of power system.

[0004] At present, the isolating switch is usually locked, so that the handle cannot be further rotated, thereby avoiding the isolating load switch being operated by non-specialized personnel, and for the lock, once it is forcibly broken, the handle of the isolating load switch can still be rotated, so it is necessary to exclude the locking effect of the lock on the isolating load switch.

[0005] Therefore, an isolating load switch is proposed to solve or alleviate the above problems. CONTENT OF UTILITY MODEL

[0006] The utility model aims at solving the shortcomings in the prior art and provides an isolating load switch.

[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0008] An isolating load switch, comprising a shell, a plurality of static contacts arranged in the shell, an electrically connected plate rotatably arranged in the shell, and a plurality of dynamic contacts arranged on the electrically connected plate, the electrically connected plate is fixedly connected with a transmission shaft penetrating through the shell and rotatably arranged, the transmission shaft is telescopically arranged, the shell is fixedly connected with a rotating sleeve sleeved on the outer circle of the transmission shaft, the rotating sleeve is rotatably connected with a handle, the shell is provided with a card reader, the card reader is coupled with a control circuit, and the control circuit controls the transmission shaft to be in transmission connection with the handle after elongation.

[0009] Preferably, the cross section of the handle is T-shaped.

[0010] Preferably, a rectangular slot is formed at one end of the handle towards the sleeve, a metal shaft with a length less than the depth of the rectangular slot is slidably connected in the rectangular slot, and a spring is fixedly connected between the metal shaft and the bottom of the rectangular slot.

[0011] Preferably, an electromagnet is arranged in the housing outside the transmission shaft, the control circuit is coupled with the electromagnet, and the control circuit is controlled to control the on-off of the electromagnet.

[0012] Preferably, the control circuit comprises an MCU and a triode switch, the output of the MCU is coupled with the base of the triode switch, the collector of the triode switch is connected to the back of the electromagnet and is electrically arranged, and the emitter of the triode switch is grounded.

[0013] Preferably, the card reader comprises a minimum system based on an MFRC522 chip, and the output of the minimum system is coupled with the input of the MCU.

[0014] The utility model has the following beneficial effects:

[0015] In the application of the utility model, the card reader and the corresponding electronic tag card are provided, the operator only needs to use the electronic tag card to manually swipe the card on the card reader, the card reader can read the card information and send the card reading signal to the MCU, the MCU then outputs the control signal to the base of the triode switch, the triode is turned on, the current is allowed to flow through the electromagnet, the magnetic force is generated to attract the metal shaft on the handle, the magnetic force overcomes the elastic force of the spring, and the spring is elastically deformed to ensure that the metal shaft is close to the end surface of the transmission shaft. In this way, when the operator operates the handle, the metal shaft and the transmission shaft can drive the power plate to rotate, and the contact of the moving contact and the stationary contact is realized. If there is no card reading operation, the rotation of the handle cannot drive the power plate, and unauthorized operation is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a wiring diagram of the card reader in the utility model;

[0019] Figure 3 It is a wiring diagram of the control circuit in the utility model.

[0020] 1, housing; 2, rotating sleeve; 3, rotating handle; 4, card reader. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0023] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0024] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0025] In addition, the terms "first", "second", "third" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided", "mounted", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] An isolated load switch, such as Figure 1 As shown in the figure, it comprises a shell 1, a plurality of static contacts arranged in the shell 1, a power contact plate rotatably arranged in the shell 1, and a plurality of dynamic contacts arranged on the power contact plate, the power contact plate is fixedly connected with a transmission shaft penetrating through the shell 1 and rotatably arranged, the transmission shaft is telescopically arranged, the shell 1 is fixedly connected with a rotating sleeve 2 sleeved on the outer circle of the transmission shaft, the rotating sleeve 2 is rotatably connected with a handle 3, the shell 1 is provided with a card reader 4, the card reader 4 is coupled with a control circuit, and the control circuit controls the transmission shaft to be in transmission connection with the handle 3 after being elongated.

[0028] The handle 3 is T-shaped in cross section, one end of the handle 3 towards the rotating sleeve 2 is provided with a rectangular groove, a metal shaft with a length less than the groove depth of the rectangular groove is slidably connected in the rectangular groove, a spring is fixedly connected between the metal shaft and the groove bottom of the rectangular groove, an electromagnet is arranged in the shell 1 and located on the outer circle of the transmission shaft, the control circuit is coupled with the electromagnet, and the control circuit is controlled to control the on-off of the electromagnet.

[0029] As shown in the figure Figure 2 And Figure 3 The control circuit comprises an MCU and a triode switch, the output end of the MCU is coupled with the base of the triode switch, the collector of the triode switch is connected with the electromagnet and is arranged to be powered on, the emitter of the triode switch is arranged to be grounded, and the card reader 4 comprises a minimum system based on an MFRC522 chip, and the output end of the minimum system is coupled with the input end of the MCU.

[0030] When the utility model is actually applied, because the card reader 4 is arranged, the card reader 4 is also configured with a corresponding electronic tag card, when the operator actually needs to apply the isolated load switch, the operator only needs to manually make the electronic tag card be read by the card reader 4, and the card reader 4 can send a card reading signal after reading the information of the electronic tag card, the card reading signal is in turn given to the MCU, the MCU sends a corresponding control signal to the base of the triode switch, so that the collector and the emitter of the triode switch are turned on, so that the electromagnet can be powered on, the electromagnet generates a magnetic force when powered on, and then generates an attractive force on the metal shaft on the handle 3, the attractive force overcomes the elastic force required by the spring deformation, and the spring also elastically deforms in the process, so that the metal shaft can tightly abut against the end face of the transmission shaft, when the operator holds the handle 3 of the T-shaped cross section at this time, the handle 3 can drive the power contact plate to rotate through the sequence of the metal shaft and the transmission shaft, so that the dynamic contact and the static contact are in contact, but if the operator does not need to use it, in the case that the card reader 4 does not read the card, no matter how the operator rotates the handle 3 on the rotating sleeve 2, the power contact plate cannot be controlled to rotate, so as to avoid the situation that the power contact plate is operated by others.

[0031] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An isolated load switch, comprising: The utility model relates to a contactor, including shell (1), a plurality of static contact points set in shell (1), the contact board of rotation setting in shell (1) and a plurality of dynamic contact points set on contact board, fixedly connected with the transmission shaft that penetrates shell (1) and rotatable setting on contact board, the transmission shaft can be telescopic setting, fixedly connected with the sleeve (2) of the sleeve of transmission shaft outer circle on shell (1), rotatable connection has the handle (3) on sleeve (2), be provided with card reader (4) on shell (1), card reader (4) is coupled with control circuit, control circuit controls transmission shaft after transmission connection on handle (3) elongation.

2. An isolating load break switch according to claim 1, characterized in that The cross section of the handle (3) is T-shaped.

3. An isolating load switch according to claim 2, wherein The end of the handle (3) towards the sleeve (2) is provided with a rectangular slot, a metal shaft with a length less than the depth of the rectangular slot is slidably connected in the rectangular slot, and a spring is fixedly connected between the metal shaft and the bottom of the rectangular slot.

4. An isolating load switch according to claim 3, wherein An electromagnet is arranged in the shell (1) outside the transmission shaft, the control circuit is coupled with the electromagnet, and the control circuit is controlled to control the on-off of the electromagnet.

5. An isolating load switch according to claim 4, wherein The control circuit includes an MCU and a transistor switch, the output of the MCU is coupled with the base of the transistor switch, the collector of the transistor switch is connected with the electromagnet and then connected with the power supply, and the emitter of the transistor switch is connected with the ground.

6. An isolating load switch according to claim 5, wherein The card reader (4) includes a minimum system based on the MFRC522 chip, and the output of the minimum system is coupled with the input of the MCU.

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