Vacuum AC contactor with motor comprehensive protection function

Abstract

The invention provides a vacuum alternating current contactor with a motor comprehensive protection function, which comprises a supporting assembly component, a fixed adapter component, a movable adapter component, an elastic breaking component, an electromagnetic switching-on component, a vacuum arc extinguishing component, an operation control component, a control switch component and a state display component, the vacuum alternating-current contactor integrates the main loop, the control loop, the protection loop and the display system into a whole to serve as a component capable of being independently used, is complete in connection, disconnection and protection control, high in integration level, low in manufacturing cost, high in production efficiency, wide in application range, light in weight, convenient to maintain, replace and transfer and suitable for popularization and application. The problems that many faults are caused by many discrete components and installation space is occupied are solved, and the working reliability is improved.

Description

Technical Field

[0001] The invention relates to a vacuum AC contactor, in particular to a vacuum AC contactor with comprehensive protection function. Background Art

[0002] The vacuum contactor uses a vacuum arc extinguishing chamber to extinguish arcs, and is used to frequently connect and disconnect normal working currents. It is usually used to connect and disconnect medium and low voltage AC motors that are frequently started and stopped at a long distance. Patent document CN203118858U discloses a new vacuum AC contactor, which includes a contactor body, a reaction spring, an L-shaped crank arm is provided in the contactor body, and an adjustment screw and a gasket are also provided in the contactor body. One end of the reaction spring is connected to the L-shaped crank arm, and the other end is connected to the gasket. The gasket is connected to the screw, and the screw is partially exposed from the contactor body, and a grip is connected to the exposed part of the screw. The vacuum AC contactor can control the expansion and contraction of the spring by adjusting the adjustment screw, thereby improving the stability and service life of the mechanism. It mainly solves the problem that the elasticity of the reaction spring in the contactor is weakened after being stretched and compressed many times, and the contacts cannot be disconnected in time, which seriously affects the performance of the contactor. However, this type of vacuum contactor is particularly prone to damage when used in explosion-proof magnetic starters and explosion-proof vacuum starters for mining, and the products contain discrete components: isolation reversing switches, transformers, vacuum AC contactors, integrated protector bodies, etc. In order to install these components, the electrical clearance and creepage distance need to be increased when designing explosion-proof enclosures, resulting in increased equipment size, increased weight, increased costs, and difficulty in transportation. Therefore, it is necessary to optimize the structure of this contactor to overcome the above defects. Summary of the invention

[0003] The purpose of the present invention is to provide a vacuum AC contactor with a comprehensive motor protection function to solve the problems of multiple faults caused by discrete components, occupying installation space, adding intermediate connections, and troublesome disassembly and assembly.

[0004] The technical solution adopted by the present invention to solve the technical problem is:

[0005] A vacuum AC contactor, comprising:

[0006] A support assembly member having an installation space therein;

[0007] A fixed matching component, which is installed in the supporting assembly component through a fixed connection structure and is connected to a driving power source through a line, and is kept fixed on the supporting assembly component;

[0008] The movable matching component is installed in the supporting assembly component through a movable connection structure and is connected to the load through a line. The movable matching component can switch the installation state on the supporting assembly component. The fixed matching component is adapted to the movable matching component. The movable matching component can be switched to the connected and disconnected state of the fixed matching component, so that the load is connected or disconnected with the driving power supply, thereby operating or stopping the load;

[0009] An elastic breaking component, which is installed in the supporting assembly component and cooperates with the movable matching component, and the elastic breaking component drives the movable matching component to be separated from the fixed matching component;

[0010] An electromagnetic connection component is installed in the supporting assembly component and cooperates with the movable matching component. The electromagnetic connection component drives the movable matching component to connect with the fixed matching component;

[0011] A vacuum arc extinguishing component, which is installed in the supporting assembly component and cooperates with the fixed matching component and the movable matching component, so that the fixed matching component and the movable matching component are in a vacuum environment to eliminate the arc generated between the fixed matching component and the movable matching component;

[0012] Also includes:

[0013] An operation control component is installed in the support assembly component and cooperates with the fixed matching component and the movable matching component. The operation control component obtains the operation parameters of the movable matching component and the fixed matching component and performs protective control on their operation states;

[0014] A control switch component is installed in the support assembly component, the input end of which is connected to the control power supply through a line, and the output end of which is connected to the electromagnetic connection component and the operation control component through a line, and the control switch component supplies power to the electromagnetic connection component and the operation control component;

[0015] A status display component is installed in the support assembly component or outside the support assembly component, and is connected to the operation control component. The status display component displays the operation parameters obtained by the operation control component.

[0016] Specifically, the support assembly component includes:

[0017] The supporting frame is made of insulating material and has an installation space inside.

[0018] The fixed connecting components include:

[0019] A fixed joint is provided with a group of fixed joints, each fixed joint is fixedly installed in the support frame and is connected to the phase line of the driving power supply through a line, and the driving power supply supplies power to the fixed joint.

[0020] The movable matching components include:

[0021] The movable joint is installed in the supporting frame through a transmission crank arm and can move in the supporting frame to connect or disconnect with the fixed joint. It is connected with the phase line of the load through the line to supply power to the load.

[0022] The elastic breaking member comprises:

[0023] A disconnecting spring is provided, wherein a group of disconnecting springs are respectively installed in the supporting frame and cooperate with the movable joint, and the movable joint is driven by the disconnecting spring to disconnect from the fixed joint.

[0024] The electromagnetic connection component includes:

[0025] The electromagnetic coil is provided with a group, each electromagnetic coil is installed in the supporting frame respectively and cooperates with the movable joint, and the movable joint is driven by the electromagnetic coil to connect with the fixed joint.

[0026] Vacuum arc extinguishing components include:

[0027] The vacuum tube body is provided with a group, each vacuum tube body is respectively installed in the supporting frame and covers the outside of the movable joint and the fixed joint, so that the movable joint and the fixed joint are in a vacuum environment.

[0028] The operation control components include:

[0029] An information collector, which is installed in the support frame and cooperates with the fixed joint and the movable joint to collect the current, voltage and leakage information of the fixed joint and the movable joint;

[0030] The integrated protector is installed in the support frame and connected with the information collector and the electromagnetic coil. It controls the operating state of the electromagnetic coil according to the information obtained by the information collector to control the movable joint and the fixed joint to be in the connected or disconnected state.

[0031] The control switch component includes:

[0032] The power supply is installed in the supporting frame, the input end of the power supply is connected with the control power supply through the line, the output end of the power supply is connected with the electromagnetic coil and the integrated protector through the line, and the electromagnetic coil and the integrated protector are powered by the switch converter.

[0033] The status display components include:

[0034] A liquid crystal display is connected to the integrated protector through a line, and the liquid crystal display displays the operating status of the integrated protector and the information obtained by the information collector.

[0035] The advantages of the present invention are:

[0036] The vacuum AC contactor integrates the main circuit, control circuit, protection circuit and display system into one independently usable component. It has complete connection, disconnection and protection control, high integration, reduced production cost and improved production efficiency. It has a wide range of uses, is light in weight, and is easy to repair, replace and transport. It solves the problems of multiple failures caused by multiple discrete components and occupying installation space, and improves working reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is one of the structural schematic diagrams of the vacuum AC contactor proposed by the present invention;

[0038] Figure 2 This is the second structural diagram of the vacuum AC contactor;

[0039] Figure 3 This is the circuit principle diagram of the vacuum AC contactor;

[0040] Figure 4 This is a schematic diagram of the vacuum AC contactor in use. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0042] like Figure 1 to Figure 3As shown, the vacuum AC contactor proposed in the present invention includes a supporting assembly component, a fixed matching component, a movable matching component, an elastic disconnecting component, an electromagnetic connection component, a vacuum arc extinguishing component, an operation control component, a control switch component and a status display component. The supporting assembly component has an installation space. The fixed matching component is installed in the supporting assembly component through a fixed connection structure and is connected to a driving power supply through a line. It remains fixed on the supporting assembly component. The movable matching component is installed in the supporting assembly component through a movable connection structure and is connected to a load through a line. It can switch the installation state on the supporting assembly component. The fixed matching component is adapted to the movable matching component. The movable matching component can be switched to the connection and disconnection state of the fixed matching component, so that the load is connected or disconnected with the driving power supply, thereby making the load run or stop. The elastic disconnecting component is installed in the supporting assembly component and cooperates with the movable matching component. The movable matching component is driven by the elastic disconnecting component to disconnect from the fixed matching component. The electromagnetic connection component is installed on the supporting The vacuum arc extinguishing component is installed in the supporting assembly component and cooperates with the movable matching component. The movable matching component is driven by the electromagnetic connection component to connect with the fixed matching component. The vacuum arc extinguishing component is installed in the supporting assembly component and cooperates with the fixed matching component and the movable matching component to place the fixed matching component and the movable matching component in a vacuum environment to eliminate the arc generated between the fixed matching component and the movable matching component. The operation control component is installed in the supporting assembly component and cooperates with the fixed matching component and the movable matching component. The operation control component obtains the operation parameters of the movable matching component and the fixed matching component and performs protective control on their operation status. The control switch component is installed in the supporting assembly component. Its input end is connected to the control power supply through the line, and its output end is connected to the electromagnetic connection component and the operation control component through the line. The control switch component supplies power to the electromagnetic connection component and the operation control component. The state display component can be installed in the supporting assembly component or outside the contactor, such as displaying it in other places by communication. The state display component displays the operation parameters obtained by the operation control component.

[0043] In this embodiment, the support assembly component includes a support frame 100, which is made of insulating material and has an installation space inside.

[0044] The fixed matching component includes a fixed joint 200, and a group of fixed joints are provided. Each fixed joint is fixedly installed in the support frame and is connected to the phase line of the driving power supply through a line, and the driving power supply supplies power to the fixed joint.

[0045] The movable coupling component includes a movable joint 300, which is installed in the support frame through a transmission crank arm and can move in the support frame to connect or disconnect with the fixed joint. It is connected with the phase line of the load through the line to supply power to the load.

[0046] The elastic disconnecting member comprises a disconnecting spring 400, and a group of disconnecting springs are provided. Each disconnecting spring is respectively installed in the supporting frame and cooperates with the movable joint. The disconnecting spring drives the movable joint to be disconnected from the fixed joint.

[0047] The electromagnetic connection component includes an electromagnetic coil 500. A group of electromagnetic coils are provided. Each electromagnetic coil is installed in a supporting frame and cooperates with a movable joint. The electromagnetic coil drives the movable joint to connect with the fixed joint.

[0048] The vacuum arc extinguishing component includes a vacuum tube body 600, and a group of vacuum tube bodies are provided. Each vacuum tube body is installed in a supporting frame and covers the outside of the movable joint and the fixed joint, so that the movable joint and the fixed joint are in a vacuum environment.

[0049] The operation control component includes an information collector 710 and an integrated protector 720. The information collection module is installed in the support frame and cooperates with the fixed joint and the movable joint. In this embodiment, the information collector includes a current collection module, which can collect the current, voltage and leakage information of the fixed joint and the movable joint. The integrated protector is installed in the support frame and connected to the information collector and the electromagnetic coil. It controls the operation state of the electromagnetic coil according to the information obtained by the information collector to control the movable joint and the fixed joint to be in a connected or disconnected state.

[0050] The control switch component includes a switch converter 800, which is installed in a support frame. Its input end is connected to the control power supply through a line, and its output end is connected to the electromagnetic coil and the integrated protector through a line. The switch converter supplies power to the electromagnetic coil and the integrated protector.

[0051] The status display component includes a liquid crystal display 900, which is connected to the integrated protector through a line. The liquid crystal display displays the operating status of the integrated protector and displays the information obtained by the information collector.

[0052] like Figure 3As shown, the vacuum AC contactor is suitable for working conditions with AC 50Hz, main circuit rated voltage 1140V, and rated current below 630A; except for the intermediate relay K and the start button SB, all the items listed in the figure are installed in the vacuum AC contactor frame; L1, L2, and L3 are connected to the main circuit power supply, and U, V, and W are connected to the motor. When the main contacts of the vacuum AC contactor KM are closed, the motor is powered on; UR is the power supply, which supplies the voltage to the integrated protector, and the output 5Vdc voltage is the power supply voltage and display voltage of the integrated protector; ZB is the integrated protector. The current signal is obtained through the current sampling module TA1...3, which is used for display, short circuit protection, overload protection, and current phase loss protection. The voltage signal is obtained through the UR switching power supply, which is used for display, overvoltage protection, and undervoltage protection. The leakage lock signal enters the ZB integrated protector through the W terminal, KM-4, and KM-5 normally closed points. When powered on, the insulation value on the load side is automatically detected. When leakage occurs, the ZB integrated protector will be activated and cannot be started. When the leakage phenomenon is eliminated, it will automatically return to the standby state and wait for starting. The key function is used for parameter setting and system reset. The LCD is a Chinese LCD screen used to display the fault status and working status of the KM vacuum AC contactor, and form a human-computer interaction with the keys. When the ZB integrated protector detects a fault, it will output an action, and the KM vacuum AC contactor cannot be started or automatically disconnects and stops. The communication function is the standard 485 communication MODBUS RTU03 / 06 communication protocol; the SB start button and the intermediate relay K are external.

[0053] like Figure 4 As shown, the vacuum AC contactor is suitable for the occasions with working current of 1140V and below 400A. It uses 400A / 1140V isolation reversing switch QS and vacuum AC contactor KM to form the main circuit, uses 1140(660)V / 220V-24V control transformer, intermediate relay, start-stop button, etc. to form the control circuit, and LCD128×64 Chinese display and 3 buttons to form the display and keyboard circuit.

[0054] The vacuum AC contactor integrates the main circuit, control circuit, protection circuit and display system into one independently usable component. It has complete connection, disconnection and protection control, high integration, reduced production cost and improved production efficiency. It has a wide range of uses, is light in weight, and is easy to repair, replace and transport. It solves the problems of multiple failures caused by multiple discrete components and occupying installation space, and improves working reliability.

[0055] In the description of the present invention, it should be noted that when terms such as "upper", "lower", "inner", "outer", "left", "right" and the like indicating orientation or positional relationship appear, it should be understood that the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the equipment or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, when terms such as "first" and "second" appear, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, terms such as "installation", "setting", and "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A vacuum AC contactor with comprehensive motor protection function, comprising: A support assembly member having an installation space therein; A fixed matching component, which is installed in the supporting assembly component through a fixed connection structure and is connected to a driving power source through a line, and is kept fixed on the supporting assembly component; The movable matching component is installed in the supporting assembly component through a movable connection structure and is connected to the load through a line. The movable matching component can switch the installation state on the supporting assembly component. The fixed matching component is adapted to the movable matching component. The movable matching component can be switched to the connected and disconnected state of the fixed matching component, so that the load is connected or disconnected with the driving power supply, thereby operating or stopping the load; An elastic breaking component, which is installed in the supporting assembly component and cooperates with the movable matching component, and the elastic breaking component drives the movable matching component to be separated from the fixed matching component; An electromagnetic connection component, which is installed in the supporting assembly component and cooperates with the movable matching component, and the electromagnetic connection component drives the movable matching component to connect with the fixed matching component; A vacuum arc extinguishing component, which is installed in the supporting assembly component and cooperates with the fixed matching component and the movable matching component, so that the fixed matching component and the movable matching component are in a vacuum environment to eliminate the arc generated between the fixed matching component and the movable matching component; It is characterized by further comprising: An operation control component is installed in the support assembly component and cooperates with the fixed matching component and the movable matching component. The operation control component obtains the operation parameters of the movable matching component and the fixed matching component and performs protective control on their operation states; A control switch component is installed in the supporting assembly component, wherein the input end thereof is connected to the control power supply through a line, and the output end thereof is connected to the electromagnetic connection component and the operation control component through a line, and the control switch component supplies power to the electromagnetic connection component and the operation control component.

2. A vacuum AC contactor with comprehensive motor protection function according to claim 1, characterized in that: The operation control components include: An information collector, which is installed in the supporting assembly component and cooperates with the fixed joint and the movable joint to collect the current, voltage and leakage information of the fixed joint and the movable joint; The integrated protector is installed in the supporting assembly component and is connected to the information collector and the electromagnetic connection component. It controls the operating state of the electromagnetic connection component according to the information obtained by the information collector to control the movable joint and the fixed joint to be in a connected or disconnected state.

3. A vacuum AC contactor with comprehensive motor protection function according to claim 2, characterized in that: The control switch component includes: The power supply is installed in the supporting assembly component, and its input end is connected to the control power supply through the line, and its output end is connected to the electromagnetic connection component and its power output part and the integrated protector through the line, that is, the power supply supplies power to the electromagnetic connection component and the integrated protector.

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