A remote control automatic on-off pincer-shaped current sensor device

Abstract

The application discloses a kind of remote control automatic split and combine pincer-shaped current sensor device, including fixed bin, operating handle mechanism and operating lever, the top end of the fixed bin is opened, and is with the handle of pincer-shaped current sensor interference fit, one end of the operating lever is connected with the bottom end of fixed bin;The operating handle mechanism includes guide assembly, movable slider and driving part, the guide assembly is located inside fixed bin, the movable slider is slid on the guide assembly, the driving part is used to drive the movable slider to slide on guide assembly, to press or release the handle of pincer-shaped current sensor in fixed bin, to realize the automatic split and combine of pincer-shaped current sensor further.The application does not need high work, portable and efficient, safe and risk-free, universal and separable, can be operated remotely, can avoid high fall, electric shock, knock and other safety risks, save time and effort, greatly improve work efficiency.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of current measurement, and in particular to a remote-controlled automatic opening and closing clamp-type current sensor device. Background Art

[0002] As a commonly used sensor for current measurement in the power industry, the clamp current sensor does not require disconnecting the tested wire, adopts a non-contact, clamp-on design, and has high precision and high stability, making it widely used in the power instrumentation industry. Current clamp current sensors generally use manual opening and closing of the jaws. When the object to be measured is at a high position, such as in applications such as overhead cable current measurement, high-voltage switch circuit breaker characteristic testing, and high-voltage reactive power compensation capacitor groups in substations, manual installation of the clamp current sensor is generally carried out by climbing poles, ladders, and other high-altitude operations. Safety risks such as falling from heights and electric shock may occur. For some locations with relatively narrow spaces, it is difficult for operators to enter and they are also prone to injuries such as bumps. In summary, the current clamp current sensor brings certain safety risks and work difficulties to the test personnel during the specific application and installation process, and is also relatively time-consuming and labor-intensive. In summary, the existing clamp current transformer has the following disadvantages:

[0003] 1. Traditional clamp-on current transformers rely on manual operation of the handle to open and close the current clamp to clamp in and out of the object being measured. This requires close contact with the object being measured, posing a safety risk of electric shock.

[0004] 2. If the object to be measured is located at a high or narrow place, the operator needs to perform high-altitude operations, which may lead to safety risks such as falling from a height or being hit by sharp objects.

[0005] 3. The installation of traditional clamp-on current transformers requires moving heavy tools such as ladders and tripods. Each test position requires repeated moving and relocating of the climbing tools. The entire process is time-consuming and labor-intensive, greatly increasing safety risks and workload. Summary of the Invention

[0006] The technical problem to be solved by the present invention is: in response to the technical problems existing in the prior art, the present invention provides a remote-controlled automatic opening and closing clamp current sensor device that can operate at high altitudes and automatically open and close remotely.

[0007] In order to solve the above technical problems, the technical solution proposed by the present invention is:

[0008] A remote-controlled automatic opening and closing clamp current sensor device comprises a fixed compartment, an operating handle mechanism and an operating rod. The top end of the fixed compartment is open and has an interference fit with the handle of the clamp current sensor. One end of the operating rod is connected to the bottom end of the fixed compartment. The operating handle mechanism comprises a guide assembly, a movable slider and a driving member. The guide assembly is located inside the fixed compartment, the movable slider is slidably arranged on the guide assembly, and the driving member is used to drive the movable slider to slide on the guide assembly to press or release the handle of the clamp current sensor in the fixed compartment, thereby realizing automatic opening and closing of the clamp current sensor.

[0009] As a further improvement of the above technical solution:

[0010] The driving member includes electric pull rods located on both sides of the fixed compartment, and the telescopic ends of the electric pull rods are connected to the movable slider through a pull rope.

[0011] Pulleys are also provided on both sides of the fixed bin, and the pull rope is wound around the pulleys.

[0012] The utility model also includes a return component for driving the movable slide block to return to an initial position so as to release the clamp current sensor handle in the fixed compartment.

[0013] The return assembly includes a plurality of springs, one end of each spring is connected to the inner side of the fixed compartment, and the other end is connected to the movable slider.

[0014] The operating rod is a telescopic rod or a cascade of multiple rods.

[0015] The device further includes a wireless communication module, a controller, a resistor R1, a resistor R2, a switch Q1, a switch Q2, a relay REL1, a relay REL2, a diode D1, and a diode D2. The wireless communication module is connected to the input end of the controller; the output port IO1 of the controller is connected to the base of the switch Q1 via the resistor R1, and the collector of the switch Q1 is connected to one end of the coil of the relay REL1; the output port IO2 of the controller is connected to the base of the switch Q2 via the resistor R2, and the collector of the switch Q2 is connected to one end of the coil of the relay REL2; The other end of the coil of the relay REL1 is connected to the other end of the coil of the relay REL2 and is also connected to the power supply VDD; the anode of the diode D1 is connected to one end of the coil of the relay REL1, and the cathode of the diode D1 is connected to the other end of the coil of the relay REL1; the anode of the diode D2 is connected to one end of the coil of the relay REL2, and the cathode of the diode D2 is connected to the other end of the coil of the relay REL2; the contact switches of the relay REL1 and the relay REL2 are both located in the power supply circuit of the driving component.

[0016] It also includes a current detection element for detecting the current of the driving element, and the current detection element is connected to the controller.

[0017] The shape of the movable slider matches the shape of the clamp-type current sensor handle, specifically an S-shape.

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] The remote-controlled automatic opening and closing clamp current sensor device of the present invention realizes automatic opening and closing of the clamp current sensor by operating a handle mechanism; the operation of the clamp current sensor at different heights is realized by an operating lever; the present invention does not require operation at heights, is portable and efficient, safe and risk-free, universal and detachable, and can be operated from a distance, which can not only avoid safety risks such as falling from heights, electric shock, and bumps, but also save time and effort, greatly improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural diagram of the device of the present invention in an embodiment.

[0021] Figure 2 It is a main structural diagram of the device of the present invention in an embodiment.

[0022] Figure 3 It is a rear structural diagram of the device of the present invention in an embodiment.

[0023] Figure 4 This is a circuit schematic diagram of an embodiment of the control circuit of the present invention.

[0024] Legend: 1. Fixed compartment; 2. Operating handle mechanism; 21. Guide assembly; 211. Guide rail; 22. Movable slider; 23. Driving part; 231. Electric pull rod; 232. Pull rope; 233. Pulley; 24. Return assembly; 241. Spring; 3. Operating lever; 4. Current sensor; 5. Aviation plug; 6. Control circuit board; 7. Battery. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] like Figure 1-3As shown, the remote-controlled automatic opening and closing clamp current sensor device of an embodiment of the present invention includes a fixed compartment 1, an operating handle mechanism 2 and an operating rod 3. The top of the fixed compartment 1 is open and has an interference fit with the handle of the clamp current sensor 4. One end of the operating rod 3 is connected to the bottom end of the fixed compartment 1; the operating handle mechanism 2 includes a guide assembly 21, a movable slider 22 and a driving member 23. The guide assembly 21 is located inside the fixed compartment 1, and the movable slider 22 is slidably provided on the guide assembly 21. The driving member 23 is used to drive the movable slider 22 to slide on the guide assembly 21 to press or release the handle of the clamp current sensor 4 in the fixed compartment 1, thereby realizing automatic opening and closing of the clamp current sensor 4.

[0027] The clamp-on current transformer has a movable opening made of a magnetic core. The operator pulls the handle to overcome the spring mechanism, causing the jaws to open and engage the measured circuit. When the handle is released, the jaws close under the action of the spring mechanism's restoring force, forming a closed magnetic circuit, thereby achieving current measurement through the principle of electromagnetic induction.

[0028] Specifically, the fixed chamber 1 is composed of two welded front and rear partitions and a shell, forming a rectangular handle barrel with an upper opening. Its dimensions are designed to be comparable to the current clamp handle. When inserting the handle, a certain resistance must be overcome to form an interference fit. To remove the handle, the current clamp is simply pulled upward. The guide assembly 21 includes two upper and lower optical axis guide rails 211. One end of the guide rail 211 is welded to the inside of the fixed chamber 1, while the other end is suspended and just contacts the current clamp handle.

[0029] Specifically, the driving member 23 includes a card-type electric pull rod 231 located on both sides of the fixed bin 1, and the telescopic end of the electric pull rod 231 is connected to the movable slider 22 through a fiber pull rope 232. Pulleys 233 are provided on both sides of the fixed bin 1, and the pull rope 232 is wound around the pulley 233. The pulley 233 is a rubber-embedded double-bearing structure, and the pulley 233 is inserted on the axis of the fixed bin 1. One end of the pull rope 232 passes through the small hole on the movable slider 22 and is knotted and fixed on the opposite side. The fiber pull rope 232 crosses the pulley 233, and the other end is tied and fixed to the end hole of the telescopic rod of the card-type electric pull rod 231. When the card-type electric pull rod 231 is in motion, the movable slider 22 is pulled by the fiber pull rope 232 to press the handle (specifically, the press key, see for example). Figure 2 The movable slider 22 is shaped to match the push button, specifically an S-shape, which reduces effort required to open the jaws and maintains minimal torque throughout the entire opening process. A return assembly 24 is also included, which is used to return the movable slider 22 to its initial position, releasing the push button on the handle of the clamp-on current sensor 4 within the fixed compartment 1. Specifically, the return assembly 24 includes multiple springs 241, one end of which is connected to one side of the fixed compartment 1 and the other end is connected to the movable slider 22.

[0030] Specifically, the operating rod 3 is a telescopic rod or a cascade of multiple rods (such as link rods). The threaded interface of the cascade link rod is made of a cylindrical rod with two screw holes on the upper end, which is fixedly connected to the bottom surface of the fixed chamber 1 through screws. The lower end is provided with an internal thread, which can be cascaded with a universal link rod epoxy resin rod. Multiple rods can be cascaded according to the required height.

[0031] The remote-controlled automatic opening and closing clamp current sensor device of the present invention realizes the automatic opening and closing of the clamp current sensor 4 by operating the handle mechanism 2; the operation of the clamp current sensor 4 at different heights is realized by the operating rod 3; the present invention does not require high-altitude operation, is portable and efficient, safe and risk-free, universal and detachable, and can be operated from a distance, which can not only avoid safety risks such as falling from heights, electric shock, and bumps, but also save time and effort, greatly improving work efficiency.

[0032] like Figure 4 As shown, it also includes a control circuit board 6, which includes a wireless communication module (such as an RF433 wireless module), a controller (such as a single-chip microcomputer), a resistor R1, a resistor R2, a switch Q1, a switch Q2, a relay REL1, a relay REL2, a diode D1 and a diode D2. The wireless communication module is connected to the input end of the controller; the output port IO1 of the controller is connected to the base of the switch Q1 via the resistor R1, and the collector of the switch Q1 is connected to one end of the coil of the relay REL1; the output port IO2 of the controller is connected to the base of the switch Q2 via the resistor R2, and the collector of the switch Q2 is connected to the base of the switch Q2. The collector is connected to one end of the coil of relay REL2; the other end of the coil of relay REL1 is connected to the other end of the coil of relay REL2, and is connected to the power supply VDD; the anode of diode D1 is connected to one end of the coil of relay REL1, and the cathode of diode D1 is connected to the other end of the coil of relay REL1; the anode of diode D2 is connected to one end of the coil of relay REL2, and the cathode of diode D2 is connected to the other end of the coil of relay REL2; the contact switch of relay REL1 and the contact switch of relay REL2 are both located in the power supply circuit of the driving component 23.

[0033] Specifically, the microcontroller receives the switch signal decoded by the RF433 wireless module to distinguish the remote control command and issue the corresponding operation command. According to the 2-bit binary number 01 for opening the jaws, 10 for closing the jaws, and 11 for pausing, the jaws are controlled to open or close at any opening. The IO port level is controlled to control the Q1 / Q2 transistors, and the relay REL1 or REL2 is turned on and off to control the current flowing through the DC motor ( Figure 4 The current direction of the card type electric push rod 231 is controlled by the DC motor, so that the DC motor inside the card type electric push rod 231 can realize forward and reverse rotation, thereby controlling the telescopic movement of the card type electric push rod. The DC motor circuit is connected in series with a current detection element (such as a Hall current transformer, Figure 4The device (U1 in Figure 1) samples the motor circuit current. When the current clamp fully opens, an abnormally high current flows through the motor circuit due to a blocking condition. The MCU's AD sampling circuit detects a current greater than that during normal operation and deems the clamp to be fully open. It then controls the corresponding relay to shut down the motor, thus achieving the limit function. The Hall effect current transformer is compact and suitable for applications with limited internal space. (Although a travel switch can achieve the same function, the smaller internal space and the different current clamp dimensions will affect its applicability and overall design.)

[0034] The control process is as follows: When both IO ports IO1 and IO2 of the microcontroller are low, both ends of the motor receive positive power, and the motor is turned off. When I01 is 1 and IO2 is 0, the REL1 relay is energized, the lower end of the motor becomes positive and the upper end negative, the motor receives reverse current, the motor rotates in reverse, and the pull rod retracts. When IO1 is 0 and IO2 is 1, the REL2 relay is energized, the upper end of the motor becomes positive and the lower end negative, the motor receives positive current, the motor rotates in the forward direction, and the pull rod extends, thus achieving the extension and retraction of the electric pull rod 231. Limit stops are achieved by changing the magnitude and direction of the current flowing through the Hall effect sensor.

[0035] The control circuit is secured to the front bulkhead via four screws and equipped with a lithium polymer battery 7, secured to the mounting compartment 1. This battery provides power to the control and operating mechanisms. An electrical connector 5, specifically an 8-pin female aviation connector, is located at the bottom of the mounting compartment 1 for connections such as the current clamp output and internal current charging.

[0036] The present invention does not require high-altitude operations and is at an electrically safe distance from the object being measured, so it is safe and risk-free. The above device is portable, fast, efficient, and saves time and effort. In addition, it is universally detachable and has good adaptability, and does not affect the manual opening and closing operations of the current clamp, thus realizing multiple uses of one device.

[0037] As shown in this disclosure and the claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not specifically refer to the singular, but also include the plural. The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0038] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the principles of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A remote control automatic opening and closing clamp current sensor device, characterized in that: The invention comprises a fixed bin (1), an operating handle mechanism (2) and an operating rod (3); the top end of the fixed bin (1) is open and is interference-fitted with the handle of the clamp current sensor (4); one end of the operating rod (3) is connected to the bottom end of the fixed bin (1); the operating handle mechanism (2) comprises a guide assembly (21), a movable slider (22) and a driving member (23); the guide assembly (21) is located inside the fixed bin (1); the movable slider (22) is slidably arranged on the guide assembly (21); the driving member (23) is used to drive the movable slider (22) to slide on the guide assembly (21) to press or release the handle of the clamp current sensor (4) in the fixed bin (1), thereby realizing automatic separation and connection of the clamp current sensor (4); The driving member (23) includes electric pull rods (231) located on both sides of the fixed bin (1), and the telescopic ends of the electric pull rods (231) are connected to the movable slider (22) via pull ropes (232); Pulleys (233) are further provided on both sides of the fixed bin (1), and the pull rope (232) is wound around the pulleys (233); It also includes a return assembly (24) for driving the movable slider (22) back to the initial position to release the handle of the clamp current sensor (4) in the fixed compartment (1); The return assembly (24) includes a plurality of springs (241), one end of each spring (241) is connected to the inner side of the fixed compartment (1), and the other end is connected to the movable slider (22); The shape of the movable slider (22) matches the shape of the handle of the clamp-type current sensor (4); The movable slider (22) is in an S-shape.

2. The remote-controlled automatic opening and closing clamp current sensor device according to claim 1, characterized in that: The operating rod (3) is a telescopic rod or a cascade of multiple rods.

3. The remote-controlled automatic opening and closing clamp current sensor device according to claim 1, characterized in that: It also includes a wireless communication module, a controller, a resistor R1, a resistor R2, a switch Q1, a switch Q2, a relay REL1, a relay REL2, a diode D1 and a diode D2, wherein the wireless communication module is connected to the input end of the controller; the output port IO1 of the controller is connected to the base of the switch Q1 via the resistor R1, and the collector of the switch Q1 is connected to one end of the coil of the relay REL1; the output port IO2 of the controller is connected to the base of the switch Q2 via the resistor R2, and the collector of the switch Q2 is connected to one end of the coil of the relay REL2; The other end of the coil of relay REL1 is connected to the other end of the coil of relay REL2 and is also connected to a power supply VDD; the anode of diode D1 is connected to one end of the coil of relay REL1, and the cathode of diode D1 is connected to the other end of the coil of relay REL1; the anode of diode D2 is connected to one end of the coil of relay REL2, and the cathode of diode D2 is connected to the other end of the coil of relay REL2; the contact switch of relay REL1 and the contact switch of relay REL2 are both located in a power supply circuit of a driving member (23).

4. The remote-controlled automatic opening and closing clamp current sensor device according to claim 3, characterized in that: It also includes a current detection component for detecting the current of the driving component (23), and the current detection component is connected to the controller.

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