An electrical variable measuring device

Abstract

The application provides an electric variable measuring device, which comprises a collecting module, the collecting module comprises a protective shell, the front surface of the protective shell is provided with a power-on mechanism, and the protective shell is provided with a measuring circuit; the power-on mechanism comprises an interface assembly and a power-on assembly; the interface assembly comprises a first groove arranged on the front surface of the protective shell, a sealing column is sealingly connected in the first groove, a power-on interface is arranged on the front surface of the sealing column, and the back surface of the sealing column is provided with a first power-on plane; the power-on assembly comprises an insulating sliding block, the bottom surface of the first groove is provided with a through hole for slidingly connecting the sliding block, the front surface of the sliding block is sealingly provided with a second power-on plane opposite to the first power-on plane in position, and the second power-on plane is electrically connected with the input end of the measuring circuit through a wire. The application can quickly and accurately detect the electric energy of a power supply to be measured.

Description

Technical Field

[0001] This invention relates to the field of electrical variable measurement technology, and more specifically to an electrical variable measurement device. Background Technology

[0002] Electrical quantity measurement is an important part of electrical engineering, mainly involving the measurement of various electrical quantities such as voltage, current, power, and energy. Current is the amount of charge passing through the cross-section of a conductor per unit time. An ammeter is an instrument used to measure current, and its principle is based on the magnetic effect of current. For example, in a magnetoelectric ammeter, when current passes through a coil, the coil experiences an Ampere force in the magnetic field and deflects; the magnitude of the current is indicated by the deflection angle of the pointer.

[0003] Chinese Patent Publication No. CN113514668B discloses a device for measuring electrical variables, including a body and a display screen. A recessed cavity is provided on the top surface of the body, and the display screen is mounted inside the cavity via a rotating shaft. A movable groove is formed through the center of the bottom of the recessed cavity, and a receiving cavity is formed on one side of the movable groove. A corrugated tube extends from the movable groove into the receiving cavity, and a camera is mounted at one end of the corrugated tube. The camera can reciprocate between the movable groove and the receiving cavity as the corrugated tube extends and retracts. The camera's imaging surface faces the bottom of the body, and the top surface of the camera has a chamfered surface. A pressure block is provided on the bottom surface of the display screen. The pressure block is used to rotate with the display screen into the recessed cavity and press the chamfered surface to retract the camera into the receiving cavity. This prior art is convenient for measuring buried electrical equipment, but it cannot further secure the connection points, which can easily lead to incomplete contact.

[0004] Chinese Patent CN116298524B discloses an electrical variable measuring device, including a workbench and a detection plug on it that matches the detection socket on the resistor to be tested. A belt conveyor is provided on one side of the workbench, and a detection disc for rotating the resistor to be tested is provided on the workbench. A cross-shaped partition plate divides the upper space of the detection disc into four functional areas: a loading area, a testing area, a waiting area, and a unloading area. A fixed-rotation component is provided on the workbench to drive the detection disc to rotate horizontally by 90 degrees at a time. A pushing component is provided on one side of the loading area to push the resistor to be tested to the loading area position. A lifting component is provided above the testing area to drive the receiving box to move vertically. The receiving box contains a measuring circuit for measuring the resistance value. This prior art can automatically complete the loading, transfer, and testing process of electronic components, but it cannot adjust the detection method according to the magnitude of the current.

[0005] In the aforementioned prior art, when measuring electrical variables, the connection points are mostly connected by plugging. If the connection points become loose during the detection process, it will affect the detection accuracy and cannot be adjusted in time. The current magnitude varies each time it is detected. When the current amplitude increases sharply in the same time period, it can easily saturate the range and make it impossible to detect in time. Summary of the Invention

[0006] In view of this, the problem to be solved by the present invention is to provide an electrical variable measuring device that can quickly and accurately detect the electrical energy of the power supply under test.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0008] An electrical variable measuring device includes a cabinet with a door, a data acquisition terminal including several data acquisition modules and a display inside the cabinet, a protective shell for each data acquisition module, a power-on mechanism for receiving the current to be measured on the front of the protective shell, and a measuring circuit for passing the current to be measured and acquiring electrical energy data inside the protective shell.

[0009] The power-on mechanism includes an interface component connected to the power supply under test and a power-on component connected to the input terminal of the measurement circuit. The interface component includes a first groove on the front of the protective shell, a sealing post is sealed and snapped into the first groove, a power-on interface for connecting to the power supply under test is installed on the front of the sealing post, and a first power-on plane is provided on the back of the sealing post.

[0010] The energizing component includes an insulated sliding block. The bottom surface of the first groove has a through hole for sliding engagement of the sliding block. The front surface of the sliding block is sealed with a second energizing plane that is opposite to the position of the first energizing plane. The second energizing plane is electrically connected to the input terminal of the measuring circuit through a wire.

[0011] Furthermore, a second groove is provided on both the left and right sides of the first groove. The bottom end of the second groove is provided with an exhaust port communicating with the second groove. A sealing plug is sealed and snapped into the second groove. The front of the sealing plug is fixedly connected to one end of the piston rod. The other end of the piston rod is fixedly connected to a sealing plate that is close to the top surface of the side wall of the second groove. The sealing plate is fixedly connected to the sealing column.

[0012] Furthermore, a first pressure relief check valve is installed on the top sidewall of the second groove.

[0013] Furthermore, the measurement circuit includes a first circuit and a second circuit, and the input terminal of the measurement circuit is connected to the input terminal of the second circuit through a switching assembly;

[0014] The switch assembly includes an insulating block, the rear end of which is fixedly connected to the extended end of an electric actuator. The electric actuator body is fixedly installed inside a protective housing. The left and right side walls of the rear end of the insulating block are provided with a third energized surface for connecting a second circuit. A sliding tube is provided on the outer side of the insulating block, and the front end of the sliding tube is sealed to the back of the sliding block.

[0015] Furthermore, the front end of the second circuit and the input end of the measurement circuit are both provided with conductive components that communicate with the third energized surface. The conductive component includes a fixed conductive member that is fixedly installed inside the protective shell and electrically connected to the front end of the second wire or the input end of the measurement circuit. One end of the fixed conductive member near the third energized surface is connected to a movable conductive member through a conductive spring, and the movable conductive member is in contact with the third energized surface.

[0016] Furthermore, a first cavity is formed between the slide tube, the sliding block, and the insulating block, and a second cavity is formed between the sliding block, the first groove, and the sealing post. A second pressure relief check valve that connects the first cavity and the second cavity is installed on the sliding block.

[0017] Furthermore, the bottom surface of the sealing column has horizontal grooves that allow gas to flow through the left and right sides of the second cavity.

[0018] Furthermore, the side wall of the sliding block is provided with a first stop, and the side wall of the sealing column is provided with a second stop.

[0019] Furthermore, the input terminal of the measurement circuit is fixedly installed inside the protective housing, and the input terminal is electrically connected to the output terminal of the energized component through an elastic wire with a spring structure.

[0020] Furthermore, the sliding block has a groove on its front side with a second energized plane on its bottom surface, and the sealing column has a protrusion on its back side with a first energized plane on its top surface.

[0021] The advantages and positive effects of this invention are:

[0022] This invention enables rapid and stable connection between the power supply under test and the measurement circuit by setting up a power-on mechanism that includes an interface component and a power-on component. By setting up a switching component, the contact stability between the first power-on plane and the second power-on plane is improved, avoiding loosening during detection, which could cause changes in the detected electrical quantity and thus affect the final detection accuracy.

[0023] By setting up a measurement circuit that includes a first circuit and a second circuit, the current is shunted in a dual-path manner, thereby increasing the detected value and avoiding a sharp increase in current. Single-path detection is prone to saturation, which would prevent timely detection. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the protective shell structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the cross-sectional structure of the protective shell of the present invention;

[0028] Figure 4 This is a schematic diagram of the cross-sectional structure of the second groove of the present invention;

[0029] Figure 5 This is a schematic diagram of the test circuit structure of the present invention;

[0030] Figure 6 This is a schematic diagram of the conductive component structure of the present invention;

[0031] Figure 7 This is a schematic diagram of the switching assembly structure of the present invention;

[0032] Figure 8 This is a schematic diagram of the structure on the back of the interface component of the present invention;

[0033] Figure 9 This is a schematic diagram of the overall structure of the first and second grooves of the present invention.

[0034] In the diagram: 1. Cabinet; 2. Acquisition terminal; 4. Acquisition module; 401. Protective shell; 5. Interface assembly; 501. Second groove; 502. Power interface; 503. First pressure relief check valve; 504. Exhaust port; 505. Piston rod; 506. Sealing plate; 507. Sealing column; 6. Test circuit; 601. First circuit; 602. Second circuit; 603. First current sensor; 604. Second current sensor; 605. Third current sensor; 606. Elastic wire; 607. Conductive component; 671. Fixed conductive component; 672. Movable conductive component; 673. Conductive spring; 7. Switch assembly; 701. Slide tube; 702. Insulating block; 703. Third power-conducting surface; 8. Power-conducting assembly; 9. Second pressure relief check valve; 10. Display. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is described as "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is described as "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed terms.

[0038] This invention provides an electrical variable measuring device, such as... Figures 1 to 9 As shown, the device includes a cabinet with a door on the front, and a data acquisition terminal inside the cabinet. The data acquisition terminal includes several data acquisition modules and a display. The output terminals of the data acquisition modules are all interconnected with the display. When the data acquisition terminal is in operation, the data acquisition modules receive the electrical energy to be measured and acquire the electrical energy data. The display receives, processes, and displays the electrical energy data, facilitating the recording of measurement results by the staff.

[0039] One embodiment of this application is as follows: the upper end of the acquisition terminal is provided with a display screen, the lower end of the acquisition terminal is provided with several horizontally arranged acquisition modules, and the cabinet door is provided with an observation window opposite to the position of the display screen of the display screen.

[0040] The acquisition module includes a protective housing. The front of the protective housing is provided with a power-on mechanism for receiving the current to be measured, and the inside of the protective housing is provided with a measurement circuit for passing the current to be measured and acquiring electrical energy data.

[0041] The power-on mechanism includes an interface component that communicates with the power supply under test and a power-on component that communicates with the input terminal of the measurement circuit. The interface component includes an insulated sealing post and a first groove on the front side of the protective housing, with the sealing post sealingly engaging with the opening end of the first groove. A power-on interface for connecting to the power supply under test is mounted on the front side of the sealing post, and a first power-on plane is provided on the back side of the sealing post, with the power-on interface electrically connected to the first power-on plane. Specifically, the power-on interface is used to communicate with the power supply under test.

[0042] The energizing assembly includes an insulated sliding block. A through hole is formed on the bottom surface of the first groove, and the sliding block is slidably engaged within the through hole. A second energizing plane, opposite to the first energizing plane, is sealed on the front side of the sliding block. The second energizing plane is electrically connected to the input terminal of a measuring circuit inside the protective housing via an energizing wire. In one embodiment of this application, an energizing wire is provided inside the sliding block. The front end of the energizing wire communicates with the first energizing plane, and the rear end of the energizing wire extends from the back of the sliding block and is electrically connected to the input terminal of the measuring circuit.

[0043] One embodiment of this application is as follows: a sliding groove is formed on the front side of the sliding block, a second energized plane is disposed on the bottom surface of the sliding groove, a protrusion matching the sliding groove is provided on the back side of the sealing column, and a first energized plane is disposed on the top surface of the protrusion, so that the first energized plane and the second energized plane can make accurate contact and improve the efficiency of communication.

[0044] To improve the stability of the sealing column installation, a second groove is provided on both the left and right sides of the first groove. The bottom of the second groove is provided with an exhaust port communicating with the second groove. A sealing plug is sealed and snapped into the middle section of the second groove. The front of the sealing plug is fixedly connected to one end of the piston rod, and the other end of the piston rod is fixedly connected to the sealing plate that is close to the top surface of the side wall of the second groove. The sealing plate is fixedly connected to the side wall of the sealing column.

[0045] When installing the sealing column, align the sealing plug on the piston rod with the corresponding second groove, press the sealing plug into the second groove, and the excess gas in the second groove will be discharged from the exhaust port; continue to press the sealing plates on the left and right sides of the sealing column, and during the process of pressing the piston rod into the corresponding second groove, the sealing column can be smoothly pressed into the first groove, improving the sealing efficiency between the first groove and the sealing column.

[0046] After the sealing column is installed, to improve its anti-interference capability, a first pressure relief check valve is installed on the side wall of the second groove away from the first groove. The first pressure relief check valve is used to connect with an air pump to introduce high-pressure gas into the top area of ​​the sealing tube to fix the sealing column. An exhaust port connected to the first groove is opened at the bottom of the second groove. When the piston rod is installed, the exhaust port is used to discharge excess gas in the bottom area of ​​the second groove. When the sliding block presses against the back of the sealing column, the sealing column is not easy to loosen.

[0047] The installation process of the interface component is as follows: Press the two piston rods into the corresponding second grooves at the same time. Excess gas in the second grooves is discharged through the exhaust port until the sealing plate contacts the top surface of the side wall of the second groove. The first pressure relief check valve is connected to the air pump. The sealing plate is manually pressed, and then gas is introduced into the front end of the piston tube through the air pump to apply gas pressure to the front of the sealing plug, so that the first sealing plate is tightly attached to the opening end of the piston tube, thus completing the installation and fixation of the conductive mechanism.

[0048] The protective casing contains a measurement circuit for transmitting the electrical energy to be measured and collecting electrical energy data. The measurement circuit includes an input terminal for receiving the electrical energy to be measured and an output terminal for outputting the electrical energy to be measured. The output terminal of the energized component is electrically connected to the input terminal of the measurement circuit, and the output terminal of the measurement circuit is grounded.

[0049] A first circuit and a second circuit are provided between the input and output terminals. The first circuit includes a first wire for carrying the current to be measured, and a first current sensor is provided on the first wire. The second circuit includes a second wire for carrying the current to be measured, and a second current sensor is provided on the second wire. A third current sensor is provided at the input terminal of the measurement circuit. The output terminals of the first current sensor, the second current sensor, and the third current sensor are all interconnected with the display.

[0050] The front end of the second conductor is connected to the input terminal of the measuring circuit via a switching assembly. The switching assembly controls whether the current to be measured flows through the second conductor. The switching assembly includes an insulating block, the rear end of which is fixedly connected to the extended end of the electric actuator. The electric actuator body is fixedly installed inside the protective housing. A third energizing surface is provided at the rear end of both the left and right side walls of the insulating block. A sliding tube is provided on the outer sealing sleeve of the insulating block, and the front end of the sliding tube is sealed to the back of the sliding block.

[0051] A first cavity is formed between the slide tube, the sliding block, and the insulating block; a second cavity is formed between the sliding block, the first groove, and the sealing post. A second pressure relief check valve is installed on the sliding block. When the second pressure relief check valve is not releasing pressure, the first cavity and the second cavity are not connected, and the sliding block can be pushed to press against the sealing through hole by an electric actuator; when the second pressure relief check valve releases pressure, the first cavity and the second cavity are connected, and the high-pressure gas in the first cavity is simultaneously discharged into the bottom end of the second cavity and the second groove.

[0052] One embodiment of this application is: the bottom surface of the sealing column has a horizontal groove for allowing gas to flow through the left and right sides of the second cavity.

[0053] To improve the sealing efficiency of the second cavity, the sliding block has a first stop on its side wall, which is used to press against the back of the sealing through hole; the sealing column has a second stop on its side wall, which is used to press against the top surface of the side wall of the sealing first groove. In one embodiment of this application, the input terminal of the measuring circuit is fixedly installed inside the protective housing, and the input terminal is electrically connected to the output terminal of the energized component through a spring-structured elastic wire, ensuring that the first stop is always in contact with the back of the through hole.

[0054] The first energizing component is provided at the front end of the second conductor, and the second energizing component is provided at the input end of the measuring circuit. The first and second energizing components have the same structure. The first energizing component includes a movable conductive element, a fixed conductive element, and a conductive spring. The fixed conductive element is fixedly installed inside the protective shell and electrically connected to the front end of the second conductor. The end of the fixed conductive element away from the second conductor is connected to the movable conductive element through the conductive spring. The movable conductive element is in contact with the third energizing surface of the left side wall of the insulating block.

[0055] The working process of the switch assembly is as follows: While gas at a set pressure is introduced into the first cavity via an air pump, the electric actuator retracts. When the electric actuator extends, the front section of the insulating block presses into the slide tube, compressing the gas in the first cavity for the first time and causing the slide block to approach the sealing post. As the electric actuator continues to extend, the middle section of the insulating block presses into the slide tube, and the movable conductive element on the second conductor contacts the third energized surface, energizing the second conductor.

[0056] The electric actuator continues to extend, pressing the rear end of the insulating block into the slide tube, and the first side wall presses against the back of the sealing through hole; the electric actuator continues to extend, causing the insulating block to move inside the slide tube, and the second pressure relief check valve releases pressure, forcing the high-pressure gas in the first cavity into the second cavity.

[0057] The operating process of the measuring circuit is as follows: It receives data from the third current sensor to determine the current magnitude. When the current is small, the electric push rod does not move, and only the first circuit measures the current data. When the current is unstable, the electric push rod extends to bring the sliding block closer to the sealing post until the current stabilizes. When the current is large, the electric push rod continues to extend to energize the second wire, and the first and second circuits jointly measure the current data. When the current exceeds the limit value, the electric push rod continues to extend to allow the high-pressure gas in the first cavity to be discharged to the second cavity through the second pressure relief check valve. The high-pressure gas in the second cavity enters the bottom of the second groove through the exhaust port, increasing the gas pressure at the top of the second groove. The second pressure relief check valve then releases pressure, pushing the sealing plug out of the second groove and disconnecting the connection between the first and second energized surfaces.

[0058] The specific implementation process and beneficial effects of this invention are as follows:

[0059] Connection of the power supply under test: Connect the power supply under test to the power interface, press the sealing plates on both sides of the sealing column to make them fit tightly against the top surface of the side wall of the second groove, and then introduce gas of preset pressure into the upper end of the second groove through the first pressure relief check valve, so that the first power-conducting surface on the back of the sealing column contacts the second power-conducting surface on the front of the sliding block.

[0060] Sampling the current to be measured: The power supply outputs the current to be measured, which flows through the first circuit. The current data collected by the third current sensor determines the current magnitude and stability. When the current is unstable, the switching assembly moves the sliding block closer to and presses against the back of the sealing block, improving the stability of the connection. When the current is large, the switching assembly connects the second circuit. When the current exceeds the extreme value, the switching assembly introduces high-pressure gas from the first chamber into the second chamber, thereby pushing the sealing column away from the sliding block to disconnect the power supply.

[0061] The embodiments of the present invention have been described in detail above, but the content described is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of this patent.

Claims

1. An electrical variable measuring device, characterized in that, The device includes a cabinet with a door, and inside the cabinet is a data acquisition terminal including several data acquisition modules and a display. Each data acquisition module includes a protective shell, and the front of the protective shell has a power-on mechanism for receiving the current to be measured. Inside the protective shell is a measurement circuit for passing the current to be measured and acquiring electrical energy data. The power-on mechanism includes an interface component connected to the power supply under test and a power-on component connected to the input terminal of the measurement circuit. The interface component includes a first groove on the front of the protective shell, a sealing post is sealed and snapped into the first groove, a power-on interface for connecting to the power supply under test is installed on the front of the sealing post, and a first power-on plane is provided on the back of the sealing post. The energizing component includes an insulated sliding block. The bottom surface of the first groove has a through hole for sliding engagement of the sliding block. The front surface of the sliding block is sealed with a second energizing plane that is opposite to the position of the first energizing plane. The second energizing plane is electrically connected to the input terminal of the measuring circuit through a wire. The first groove has a second groove on both the left and right sides. The bottom of the second groove has an exhaust port communicating with the second groove. A sealing plug is sealed and snapped into the second groove. The front of the sealing plug is fixedly connected to one end of the piston rod. The other end of the piston rod is fixedly connected to a sealing plate that is close to the top surface of the side wall of the second groove. The sealing plate is fixedly connected to the sealing column. The measuring circuit includes a second circuit. Both the front end of the second circuit and the input end of the measuring circuit are provided with a power-conducting component that communicates with the third power-conducting surface. The power-conducting component includes a fixed conductive member that is fixedly installed inside the protective shell and electrically connected to the front end of the second wire or the input end of the measuring circuit. One end of the fixed conductive member near the third power-conducting surface is connected to a movable conductive member through a conductive spring. The movable conductive member is in contact with the third power-conducting surface.

2. The electrical variable measuring device according to claim 1, characterized in that, A first pressure relief check valve is installed on the top sidewall of the second groove.

3. The electrical variable measuring device according to claim 1, characterized in that, The measurement circuit includes a first circuit, and the input terminal of the measurement circuit is connected to the input terminal of a second circuit through a switching assembly; The switch assembly includes an insulating block, the rear end of which is fixedly connected to the extended end of an electric actuator. The electric actuator body is fixedly installed inside a protective housing. The left and right side walls of the rear end of the insulating block are provided with a third energized surface for connecting a second circuit. A sliding tube is provided on the outer side of the insulating block, and the front end of the sliding tube is sealed to the back of the sliding block.

4. The electrical variable measuring device according to claim 3, characterized in that, A first cavity is formed between the slide tube, the sliding block, and the insulating block, and a second cavity is formed between the sliding block, the first groove, and the sealing post. A second pressure relief check valve that connects the first cavity and the second cavity is installed on the sliding block.

5. An electrical variable measuring device according to claim 4, characterized in that, The bottom surface of the sealing column is horizontally provided with a through groove to allow gas to flow through the left and right sides of the second cavity.

6. The electrical variable measuring device according to claim 4, characterized in that, The sliding block has a first stop on its side wall, and the sealing column has a second stop on its side wall.

7. An electrical variable measuring device according to claim 1, characterized in that, The input terminal of the measurement circuit is fixedly installed inside the protective housing, and the input terminal is electrically connected to the output terminal of the energized component through an elastic wire with a spring structure.

8. An electrical variable measuring device according to claim 1, characterized in that, The sliding block has a groove on its front side with a second energized plane on its bottom surface, and the sealing column has a protrusion on its back side with a first energized plane on its top surface.

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