A variable-frequency series-resonant withstand voltage test equipment

Abstract

The present invention discloses a variable-frequency series-resonant withstand voltage test equipment, and the present invention relates to the technical field of variable-frequency series-resonant withstand voltage test equipment. The present invention includes a winding assembly, a connecting wire is wound on the surface of the winding assembly, a connecting component is fixedly connected to the side of the connecting wire away from the detection component, a grounding component is arranged on the side of the bottom plate away from the detection component, the outer side surface of the grounding component is slidably connected to the inner side surface of the bottom plate, the connecting wire is slidably connected to the box body, and cooperating with the connecting component which is also slidably connected, the distance between the two connecting wires can be adjusted to adapt to different test objects. When the connecting component accidentally falls off from the test object, the winding assembly is started to insulate the connecting wire to avoid danger, and the movement of the connecting component and the connecting wire can be visually presented and can be seen by the experimenter with the naked eye, so that the danger can be quickly avoided, the power supply can be cut off to avoid danger.

Description

Technical Field

[0001] The present invention relates to the technical field of variable-frequency series-resonant withstand voltage test equipment, and particularly relates to a variable-frequency series-resonant withstand voltage test equipment. Background Art

[0002] The variable-frequency series-resonant withstand voltage test equipment is a professional equipment used for the withstand voltage test of electrical equipment. It uses a variable-frequency power supply to adjust the output frequency, so that the reactor and the capacitance of the test object form a series-resonant state. Under the resonant state, the current in the test circuit reaches the maximum value, and the voltage on the test object also rises correspondingly to the required withstand voltage value. By monitoring the insulation performance of the test object under high voltage, it is judged whether it can work safely and reliably under normal operating conditions. This equipment mainly consists of a variable-frequency power supply, a reactor, a voltage divider, a control box, etc., and has the characteristics and advantages of high output voltage, small size, light weight, wide application range, complete protection functions, and simple operation. It is widely used in power systems, industrial and mining enterprises, rail transit and other fields for commissioning tests and preventive tests on power equipment such as transformers, cables, switch cabinets, and insulators.

[0003] During the experiment, the variable-frequency power supply, the reactor, the voltage divider, the control box, etc. all need to be connected to the grounding system to avoid danger caused by electric leakage. The connection between the test object and the equipment is usually completed manually, which is prone to omissions, resulting in the test object falling off. Moreover, whether the test object and the equipment are disconnected and whether the equipment is fully grounded cannot be visually shown and can only be detected by instruments, which is prone to danger. Therefore, we propose a variable-frequency series-resonant withstand voltage test equipment. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a variable-frequency series-resonant withstand voltage test equipment, including:

[0005] A bottom plate, a support leg is fixedly connected to the side of the bottom plate, and a detection component is fixedly connected to the top of the bottom plate through bolts. The detection component is used to detect parameters of the test object, such as voltage level, capacitance value, etc., so as to select a suitable equipment configuration.

[0006] A connection mechanism, which has a fixing structure and is used to connect the test object.

[0007] Wherein, the connection mechanism includes:

[0008] A box body, which is made of insulating material and is used for the protection of the test object. The box body is fixedly connected to the top of the bottom plate away from the detection component, and a connection wire is slidably connected inside the box body.

[0009] The winding component is fixedly connected inside the box body, and the connecting wire is wound around the surface of the winding component. A connecting component is fixedly connected to the side of the connecting wire away from the detection component, and the connecting component is slidably connected to the outer side surface of the box body;

[0010] The grounding component has an insulating structure and is used to connect to the grounding system. The grounding component is arranged on the side of the bottom plate away from the detection component, and the grounding component penetrates through the bottom plate and extends into the detection component. The outer side surface of the grounding component is slidably connected to the inner side surface of the bottom plate. Before the experiment, the detection component and the test sample to be detected are connected to the grounding system through the grounding component to avoid the risk of electric leakage during detection. Subsequently, the test sample to be detected is connected through the connecting component by a wire, the connecting wire is connected to the detection component, and then the detection component is connected to the AC power supply. The detection component is powered on and starts. The current passes through the connecting wire and the test sample in sequence, and finally the current accesses the grounding system through the grounding component. The detection component obtains the detection data to complete the experiment. The connecting wire is slidably connected to the box body, and together with the connecting component which is also slidably connected, it can adjust the distance between the two connecting wires to adapt to different test samples. When the connecting component accidentally detaches from the test sample, the winding component starts to drive the connecting wire to wind, and the connecting wire returns to the inside of the box body. The connecting wire is insulated to avoid danger, and the movement of the connecting component and the connecting wire can be visually shown and is visible to the experimenter, enabling them to quickly move away from danger, cut off the power supply, and avoid danger.

[0011] Further, a control panel is fixedly connected to the side of the detection component away from the box body. An access terminal is also fixedly connected to the surface of the detection component, and the access terminal is arranged on the outer surface of the detection component perpendicular to the box body. The control panel is electrically connected to the detection component and is used to adjust the parameters of the detection component to obtain different detection data, set a control group, and obtain more accurate experimental results. The experimental data is finally displayed on the display screen of the control panel. The access terminal is used to connect to the AC power supply.

[0012] Further, the grounding component includes insulating cylinders. A plurality of insulating cylinders are arranged at the bottom of the bottom plate. The end surface of the insulating cylinder is fixedly connected to the side of the bottom plate away from the box body. A sector plate is fixedly connected to the side of the insulating cylinder away from the bottom plate, and a plurality of sector plates are evenly distributed along the circumference of the insulating cylinder. The sector plate is made of flexible insulating material. When the wire of the grounding system is inserted into the insulating cylinder, several sector plates deform to wrap the wire, and together with the insulating cylinder, it insulates the wire connection to avoid looseness and electric leakage during grounding and further avoid danger.

[0013] Further, a spring rod is fixedly connected to one side of the bottom plate close to the insulating cylinder. The end of the spring rod away from the bottom plate penetrates through the insulating cylinder and extends into the interior of the sector plate. The surface of the spring rod is fixedly connected to the inner side surface of the insulating cylinder, and the surface of the spring rod is fixedly connected to the inner side surface of the sector plate. The spring rod is provided to support the sector plate and hold it up. When the grounding system is not connected, the insulating cylinder can be closed to protect the internal structure of the insulating cylinder. The spring rod and the sector plate jointly provide elastic force, which can better wrap the wire of the grounding system, ensure the insulation effect when the grounding system is connected, and avoid electric leakage when the grounding system and the grounding component become loose.

[0014] Further, a grounding terminal is arranged inside the insulating cylinder. A limiting cylinder is fixedly connected to the inner side surface of the grounding terminal. The end of the limiting cylinder away from the grounding terminal extends into the interior of the detection component. The limiting cylinder and the bottom plate are axially limited and slide relative to each other. The surface of the limiting cylinder located inside the detection component is slidably connected to the inner side surface of the detection component. A grounding wire is slidably connected to the inner side surface of the limiting cylinder. One end of the grounding wire close to the grounding terminal is fixedly connected to an electromagnetic plate. The surface of the electromagnetic plate is slidably connected to the inner side surface of the grounding terminal. A threaded groove is formed on the inner side surface of the grounding terminal away from the electromagnetic plate. The end of the grounding wire away from the grounding terminal is connected to the detection component. The wire of the grounding system is inserted into the interior of the insulating cylinder, enters the interior of the grounding terminal, and finally contacts the electromagnetic plate. The electromagnetic plate is connected to the grounding system to form a closed loop. The electromagnetic plate generates magnetic force to adsorb the wire of the grounding system, completing the connection with the grounding system. Under the combined action of the electromagnetic force and the wrapping force of the sector plate, once the grounding wire is connected through the electromagnetic plate, it is difficult to become loose naturally, which can better ensure safety. The sector plate enters the interior of the grounding terminal and contacts the threaded groove of the grounding terminal, increasing the friction with the grounding terminal, ensuring that the sector plate can be stuck between the inner side surface of the grounding terminal and the wire of the grounding system, further achieving better wrapping and avoiding loosening.

[0015] Further, a temperature detector is fixedly connected to one side of each of the several sector plates located inside the insulating cylinder. The temperature detectors are evenly distributed along the circumference of the grounding terminal. When the electromagnetic plate and the wire of the grounding system become loose, the electromagnetic plate cannot form a closed loop, the current cannot pass through, the heat generation decreases, and the temperature detector feeds back the degree of heat reduction to the control panel, enabling the operator to quickly notice and avoid danger caused by charge accumulation. The temperature detector is arranged outside the grounding terminal, closer to the electromagnetic plate. The resistance value of the electromagnetic plate is usually greater than that of the wire, and the temperature difference before and after the loop is disconnected is relatively large, which can be better detected by the temperature detector.

[0016] Further, an insulating spring is fixedly connected to the side of the grounding terminal away from the sector plate. The end of the insulating spring away from the grounding terminal is fixedly connected to the bottom plate, and the insulating spring is sleeved outside the limiting cylinder. The wire of the grounding system is inserted into the grounding terminal and contacts the electromagnetic plate. The electromagnetic plate moves, driving the grounding terminal and the grounding wire to move. The insulating spring is compressed, which can prevent the wire from hitting the electromagnetic plate and avoid damage and deformation of both. At the same time, under the elastic force of the insulating spring restoring its deformation, the grounding terminal presses the sector plate more tightly, and can better seal the wire of the grounding system through the sector plate, obtaining a better insulation effect.

[0017] Further, the winding assembly includes a sliding rod. The two ends of the sliding rod are respectively fixedly connected to the two parallel inner sides of the box body. Winding drums are symmetrically arranged outside the sliding rod. The inner side of the winding drum is slidably connected to the surface of the sliding rod. Winding springs are fixedly connected to the sides of the two winding drums away from each other. The ends of the two winding springs away from each other are fixedly connected to the inner side of the box body. And the connecting wire is wound on the surface of the winding drum. Sliding grooves are formed in the sides of the box body near both ends of the connecting wire. The inner side of the sliding groove is slidably connected to the surface of the connecting wire. The connecting wire is tightened, driving the winding drum to rotate, driving the winding spring to twist, and at the same time the winding spring is stretched. The two winding drums slide away from each other on the surface of the sliding rod. The connecting wire slides inside the sliding groove. When winding, the winding spring provides the elastic force for the movement and rotation of the winding drum at the same time, so that the winding drum rotates while approaching each other, and can quickly wind the connecting wire into the box body, so as to achieve rapid insulation when falling off and rapid winding during idle time.

[0018] Further, the connecting assembly includes connecting terminals. An electromagnetic ring is fixedly connected to the side of the connecting terminal close to the box body. The inner side of the electromagnetic ring is fixedly connected to the surface of the connecting wire away from the detection component. And the connecting terminals, the electromagnetic ring and the surface of the box body are slidably connected. Metal blocks are fixedly connected to the sides of the two connecting terminals close to each other. And the metal block is made of a magnetically conductive material. One end of the test product is connected to the grounding system through the grounding component. The wire of the test product is inserted into the connecting terminal. A closed loop is formed among the wire of the test product, the electromagnetic ring, the connecting wire and the ground. The electromagnetic ring works, and the two electromagnetic rings generate an attractive magnetic force. The metal block is magnetically conductive, so that the two connecting terminals adsorb each other, preventing the connecting wire from being wound. At this time, the winding spring is in a stretched and twisted state, and the connecting wire is in a unwound state. When the connection between the connecting terminal and the wire of the test product becomes loose, the closed loop of one or two electromagnetic rings disappears, and the adsorption force disappears. Under the elastic force of the winding spring, the connecting wire is quickly wound and enters the box body, avoiding contact with the ground, thereby avoiding electric shock to the experimenter. At the same time, the movement of the connecting terminal is obvious and can be quickly detected by the experimenter. Compared with instrument detection, although the degree of leakage cannot be determined, it can quickly warn the experimenter.

[0019] Furthermore, protective sleeves are provided outside the connection terminals. One side of the protective sleeve close to the box body is in limit sliding connection with the chute. The protective sleeve is made of insulating elastic material. Bent plates are symmetrically arranged on one side of the protective sleeve close to the connection terminal. One ends of the bent plates away from each other are fixedly connected to the inner side surface of the protective sleeve. One end of the bent plate away from the protective sleeve bends and extends into the protective sleeve, and the bent plate is made of insulating elastic material. Before the experiment, the connection terminals and the metal blocks are both protected inside the protective sleeve. When the protective sleeve is squeezed, the metal block squeezes the bent plate, and the bent plate deforms. The connection terminal and the metal block are exposed. Then, the wire of the test product is connected to complete the adsorption and fixation. When the adsorption disappears, the connection terminals move away from each other. The connection terminal contacts the bent plate, and the bent plate deforms. The connection terminal and the metal block quickly return to the inside of the protective sleeve, forming insulation protection again.

[0020] The beneficial effects of the present invention are as follows:

[0021] By providing a connection mechanism in the present invention, the connection wire is in sliding connection with the box body, and cooperating with the connection component which is also in sliding connection, the distance between the two connection wires can be adjusted to adapt to different test products. When the connection component accidentally falls off from the test product, the winding component is activated to insulate the connection wire to avoid danger. Moreover, the movement of the connection component and the connection wire can be visually shown and can be seen by the experimenter with the naked eye, so that they can quickly move away from danger, cut off the power supply, and avoid danger. The control panel is electrically connected to the detection component and is used to adjust the parameters of the detection component to obtain different detection data. A control group is set to obtain more accurate experimental results.

[0022] By providing a grounding component in the present invention, the sector plate deforms to wrap the wire, and cooperating with the insulating cylinder to insulate the connection part of the wire, avoiding electric leakage caused by loosening during grounding and further avoiding danger. The elastic rod supports the sector plate and holds it up. When the grounding system is not connected, it can close the insulating cylinder to protect the internal structure of the insulating cylinder. The elastic rod and the sector plate jointly provide elastic force, which can better wrap the wire of the grounding system to ensure the insulation effect when connecting the grounding system and avoid electric leakage caused by loosening between the grounding system and the grounding component. Moreover, under the combined action of the electromagnetic force and the wrapping force of the sector plate, once the grounding wire is connected through the electromagnetic plate, it is difficult to generate natural loosening, which can better ensure safety. The sector plate enters the grounding terminal, and the sector plate contacts the thread groove of the grounding terminal, increasing the friction with the grounding terminal to ensure that the sector plate can be stuck between the inner side surface of the grounding terminal and the wire of the grounding system, further achieving better wrapping and avoiding loosening.

[0023] In the present invention, by providing a temperature detector, when the electromagnetic plate becomes loose from the wire of the grounding system, the electromagnetic plate cannot form a closed loop, the current cannot pass through, the heat generation decreases, and the temperature detector feeds back the degree of heat reduction to the control panel, enabling the operator to quickly detect it and avoid the danger caused by charge accumulation. The temperature detector is arranged outside the grounding terminal, closer to the electromagnetic plate. The resistance value of the electromagnetic plate is usually greater than that of the wire, and the temperature difference before and after the loop is disconnected is relatively large, which can be better detected by the temperature detector.

[0024] In the present invention, by providing a winding assembly, during winding, the winding spring provides elastic forces for both moving and rotating the winding drum simultaneously, enabling the winding drum to rotate while approaching each other, quickly winding the connecting wire into the interior of the box body, thereby achieving rapid insulation during detachment and rapid winding during idle time.

[0025] In the present invention, by providing electromagnetic rings, when the electromagnetic rings work, the two electromagnetic rings generate attractive magnetic forces. At this time, the winding spring is in a stretched and twisted state, and the connecting wire is in an unwinding state. When the wire between the connecting terminal and the test object becomes loose, the closed loop of one or both electromagnetic rings disappears, and the adsorption force disappears. Under the elastic force of the winding spring, the connecting wire quickly winds up and enters the interior of the box body, avoiding contact with the ground, thereby preventing the experimenter from getting an electric shock. At the same time, the movement of the connecting terminal is obvious and can be quickly detected by the experimenter. Compared with instrument detection, although the degree of leakage cannot be determined, it can quickly warn the experimenter. When the adsorption disappears, the connecting terminals move away from each other, the connecting terminals contact the bending plate, the bending plate deforms, and the connecting terminals and the metal block quickly return to the interior of the protective sleeve, forming insulation protection again. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the variable-frequency series resonance withstand voltage test equipment of the present invention;

[0027] Figure 2 is a schematic diagram of the structure of the connecting mechanism of the present invention;

[0028] Figure 3 is a schematic diagram of the internal structure of the box body of the present invention;

[0029] Figure 4 is a schematic diagram of the structure of the grounding assembly of the present invention;

[0030] Figure 5 is a schematic cross-sectional structure diagram of the grounding assembly of the present invention;

[0031] Figure 6 is a schematic cross-sectional structure diagram of the grounding terminal of the present invention;

[0032] Figure 7 is a schematic diagram of the structure of the winding assembly of the present invention;

[0033] Figure 8Schematic diagram of the winding drum structure of the present invention;

[0034] Figure 9 Schematic diagram of the connection component structure of the present invention.

[0035] In the figure: 1, bottom plate; 2, support leg; 3, detection component; 4, connection mechanism; 41, box body; 42, grounding component; 421, insulating cylinder; 422, sector plate; 423, limiting cylinder; 424, grounding wire; 425, elastic rod; 426, electromagnetic plate; 427, grounding terminal; 428, temperature detector; 429, insulating spring; 43, winding component; 431, sliding rod; 432, winding drum; 433, winding spring; 44, connection component; 441, connection terminal; 442, electromagnetic ring; 443, metal block; 444, protective sleeve; 445, bent plate; 45, sliding groove; 46, connection wire; 5, control panel; 6, access terminal. Specific embodiments

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the present invention to the disclosed form. Many modifications and variations will be obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and enable those of ordinary skill in the art to understand the present invention and thus design various embodiments with various modifications suitable for specific purposes.

[0037] Embodiment 1, please refer to Figures 1-6 , the present invention is a variable-frequency series resonance withstand voltage test device, including:

[0038] Bottom plate 1, the side of the bottom plate 1 is fixedly connected with a support leg 2, and the top of the bottom plate 1 is fixedly connected with a detection component 3 through bolts. The detection component 3 is used to detect the parameters of the test object, such as voltage level, capacitance value, etc., so as to select a suitable equipment configuration;

[0039] Connection mechanism 4, the connection mechanism 4 has a fixed structure and is used to connect the test object;

[0040] Among them, the connection mechanism 4 includes:

[0041] Box body 41, the box body 41 is made of insulating material and is used for the protection of the test object. The box body 41 is fixedly connected to the top of the bottom plate 1 away from the detection component 3, and a connection wire 46 is slidably connected inside the box body 41;

[0042] The winding component 43 is fixedly connected inside the box body 41, and the connecting wire 46 is wound around the surface of the winding component 43. A connecting component 44 is fixedly connected to the side of the connecting wire 46 away from the detection component 3, and the connecting component 44 is slidably connected to the outer side surface of the box body 41;

[0043] The grounding component 42 has an insulating structure and is used to connect to the grounding system. The grounding component 42 is arranged on the side of the bottom plate 1 away from the detection component 3, and the grounding component 42 penetrates through the bottom plate 1 and extends into the detection component 3. The outer side surface of the grounding component 42 is slidably connected to the inner side surface of the bottom plate 1. Before the experiment, the detection component 3 and the test product to be detected are connected to the grounding system through the grounding component 42 to avoid the risk of electric leakage during detection. Subsequently, the test product to be detected is connected through the connecting component 44 by a wire, the connecting wire 46 is connected to the detection component 3, and then the detection component 3 is connected to the AC power supply. The detection component 3 is powered on and starts. The current passes through the connecting wire 46 and the test product in sequence, and finally the current is connected to the grounding system through the grounding component 42. The detection component 3 obtains detection data to complete the experiment. The connecting wire 46 is slidably connected to the box body 41. Cooperating with the connecting component 44 which is also slidably connected, the distance between the two connecting wires 46 can be adjusted to adapt to different test products. When the connecting component 44 accidentally falls off from the test product, the winding component 43 starts to drive the connecting wire 46 to wind, and the connecting wire 46 returns to the inside of the box body 41 to insulate the connecting wire 46 to avoid danger. Moreover, the movement of the connecting component 44 and the connecting wire 46 can be visually shown and can be seen by the experimenter with the naked eye, so that they can quickly move away from danger, cut off the power supply, and avoid danger.

[0044] A control panel 5 is fixedly connected to the side of the detection component 3 away from the box body 41. An access terminal 6 is also fixedly connected to the surface of the detection component 3, and the access terminal 6 is arranged on the outer surface of the detection component 3 perpendicular to the box body 41. The control panel 5 is electrically connected to the detection component 3 and is used to adjust the parameters of the detection component 3 to obtain different detection data, set a control group, and obtain more accurate experimental results. The experimental data is finally displayed on the display screen of the control panel 5. The access terminal 6 is used to connect to the AC power supply.

[0045] The grounding component 42 includes an insulating cylinder 421. A plurality of insulating cylinders 421 are arranged at the bottom of the bottom plate 1. The end surface of the insulating cylinder 421 is fixedly connected to the side of the bottom plate 1 away from the box body 41. A sector plate 422 is fixedly connected to the side of the insulating cylinder 421 away from the bottom plate 1, and a plurality of sector plates 422 are evenly distributed along the circumference of the insulating cylinder 421. The sector plate 422 is made of flexible insulating material. When the wire of the grounding system is inserted into the insulating cylinder 421, several sector plates 422 are deformed to wrap the wire, and cooperate with the insulating cylinder 421 to insulate the wire connection part to avoid looseness and electric leakage during grounding and further avoid danger.

[0046] On one side of the bottom plate 1 close to the insulating cylinder 421, there is a spring rod 425 fixedly connected. One end of the spring rod 425 away from the bottom plate 1 penetrates through the insulating cylinder 421 and extends into the interior of the sector plate 422. And the surface of the spring rod 425 is fixedly connected to the inner side surface of the insulating cylinder 421, and the surface of the spring rod 425 is fixedly connected to the inner side surface of the sector plate 422. The spring rod 425 is provided to support the sector plate 422 and hold it up. When the grounding system is not connected, it can close the insulating cylinder 421 and protect the internal structure of the insulating cylinder 421. The spring rod 425 and the sector plate 422 jointly provide elastic force, which can better wrap the wire of the grounding system, ensure the insulation effect when connecting the grounding system, and avoid electric leakage when the grounding system and the grounding component 42 become loose.

[0047] Inside the insulating cylinder 421, there is a grounding terminal 427. On the inner side surface of the grounding terminal 427, there is a limiting cylinder 423 fixedly connected. One end of the limiting cylinder 423 away from the grounding terminal 427 extends into the detection component 3. And the limiting cylinder 423 and the bottom plate 1 are axially limited and slide relative to each other. The surface of the limiting cylinder 423 located inside the detection component 3 is slidably connected to the inner side surface of the detection component 3. Inside the limiting cylinder 423, there is a grounding wire 424 slidably connected. One end of the grounding wire 424 close to the grounding terminal 427 is fixedly connected to an electromagnetic plate 426. The surface of the electromagnetic plate 426 is slidably connected to the inner side surface of the grounding terminal 427. On the inner side surface of the grounding terminal 427 away from the electromagnetic plate 426, there is a threaded groove. One end of the grounding wire 424 away from the grounding terminal 427 is connected to the detection component 3. The wire of the grounding system is inserted into the insulating cylinder 421. The wire enters the grounding terminal 427 and finally contacts the electromagnetic plate 426. The electromagnetic plate 426 is connected to the grounding system to form a closed loop. The electromagnetic plate 426 generates magnetic force to adsorb the wire of the grounding system, completing the connection with the grounding system. And under the combined action of the electromagnetic force and the wrapping force of the sector plate 422, once the grounding wire 424 is connected through the electromagnetic plate 426, it is difficult to become naturally loose, which can better ensure safety. The sector plate 422 enters the grounding terminal 427. The sector plate 422 contacts the threaded groove of the grounding terminal 427, increasing the friction force with the grounding terminal 427, ensuring that the sector plate 422 can be stuck between the inner side surface of the grounding terminal 427 and the wire of the grounding system, further achieving better wrapping and avoiding looseness.

[0048] A plurality of sector plates 422 are fixedly connected with temperature detectors 428 on one side inside the insulating cylinder 421. The temperature detectors 428 are evenly distributed along the circumference of the grounding terminal 427. When the electromagnetic plate 426 becomes loose from the wire of the grounding system, the electromagnetic plate 426 cannot form a closed loop, the current cannot pass through, the heat generation is reduced, and the temperature detector 428 feeds back the degree of heat reduction to the control panel 5, enabling the operator to quickly detect it and avoid the danger of charge accumulation. The temperature detector 428 is arranged outside the grounding terminal 427, closer to the electromagnetic plate 426. The resistance value of the electromagnetic plate 426 is usually greater than that of the wire, and the temperature difference before and after the loop is disconnected is large, which can be better detected by the temperature detector 428.

[0049] On the side of the grounding terminal 427 away from the sector plate 422, an insulating spring 429 is fixedly connected. One end of the insulating spring 429 away from the grounding terminal 427 is fixedly connected to the bottom plate 1, and the insulating spring 429 is sleeved outside the limiting cylinder 423. The wire of the grounding system is inserted into the grounding terminal 427 and contacts the electromagnetic plate 426. The electromagnetic plate 426 moves, driving the grounding terminal 427 and the grounding wire 424 to move, and the insulating spring 429 compresses, which can prevent the wire from hitting the electromagnetic plate 426 and avoid damage and deformation of both. At the same time, under the elastic force of the insulating spring 429 restoring its deformation, the grounding terminal 427 presses the sector plate 422 more tightly, and can better seal the wire of the grounding system through the sector plate 422 to obtain a better insulation effect.

[0050] Example 2, please refer to Figures 1-9 , the winding assembly 43 includes a slide bar 431. The two ends of the slide bar 431 are respectively fixedly connected to the two parallel inner sides of the box body 41. Outside the slide bar 431, winding drums 432 are symmetrically arranged. The inner side of the winding drum 432 is slidably connected to the surface of the slide bar 431. On the sides of the two winding drums 432 away from each other, winding springs 433 are fixedly connected. One end of the two winding springs 433 away from each other is fixedly connected to the inner side of the box body 41, and the connecting wire 46 is wound around the surface of the winding drum 432. On the sides of the box body 41 close to both ends of the connecting wire 46, chutes 45 are opened. The inner side of the chute 45 is slidably connected to the surface of the connecting wire 46. When the connecting wire 46 is tightened, it drives the winding drum 432 to rotate, drives the winding spring 433 to twist, and at the same time the winding spring 433 is stretched. The two winding drums 432 slide away from each other on the surface of the slide bar 431, and the connecting wire 46 slides inside the chute 45. When winding up, the winding spring 433 provides the elastic force for the movement and rotation of the winding drum 432 at the same time, so that the winding drum 432 rotates while approaching each other, and can quickly wind the connecting wire 46 into the box body 41, thus realizing rapid insulation when falling off and rapid winding up when idle.

[0051] The connection component 44 includes a connection terminal 441. On one side of the connection terminal 441 close to the box body 41, an electromagnetic ring 442 is fixedly connected. The inner side surface of the electromagnetic ring 442 is fixedly connected to the surface of the connection wire 46 far from one end of the detection component 3. And the connection terminal 441 and the electromagnetic ring 442 are slidably connected to the surface of the box body 41. On one side of the two connection terminals 441 close to each other, a metal block 443 is fixedly connected. And the metal block 443 is made of a magnetically conductive material. One end of the test object is connected to the grounding system through the grounding component 42. The wire of the test object is inserted into the connection terminal 441. A closed loop is formed among the wire of the test object, the electromagnetic ring 442, the connection wire 46 and the ground. When the electromagnetic ring 442 works, the two electromagnetic rings 442 generate an attractive magnetic force. The metal block 443 is magnetically conductive, so that the two connection terminals 441 adsorb each other, avoiding the winding of the connection wire 46. At this time, the winding spring 433 is in a stretched and twisted state, and the connection wire 46 is in a unwinding state. When the connection between the connection terminal 441 and the wire of the test object becomes loose, the closed loop of one or both electromagnetic rings 442 disappears, and the adsorption force disappears. Under the elastic force of the winding spring 433, the connection wire 46 quickly winds up and enters the interior of the box body 41, avoiding contact with the ground, thereby avoiding electric shock to the experimenter. At the same time, the movement of the connection terminal 441 is obvious and can be quickly detected by the experimenter. Compared with instrument detection, although the degree of leakage cannot be determined, it can quickly warn the experimenter.

[0052] A protective sleeve 444 is arranged outside the connection terminal 441. One side of the protective sleeve 444 close to the box body 41 is in limit sliding connection with the sliding groove 45. The protective sleeve 444 is made of an insulating elastic material. On one side of the protective sleeve 444 close to the connection terminal 441, bent plates 445 are symmetrically arranged. One end of the bent plates 445 far from each other is fixedly connected to the inner side surface of the protective sleeve 444. One end of the bent plates 445 far from the protective sleeve 444 bends and extends into the interior of the protective sleeve 444. And the bent plates 445 are made of an insulating elastic material. Before the experiment, the connection terminal 441 and the metal block 443 are both protected inside the protective sleeve 444. When the protective sleeve 444 is squeezed, the metal block 443 squeezes the bent plates 445, and the bent plates 445 deform, and the connection terminal 441 and the metal block 443 are exposed. Then the wire of the test object is connected, and the adsorption and fixation are completed. When the adsorption disappears, the connection terminals 441 move away from each other. The connection terminals 441 contact the bent plates 445, the bent plates 445 deform, and the connection terminal 441 and the metal block 443 quickly return to the interior of the protective sleeve 444, forming an insulating protection again.

[0053] Before the experiment, the detection component 3 and the test sample to be detected are connected to the inside of the grounding system through the grounding component 42. The wire of the grounding system is inserted into the inside of the insulating cylinder 421. Several sector plates 422 are deformed to wrap the wire. One end of the grounding wire 424 away from the grounding terminal 427 is connected to the detection component 3. The wire of the grounding system is inserted into the inside of the insulating cylinder 421, and the wire enters the inside of the grounding terminal 427 and finally contacts the electromagnetic plate 426. The electromagnetic plate 426 is connected to the grounding system to form a closed loop. The electromagnetic plate 426 generates a magnetic force to adsorb the wire of the grounding system, completing the connection with the grounding system. When the electromagnetic plate 426 and the wire of the grounding system become loose, the electromagnetic plate 426 cannot form a closed loop, the current cannot pass through, the heat generation decreases, and the temperature detector 428 feeds back the degree of heat reduction to the control panel 5, enabling the operator to quickly detect it. Subsequently, the detection component 3 is connected to the AC power supply through the access terminal 6, and the detection component 3 is powered on and starts. The current sequentially passes through the connecting wire 46 and the test sample, and finally the current passes through the grounding component 42 and is connected to the grounding system. Before the experiment, the connection terminal 441 and the metal block 443 are both protected inside the protective sleeve 444. The protective sleeve 444 is squeezed, the metal block 443 squeezes the bending plate 445, the bending plate 445 is deformed, and the connection terminal 441 and the metal block 443 are exposed. The connecting wire 46 is tightened, driving the winding drum 432 to rotate, driving the winding spring 433 to twist. At the same time, the winding spring 433 generates tension, and the two winding drums 432 slide away from each other on the surface of the sliding rod 431. The connecting wire 46 slides inside the chute 45, and then the wire connected to the test sample is connected. A closed loop is formed among the wire of the test sample, the electromagnetic ring 442, the connecting wire 46, and the ground. The electromagnetic ring 442 works, and the two electromagnetic rings 442 generate an attractive magnetic force. The metal block 443 is magnetically conductive, causing the two connection terminals 441 to adsorb each other to prevent the connecting wire 46 from being wound up. When the connection between the connection terminal 441 and the wire of the test sample becomes loose, the closed loop of one or both electromagnetic rings 442 disappears, and the adsorption force disappears. Under the elastic force of the winding spring 433, the connecting wire 46 is quickly wound up and enters the inside of the box body 41 to avoid contacting the ground, thereby preventing the experimenter from getting an electric shock. The detection component 3 obtains detection data to complete the experiment, and the experimental data is finally displayed on the display screen of the control panel 5.

[0054] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art and related fields without creative efforts shall fall within the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art without special instructions and limitations.

Claims

1. A variable frequency series resonance withstand voltage test equipment, characterized in that: include: A base plate (1), the side of the base plate (1) being fixedly connected to a support leg (2), the top of the base plate (1) being fixedly connected to a detection component (3) via bolts, the detection component (3) being used to detect parameters of a test object; A connecting mechanism (4), the connecting mechanism (4) having a fixed structure and used for connecting to a test object; Wherein, the connecting mechanism (4) comprises: A box (41), the box (41) is made of an insulating material and is used to protect the test object. The box (41) is fixedly connected to the top of the bottom plate (1) away from the detection component (3), and a connecting wire (46) is slidably connected inside the box (41); A winding assembly (43), the winding assembly (43) being fixedly connected to the interior of the box (41), and the connecting wire (46) being wound on the surface of the winding assembly (43), a side of the connecting wire (46) away from the detection assembly (3) being fixedly connected to a connecting assembly (44), and the connecting assembly (44) being slidably connected to an outer side surface of the box (41); A grounding component (42), the grounding component (42) having an insulating structure and used for connecting to a grounding system, the grounding component (42) being arranged on a side of the base plate (1) away from the detection component (3), and the grounding component (42) extending through the base plate (1) to the inside of the detection component (3), and the outer side surface of the grounding component (42) being slidably connected to the inner side surface of the base plate (1); The grounding assembly (42) comprises an insulating cylinder (421), a plurality of insulating cylinders (421) are arranged at the bottom of the base plate (1), an end surface of the insulating cylinder (421) is fixedly connected to a side of the base plate (1) away from the box body (41), a fan-shaped plate (422) is fixedly connected to a side of the insulating cylinder (421) away from the base plate (1), and a plurality of fan-shaped plates (422) are evenly distributed along the circumference of the insulating cylinder (421), and the fan-shaped plates (422) are made of a flexible insulating material; A spring rod (425) is fixedly connected to one side of the bottom plate (1) close to the insulating cylinder (421); an end of the spring rod (425) away from the bottom plate (1) passes through the insulating cylinder (421) and extends to the inside of the fan-shaped plate (422); a surface of the spring rod (425) is fixedly connected to the inner side surface of the insulating cylinder (421); and a surface of the spring rod (425) is fixedly connected to the inner side surface of the fan-shaped plate (422); The connection component (44) comprises a connection terminal (441), a side of the connection terminal (441) close to the box (41) is fixedly connected to an electromagnetic ring (442), an inner side surface of the electromagnetic ring (442) is fixedly connected to a surface of a connection wire (46) at one end away from the detection component (3), and the connection terminal (441), the electromagnetic ring (442) and the surface of the box (41) are slidably connected, and a metal block (443) is fixedly connected to the sides of the two connection terminals (441) close to each other, and the metal block (443) is made of a magnetic conductive material.

2. The variable frequency series resonance withstand voltage test equipment according to claim 1, characterized in that: A control panel (5) is fixedly connected to a side of the detection component (3) away from the box (41), and an access terminal (6) is also fixedly connected to the surface of the detection component (3), and the access terminal (6) is arranged on an outer surface of the detection component (3) perpendicular to the box (41).

3. The variable frequency series resonance withstand voltage test equipment according to claim 2, characterized in that: A grounding terminal (427) is arranged inside the insulating cylinder (421), and the inner side surface of the grounding terminal (427) is fixedly connected to a limiting cylinder (423), one end of the limiting cylinder (423) away from the grounding terminal (427) extends into the interior of the detection component (3), and the limiting cylinder (423) and the bottom plate (1) slide in the axial direction of the limiting cylinder (423), the surface of the limiting cylinder (423) located inside the detection component (3) is slidably connected to the inner side surface of the detection component (3), the inner side surface of the limiting cylinder (423) is slidably connected to a grounding wire (424), one end of the grounding wire (424) close to the grounding terminal (427) is fixedly connected to an electromagnetic plate (426), the surface of the electromagnetic plate (426) is slidably connected to the inner side surface of the grounding terminal (427), and a threaded groove is provided on the inner side surface of the grounding terminal (427) away from the electromagnetic plate (426).

4. The variable frequency series resonance withstand voltage test equipment according to claim 3, characterized in that: A temperature detector (428) is fixedly connected to one side of a plurality of the sector plates (422) located inside the insulating cylinder (421), and the temperature detectors (428) are evenly distributed along the circumference of the ground terminal (427).

5. The variable frequency series resonance withstand voltage test equipment according to claim 4, characterized in that: An insulating spring (429) is fixedly connected to a side of the grounding terminal (427) away from the fan-shaped plate (422), one end of the insulating spring (429) away from the grounding terminal (427) is fixedly connected to the bottom plate (1), and the insulating spring (429) is sleeved on the outside of the limiting cylinder (423).

6. The variable frequency series resonance withstand voltage test equipment according to claim 5, characterized in that: The winding assembly (43) comprises a slide bar (431), the two ends of the slide bar (431) are respectively fixedly connected to two parallel inner side surfaces of the box body (41), a winding drum (432) is symmetrically arranged outside the slide bar (431), the inner side surface of the winding drum (432) is slidably connected to the surface of the slide bar (431), the two winding drums (432) are fixedly connected to the sides away from each other with winding springs (433), the two winding springs (433) are fixedly connected to the inner side surface of the box body (41), and the connecting wire (46) is wound on the surface of the winding drum (432), and the side surfaces of the box body (41) close to the two ends of the connecting wire (46) are provided with sliding grooves (45), and the inner side surfaces of the sliding grooves (45) are slidably connected to the surface of the connecting wire (46).

7. The variable frequency series resonance withstand voltage test equipment according to claim 6, characterized in that: The outside of the connecting terminal (441) is provided with a protective cover (444), and the side of the protective cover (444) close to the box body (41) is connected to the slide groove (45) in a limited sliding manner, and the protective cover (444) is made of an insulating elastic material. The side of the protective cover (444) close to the connecting terminal (441) is symmetrically provided with a bent plate (445), and the ends of the bent plates (445) away from each other are fixedly connected to the inner side surface of the protective cover (444), and the end of the bent plate (445) away from the protective cover (444) is bent and extends into the inside of the protective cover (444), and the bent plate (445) is made of an insulating elastic material.

Images