A portable resonant AC withstand voltage test device with adjustable inductance and capacitance

Abstract

This invention discloses a portable resonant AC withstand voltage test device with adjustable inductance and capacitance, addressing the problems of large size, heavy weight, high cost, difficult assembly, and high installation risk in existing technologies. This invention achieves resonant frequency adjustment through a capacitor + inductor adjustment method, thus requiring only one adjustable reactor. This not only reduces adjustment difficulty but also decreases equipment weight, size, and cost. Furthermore, it includes a detachable reactor hoisting device, improving installation convenience and efficiency while reducing installation risks. Additionally, mounting each series-connected reactor on a vertically fixed base prevents the reactors from tipping over and reduces installation height, thereby improving assembly safety. Therefore, this invention enables both power frequency AC withstand voltage and variable frequency AC withstand voltage tests using smaller equipment and at a lower cost.

Description

Technical Field

[0001] The invention belongs to the technical field of AC withstand voltage test, and in particular relates to a portable resonant AC withstand voltage test device with adjustable inductance and capacitance. Background Art

[0002] In accordance with the requirements of the electrical equipment handover and maintenance regulations, electrical equipment must be subjected to an AC withstand voltage test after new installation and maintenance to assess whether the insulation condition of the electrical equipment meets the requirements; currently, a series resonant withstand voltage test device is generally used for withstand voltage tests. The test equipment consists of a variable frequency power supply, a step-up transformer, a high-voltage reactor, a high-voltage capacitor divider and a voltage equalizing cover. The higher the voltage level, the greater the required test voltage and current, the larger the test capacity, and the size and weight of the equipment also increase accordingly.

[0003] In actual use, the iron core inside the tuned inductor of the series tuned inductor resonant AC withstand voltage device is not closed, and there is a certain air gap. The inductance can be adjusted by adjusting the gap of the iron core inside the reactor. However, when the reactor is running, there is a large magnetic field in the iron core, which will generate a large electric force. Therefore, it is difficult to adjust the iron core gap. At the same time, there is an iron core inside the tuned inductor, and the winding and the iron core maintain a certain insulation distance. Under the same voltage and capacity, the volume of the tuned inductor will be more than twice the volume of the fixed inductor reactor, and the weight and price will be more than three times that of the fixed inductor reactor. Based on this, a crane is required for installation, which will cause problems such as cumbersome on-site testing, low work efficiency, high testing costs, and difficult on-site assembly.

[0004] In addition, in order to meet the test requirements, the reactors need to be connected in series on site. However, due to the large size and weight of the adjustable inductance reactor, it is very difficult to assemble and disassemble it manually, and the installation risk is relatively high. At present, the series connection is achieved by setting mounting seats at the head and tail ends of the reactor, that is, adjacent reactors are threadedly connected through the mounting seats on the corresponding ends, thereby realizing the series connection of the two. However, the aforementioned series connection method requires additional mounting seats, which will not only increase the height of the reactor after the series connection, but also after the multiple sections of the reactor are installed in series, there is no screw fixation, and there is a risk of tipping over, thereby further increasing the difficulty and risk of installation. Therefore, based on the aforementioned deficiencies, how to provide a portable adjustable inductance and capacitance resonant AC withstand voltage test device with high installation safety, convenient installation, small size, light weight and low cost has become a problem to be solved urgently. Summary of the invention

[0005] The purpose of the present invention is to provide a portable resonant AC withstand voltage test device with adjustable inductance and capacitance, so as to solve the problems of large equipment size, heavy weight, high cost, difficult assembly and high installation risk in the prior art.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] In a first aspect, a portable resonant AC withstand voltage test device with adjustable inductance and capacitance is provided, comprising:

[0008] A reactor device, wherein the reactor device comprises a first reactor and a plurality of second reactors, each second reactor and the first reactor are sequentially connected in series from top to bottom, and the first reactor is a tuned inductor reactor, and each second reactor is a fixed inductor reactor;

[0009] A fixing device, the fixing device comprising a base and a fixing mechanism, wherein the fixing mechanism is vertically fixed on the base, the first reactor and each second reactor are sleeved on the fixing mechanism, so as to maintain the stability of each reactor after being connected in series based on the fixing mechanism, and a reactor hoisting device is detachably installed on the base;

[0010] Capacitor equipment, the capacitor equipment includes a plurality of compensation capacitors and a capacitor access mechanism, wherein the capacitor access mechanism is used to control each compensation capacitor to electrically connect to the reactor equipment or disconnect the electrical connection with the reactor equipment, the first reactor is provided with an inductance adjustment device, and the inductance adjustment device and the capacitor access mechanism are used to adjust the inductance and capacitance of the resonant AC withstand voltage test device, and after adjustment, the resonant AC withstand voltage test device reaches the test resonant frequency.

[0011] Based on the above disclosed content, the present invention is provided with a reactor device and a capacitor device, that is, the inductance and capacitance are adjusted by the reactor device and the capacitor device, so as to adjust the resonant frequency; wherein, by adopting the above method, the entire device only needs to use one inductance-adjusting reactor, thereby avoiding the problems of large volume, heavy weight and high cost existing in the traditional technology of using all inductance-adjusting reactors, and at the same time, by controlling the number of capacitors connected to the test device to adjust the capacitance, and by using an additional inductance adjustment device to adjust the inductance of the device, the difficulty of adjusting the resonant frequency can be reduced; further, when the reactor is used, When connected in series, a fixing mechanism is vertically arranged, and each reactor is sleeved on the fixing mechanism. In this way, the fixing mechanism can not only prevent the reactors after series connection from tipping over, thereby improving the safety of assembly, but also reduce the installation height. In addition, the present invention is provided with a detachable reactor lifting device on the base. Based on this, during the test, there is no need for manual or crane lifting for assembly and disassembly, which can improve the convenience and efficiency of installation while reducing the risk of installation. Therefore, the present invention can realize industrial frequency AC withstand voltage and variable frequency AC withstand voltage tests using smaller equipment and lower cost, so it is very suitable for large-scale application and promotion.

[0012] In a possible design, the first reactor and each second reactor are provided with a first through hole in the vertical direction, wherein the fixing mechanism passes through the first through holes on each second reactor and the first reactor, and is fixedly connected to the base;

[0013] The first inductor and each second inductor are provided with a head end terminal and a tail end terminal on the side walls, and the tail end terminal corresponding to any inductor is electrically connected to the head end terminal of the target inductor through a connector to realize the series connection between any inductor and the target inductor, wherein the target inductor is an inductor adjacent to and below any inductor.

[0014] In a possible design, the fixing mechanism includes: an insulating bolt, wherein a threaded hole is provided on the base, and the insulating bolt passes through the first through hole in each second inductor and the first inductor from top to bottom and is threadedly connected in the threaded hole.

[0015] In a possible design, the fixing device further includes: an insulating mounting seat, and the insulating mounting seat is provided with a second through hole;

[0016] The insulating mounting seat is arranged below the first reactor, and the insulating bolt passes through the first through hole on the first reactor and the second through hole on the insulating mounting seat, and is threadedly connected in the threaded hole;

[0017] The first reactor and each second reactor are also provided with a carrying hole, and each carrying hole is communicated with the first through hole in the corresponding reactor.

[0018] In a possible design, the reactor hoisting equipment includes: a hoisting winch, a hoisting arm, a first pulley, a second pulley, a steel rope, a hook and a rotating mechanism, and the rotating mechanism is detachably mounted on the base;

[0019] The hoisting winch and the boom are installed on the rotating end of the rotating mechanism, wherein the first pulley and the second pulley are provided on the boom, the steel rope is wound around the first pulley and the second pulley, and one end of the steel rope is fixedly connected to the hoisting winch, and the other end of the steel rope is connected to the hook.

[0020] In one possible design, the inductance adjustment device includes: a plurality of coil taps, an inductance carbon brush, and a carbon brush moving mechanism;

[0021] A plurality of coil taps are sequentially installed on the side wall of the first reactor from bottom to top, wherein each coil tap is electrically connected to the coil in the first reactor, and a gap between two adjacent coil taps is filled with an insulating filler;

[0022] The moving end of the carbon brush moving mechanism is fixedly connected to the inductor carbon brush and is used to move the inductor carbon brush to coil taps at different positions to complete the adjustment of inductance.

[0023] In a possible design, the capacitor device further includes: a capacitor base, a capacitor voltage divider, a capacitor grading ring and an insulating support, and the capacitor grading ring is electrically connected to the reactor device;

[0024] The capacitive voltage divider, the insulating pillar, the capacitor access mechanism and a plurality of compensation capacitors are all arranged on the capacitor base, wherein the capacitor grading ring is installed on the insulating pillar, and the capacitive voltage divider is electrically connected to the capacitor grading ring;

[0025] The capacitor access mechanism is used to convert each compensation capacitor from a horizontal placement state to a vertical placement state, or from a vertical placement state to a horizontal placement state, wherein when any compensation capacitor is converted from a horizontal placement state to a vertical placement state, any compensation capacitor is connected to the capacitor grading ring.

[0026] In one possible design, the reactor device also includes: a reactor grading ring, wherein the reactor grading ring is an open-loop structure, the reactor grading ring is electrically connected to the second reactor at the top, and the reactor grading ring is electrically connected to the capacitor grading ring through a wire.

[0027] In a possible design, it also includes: a control device, wherein the control device is used to collect voltage data and current data of the reactor device, and the control end of the control device is electrically connected to the controlled end of the inductance adjustment device and the capacitor access mechanism respectively.

[0028] In a possible design, the control device includes: a voltage and current collector, a controller and a display screen, wherein the voltage and current collectors are respectively electrically connected to the inductance adjustment terminals of the inductance adjustment device, and the output terminals of the voltage and current collectors are electrically connected to the controller;

[0029] The controller is electrically connected to the display screen, and the control end of the controller is electrically connected to the controlled end of the inductance adjustment device and the capacitor access mechanism respectively.

[0030] Beneficial effects:

[0031] (1) The present invention adjusts the resonant frequency of the AC withstand voltage test device by adjusting the capacitance + inductance. In this way, the entire device only needs to use one inductor. Therefore, compared with the traditional technology, it not only reduces the difficulty of adjustment, but also reduces the weight, volume and cost of the equipment. At the same time, it is equipped with a detachable reactor lifting device, which can improve the convenience and efficiency of installation while reducing the risk of installation. In addition, when the reactors are connected in series, a fixing mechanism is vertically arranged, and each reactor is mounted on the fixing mechanism. In this way, the reactors after series connection can be prevented from tipping over and the installation height can be reduced, thereby improving the safety of assembly. Therefore, the present invention can realize industrial frequency AC withstand voltage and variable frequency AC withstand voltage tests using smaller equipment and lower cost. Therefore, it is very suitable for large-scale application and promotion.

[0032] (2) The present invention provides a through hole on each reactor for installing an insulating bolt, and also provides a hand hole connected to the through hole. Based on this, the reactor is configured as a hollow structure based on the through hole, which can facilitate heat dissipation of the reactor.

[0033] (3) The present invention provides an insulating mounting seat between the bottom reactor and the base, so that there is a certain insulation distance between the input high voltage and the base to prevent discharge breakdown, thereby improving the safety of use.

[0034] (4) The present invention arranges a plurality of coil taps on the side wall of the inductor, and drives the inductor carbon brush to move to the coil taps at different positions through a carbon brush moving mechanism, so that different voltages can be obtained, thereby realizing the adjustment of the inductance; based on this, the adoption of this inductance adjustment method greatly reduces the adjustment difficulty compared with the traditional adjustment of the core gap.

[0035] (5) The present invention is also provided with a voltage and current collector and a controller, which can automatically control the connection of the capacitor and the movement of the inductor brush head by collecting the voltage data and current data of the reactor equipment, thereby automatically adjusting the resonant frequency of the device; based on this, the automation of inductance and capacitance adjustment is realized; therefore, the convenience of use is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of the structure of a portable resonant AC withstand voltage test device with adjustable inductance and capacitance provided in an embodiment of the present invention;

[0037] Figure 2 A schematic diagram of the structure of a second reactor provided in an embodiment of the present invention;

[0038] Figure 3 A schematic diagram of the structure of the series connection of reactors provided by an embodiment of the present invention;

[0039] Figure 4 A schematic diagram of fixing a reactor provided in an embodiment of the present invention;

[0040] Figure 5 A schematic diagram of the structure of a reactor hoisting device provided in an embodiment of the present invention;

[0041] Figure 6 A schematic diagram of the structure of an inductance adjustment device provided in an embodiment of the present invention;

[0042] Figure 7 A schematic diagram of one structure of a capacitor access mechanism provided in an embodiment of the present invention.

[0043] Reference numerals:

[0044] 10-first reactor; 20-second reactor; 30-base; 40-fixing mechanism; 50-compensating capacitor; 60-hoisting winch; 70-jib; 80-first pulley; 90-second pulley; 100-steel rope; 110-hook; 120-coil tap; 130-inductor carbon brush; 140-capacitor base; 150-capacitor voltage divider; 160-capacitor equalizing ring; 170-insulating support; 180-reactor equalizing ring; 190-stepping motor; 200-insulating lead screw; 210-insulating slide rail; 220-capacitor drive motor; 230-reduction gear; 240-transmission gear; 250-rotating shaft; 11-first through hole; 12-head terminal; 13-end terminal; 41-insulating mounting seat; 42-hand hole. DETAILED DESCRIPTION

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0046] It should be understood that although the terms first, second, etc. may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another unit. For example, a first unit can be referred to as a second unit, and similarly, a second unit can be referred to as a first unit without departing from the scope of the exemplary embodiments of the present invention.

[0047] It should be understood that the term "and / or" that may appear in this article is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" that may appear in this article describes another type of association object relationship, indicating that two relationships may exist. For example, A / and B can represent two situations: A exists alone, and A and B exist alone. In addition, the character " / " that may appear in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0048] Example:

[0049] See also Figures 1 to 7 As shown, the portable resonant AC withstand voltage test device with adjustable inductance and capacitance provided in this embodiment may include but is not limited to: reactor equipment, capacitor equipment, fixing equipment and reactor lifting equipment; wherein the reactor equipment and capacitor equipment are respectively used to provide the reactor and capacitor required by the AC withstand voltage test device, so as to adjust the resonant frequency of the entire AC withstand voltage test device to the test resonant frequency by adjusting the capacitance and inductance; at the same time, the fixing equipment prevents the series-connected reactors from tipping over when the reactors are connected in series; and the matching reactor lifting equipment is used to assemble and disassemble the reactors, thereby improving the installation efficiency.

[0050] The specific structures of the above-mentioned devices are disclosed as follows:

[0051] See also Figure 1 and Figure 3 As shown, the reactor device may include, but is not limited to, a first reactor 10 and a plurality of second reactors 20; wherein, each second reactor 20 and the first reactor 10 are connected in series from top to bottom, and the first reactor 10 is a tuned inductance reactor, and each second reactor 20 is a fixed inductance reactor; in this way, by connecting each reactor in series, the voltage of the entire device can be increased to the voltage required for the test, thereby meeting the voltage requirement of the test; at the same time, since the present embodiment adopts a capacitor + inductance adjustment method to adjust the resonant frequency of the entire device, the present embodiment only requires one tuned inductance reactor to complete the inductance adjustment, that is, an inductance adjustment device is provided on the first reactor 10 to fine-tune the inductance based on the inductance adjustment device; of course, the specific adjustment method is described in detail below.

[0052] Furthermore, since the reactor device is composed of multiple reactors connected in series when in use, in order to prevent it from tipping over, this embodiment is also provided with a fixing device, the structure of which is as follows:

[0053] See also Figure 1 and Figure 4As shown, the fixing device may include, but is not limited to, a base 30 and a fixing mechanism 40, wherein the fixing mechanism 40 is vertically fixed on the base 30, and the first inductor 10 and each second inductor 20 are mounted on the fixing mechanism 40, so as to maintain the stability of each inductor connected in series based on the fixing mechanism 40; in this way, each inductor is mounted on the vertically arranged fixing mechanism 40, and the fixing mechanism 40 is fixed on the base 30, so that the inductors connected in series can be prevented from tipping over (equivalent to providing a fixing mechanism connected to the base inside the series controller to prevent the inductors from tipping over), thereby ensuring safety in use; at the same time, the present embodiment maintains the stability of the inductors connected in series through the fixing mechanism 40, so that adjacent inductors do not need to be fixed, based on this, compared with the traditional technology, there is no need to provide mounting seats at the head and tail ends of the inductors, thereby reducing the installation height and thus reducing the difficulty of assembly.

[0054] In this embodiment, the base 30 may be, but is not limited to, a cross-shaped structure. Figure 1 As shown, in this way, the stability of the base 30 can be ensured, thereby further improving the stability of the reactor installation.

[0055] In the specific implementation, in order to facilitate the assembly and disassembly of each reactor, the present embodiment is also equipped with a reactor lifting device, wherein the reactor lifting device is detachably installed on the base 30 for example; in this way, the reactor lifting device can be used to connect the reactors in series, thereby improving the assembly efficiency while improving the convenience and safety of assembly; of course, the specific structure of the aforementioned reactor lifting device is described in detail below.

[0056] Furthermore, it has been explained above that the present embodiment uses a capacitor + inductor method to adjust the resonant frequency, and therefore, a capacitor device needs to be configured to achieve capacitance adjustment; in specific applications, the capacitor device may include, but is not limited to, a plurality of compensation capacitors 50 and a capacitor access mechanism; wherein the capacitor access mechanism is used to control each compensation capacitor 50 to be electrically connected to the reactor device or to disconnect the electrical connection with the reactor device; in this way, the capacitance can be adjusted by controlling the number of compensation capacitors 50 connected to the reactor device; based on this, the inductance and capacitance of the resonant AC withstand voltage test device can be adjusted through the inductance adjustment device and the capacitor access mechanism, and after adjustment, the resonant AC withstand voltage test device reaches the test resonant frequency, thereby generating the maximum current and voltage at this frequency to complete the withstand voltage test of the electrical equipment.

[0057] Based on the foregoing description, the resonant AC withstand voltage test device provided in the present embodiment adjusts the device frequency by using a capacitance combined with an inductance adjustment method, so that only one inductance-adjusting reactor is required to achieve inductance adjustment. Thus, compared with the traditional inductance adjustment scheme based on the core gap, the number of inductance-adjusting reactors used is reduced, which not only reduces the difficulty of adjustment, but also reduces the weight, volume and cost of the entire device. At the same time, a vertically arranged fixing mechanism installed on the base is adopted to maintain the stability of each reactor after series connection. Based on this, not only the installation height is reduced, but also the risk of the reactor tipping over is avoided, thereby improving the safety of use. In addition, the device is equipped with a lifting device, by which the reactor can be assembled and disassembled, thereby improving the assembly efficiency while reducing the difficulty and risk of assembly. Therefore, the present embodiment can realize industrial frequency AC withstand voltage and variable frequency AC withstand voltage tests with smaller equipment and lower cost, thus being very suitable for large-scale application and promotion.

[0058] Optionally, the following provides a detailed structure of each of the aforementioned devices:

[0059] First, the specific structure of the reactor is disclosed as follows:

[0060] In this embodiment, the first reactor 10 and each second reactor 20 are provided with a first through hole 11 in the vertical direction, see Figure 2 As shown, the fixing mechanism 40 passes through the first through holes 11 on each second inductor 20 and the first inductor 10, and is fixedly connected to the base 30, so as to keep the series-connected inductors fixed. In this way, the first through holes 11 are provided in each inductor, which is equivalent to setting the inductor as a hollow structure. This structure not only facilitates the insertion of the fixing mechanism, thereby making the inductor less likely to shake and tip over, but also reduces the installation height.

[0061] Further, in order to facilitate the series connection of each reactor, for example, a head terminal 12 and a terminal terminal 13 are provided on the side walls of the first reactor 10 and each second reactor 20; see Figure 3As shown, taking any reactor as an example, its series connection structure is explained, that is, the end terminal 13 corresponding to any reactor is electrically connected to the head terminal 12 of the target reactor through a connector to realize the series connection between the any reactor and the target reactor, wherein the target reactor is a reactor adjacent to and below the any reactor; in this way, it is equivalent to connecting the end terminal of any of the aforementioned reactors to the head terminal of the next reactor to realize the series connection between the two; at the same time, the example connector can be but not limited to a wire, a connecting piece or a connector; of course, the specific connection method can be selected according to actual use, and is not limited to the aforementioned example.

[0062] Based on this, by connecting the head and tail terminals of adjacent reactors, the series connection of each second reactor 20 and the first reactor 10 can be achieved, thereby increasing the device voltage to the voltage required for the test.

[0063] Furthermore, one structure of the fixing mechanism is disclosed below:

[0064] See also Figure 4 As shown, for example, the fixing mechanism 40 may include but is not limited to: an insulating bolt, wherein a threaded hole is provided on the base 30, and the insulating bolt passes through the first through hole in each second inductor 20 and the first inductor 10 from top to bottom, and is threadedly connected in the threaded hole. In this way, it is equivalent to adding a fixing rod fixed to the base inside the series-connected inductor, so as to prevent the series-connected inductor from tipping over.

[0065] In the specific implementation, in order to increase the insulation space of the input high voltage, the example fixing device also includes an insulating mounting seat 41, and the insulating mounting seat 41 is provided with a second through hole; wherein, in actual use, the insulating mounting seat 41 is arranged below the first inductor 10, and the insulating bolt passes through the first through hole 11 on the first inductor 10 and the second through hole on the insulating mounting seat 41, and is threadedly connected in the threaded hole, so that the installation of the insulating mounting seat 41 is completed.

[0066] Based on this, it is equivalent to passing the insulating bolt through the first through hole 11 on each reactor and the second through hole on the insulating mounting seat 41 from top to bottom, and then screwing its bottom end into the threaded through hole on the base 30. At this time, it acts as a fixing rod to connect all reactors to the insulating mounting seat 41 in series, thereby preventing all reactors and the insulating mounting seat 41 from tipping over.

[0067] Based on this, not only the purpose of anti-dumping is achieved, but the setting of the insulating mounting seat 41 also realizes the function of voltage isolation (that is, the insulation distance of the input high voltage is increased), thereby improving the safety of use.

[0068] Also, see Figure 2 As shown, this embodiment is further provided with a carrying hole 42 on the first inductor 10 and each second inductor 20, and each carrying hole 42 is connected to the first through hole 11 in the corresponding inductor; in this way, the carrying hole 42 not only facilitates the transportation and disassembly of the inductor, but also can guide the heat generated by the inductor from the through hole into the carrying hole for discharge, thereby achieving the purpose of heat dissipation.

[0069] In this embodiment, reactors of different voltages may be selected according to actual use, and no specific limitation is given here.

[0070] Thus, through the above-mentioned detailed explanation of the reactor structure and the fixing mechanism, the present embodiment adopts a hollow-structured reactor, and after being connected in series, it is kept stable by insulating bolts fixed internally at the bottom. In this way, the reactor after series connection is not easy to shake or tip over, thereby improving the safety of use. Moreover, when adopting the above-mentioned structure, there is no need to set up an additional mounting base when connected in series, thereby reducing the installation height. In addition, the hollow structure also facilitates the heat dissipation of the reactor, thereby ensuring the safe operation of the reactor.

[0071] At the same time, in order to facilitate the assembly and disassembly of the reactor, the present embodiment is equipped with a reactor hoisting device, wherein one specific structure of the reactor hoisting device is disclosed below.

[0072] In this embodiment, the reactor lifting equipment may include but is not limited to: a lifting winch 60, a boom 70, a first pulley 80, a second pulley 90, a steel rope 100, a hook 110 and a rotating mechanism, and the rotating mechanism is detachably mounted on the base 30 (such as being connected to the base 30 by bolts); optionally, the rotating mechanism may include but is not limited to a turntable driven by a motor (that is, the motor is connected to the base 30 by bolts, a turntable base is installed on the base 30 by bolts, and the turntable is connected to the turntable base by a rotating shaft, and the motor drives the rotating shaft to rotate (such as through a gear transmission connection), thereby driving the turntable).

[0073] Furthermore, the connection structure of the aforementioned components is as follows:

[0074] See also Figure 5As shown in the figure, the hoisting winch 60 and the boom 70 are fixed on the rotating end of the rotating mechanism, that is, the rotating mechanism includes a motor and a turntable, and the turntable serves as the rotating end. Therefore, the hoisting winch 60 and the boom 70 are fixed on the turntable. In this way, when the turntable rotates, the boom 70 can be driven to rotate, thereby providing a rotation radius for the boom 70; wherein the first pulley 80 and the second pulley 90 are provided on the boom 70, the steel rope 100 is wound around the first pulley 80 and the second pulley 90, and one end of the steel rope 100 is fixed The hoisting winch 60 is fixedly connected, and the other end of the steel rope 100 is connected to the hook 110; in this way, the hoisting winch 60 can be used to pull the steel rope 100 wound on the two pulleys to move, thereby driving the hook 110 to hoist the reactor for assembly, or to disassemble the reactor after series connection (of course, when disassembling, each reactor is lifted from top to bottom to detach the insulating bolts, thereby completing the disassembly of the reactor after series connection); optionally, the hand hole on the reactor can be used as an anchor point, connected to the hook 110 through a hoisting line, so as to realize the hoisting of the reactor.

[0075] In this embodiment, the example boom 70 may include but is not limited to a plurality of hanging pipes, wherein the plurality of hanging pipes are threadedly connected to form the boom. In this way, the height of the boom can be increased or decreased according to actual use requirements, thereby meeting the assembly requirements of reactors of different heights. In addition, the example hanging pipe may include but is not limited to steel pipes or aluminum alloy pipes, and the hoisting winch 60 may include an electric winch. Of course, the specific materials used and the type of winch are not specifically limited here.

[0076] In this way, through the above-mentioned design, the problem of difficulty in manual lifting, installation and disassembly of the reactor can be solved, and the high cost of using a crane for installation can be avoided, thereby achieving high-efficiency, high-convenience and high-safety assembly and disassembly of the reactor; of course, the reactor lifting equipment can also realize the transportation of other components, and is not limited to the use of reactors.

[0077] After completing the structural description of the aforementioned equipment for assembling and fixing the reactor, the specific structure of inductance and capacitance adjustment is disclosed below; wherein, this embodiment first provides one specific structure of the inductance adjustment equipment.

[0078] In a specific embodiment, the inductance adjustment device may include, but is not limited to: a plurality of coil taps 120, an inductance carbon brush 130 and a carbon brush moving mechanism; wherein the connection structure of the aforementioned components is:

[0079] See also Figure 6As shown, a plurality of coil taps 120 are sequentially installed on the side wall of the first inductor 10 from bottom to top, wherein each coil tap 120 is electrically connected to the coil in the first inductor 10, and the gap between two adjacent coil taps 120 is filled with insulating filler; at the same time, the moving end of the carbon brush moving mechanism is fixedly connected to the inductor carbon brush 130, which is used to move the inductor carbon brush 130 to the coil taps 120 at different positions to complete the adjustment of the inductance.

[0080] Thus, in order to facilitate the adjustment of the inductance of the reactor, the present embodiment is equivalent to extracting a number of taps inside the reactor according to a certain number of turns of the coil, and then arranging the taps in order from bottom to top and insulating them; thus, by adjusting the carbon brush to slide to different positions of the taps, the inductance can be adjusted to obtain different voltages.

[0081] Optionally, for example, the present embodiment may be provided with, but not limited to, 33 coil taps 120, wherein the voltage difference between two adjacent coil taps 120 is 1 kV, and adjacent coil taps 120 are filled with insulating resin; based on this, filling with insulating resin can not only play an insulating role, but also can serve the purpose of fixing the coil taps 120; of course, the number of coil taps and insulating fillers can be specifically selected according to actual use, and is not limited to the aforementioned example.

[0082] Furthermore, one specific structure of the carbon brush moving mechanism is disclosed below:

[0083] See also Figure 6 As shown, for example, the carbon brush moving mechanism may include but is not limited to: a stepper motor 190, an insulating screw 200 and an insulating slide rail 210, wherein the insulating screw 200 is arranged along the setting direction of the coil tap 120 (i.e., vertically arranged), and the inductor carbon brush 130 is threadedly connected to the insulating screw 200; at the same time, the output shaft of the stepper motor 190 is connected to the insulating screw 200 to drive the insulating screw 200 to rotate, and the inductor carbon brush 130 is slidably connected to the insulating slide rail 210; in this way, by driving the insulating screw 200 to rotate through the stepper motor 190, the inductor carbon brush 130 can be driven to slide up and down in the insulating slide rail 210; based on this, the inductor carbon brush 130 can be moved to the coil tap 120 at different positions, thereby completing the adjustment of the inductance.

[0084] Of course, the aforementioned stepper motor 190 can be set on the insulating mounting seat 41, and the inductive carbon brush 130 is installed on the side wall of the first inductor 10; of course, the installation position can be specifically set according to actual use, and is not limited to the aforementioned example.

[0085] Therefore, through the above explanation, the inductance can be adjusted by moving the carbon brush to the coil taps at different positions; at the same time, the use of this inductance adjustment method greatly reduces the difficulty of adjustment compared to the traditional adjustment of the core gap, thereby improving the convenience of use.

[0086] After the detailed structure of the inductance adjustment device is described, this embodiment provides a detailed structure of a capacitor device.

[0087] In a possible design, the capacitor device may also include, but is not limited to: a capacitor base 140, a capacitor voltage divider 150, a capacitor grading ring 160 and an insulating support 170, and the capacitor grading ring 160 is electrically connected to the reactor device; wherein the connection structure of the aforementioned components is:

[0088] The capacitive voltage divider 150, the insulating support 170, the capacitor access mechanism and a plurality of compensation capacitors 50 are all arranged on the capacitor base 140, wherein the capacitor grading ring 160 is installed on the insulating support 170, and the capacitive voltage divider 150 is electrically connected to the capacitor grading ring 160; at the same time, the capacitor access mechanism is used to convert each compensation capacitor 50 from a horizontal placement state to a vertical placement state, or from a vertical placement state to a horizontal placement state, and when any compensation capacitor 50 is converted from a horizontal placement state to a vertical placement state, any compensation capacitor is connected to the capacitor grading ring 160.

[0089] In this embodiment, each compensation capacitor 50 is in a horizontal position when not in use. Therefore, to adjust the capacitance of the entire device, one or more compensation capacitors 50 need to be connected to the capacitor grading ring 160; therefore, it is necessary to use a capacitor access mechanism to convert each compensation capacitor from a horizontal state to a vertical state, and contact it with the capacitor grading ring 160 (a contact spring can be provided on the compensation capacitor so that it can contact the capacitor grading ring through the contact spring when in a vertical state), thereby establishing an electrical connection with the reactor equipment.

[0090] In this embodiment, the capacitor access mechanism can be configured as follows: based on motor drive, and through a reduction gear and a transmission gear to drive the supplementary capacitor, the angle of which can be selected from 0 degrees to 90 degrees, and the transmission gear is fixedly connected to the compensation capacitor; wherein, the maximum weight of a compensation capacitor is 40 kg, and the rest are 25 kg, 18 kg, and 10 kg, with a length of 2.6 meters, and can be driven by a motor torque greater than 520 Nm.

[0091] Optional, see Figure 7As shown, a capacitor driving motor 220, a reduction gear 230 and a transmission gear 240 are installed on the capacitor base 140, wherein the output shaft of the capacitor driving motor 220 is connected to the reduction gear 230, and the reduction gear 230 is meshed with the transmission gear 240; further, the transmission gear 240 is connected to the capacitor base 140 through a rotating shaft 250, and the compensation capacitor 50 is fixed on the transmission gear 240 (the two can be connected by bolts to facilitate on-site assembly and disassembly), and the capacitor driving motor 220 is a reduction motor; further, the reduction motor can be connected to a controller, and its operation is controlled by the controller, that is, the controller controls The reduction motor drives the reduction gear 230 to rotate, and then drives the transmission gear 240 to rotate, thereby converting the compensation capacitor 50 from a horizontal state to a vertical state; similarly, when the reduction motor is reversed, the compensation capacitor 50 can be converted from a vertical state to a horizontal state (that is, the controller controls each compensation capacitor to rotate from a horizontal state to a vertical state, and connects to the circuit through the electrical connection between the spring piece and the capacitor equalizing ring 160; conversely, the compensation capacitor is controlled to rotate from a vertical state to a horizontal state and exit the circuit); in this embodiment, a capacitor access mechanism can be configured for each compensation capacitor 50, so as to realize the individual access control of each compensation capacitor 50.

[0092] Furthermore, the present embodiment also provides a reactor grading ring 180, see Figure 1 As shown, the reactor grading ring 180 is an open-loop structure (the open-loop structure can avoid the circulation phenomenon), the reactor grading ring 180 is electrically connected to the second reactor 20 at the top, and the reactor grading ring 180 is electrically connected to the capacitor grading ring 160 through a wire; in this way, it is equivalent to controlling the number of compensation capacitors connected to the reactor to adjust the capacitance. At the same time, the capacitor grading ring 160 and the reactor grading ring 180 are at the same potential, and a high voltage is applied to the test product.

[0093] In this embodiment, for example, the aforementioned reactor grading ring 180 and capacitor grading ring 160 can be made of, but not limited to, glass fiber or polyethylene, and coated with conductive paint, so as to achieve the purpose of conductive grading; at the same time, composite material resin is coated on the outer surface; based on this, it can have the characteristics of light weight, elasticity, and not easy to deform.

[0094] Meanwhile, the fixed capacitors of the aforementioned compensation capacitors 50 are taken as examples, and the specific capacity can be specifically set according to actual use, and is not limited to the aforementioned examples.

[0095] In addition, in the present embodiment, the resonant AC withstand voltage test device is also equipped with a control device, wherein the control device is used to collect voltage data and current data of the reactor device, and the control end of the control device is electrically connected to the controlled end of the inductance adjustment device and the capacitor access mechanism respectively; in this way, the required capacitance value and inductance value can be calculated through the collected voltage and current data, and based on this, the inductance adjustment device and the capacitor access mechanism are controlled to achieve the adjustment of inductance and capacitance.

[0096] In a specific implementation, the example control device may include but is not limited to: a voltage and current collector, a controller and a display screen, wherein the voltage and current collector is electrically connected to the inductance adjustment end of the inductance adjustment device (i.e., connected to the inductance carbon brush), and the output end of the voltage and current collector is electrically connected to the controller; at the same time, the controller is electrically connected to the display screen, and the control end of the controller is electrically connected to the inductance adjustment device and the controlled end of the capacitor access mechanism, respectively; in this way, the high voltage and current collected by the voltage and current collector can be used to calculate the adjustment value of the capacitance and inductance of the entire loop, and determine the number of capacitors that need to be connected, and then display it on the display screen; finally, after the user clicks to confirm on the display screen, the controller controls the capacitor access mechanism to turn the corresponding number of compensation capacitors from a horizontal state to a vertical state, thereby realizing the access of the capacitors.

[0097] If the resonant frequency cannot be reached after the compensation capacitor is put into use, then the stepper motor is controlled to drive the inductor carbon brush to move to the coil tap at the corresponding position to adjust the inductance, so as to finally reach the required test resonant frequency.

[0098] Thus, through the above description, the working process of this device is:

[0099] Assuming that the test resonant frequency is 50HZ, and the inductance value of each reactor is 95H, and 7 reactors are set, then according to the formula: (f is frequency, L is inductance, C is capacitance), the calculated capacitance value of the resonance in series is 15nF; at this time, 4 compensation capacitors are selected, respectively: voltage 460kV / 7.467nF (unit 8), 460kV / 3.733nF (unit 4), 460kV / 1.867nF (unit 2), 460kV / 0.933nF (unit 1), the capacitance of all compensation capacitors in parallel is 14nF, plus the capacitance of the capacitor divider 1nF, the total capacitance is 15nF.

[0100] When the test product is connected for the boost test, the test product has capacitance. For example, the capacitance is 0.93nF, which just reaches the minimum capacitance adjustment value of 0.933nF. If the capacitance of 0.933nF is not reduced, the total capacitance is 15.99nF. At this time, the inductance value needs to be adjusted to fine-tune the frequency to achieve resonance. According to the above formula, the inductance value is 625.4H, and the inductance of each reactor is 95H; therefore, the inductance of the adjustable reactor can be adjusted to 55.4H.

[0101] For example, if the test capacitance is 1.73nF, which exceeds the minimum capacitance adjustment value of 0.933nF and does not reach 1.867nF, subtract the resonant 0.933nF capacitor and the total capacitance is 15.2nF. At this time, it is necessary to adjust the inductance value to fine-tune the resonant frequency. According to the above formula, the inductance value is 657.9H, and the inductance of each reactor is 95H. At this time, the inductance of the adjustable reactor can be adjusted to 87.9H.

[0102] In this way, during the test, the capacitance of the test product and the inductance of the reactor are calculated through the test voltage, so as to obtain the inductance and series capacitance values ​​that need to be adjusted; at the same time, the capacitor can be divided into different units according to the capacitance value, so as to obtain different capacitance values ​​through the combination of different capacitors (i.e., connecting to the circuit); and if the resonant frequency cannot be reached by adjusting the capacitance, at this time, the inductance value of the reactor can be adjusted to match the test resonant frequency.

[0103] In addition, in this embodiment, when collecting voltage and current, it is necessary to first short-circuit the high-voltage voltage input terminal and the high-voltage voltage output terminal, that is, short-circuit the voltage input terminal (i.e., the first end) of the second inductor at the top and the inductor carbon brush. At this time, the inductance of the high-voltage inductor is zero; then apply a high voltage, and collect voltage and current data through the voltage and current collector to measure the capacitance of the test circuit, and count the compensation capacitors that need to be connected through the processor.

[0104] Therefore, through the above detailed description of the portable resonant AC withstand voltage test device with adjustable inductance and capacitance, the present invention can realize industrial frequency AC withstand voltage and variable frequency AC withstand voltage tests with a smaller device, which not only reduces the weight of the equipment, reduces the volume and cost, but also does not require crane operation and manpower handling during assembly, which is convenient, safe and efficient; therefore, it is very suitable for large-scale application and promotion.

[0105] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A portable resonant AC withstand voltage test device with adjustable inductance and capacitance, characterized in that: include: Reactor equipment, wherein the reactor equipment comprises a first reactor (10) and a plurality of second reactors (20), each second reactor (20) and the first reactor (10) are sequentially connected in series from top to bottom, the first reactor (10) is a tuned inductor reactor, and each second reactor (20) is a fixed inductor reactor; A fixing device, the fixing device comprising a base (30) and a fixing mechanism (40), wherein the fixing mechanism (40) is vertically fixed on the base (30), the first reactor (10) and each second reactor (20) are sleeved on the fixing mechanism (40), so as to maintain the stability of each reactor after being connected in series based on the fixing mechanism (40), and a reactor hoisting device is detachably mounted on the base (30); Capacitor equipment, the capacitor equipment comprising a plurality of compensation capacitors (50) and a capacitor access mechanism, wherein the capacitor access mechanism is used to control each compensation capacitor (50) to be electrically connected to the reactor equipment or to be disconnected from the reactor equipment, the first reactor (10) is provided with an inductance adjustment device, and the inductance adjustment device and the capacitor access mechanism are used to adjust the inductance and capacitance of a resonant AC withstand voltage test device, and after adjustment, the resonant AC withstand voltage test device reaches a test resonant frequency; The capacitor device further comprises: a capacitor base (140), a capacitor voltage divider (150), a capacitor grading ring (160) and an insulating support (170), and the capacitor grading ring (160) is electrically connected to the reactor device; The capacitive voltage divider (150), the insulating support (170), the capacitor access mechanism and a plurality of compensation capacitors (50) are all arranged on the capacitor base (140), wherein the capacitor grading ring (160) is mounted on the insulating support (170), and the capacitive voltage divider (150) is electrically connected to the capacitor grading ring (160); The capacitor access mechanism is used to convert each compensation capacitor (50) from a horizontal placement state to a vertical placement state, or from a vertical placement state to a horizontal placement state, wherein when any compensation capacitor (50) is converted from a horizontal placement state to a vertical placement state, the any compensation capacitor is connected to the capacitor grading ring (160).

2. A portable resonant AC withstand voltage test device with adjustable inductance and capacitance according to claim 1, characterized in that: The first reactor (10) and each second reactor (20) are each provided with a first through hole (11) in the vertical direction, wherein the fixing mechanism (40) passes through the first through hole (11) on each second reactor (20) and the first reactor (10), and is fixedly connected to the base (30); A head-end wiring terminal (12) and a tail-end wiring terminal (13) are provided on the side walls of the first reactor (10) and each second reactor (20), and the tail-end wiring terminal (13) corresponding to any reactor is electrically connected to the head-end wiring terminal (12) of the target reactor through a connector, so as to realize the series connection between any reactor and the target reactor, wherein the target reactor is a reactor adjacent to and located below any reactor.

3. A portable resonant AC withstand voltage test device with adjustable inductance and capacitance according to claim 2, characterized in that: The fixing mechanism (40) comprises an insulating bolt, wherein a threaded hole is provided on the base (30), and the insulating bolt passes through the first through holes in each second reactor (20) and the first reactor (10) from top to bottom and is threadedly connected in the threaded hole.

4. A portable resonant AC withstand voltage test device with adjustable inductance and capacitance according to claim 3, characterized in that: The fixing device further comprises: an insulating mounting seat (41), and a second through hole is provided on the insulating mounting seat (41); The insulating mounting seat (41) is arranged below the first reactor (10), and the insulating bolt passes through a first through hole (11) on the first reactor (10) and a second through hole on the insulating mounting seat (41), and is threadedly connected in the threaded hole; The first reactor (10) and each second reactor (20) are also provided with a carrying hole (42), and each carrying hole (42) is connected to a first through hole (11) in the corresponding reactor.

5. A portable resonant AC withstand voltage test device with adjustable inductance and capacitance according to claim 1, characterized in that: The reactor hoisting equipment comprises: a hoisting winch (60), a hoisting arm (70), a first pulley (80), a second pulley (90), a steel rope (100), a hook (110), and a rotating mechanism, and the rotating mechanism is detachably mounted on the base (30); The hoisting winch (60) and the boom (70) are mounted on the rotating end of the rotating mechanism, wherein the boom (70) is provided with the first pulley (80) and the second pulley (90), the steel rope (100) is wound around the first pulley (80) and the second pulley (90), and one end of the steel rope (100) is fixedly connected to the hoisting winch (60), and the other end of the steel rope (100) is connected to the hook (110).

6. A portable resonant AC withstand voltage test device with adjustable inductance and capacitance according to claim 1, characterized in that: The inductance adjustment device comprises: a plurality of coil taps (120), an inductance carbon brush (130) and a carbon brush moving mechanism; A plurality of coil taps (120) are sequentially mounted on the side wall of the first reactor (10) from bottom to top, wherein each coil tap (120) is electrically connected to a coil in the first reactor (10), and a gap between two adjacent coil taps (120) is filled with an insulating filler; The moving end of the carbon brush moving mechanism is fixedly connected to the inductor carbon brush (130) and is used to move the inductor carbon brush (130) to coil taps (120) at different positions to complete the adjustment of inductance.

7. A portable resonant AC withstand voltage test device with adjustable inductance and capacitance according to claim 1, characterized in that: The reactor device further comprises: a reactor grading ring (180), wherein the reactor grading ring (180) is an open-loop structure, the reactor grading ring (180) is electrically connected to the second reactor (20) at the top, and the reactor grading ring (180) is electrically connected to the capacitor grading ring (160) via a wire.

8. A portable resonant AC withstand voltage test device with adjustable inductance and capacitance according to claim 1, characterized in that: Also includes: A control device, wherein the control device is used to collect voltage data and current data of the reactor device, and the control end of the control device is electrically connected to the controlled end of the inductance adjustment device and the capacitor access mechanism respectively.

9. A portable resonant AC withstand voltage test device with adjustable inductance and capacitance according to claim 8, characterized in that: The control device comprises: a voltage and current collector, a controller and a display screen, wherein the voltage and current collector are respectively electrically connected to the inductance adjustment terminal of the inductance adjustment device, and the output terminal of the voltage and current collector is electrically connected to the controller; The controller is electrically connected to the display screen, and the control end of the controller is electrically connected to the controlled end of the inductance adjustment device and the capacitor access mechanism respectively.

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