Power plant electrical equipment insulation resistance detection device

Abstract

The invention discloses an insulation resistance detection device for electrical equipment in a power plant. The insulation resistance detection device comprises a shell and an internal detection mechanism, the detection mechanism comprises a detection module, a detection wire, a wire concentration seat and an installation device body. And the line concentration seat is provided with a first line concentration table, a second line concentration table and a third line concentration table which are symmetrically arranged and are respectively connected with the first, second, third, fourth detection line groups, and the latter is positioned outside the shell. According to the design, ordered wire concentration is realized, and each group of wires has an exclusive position, so that disorder is avoided. The line concentration table is provided with the interface, wire connection is simplified, an operator can rapidly connect the detection module and the external interface through the line concentration table, and detection efficiency and accuracy are improved. Meanwhile, crossed winding of wires is reduced, short circuit and electric shock risks are reduced, wire connection is more stable, detection failure or equipment damage caused by loosening and falling is reduced, and detection reliability and safety are improved. In short, the device improves the detection efficiency, enhances the safety and reliability, and provides powerful support for the insulation resistance detection of electrical equipment in a power plant.

Description

Technical Field

[0001] The invention belongs to the technical field of insulation detection devices for power plants, and relates to an insulation resistance detection device for electrical equipment in a power plant. Background Art

[0002] As a vital component of the power system, the operating status of power plant electrical equipment is directly related to the safety and stability of the entire power grid. During operation, these devices will be affected by a variety of internal and external factors, causing their performance to gradually change, which may in turn cause various faults.

[0003] From the perspective of internal factors, power frequency overvoltage is a problem that cannot be ignored. When electrical equipment is operating normally, if the system voltage rises above the rated value, power frequency overvoltage may occur, which will damage the insulation layer of the equipment and reduce its insulation performance. In addition, high-order harmonics are also an important factor affecting the insulation of electrical equipment. In the power system, the presence of nonlinear loads will generate a large number of high-order harmonics, which will be superimposed on the fundamental wave to form a complex waveform, which will put additional pressure on the insulation layer of the equipment. At the same time, high temperature environment will also accelerate the aging process of the insulation material of electrical equipment, thereby reducing its insulation performance.

[0004] External factors also have a significant impact on the insulation of electrical equipment. External electric fields may interfere with the normal operation of the equipment or even cause insulation breakdown. Harsh environmental conditions, such as high humidity, low or high temperatures, can damage the insulation layer of the equipment. Electrical equipment in high-voltage environments is more susceptible to physical phenomena such as arc discharge, which can damage the insulation layer. In addition, corrosion and mechanical stress are also important factors that affect the insulation of equipment. Corrosive gases or liquids may erode the insulation layer of the equipment, while mechanical stress may cause cracks or damage to the insulation layer.

[0005] In view of the above factors, power plants must conduct strict insulation tests on electrical equipment before they are put into operation. However, the internal wiring of traditional insulation testing devices is messy, which directly increases the complexity of the testing process. Operators need to spend more time and energy to sort out the wiring, which not only reduces the testing efficiency, but also may introduce errors due to human errors. In addition, the messy wiring may cause interference between signal lines, thereby affecting the accuracy of the test results and leading to misjudgment of the insulation status of electrical equipment. Secondly, messy wiring is prone to entanglement, short circuit and other problems during the testing process, which will not only damage the testing device, but also cause dangers such as electric shock to operators, seriously threatening their lives. At the same time, the messy wiring will also affect the overall performance and stability of the testing device. Summary of the invention

[0006] In view of the problems existing in the prior art, the present invention provides an insulation resistance detection device for electrical equipment in a power plant, thereby solving the technical problems in the prior art that the detection results may have errors due to the cluttered internal circuits of the detection device, the detection process is complicated, and the equipment safety is poor.

[0007] The present invention is achieved through the following technical solutions:

[0008] An insulation resistance detection device for electrical equipment in a power plant, comprising a housing and a detection mechanism arranged inside the housing; the detection mechanism comprises a detection module, a detection wire, a wire hub and an installation body; the detection module is arranged inside the installation body, and the wire hub is arranged on the outer wall of the installation body;

[0009] The line hub comprises a first line hub, a second line hub and a third line hub; the first line hub and the second line hub are symmetrically arranged on both sides of the third line hub;

[0010] The detection wires include a first detection wire group, a second detection wire group, a third detection wire group and a fourth detection wire group;

[0011] One free end of the first detection line group, the second detection line group and the third detection line group is connected to the fourth detection line group through the first detection line hub, the second detection line hub and the third detection line hub respectively, the free end of the fourth detection line group is located outside the shell, and the other free ends of the first detection line group, the second detection line group and the third detection line group are all connected to the detection module.

[0012] Preferably, the first wiring hub and the second wiring hub both include a support platform slidably disposed on the outer wall of the installation body, and a first fixed block for detection wires located on the support platform; the first detection wire group and the second detection wire group are respectively connected to the first fixed blocks for detection wires on the first wiring hub and the second wiring hub.

[0013] Preferably, a first wire collection hole is provided on the first fixing block of the detection wires, and the first detection wire group and the second detection wire group are plugged into the first wire collection hole.

[0014] Preferably, the first and second cable collection platforms further include a slider, one side of which is slidably arranged with the outer wall of the installation body, and the other side of which is fixedly arranged with the supporting platform.

[0015] Preferably, the third detection wire hub includes a second fixed block for detection wires and a connecting block; the second fixed block for detection wires includes an integral base portion and an extension portion of a U-shaped structure; a free end of the third detection wire group is connected to a side wall of the extension portion of the U-shaped structure.

[0016] Preferably, the first fixing blocks for the detection wires on the first wire collection platform and the second wire collection platform are both arranged close to the U-shaped cavity of the extension part.

[0017] Preferably, a locking structure is further provided on the outside of the housing, and the free end of the fourth detection line group and the locking structure are detachably arranged.

[0018] Preferably, the locking structure comprises an adjusting rod penetrating the housing, a locking head is provided at one free end of the adjusting rod, and an adjusting seat is provided at the other free end; the free end of the fourth detection line group and the locking head are detachably arranged.

[0019] Preferably, a cable tie head is provided at the free end of the fourth detection line group; the cable tie head and the locking head are detachably arranged.

[0020] Preferably, the fourth detection wire group is wrapped with a wire bundle tube on the outside.

[0021] Compared with the prior art, the present invention has the following beneficial technical effects:

[0022] The invention discloses an insulation resistance detection device for electrical equipment in a power plant. Firstly, the device realizes orderly collection of detection wires through a collection seat including a first collection platform, a second collection platform and a third collection platform. The first, second and third collection platforms correspond to different detection wire groups respectively, so that each group of wires can have a special belonging and sorting position, avoiding the situation that the wires are disorderly in traditional detection devices; secondly, each collection platform is designed with an interface connected to a detection module and a fourth detection wire group. This design simplifies the connection process of the wires. Operators can quickly connect each detection wire group to the detection module and an external interface through the collection platform without searching and matching in complex circuits, thereby greatly improving the efficiency and accuracy of the detection work; in addition, orderly wire sorting not only reduces the crossing and entanglement between wires, but also reduces the safety hazards such as short circuit and electric shock caused by the disorder of wires. At the same time, the design of the collection seat makes the wire connection more stable, reduces the possibility of detection failure or equipment damage caused by loose or falling wires, and improves the reliability and safety of detection. In summary, the insulation resistance detection device for power plant electrical equipment not only improves the detection efficiency, but also improves the safety and reliability, providing strong support for the insulation resistance detection work of power plant electrical equipment.

[0023] Furthermore, another inventive point of the present invention is that the first wire hub and the second wire hub both include a supporting platform slidably arranged on the outer wall of the installation body, and a first fixed block for detection wires located on the supporting platform; the first detection wire group and the second detection wire group are respectively connected to the first fixed blocks for detection wires on the first wire hub and the second wire hub. Firstly, through the sliding design of the supporting platform on the outer wall of the installation body, the positions of the first wire hub and the second wire hub can be flexibly adjusted. This design enables the arrangement of the detection wires to be adaptively adjusted according to different detection requirements and on-site environments, thereby improving the detection efficiency. flexibility and efficiency; secondly, the first fixing block of the detection wire on the supporting platform provides a stable fixing point for the detection wire, which not only simplifies the arrangement and connection process of the wires, but also makes the wire management more convenient. The operator can quickly connect the detection wires to the corresponding fixing blocks without worrying about the wires loosening or falling off, thereby improving the efficiency of the detection work; the stable wire fixation and orderly wire arrangement here reduce the safety hazards caused by the confusion of wires. When performing detection work, the operator can see the connection status of the wires more clearly, avoiding the risk of electric shock or short circuit due to accidental touch or wire entanglement.

[0024] Furthermore, another inventive point of the present invention is that a first wire collecting hole is provided on the first fixed block of the detection wire, and the first detection wire group and the second detection wire group are plugged into the first wire collecting hole. First, by setting the first wire collecting hole on the first fixed block of the detection wire, the first detection wire group and the second detection wire group can be neatly plugged into the hole. Such a design enables the wires to be effectively organized and fixed, avoids the disorder and random swing of the wires, and improves the standardization and aesthetics of wire management; secondly, the plug-in connection method simplifies the connection process between the wires and the fixed block. The operator only needs to insert the wires into the corresponding wire collecting hole to achieve the fixation and connection of the wires, without the need to use additional tools or perform complicated operations, thereby improving work efficiency; in addition, the wires plugged into the first wire collecting hole have better stability. Due to the binding effect of the wire collecting hole on the wires, the wires are not easy to loosen or fall off when subjected to external forces, thereby ensuring the reliability and safety of the wire connection.

[0025] Furthermore, another inventive point of the present invention is that the first wire hub and the second wire hub also include a slider, one side of the slider is slidably arranged with the outer wall of the installer body, and the other side is fixedly arranged with the support platform. Here, the slider serves as a connecting component between the support platform and the installer body. Through its sturdy structure and precise sliding design, it effectively enhances the overall stability of the first wire hub and the second wire hub. This stability ensures that the wire hub will not shake or tilt when sliding and adjusting its position, thereby ensuring the reliability and safety of the wire connection; secondly, the design of the slider allows the support platform to easily slide along the outer wall of the installer body, thereby facilitating the operator to adjust the position of the wire hub according to actual needs. This flexibility improves the adaptability and flexibility of the wire layout, making the detection work more efficient and convenient.

[0026] Furthermore, another inventive point of the present invention is that the third detection wire hub includes a second fixed block and a connecting block for detecting wires; the detection wire fixed block includes an integrally arranged base portion and an extension portion of a U-shaped structure; a free end of the third detection wire group is connected to a side wall of the extension portion of the U-shaped structure. Firstly, the second fixed block for detecting wires provides a stable fixing point for the third detection wire group through the integrally arranged base portion and the extension portion of the U-shaped structure. The side wall of the U-shaped structure can effectively prevent the wires from loosening or falling off during use, and also plays a certain protective role on the wires, reducing the risk of wire damage due to external forces.

[0027] Furthermore, another inventive point of the present invention is that the first fixing blocks of the detection wires on the first hub and the second hub are both arranged close to the U-shaped cavity of the extension part. Firstly, by arranging the first fixing blocks of the detection wires close to the U-shaped cavity, the wires on the first hub and the second hub can be closer to the wires on the third hub in physical position, thereby facilitating the centralized management and organization of the wires. This layout helps to reduce the crossing and overlapping of the wires, making the arrangement of the wires clearer and more orderly. Secondly, by arranging the first fixing blocks of the detection wires close to the U-shaped cavity, the mutual interference of the wires during the extension process can be reduced. Since the wires are fixed in a relatively concentrated position, the spatial relationship between them is optimized, avoiding signal interference or physical damage caused by random swinging or crossing of the wires. In addition, this layout design helps to more efficiently utilize the space around the installer body. By fixing the wires in a position close to the U-shaped cavity, the space occupied by the wires can be minimized, providing more space resources for other components or functions. At the same time, by arranging the wire fixing blocks on the first hub and the second hub close to the U-shaped cavity, the entire detection device can be made more compact in structure. This compactness not only improves the stability and reliability of the device, but also helps to reduce the size and weight of the device, making it easier to carry and transport.

[0028] Furthermore, another inventive point of the present invention is that a locking structure is also provided on the outside of the shell, and the free end of the fourth detection wire group is detachably arranged with the locking structure. First, the locking structure allows the fourth detection wire group to be easily removed from the shell when needed, which makes the maintenance, inspection or replacement of the wires more convenient and improves the detection flexibility. The locking structure also facilitates the fixation of the free end of the fourth detection wire group.

[0029] Furthermore, another inventive point of the present invention is that the locking structure includes an adjustment rod that runs through the shell, a locking head is provided at one free end of the adjustment rod, and an adjustment seat is provided at the other free end; the free end of the fourth detection wire group is detachably arranged with the locking head. First, the locking head is detachably connected to the free end of the fourth detection wire group, and the operator can easily connect the wire to the detection device, or quickly remove it when necessary. This design simplifies the installation and removal process of the wire and improves work efficiency; secondly, the design of the adjustment rod allows the operator to adjust the position of the locking head within a certain range. This adjustment capability allows the fourth detection wire group to be stretched, shortened or adjusted in direction according to actual needs to adapt to different detection scenarios and layout requirements; the design of the adjustment rod and the locking head takes into account the optimization of space utilization. Through reasonable layout and compact design, this locking structure can provide effective wire fixing and adjustment functions without increasing the volume of the detection device.

[0030] Furthermore, another inventive point of the present invention is that a cable tie head is provided at the free end of the fourth detection wire group; the cable tie head and the locking head are detachably arranged. Firstly, the design of the cable tie head enables the free end of the fourth detection wire group to be bundled together more neatly, reducing the disorder of the wires. At the same time, through the detachable connection with the locking head, the cable tie head can be firmly fixed on the detection device, avoiding the shaking and falling off of the wires, and improving the stability and safety of the wire connection; secondly, the detachable arrangement of the cable tie head and the locking head simplifies the installation and removal process of the wires. The operator only needs to align and fix the cable tie head with the locking head, without the need for complicated operations or additional tool assistance. This design The design improves work efficiency and reduces the risk of wire damage caused by improper installation; in addition, the detachable connection between the harness head and the locking head makes the wires more flexible in connection and disconnection. The operator can easily connect the wires to the detection device as needed, or quickly disconnect them when needed to adapt to different detection needs and on-site environments; at the same time, the compact design of the harness head and the locking head helps to optimize space utilization. By reducing the space occupied by the wires, this design makes the detection device more compact and efficient, easy to carry and transport, and in addition, the harness head also ensures the durability of the wires for long-term use, helps reduce the risk of wire damage caused by frequent plugging and unplugging, thereby extending the service life of the wires.

[0031] Furthermore, another inventive point of the present invention is that the outside of the fourth detection wire group is wrapped with a wire bundle tube. First, the wire bundle tube provides an additional protective layer for the fourth detection wire group, which can resist physical damage in the external environment, such as wear, cutting or extrusion. This protection extends the service life of the wires and reduces equipment downtime caused by wire damage; secondly, the wire bundle tube neatly wraps the fourth detection wire group, making the wires look neater and more orderly, which helps to reduce crossing and interference between wires and makes the equipment layout clearer. At the same time, the wire bundle tube acts as a shielding layer to reduce electromagnetic interference between wires, which is particularly important for detection systems that need to maintain signal integrity and accuracy, and can ensure the accuracy and reliability of the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 It is a schematic diagram of the overall structure of an insulation resistance detection device for electrical equipment in a power plant in the present invention;

[0034] Figure 2 It is a schematic diagram of the arrangement of a detection mechanism in a device for detecting insulation resistance of electrical equipment in a power plant in the present invention;

[0035] Figure 3 It is a schematic diagram of another perspective of the arrangement of a detection mechanism in a device for detecting insulation resistance of electrical equipment in a power plant in the present invention;

[0036] Figure 4 It is a structural schematic diagram of the detection mechanism in the present invention;

[0037] Figure 5 It is a structural schematic diagram of a wiring hub in the present invention from one viewing angle;

[0038] Figure 6 It is a structural schematic diagram of the wiring hub in the present invention from another perspective;

[0039] Figure 7 It is a schematic diagram of the structure of the first concentrator and the second concentrator in the present invention;

[0040] Figure 8 It is a circuit connection diagram of the detection module in the present invention;

[0041] Fig. 9It is a circuit connection schematic diagram of the insulation resistance measurement circuit in the present invention.

[0042] Wherein: 1. Shell, 11. Partition, 12. Sealing cover, 2. Detection mechanism, 21. Detection module, 211. Isolation resistor, 212. Insulation resistance measurement circuit, 2121. DC high voltage power supply, 2122. Detection circuit, 2123. Voltage divider resistor, 2124. Voltage sampling resistor, 2125. Current sampling resistor, 2126. Insulation resistor, 213. Electrical equipment, 214. Conductor, 215. Ground terminal, 22. Detection wire, 221. First detection wire group, 222. Second detection wire group, 223. The third detection line group, 23, the wire hub, 231, the first wire hub, 232, the second wire hub, 2341, the supporting platform, 2342, the first fixing block for the detection wire, 2343, the slider, 233, the third wire hub, 2331, the second fixing block for the detection wire, 2351, the base part, 2352, the extension part, 2332, the connecting block, 24, the installation body, 3, the heat dissipation mesh cover, 4, the locking structure, 41, the adjusting rod, 42, the locking head, 43, the adjusting seat, 5, the wire head, 6, the wire tube, 7, the base, 8, the balance board. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0046] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0047] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0048] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0050] like Figures 1 to 3 As shown, the present invention discloses an insulation resistance detection device for electrical equipment in a power plant, comprising a housing 1, and a detection mechanism 2 arranged inside the housing 1;

[0051] like Figure 4 As shown, the detection mechanism 2 includes a detection module 21, a detection wire 22, a wire hub 23 and an installer body 24; the detection module 21 is arranged inside the installer body 24, and the wire hub 23 is arranged on the outer wall of the installer body 24.

[0052] like Figures 5 to 7As shown, the wire hub 23 includes a first wire hub 231, a second wire hub 232 and a third wire hub 233; the first wire hub 231 and the second wire hub 232 are symmetrically arranged on both sides of the third wire hub 233; the detection wire 22 includes a first detection wire group 221, a second detection wire group 222, a third detection wire group 223 and a fourth detection wire group; one free end of the first detection wire group 221, the second detection wire group 222 and the third detection wire group 223 are respectively connected to the fourth detection wire group through the first wire hub 231, the second wire hub 232 and the third wire hub 233, the free end of the fourth detection wire group is located on the outside of the shell 1, and the other free ends of the first detection wire group 221, the second detection wire group 222 and the third detection wire group 223 are all connected to the detection module 21.

[0053] The first wire hub 231 and the second wire hub 232 both include a support platform 2341 slidably disposed on the outer wall of the installer body 24, and a first fixed block 2342 for detection wires located on the support platform 2341; the first detection wire group 221 and the second detection wire group 222 are respectively connected to the first fixed block 2342 for detection wires on the first wire hub 231 and the second wire hub 232.

[0054] The first detection wire fixing block 2342 is provided with a first wire collecting hole, and the first detection wire group 221 and the second detection wire group 222 are plugged into the first wire collecting hole.

[0055] The first cable collection platform 231 and the second cable collection platform 232 further include a slider 2343 , one side of which is slidably disposed with the outer wall of the installer body 24 , and the other side of which is fixedly disposed with the supporting platform 2341 .

[0056] like Figure 6 As shown, the third detection wire hub 233 includes a second detection wire fixing block 2331 and a connecting block 2332; the second detection wire fixing block 2331 includes an integrally arranged base portion 2351 and an extension portion 2352 of a U-shaped structure; a free end of the third detection wire group 223 is connected to a side wall of the U-shaped structure extension portion 2352.

[0057] The first detection wire fixing blocks 2342 on the first wire collection platform 231 and the second wire collection platform 232 are both disposed close to the U-shaped cavity of the extension portion 2352 .

[0058] like Figures 1-2As shown, the housing 1 is further provided with a locking structure 4 on the outside, and the free end of the fourth detection line group is detachably arranged with the locking structure 4. The locking structure 4 includes an adjustment rod 41 that passes through the housing 1, and one free end of the adjustment rod 41 is provided with a locking head 42, and the other free end is provided with an adjustment seat 43; the free end of the fourth detection line group is detachably arranged with the locking head 42.

[0059] In a more preferred embodiment, the free end of the fourth detection line group is provided with a cable head 5; the cable head 5 and the locking head 42 are detachably arranged; the outside of the fourth detection line group is wrapped with a cable tube 6. The cable head 5 and the cable tube 6 are detachably connected.

[0060] In a more specific embodiment, the locking structure 4 includes an adjusting rod 41, a locking head 42, and an adjusting seat 43 fixed on the outer wall of the housing 1. The housing 1 is provided with a through hole, the adjusting rod 41 is movably inserted in the through hole, the locking head 42 is sleeved on one end of the adjusting rod 41, and the other end of the adjusting rod 41 passes through the through hole and is threadedly connected to the adjusting seat 43. Here, by providing the adjusting rod 41, the threaded connection of the adjusting rod 41 on the adjusting seat 43 can realize the reciprocating movement of the locking head 42 on the adjusting rod 41, thereby adjusting the gap between the locking head 42 and the outer wall of the housing 1, which is convenient for the placement and disassembly of the cable tie head 5.

[0061] In a more preferred embodiment, a gap is formed between the locking head 42 and the outer wall of the housing 1, and the cable head 5 is sleeved in the gap. A slot is provided at one end of the cable head 5, and a buckle matching the slot is provided on the cable tube 6. The outer surface of the cable head 5 and the outer surface of the cable tube 6 are both wrapped with insulating material. Here, the slot and the buckle are provided, and the two cooperate to fix the cable tube 6, prevent the cable tube 6 from swinging around and causing wear or even damage, and avoid direct contact between the cable tube 6 and people when not in operation, thereby reducing safety risks. Preferably, the insulating material is silicone rubber.

[0062] The present invention realizes the disassembly and assembly of the wiring harness head 5 by providing a locking structure 4, improves space utilization, and facilitates the placement and storage of the detection device. By providing the wiring harness head 5 and the wiring harness tube 6, it is avoided that the operator directly contacts the conductive elements and the conductive wires, thereby improving the problem of low operating safety performance of the traditional power plant insulation detection device.

[0063] In addition, in a more preferred solution, the outer wall of the shell 1 is provided with a heat dissipation mesh cover 3, a heat dissipation rib is installed in the heat dissipation mesh cover 3, and the heat dissipation rib is arranged in an inclined shape, and a partition 11 is provided in the shell 1, and a through hole is provided on the partition 11; the partition 11 divides the inner cavity of the shell 1 into an installation chamber and a heat dissipation chamber, the detection mechanism 2 is arranged in the installation chamber, and the heat dissipation mesh cover 3 is arranged on one side of the heat dissipation chamber. In a more preferred embodiment, the through hole occupies 70% to 85% of the area of ​​the partition 11. The heat dissipation chamber is formed between the partition 11 and the heat dissipation rib. The present invention realizes heat dissipation and cooling inside the shell 1 by providing a heat dissipation mesh cover 3, avoids damage to components in the shell 1 due to overheating, and can extend the service life of the components in the shell 1; by providing a heat dissipation chamber, the shell 1 dissipates heat through the gap between the partition 11 and the heat dissipation rib, and during the heat dissipation process, due to the chimney effect formed in the heat dissipation chamber, the convection is intensified, and the heat dissipation effect is significantly improved.

[0064] At the same time, more preferably, Figure 1 As shown, the housing 1 is provided with sealing covers 12 on two opposite side walls, and the two sealing covers 12 and the heat dissipation mesh cover 3 are respectively located on different outer walls of the housing 1. Here, by providing the sealing covers 12, a closed space is formed in the housing 1, which greatly reduces the entry of external dust and moisture in the air into the housing 1, and enhances the sealing effect.

[0065] The bottom of the housing 1 is also provided with a base 7, and a balance plate 8 is also provided at the free end of the base 7. Specifically, the base 7 is installed at the bottom of the housing 1, and a threaded hole is provided on the connection surface between the base 7 and the housing 1, and a bolt is inserted into the threaded hole. The two sides of the base 7 are respectively connected with the balance plates 8, and the balance plates 8 on both sides are integrally formed with the base 7. Here, by providing the balance plate 8, the housing 1 can be supported and protected, and at the same time, it can play a certain shock-absorbing role when the support shakes.

[0066] The present invention is provided with a wire collection seat 23, which can effectively organize the detection wires 22 in the detection mechanism 2. When the inside of the housing 1 needs to be repaired, there is no need to organize the detection wires 22, and the internal circuit situation is clearer.

[0067] like Figure 8As shown, in one embodiment, the detection module 21 includes an isolation resistor 211 and an insulation resistance measurement circuit 212, the high voltage end of the insulation resistance measurement circuit 212 is connected to one end of the isolation resistor 211, the other end of the isolation resistor 211 is connected to any one of the conductors 214 that are electrically connected to the electrical device 213 through the detection wire 22, the low voltage end of the insulation resistance measurement circuit 212 is connected to the ground terminal 215, and the detection module 21 applies a DC voltage between the conductor 214 and the ground terminal 215 to measure the insulation resistance value between the electrical device 213 that is electrically connected to the conductor 214 and the ground terminal 215. When using the detection device of the present invention, the bundle head 5 is removed and connected to any one of the conductors 214 that are electrically connected to the electrical device 213 for testing.

[0068] like Fig. 9 As shown, in one embodiment, the insulation resistance measurement circuit 212 includes a DC high voltage power supply 2121, a detection circuit 2122, a voltage divider resistor 2123, a voltage sampling resistor 2124 and a current sampling resistor 2125, the high voltage end of the DC high voltage power supply 2121 is connected to one end of the isolation resistor 211 and one end of the voltage divider resistor 2123, the other end of the voltage divider resistor 2123 is connected to one end of the voltage sampling resistor 2124, and the other end of the voltage sampling resistor 2124 is connected to the low voltage end of the DC high voltage power supply 2121; both ends of the voltage sampling resistor 2124 are connected to the voltage sampling port of the detection circuit 2122; one end of the current sampling resistor 2125 is connected to the low voltage end of the DC high voltage power supply 2121, and the other end of the current sampling resistor 2125 is connected to the ground terminal 215; both ends of the current sampling resistor 2125 are connected to the current sampling port of the detection circuit 2122.

[0069] like Fig. 9 As shown, in one embodiment, the detection circuit 2122 detects the voltage of the voltage sampling resistor 2124 to obtain the output voltage value u of the DC high-voltage power supply 2121; the detection circuit 2122 detects the voltage of the current sampling resistor 2125 to obtain the current value i flowing from the high-voltage end of the DC high-voltage power supply 2121 through the isolation resistor 211, the insulation resistor 2126 and the current sampling resistor 2125 and returning to the low-voltage end of the DC high-voltage power supply 2121. The insulation resistance detection circuit 2122 obtains the total insulation resistance value R through the voltage value u and the current value i. 总 =u / i, from the total insulation resistance R 总 Subtract the resistance value r of the isolation resistor 211 from the resistance value r of the insulation resistor 2126 to obtain the resistance value R of the insulation resistor 2126, that is, R = R 总 -r.

[0070] In the above detection module 21, the detection circuit 2122 measures the voltage u of the DC high voltage power supply 2121 through the voltage divider resistor 2123 and the voltage sampling resistor 2124, and measures the leakage current i flowing between the conductor 214 and the ground terminal 215 under the action of the voltage u through the current sampling resistor 2125. The insulation resistance measurement circuit 212 can obtain the total insulation resistance value R through the values ​​of the voltage u and the leakage current i. 总 ; Subtract the resistance value r of the isolation resistor 211 from the total insulation resistance Rtotal to obtain the resistance value R of the insulation resistor 2126 of the electrical device 213, that is, R = R 总 The resistance of the current sampling resistor 2125 is relatively small, and the resistance of the current sampling resistor 2125 is neglected in the above formula.

[0071] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. 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 device for detecting insulation resistance of electrical equipment in a power plant, characterized in that: The invention comprises a shell (1), and a detection mechanism (2) arranged inside the shell (1); the detection mechanism (2) comprises a detection module (21), a detection wire (22), a wire hub (23) and an installation body (24); the detection module (21) is arranged inside the installation body (24), and the wire hub (23) is arranged on the outer wall of the installation body (24); The line hub (23) comprises a first line hub (231), a second line hub (232) and a third line hub (233); the first line hub (231) and the second line hub (232) are symmetrically arranged on both sides of the third line hub (233); The detection wires (22) include a first detection wire group (221), a second detection wire group (222), a third detection wire group (223) and a fourth detection wire group; One free end of the first detection line group (221), the second detection line group (222) and the third detection line group (223) is connected to the fourth detection line group through the first detection line hub (231), the second detection line hub (232) and the third detection line hub (233) respectively; the free end of the fourth detection line group is located outside the shell (1); the other free ends of the first detection line group (221), the second detection line group (222) and the third detection line group (223) are all connected to the detection module (21).

2. The device for detecting insulation resistance of electrical equipment in a power plant according to claim 1, characterized in that: The first wire hub (231) and the second wire hub (232) both comprise a support platform (2341) slidably arranged on the outer wall of the installer body (24), and a first fixed block (2342) for detecting wires located on the support platform (2341); the first detection wire group (221) and the second detection wire group (222) are respectively connected to the first fixed block (2342) for detecting wires on the first wire hub (231) and the second wire hub (232).

3. The device for detecting insulation resistance of electrical equipment in a power plant according to claim 2, characterized in that: The first detection wire fixing block (2342) is provided with a first wire collection hole, and the first detection wire group (221) and the second detection wire group (222) are plugged into the first wire collection hole.

4. The device for detecting insulation resistance of electrical equipment in a power plant according to claim 2, characterized in that: The first wiring hub (231) and the second wiring hub (232) further include a slider (2343), one side of which is slidably arranged with the outer wall of the installer body (24), and the other side of which is fixedly arranged with the supporting platform (2341).

5. The device for detecting insulation resistance of electrical equipment in a power plant according to claim 2, characterized in that: The third detection wire collection platform (233) comprises a second detection wire fixing block (2331) and a connection block (2332); the second detection wire fixing block (2331) comprises an integrally arranged base portion (2351) and a U-shaped structure extension portion (2352); a free end of the third detection wire group (223) is connected to a side wall of the U-shaped structure extension portion (2352).

6. The device for detecting insulation resistance of electrical equipment in a power plant according to claim 5, characterized in that: The first detection wire fixing blocks (2342) on the first wire collection platform (231) and the second wire collection platform (232) are both arranged close to the U-shaped cavity of the extension portion (2352).

7. The device for detecting insulation resistance of electrical equipment in a power plant according to claim 1, characterized in that: A locking structure (4) is also provided on the outside of the housing (1), and the free end of the fourth detection line group and the locking structure (4) are detachably arranged.

8. The device for detecting insulation resistance of electrical equipment in a power plant according to claim 7, characterized in that: The locking structure (4) comprises an adjusting rod (41) penetrating the shell (1); a locking head (42) is provided at one free end of the adjusting rod (41), and an adjusting seat (43) is provided at the other free end; the free end of the fourth detection line group and the locking head (42) are detachably arranged.

9. The device for detecting insulation resistance of electrical equipment in a power plant according to claim 7, characterized in that: A cable tie head (5) is provided at the free end of the fourth detection line group; the cable tie head (5) and the locking head (42) are detachably arranged.

10. The device for detecting insulation resistance of electrical equipment in a power plant according to claim 1, characterized in that: The outside of the fourth detection wire group is wrapped with a wire bundle tube (6).

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