A temperature field equalization control device for busbars of a power distribution cabinet and a heat dissipation method thereof

Abstract

The application relates to a switch device for power distribution, in particular to a power distribution cabinet heat dissipation device technical field, and discloses a power distribution cabinet busbar temperature field balanced regulation and control device, which comprises a cabinet body, a power distribution part is arranged in the cabinet body, the power distribution part comprises a power distribution busbar, a compensation part is arranged on the power distribution busbar, the compensation part comprises a compensation block, the compensation block is in a U-shaped structure, the U-shaped end part of the compensation block is in a two-ear end structure, buffer holes are arranged on the two ear ends of the compensation block, buffer blocks are hingedly connected in the two buffer holes, a rotating rod is fixedly connected between the hinge joints of the two buffer blocks, buffer arms are fixedly connected to the two buffer blocks, the compensation part, a supporting part and a detection part are cooperated to realize full-time monitoring and dynamic buffering of thermal expansion and cold contraction of the busbar, bending and cracking caused by thermal stress are avoided, looseness is accurately verified by a displacement sensor, traditional manual inspection is replaced, and the risk of missing the best maintenance opportunity is eliminated.

Description

TECHNICAL FIELD

[0001] The application relates to a switch device for power distribution, in particular to a busbar temperature field balanced regulation and control device for a power distribution cabinet and a heat dissipation method thereof. BACKGROUND

[0002] In an industrial production scene, as the core equipment of power distribution and control, the busbar in the power distribution cabinet bears the key functions of power collection, transmission and distribution, and directly determines the stability and safety of the industrial power supply system. However, the particularity of the industrial environment makes the busbar in a high-risk operation state for a long time, various hidden troubles occur frequently, and the existing maintenance mode is difficult to effectively cope with, which has become the core pain point restricting the reliability of industrial power supply.

[0003] From the influence of the industrial environment on the busbar, the sustained vibration generated by the operation of large motors, compressors and other equipment in the industrial workshop will be directly transmitted to the power distribution cabinet, causing the busbar fixing bolts to gradually loosen. The loosening of the bolts will further enlarge the contact gap, causing the contact resistance to rise exponentially. The current industry generally adopts a monthly or quarterly periodic inspection mode for the maintenance of the busbar, which detects and checks the busbar by artificial detection. However, the fixed inspection cycle cannot match the suddenness of hidden troubles, and it is easy to miss the best maintenance opportunity, further aggravating the safety risk.

[0004] In addition, the industrial environment has large day and night temperature differences, significant seasonal temperature and circuit heating fluctuations, and the busbar will periodically expand and contract due to thermal expansion and contraction characteristics. If sufficient expansion allowance is not reserved or a buffer structure is not set during installation, thermal stress will cause the busbar to bend, deform, and even cause the joint to crack, damaging the power transmission path. Therefore, a busbar temperature field balanced regulation and control device for a power distribution cabinet and a heat dissipation method thereof are proposed to solve the above problems. SUMMARY

[0005] (I) Technical problems solved

[0006] In view of the deficiencies of the prior art, the application provides a busbar temperature field balanced regulation and control device for a power distribution cabinet and a heat dissipation method thereof, which solves the problems of dust coverage, vibration loosening, thermal expansion and contraction of the busbar in the power distribution cabinet under the industrial environment, which have the characteristics of suddenness, concealment and gradualness, and the problem that the periodic inspection mode cannot realize real-time control and timely response.

[0007] (II) Technical solutions

[0008] In order to achieve the above object, the present application provides the following technical scheme: a power distribution cabinet busbar temperature field equalization regulation and control device, comprising a cabinet body, a power distribution part is arranged in the cabinet body, the power distribution part comprises a power distribution busbar, a compensation part is arranged on the power distribution busbar, the compensation part comprises a compensation block, the compensation block is a U-shaped structure, the U-shaped end of the compensation block is a two-ear end structure, a buffer hole is formed in the two ears of the compensation block, a buffer block is hingedly connected in the two buffer holes, a rotating rod is fixedly connected between the hinge points of the two buffer blocks, a buffer arm is fixedly connected to the two buffer blocks, an angle sensor two is installed on the rotating rod, a torsional spring is elastically connected between each buffer block and the inner wall of the connected buffer hole, the buffer arm is an L-shaped structure, and the end of the buffer arm is a wedge surface structure.

[0009] Preferably, the power distribution part further comprises a grounding hole one, the grounding hole one is formed on the power distribution busbar, the two ends of the power distribution busbar are provided with insulating parts, and the two ends of the power distribution busbar are provided with supporting legs through the insulating parts.

[0010] Preferably, the number of compensation parts is two, the two compensation parts are symmetrically arranged, the compensation blocks in the two compensation parts are respectively in abutment with the two ends of the power distribution busbar, and the two insulating parts pass through the ears of the compensation blocks on the same side.

[0011] Preferably, the cabinet body is provided with a positioning part, the positioning part comprises a mounting plate, a machine box is mounted in the middle of the mounting plate, a microprocessor is arranged in the machine box, a displacement sensor is mounted on the machine box, the displacement sensor is electrically connected with the microprocessor, the sensing end of the displacement sensor faces the midpoint of the power distribution busbar, and a grounding hole two is formed in the mounting plate.

[0012] Preferably, the positioning part is provided with a supporting part, the supporting part comprises a column sleeve, an adjusting column is slidably connected to the inner wall of the column sleeve, a damping spring is elastically connected between the adjusting column and the column sleeve, wedge blocks are connected to the two sides of the column sleeve, slide rods are fixedly connected to the two sides of the adjusting column, a supporting column is arranged on the adjusting column, a reset spring is elastically connected between the supporting column and the adjusting column, slide grooves corresponding to the slide rods are formed in the two sides of the supporting column, and a hinge block is mounted on one side of the supporting column.

[0013] Preferably, the number of supporting parts is two, the two supporting parts are symmetrically arranged, the wedge blocks in the two supporting parts are respectively in abutment with the wedge surfaces of the buffer arms on the same side, the supporting columns in the two supporting parts are respectively in abutment with the two ends of the power distribution busbar, and the two column sleeves are mounted on the two ends of the mounting plate.

[0014] Preferably, the support part is provided with a detection part, the detection part comprises a support plate fixedly connected to the mounting plate, the end of the support plate is hingedly connected with a first support arm, the hinge point of the first support arm is provided with a first angle sensor, one side of the first support arm is provided with a second support arm, the second support arm is fixedly connected with a limiting rod, the second support arm is slidably connected to the first support arm through the limiting rod, and the first angle sensor and the second angle sensor are electrically connected with the microprocessor.

[0015] Preferably, the number of detection parts is two, and the two detection parts are symmetrically arranged.

[0016] Preferably, the mounting plate is symmetrically provided with two anti-interference covers, and the two detection parts are located in the two anti-interference covers respectively.

[0017] A heat dissipation method of a power distribution cabinet busbar temperature field balanced regulation and control device, according to the power distribution cabinet busbar temperature field balanced regulation and control device, comprising the following steps:

[0018] Step one: the power distribution busbar expands and extends at both ends under the effect of thermal expansion, and pushes the displacement of the compensation block on both sides, the compensation block pulls the buffer arm, the buffer arm is displaced along the inclined surface of the wedge block, and the angular displacement of the rotating rod is detected in real time by the second angle sensor, and the signal is received by the microprocessor and is synchronously given to the power distribution cabinet control system for thermal stress monitoring;

[0019] Step two: the power distribution busbar continues to expand horizontally under the effect of thermal expansion, and abuts against the buffer hole after the angular displacement of the buffer block, at this time the angle of the buffer block is fixed, and when the compensation block continues to move, the buffer arm will press down the wedge block, so as to make the adjusting column descend, and further provide a buffer space for the thermal expansion deformation of the power distribution busbar;

[0020] Step three: in the longitudinal thermal expansion of the power distribution busbar, the end part thereof will press down the supporting column, the reset spring always provides elastic support force, so as to make the supporting column support the power distribution busbar in real time, avoid the increase of the mounting gap of the busbar to cause shaking, and the descent of the supporting column will pull the second support arm through the hinge block, so that the second support arm slides on the first support arm through the limiting rod, and the first support arm generates angular displacement, the angular displacement is detected in real time by the first angle sensor, and the signal is received by the microprocessor and is synchronously given to the power distribution cabinet control system for thermal stress monitoring;

[0021] Step three: when the first angle sensor generates angular displacement, the control system will synchronously adjust the water-cooling refrigeration system of the power distribution cabinet, so that the water-cooling plate adopts higher power to cool the inside of the cabinet body and cool the power distribution busbar in real time;

[0022] Step four: the power distribution busbar is contracted and deformed under the cold shrinkage effect, at this time, the angle sensor one and the angle sensor two will produce reverse angular displacement, when the reverse angular displacement is zero, it indicates that the deformation of the power distribution busbar is reset, when the reverse angular displacement exceeds the threshold, it indicates that the power distribution busbar is loose, the displacement sensor is used to detect the distance from the power distribution busbar to the sensing end in real time, and the power distribution cabinet control system is synchronously monitored to realize real-time monitoring of the installation stability of the power distribution busbar.

[0023] (Three) beneficial effects

[0024] Compared with the prior art, the power distribution cabinet busbar temperature field balanced regulation device and the heat dissipation method thereof have the following beneficial effects:

[0025] 1. The power distribution cabinet busbar temperature field balanced regulation device adopts the cooperation of the compensation part, the supporting part and the detection part to realize full-time monitoring and dynamic buffering of the thermal expansion and cold contraction of the busbar, avoid bending and cracking caused by thermal stress, and accurately verify the looseness of the displacement sensor, thereby replacing the traditional manual inspection and eliminating the risk of missing the best maintenance opportunity.

[0026] 2. The power distribution cabinet busbar temperature field balanced regulation device uses an anti-interference cover to isolate the influence of the electromagnetic field on the sensor, and the grounding hole ensures reliable grounding of the system to avoid ground current interference. The angle sensor one and the angle sensor two monitor the longitudinal and transverse deformation of the busbar respectively, and the displacement sensor assists in verifying the looseness. Multiple dimensional data are mutually complementary to ensure the accuracy of the signals received by the microprocessor and reduce misjudgment.

[0027] 3. The power distribution cabinet busbar temperature field balanced regulation device uses the angle sensor one of the detection part to trigger heat dissipation adjustment only when the busbar longitudinally expands, improves the power of the water-cooled plate, accurately targets heat dissipation of the heat source, effectively improves the uneven temperature field of the busbar, and reduces the risk of insulation aging caused by local overheating.

[0028] 4. The power distribution cabinet busbar temperature field balanced regulation device uses the damping spring of the supporting part to absorb industrial vibration and reduce the probability of busbar bolt loosening. The buffer structure of the compensation part and the supporting part provides bidirectional protection for the busbar, adapts to the day-night temperature difference and circuit heating fluctuation, and accurately positions each component through the mounting plate, thereby having strong synergy, avoiding functional failure caused by component misalignment, and prolonging the overall service life of the device.

[0029] 5. The power distribution cabinet busbar temperature field balanced regulation device uses an insulating piece to isolate the busbar and the supporting leg, and the grounding hole realizes reliable grounding to avoid electric shock or electric shock accidents. When the busbar is loose, the displacement sensor and the angle sensor are linked to trigger an alarm, reminding the operation and maintenance personnel to handle it in time, preventing the increase of contact resistance, arc discharge and other safety hazards caused by looseness, and ensuring the stability of the industrial power supply system. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 A power distribution cabinet busbar temperature field balanced regulation and control device cabinet internal structure diagram is proposed for the application;

[0031] Figure 2 A power distribution busbar structure schematic diagram is proposed for the application;

[0032] Figure 3 A power distribution part and positioning part structure schematic diagram is proposed for the application;

[0033] Figure 4 A support part and detection part connection diagram is proposed for the application;

[0034] Figure 5 A support part and detection part exploded view is proposed for the application;

[0035] Figure 6 A compensation part structure schematic diagram is proposed for the application;

[0036] Figure 7 A whole structure schematic diagram is proposed for the application.

[0037] In the figure: 1, cabinet; 2, power distribution part; 21, power distribution busbar; 22, grounding hole one; 23, insulating part; 24, foot; 3, positioning part; 31, mounting plate; 32, case; 33, displacement sensor; 34, grounding hole two; 4, support part; 41, column sleeve; 42, adjusting column; 43, damping spring; 44, wedge block; 45, sliding rod; 46, support column; 47, reset spring; 48, sliding groove; 49, hinged block; 5, detection part; 51, support plate; 52, support arm one; 53, angle sensor one; 54, support arm two; 55, limit rod; 6, compensation part; 61, compensation block; 62, buffer hole; 63, buffer block; 64, rotating rod; 65, buffer arm; 66, angle sensor two; 7, anti-interference cover; 8, water-cooled plate; 9, cabinet door. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0039] Please refer to Figures 1-7The application provides a power distribution cabinet busbar temperature field equalization regulation and control device, which comprises a cabinet body 1, a power distribution part 2 is arranged in the cabinet body 1, and the power distribution part 2 is a core conductive carrier for realizing the collection, distribution and transmission of industrial electric energy through a power distribution busbar 21. The power distribution part 2 comprises the power distribution busbar 21, a compensation part 6 is arranged on the power distribution busbar 21, thermal stress is easily generated due to thermal expansion and cold contraction of the busbar, and an expansion allowance needs to be reserved to provide an initial buffer space for the busbar, so that the busbar is prevented from being directly extruded and deformed. The compensation part 6 comprises a compensation block 61, the compensation block 61 is a transverse expansion space for the busbar, the compensation block 61 is in a U-shaped structure, the U-shaped end portion of the compensation block 61 is in a two-ear structure, a buffer hole 62 is formed in each of the two ears of the compensation block 61, a buffer block 63 is hingedly connected in each of the two buffer holes 62, a rotating rod 64 is fixedly connected between the hinge joints of the two buffer blocks 63, a buffer arm 65 is fixedly connected to each of the two buffer blocks 63, an angle sensor two 66 is installed on the rotating rod 64, a torsional spring is elastically connected between each buffer block 63 and the inner wall of the buffer hole 62 connected with the buffer block 63, the buffer arm 65 is in an L-shaped structure, the end portion of the buffer arm 65 is in a wedge surface structure, the number of the compensation part 6 is two, the two compensation parts 6 are symmetrically arranged relative to each other, the compensation block 61 in each of the two compensation parts 6 abuts against the two ends of the power distribution busbar 21, and two insulation pieces 23 pass through the ears of the compensation block 61 on the same side.

[0040] In the embodiment, the power distribution part 2 further comprises a grounding hole one 22, the grounding hole one 22 ensures reliable system grounding, the grounding hole one 22 is formed in the power distribution busbar 21, the two ends of the power distribution busbar 21 are provided with the insulation pieces 23, the two ends of the power distribution busbar 21 are provided with the feet 24 through the insulation pieces 23, a positioning part 3 is arranged in the cabinet body 1, each component is fixedly supported, the position of each component is accurate, and each component cooperates with each other, the positioning part 3 comprises a mounting plate 31, a machine box 32 is mounted in the middle portion of the mounting plate 31, a microprocessor is arranged in the machine box 32, a displacement sensor 33 is mounted on the machine box 32, the displacement sensor 33 is electrically connected with the microprocessor, the sensing end of the displacement sensor 33 faces the midpoint of the power distribution busbar 21, a grounding hole two 34 is formed in the mounting plate 31, and the grounding hole two 34 avoids the interference of electric leakage or ground loop current on the monitoring precision of the sensor.

[0041] Notably, the positioning part 3 is provided with a support part 4, which provides a buffer space for the longitudinal deformation of the busbar, absorbs the continuous vibration of the industrial environment, and the support part 4 comprises a column sleeve 41, the inner wall of the column sleeve 41 is slidably connected with an adjusting column 42, the adjusting column 42 and the column sleeve 41 are elastically connected with a damping spring 43, the damping spring 43 not only provides a buffer when the busbar expands, but also absorbs the continuous vibration of the industrial workshop motor and compressor transmitted to the cabinet body 1, the two sides of the column sleeve 41 are connected with wedge blocks 44, the two sides of the adjusting column 42 are fixedly connected with slide rods 45, the adjusting column 42 is provided with a support column 46, the support column 46 provides space for the longitudinal expansion of the busbar, the support column 46 and the adjusting column 42 are elastically connected with a return spring 47, the two sides of the support column 46 are provided with sliding grooves 48 corresponding to the slide rods 45, one side of the support column 46 is provided with a hinged block 49, the number of the support part 4 is two, and the two support parts 4 are symmetrically arranged, the wedge blocks 44 in the two support parts 4 are respectively in abutment with the wedge surfaces of the same side buffer arms 65, the support columns 46 in the two support parts 4 are respectively in abutment with the two ends of the busbar 21, and the two column sleeves 41 are installed at the two ends of the mounting plate 31.

[0042] Notably, the support part 4 is provided with a detection part 5, an angular displacement signal triggers a control system to carry out temperature linkage regulation in the cabinet to avoid overheating of the busbar, the detection part 5 comprises a support plate 51, the support plate 51 is fixedly connected to the mounting plate 31, the end of the support plate 51 is hingedly connected with a first support arm 52, an angle sensor 53 is installed on the hinge point of the first support arm 52, a second support arm 54 is arranged on one side of the first support arm 52, a limiting rod 55 is fixedly connected to the second support arm 54, the second support arm 54 is slidably connected to the first support arm 52 through the limiting rod 55, the angle sensor 53 and an angle sensor 66 are electrically connected to a microprocessor, the number of the detection part 5 is two, and the two detection parts 5 are symmetrically arranged, the cabinet 32 is located between the support plates 51 of the two detection parts 5, the second support arms 54 in the two detection parts 5 are respectively hingedly connected with the same side hinged blocks 49, two anti-interference covers 7 are symmetrically installed on the mounting plate 31, the two detection parts 5 are located in the two anti-interference covers 7, the anti-interference cover 7 isolates the influence of the strong electromagnetic field of the busbar on the sensor, and the cabinet body 1 is provided with a water cooling plate 8 corresponding to the busbar 21, and the cabinet body 1 is provided with a cabinet door 9.

[0043] A heat dissipation method of a busbar temperature field balanced regulation and control device of a power distribution cabinet, according to the above-mentioned busbar temperature field balanced regulation and control device of the power distribution cabinet, comprising the following steps:

[0044] Step one: the power distribution busbar 21 expands and extends at both ends under the effect of thermal expansion, and pushes the displacement of the compensation block 61 on both sides, the compensation block 61 pulls the buffer arm 65, the buffer arm 65 is displaced along the inclined surface of the wedge block 44, and the angular displacement of the rotating rod 64 is detected in real time through the angle sensor two 66, and the microprocessor receives the signal and synchronously gives the power distribution cabinet control system for thermal stress monitoring;

[0045] Step two: the power distribution busbar 21 continues to expand horizontally under the effect of thermal expansion, and will abut the buffer hole 62 after the angular displacement of the buffer block 63, at this time the angular displacement of the buffer block 63 is fixed, and the compensation block 61 continues to move and will press down the wedge block 44 through the buffer arm 65, so as to make the adjusting column 42 descend, and further provide a buffer space for the thermal expansion deformation of the power distribution busbar 21;

[0046] Step three: in the longitudinal thermal expansion of the power distribution busbar 21, the end part will press down the supporting column 46, the reset spring 47 always provides elastic support force to make the supporting column 46 support the power distribution busbar 21 in real time, avoid the increase of the busbar mounting gap to cause shaking, and the descending of the supporting column 46 will pull the second supporting arm 54 through the hinge block 49, make the second supporting arm 54 slide on the first supporting arm 52 through the limiting rod 55, and make the first supporting arm 52 produce angular displacement, the angular displacement amount is detected in real time by the angle sensor one 53, and the microprocessor receives the signal and synchronously gives the power distribution cabinet control system for thermal stress monitoring;

[0047] Step three: when the angle sensor one 53 produces angular displacement, the control system will synchronously adjust the water-cooled refrigeration system of the power distribution cabinet, so that the water-cooled plate 8 adopts higher power to cool the inside of the cabinet body 1 and cool the power distribution busbar 21 in real time;

[0048] Step four: the power distribution busbar 21 shrinks and recovers under the effect of cold shrinkage, at this time the angle sensor one 53 and the angle sensor two 66 will produce reverse angular displacement, when the reverse angular displacement is zero, it means that the power distribution busbar 21 is reset, when the reverse angular displacement exceeds the threshold, it means that the power distribution busbar 21 is loose, the displacement sensor 33 detects the distance from the power distribution busbar 21 to the sensing end in real time, and synchronously gives the power distribution cabinet control system for real-time monitoring of the installation stability of the power distribution busbar 21.

[0049] When the power distribution busbar 21 expands and deforms due to heat generated by the circuit or environmental temperature rise, it expands and extends along the transverse length, directly pushing the symmetrically arranged compensation blocks 61 to displace to both sides, driving the buffer blocks 63 in the ear end buffer holes 62 to rotate around the hinge points, and the two buffer blocks 63 rotate synchronously through the rotating rod 64 to form an angular displacement. The angular displacement sensor two 66 on the rotating rod 64 detects the angular displacement in real time and transmits the data to the microprocessor. The microprocessor deduces the transverse thermal expansion degree of the busbar through a preset algorithm and a thermal expansion amount calibration formula, and synchronously sends the thermal stress data to the power distribution cabinet control system to realize real-time monitoring of the thermal expansion state.

[0050] If the busbar continues to expand transversely, the buffer block 63 rotates to the limit when it abuts against the inner wall of the buffer hole 62 and no longer rotates excessively. When the compensation block 61 continues to be pushed by the busbar, the buffer arm 65 connected to the compensation block 61 is in contact with the wedge block 44 through the wedge surface, and displaces with the compensation block 61. The buffer arm 65 slides down along the inclined surface of the wedge block 44 and generates downward pressure. After the wedge block 44 is pressed, the adjusting column 42 is driven to slide downward to overcome the elastic force of the damping spring 43, thereby providing additional buffer space for the transverse expansion of the busbar, avoiding excessive thermal stress caused by the thermal expansion of the busbar, and preventing the busbar from bending or joint cracking.

[0051] In addition to transverse expansion, the busbar will also expand slightly in the longitudinal thickness due to temperature rise, and the end portion will press the support column 46 downward. After the support column 46 is pressed, it slides downward along the sliding rod 45 of the adjusting column 42, while compressing the reset spring 47. The reset spring 47 always provides an upward elastic support force to avoid the installation gap of the busbar increasing due to longitudinal expansion, thereby causing vibration and loosening. When the support column 46 slides downward, the hinge block 49 on the side surface pulls the second support arm 54, causing the second support arm 54 to slide on the first support arm 52 through the limiting rod 55, thereby driving the first support arm 52 to rotate around the hinge point with the support plate 51 to generate an angular displacement. The angular displacement sensor one 53 captures the angular displacement in real time and transmits the data to the microprocessor. The microprocessor deduces the longitudinal thermal expansion degree of the busbar in combination with the angular displacement, and synchronously sends the data to the control system again to realize full-dimensional thermal stress monitoring of the busbar.

[0052] When the angular displacement sensor one 53 detects the angular displacement, the control system determines that the busbar is in a high heat state and needs to be strengthened for heat dissipation. The control system sends an instruction to the water-cooled plate 8 refrigeration system to increase the refrigeration power of the water-cooled plate 8. The water-cooled plate 8 is arranged corresponding to the power distribution busbar 21, and the busbar heat is efficiently conducted to the cooling liquid through the existing aluminum nitride ceramic sheet insulation heat conduction layer, and then released through the external heat dissipation fins of the cabinet body 1 to realize real-time cooling of the busbar temperature and avoid uneven temperature field or local overheating.

[0053] When the power distribution busbar 21 is cold contracted due to reduced circuit load or environmental cooling, the busbar temperature decreases and synchronously contracts in the transverse and longitudinal directions, the pushing force on the compensation block 61 and the support column 46 disappears, the buffer block 63 is reversely rotated under the elastic restoring force of the torsional spring and drives the compensation block 61 to reset towards the busbar, the rotating rod 64 is reversely rotated synchronously, the angle sensor two 66 detects the reverse angular displacement, the support column 46 slides upward under the elastic restoring force of the reset spring 47, pulls the support arm two 54 to reversely move, the support arm one 52 is reversely rotated synchronously, and the angle sensor one 53 detects the reverse angular displacement.

[0054] If the reverse angular displacements of the angle sensor one 53 and the angle sensor two 66 gradually return to zero, it indicates that the busbar is completely restored to the initial state after cold contraction, each component is reset synchronously, and the busbar installation state is normal. If the reverse angular displacement exceeds the preset threshold, that is, the angular displacement corresponding to the busbar contraction amount is greater than the normal cold contraction range, the microprocessor determines that the busbar may be loose. At this time, the displacement sensor 33 on the mounting plate 31 and the case 32 detects the midpoint of the busbar accurately, measures the distance between the busbar and the sensor in real time, and if the distance change exceeds the threshold, it further verifies that the busbar is loose. The microprocessor immediately sends a loose signal to the control system, triggers an audible and light alarm or remote notification, reminds the operation and maintenance personnel to handle it in time, and avoids the increase of contact resistance or the intensification of vibration due to loosening.

[0055] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

Claims

1. A device for equalizing the temperature field of a busbar in a distribution cabinet, comprising a cabinet (1), characterized in that: The cabinet (1) is equipped with a power distribution unit (2), which includes a power distribution busbar (21). A compensation unit (6) is provided on the power distribution busbar (21). The compensation unit (6) includes a compensation block (61). The compensation block (61) is a U-shaped structure. The U-shaped end of the compensation block (61) is a two-ear end structure. Buffer holes (62) are opened on both ears of the compensation block (61). Buffer blocks (63) are hinged in both buffer holes (62). A rotating rod (64) is fixedly connected between the hinge points of the two buffer blocks (63). Buffer arms (65) are fixedly connected on both buffer blocks (63). An angle sensor (66) is installed on the rotating rod (64). Each buffer block (63) is elastically connected to the inner wall of the connected buffer hole (62) with a torsion spring. The buffer arms (65) are all L-shaped structures. The ends of the buffer arms (65) are all wedge-shaped structures. The cabinet (1) is provided with a positioning part (3), the positioning part (3) includes a mounting plate (31), a chassis (32) is installed in the middle of the mounting plate (31), a microprocessor is provided in the chassis (32), a displacement sensor (33) is installed on the chassis (32), the displacement sensor (33) is electrically connected to the microprocessor, the sensing end of the displacement sensor (33) faces the midpoint of the power distribution busbar (21), and a grounding hole (34) is provided on the mounting plate (31). The positioning part (3) is provided with a support part (4), the support part (4) includes a column sleeve (41), an adjusting column (42) is slidably connected to the inner wall of the column sleeve (41), a damping spring (43) is elastically connected between the adjusting column (42) and the column sleeve (41), wedge blocks (44) are connected to both sides of the column sleeve (41), slide rods (45) are fixedly connected to both sides of the adjusting column (42), a support column (46) is provided on the adjusting column (42), a return spring (47) is elastically connected between the support column (46) and the adjusting column (42), a slide groove (48) corresponding to the slide rod (45) is opened on both sides of the support column (46), and a hinge block (49) is installed on one side of the support column (46). There are two support parts (4), which are symmetrically arranged. The wedge blocks (44) in the two support parts (4) respectively abut against the wedge surface of the buffer arm (65) on the same side. The support columns (46) in the two support parts (4) respectively abut against the two ends of the power distribution busbar (21). The two column sleeves (41) are installed at both ends of the mounting plate (31). The support part (4) is provided with a detection part (5), the detection part (5) includes a support plate (51), the support plate (51) is fixedly connected to the mounting plate (31), the end of the support plate (51) is hinged to a support arm (52), an angle sensor (53) is installed on the hinge point of the support arm (52), a support arm (54) is provided on one side of the support arm (52), a limit rod (55) is fixedly connected to the support arm (54), the support arm (54) is slidably connected to the support arm (52) through the limit rod (55), and the angle sensor (53) and the angle sensor (66) are both electrically connected to the microprocessor.

2. The distribution cabinet busbar temperature field equalization control device according to claim 1, characterized in that: The power distribution unit (2) also includes a grounding hole (22), which is opened on the power distribution busbar (21). Insulators (23) are installed at both ends of the power distribution busbar (21), and supports (24) are installed at both ends of the power distribution busbar (21) through the insulators (23).

3. The distribution cabinet busbar temperature field equalization control device according to claim 2, characterized in that: There are two compensation parts (6), and the two compensation parts (6) are arranged symmetrically to each other. The compensation blocks (61) in the two compensation parts (6) respectively abut against the two ends of the power distribution busbar (21), and the two insulating parts (23) respectively pass through the ear ends of the compensation blocks (61) on the same side.

4. The temperature field equalization control device for the busbar of a distribution cabinet according to claim 1, characterized in that: There are two detection units (5), which are symmetrically arranged. The chassis (32) is located between the support plates (51) of the two detection units (5). The two support arms (54) of the two detection units (5) are respectively hinged to the hinge block (49) on the same side.

5. The temperature field equalization control device for the busbar of a distribution cabinet according to claim 1, characterized in that: Two anti-interference covers (7) are symmetrically installed on the mounting plate (31). The two detection units (5) are located inside the two anti-interference covers (7) respectively. A water-cooled plate (8) corresponding to the power distribution busbar (21) is installed inside the cabinet (1). A cabinet door (9) is installed on the cabinet (1).

6. A heat dissipation method for a temperature field equalization control device for a distribution cabinet busbar, as described in any one of claims 1-5, characterized in that... Includes the following steps: Step 1: Under the effect of thermal expansion, the power distribution busbar (21) expands and extends at both ends, and pushes the compensation blocks (61) on both sides to move. The compensation blocks (61) pull the buffer arm (65), causing the buffer arm (65) to move along the inclined plane of the wedge block (44) and generate angular displacement through the hinge. The angular displacement of the rotating rod (64) is detected in real time by the angle sensor (66). The microprocessor receives the signal and synchronously sends it to the power distribution cabinet control system for thermal stress monitoring. Step 2: The distribution busbar (21) continues to expand laterally under the thermal expansion effect. After the buffer block (63) is angularly displaced, it will abut against the buffer hole (62). At this time, the angle of the buffer block (63) is fixed. When the compensation block (61) continues to move, it will press down the wedge block (44) through the buffer arm (65), causing the adjusting column (42) to drop, further providing buffer space for the thermal expansion deformation of the distribution busbar (21). Step 3: During the longitudinal thermal expansion of the power distribution busbar (21), its end will press down on the support column (46). The reset spring (47) always provides elastic support force, causing the support column (46) to support the power distribution busbar (21) in real time, avoiding the increase of the busbar installation gap and causing shaking. The support column (46) descends and pulls the second support arm (54) through the hinge block (49), causing the second support arm (54) to slide on the first support arm (52) through the limit rod (55), and causing the first support arm (52) to generate angular displacement. The angle sensor (53) detects the angular displacement in real time, and receives the signal through the microprocessor and synchronously sends it to the power distribution cabinet control system for thermal stress monitoring. Step 3: When the angle sensor 1 (53) generates angular displacement, the control system will synchronously adjust the water cooling system of the power distribution cabinet, so that the water cooling plate (8) uses higher power to cool the inside of the cabinet (1) and cool the power distribution busbar (21) in real time. Step 4: The power distribution busbar (21) shrinks and deforms under the effect of cold shrinkage and recovers. At this time, angle sensor 1 (53) and angle sensor 2 (66) will generate reverse angular displacement. When the reverse angular displacement returns to zero, it means that the deformation of the power distribution busbar (21) has been reset. When the reverse angular displacement exceeds the threshold, it means that the power distribution busbar (21) is loose. The distance from the power distribution busbar (21) to the sensing end is detected in real time by displacement sensor (33), and the power distribution cabinet control system is simultaneously monitored for the installation stability of the power distribution busbar (21) in real time.

Images