A vehicle-mounted transformer with a modular expansion structure

Abstract

This invention discloses a vehicle-mounted transformer with a modular expansion structure for use in the field of vehicle-mounted transformers. By setting detachable expansion heat dissipation units, it can adapt to different usage environments. When there is sufficient installation space, the expansion heat dissipation units can be installed on heat dissipation rods to enhance heat dissipation. After operation, they can be removed, which can significantly reduce the overall space occupied by the transformer body and reduce the impact on subsequent transportation. At the same time, when the expansion heat dissipation units are not in operation, multiple expansion heat dissipation units are fixed by connecting units. On the one hand, multiple expansion heat dissipation units form a whole, increasing its stability. On the other hand, the air exchange channel is sealed by the sealing cover, making it difficult for external dust and other substances to enter the air exchange channel. This greatly improves the reliability of the expansion heat dissipation units during idle and transportation processes, making the expansion heat dissipation units less likely to be damaged during transportation.

Description

Technical Field

[0001] This invention relates to the field of vehicle-mounted transformers, and particularly to a vehicle-mounted transformer with a modular expansion structure. Background Technology

[0002] The core functions of vehicle-mounted transformers are mainly reflected in four aspects: first, emergency power supply and temporary substation, enabling rapid restoration of regional power supply in scenarios such as grid maintenance and disaster relief; second, voltage level conversion, providing reliable power for field operations and temporary activities; third, power testing and commissioning, providing adjustable test power for power equipment or new construction projects; and fourth, some new vehicles also have mobile energy storage and grid connection support functions, which can be combined with battery systems to achieve flexible peak shaving and grid connection of new energy sources. Overall, it is a key special equipment in modern power systems used to improve power supply flexibility, reliability, and emergency response capabilities.

[0003] The invention patent with announcement number CN119541998B discloses a novel arrangement device for plate-type heat sinks of vehicle-mounted transformers. In order to ensure the temperature rise of the main body of the vehicle-mounted transformer and the width of the product, the arrangement of multiple sets of plate-type heat sink components is planned in detail. Various specifications of plates are directly inserted into both sides of the high and low voltage tank in the main body of the vehicle-mounted transformer. At the same time, some of the plate-type heat sink components are arranged in a split manner along the long axis, thereby ensuring the width of the main body of the vehicle-mounted transformer and perfectly solving the heat dissipation problem.

[0004] Compared to traditional transformers, vehicle-mounted transformers need to be moved frequently and operate in relatively complex environments. The heat dissipation fins and other structures of traditional transformers may not be able to be properly transported, moved, or used in the confined space of a vehicle during the transfer and actual use of vehicle-mounted transformers, thus affecting their normal operation. Summary of the Invention

[0005] The core of this invention lies in solving the problem of fixed-size transformers hindering daily transportation and use in existing technologies by incorporating detachable extended heat dissipation units. By introducing a connecting unit, multiple extended heat dissipation units are fixed in place when not in operation. This forms a unified whole, increasing stability and reducing the risk of tipping over and being damaged during transportation. Furthermore, the sealing cap prevents external dust and other contaminants from entering the air exchange channel, minimizing their impact on the heat dissipation performance of subsequent units and reducing the likelihood of excessive wear and tear during transport.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A vehicle-mounted transformer with a modular expansion structure adapts to different usage environments by setting a detachable expansion heat dissipation unit: the expansion heat dissipation unit is installed in a relatively spacious location, and after the emergency power supply work is completed, the expansion heat dissipation unit is removed from the heat dissipation rod, reducing the overall space occupied by the transformer body and minimizing the impact on subsequent transportation work.

[0008] Furthermore, the portion of the heat sink rod located on the outside of the mounting platform is fitted with a corrugated protective sleeve. A compression spring is fixedly connected between the upper and lower inner walls of the corrugated protective sleeve. When the corrugated protective sleeve is fully stretched, it has the same length as the portion of the heat sink rod located on the outside of the mounting platform. The lower end of the heat sink body has a transition groove that matches the size of the corrugated protective sleeve, and the position of the transition groove matches the heat sink groove. This makes the exposed portion of the heat sink rod less susceptible to oxidation and corrosion by the air, and less likely to affect the heat conduction effect of the heat sink rod.

[0009] Furthermore, the dustproof net includes a magnetic shell, which is attracted to the side wall of the air inlet of the extended heat dissipation unit. A matching screen is fixedly connected to the inner wall of the magnetic shell. A finger groove is carved at the lower end of the magnetic shell. The dustproof net and the extended heat dissipation unit are fixed together by magnetic attraction, and the finger groove facilitates the installation and removal of the entire dustproof net.

[0010] Meanwhile, a connecting unit connects two adjacent extended heat dissipation units. A connecting groove is cut into the heat dissipation body. The connecting unit includes a sealing cover and a magnetic connecting block. The sealing cover is inserted into the upper opening of the air exchange channel of one extended heat dissipation unit. The magnetic connecting block is inserted into the connecting groove of the adjacent extended heat dissipation unit. A connecting post is fixedly connected to the upper end of the sealing cover. A telescopic rod is fixedly connected between the connecting post and the magnetic connecting block. The connecting unit fixes two idle extended heat dissipation units, which increases the stability of multiple extended heat dissipation units on the one hand, and seals the air exchange channel with the sealing cover on the other hand, making it difficult for external dust and other objects to enter the air exchange channel.

[0011] Furthermore, a limit ring is fixedly connected to the inner wall of the connecting groove, and a matching magnetic plate is slidably connected inside the connecting groove. The magnetic plate is located on the lower side of the connecting groove and is attracted to the magnetic connecting block. A compression spring is fixedly connected between the magnetic plate and the bottom plate of the connecting groove, so that the connection unit and the extended heat dissipation unit are not easy to loosen, and the stability of the connection between two adjacent extended heat dissipation units is increased.

[0012] Furthermore, a limit post is fixedly connected to the bottom plate of the connecting groove to control the limit deformation of the compression spring II, thereby controlling the speed at which the magnetic connecting block separates from the magnetic suction plate, making it less likely for the magnetic connecting block to injure workers.

[0013] Furthermore, a sealing plug is connected between the sealing cap and the connecting groove, and the sealing plug is fixedly connected to the sealing cap and has an interference fit with the connecting groove to increase the sealing effect of the sealing cap.

[0014] Furthermore, the sealing plug has a hollow structure and is filled with multiple filling units, making it easier for the sealing plug to deform and fit the sealing cap and the inner wall of the air exchange channel, thus increasing the sealing effect.

[0015] Furthermore, the lower end of the sealing cap has a chamfered edge, making it easier for the interference-fit sealing plug to be inserted into the air exchange channel.

[0016] Compared with the prior art, the advantages of this invention are:

[0017] This solution incorporates a detachable extended heat dissipation unit to adapt to different usage environments. When there is sufficient installation space, the extended heat dissipation unit can be installed on the heat dissipation rod to enhance heat dissipation. After the work is completed, it can be removed, which can significantly reduce the overall space occupied by the transformer body and facilitate transportation.

[0018] When the extended heat dissipation unit is not in operation, multiple extended heat dissipation units are fixed together using the connecting unit. On the one hand, this makes the multiple extended heat dissipation units form a whole, increasing its stability and making it less likely for the extended heat dissipation units to tip over and be damaged during transportation. On the other hand, the sealing cover seals the air exchange channel, preventing external dust and other contaminants from entering the air exchange channel and affecting the heat dissipation effect of the subsequent extended heat dissipation units. This greatly improves the reliability of the extended heat dissipation units during idle periods and transportation, making them less likely to be damaged during transportation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the vehicle-mounted transformer according to the first embodiment.

[0020] Figure 2 Side sectional view of the vehicle-mounted transformer according to the first embodiment Figure 1 ;

[0021] Figure 3 for Figure 2 Schematic diagram of the structure at point A;

[0022] Figure 4 Side sectional view of the vehicle-mounted transformer according to the first embodiment Figure 2 ;

[0023] Figure 5 This is a schematic diagram of the extended heat dissipation unit in the first embodiment;

[0024] Figure 6 This is a schematic diagram of the dustproof net according to the first embodiment;

[0025] Figure 7 This is a schematic diagram of the structure when the extended heat dissipation unit is combined and placed according to the second embodiment.

[0026] Figure 8 This is a side cross-sectional view of the extended heat dissipation unit assembly in the second embodiment.

[0027] Figure 9 This is a side cross-sectional view of the extended heat dissipation unit in the second embodiment;

[0028] Figure 10 This is a schematic diagram of the connection unit in the second embodiment.

[0029] Explanation of the labels in the diagram:

[0030] 1-Vehicle board, 2-Mounting base, 3-Transformer body, 4-Mounting platform, 5-Heater rod, 6-Compression spring one, 7-Corrugated protective sleeve, 8-Extended heat dissipation unit, 801-Heater body, 802-Air exchange channel, 803-Heat dissipation slot, 804-Transition slot, 805-Connecting slot, 806-Limiting ring, 807-Magnetic suction plate, 808-Limiting post, 809-Compression spring two, 9-Negative pressure fan, 10-Temperature sensor, 11-Dustproof net, 1101-Magnetic shell, 1102-Screen, 1103-Finger groove, 12-Connecting unit, 1201-Sealing cover, 1202-Magnetic connecting block, 1203-Connecting post, 1204-Telescopic rod, 1205-Sealing plug, 1206-Filling unit. Detailed Implementation

[0031] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0032] First implementation method:

[0033] Please see Figures 1-5 A vehicle-mounted transformer with a modular expansion structure includes a transformer body 3 fixedly connected to a mounting base 2 (where the mounting base 2 is fixedly connected to a vehicle-mounted plate 1). Multiple mounting platforms 4 are fixedly connected to opposite side walls of the transformer body 3. Heat dissipation rods 5 are inserted into each of the multiple mounting platforms 4. One end of the heat dissipation rod 5 is located on the upper side of the mounting platform 4, and the other end of the heat dissipation rod 5 passes through the mounting platform 4 and the inner wall of the transformer body 3 in sequence and extends into the transformer body 3.

[0034] An extended heat dissipation unit 8 is placed on the heat dissipation rod 5. The extended heat dissipation unit 8 includes a heat dissipation body 801. A heat dissipation groove 803 is opened on the heat dissipation body 801, and the heat dissipation rod 5 is inserted into the heat dissipation groove 803. An air exchange channel 802 is opened on the heat dissipation body 801. A pair of air inlets are carved into the lower inner side wall of the air exchange channel 802. A dustproof net 11 is fixedly connected inside the air inlet. A negative pressure fan 9 and two temperature sensors 10 are fixedly connected to the inner wall of the air exchange channel 802. The two temperature sensors 10 are located on the side close to the air exchange channel 802 and the air inlet, respectively. The greater the temperature difference between the two temperature sensors 10, the greater the working power of the negative pressure fan 9.

[0035] In this embodiment, the heat generated inside the transformer body 3 is transferred to the outside of the transformer body 3 through the heat dissipation rod 5. The operator can then install an extended heat dissipation unit 8 according to the available space in the actual working environment, such as... Figure 2 As shown, when there is sufficient space on one side, the extended heat dissipation unit 8 is only installed on the side with relatively sufficient space, while the extended heat dissipation unit 8 is not installed on the other side to adapt to the usage environment. After the emergency power supply work is completed, the extended heat dissipation unit 8 can be removed from the heat dissipation rod 5 to reduce the overall space occupied by the transformer body 3 and reduce the impact on subsequent transportation work.

[0036] During normal operation of the transformer body 3, the negative pressure generated by the negative pressure fan 9 causes outside air to enter the air exchange channel 802 through the dustproof net 11, then move upwards and exit from the upper opening of the air exchange channel 802. In this process, the air can fully contact the inner wall of the air exchange channel 802 for heat exchange, thereby achieving a heat dissipation effect. During the continued heat dissipation of the transformer body 3, the temperature sensor 10 will detect the air temperature in real time. The temperature sensor 10 located on the lower side is close to the dustproof net 11, and the temperature it measures is approximately the air temperature, while the temperature sensor 10 located on the upper side is close to the upper opening of the air exchange channel 802, and the temperature it measures is the temperature of the air after heat dissipation. The required heat dissipation power of the transformer body 3 can be determined by the temperature difference between the two temperature sensors 10: the greater the temperature difference between the two temperature sensors 10, the greater the temperature difference between the transformer body 3 and the outside air, requiring an increase in the power of the negative pressure fan 9 to increase the air flow speed in the air exchange channel 802 and increase the heat dissipation effect; conversely, the power of the negative pressure fan 9 should be reduced to decrease the heat dissipation effect and reduce energy consumption.

[0037] In particular, the transformer body 3 in this application should also be equipped with an iron core (not shown in the figure) and other structures, so that the transformer body 3 can complete normal emergency power supply and temporary power transformation work. The transformer body 3 is preferably an oil-immersed transformer. The heat dissipation rod 5, the corrugated protective sleeve 7 and the extended heat dissipation unit 8 are all made of materials with high thermal conductivity. This is a well-known technology to those skilled in the art, so it is not described in detail in the specification and accompanying drawings of this application. At the same time, the specific control and power supply methods of the electrical units in this application (including but not limited to the negative pressure fan 9 and the temperature sensor 10, etc.) are also well-known technologies to those skilled in the art. Those skilled in the art can make reasonable designs to meet the usage requirements.

[0038] A corrugated protective sleeve 7 is fitted over the portion of the heat sink 5 located outside the mounting platform 4. A compression spring 6 is fixedly connected between the upper and lower inner walls of the corrugated protective sleeve 7. When the corrugated protective sleeve 7 is fully stretched, it has the same length as the portion of the heat sink 5 located outside the mounting platform 4. A transition groove 804 matching the size of the corrugated protective sleeve 7 is cut at the lower end of the heat sink body 801. The transition groove 804 is also matched with the position of the heat sink groove 803. When the extended heat sink unit 8 is not installed on the heat sink 5, the corrugated protective sleeve 7 will completely cover the heat sink 5 under the action of the compression spring 6, making the exposed part of the heat sink 5 less susceptible to oxidation and corrosion by the air, and less likely to affect the heat conduction effect of the heat sink 5. When the extended heat sink unit 8 is installed, the compression spring 6 and the corrugated protective sleeve 7 move downward under the action of the inner wall of the transition groove 804, allowing the heat sink 5 and the extended heat sink unit 8 to directly contact each other for better heat dissipation.

[0039] Please see Figure 6 The dustproof net 11 includes a magnetic shell 1101, which is attracted to the air inlet side wall of the extended heat dissipation unit 8. A screen 1102 that matches the magnetic shell 1101 is fixedly connected to the inner wall of the magnetic shell 1101. A finger groove 1103 is carved at the lower end of the magnetic shell 1101. The dustproof net 11 and the extended heat dissipation unit 8 are fixed by magnetic attraction, and the carving of the finger groove 1103 facilitates the overall installation and disassembly of the dustproof net 11.

[0040] Second implementation method:

[0041] Please see Figures 7-10When the extended heat dissipation unit 8 is not installed on the heat dissipation rod 5, a connecting unit 12 is connected between two adjacent extended heat dissipation units 8. A connecting groove 805 is cut into the heat dissipation body 801. The connecting unit 12 includes a sealing cover 1201 and a magnetic connecting block 1202. The sealing cover 1201 is inserted into the upper opening of the air exchange channel 802 of one extended heat dissipation unit 8. The magnetic connecting block 1202 is inserted into the connecting groove 805 of the adjacent extended heat dissipation unit 8. A connecting post 1203 is fixedly connected to the upper end of the sealing cover 1201. A telescopic rod 1204 is fixedly connected between the connecting post 1203 and the magnetic connecting block 1202. The connecting unit 12 fixes two idle extended heat dissipation units 8. On the one hand, it makes multiple extended heat dissipation units 8 form a whole, increasing its stability and making it less likely for the extended heat dissipation units 8 to tip over and be damaged during transportation. On the other hand, the sealing cover 1201 seals the air exchange channel 802, making it difficult for external dust and other substances to enter the air exchange channel 802, and thus not affecting the heat dissipation effect of the subsequent extended heat dissipation units 8.

[0042] A limit ring 806 is fixedly connected to the inner wall of the connecting groove 805. A matching magnetic suction plate 807 is slidably connected inside the connecting groove 805. The magnetic suction plate 807 is located on the lower side of the connecting groove 805 and is attracted to the magnetic connecting block 1202. A compression spring 809 is fixedly connected between the magnetic suction plate 807 and the bottom plate of the connecting groove 805. The attraction force between the magnetic connecting block 1202 and the magnetic suction plate 807 makes the connection between the connecting unit 12 and the extended heat dissipation unit 8 less prone to loosening due to vibration during vehicle transportation, and less likely to affect the fixation of the connecting unit 12 and the extended heat dissipation unit 8. When using the extended heat dissipation unit 8 to remove the connecting unit 12 from the extended heat dissipation unit 8, only the telescopic rod needs to be removed. 1204 is stretched, causing the magnetic connecting block 1202 to press down on the magnetic suction plate 807, storing energy for the compression spring 809. Then, the telescopic rod 1204 is released. Under the action of the compression spring 809 in the compressed state, the magnetic suction plate 807 and the magnetic connecting block 1202 will move upward, and give the magnetic connecting block 1202 enough kinetic energy so that when the magnetic connecting block 1202 and the magnetic suction plate 807 move to the position of the limiting ring 806, the magnetic connecting block 1202 can separate from the magnetic suction plate 807, releasing the fixation between the two, making it less likely for the connection unit 12 and the extended heat dissipation unit 8 to loosen, and increasing the stability of the connection between two adjacent extended heat dissipation units 8.

[0043] A limit post 808 is fixedly connected to the bottom plate of the connecting groove 805 to control the limit deformation of the compression spring 809, thereby controlling the speed at which the magnetic connecting block 1202 separates from the magnetic suction plate 807, so that the magnetic connecting block 1202 is less likely to injure the staff.

[0044] A sealing plug 1205 is connected between the sealing cap 1201 and the connecting groove 805, and the sealing plug 1205 is fixedly connected to the sealing cap 1201 and has an interference fit with the connecting groove 805 to increase the sealing effect of the sealing cap 1201. The sealing plug 1205 has a hollow structure and is filled with multiple filling units 1206, which makes it easier for the sealing plug 1205 to deform and fit into the inner wall of the sealing cap 1201 and the air exchange channel 802, thereby increasing the sealing effect. The lower end of the sealing cap 1201 has a chamfered edge, which makes it easier for the interference fit sealing plug 1205 to be inserted into the air exchange channel 802.

[0045] Compared to the first embodiment, this embodiment introduces a connecting unit 12 to fix multiple extended heat dissipation units 8 when they are not in operation. This makes the multiple extended heat dissipation units 8 form a whole, increasing their stability and making it less likely for them to tip over and be damaged during transportation. On the other hand, the sealing cover 1201 seals the air exchange channel 802, preventing external dust and other contaminants from entering the air exchange channel 802 and affecting the heat dissipation effect of the subsequent extended heat dissipation units 8. Although this increases the cost of using the extended heat dissipation units 8, it significantly improves the reliability of the extended heat dissipation units 8 when idle and during transportation, making them less likely to be damaged during transportation.

[0046] The above description is merely a preferred embodiment of the present invention and encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A vehicle-mounted transformer with a modular expansion structure, comprising a transformer body (3) fixedly connected to a mounting base (2), characterized in that: Multiple mounting platforms (4) are fixedly connected to the opposite side walls of the transformer body (3). Each mounting platform (4) has a heat dissipation rod (5) inserted into it. One end of the heat dissipation rod (5) is located on the upper side of the mounting platform (4), and the other end of the heat dissipation rod (5) passes through the mounting platform (4) and the inner wall of the transformer body (3) and extends into the transformer body (3). An extended heat dissipation unit (8) is placed on the heat dissipation rod (5). The extended heat dissipation unit (8) includes a heat dissipation body (801). A heat dissipation groove (803) is opened on the heat dissipation body (801), and the heat dissipation rod (5) is inserted into the heat dissipation groove (803). An air exchange channel (802) is opened on the heat dissipation body (801). A pair of air inlets are carved into the lower inner wall of the air exchange channel (802). A dustproof net (11) is fixedly connected inside the air inlet. A negative pressure fan (9) and two temperature sensors (10) are fixedly connected to the inner wall of the air exchange channel (802). The two temperature sensors (10) are located on the side close to the air exchange channel (802) and the air inlet, respectively. The greater the temperature difference between the two temperature sensors (10), the greater the working power of the negative pressure fan (9). A connecting unit (12) is connected between two adjacent extended heat dissipation units (8). A connecting groove (805) is cut into the heat dissipation body (801). The connecting unit (12) includes a sealing cover (1201) and a magnetic connecting block (1202). The sealing cover (1201) is inserted into the upper opening of the air exchange channel (802) of one extended heat dissipation unit (8). The magnetic connecting block (1202) is inserted into the connecting groove (805) of the adjacent extended heat dissipation unit (8). A connecting post (1203) is fixedly connected to the upper end of the sealing cover (1201). A telescopic rod (1204) is fixedly connected between the connecting post (1203) and the magnetic connecting block (1202).

2. The vehicle-mounted transformer with a modular expansion structure according to claim 1, characterized in that: The portion of the heat dissipation rod (5) located outside the mounting platform (4) is fitted with a corrugated protective sleeve (7). A compression spring (6) is fixedly connected between the upper and lower inner walls of the corrugated protective sleeve (7). When the corrugated protective sleeve (7) is fully stretched, it has the same length as the portion of the heat dissipation rod (5) located outside the mounting platform (4). The lower end of the heat dissipation body (801) is chiseled with a transition groove (804) that matches the size of the corrugated protective sleeve (7). The transition groove (804) matches the position of the heat dissipation groove (803).

3. The vehicle-mounted transformer with a modular expansion structure according to claim 1, characterized in that: The dustproof net (11) includes a magnetic shell (1101), which is attracted to the air inlet side wall of the extended heat dissipation unit (8). A screen (1102) matching itself is fixedly connected to the inner wall of the magnetic shell (1101), and a finger groove (1103) is chiseled at the lower end of the magnetic shell (1101).

4. A vehicle-mounted transformer with a modular expansion structure according to claim 1, characterized in that: A limiting ring (806) is fixedly connected to the inner wall of the connecting groove (805). A magnetic suction plate (807) matching itself is slidably connected inside the connecting groove (805). The magnetic suction plate (807) is located on the lower side of the connecting groove (805), and the magnetic suction plate (807) is attracted to the magnetic connecting block (1202). A compression spring (809) is fixedly connected between the magnetic suction plate (807) and the bottom plate of the connecting groove (805).

5. A vehicle-mounted transformer with a modular expansion structure according to claim 1, characterized in that: Limiting posts (808) are fixedly connected to the bottom plate of the connecting groove (805).

6. A vehicle-mounted transformer with a modular expansion structure according to claim 1, characterized in that: A sealing plug (1205) is connected between the sealing cap (1201) and the connecting groove (805), and the sealing plug (1205) is fixedly connected to the sealing cap (1201) and is interference-fitted with the connecting groove (805). The lower end of the sealing cap (1201) is provided with a chamfered surface.

7. A vehicle-mounted transformer with a modular expansion structure according to claim 6, characterized in that: The sealing plug (1205) is a hollow structure, and the sealing plug (1205) is filled with multiple filling units (1206).

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