Gas-insulated vehicle-mounted dual-purpose switch combination equipment for high-speed rail and bullet train

Abstract

The invention relates to the technical field of electrical equipment, in particular to gas insulation vehicle-mounted dual-purpose switch combination equipment for high-speed rails and bullet trains. The vehicle-mounted dual-purpose switch combination equipment comprises a gas box, a first loop, electrical elements, a driving assembly and an outer box body, the first loop is annularly arranged in the gas box, the multiple electrical elements are arranged on the first loop and evenly distributed in the circumferential direction of the first loop, the outer box body is arranged on the outer wall of the gas box, and the driving assembly is arranged on the outer wall of the gas box. The driving assembly is installed in the outer box body, and the output end of the driving assembly penetrates through the outer wall of the air box through a sealing assembly to be connected with an electrical element and used for driving the electrical element to act. The vehicle-mounted dual-purpose switch combination equipment is compact in structure, and the top space of a train can be effectively saved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and in particular to a gas-insulated on-board dual-purpose switch assembly device for high-speed trains. Background Art

[0002] Onboard switchgear is a type of electrical equipment designed specifically for vehicles, primarily used to control and protect the circuits in the vehicle's power system. This type of equipment is particularly important in high-speed trains, such as EMUs, as it ensures the train's power system can operate safely and reliably in a variety of complex environmental conditions.

[0003] In the existing technology, the on-board switchgear has a complex structure, numerous connecting cables, and is inconvenient to install and maintain, making it difficult to meet the development needs of lightweight and miniaturized high-speed rail vehicles and complex and changing regional environments. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art and provide a gas-insulated on-board dual-purpose switch assembly device for high-speed trains. The on-board switch assembly device has a compact structure and can effectively save the top space of the train.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions: A gas-insulated on-board dual-purpose switch assembly device for high-speed trains includes an air box, a first circuit, electrical components, a drive assembly, and an outer box body. The first circuit is arranged in an annular manner within the air box, and multiple electrical components are arranged on the first circuit and are evenly distributed along the circumference of the first circuit. The outer box body is arranged on the outer wall of the air box, and the drive assembly is installed in the outer box body. The output end of the drive assembly passes through the outer wall of the air box through a sealing assembly and is connected to the electrical component for driving the electrical component to operate.

[0006] Preferably, the electrical components include a vacuum circuit breaker, an isolating switch, and an earthing switch; the outer box includes a first box and a second box; the drive assembly includes a first drive unit, a second drive unit, and a third drive unit; the vacuum circuit breaker and the isolating switch are arranged on a first circuit; the earthing switch is arranged on one side of the vacuum circuit breaker; the earthing switch is used to be connected to the moving output terminal and the static output terminal of the vacuum circuit breaker to achieve grounding; the first drive unit is installed in the first box, and its output end is connected to the moving contact of the vacuum circuit breaker; the second drive unit is installed in the first box, and its output end is connected to the earthing switch; the third drive unit is installed in the second box, and its output end is connected to the isolating switch.

[0007] Preferably, the vacuum circuit breaker includes a vacuum arc chamber, an insulating pull rod, and a bellows assembly. The first driving unit is a permanent magnet driving component. The upper end of the insulating pull rod is connected to the moving contact of the vacuum circuit breaker. The gas box is provided with a first opening. The bellows assembly includes a bellows shaft and a bellows. The bellows is a double-layer structure. The bellows is sealed and installed at the first opening. The bellows shaft is located inside the bellows, one end of which extends into the first box body and is connected to the permanent magnet driving component, and the other end extends into the gas box and is connected to the lower end of the insulating pull rod.

[0008] Preferably, the grounding switch includes a rotating shaft, a first movable knife and a second movable knife arranged on the rotating shaft, the static outlet terminal and the moving outlet terminal of the vacuum circuit breaker constitute the first static knife and the second static knife respectively, the second driving unit is a first motor, and the output shaft of the first motor is rotatably connected to the rotating shaft, used to drive the rotating shaft to rotate, thereby driving the first movable knife / second movable knife and the first static knife / second static knife to open or close.

[0009] Preferably, the sealing assembly includes a first sealing unit, which includes a rotating connector, a first bearing, a second bearing, and a first skeleton oil seal. One end of the rotating connector is fixedly connected to the output end of the first motor, and the other end is fixedly connected to the rotating shaft. The first bearing and the second bearing are arranged along the axial direction of the rotating connector. The first skeleton oil seal is located between the first bearing and the second bearing. The outer surface of the rotating connector is respectively in compression contact with the sealing surfaces of the first bearing, the first skeleton oil seal, and the second bearing. The sealing surfaces of the first bearing and the second bearing are both provided with a three-lip sealing structure.

[0010] Preferably, the isolating switch includes a movable knife arm and a static knife arm arranged inside the air box, the second box body includes a crank arm box and a power box, the crank arm box is installed on the outer wall of the air box, and the power box is installed on the crank arm box, a second transmission unit is provided in the crank arm box, the third drive unit includes a second motor, the second motor is installed in the power box, and a first transmission unit is also provided in the power box, the first transmission unit includes a first transmission shaft, a second transmission shaft, a first bevel gear, and a second bevel gear. The first transmission shaft and the second transmission shaft are both located in the power box and are arranged perpendicular to each other in a horizontal plane. One end of the first transmission shaft is fixedly connected to the output shaft of the second motor, and the other end is sleeved with the first bevel gear. The second bevel gear is sleeved on one end of the second transmission shaft, the first bevel gear and the second bevel gear are meshed with each other, and the other end of the second transmission shaft extends into the crank arm box and is connected to the second transmission unit. The second transmission unit is connected to the movable knife arm and can move up and down in the vertical direction under the drive of the first transmission unit.

[0011] Preferably, the second transmission unit includes a crank arm and a connecting rod, one end of the crank arm is sleeved on the second transmission shaft, and the other end is hinged to one end of the connecting rod, and the other end of the connecting rod is hinged to the movable knife arm.

[0012] Preferably, a first slot and a first clamping slot are provided in the crank arm box, the end of the second transmission shaft is inserted into the first slot, the width of the first clamping slot is adapted to the width of the crank arm, and the crank arm is installed in the first clamping slot.

[0013] Preferably, the electrical component further includes a voltage transformer, which is connected to the first circuit and is used for voltage measurement.

[0014] Preferably, the electrical component further includes a current transformer, which is connected to the first circuit and is used for current measurement.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] (1) In the present invention, a significant structural optimization is achieved through a coaxial design. The two grounding switches share a common shaft and a drive assembly, which greatly reduces the size and weight of the equipment. This compact design saves space and is particularly suitable for space-constrained onboard environments such as high-speed trains.

[0017] (2) In the present invention, the power transmission direction is changed twice between the first transmission shaft and the second transmission shaft, and between the second transmission shaft and the crank arm, thereby greatly reducing the space occupied by the device on the roof. The device has the characteristics of compact structure, space saving, and adaptability to the narrow environment of the roof. It is particularly suitable for installation environments with limited roof space such as high-speed trains, improves space utilization, and solves the problem of existing disconnectors with non-compact structure and large space occupation.

[0018] (3) In the present invention, the vacuum circuit breaker adopts a double-layer bellows structure made entirely of stainless steel, which can effectively resist mechanical shock and improve air tightness and weather resistance. The monitoring unit detects gas pressure and leakage in real time, ensuring long-term stable operation.

[0019] (4) In the present invention, the vehicle-mounted dual-purpose switch assembly device optimizes the structure of each component and adopts a compact design, thereby greatly improving the structural compactness of the device, thereby effectively saving roof space and facilitating installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the vehicle-mounted dual-purpose switch assembly device of the present invention; Figure 2 It is a structural schematic diagram of the grounding switch and vacuum circuit breaker of the present invention; Figure 3 yes Figure 2 A partial enlarged view of point A in the middle; Figure 4 It is a structural diagram of the isolating switch in the present invention; Figure 5 It is a schematic diagram of the structure inside the crank box of the present invention; Figure 6 yes Figure 5 A partial enlarged view of point B in the middle; Figure 7 Schematic diagram of the structure of the current transformer in the present invention; Figure 8 It is a structural diagram of the voltage transformer in the present invention.

[0021] In the figure: 100-gas box, 200-first circuit, 300-vacuum circuit breaker, 301-vacuum interrupter, 302-insulating pull rod, 303-bellows assembly, 310-isolating switch, 320-grounding switch, 321-rotating shaft, 322-first moving knife, 323-second moving knife, 324-first static knife, 325-second static knife, 400-first box, 410-second box, 411-crankcase, 500-rotating connection, 510-first bearing, 520-second bearing, 530-first skeleton oil seal, 600-moving knife arm, 610-static knife arm, 630-second Drive shaft, 660-crank arm, 670-connecting rod, 680-first slot, 690-first slot, 700-voltage transformer, 710-metal armored casing, 720-coil assembly, 730-insulating filling layer, 740-second conductor, 750-terminal, 800-current transformer, 810-outer sleeve, 820-mounting flange, 830-transformer coil, 840-first conductor, 841-first connecting end, 842-second connecting end, 850-shielding net, 860-conductive connector, 900-third bearing, 910-fourth bearing, 920-second skeleton oil seal. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of the present invention.

[0023] In the description of the present invention, it should be noted that the term "upper" and the like to indicate an orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience and simplification of the description, and do 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.

[0024] In the description of the present invention, the terms “first” and “second” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connect," "dispose," "install," "fix," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integral connection; they may refer to direct connection, indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0026] like Figures 1-8 As shown, this embodiment discloses a gas-insulated onboard dual-purpose switch assembly device for high-speed trains, which is particularly suitable for high-speed trains. The onboard dual-purpose switch assembly device includes an air box 100, a first circuit 200, electrical components, a drive assembly, and an outer box body. The first circuit 200 is arranged in an annular manner within the air box 100, and multiple electrical components are arranged on the first circuit 200 and are evenly distributed along the circumference of the first circuit 200. The outer box body is arranged on the outer wall of the air box 100, and the drive assembly is installed in the outer box body. Its output end passes through the outer wall of the air box 100 through a sealing assembly and is connected to the electrical components to drive the electrical components. The above-mentioned onboard dual-purpose switch assembly device rationally arranges the various electrical components and has a good structural compactness.

[0027] Specifically, the electrical components include a vacuum circuit breaker 300, an isolating switch 310, and a grounding switch 320. The outer housing includes a first housing 400 and a second housing 410, and the drive assembly includes a first drive unit, a second drive unit, and a third drive unit. The vacuum circuit breaker 300 and the isolating switch 310 are both arranged on the first circuit 200, and the grounding switch 320 is arranged on one side of the vacuum circuit breaker 300. The grounding switch 320 is used to connect to the moving and static output terminals of the vacuum circuit breaker 300 to achieve grounding. The first drive unit is installed in the first housing 400, and its output end is connected to the moving contact of the vacuum circuit breaker 300. The second drive unit is installed in the first housing 400, and its output end is connected to the grounding switch 320. The third drive unit is installed in the second housing 410, and its output end is connected to the isolating switch 310. The first housing 400 and the second housing 410 are disposed outside the air box 100, separate from the interior of the air box 100. The drive unit is mounted within the first housing 400 or the second housing 410, while the electrical components are disposed within the air box 100. This effectively isolates the electrical components from the drive unit, achieving modularization and integration. This avoids a large drive unit occupying space within the air box 100, which would otherwise complicate the structure within the air box 100. When the drive unit needs to be repaired or replaced, only the first housing 400 or the second housing 410 needs to be opened, without having to open the air box 100. This improves the ease and efficiency of maintenance of the entire device.

[0028] like Figure 2 As shown, the vacuum circuit breaker 300 includes a vacuum interrupter 301, an insulating rod 302, and a bellows assembly 303. The first drive unit is a permanent magnet drive element. The upper end of the insulating rod 302 is connected to the moving contact of the vacuum circuit breaker 300. The gas box 100 has a first opening. The bellows assembly 303 includes a bellows shaft and a bellows. The bellows has a double-layer structure and is sealed at the first opening. The bellows shaft is located inside the bellows. One end of the bellows shaft extends into the first housing 400 to connect to the permanent magnet drive element, and the other end extends into the gas box 100 to connect to the lower end of the insulating rod 302.

[0029] Specifically, the bellows has a double-layer structure, with the two layers fitted together (the outer walls of the two bellows are fitted together). Made of stainless steel, the bellows possess greater structural strength and stability. Compared to single-layer bellows, the double-layer structure more effectively resists mechanical shock, provides improved airtightness, and prevents external moisture and other contaminants from entering the interior of the gas box 100, thereby ensuring long-term stable operation. Furthermore, the double-layer bellows provide enhanced protection, reducing the chance of failure and damage caused by external factors, thereby helping to extend the service life of the entire vacuum circuit breaker. Furthermore, the high-quality material selection (stainless steel) also ensures the bellows' inherent durability. The bellows utilize laser cladding welding technology to further ensure the airtightness of the gas box 100.

[0030] In addition, in this embodiment, the first box body 400 is a sealed shell, which not only provides effective physical protection for key components inside it to prevent the invasion of external pollutants such as dust and impurities, but also improves the overall structural integration of the gas-insulated circuit breaker, which is conducive to modular design and installation.

[0031] Specifically, the first box body 400 is further equipped with a monitoring unit, which is mainly used to monitor the gas pressure changes inside the gas box 100 and whether there is gas leakage in real time.

[0032] Secondly, it has been verified that the first drive unit uses a permanent magnet drive component and can withstand 1 million fatigue tests, ensuring that it can provide an operating life far exceeding the industry standard (traditional designs are usually less than 500,000 times), significantly improving the durability and reliability of the equipment.

[0033] like Figure 2 As shown, in this embodiment, the grounding switch 320 includes a rotating shaft 321, a first movable blade 322, and a second movable blade 323 mounted on the rotating shaft 321. The static and movable outlet terminals of the vacuum circuit breaker 300 constitute the first and second static blades 324, 325, respectively. The second drive unit is a first motor, whose output shaft is rotatably connected to the rotating shaft 321, and is used to drive the rotating shaft 321 to rotate, thereby driving the first movable blade 322 / second movable blade 323 and the first and second static blades 324 / second static blade 325 to open or close the circuit breaker.

[0034] like Figure 2-Figure 3As shown, the sealing assembly includes a first sealing unit. The first sealing unit includes a rotating connector 500, a first bearing 510, a second bearing 520, and a first skeleton oil seal 530. One end of the rotating connector 500 is fixedly connected to the output end of the first motor, and the other end is fixedly connected to the rotating shaft 321. The first bearing 510 and the second bearing 520 are arranged along the axial direction of the rotating connector 500, and the first skeleton oil seal 530 is located between the first bearing 510 and the second bearing 520. The outer surface of the rotating connector 500 is respectively pressed into contact with the sealing surfaces of the first bearing 510, the first skeleton oil seal 530, and the second bearing 520, and the sealing surfaces of the first bearing 510 and the second bearing 520 are both provided with a three-lip sealing structure.

[0035] Specifically, in this embodiment, the first sealing unit consists of a rotating connector 500, a first bearing 510, a second bearing 520, and a first skeleton oil seal 530. It is worth noting that the first motor in this embodiment is a servo motor. The upper end of the rotating connector 500 is located inside the air box 100 and is fixedly connected to the rotating shaft 321. Its lower end extends outside the air box 100 and is connected to the output shaft of the first motor. The first bearing 510 and the second bearing 520 are arranged vertically in sequence, with the first bearing 510 located at the top and the second bearing 520 located at the bottom. Specifically, the first bearing 510 is mounted on the wall of the air box 100, with the upper section of the rotating connector 500 inserted into it. Similarly, the second bearing 520 is also mounted on the wall of the air box 100, with the lower section of the rotating connector 500 inserted into it. The first skeleton oil seal 530 is positioned between the two bearings, with its inner sealing ring in close contact with the outer surface of the rotating connector 500, ensuring a good dynamic sealing effect.

[0036] Furthermore, the first skeleton oil seal 530 consists of two symmetrically arranged oil seal components, which fit tightly together vertically, with their contact surfaces exhibiting mirror-symmetry. The inner rings of these two oil seals fit tightly against the outer wall of the rotating connector 500, ensuring excellent sealing performance during rotation. Each skeleton oil seal is constructed from a composite of a metal skeleton (such as steel plate) and an elastic material (such as nitrile rubber or fluororubber). The metal skeleton provides support, effectively resisting deformation caused by high pressure or vibration. The sealing lip formed by the elastic material maintains dynamic contact with the outer surface of the rotating connector 500, forming a stable and reliable sealing interface. This structural design balances strength and flexibility, meeting the sealing requirements of complex operating conditions.

[0037] Furthermore, the inner surfaces of the first and second bearings 510 and 520 are each equipped with a sealing structure to provide sealing protection for the bearings themselves. Preferably, these sealing structures employ a three-lip seal design, with a primary lip to prevent lubricant leakage and a secondary lip to prevent dust and moisture from entering the bearing interior, further enhancing the protection level of the entire sealing assembly.

[0038] like Figure 3 As shown, the air box 100 is equipped with an end seat structure specifically for mounting the first skeleton oil seal 530. The outer ring of the first skeleton oil seal 530 fits tightly against the inner wall of the end seat, while its inner ring maintains contact with the outer surface of the rotating connector 500. During installation, the first skeleton oil seal 530 is secured using an interference fit. Its sides are squeezed by the inner wall of the end seat and the outer wall of the rotating connector 500, respectively, generating sufficient radial pressure to ensure a stable and reliable sealing effect.

[0039] Overall, the sealing assembly incorporates three layers of sealing: the sealing structure of the inner ring of the first bearing 510, the first skeleton oil seal assembly, and the sealing structure of the inner ring of the second bearing 520. These three components, arranged vertically, together form a multi-layered protection system, significantly enhancing the sealing capabilities of the airbox 100 and effectively isolating the internal and external environments.

[0040] Furthermore, the rotating connector 500 is designed as a stepped shaft, consisting of a smaller upper diameter and a larger lower diameter. The inner diameter of the first bearing 510 matches the smaller diameter section, while the inner diameter of the second bearing 520 matches the larger diameter section, supporting the corresponding sections of the rotating connector 500. This stepped structure not only helps distribute force, but its stepped surfaces also serve as auxiliary seals, further enhancing overall sealing performance.

[0041] like Figure 4-Figure 6As shown, the isolating switch 310 includes a movable blade arm 600 and a stationary blade arm 610 arranged in the air box 100, and the second box body 410 includes a crank box 411 and a power box. The crank box 411 is installed on the outer wall of the air box 100, and the power box is installed on the crank box 411. A second transmission unit is provided in the crank arm box 411, and the third drive unit includes a second motor. The second motor is installed in the power box. The power box also includes a first transmission unit. The first transmission unit includes a first transmission shaft, a second transmission shaft 630, a first bevel gear, and a second bevel gear. The first transmission shaft and the second transmission shaft 630 are both located in the power box, and the two are arranged perpendicular to each other in the horizontal plane. One end of the first transmission shaft is fixedly connected to the output shaft of the second motor, and the other end is sleeved with the first bevel gear. The second bevel gear is sleeved on one end of the second transmission shaft 630, and the first bevel gear and the second bevel gear are engaged with each other. The other end of the second transmission shaft 630 extends into the crank arm box 411 and is connected to the second transmission unit. The second transmission unit is connected to the movable knife arm 600, and can move up and down in the vertical direction under the drive of the first transmission unit.

[0042] The first transmission shaft and the second transmission shaft 630 are perpendicular to each other in the horizontal plane, and are used to change the transmission direction of the second motor by 90° in the horizontal plane.

[0043] like Figure 4 As shown, further, the second transmission unit includes a crank arm 660 and a connecting rod 670. One end of the crank arm 660 is mounted on the second transmission shaft 630, and the other end is hinged to one end of the connecting rod 670, and the other end of the connecting rod 670 is hinged to the movable blade arm 600. When the second transmission shaft 630 rotates, it drives the crank arm 660 to rotate, thereby driving the connecting rod 670 to rise or fall in the vertical plane, and then drives the movable blade arm 600 and the stationary blade arm 610 to open or close. The connection method between the second transmission shaft 630 and the crank arm 660 changes the power transmission method from the horizontal plane to the vertical plane, thereby once again changing the power transmission direction by 90°.

[0044] Specifically, the second motor drives the first transmission shaft to rotate, thereby driving the second transmission shaft 630 to rotate. The crank arm 660 mounted on the second transmission shaft 630 rotates with the connection between it and the second transmission shaft 630 as the center. When the end connected to the connecting rod 670 rotates toward the direction close to the movable knife arm 600, the movable knife arm 600 in the closed state is lifted by the lifting action of the connecting rod 670, thereby separating from the static knife arm 610. When the end of the crank arm 660 connected to the connecting rod 670 moves to the highest point, the movable knife arm 600 and the static knife arm 610 are separated.

[0045] Furthermore, the second motor drives the first transmission shaft to rotate in the opposite direction, thereby driving the second transmission shaft 630 to rotate in the opposite direction. The crank arm 660, which is mounted on the second transmission shaft 630, rotates about its connection point with the second transmission shaft 630. As the end of the crank arm 660, which is connected to the connecting rod 670, rotates away from the movable blade arm 600, the movable blade arm 600, which is in the open state, falls under the pull of the insulating pull rod 302. When the end of the crank arm 660, which is connected to the connecting rod 670, reaches its lowest point, the movable blade arm 600 and the stationary blade arm 610 are closed.

[0046] like Figure 6 As shown, the crank arm box 411 is provided with a first slot 680 and a first latching slot 690. The end of the second transmission shaft 630 is inserted into the first slot 680. The first slot 680 provides support for the end of the second transmission shaft 630, thereby ensuring the rotational stability of the second transmission shaft 630. The width of the first latching slot 690 is the same as the width of the crank arm 660. The end of the crank arm 660 connected to the second rotation shaft is latched in the first latching slot 690. The first latching slot 690 can ensure that the crank arm 660 does not deviate or wobble in the left and right directions when rotating.

[0047] The second transmission shaft 630 is inserted into the crank box 411 from the side. Since the interior of the crank box 411 is connected to the air box 100, in order to ensure the sealing of the air box 100, a reliable sealing structure needs to be set at the connection between the second transmission shaft 630 and the crank box 411.

[0048] like Figure 6 As shown, specifically, the sealing assembly also includes a second sealing unit. The structure of the second sealing unit is the same as that of the first sealing unit, and includes a third bearing 900, a fourth bearing 910, and a second skeleton oil seal 920. The third bearing 900 and the fourth bearing 910 are arranged along the axial direction of the second transmission shaft 630, and the second skeleton oil seal 920 is located between the third bearing 900 and the fourth bearing 910. The outer surface of the second transmission shaft 630 is in compression contact with the sealing surfaces of the third bearing 900, the second skeleton oil seal 920, and the fourth bearing 910, respectively. The sealing surfaces of the third bearing 900 and the fourth bearing 910 are both equipped with a three-lip seal structure.

[0049] Specifically, in this embodiment, the third bearing 900 and the fourth bearing 910 are arranged in sequence along the horizontal direction, with the third bearing 900 located near the exterior of the crankcase 411, and the fourth bearing 910 located near the interior of the crankcase 411. Specifically, a second skeleton oil seal 920 is arranged between the third bearing 900 and the fourth bearing 910, with its inner seal ring in close contact with the outer surface of the second transmission shaft 630 to achieve a good dynamic sealing effect.

[0050] like Figure 7As shown, the on-board dual-purpose switch assembly device in this embodiment also includes a current transformer 800, which is connected to the first circuit 200 for current measurement. Specifically, the current transformer 800 includes an outer sleeve 810, a mounting flange 820, a transformer coil 830, and a first conductor 840. The mounting flange 820 is fixedly mounted on the outer sleeve 810, the transformer coil 830 is disposed within the outer sleeve 810, and the conductor is installed within the outer sleeve 810 and arranged along the length of the outer sleeve 810. The conductor has a first connection end 841 and a second connection end 842 along the length of the outer sleeve 810. The first connection end 841 is used to connect to the locomotive pantograph, and the second connection end 842 is used to connect to the circuit of the gas tank 100.

[0051] The air tank 100 is a sealed enclosure installed on the locomotive to house various switchgear and electrical components. It is filled with high-pressure nitrogen. The first connection end 841 of the first conductor 840 is used to connect to the locomotive's pantograph. The pantograph contacts the catenary wires, thereby collecting electrical energy and transferring it to the air tank 100 through the first conductor 840. The mounting flange 820 is used to securely connect to the air tank 100.

[0052] Furthermore, a mutual inductor coil 830 is disposed around the first conductor 840 to detect the magnitude of the current passing through the first conductor 840. A ring-shaped shielding mesh 850 is disposed between the mutual inductor coil 830 and the first conductor 840. When the shielding mesh 850 is grounded, it can ensure the formation of a uniform concentric electric field between the high voltage and the ground. This uniform electric field helps prevent excessive local concentration of the electric field, thereby reducing the occurrence of local discharge. The outer sleeve 810 has a conical structure at one end that is inserted into the high-pressure gas tank 100. The gas tank 100 is provided with a mounting hole. The conical structure of the outer sleeve 810 is inserted through the mounting hole on the gas tank 100, and the mounting flange 820 is sealed and connected to the end face of the high-pressure gas tank 100. The shielding mesh 850 is connected to the mounting flange 820 via a conductive connector 860 to achieve grounding.

[0053] like Figure 8 As shown, the on-board dual-purpose switch assembly device in this embodiment also includes a voltage transformer 700, which is connected to the first circuit 200 and is used for voltage measurement. In an EMU, the voltage transformer 700 is a critical component of the power system, primarily used to measure, protect, and monitor the voltage of the EMU power supply system and provide data support for the stable operation of the power system. To enhance the voltage transformer 700's ability to resist external electromagnetic interference and mechanical shock, as well as resonance and overvoltage, a layer of metal armor is provided on the outside of the voltage transformer 700.

[0054] Specifically, the voltage transformer 700 in this embodiment includes a metal armored housing 710, a coil assembly 720, and an insulating filling layer 730 filled within the metal armored housing 710. The coil assembly 720 is disposed within the metal armored housing 710. The coil assembly 720 includes an iron core, a primary coil, and a secondary coil. The secondary coil is sheathed on the iron core, and the primary coil is sheathed on the secondary coil. Furthermore, a second conductor 740 is disposed within the metal armored housing 710. One end of the second conductor 740 is connected to the coil assembly 720, and the other end is connected to the voltage transformer's terminal block 750.

[0055] Specifically, the metal armored housing 710 is constructed from high-mechanical-strength and corrosion-resistant metal materials, such as stainless steel or aluminum alloy. This provides strong physical protection for the internal coil assembly 720, significantly enhancing the overall structural strength and electromagnetic shielding effectiveness of the voltage transformer 700. This material and structural design effectively resists external electromagnetic interference and mechanical shock, maintaining operational stability and measurement accuracy even in complex outdoor environments such as vibration, shock, high temperature, humidity, and salt spray during locomotive operation.

[0056] like Figure 2 As shown, the core adopts an R-shaped structure with a rectangular opening at its center. This design helps reduce the possibility of magnetic saturation in the core during operation, effectively reducing energy loss and excitation current in the no-load state. This not only improves the stability of the voltage transformer 700 in the face of harmonics and overvoltage, but also enhances its load adaptability and overall operational reliability, further ensuring measurement accuracy.

[0057] The insulating filling layer 730 in the voltage transformer 700 and the outer sleeve 810 of the current transformer 800 are made of the same material, which is prepared using the following raw materials: 30-50 parts of trimethylolpropane triglycidyl ether, 10-30 parts of polypropylene glycol, 30-50 parts of epoxy resin, 50-70 parts of hexahydrophthalic acid bisglycidyl ester, 20-30 parts of methylhexahydrophthalic anhydride, 10-20 parts of phenol, 200-400 parts of filler, and 0.2-0.5 parts of color paste.

[0058] Epoxy resin, as the base component, provides the backbone structure. Its epoxy groups react with hexahydrophthalic acid bisglycidyl ester, methyl hexahydrophthalic anhydride, and trimethylolpropane triglycidyl ether to significantly increase the material's crosslinking density and structural rigidity, imparting high strength, excellent electrical insulation, and heat resistance. Polypropylene glycol, a flexible segment, enhances the material's toughness, reduces thermal stress during curing, and reduces cure shrinkage. The addition of polypropylene glycol further enhances crosslinking, significantly improving the material's insulation, thermal stability, and mechanical strength. In this system, the combined use of hexahydrophthalic acid bisglycidyl ester and methyl hexahydrophthalic anhydride curing agents optimizes reaction rate and crosslinking uniformity, resulting in a dense crosslinked structure. Phenol, as an accelerator, accelerates the curing reaction, facilitating rapid curing and molding in subsequent processes. Inorganic fillers improve mechanical strength and enhance insulation properties. Colorant imparts color to the outer sleeve.

[0059] Preferably, the epoxy resin is one or more of bisphenol A epoxy resin, bisphenol F epoxy resin, and alicyclic epoxy resin.

[0060] Preferably, the filler comprises silicon micropowder and / or aluminum hydroxide powder. More preferably, the filler comprises 130 to 250 parts of silicon micropowder and 70 to 200 parts of aluminum hydroxide powder.

[0061] Preferably, the average particle size of the silicon micropowder is 1-100 μm; the average particle size of the aluminum hydroxide powder is 10-500 nm.

[0062] Color paste can be selected in different colors according to actual needs.

[0063] In this embodiment, the gas box 100 is a rectangular structure made of high-strength, lightweight materials (such as aluminum alloy). It is filled with 0.3 MPa nitrogen for insulation and heat dissipation. A lightning arrester is also installed within the gas box 100 and connected to the first circuit 200 to provide overvoltage protection.

[0064] In addition, the gas box 100 of the vehicle-mounted switch assembly device in this embodiment is provided with three multifunctional connection terminals, which support connection methods such as wall bushings and plug-in cables, and have a fast switching function, which are used to connect pantographs, loads and electrical equipment in other carriages respectively.

[0065] like Figure 1 As shown, the wiring terminal on the right is the line inlet, which can be connected by wall bushing and plugging and unplugging cables. The two wiring terminals on the left are the line outlets, which can be connected by plugging and unplugging cables.

[0066] Furthermore, a pressure sensor and a temperature sensor are provided inside the gas box 100 for real-time monitoring of various parameters inside the gas box 100. A status indicator light and an operation panel are provided outside the gas box 100 for easy operation and maintenance.

[0067] The on-board switch assembly device in this embodiment achieves significant structural optimization through a coaxial design. The two grounding switches 320 share a rotating shaft 321 and a drive assembly, significantly reducing the device's size and weight. This compact design saves space and is particularly suitable for space-constrained onboard environments, such as high-speed trains. By changing the power transmission direction twice, between the first and second drive shafts 630, and between the second drive shaft 630 and the crank arm 660, the device significantly reduces the space occupied on the vehicle roof. This compact, space-saving design is adaptable to confined rooftop environments, particularly those on high-speed trains. It is particularly suitable for installation in space-constrained rooftop environments, such as high-speed trains, improving space utilization and resolving the issues of the existing isolating switch 310, which is bulky and occupies a large space. The vacuum circuit breaker 300 utilizes a double-layer, all-stainless steel bellows structure, effectively resisting mechanical shock and enhancing airtightness and weather resistance. A monitoring unit monitors gas pressure and leakage in real time, ensuring long-term stable operation. The vehicle-mounted switch assembly equipment greatly improves the structural compactness of the equipment by optimizing the structure of each component and adopting a compact design, thereby effectively saving roof space and facilitating installation and maintenance.

[0068] Furthermore, the modular design and compact layout of the electrical components maximize space utilization within the gas tank 100, significantly reducing the device's size and weight. The multifunctional connectors support both wall bushing and plug-in cable connections, adapting to various installation scenarios. The interior of the gas tank 100 is gas-insulated, isolating it from the external environment and significantly enhancing the device's adaptability to various environments. The use of devices such as vacuum circuit breakers 300 and lightning arresters enhances safety and reliability. Temperature sensors, pressure sensors, and status indicators facilitate real-time monitoring of device status. With its compact structure, flexible connections, easy installation, safety, reliability, and intelligent design, it effectively meets the requirements of high-speed trains and other similar scenarios.

[0069] It will be understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art will appreciate that various modifications and improvements can be made without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A gas-insulated onboard dual-purpose switch assembly device for high-speed trains, characterized in that: Including air box, primary circuit, electrical components, drive components, and outer box; The first circuit is arranged in an annular shape in the air box, and the plurality of electrical components are arranged on the first circuit and are evenly distributed along the circumference of the first circuit; The outer box body is arranged on the outer wall of the air box, and the driving component is installed in the outer box body. The output end thereof passes through the outer wall of the air box through the sealing component and is connected to the electrical component for driving the electrical component to operate.

2. A gas-insulated onboard dual-purpose switch assembly device for high-speed trains according to claim 1, characterized in that: The electrical components include a vacuum circuit breaker, an isolating switch, and a grounding switch; the outer box includes a first box and a second box; and the drive assembly includes a first drive unit, a second drive unit, and a third drive unit; The vacuum circuit breaker and the isolating switch are arranged on a first circuit, the grounding switch is arranged on one side of the vacuum circuit breaker, and the grounding switch is used to connect to the moving outgoing terminal and the static outgoing terminal of the vacuum circuit breaker to achieve grounding; The first drive unit is installed in the first box, and its output end is connected to the moving contact of the vacuum circuit breaker. The second drive unit is installed in the first box, and its output end is connected to the grounding switch. The third drive unit is installed in the second box, and its output end is connected to the disconnector.

3. A gas-insulated onboard dual-purpose switch assembly device for high-speed trains according to claim 2, characterized in that: The vacuum circuit breaker includes a vacuum interrupter, an insulating pull rod, and a bellows assembly; The first driving unit is a permanent magnetic driving component, and the upper end of the insulating pull rod is connected to the moving contact of the vacuum circuit breaker; The air box is provided with a first opening, and the bellows assembly includes a bellows shaft and a bellows. The bellows is a double-layer structure, and the bellows seal is installed at the first opening. The bellows shaft is located inside the bellows, one end of which extends into the first box body and is connected to the permanent magnet drive component, and the other end extends into the air box and is connected to the lower end of the insulating pull rod.

4. A gas-insulated onboard dual-purpose switch assembly device for high-speed trains according to claim 2, characterized in that: The grounding switch comprises a rotating shaft, a first movable knife and a second movable knife arranged on the rotating shaft, and the static outlet terminal and the movable outlet terminal of the vacuum circuit breaker constitute the first static knife and the second static knife respectively; The second driving unit is a first motor, and the output shaft of the first motor is rotatably connected to the rotating shaft, used to drive the rotating shaft to rotate, thereby driving the first movable knife / second movable knife and the first static knife / second static knife to open or close.

5. A gas-insulated onboard dual-purpose switch assembly device for high-speed trains according to claim 4, characterized in that: The sealing assembly includes a first sealing unit, which includes a rotating connector, a first bearing, a second bearing, and a first skeleton oil seal. One end of the rotating connector is fixedly connected to the output end of the first motor, and the other end is fixedly connected to the rotating shaft; The first bearing and the second bearing are arranged along the axial direction of the rotating connection member, the first skeleton oil seal is located between the first bearing and the second bearing, and the outer surface of the rotating connection member is in compression contact with the sealing surfaces of the first bearing, the first skeleton oil seal, and the second bearing respectively; The sealing surfaces of the first bearing and the second bearing are both provided with a three-lip sealing structure.

6. The gas-insulated onboard dual-purpose switch assembly device for high-speed trains according to claim 2, characterized in that: The isolating switch includes a movable blade arm and a stationary blade arm arranged inside an air box, and the second box body includes a crank box and a power box, the crank box is installed on the outer wall of the air box, and the power box is installed on the crank box; A second transmission unit is provided in the crank box; The third drive unit includes a second motor, which is installed in the power box. The power box is also provided with a first transmission unit, which includes a first transmission shaft, a second transmission shaft, a first bevel gear, and a second bevel gear; The first transmission shaft and the second transmission shaft are both located in the power box and are arranged perpendicular to each other in a horizontal plane. One end of the first transmission shaft is fixedly connected to the output shaft of the second motor, and the other end is sleeved with a first bevel gear. The second bevel gear is sleeved on one end of the second transmission shaft, and the first bevel gear and the second bevel gear are meshed with each other. The other end of the second transmission shaft extends into the crank arm box and is connected to the second transmission unit. The second transmission unit is connected to the movable knife arm and can move up and down along the vertical direction under the drive of the first transmission unit.

7. A gas-insulated onboard dual-purpose switch assembly device for high-speed trains according to claim 6, characterized in that: The second transmission unit includes a crank arm and a connecting rod. One end of the crank arm is sleeved on the second transmission shaft, and the other end is hinged to one end of the connecting rod. The other end of the connecting rod is hinged to the movable knife arm.

8. A gas-insulated onboard dual-purpose switch assembly device for high-speed trains according to claim 7, characterized in that: The crank arm box is provided with a first slot and a first clamping slot, the end of the second transmission shaft is inserted into the first slot, the width of the first clamping slot is adapted to the width of the crank arm, and the crank arm is installed in the first clamping slot.

9. The gas-insulated onboard dual-purpose switch assembly device for high-speed trains according to claim 2, characterized in that: The electrical component further includes a voltage transformer, which is connected to the first circuit and is used for voltage measurement.

10. The gas-insulated onboard dual-purpose switch assembly device for high-speed trains according to claim 2, characterized in that: The electrical component further includes a current transformer, which is connected to the first loop and is used for current measurement.

Images