Plateau type integrated high-voltage box

Abstract

The plateau type integrated high-voltage box comprises a frame structure, a high-voltage component layout, a composite insulation structure and an in-box air blowing system, and the high-voltage component layout comprises an incoming cable, a cable without other vehicles, a cable without a transformer, a main breaker, a high isolator, a voltage transformer, a lightning arrester, a current transformer and a soft connecting wire. The layout of a high-voltage loop in a limited space adopts an integrated closed structure, thereby being beneficial to prolonging the service life of high-voltage components and improving the insulation reliability. A composite insulation structure of air insulation and an insulation plate is introduced to physically isolate a high-voltage area from a ground end and perform isolation protection on a high-voltage discharge path; a blowing system in the box is designed by utilizing dry compressed air provided by a vehicle, a dry local environment is always maintained in the box, and the influence of external environment change of a plateau area on high-pressure components is avoided. Component integration is high, an insulation structure is reliable, the overall size is small, and implementation is easy.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of rail vehicle technology, especially a kind of high altitude prototype integrated high-voltage box for rail vehicle motor train unit. BACKGROUND

[0002] Currently, motor train unit mostly runs in plain area, altitude is mostly 1000~1500m, electric locomotive is mostly used in altitude 2500m and below, with the rapid development of China's high-speed railway, high-altitude line has altitude, low air pressure, hypoxia, high cold, large temperature difference and other characteristics, especially the case of tunnel, there is geothermal in tunnel, large temperature difference inside and outside.

[0003] With the increase of altitude, air density decreases, electrical insulation of vehicle high-voltage equipment, switching electrical arc extinguishing performance and tripping performance, corona, temperature rise and other have great influence, especially the insulation performance of electrical equipment decreases significantly, the environmental conditions of line also have certain influence on the external insulation performance of outdoor high-voltage equipment of high-voltage system.

[0004] Currently, there is no directly applicable 4000m highland and above high-altitude locomotive and vehicle high-voltage system. High-voltage box, as a kind of product integrated by high-voltage components, is an important power control equipment, detection equipment and preventive protection equipment of motor train unit power system, and its main function is to distribute high-voltage power supply and maintain normal operation of train. The traditional integrated high-voltage box is limited by high-voltage layout and structure size, and cannot be directly used in highland area.

[0005] Therefore, the present application is proposed. SUMMARY

[0006] The purpose of the present application is to provide a highland prototype integrated high-voltage box to solve the above technical problems existing in the prior art.

[0007] The purpose of the present application is achieved by the following technical solutions:

[0008] The highland prototype integrated high-voltage box of the present application includes four parts: frame structure 1, high-voltage component layout 2, composite insulation structure 3 and box blowing system 4.

[0009] The frame structure 1 is a closed frame of metal material, provided with mounting holes, and the high-voltage component layout 2, composite insulation structure 3 and box blowing system 4 are installed on the frame structure 1, independent of each other and do not interfere with each other.

[0010] Compared with the prior art, the high-altitude integrated high-voltage box provided by the application breaks the design type of the traditional high-voltage box, overcomes the defects of altitude reduction and air insulation performance reduction, improves the insulation performance of high-voltage components, and has compact overall structure and excellent insulation performance, thereby improving the reliability and applicability of the product in the plateau area. The integrated layout of the network side high-voltage electrical equipment is realized, the stable internal environment of the box is maintained through insulation isolation, and the high-voltage box system can normally operate in the plateau area. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 The high-altitude integrated high-voltage box provided by the embodiment of the application is shown in the top view structure schematic diagram.

[0012] Figure 2 The composite insulation structure of the high-altitude integrated high-voltage box provided by the embodiment of the application is shown in the sectional view.

[0013] Figure 3 The internal blowing system of the high-altitude integrated high-voltage box provided by the embodiment of the application is shown in the front view.

[0014] In the drawings:

[0015] 1 frame structure 2 high-voltage component layout 3 composite insulation structure 4 internal blowing system 5 incoming cable 6 current transformer 7 voltage transformer 8 main breaker 9 surge arrester 10 de-transformer cable 11 high-voltage cable 12 de-transformer cable 13 soft wiring;

[0016] 14 insulation plate 15 insulation block 16 middle box cover 17 two side box covers 18 insulation beam;

[0017] 19 air inlet 20 air pipe 21 blowing electromagnetic valve 22 throttle valve 23 exhaust pipe 24 air hole. DETAILED DESCRIPTION

[0018] 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 a part of the embodiments of the application, but not all the embodiments of the application, which do not constitute a limitation on the application. Based on the embodiments of the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0019] First, the terms that can be used in the present text are described as follows:

[0020] The term "and / or" means either one or both, for example, X and / or Y means three cases including "X" or "Y" and "X and Y".

[0021] The terms "comprise", "contain", "include", "have" or other similar semantic descriptions should be interpreted as non-exclusive inclusion. For example, the inclusion of a technical feature element (such as raw materials, components, ingredients, carriers, dosage forms, materials, sizes, parts, components, mechanisms, devices, steps, processes, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or articles, etc.) should be interpreted as not only including the explicitly listed technical feature element, but also including other technical feature elements not explicitly listed but known in the art.

[0022] The term "consisting of" means excluding any technical feature element not explicitly listed. If this term is used in a claim, the term will make the claim closed, so that it does not contain technical feature elements other than those explicitly listed, except for conventional impurities associated therewith. If the term only appears in a certain clause of the claim, it only limits the elements explicitly listed in that clause, and the elements described in other clauses are not excluded from the overall claim.

[0023] Unless otherwise explicitly specified or limited, the terms "mount", "connect", "connect", "fix", and other similar terms should be broadly interpreted, for example: it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this text can be understood according to the specific circumstances.

[0024] The terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting herein.

[0025] The contents not described in detail in the embodiments of the present application belong to the prior art known to those skilled in the art. If the specific conditions are not specified in the embodiments of the present application, they are carried out according to the conventional conditions in the art or the conditions recommended by the manufacturer. If the reagents or instruments used in the embodiments of the present application are not specified by the manufacturer, they are all conventional products that can be purchased on the market.

[0026] The high-altitude prototype integrated high-voltage box of the present application comprises four parts: frame structure 1, high-voltage component layout 2, composite insulation structure 3, and box blowing system 4;

[0027] The frame structure 1 is a closed frame of metal material, provided with mounting holes, the high-voltage component layout 2, the composite insulation structure 3, and the box blowing system 4 are mounted on the frame structure 1, independent of each other and do not interfere with each other.

[0028] The high-voltage component layout 2 includes an incoming cable 5, a current transformer 6, a voltage transformer 7, a main break 8, a lightning arrester 9, a de-transformer cable 10, a high separation 11, a de-other vehicle cable 12, and a soft connection line 13.

[0029] The incoming cable 5 is used to receive the power signal of the catenary to realize the power-on of the main circuit, the current transformer 6 is sleeved on the incoming cable 5 for detecting the current data of the catenary, the voltage transformer 7 is connected to the incoming cable 5 for detecting the voltage data of the catenary, the main break 8 is connected to the incoming cable 5 and the lightning arrester 9 for closing and opening of the main circuit, the lightning arrester 9 is connected to the de-transformer cable 10 at the rear end to output the network voltage to the transformer, the de-transformer cable 10 is connected to the high separation 11 at the rear end for circuit breaking and isolation, the high separation 11 is connected to the de-other vehicle cable 12 at the rear end for connecting two high-voltage boxes, the high-voltage boxes are sequentially connected through the soft connection line 13, and each component is sequentially connected according to the current direction and arranged along the periphery of the frame structure 1.

[0030] The composite insulation structure 3 includes an insulation plate 14, an insulation block 15, a middle box cover 16, two side box covers 17, and an insulation beam 18.

[0031] The insulation block 15 is fixed on the top of the frame structure 1, the insulation plate 14 is fixed on the insulation block 15 to form insulation isolation protection for the top of the frame structure 1, the middle box cover 16 is fixed at the middle position of the lower part of the frame structure 1, the insulation beam 18 is fixed on both sides of the middle box cover 16, and the two side box covers 17 are fixed on both sides of the insulation beam 18 to form insulation isolation protection at the bottom of the frame structure 1.

[0032] The box blowing system 4 includes an air inlet 19, a wind pipe 20, a blowing electromagnetic valve 21, a throttle valve 22, an exhaust pipe 23, and a ventilation hole 24.

[0033] The air inlet 19 is fixed on the frame structure 1 for connecting the dry air source of the vehicle, the wind pipe 20 is connected to the air inlet 19 and the blowing electromagnetic valve 21 at both ends, and the blowing electromagnetic valve 21 is arranged at one corner of the box body through the layout on the frame structure 1, the blowing electromagnetic valve 21 can control the opening and closing of the dry air through power-on and power-off, the throttle valve 22 is arranged at the rear end of the blowing electromagnetic valve 21 for adjusting the size of the blowing flow, the exhaust pipe 23 is arranged at the rear end of the throttle valve 22 for discharging the dry air into the box, and the ventilation hole 24 is arranged on the frame structure 1 and diagonally arranged with the exhaust pipe 23 for discharging the dry air in the box to maintain the pressure balance in the box.

[0034] In summary, the high-altitude prototype integrated high-voltage box of the embodiment of the present application integrates the high-voltage component layout, composite insulation structure, and air blowing system in the box on the box frame structure, thereby realizing the integration, control, and insulation performance of the high-voltage main circuit of the EMU network side, the box frame structure has sufficient strength and rigidity to ensure that the integrated high-voltage box is installed and fixed on the EMU and bears the vibration impact during vehicle operation to protect the internal devices; the high-voltage component layout is arranged on the box frame structure according to the direction of the network side high-voltage current to realize the on-off control of the high-voltage loop, network voltage and current monitoring, and high-voltage fault prevention functions; the composite insulation structure ensures the insulation isolation of the high-voltage conductor and the box, even if the altitude of the plateau area is reduced and the air insulation performance is reduced, the insulation performance of the high-voltage box as a whole can be ensured, the volume of the integrated high-voltage box can be reduced to achieve the goal of miniaturization of the high-voltage box, and the on-board demand of the high-voltage box in the limited space of the EMU is realized; the air blowing system in the box can maintain a dry and clean local environment in the box, effectively avoid the adverse effects of changes in the external environment of the plateau area on the high-voltage system, and ensure the reliability of the insulation performance.

[0035] The present application mainly designs the layout of the high-voltage loop in the limited space, adopts an integrated sealed structure, which is beneficial to the improvement of the service life and insulation reliability of the high-voltage components. The composite insulation structure of the high-voltage box is designed by introducing the composite insulation concept of air insulation + insulation board, the upper and lower double-layer insulation structure physically isolates the high-voltage area from the ground end, isolates and protects the high-voltage discharge path, and minimizes the influence of the decrease of air insulation performance caused by the change of altitude in the plateau area. The air blowing system in the box is designed by using the dry compressed air provided by the vehicle, the dry air is controlled to maintain a dry local environment in the box at all times, avoid the influence of changes in the external environment of the plateau area on the high-voltage components, and maintain the action stability of the components in the box. The high-altitude prototype integrated high-voltage box has high component integration, reliable insulation structure, and small overall size, and is easy to realize.

[0036] In order to more clearly show the technical solutions provided by the present application and the technical effects generated, the following will describe the in detail with specific embodiments.

[0037] The application designs a plateau type integrated high-voltage box, which integrates high-voltage component layout, composite insulation structure, and blowing system in the box on the box frame structure, so as to realize integration, control and insulation performance of the high-voltage main circuit of the network side of the motor train unit. The box frame structure has sufficient strength and rigidity to ensure that the integrated high-voltage box can be installed and fixed on the motor train unit to bear the vibration and impact during vehicle operation. The high-voltage component layout is arranged on the box frame structure according to the direction of the high-voltage current of the network side, so as to realize the functions of high-voltage loop on-off control, network voltage and current monitoring, and high-voltage fault prevention. The composite insulation structure ensures the insulation isolation of the high-voltage conductor and the box, so that even if the altitude of the plateau area is reduced and the air insulation performance is reduced, the overall insulation performance of the high-voltage box can be ensured, and the volume of the integrated high-voltage box can be reduced to achieve the goal of miniaturization of the high-voltage box, and the installation of the high-voltage box in the limited space of the motor train unit is realized. The blowing system in the box can maintain a dry and clean local environment in the box, effectively avoid the adverse effects of changes in the external environment of the plateau area on the high-voltage system, and ensure the reliability of the insulation performance. The integrated high-voltage box can adapt to the plateau environment, avoid the influence of changes in the external environment of the plateau area on the high-voltage components, and maintain the stability of the operation of the components in the box. The plateau type integrated high-voltage box has high component integration, reliable insulation structure, simple and compact overall structure, and high reliability.

[0038] The frame structure is mainly used for installation and fixation of high-voltage components, composite insulation structure, and blowing system in the box. The high-voltage component layout includes incoming cable, outgoing cable, outgoing transformer cable, main break, high-voltage isolation, voltage transformer, surge arrester, current transformer, and soft wiring. The incoming cable and outgoing cable are arranged on the same side of the long side of the box, and the outgoing transformer cable is arranged on the opposite side of the long side of the box. The main break is a horizontal structure, and the high-voltage isolation is an outward opening structure, which are arranged on the short sides of the two sides of the box. The voltage transformer and the surge arrester are symmetrically arranged on the long side of the box. The current transformer is sleeved on the incoming cable in a through manner. Each high-voltage component is installed on the box frame structure, and the components are connected by soft wiring to form a current channel. The layout is arranged along the current direction and clockwise around the box, and the high-voltage loop has no cross influence. The composite insulation structure of the high-voltage box introduces the design concept of air insulation + insulation plate. An insulation plate is arranged on the top of the box and fixed on the top of the box frame structure by an insulation block, which is used for top insulation protection. The bottom of the box is provided with an insulation cover, which is divided into a middle cover and two side covers and connected and fixed by an insulation beam, which is used for bottom insulation protection. The double-layer composite insulation structure insulates the high-voltage from the outside, thereby improving the insulation performance of the integrated high-voltage box. The blowing system in the box is arranged on the side wall of the box. Dry air is input through the air inlet, reaches the blowing electromagnetic valve through the air pipe, controls the dry air, controls the flow size through the throttle valve, discharges the dry air into the box through the exhaust pipe, and finally discharges the box outside. The plateau type integrated high-voltage box for motor train unit has simple overall structure, stable insulation performance, and very broad application prospect.

[0039] Embodiment 1

[0040] As shown in Figures 1 to 3 :

[0041] The high-altitude integrated high-voltage box (as shown in Figure 1 ) is divided into four parts: frame structure 1, high-voltage component layout 2, composite insulation structure 3, and in-box air blowing system 4.

[0042] The high-voltage component layout 2 includes incoming cable 5, current transformer 6, voltage transformer 7, main break 8, surge arrester 9, off-transformer cable 10, high separation 11, off-other vehicle cable 12, and soft wiring 13. The composite insulation structure 3 includes insulation plate 14, insulation block 15, middle box cover 16, two-side box cover 17, and insulation beam 18. The in-box air blowing system 4 includes air inlet 19, air pipe 20, air blowing electromagnetic valve 21, throttle valve 22, exhaust pipe 23, and air vent 24. The present application designs a high-altitude integrated high-voltage box structure and its high-voltage layout. The high-altitude integrated high-voltage box (as shown in Figure 1 ) is assembled in the following way: the frame structure 1 is a closed frame made of metal material, provided with mounting holes, which can be installed and configured as needed. The high-voltage component layout 2, composite insulation structure 3, and in-box air blowing system 4 are installed on the frame structure 1, independent of each other and not interfering with each other. The incoming cable 5 is used to receive the power signal of the catenary to realize the power-on of the main circuit. The current transformer 6 is sleeved on the incoming cable 5 to detect the current data of the catenary. The voltage transformer 7 is connected to the incoming cable 5 to detect the voltage data of the catenary. The main break 8 is connected to the incoming cable 5 and the surge arrester 9 to close and open the main circuit. The surge arrester 9 is connected to the off-transformer cable 10 at the rear end to output the network voltage to the transformer. The off-transformer cable 10 is connected to the high separation 11 at the rear end to isolate the main circuit. The high separation 11 is connected to the off-other vehicle cable 12 at the rear end to connect two high-voltage boxes. The high-voltage is sequentially connected through the soft wiring 13. Each component is sequentially connected according to the current direction, and is arranged along the four sides of the frame structure 1 without crossing.

[0043] The composite insulation structure 3 (as shown in Figure 2 ) is assembled in the following way: the insulation block 15 is fixed on the top of the frame structure 1, and the insulation plate 14 is fixed on the insulation block 15 to form insulation isolation protection for the top of the frame structure 1. The middle box cover 16 is fixed at the middle position of the lower part of the frame structure 1, and the insulation beam 18 is fixed on both sides of the middle box cover 16. The two-side box cover 17 is fixed on both sides of the insulation beam 18 to form insulation isolation protection at the bottom of the frame structure 1.

[0044] The in-box air blowing system 4 (as shown in Figure 3The assembly mode is as follows: the air inlet 19 is fixed on the frame structure 1, a dry air source of a vehicle is connected, the air pipe 20 is connected with the air inlet 19 and the blowing electromagnetic valve 21 respectively at two ends, the blowing electromagnetic valve 21 is arranged at a corner of the box on the frame structure 1, the blowing electromagnetic valve 21 controls the opening and closing of the dry air through power-on and power-off, the throttle valve 22 is arranged at the rear end of the blowing electromagnetic valve 21, and the size of the blowing flow is adjusted, the exhaust pipe 23 is arranged at the rear end of the throttle valve 22, and the dry air is discharged into the box, the air hole 24 is arranged on the frame structure 1 and is arranged at an opposite angle with the exhaust pipe 23, and the dry air in the box is discharged out of the box to maintain the pressure balance in the box.

[0045] The high-altitude integrated high-voltage box of the application breaks the design type of the traditional high-voltage box, overcomes the defects of altitude reduction and air insulation performance reduction, improves the insulation performance of high-voltage components, and has compact overall structure and excellent insulation performance, thereby improving the reliability and applicability of the product in the plateau area.

[0046] The above description is only the preferred embodiment of the application, but the protection scope of the application is not limited to this. Any changes or replacements within the technical range disclosed in the application can be easily thought by those skilled in the art, and should be covered in the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims. The information disclosed in the background section of the application is only intended to deepen the understanding of the general background of the application, and should not be regarded as acknowledging or implying that the information constitutes the prior art known by those skilled in the art.

Claims

1. A high-altitude integrated high-voltage box, characterized in that, It consists of four parts: frame structure (1), high voltage component layout (2), composite insulation structure (3), and internal air blowing system (4). The frame structure (1) is a sealed frame made of metal and has mounting holes. The high-voltage component layout (2), composite insulation structure (3), and in-box blowing system (4) are installed on the frame structure (1) and are independent of each other and do not interfere with each other.

2. The high-voltage integrated high-pressure box according to claim 1, characterized in that, The high-voltage component layout (2) includes an incoming cable (5), a current transformer (6), a voltage transformer (7), a main circuit breaker (8), a surge arrester (9), a cable to the transformer (10), a high-voltage barrier (11), a cable to another vehicle (12), and a flexible connection (13). The incoming cable (5) is used to receive the power signal of the contact network and realize the main circuit is energized. The current transformer (6) is sleeved on the incoming cable (5) to detect the current data of the contact network. The voltage transformer (7) is connected to the incoming cable (5) to detect the voltage data of the contact network. The main circuit breaker (8) connects the incoming cable (5) and the surge arrester (9) to close and open the main circuit. The rear end of the surge arrester (9) is connected to the transformer cable (10) to output the grid voltage to the transformer. The rear end of the transformer cable (10) is connected to the high isolation barrier (11) to disconnect the main circuit. The rear end of the high isolation barrier (11) is connected to the other cable (12) to connect the two high-voltage boxes. The high-voltage boxes are connected sequentially through the flexible cable (13). The components are connected in sequence according to the current direction and are arranged around the frame structure (1).

3. The high-voltage integrated high-pressure box according to claim 2, characterized in that, The composite insulation structure (3) includes an insulation board (14), an insulation block (15), a middle box cover (16), two side box covers (17), and an insulation beam (18); The insulating block (15) is fixed on the top of the frame structure (1), and the insulating plate (14) is fixed on the insulating block (15) to form an insulating isolation protection for the top of the frame structure (1). The middle box cover (16) is fixed in the middle position of the lower part of the frame structure (1). The insulating beams (18) are fixed on both sides of the middle box cover (16), and the two side box covers (17) are fixed on both sides of the insulating beams (18) to form an insulating isolation protection at the bottom of the frame structure (1).

4. The high-voltage integrated high-voltage box according to claim 3, characterized in that, The in-box blowing system (4) includes an air inlet (19), an air duct (20), a blowing solenoid valve (21), a throttle valve (22), an exhaust pipe (23), and a vent (24). The air inlet (19) is fixed on the frame structure (1) and is used to connect the vehicle's drying air source. The air duct (20) is connected to the air inlet (19) and the blowing solenoid valve (21) at both ends respectively. The blowing solenoid valve (21) is arranged in a corner of the box by the frame structure (1). The blowing solenoid valve (21) can control the opening and closing of the drying air by being energized and de-energized. The throttle valve (22) is arranged at the rear end of the blowing solenoid valve (21) and is used to adjust the blowing flow rate. The exhaust pipe (23) is arranged at the rear end of the throttle valve (22) and is used to discharge the drying air into the box. The vent (24) is arranged on the frame structure (1) and is arranged diagonally with the exhaust pipe (23) to discharge the drying air in the box out of the box and maintain the pressure balance in the box.

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