CN109263476B - Power supply line protection device for railway passenger car - Google Patents
Power supply line protection device for railway passenger car Download PDFInfo
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- CN109263476B CN109263476B CN201810986086.8A CN201810986086A CN109263476B CN 109263476 B CN109263476 B CN 109263476B CN 201810986086 A CN201810986086 A CN 201810986086A CN 109263476 B CN109263476 B CN 109263476B
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- clamp spring
- fuse
- power supply
- protection device
- passenger car
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/26—Rail vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Abstract
The invention relates to the field of railway passenger car accessories, in particular to a railway passenger car power supply line protection device. The purpose is to provide a power supply circuit protection device for a railway passenger car; the technical scheme is as follows: the fuse protector comprises a base and a fuse, wherein the base is provided with an accommodating groove, mounting holes are formed in two sides of the accommodating groove, and a left wiring terminal and a right wiring terminal are respectively fixed at two ends of the bottom of the accommodating groove; a necking U-shaped clamp spring is fixed between the left wiring terminal and the right wiring terminal and is connected with the left wiring terminal through a conducting strip; the inner diameters of the left lantern ring and the right lantern ring are larger than the outer diameter of the fuse, a plurality of fastening spring pieces are uniformly arranged on the inner walls of the left lantern ring and the right lantern ring, and the fastening spring pieces are respectively sleeved outside the conductive rings at two ends of the fuse; the left lantern ring is provided with two fixing pieces which are distributed in an inverted V shape, the fixing pieces are in sliding fit with the lower end of the inner side of the clamp spring, and the right lantern ring is connected with the right wiring terminal through a spring conducting strip; an elastic limiting piece is further fixed on the end of the conducting piece connected with the clamp spring, and the elastic limiting piece inclines towards the conducting piece. The anti-seismic device has the characteristics of good anti-seismic performance and high reliability.
Description
Technical Field
The invention relates to the field of railway passenger car accessories, in particular to a railway passenger car power supply line protection device.
Background
At present, railway carriages in China all adopt a DC600V power supply system, a pantograph is in contact with a power grid, single-phase high-voltage alternating current is subjected to concentrated inversion, rectification and filtering of a locomotive to form DC600V, and the DC600V is divided into two paths to supply power to trains. The power supply system mainly comprises equipment such as a DC600V vehicle-end connector, a DC600V/AC380V inverter, a DC600V/DC110V power supply device, a distribution box/cabinet, a storage battery pack, a DC600V power transmission and distribution wire cable, an electric load and the like.
Two DC600V trunk lines are arranged under the vehicle and respectively arranged at two side wire grooves under the vehicle, and the full-row through is realized through the connection of the vehicle end connectors. 2 paths of DC600V power branches input by each passenger car are respectively led to an on-board integrated control cabinet from an off-board distribution box for an off-board inverse power supply device, a DC110V power supply device, an electric heater load and other devices; short circuit and overload protection of a DC600V main line are realized by a locomotive DC600V power supply system (a microcomputer power supply protection system), and the lower-level load of the integrated control cabinet is completed by a circuit protection switch, a fuse or the combination of the circuit protection switch and the fuse. The fuses used by the railway passenger car are all fast fuses, and pure silver sheets are arranged into a round hole narrow neck structure to be made into a melt; when short-circuit fault occurs, the current density at the narrow neck is high, and then the narrow neck is firstly fused, and the circuit is cut off, so that the power supply circuit is protected.
The pure silver has good ductility and softness, and the solution is directly connected with the fixed seat when the pure silver is used; when the fuse is used, the cable is directly connected with the fixed seat, the installed stress is conducted to the solution, the service life and the response characteristic of the fuse are influenced, and the fuse is short in service life and low in safety and reliability. When the fuse is installed on railway vehicle, two installation modes are mainly available: firstly, directly fix the both ends of fuse on the insulator, do not have corresponding damper, the vibration direct transfer that produces in the train operation gives the fuse, and the melt also vibrates thereupon, leads to the narrow neck size of melt to change for the breaking capacity of fuse is unstable, and the power consumption safety can not obtain guaranteeing, endangers driving safety even. The other is that the fuse is arranged in a shell, an elastic conducting strip is arranged at the lower end of the shell, an upper conducting strip is connected with the other end of the fuse through a threaded ring, a ceramic knob on the threaded ring is used for screwing, and the fuse is connected with an upper conducting strip and a lower conducting strip through extrusion; if the porcelain knob appears not hard up in the in-process of train operation, cause contact failure easily, the conducting strip generates heat, and the burning moulds the shell, has the potential safety hazard.
In addition, a DC600V power branch line wiring line leading from an under-vehicle distribution box to an on-vehicle integrated control cabinet has no short circuit and overload protection, if the DC600V branch line is over-current, short circuit or generates electric leakage due to poor insulation between positive and negative lines of the line, the line is further in fire, and the potential safety hazard of wiring fire exists, so that a protection device needs to be additionally arranged on the branch line.
Disclosure of Invention
The invention aims to provide a power supply line protection device of a railway passenger car, which is convenient to install, shock-resistant and high in reliability.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the fuse protector comprises a base and a fuse, wherein the base is cuboid, a containing groove is formed in the middle of the base, mounting holes are formed in the two sides of the base, and a left binding post and a right binding post are respectively fixed at the two ends of the bottom of the containing groove; a clamp spring is arranged between the left wiring terminal and the right wiring terminal and is connected with the left wiring terminal through a conducting strip, the clamp spring is in a necking U shape, the bottom of the clamp spring is fixed at the bottom of the accommodating groove, and the side wall of the clamp spring is parallel to the side wall of the base; the inner diameters of the left lantern ring and the right lantern ring are larger than the outer diameter of the fuse conducting ring, a plurality of fastening spring pieces are uniformly arranged on the inner wall of the left lantern ring and the right lantern ring, and the fastening spring pieces are respectively sleeved outside the conducting rings at two ends of the fuse; the left lantern ring is provided with two fixing pieces which are distributed in an inverted V shape, the fixing pieces are in sliding fit with the lower end of the inner side of the clamp spring, and the right lantern ring is connected with the right wiring terminal through a spring conducting strip; an elastic limiting piece is further fixed on the end of the conducting piece connected with the clamp spring, and the elastic limiting piece inclines towards the conducting piece.
Preferably, the conducting strip is trapezoidal, a guide rod is arranged in the middle of the conducting strip, a pressing block is sleeved on the guide rod, and a compression spring is arranged between the pressing block and the conducting strip; the clamp spring is characterized in that two pressing sheets are arranged on one side, close to the clamp spring, of the pressing block, the pressing sheets are located between the upper end of the inner side of the clamp spring and the left sleeve ring and are in sliding fit with the clamp spring, and the minimum distance between the two pressing sheets is smaller than the width of the elastic limiting sheet.
Preferably, still include the expansion plate, the expansion plate both ends respectively with left lantern ring, right lantern ring fixed connection.
Preferably, the top of the base is provided with a sliding chute, the sliding chute is matched with a sliding cover plate, and the height of the sliding cover plate is higher than that of the telescopic plate; the side face of the sliding groove opposite to the bottom face of the sliding cover plate is provided with sealing rubber, the two ends of the base are provided with threading holes, the threading holes are provided with rubber sleeves, and the inner diameter of each rubber sleeve is slightly smaller than the wire diameter of the adaptive wire.
Preferably, the middle part of the sliding cover plate is provided with a vent hole, and the vent hole is covered by a waterproof breathable film.
Preferably, one end of the sliding chute penetrates through the end part of the base, and the other end of the sliding chute is closed.
Preferably, a handle is arranged at one end, close to the closed end of the sliding chute, of the sliding cover plate.
Preferably, the included angle between the elastic limiting piece and the conducting piece is greater than 80 degrees.
Preferably, the sealing rubber and the rubber sleeve are made of water-swellable rubber.
The beneficial technical effects of the invention are as follows: a necking U-shaped snap spring is fixed between the left terminal and the right terminal, a plurality of fastening spring pieces are uniformly arranged on the inner walls of the left sleeve ring and the right sleeve ring and sleeved outside the fuse, the right sleeve ring is connected with the right terminal through a spring conducting strip, and an elastic limiting piece is fixed on the end of the conducting strip connected with the snap spring; the fastening spring piece can fasten the fuse and absorb the radial vibration of the fuse, the spring conducting strip and the elastic limiting strip limit the radial degree of freedom of the fuse and absorb the radial vibration, and the spring conducting strip can absorb the vibration in all directions and realize the omnibearing vibration absorption, so the invention has good anti-seismic effect and high reliability.
In addition, when the installation, the back is accomplished in the wiring, only needs to insert the right lantern ring with the one end of fuse, and the other end inserts the left lantern ring to it can to impress the jump ring inscription with the left lantern ring, and the installation is simple, convenient, swift. If the fuse is to be replaced, the clamp spring and the elastic limiting sheet are loosened, the fuse can be popped out through the resilience force of the conducting sheet of the spring, and the fuse is convenient and fast to maintain. Moreover, the sliding groove and the sliding cover plate are arranged at the upper part of the base, the rubber sleeve is arranged in the threading hole, and the sealing rubber is arranged in the sliding groove, so that the protective box has higher protection level, and can be directly arranged outside the box body, and the mounting position is flexible and changeable.
Therefore, the invention has the characteristics of simple, convenient and quick installation and maintenance, shock resistance and high reliability.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a schematic view of the connection of components within the receiving chamber of the present invention;
FIG. 3 is a schematic cross-sectional view of the present invention without a sliding cover plate;
FIG. 4 is an enlarged view of portion A of FIG. 3 according to the present invention;
FIG. 5 is a schematic view of a clamp spring of the present invention;
FIG. 6 is a schematic view of the left collar of the present invention;
FIG. 7 is a schematic view of the right collar of the present invention;
FIG. 8 is a schematic view of a briquette according to the present invention;
FIG. 9 is a schematic view showing the fitting state of the clamp spring and the left sleeve ring.
Detailed Description
Referring to fig. 1-9, the power supply line protection device for the railway passenger car comprises a base 1 and a fuse 2, wherein an accommodating groove is formed in the middle of the base 1, mounting holes 3 are formed in two sides of the base 1, and a left wiring terminal 4 and a right wiring terminal 5 are respectively fixed at two ends of the bottom of the accommodating groove; a clamp spring 6 is arranged between the left terminal 4 and the right terminal 5, the clamp spring 6 is connected with the left terminal 4 through a conducting strip 7, the clamp spring 6 is in a necking U shape, the bottom of the clamp spring 6 is fixed at the bottom of the accommodating groove, and the side wall of the clamp spring 6 is parallel to the side wall of the base 1; the fuse protector further comprises a left sleeve ring 13 and a right sleeve ring 14, wherein the inner diameters of the left sleeve ring 13 and the right sleeve ring 14 are larger than the outer diameter of the conductive ring of the fuse 2, a plurality of fastening spring pieces 15 are uniformly arranged on the inner walls of the left sleeve ring 13 and the right sleeve ring 14, and the fastening spring pieces are respectively sleeved outside the conductive rings at two ends of the fuse 2; the left lantern ring 13 is provided with two fixing pieces 16 which are distributed in an inverted V shape, the fixing pieces are in sliding fit with the lower end of the inner side of the clamp spring 6, and the right lantern ring 14 is connected with the right wiring terminal 5 through a spring conducting strip 17; an elastic limiting piece 23 is further fixed on the end of the conducting piece 7 connected with the clamp spring 6, and the elastic limiting piece 23 inclines towards the conducting piece 7.
Specifically, the base 1 is cuboid, the middle part of the base is hollowed to form an accommodating groove with an opening at the upper end and other closed side surfaces, the two sides of the bottom of the base 1 are provided with lugs, and the lugs are provided with mounting holes 3 to facilitate the mounting of a power supply circuit protection device of a railway passenger car; left terminal 4, right terminal 5 are used for the installation fixed cable, generally adopt the terminal of screw and connection frame combination, make things convenient for quick installation and the dismantlement of cable. The bottom of the clamp spring 6 is fixed or embedded in a position close to the left wiring terminal 4 through a bolt, the cross section of the clamp spring is in a necking U shape, namely the upper positions of two side walls of the clamp spring 6 are recessed, the upper part of the clamp spring forms a bottomless V-shaped shape, and the lower part of the clamp spring forms an inverted bottomless V-shaped shape; meanwhile, the side wall of the clamp spring 6 is parallel to the side wall of the base 1, namely, the necking U-shaped section of the clamp spring 6 is parallel to the two end faces of the base 1, so that when the left sleeve ring 13 is pressed in, the axis of the left sleeve ring 13 is parallel to the side edge of the base 1.
The conducting strip 7 is fixed on the base 1 through bolts or directly embedded on the base 1. The lower end of the left lantern ring 13 is provided with a fixing piece 16 which is distributed in an inverted V shape and can be attached to the lower part of the clamp spring 6; in addition, the left sleeve ring 13 and the right sleeve ring 14 are made of metal and are sleeved on the conductive rings at two ends of the fuse 2, the fastening spring pieces 15 are arranged inside the left sleeve ring 13 and the right sleeve ring 14, the surfaces of the fastening spring pieces, which are in contact with the conductive rings of the fuse 2, are attached to the conductive rings, and the radial vibration of the fuse 2 can be absorbed. One end of the spring conducting strip 17 is fixed on the right binding post 5, the other end of the spring conducting strip is fixedly connected with the lower end of the right lantern ring 14, and the spring conducting strip is matched with the elastic limiting strip 23 to absorb the axial vibration of the fuse 2, so that the vibration of the fuse 2 in all directions can be absorbed, and the shock-proof structure has a good shock-proof effect and high reliability.
When the power supply line protection device is installed, a bolt penetrates through the installation hole 3 to fix the power supply line protection device in a junction box or a comprehensive control cabinet; then cables are respectively fixed on the left binding post 4 and the right binding post 5; then insert the one end of fuse 2 in the right lantern ring 14, fix it through fastening spring piece 15, then use the left lantern ring 13 cover at the other end of fuse 2, fix its conductive ring in the left lantern ring 13, wherein the central line of two stationary blades 16 on the left lantern ring 13 is vertical downwards, press into jump ring 6 with the left lantern ring 13 at last, can accomplish the installation of power supply line protection device, consequently the installation is simple convenient, swift. It should be understood that the installation direction of the fuse 2 needs to be identical to the direction of the current.
In the process of pressing the left lantern ring 13, the end of the fixing piece 16 is firstly contacted with two sides of the opening at the upper end of the clamp spring 6, along with the downward movement of the left lantern ring 13, the end of the fixing piece 16 slides on the side wall of the clamp spring 6 and pushes away the two side walls of the clamp spring 6 until the fixing piece 16 reaches the necking part of the clamp spring 6. And when the end of the fixing piece 16 passes through the necking of the clamp spring 6, the two side walls of the clamp spring 6 begin to rebound through elasticity, and meanwhile, the outer side of the fixing piece 16 begins to contact the elastic limiting piece 23 and compresses the elastic limiting piece 23. When the fixing piece 16 completely enters the lower part of the necking of the clamp spring 6, the two sides of the clamp spring 6 are restored to the original state; the left sleeve ring 13 is loosened, the fixing piece 16 is limited in the left sleeve ring by the necking of the clamp spring 6, and in addition, the elastic limiting piece 23 and the spring conducting piece 17 limit the axial degree of freedom of the fuse 2, so that the fuse 2 is fixed. When changing fuse 2, only need expand the necking down of jump ring 6, press spacing piece of elasticity 23, through spring conducting strip 17 alright pop out the left lantern ring to change. Therefore, the fuse 2 can be replaced quickly and conveniently.
Furthermore, the conducting strip 7 is trapezoidal, a guide rod 8 is arranged in the middle of the conducting strip 7, a pressing block 9 is sleeved on the guide rod 8, and a compression spring 10 is arranged between the pressing block 9 and the conducting strip 7; the pressing block 9 is provided with two pressing sheets 11 on one side close to the clamp spring 6, the pressing sheets 11 are located between the upper end of the inner side of the clamp spring 6 and the left sleeve ring 13 and are in sliding fit with the clamp spring 6, and the minimum distance between the two pressing sheets 11 is smaller than the width of the elastic limiting sheet 23. It can be understood that the conducting strip 7 is trapezoidal, the length of the short bottom edge is the same as the width of the cross section of the left binding post 4 and is fixedly connected with the cross section of the left binding post, and the length of the long bottom edge is the same as the width of the cross section of the clamp spring 6 and is fixedly connected with the cross section of the left binding post, so that the contact resistance can be reduced. The guide rod 8 is fixed in the middle of the conducting strip 7, the sliding block 9 is sleeved on the guide rod 8 and can move up and down on the guide rod 8, one end of the compression spring 10 is fixed on the pressing block 9, and the other end of the compression spring is fixed on the conducting strip 7 to prevent the pressing block 9 from separating from the guide rod 8; the pressing sheet 11 is fixed on the pressing block 9, and the inclination angle of the pressing sheet is consistent with that of the upper end of the clamp spring 6. The minimum distance between the two pressing sheets 11 is smaller than the width of the elastic limiting sheet 23, so that the pressing sheet 9 can simultaneously press the elastic limiting sheet 23 downwards in the downward moving process.
When the fuse 2 needs to be replaced, the pressing block 9 is pressed downwards and compresses the compression spring 10, the pressing sheet 11 moves downwards along with the pressing sheet to prop the clamp spring 6 open, the fixing sheet 16 slides on the inner side wall of the clamp spring 6, so that necking of the clamp spring 6 is propped open, meanwhile, the elastic limiting sheet 23 is pressed downwards, and the axial force of the elastic limiting sheet 23 on the left sleeve ring 13 is removed; the pretightning force of spring conducting strip 17 this moment rebounds right lantern ring 14, makes fuse 2 auto-eject, can change fuse 2 for the change of fuse 2 is more simple and convenient. In addition, when the pressure acting on the pressing block 9 disappears, the pressing block 9 is reset through the elasticity of the compression spring 10.
Furthermore, the telescopic device also comprises a telescopic plate 12, and two ends of the telescopic plate 12 are fixedly connected with a left lantern ring 13 and a right lantern ring 14. Namely, a horizontal plate is fixed on the side of the fuse 2; the telescopic plate 12 can be freely stretched, and when the telescopic plate is completely stretched, the shortest distance between the left lantern ring 13 and the right lantern ring 14 is greater than the length of the fuse 2, so that the fuse 2 can be conveniently inserted into the left lantern ring 13 and the right lantern ring 14; when the fuse 2 is contracted, the shortest distance between the left sleeve ring 13 and the right sleeve ring 14 is smaller than the shortest distance length of the two conductive rings of the fuse 2, so that the conductive rings of the fuse 2 can be inserted into the left sleeve ring 13 and the right sleeve ring 14, the damping effect of the left sleeve ring 13 and the right sleeve ring 14 on the fuse 2 is ensured, and the contact resistance is reduced. About the expansion plate 12 can play certain support to fuse 2 for when the different position vibrations in fuse 2 both ends, expansion plate 12 is given in the unable absorptive moment transmission of fastening spring piece 15 and spring conducting strip 17, and more comprehensive protection fuse 2 improves line protection device's reliability.
Further, a sliding groove 18 is formed in the top of the base 1, a sliding cover plate 19 is adapted to the sliding groove 18, and the height of the sliding cover plate 19 is higher than that of the telescopic plate 12; the side face, opposite to the bottom face of the sliding cover plate 19, of the sliding groove 18 is provided with sealing rubber 20, two ends of the base 1 are provided with threading holes 24, the threading holes 24 are provided with rubber sleeves 22, and the inner diameter of each rubber sleeve 22 is slightly smaller than the wire diameter of each adaptive electric wire. Specifically, a chute 18 is arranged at the position of a base 1 accommodating groove at the upper end of the expansion plate 2, the base 1 accommodating groove can be sealed up through an adaptive sliding cover plate 19 and fixed by corresponding fixing parts (such as screws, pins and the like), and external dust is prevented from entering the circuit protection device; in addition, the sealing rubber 20 seals the gap between the slide cover plate 19 and the slide groove 18. The inner diameter of the rubber sleeve 22 is slightly smaller than the wire diameter of the cable used, so that the gap between the threading holes 24 can be sealed by the cable passing through the rubber sleeve 22. Therefore, the whole line protection device has good waterproof and dustproof performance, and can prevent water vapor from entering the protection device to short circuit the fuse 2 to cause the failure of the cable protection device; therefore, the invention can be installed in the junction box and the control cabinet, and also can be directly installed outdoors, namely in the wire groove at the lower part of the train, the installation place is flexible, and the installation and the maintenance are convenient.
Furthermore, a vent hole 21 is formed in the middle of the sliding cover plate 19, and the vent hole 21 is covered by a waterproof breathable film. That is, the ventilation hole 21 that supplies the fuse 2 to dispel the heat is provided with at the intermediate position of sliding closure 19, the top of fuse 2, then pastes the waterproof ventilative film of one deck at sliding closure 19's upper surface, covers ventilation hole 21 for when line protection device has waterproof, dustproof performance, the heat that produces when can also being circular telegram with fuse 2 distributes away, improves the action accuracy nature of device. The waterproof breathable film is a mature product, and the IP protection grade can reach IP68 grade, such as PUW310G, PUW876 and other types of waterproof breathable films.
Furthermore, one end of the sliding groove 18 penetrates through the end of the base 1, and the other end is closed. Specifically, one end of the slide groove 18 extends to the outer surface of one end of the base 1, penetrating one end of the base 1, and the other end is disposed in the other end of the base 1. Therefore, the sliding cover plate 19 can only slide towards one direction, and the sliding cover plate 19 can be fixed only by arranging a fastening mechanism at the end part penetrating through the base 1, so that the installation and replacement processes of the fuse 2 are simplified, and the installation and replacement efficiency is improved.
Further, a handle 25 is arranged at one end of the sliding cover plate 19 close to the closed end of the sliding chute 18. That is to say, after the sliding cover plate 19 is installed in the sliding groove 18, the handle 25 is fixed at the sliding end of the sliding groove 18 through bolts or welding, on one hand, the sliding cover plate 19 can be prevented from falling off from the sliding groove 18 when the sliding cover plate 19 slides outwards, on the other hand, a good acting point is provided for the sliding cover plate 19, and the sliding operation of the sliding cover plate 19 is facilitated.
Further, the included angle between the elastic limiting piece 23 and the conducting piece 7 is greater than 80 °. It can be understood that, if the included angle between the elastic limiting piece 23 and the conducting strip 7 is too small, the pressure of the left lantern ring 13 on the snap spring 6 to the inward pressure of the fixing piece 16 on the snap spring 6 is too small after the snap spring 6 is snapped in, so that the axial pretightening force of the fuse 2 is too small, and the axial damping effect is not good.
Further, the sealing rubber 20 and the rubber sleeve 22 are made of water-swellable rubber. The known water-swellable rubber can swell when contacting with water vapor; sealing rubber 20 and rubber sleeve 22 are made of water-swellable rubber, so that when water exists in the power supply line protection device for the railway passenger car, sealing rubber 20 and rubber sleeve 22 automatically swell to wrap the cable more tightly, and meanwhile, the supporting force for the sliding cover plate 19 is increased, the waterproof performance of the device is strengthened, and further the failure of the device is prevented.
Claims (9)
1. The utility model provides a railway vehicle power supply line protection device, includes base (1), fuse (2), its characterized in that: the base (1) is cuboid, a containing groove is formed in the middle, mounting holes (3) are formed in the two sides of the containing groove, and a left wiring terminal (4) and a right wiring terminal (5) are respectively fixed at the two ends of the bottom of the containing groove;
a clamp spring (6) is arranged between the left wiring terminal (4) and the right wiring terminal (5), the clamp spring (6) is connected with the left wiring terminal (4) through a conducting strip (7), the clamp spring (6) is in a necking U shape, the bottom of the clamp spring is fixed at the bottom of the accommodating groove, and the side wall of the clamp spring (6) is parallel to the side wall of the base (1);
the fuse protector is characterized by further comprising a left sleeve ring (13) and a right sleeve ring (14), wherein the inner diameters of the left sleeve ring (13) and the right sleeve ring (14) are larger than the outer diameter of a conductive ring of the fuse protector (2), a plurality of fastening spring pieces (15) are uniformly arranged on the inner wall of the left sleeve ring and the right sleeve ring, and the fastening spring pieces are respectively sleeved outside the conductive rings at the two ends of the fuse protector (;
the left lantern ring (13) is provided with two fixing pieces (16), the two fixing pieces (16) form an inverted V shape, and the fixing pieces (16) are in sliding fit with the lower end of the inner side of the clamp spring (6); the right lantern ring (14) is connected with the right binding post (5) through a spring conducting strip (17);
an elastic limiting piece (23) is further fixed on the end, connected with the clamp spring (6), of the conducting piece (7), and the elastic limiting piece (23) inclines towards the conducting piece (7).
2. The railway passenger car power supply line protection device of claim 1, wherein: the conducting strip (7) is trapezoidal, a guide rod (8) is arranged in the middle of the conducting strip, a pressing block (9) is sleeved on the guide rod (8), and a compression spring (10) is arranged between the pressing block (9) and the conducting strip (7);
the clamp spring limiting device is characterized in that one side, close to the clamp spring (6), of the pressing block (9) is provided with two pressing sheets (11), the pressing sheets (11) are located between the upper end of the inner side of the clamp spring (6) and the left sleeve ring (13) and are in sliding fit with the clamp spring (6), and the minimum distance between the two pressing sheets (11) is smaller than the width of the elastic limiting sheet (23).
3. The railway passenger car power supply line protection device of claim 2, wherein: the telescopic device is characterized by further comprising a telescopic plate (12), wherein two ends of the telescopic plate (12) are fixedly connected with a left sleeve ring (13) and a right sleeve ring (14) respectively.
4. The railway passenger car power supply line protection device of claim 3, wherein: a sliding groove (18) is formed in the top of the base (1), a sliding cover plate (19) is matched with the sliding groove (18), and the height of the sliding cover plate (19) is higher than that of the telescopic plate (12);
the side that spout (18) and sliding closure (19) bottom surface are relative is provided with sealing rubber (20), base (1) both ends are provided with through wires hole (24), through wires hole (24) are equipped with rubber sleeve (22), the internal diameter of rubber sleeve (22) slightly is less than the line footpath of adaptation electric wire.
5. The railway passenger car power supply line protection device of claim 4, wherein: a ventilation hole (21) is formed in the middle of the sliding cover plate (19), and the ventilation hole (21) is covered by a waterproof breathable film.
6. The railway passenger car power supply line protection device of claim 5, wherein: one end of the sliding groove (18) penetrates through the end part of the base (1), and the other end of the sliding groove is closed.
7. The railway passenger car power supply line protection device as claimed in any one of claims 4 to 6, wherein: and a handle (25) is arranged at one end of the sliding cover plate (19) close to the closed end of the sliding chute (18).
8. The railway passenger car power supply line protection device of any one of claims 1 to 6, wherein: the included angle between the elastic limiting piece (23) and the conducting piece (7) is larger than 80 degrees.
9. The railway passenger car power supply line protection device of claim 7, wherein: the sealing rubber (20) and the rubber sleeve (22) are made of water-swelling rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810986086.8A CN109263476B (en) | 2018-08-28 | 2018-08-28 | Power supply line protection device for railway passenger car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810986086.8A CN109263476B (en) | 2018-08-28 | 2018-08-28 | Power supply line protection device for railway passenger car |
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| Publication Number | Publication Date |
|---|---|
| CN109263476A CN109263476A (en) | 2019-01-25 |
| CN109263476B true CN109263476B (en) | 2020-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810986086.8A Active CN109263476B (en) | 2018-08-28 | 2018-08-28 | Power supply line protection device for railway passenger car |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110379687B (en) * | 2019-08-08 | 2021-04-09 | 黄山泰客轨道电气有限公司 | Fuse installation device |
| WO2021056157A1 (en) | 2019-09-23 | 2021-04-01 | 深圳市大疆创新科技有限公司 | Adjustment structure and adjustment method therefor, seal, coaxial line, gimbal and movable device |
| CN112319520A (en) * | 2020-10-16 | 2021-02-05 | 中车唐山机车车辆有限公司 | Rail vehicle circuit and rail vehicle |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0765691A (en) * | 1993-08-30 | 1995-03-10 | Sony Corp | Fuse holder |
| US5700165A (en) * | 1995-12-11 | 1997-12-23 | General Motors Corporation | Fused high ampacity electrical quick disconnect |
| KR19990001792A (en) * | 1997-06-17 | 1999-01-15 | 최진호 | Fuse Holder for Vending Machine |
| CN201893305U (en) * | 2010-12-14 | 2011-07-06 | 李雪君 | Signal fuse with clamp spring |
| CN202282316U (en) * | 2011-10-26 | 2012-06-20 | 埃泰克汽车电子(芜湖)有限公司 | Fuse tablet structure |
| WO2014071998A1 (en) * | 2012-11-12 | 2014-05-15 | Schurter Ag | Fuse holder for an electrical fuse, fuse apparatus and method |
| CN204885068U (en) * | 2015-08-17 | 2015-12-16 | 国网山东省电力公司菏泽供电公司 | Outdoor type PT fuse of 35kV |
| CN205140919U (en) * | 2015-12-05 | 2016-04-06 | 乐清市金龙电子实业有限公司 | Fuse unit |
| CN205692789U (en) * | 2016-06-02 | 2016-11-16 | 绍兴市科业电器有限公司 | A kind of interchangeable core type fuse |
| CN206412314U (en) * | 2017-02-15 | 2017-08-15 | 福建飞创电子科技有限公司 | A kind of high fuse holder of steadiness |
-
2018
- 2018-08-28 CN CN201810986086.8A patent/CN109263476B/en active Active
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| CN109263476A (en) | 2019-01-25 |
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