CN217159198U - Alternating current power supply junction box based on shielding grounding - Google Patents
Alternating current power supply junction box based on shielding grounding Download PDFInfo
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- CN217159198U CN217159198U CN202220818057.2U CN202220818057U CN217159198U CN 217159198 U CN217159198 U CN 217159198U CN 202220818057 U CN202220818057 U CN 202220818057U CN 217159198 U CN217159198 U CN 217159198U
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Abstract
The utility model relates to a branch box technical field aims at solving the problem that tram power supply equipment is far away from a motor in the prior art, cables need to be arranged through the wall for many times according to the structure of a vehicle body, and the cables are difficult to change if damaged, and provides an alternating current power supply branch box based on shielding grounding, which comprises a box body, wherein a maintenance cover plate and a grounding column are arranged on the box body; the alternating current power supply junction box of the utility model has a small and exquisite and portable box body, and can be arranged at different positions according to different vehicle body brackets; the junction box is high in integration degree, simple in structure, low in cost, good in airtight and water tightness and capable of meeting the requirements of light weight, space limitation and cost reduction design.
Description
Technical Field
The utility model relates to a branch box technical field particularly, relates to an alternating current power supply branch box based on shielding ground connection is used.
Background
With the acceleration of the urbanization process, the population is highly concentrated towards large and medium cities, the demand on rail transit is increased, the rapid development of the tramcar is promoted, and higher requirements on the reliability and maintainability of the tramcar are also provided. For the most common wheel-rail type vehicle in the rail vehicles, the running gear motor is the most important vehicle power, the interference of an alternating current power supply cable to low-voltage signal equipment is large, and 50mm is generally adopted 2 And a shielding cable with the above wire diameter. Because 100% low-floor tram's overall arrangement restriction, power supply unit arranges in the roof, with arrange far away at the walking motor distance of vehicle bottom, and the cable need wear the wall to arrange many times according to body structure, length is longer, in case there is the cable damaged because of accident or ageing, will face the awkward situation that whole cable can not be changed, so will set up the branch box in the middle and carry out the cable and divide absolutely, subdivide original long cable into roof section, guest room section and chassis section, convenient maintenance, some following problems need be considered in the design of branch box:
1. the distribution box should ensure that the cables pass through the car body or other sheet metal parts;
2. the function of grounding, preferably separate grounding, is required so that the alternating current wire shielding layer can be reliably grounded;
3. by 50mm 2 The diameter of the shielding cable with the diameter above is generally more than phi 20mm, the cable is difficult to bend, and the cable is ensured to be straight in the box after wiring under the condition of limited space;
4. the design of the distribution box should have good waterproof sealing measures to ensure the air tightness and the water tightness of the vehicle and meet the protection requirement of IP 65;
5. after the branch box is installed and wired, the problems of accidental water inflow and drainage of condensed water need to be considered;
6. the installation space of the rail vehicle is limited, and the problems of size and light weight are considered to be important.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an alternating current power supply branch box based on shielding ground connection is used to solve tram power supply unit among the prior art and motor distance far away, and the cable need wear the wall to arrange many times according to body construction, if the cable takes place to damage the difficult problem of changing.
The utility model discloses an adopt following technical scheme to realize:
the utility model provides an alternating current power supply junction box based on shielding ground connection usefulness, includes the box, be equipped with on the box and overhaul apron and ground connection post, the inside terminal mounting panel that is equipped with of box, be provided with a plurality of binding post on the terminal mounting panel, the inlet wire cable is connected to binding post's one end, the cable of being qualified for the next round of competitions is connected to binding post's the other end, the junction box can realize that the cable wears the wall to pre-position the cable.
Alternating current power supply branch box can use on multiple wheel rail formula track traffic vehicles such as tram, light rail, make the motor power supply cable link up outside the car in can following the car, this branch box mainly used exchanges the separated time, the separated time of power lines such as specially adapted motor realizes dividing on the motor alternating current power supply line.
Because the tram on the market at present arranges power supply unit in the roof mostly, and is far away with the walking motor distance of arranging at the vehicle bottom, and the cable need wear the wall to arrange many times according to body structure, brings very big difficulty for later maintenance, consequently, generally can set up branch box or disconnected terminal in the suitable position and divide absolutely, divide into different sections with the cable.
Alternating current power supply branch box, the box is small and exquisite light, can install in different positions according to the automobile body support of difference. The junction box can enable the cable to penetrate through the vehicle body or other metal plates to have the function of penetrating through the wall of the cable, and can also be used for installing and pre-positioning the cable, so that installation errors are avoided.
Based on the requirement of the vehicle on electromagnetic shielding, the junction box is provided with the grounding column to provide a grounding point for the alternating current cable with the shielding layer, so that the shielding layer can be grounded nearby, the shielding function is ensured, and the problem of electromagnetic interference generated by the alternating current power supply cable is solved; the grounding point is independently arranged in the box body, so that the shielding layer of the alternating current cable can be independently grounded at the near end and is not shared with other grounding points, and the potential difference generated by the shared grounding point is avoided.
Alternating current power supply branch box have good sealing performance, satisfy IP 65's protection level requirement.
Alternating current power supply branch box integrate the degree height, simple structure, with low costs, airtight water proofness is good, has satisfied lightweight, space limitation and has fallen the requirement of cost design.
As a preferred technical scheme:
the branch box main body is made of SUS 304 materials and is painted, and the branch box main body can adapt to the environment outside a vehicle.
As a preferred technical scheme:
the box body is provided with a wire inlet and a wire outlet, and the centers of the wire inlet, the wire outlet and the wiring port of the wiring terminal are positioned on a straight line.
The cable can be fixed smoothly after entering the box, ensures that the cable can be arranged straightly under the condition of not bearing bending stress.
As a preferable technical scheme:
the number of the wire inlet and the wire outlet is four.
The principle of three-phase four-wire system AC power supply is satisfied.
As a preferred technical scheme:
a steel pipe is arranged at the wire inlet and is used for the wire inlet cable to pass through; and a threaded sleeve is arranged at the outlet and used for the outgoing cable to pass through and position.
The junction box has the cable wall-penetrating function, and meanwhile, the cable can be well installed and pre-positioned, and installation errors are avoided.
As a preferred technical scheme:
the bottom of the box body is provided with a one-way drain valve.
When the branch box accidentally intakes water or condensed water accumulates to a certain amount, the water can be discharged through the one-way drain valve, so that the risk of electrical short circuit is avoided.
As a preferred technical scheme:
and a waterproof rubber strip is arranged between the maintenance cover plate and the box body.
For sealing the distribution box.
As a preferred technical scheme:
the maintenance cover plate is provided with a gasket, the waterproof rubber strip is provided with a through hole for the gasket to pass through, and the gasket is abutted to the box body.
The packing ring is located overhaul the apron with between the box, when guaranteeing that waterproof stripe has reliable compression volume to play waterproof effect, can play the supporting role, guarantee that waterproof stripe can not damaged by excessive extrusion.
As a preferred technical scheme:
the maintenance cover plate is connected with the box body through a bolt, and the bolt penetrates through the gasket.
The bolt connection mode is simple, the disassembly is easy, and the overhaul is convenient;
when the maintenance cover plate and the waterproof rubber strip are tightly attached to the box body, the gasket is always positioned between the maintenance cover plate and the box body, and when the bolt is screwed down, the compression amount of the waterproof rubber strip can be accurately controlled, so that the waterproof rubber strip is prevented from being crushed due to the stress of the bolt.
As a preferred technical scheme:
the gasket can be made of metal.
As a preferred technical scheme:
the waterproof rubber strip can adopt EPDM material with high compression amount.
As a preferred technical scheme:
the washer is welded on the access panel.
As a preferred technical scheme:
the thickness of the waterproof rubber strip is 3-5mm, and the thickness of the gasket is 2-3 mm.
As a preferred technical scheme:
the box top is equipped with the mounting panel, through the mounting panel will be separated time the box and install on the automobile body.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. besides installing the branch terminal, the branch box can have the function of cable through-wall.
2. Four wire inlet and outlet positions are arranged on two sides of the box body, and the requirement for all three-phase four-wire alternating current power supply motors can be met.
3. The grounding point is independently arranged in the box body, so that the shielding layer of the alternating current cable can be independently grounded at the near end and is not shared by other grounding points, the potential difference generated by the shared grounding point is avoided, and the problem of electromagnetic interference generated by the alternating current power supply cable is solved.
4. The centers of the wire inlet, the terminal connection point and the wire outlet of the junction box are positioned on the same straight line, so that the cable is ensured to be flat and straight, and the cable, particularly the high-voltage cable, is not subjected to bending stress.
5. The one-way drain valve is arranged in the tank, so that the short circuit risk caused by accidental water inflow is avoided.
6. The gasket is welded at the bolt fixing point on the maintenance cover plate in advance, after the maintenance cover plate and the waterproof rubber strip are tightly attached to the box body, the gasket is always positioned between the maintenance cover plate and the box body, when the bolt is screwed up, the compression amount of the waterproof rubber strip can be accurately controlled, and the waterproof rubber strip is prevented from being crushed due to the stress of the bolt.
7. The distribution box adopts various airtight and watertight designs, and meets the protection grade of IP 65.
Drawings
Fig. 1 is a schematic structural diagram of an ac power supply distribution box based on shielding grounding.
Fig. 2 is a front view of fig. 1.
Fig. 3 is a left side view of fig. 1.
Fig. 4 is a right side view of fig. 1.
Fig. 5 is a top view of fig. 1.
Fig. 6 is a part explosion diagram of the ac power supply distribution box for shielding and grounding according to the present invention.
Fig. 7 is a schematic plan view of the first access panel of the present invention.
Fig. 8 is a side view of the first access panel of the present invention.
Fig. 9 is an achievement diagram based on after the alternating current supply branch box that shielding ground connection was used was arranged the cable.
Fig. 10 is a schematic structural diagram of the ac power supply distribution box for shielding and grounding according to the present invention, which is mounted on a vehicle.
Icon: the device comprises a box body 1, a first maintenance cover plate 2, a second maintenance cover plate 3, a steel pipe 4, a grounding column 5, a one-way drain valve 6, a threaded sleeve 7, a connecting terminal 8, a terminal mounting plate 9, a mounting plate 10, a first waterproof rubber strip 11, a second waterproof rubber strip 12, a gasket 13, an incoming cable 14, an outgoing cable 15 and a vehicle body 16.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
Example 1
Referring to fig. 1 to 10, the embodiment provides an ac power supply distribution box based on shielding and grounding, which includes a box body 1, two sides of the box body 1 are provided with openings, the openings are provided with detachable access covers, the access covers are used for sealing the openings, and the access covers include a first access cover 2 and a second access cover 3, which are respectively located at the openings on the two sides of the box body 1.
In this embodiment, the distribution box body is made of SUS 304 and painted, which is suitable for the environment outside the vehicle, and the access cover is also made of SUS 304 and installed on the box body 1 using M6x20 bolts and removed during wiring, installation and maintenance.
The inside terminal mounting panel 9 that is equipped with of box 1, be provided with a plurality of binding post 8 on the terminal mounting panel 9, inlet wire cable 14 is connected to binding post 8's one end, outlet wire cable 15 is connected to binding post 8's the other end, the branch box can realize that the cable wears the wall to pre-position the cable.
In this embodiment, a wire inlet has been seted up on one side of box 1, the outlet has been seted up on first access panel 2, the wire inlet with the outlet is located on two relative sides of box 1, the wire inlet, the outlet and the center of binding post 8 wiring mouth is in a straight line for ensure that the cable is straight to be arranged and not receive bending stress.
The number of the wire inlet and the wire outlet is four, and the three-phase four-wire alternating current power supply principle is met.
Every inlet wire department all is provided with one section seamless steel pipe 4, every outlet wire department all is provided with threaded sleeve 7, steel pipe 4 with box 1 welding. The incoming line cable 14 penetrates into the junction box through the steel pipe 4, is connected to the stud type wiring terminal 8 through cold-pressing terminal crimping, and penetrates out after being locked by the threaded sleeve 7. The junction box has the cable wall-penetrating function, and meanwhile, the cable can be well installed and pre-positioned, and installation errors are avoided.
Alternating current power supply branch box can use on multiple wheel rail formula track traffic vehicles such as tram, light rail, this branch box mainly used exchanges the separated time, the separated time of power lines such as specially adapted motor realizes dividing on the motor alternating current power supply line.
Because the tram on the market at present arranges power supply unit in the roof mostly, and is far away with the walking motor distance of arranging at the vehicle bottom, and the cable need wear the wall to arrange many times according to body structure, brings very big difficulty for later maintenance, consequently, generally can set up branch box or disconnected terminal in the suitable position and divide absolutely, divide into different sections with the cable.
Alternating current power supply branch box, the box is small and exquisite light, can install in different positions according to the automobile body support of difference. The junction box can have the function of penetrating the cable through the wall, and can well install and pre-position the cable, so that installation errors are avoided.
Based on the requirement of the vehicle on electromagnetic shielding, the junction box is also provided with a grounding column 5, so that a grounding point is provided for the alternating current cable with the shielding layer, the shielding layer can be grounded nearby, the shielding function is ensured, and the problem of electromagnetic interference generated by the alternating current power supply cable is solved; the grounding point is independently arranged in the box body 1, so that the shielding layer of the alternating current cable can be independently grounded at the near end and is not shared with other grounding points, and the potential difference generated by the shared grounding point is avoided.
The grounding column 5 is made of copper clad aluminum, the surface layer is made of a brass material with high conductivity, good electrical performance and reliable grounding are guaranteed, the center is made of aluminum alloy, and the prefabricated M8 thread is used for connection of a grounding wire and connected with an external grounding point through the grounding wire.
Alternating current power supply branch box integrate the degree height, simple structure, with low costs, airtight water proofness is good, has satisfied lightweight, space limitation and has fallen the requirement of cost design.
Example 2
This example differs from example 1 in that: the bottom of the box body 1 is provided with a one-way drain valve 6, when the junction box accidentally enters water or condensed water accumulates to a certain amount, the water can be discharged through the one-way drain valve 6, and the risk of electrical short circuit is avoided.
Example 3
This example differs from example 1 in that: first maintenance apron 2 with be equipped with first waterproof stripe 11 between the box 1, second maintenance apron 3 with be equipped with second waterproof stripe 12 between the box 1, waterproof stripe is used for sealing the branch line case.
Example 4
This example differs from example 3 in that: the utility model discloses a maintenance cover plate, including maintenance cover plate upper screw hole department, waterproof stripe (first waterproof stripe 11 and second waterproof stripe 12) are equipped with packing ring 13, offer the confession on the waterproof stripe (first waterproof stripe 11 and second waterproof stripe 12) the through-hole that packing ring 13 passes through, packing ring 13 is located maintenance cover plate with between the box 1, packing ring 13 with 1 butt of box ensures to apply the moment of torsion after, waterproof stripe's compression amount is in normal range. The maintenance cover plate is connected with the box body 1 through bolts and rivet nuts, and the bolts penetrate through the gaskets 13.
Preferably, the gasket 13 is made of metal and is welded on the maintenance cover plate; the waterproof rubber strip is made of EPDM materials with high compression capacity.
When the wire dividing box is sealed, the maintenance cover plate and the waterproof rubber strip are tightly attached to the box body 1, the waterproof rubber strip is located between the maintenance cover plate and the box body 1, the gasket 13 is also located between the maintenance cover plate and the box body 1 all the time, and the gasket 13 is hard in texture, so that the waterproof rubber strip can be guaranteed not to be excessively small in distance between the maintenance cover plate and the box body 1, the waterproof rubber strip is guaranteed not to be excessively extruded and damaged, and the waterproof rubber strip is guaranteed to have a reliable compression amount to play a waterproof role. When the bolt is screwed, the compression amount of the waterproof rubber strip can be accurately controlled, and the waterproof rubber strip is prevented from being crushed due to the stress of the bolt.
Preferably, the thickness of the waterproof rubber strip is 3-5mm, and the thickness of the gasket 13 is 2-3 mm.
Example 5
This example differs from example 1 in that: the top of the box body 1 is provided with an installation plate 10, the junction box is hung on the underframe of the vehicle body 16 through the installation plate 10 and bolts, and holes are reserved on the vehicle body 16, so that the steel pipes 4 can be inserted into the vehicle body 16, and the air pressure in the vehicle body 16 is ensured to be the same as that in the junction box. And the sealing design of the branch box ensures that the pressure intensity of the vehicle does not fluctuate violently in the high-speed running process, thereby avoiding causing discomfort to passengers.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides an alternating current supply branch box based on shielding ground connection usefulness which characterized in that:
the wire distribution box is characterized by comprising a box body, wherein an overhauling cover plate and a grounding column are arranged on the box body, a terminal mounting plate is arranged inside the box body, a plurality of wiring terminals are arranged on the terminal mounting plate, one ends of the wiring terminals are connected with wire inlet cables, the other ends of the wiring terminals are connected with wire outlet cables, and the wire distribution box can realize that the cables penetrate through a wall and pre-position the cables.
2. An AC power supply distribution box based on shielding grounding as claimed in claim 1, wherein:
the box body is provided with a wire inlet and a wire outlet, and the centers of the wire inlet, the wire outlet and the wiring port of the wiring terminal are positioned on a straight line.
3. An AC power supply distribution box based on shielding grounding as claimed in claim 2, wherein:
the number of the wire inlet and the wire outlet is four.
4. An AC power supply distribution box based on shielding grounding as claimed in claim 2, wherein:
a steel pipe is arranged at the wire inlet and is used for the wire inlet cable to pass through; and a threaded sleeve is arranged at the outlet and used for the outgoing cable to pass through and position.
5. An AC power supply distribution box based on shielding grounding as claimed in claim 1, wherein:
the bottom of the box body is provided with a one-way drain valve.
6. An AC power supply distribution box based on shielding grounding as claimed in claim 1, wherein:
and a waterproof rubber strip is arranged between the maintenance cover plate and the box body.
7. An AC power supply distribution box based on shielding grounding as claimed in claim 6, wherein:
the maintenance cover plate is provided with a gasket, the waterproof rubber strip is provided with a through hole for the gasket to pass through, and the gasket is abutted to the box body.
8. An AC power distribution box based on shielding grounding as claimed in claim 7, wherein:
the maintenance cover plate is connected with the box body through a bolt, and the bolt penetrates through the gasket.
9. An AC power distribution box based on shielding grounding as claimed in claim 7, wherein:
the thickness of the waterproof rubber strip is 3-5mm, and the thickness of the gasket is 2-3 mm.
10. An ac power distribution box based on shielding grounding as claimed in any one of claims 1 to 9, wherein:
the box top is equipped with the mounting panel, through the mounting panel will be separated time the box and install on the automobile body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220818057.2U CN217159198U (en) | 2022-04-07 | 2022-04-07 | Alternating current power supply junction box based on shielding grounding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220818057.2U CN217159198U (en) | 2022-04-07 | 2022-04-07 | Alternating current power supply junction box based on shielding grounding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217159198U true CN217159198U (en) | 2022-08-09 |
Family
ID=82700230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220818057.2U Active CN217159198U (en) | 2022-04-07 | 2022-04-07 | Alternating current power supply junction box based on shielding grounding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217159198U (en) |
-
2022
- 2022-04-07 CN CN202220818057.2U patent/CN217159198U/en active Active
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