CN115224647A - Junction box for metro vehicle and method for plugging through hole of metro vehicle - Google Patents

Abstract

The invention provides a junction box for a metro vehicle and a method for plugging a through hole of the metro vehicle, wherein the junction box for the metro vehicle is used for routing and wiring of a cable of a metro and comprises a box body; the guide cylinder is arranged outside the box body, the cable in the box body is communicated to a carriage of the subway through the guide cylinder, and under the condition that the cable penetrates through the guide cylinder, fireproof materials are filled in the guide cylinder; the guide cylinder is connected with the box body through the fixed supporting plate. The junction box for the metro vehicle realizes secondary fixation of plugging materials of cables and cables through the matching of the box body, the guide cylinder and the fixing supporting plate, avoids falling off due to high-speed running, bumping or long-time use and the like of the metro vehicle, and further prolongs the service life and the service cycle; the cooperation of fire-proof material and guide cylinder has promoted fire behavior, has improved the security.

Description

Junction box for metro vehicle and method for plugging through hole of metro vehicle

Technical Field

The application relates to the technical field of rail transit equipment, in particular to a junction box for a metro vehicle and a method for plugging a through hole of the metro vehicle.

Background

At present, with the progress of society and the development of economy, many cities in China have subways, the subways are rapid, large-traffic and electric power traction rail transit built in the cities, trains run on fully closed lines, the lines in a central urban area are basically arranged in underground tunnels, the lines outside the central urban area are generally arranged on viaducts or the ground, the subways are urban rail transit systems covering various underground and overground rights of roads, and are high-density and high-traffic. With the increasing functions of subway trains, the number of elements and equipment in the trains is increased, and therefore some defects and shortcomings of the existing elements and equipment in the trains are reflected.

In the process of running along with a subway vehicle, a plugging material for plugging a cable can fall off along with high-speed running, jolting, long-time use and the like of a train in the conventional junction box, and when the plugging material falls off, the cable is not fixed and is extremely easy to damage, so that accidents such as train stopping and the like are caused; in addition, the existing junction box has poor fireproof performance and is easy to cause safety accidents.

Disclosure of Invention

In view of the above, in order to overcome the defects in the prior art, the invention provides a junction box for a metro vehicle and a method for plugging a through hole of the metro vehicle, which effectively solve the problem that the material for fixing a cable in the conventional junction box is easy to fall off, so that the danger and the fire resistance are poor.

According to a first aspect of the present invention, there is provided a junction box for a metro vehicle for routing and wiring of cables of the metro vehicle, wherein the junction box for the metro vehicle comprises a box body; the guide cylinder is arranged outside the box body, the cable in the box body is communicated to a carriage of the metro vehicle through the guide cylinder, and under the condition that the cable penetrates through the guide cylinder, fireproof materials are filled in the guide cylinder; the guide cylinder is connected with the box body through the fixed supporting plate.

Preferably, a through hole is formed in the guide cylinder, the through hole penetrates through two opposite end faces of the guide cylinder, a first through hole is formed in one side face of the box body, the size of the through hole is the same as that of the first through hole, and one end face where the through hole is located is abutted against one side face where the first through hole is located, so that the cable located in the box body penetrates through the guide cylinder.

Preferably, the surface where one side of the fixing support plate is located is recessed to form an arc-shaped notch, the notches of the two fixing support plates are mutually combined to form a second through hole, and the size of the second through hole is smaller than that of the through hole.

Preferably, a first supporting plate assembly and a second supporting plate assembly are respectively arranged at two ends of the guide cylinder, and the first supporting plate assembly and the second supporting plate assembly are formed by two fixed supporting plates.

Preferably, the first supporting plate assembly located at one side of the guide cylinder close to the box body is arranged in the box body.

Preferably, the guide cylinder is arranged on a first side surface, located in a first direction, of the box body, the box body comprises a mounting plate, the mounting plate is arranged on a second side surface, opposite to the first side surface, of the box body, and the mounting plate is detachably connected with the box body.

Preferably, the box body further has a third side and a fourth side in the second direction and a fifth side and a sixth side in the third direction, the first direction, the second direction and the third direction are perpendicular to each other two by two, and the box body further includes a plurality of lifting lugs, and the plurality of lifting lugs are respectively disposed on the third side and the fourth side.

Preferably, the third side surface is further provided with a third through hole and a fourth through hole, and the fifth side surface is provided with a fifth through hole; the third through hole and the fifth through hole are used for installing a hose connector, and the hose connector is used for branching the cable; and the fourth through hole is used for installing the vehicle end connector.

Preferably, the box body further comprises a first terminal row, a binding rod and a second terminal row, wherein the first terminal row is arranged on one side of the first side surface, which is located inside the box body, and is used for connecting a power cable; the number of the binding rods is multiple, and the binding rods are respectively arranged on one sides, located inside the box body, of the first side face, the fourth side face, the fifth side face and the sixth side face; the number of the second terminal rows is multiple, and the second terminal rows are respectively arranged on one sides, located in the box body, of the first side face and the fourth side face.

According to a second aspect of the present invention, there is provided a method for plugging a through-hole in a subway vehicle, in which a cable is routed and the through-hole is plugged in the subway vehicle using the junction box for a subway vehicle as described above, the method comprising: cleaning the through hole and the surface of the cable; paper adhesive tapes are adhered to the peripheral sides of the through holes and the outer surface of the cable; penetrating the cable into the through hole; filling the fireproof plugging mud into the through hole by using fireproof plugging mud, wrapping the outer peripheral side of the cable when the fireproof plugging mud is filled, and filling the fireproof plugging mud to the center of the through hole from the hole wall of the through hole; filling gaps of the cables and gaps of the fixing support plates with a fireproof sealant; trimming the glue overflow part, and performing a fire prevention test; welding the junction box for the subway vehicle to the subway vehicle.

This junction box for railcar has realized that the secondary of plugging material to cable and cable is fixed through the cooperation of box, guide cylinder and fixed layer board, has avoided because railcar's high speed is gone, jolt or long-time use etc. appear droing, and then has improved life and life cycle, and the fire behavior has been promoted in the cooperation of fire-proof material and guide cylinder, has improved the security.

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 shows a schematic structural view of a junction box for a subway vehicle according to an embodiment of the present invention;

fig. 2 illustrates a bottom view of a junction box for a subway vehicle according to an embodiment of the present invention;

fig. 3 shows a schematic structural view of the inside of a junction box for a subway vehicle according to an embodiment of the present invention;

fig. 4 shows a schematic structural view of still another inside of the junction box for a subway vehicle according to an embodiment of the present invention;

fig. 5 shows a further structural schematic diagram of a junction box for a subway vehicle according to an embodiment of the present invention;

fig. 6 illustrates an exploded view of a guide sleeve of a junction box for a subway vehicle according to an embodiment of the present invention;

fig. 7 shows a schematic structural diagram of a method for plugging a penetrating hole of a subway vehicle according to an embodiment of the present invention.

Reference numerals: 1-a box body; 2-a guide cylinder; 3-a first fixed supporting plate; 4-a second fixed supporting plate; 5-a first side; 6-a second side; 7-a third side; 8-a fourth side; 9-fifth side; 10-sixth side; 11-a lifting lug; 12-a through hole; 13-a first via; 14-a second via; 15-a third via; 16-a fourth via; 17-a fifth via; 18-mounting a frame; 19-mounting a plate; 20-a third fixed supporting plate; 21-a fourth fixed pallet; 22-a wire binding rod; 23-a first terminal row; 24-a second terminal row; 25-a cable; 26-corrugated steel plate; 27-fireproof plugging mud; 28-fire retardant sealant.

Detailed Description

The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, devices, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and/or systems described herein will be apparent to those skilled in the art in view of the disclosure of the present application. For example, the order of operations described herein is merely an example, which is not limited to the order set forth herein, but rather, variations may be made in addition to operations which must occur in a particular order, which will be apparent upon understanding the disclosure of the present application. Moreover, descriptions of features known in the art may be omitted for clarity and conciseness.

The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and/or systems described herein that will be apparent after understanding the disclosure of the present application.

Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on," "connected to," coupled to, "over," or "overlying" another element, it may be directly "on," "connected to," coupled to, "over," or "overlying" the other element, or one or more other elements may be present therebetween. In contrast, when an element is referred to as being "directly on," "directly connected to," directly coupled to, "directly over" or "directly overlying" another element, there may be no intervening elements present.

As used herein, the term "and/or" includes any one of the associated listed items and any combination of any two or more of the items.

Although terms such as "first", "second", and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section referred to in the examples described herein may be termed a second element, component, region, layer or section without departing from the teachings of the examples.

For ease of description, spatial relationship terms such as "above … …", "upper", "below … …" and "lower" may be used herein to describe the relationship of one element to another element as shown in the figures. Such spatial relationship terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "upper" relative to other elements would then be oriented "below" or "lower" relative to the other elements. Thus, the term "above … …" includes both orientations "above … …" and "below … …" depending on the spatial orientation of the device. The device may also be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.

The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. The singular forms also are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" specify the presence of stated features, quantities, operations, elements, components, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and/or combinations thereof.

Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, may be expected. Thus, examples described herein are not limited to the particular shapes shown in the drawings, but include changes in shape that occur during manufacturing.

The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. Further, while the examples described herein have a variety of configurations, other configurations are possible, as will be apparent after understanding the disclosure of the present application.

According to a first aspect of the present invention, there is provided a junction box for a subway vehicle, as shown in fig. 1 to 7, which is used for routing and routing a cable (not shown) of a subway vehicle, the junction box for a subway vehicle including a box body 1, a guide sleeve 2, and a fixing blade.

In the following description, detailed structures of the box body 1, the guide cylinder 2, and the fixing plate of the junction box for a subway vehicle will be described in detail with reference to fig. 1 to 6.

As shown in fig. 1 to 6, in the embodiment, the case 1 may be formed in a rectangular parallelepiped structure made of a metal material such as iron or stainless steel, for example, and an outer surface of the rectangular parallelepiped structure may be subjected to painting anticorrosive treatment. The cuboid structure has six faces, in the embodiment a first 5 and a second 6 side in a first direction, a third 7 and a fourth 8 side in a second direction and a fifth 9 and a sixth 10 side in a third direction, which three are perpendicular to each other two by two. The interior of the rectangular parallelepiped structure is hollow for the arrangement of the below-described binding bars 22, terminal blocks and cables. As shown in fig. 6, in the embodiment, the first side surface 5 is opened with a first through hole 13, and the first through hole 13 may be formed in a rectangular structure, for example, and four corner sides of the rectangular structure are formed with circular arc chamfers, so as to facilitate the threading and arrangement of the cable.

As shown in fig. 1 to 6, in an embodiment, the guide cylinder 2 may be formed in a rectangular parallelepiped structure matched with the first through hole 13, the rectangular parallelepiped structure is formed with circular arc chamfers as four long sides, so as to facilitate wiring and filling of a fireproof sealant, and the guide cylinder 2 may be fixedly connected with the box body 1 by welding. Preferably, the material of the guide cylinder 2 may be the same as the case 1, and the outer surface of the guide cylinder 2 is also painted. It should be noted here that the shape of the guide drum is not limited to the rectangular parallelepiped structure given in the embodiment, but may also be a cylindrical shape or other cubic shapes, and may be specifically selected according to the number of routing wires and the space of the vehicle body, and further, the length of the guide drum may be specifically selected according to the distance from the box 1 to the bottom surface of the subway vehicle, and may be, for example, 20 to 30mm higher than the bottom surface of the subway vehicle for the guide drum 2.

Preferably, in the case where the cable is threaded through the guide cylinder 2, the inside of the guide cylinder 2 is filled with a fireproof material. The cable can be fixedly connected with the guide cylinder 2 through a fireproof material, the fireproof material can be, for example, fireproof sealing mud 27 and fireproof sealant 28 which are described below, the fireproof sealing mud 27 can be, for example, SSP sealing mud of SpecSeal, the fireproof sealant 28 can be, for example, SSS sealant of SpecSeal, the fireproof sealing mud 27 can be covered on the outer peripheral side of the cable in the guide cylinder 2, the fireproof sealing mud 27 is sequentially filled from the side wall of the guide cylinder 2 to the center of the guide cylinder 2, the fireproof sealing mud 27 is ensured to completely fill the interior of the guide cylinder 2, and then the fireproof sealant 28 can be used for filling the gap between the guide cylinder 2 and the cable, so that the fireproof performance of the junction box for the subway vehicle can reach the use standard.

As shown in fig. 6, in the embodiment, the guide cylinder 2 may be formed with a through hole 12 inside, and preferably, the through hole 12 may have the same shape and size as the first through hole 13, thus facilitating the threading and arrangement of the cable.

As shown in fig. 4 and 5, in the embodiment, the number of the fixing plate may be plural, and a plurality of fixing plates may be respectively installed at both ends of the guide cylinder 2. Specifically, the fixing plate may be formed in an approximately boat-shaped structure, and a side of the fixing plate, which faces the center, is depressed to form an arc-shaped notch, so that, when the notches of the two fixing plates face each other, the two notches are fitted to each other to form the second through hole 14, and the size of the second through hole 14 is smaller than the size of the first through hole 13 and the through hole 12. As shown in fig. 4, the third fixing pallet 20 and the fourth fixing pallet 21 may be formed as a first pallet assembly, the first pallet assembly is located inside the case 1, the cable may be penetrated into the inside of the guide cylinder 2 through the second through hole 14, since the diameter of the second through hole 14 is smaller than the through hole 12, the cable located inside the guide cylinder 2 and the fixing material for fixing the cable are chucked inside the guide cylinder 2 by the first pallet assembly, and may not be dropped due to high-speed traveling, bumping or long-time use by the metro vehicle. Preferably, as shown in fig. 5, a second supporting plate assembly is installed at an end of the guide cylinder 2 far from the end of the case 1, and the second supporting plate assembly may include a first fixing supporting plate 3 and a second fixing supporting plate 4, and the first fixing supporting plate 3 and the second fixing supporting plate 4 are folded to each other to form the second through hole 14, that is, the first fixing supporting plate 3 and the second fixing supporting plate 4 are fastened to each other and the third fixing supporting plate 20 and the fourth fixing supporting plate 21 are fastened to each other to form two sections of the second through hole 14 communicated with each other, where the first fixing supporting plate 3 and the second fixing supporting plate 4 are located outside the case 1 and the third fixing supporting plate 20 and the fourth fixing supporting plate 21 are located inside the case 1. The first and second blade assemblies can ensure that the cable and the fixing material inside the guide cylinder 2 cannot easily fall off and fall off. The first supporting plate component and the second supporting plate component can be respectively and fixedly connected with the guide cylinder 2 and the box body 1 in a mode of using fixing bolts, for example.

Preferably, as shown in fig. 2 and 3, in the embodiment, the case 1 further includes a mounting plate 19 mounted to the bottom (i.e., the second side 6) of the case 1. Specifically, the mounting plate 19 is detachably connected to the box 1 through the mounting frame 18 located on the outer peripheral side of the bottom of the box 1, a screw hole is formed in the mounting frame 18, and the mounting plate 19 can be detachably connected through the cooperation of the fixing screw and the screw hole. When using this junction box for railcar, can dismantle set screw earlier, dismantle mounting panel 19, carry out the wiring of cable.

Preferably, as shown in fig. 3 and 4, in the embodiment, the case 1 further includes a binding bar 22 and a terminal block provided inside the case 1. Specifically, the number of the wire rods 22 may be multiple, multiple wire rods 22 may be installed on one side of the first side 5, the third side 7, the fourth side 8, the fifth side 9, and the sixth side 10, which is located inside the box body 1, the installation manner of the wire rods 22 may be, for example, welding, and the like, and the number and the length of the wire rods 22 may be specifically selected according to actual needs. The cable tie rod 22 enables fast and efficient routing of cables. The terminal block may include a first terminal block 23 and a plurality of second terminal blocks 24, the first terminal block 23 and the plurality of second terminal blocks 24 may be mounted on one side of the first side 5 and the fourth side 8, which is located inside the box body 1, the first terminal block 23 and the plurality of second terminal blocks 24 may be mounted in a manner of fixing connection using fixing bolts, for example, the first terminal block 23 is used for connecting a power cable (not shown), that is, a high-current cable, and the second terminal block 24 is used for connecting a control cable (not shown).

Preferably, as shown in fig. 1 and 3, in the embodiment, the third side surface 7 of the box body 1 is provided with a third through hole 15 and a fourth through hole 16, the fifth side surface 9 is provided with a fifth through hole 17, the third through hole 15 and the fifth through hole 17 can be used for installing a nylon hose connector (not shown), the hose connector is used for branching the lower side of the subway vehicle, and the fourth through hole 16 can be used for installing a vehicle end connector (not shown).

Preferably, as shown in fig. 1 to 6, in the embodiment, the box body 1 may further include a lifting lug 11, and the lifting lug 11 may be formed in an L-shaped structure, for example, and the L-shaped structure may be regarded as being formed by combining two plates perpendicular to each other, wherein one plate may be welded to the box body 1, and the other plate is welded to the subway vehicle. The number of the lifting lugs 11 is plural, and in the embodiment, the lifting lugs 11 may be, for example, two lifting lugs 11 formed on the third side 7 and two lifting lugs 11 formed on the fourth side 8, the lifting lugs 11 are used for fixing the box body 1, and the box body 1 may be welded to the subway vehicle through the lifting lugs 11.

The use process of this junction box for railcar does: wear to establish the inside of box 1 through third through-hole 15 and fifth through-hole 17 with the cable, and be connected with the terminal row after fixing through binding rod 22, later wear to establish into guide cylinder 2 with the cable via second through-hole 14 again, and prevent fires and fix the cable through using fixed material for example for the material of fire prevention cotton, fire prevention shutoff mud, fire prevention sealant etc. finally, install first layer board subassembly and second layer board subassembly respectively at the both ends of guide cylinder 2, with cable and fixed material secondary chucking, avoid deviating from. Finally, the guide cylinder 2 is aligned with the installation area of the metro vehicle, and the lifting lug 11 is welded to the bottom surface of the metro vehicle.

This junction box for railcar has realized fixing cable and cable's plugging material's secondary through the cooperation of first layer board subassembly and second layer board subassembly, has avoided because railcar's high speed travel, jolt or long-time use etc. appear droing, and then has improved life and life cycle, and fire behavior has been promoted in the cooperation of fire-proof material and guide 2, has improved the security.

Further, as shown in fig. 7, according to a second aspect of the present invention, there is provided a through-hole plugging method for a metro vehicle, by which a cable 25 in the junction box for a metro vehicle is fixed, and the above junction box for a metro vehicle.

The method for plugging the through hole of the metro vehicle comprises the following steps:

cleaning the surface of the through-hole 12 and the cable 25;

paper adhesive tapes are adhered to the peripheral sides of the through holes 12 and the outer surfaces of the cables 25;

the cable 25 is inserted into the through hole 12;

the fireproof plugging mud 27 is used for filling the fireproof plugging mud 27 into the through hole 12, when the fireproof plugging mud is filled, the outer peripheral side of the cable 25 is wrapped firstly, and then the fireproof plugging mud is filled from the hole wall of the through hole 12 to the center of the through hole 12;

filling gaps of the cables 25 and gaps of the fixing support plates with a fireproof sealant 28;

trimming the glue overflow part, and performing a fire prevention test;

the junction box for the metro vehicle is welded to the metro vehicle.

Specifically, the first step of the method for plugging the through hole of the metro vehicle requires cleaning the box body 1 and the guide cylinder 2 of the junction box for the metro vehicle, and the through hole 12 and the outer surface of the cable 25 can be cleaned by using a cleaning tool such as a non-woven fabric, so that the quality of sealing and fire prevention is prevented from being affected by impurities such as dust.

In the second step, a paper tape is adhered to the peripheral sides of the through-hole 12 and the outer peripheral side of the cable 25 to determine the position and fix the cable preliminarily.

And thirdly, penetrating the cable 25 into the junction box for the metro vehicle, and carrying out wiring and wiring by using the using method of the junction box for the metro vehicle.

And fourthly, using the fireproof plugging mud 27, wherein the fireproof plugging mud 27 can be SSP plugging mud of SpecSeal, for example, when the fireproof plugging mud 27 is used, the fireproof plugging mud 27 is taken down and filled into the through hole 12, specifically, the fireproof plugging mud 27 wraps the cable 25, and then the fireproof plugging mud 27 is used for filling from the hole wall of the through hole 12 to the hole center of the through hole 12, and the complete filling is ensured.

And a fifth step of installing a fixing support plate of the junction box for the metro vehicle, and filling a fire-proof sealant 28 at a gap where the cable 25 and the fixing support plate are installed, wherein the fire-proof sealant 28 may be, for example, SSS sealant of SpecSeal.

And sixthly, correcting the glue overflow position, filling a fireproof sealant 28 in the gap of each cable to ensure that no gap exists, and performing a fireproof test to ensure that the fireproof standard is met.

Seventhly, welding the junction box for the metro vehicle with the metro vehicle (the corrugated steel plate 26 shown in fig. 7 is a bottom plate of the metro vehicle, and the guide cylinder 2 penetrates through the corrugated steel plate 26 and is connected with the inside of the metro vehicle through a cable 25, where it should be noted that, since the models of the metro vehicles are different, the junction box for the metro vehicle may be installed in a correct installation area of the metro vehicle, and the corrugated steel plate 26 is one of embodiments).

It should be noted that, the technology of the method for plugging the penetrating hole of the metro vehicle in specific use, such as a welding method, a filling method or a sealing method, can be specifically selected according to the construction condition of the site, the diameter of the selected cable, and the specific model of the junction box.

The method for plugging the through holes of the metro vehicles can be used for quickly and completely filling and plugging the through holes 12 of the junction box for the metro vehicles, the adopted fireproof plugging mud 27 and the fireproof sealant 28 can be quickly constructed and can meet the fireproof standard, the construction is quick, the operation is simple, the working efficiency is high, the labor cost is reduced, and the economic benefit is improved.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present application, and are used for illustrating the technical solutions of the present application, but not limiting the same, and the scope of the present application is not limited thereto, and although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope disclosed in the present application; such modifications, changes or substitutions do not depart from the spirit and scope of the exemplary embodiments of the present application, and are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A junction box for a subway vehicle for routing and wiring of a cable of the subway vehicle, characterized by comprising:

a box body;

the guide cylinder is arranged outside the box body, the cable in the box body is communicated to a carriage of the metro vehicle through the guide cylinder, and under the condition that the cable penetrates through the guide cylinder, fireproof materials are filled in the guide cylinder;

the guide cylinder is connected with the box body through the fixed supporting plate.

2. A junction box for a metro vehicle according to claim 1, wherein a through hole is formed in the guide tube, the through hole penetrates through two opposite end surfaces of the guide tube, a first through hole is formed in one side surface of the box body, the size of the through hole is the same as that of the first through hole, and one end surface where the through hole is located abuts against one side surface where the first through hole is located, so that the cable located in the box body penetrates through the guide tube.

3. A junction box for a subway vehicle as claimed in claim 2, wherein a face where one side of said fixing plate is located is depressed to form an arc-shaped notch, said notches of said two fixing plates are mutually fitted to form a second through hole, and a size of said second through hole is smaller than a size of said through hole.

4. A junction box for a subway vehicle as claimed in claim 3, wherein a first pallet assembly and a second pallet assembly are respectively provided at both ends of said guide tube, and said first pallet assembly and said second pallet assembly are each formed of two said fixed pallets as a pallet assembly.

5. A junction box for a subway vehicle as claimed in claim 4, wherein said first blade assembly located at a side of said guide drum close to said box body is provided inside said box body.

6. A junction box for a subway vehicle as claimed in claim 2, wherein said guide sleeve is provided on a first side surface of said box body in a first direction, said box body includes a mounting plate provided on a second side surface of said box body opposite to said first side surface in said first direction, said mounting plate being detachably attached to said box body.

7. A junction box for a subway vehicle as claimed in claim 6, wherein said box body further has a third side and a fourth side in a second direction and a fifth side and a sixth side in a third direction, said first direction, said second direction and said third direction are perpendicular to each other two by two, said box body further comprises a plurality of said lifting lugs, said plurality of said lifting lugs being provided on said third side and said fourth side, respectively.

8. The junction box for the metro vehicle as claimed in claim 7, wherein a third through hole and a fourth through hole are further opened on the third side surface, and a fifth through hole is opened on the fifth side surface; the third through hole and the fifth through hole are used for installing a hose connector, and the hose connector is used for branching the cable; and the fourth through hole is used for installing the vehicle end connector.

9. The junction box for a subway vehicle as claimed in claim 7, wherein said box body further comprises a first terminal row, a binding bar and a second terminal row, said first terminal row being provided at one side of said first side surface located inside said box body for connecting a power cable; the number of the binding rods is multiple, and the binding rods are respectively arranged on one sides, located inside the box body, of the first side face, the fourth side face, the fifth side face and the sixth side face; the number of the second terminal rows is multiple, and the multiple second terminal rows are respectively arranged on one sides, located inside the box body, of the first side face and the fourth side face.

10. A method for plugging a through-hole of a metro vehicle, wherein a metro vehicle is wired and the through-hole is plugged by using the junction box for the metro vehicle according to any one of claims 1 to 9, the method comprising:

cleaning the through hole and the surface of the cable;

paper adhesive tapes are adhered to the peripheral sides of the through holes and the outer surface of the cable;

penetrating the cable into the through hole;

filling the fireproof plugging mud into the through hole by using fireproof plugging mud, wrapping the outer peripheral side of the cable when the fireproof plugging mud is filled, and filling the fireproof plugging mud to the center of the through hole from the hole wall of the through hole;

filling gaps of the cables and gaps of the fixing support plates with a fireproof sealant;

trimming the glue overflow part, and performing a fire prevention test;

welding the junction box for the metro vehicle to the metro vehicle.

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