CN108340933B

CN108340933B - Hybrid power rail vehicle

Info

Publication number: CN108340933B
Application number: CN201810128299.7A
Authority: CN
Inventors: 周安德; 李耘茏; 吕志龙; 王永; 付亚娥
Original assignee: CRRC Zhuzhou Locomotive Co Ltd
Current assignee: CRRC Zhuzhou Locomotive Co Ltd
Priority date: 2018-02-08
Filing date: 2018-02-08
Publication date: 2020-03-24
Anticipated expiration: 2038-02-08
Also published as: MY180167A; DE112018006573B4; CN108340933A; WO2019153720A1; DE112018006573T5

Abstract

The invention discloses a hybrid power rail vehicle which comprises a vehicle body, an internal combustion generator set, a super capacitor module, a rectifier and a converter, wherein the internal combustion generator set, the super capacitor module, the rectifier and the converter are used for providing hybrid power for the rail vehicle; at least one ventilation device is arranged inside the vehicle body, the super capacitor module is provided with air inlets with the same number as the ventilation devices, and the air inlets are communicated with the ventilation devices. When the device is overhauled and maintained, maintenance personnel do not need to ascend and ascend auxiliary equipment, and the device can directly enter the bottom of the vehicle body for maintenance, so that the power equipment is extremely convenient to maintain, the maintenance efficiency is improved, and the maintenance cost is reduced. Meanwhile, the ventilation device enables the super capacitor module to achieve good ventilation and heat dissipation. Therefore, the problem of difficulty in equipment maintenance is solved while normal work of the super capacitor is guaranteed.

Description

Hybrid power rail vehicle

Technical Field

The invention relates to the technical field of traffic vehicles, in particular to a hybrid power rail vehicle.

Background

A hybrid rail vehicle refers to a vehicle having more than two power sources. The power source of a hybrid vehicle generally includes an internal combustion engine, a catenary, or a battery pack.

In the prior art, the power combination form of the hybrid vehicle generally comprises a contact network and storage battery energy storage device combined drive, a contact network and internal combustion engine combined drive, or an internal combustion engine and storage battery energy storage device combined drive, while the internal combustion motor train unit with the internal combustion engine and the storage battery in hybrid power supply has high cost and high maintenance cost, and is not used in large quantities. In order to make the initial power supply of the vehicle more complete, the application provides a new power source combination form, namely the combined driving of an internal combustion engine and a super capacitor module energy storage device.

In the prior art, in order to enable power equipment to have a good ventilation and heat dissipation effect, part of the power equipment of a traction vehicle is usually arranged on the roof and in the vehicle, and the super capacitor module energy storage devices sensitive to temperature are arranged on the roof. And because the power equipment of the vehicle driven by the combination of the internal combustion engine and the super capacitor module energy storage device is more, the vehicle needs to be overhauled and maintained frequently, if the arrangement mode in the prior art is adopted, the power equipment is arranged on the roof, so that inconvenience is brought to the overhaul and maintenance work of the equipment, and meanwhile, the maintenance cost is increased.

In summary, how to provide a hybrid rail vehicle convenient for repairing and maintaining power equipment is a problem to be urgently solved by those skilled in the art.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a hybrid rail vehicle, in which a power source of the rail vehicle adopts a hybrid power of an internal combustion engine and a super capacitor module energy storage device, and a power device of the rail vehicle is convenient to overhaul and maintain, so that the maintenance efficiency of the power device can be improved, and the maintenance cost of the power device can be saved.

In order to achieve the above purpose, the invention provides the following technical scheme:

a hybrid power rail vehicle comprises a vehicle body, an internal combustion generator set, a super capacitor module, a rectifier and a converter, wherein the internal combustion generator set, the super capacitor module, the rectifier and the converter are used for providing hybrid power for the rail vehicle; the automobile body is characterized in that at least one ventilation device is arranged inside the automobile body, the super capacitor module is provided with air inlets, the number of the air inlets is the same as that of the ventilation devices, and the air inlets are communicated with the ventilation devices.

Preferably, the ventilation device is arranged on a floor below a passenger room seat of the vehicle body and communicated with the air inlet through a ventilation flange penetrating through the floor, and an upper flange on the ventilation flange, which is used for connecting the ventilation device, has a preset installation distance from the upper surface of the floor.

Preferably, the ventilation device includes a ventilation frame connected to the upper flange, a filter element for filtering impurities in the air flow is disposed around an outer circumference of the ventilation frame, and the ventilation device further includes a protective cover for protecting the filter element, the protective cover is fixed to a top of the ventilation frame and extends downward from the top of the filter element to a bottom of the filter element with a predetermined gap from an outer circumference of the filter element.

Preferably, ventilation unit still including be used for the block ventilation unit with the protective fence in the clearance between the floor, be equipped with the ventilation hole of being convenient for ventilate on the protective fence, the aperture in ventilation hole is greater than the filter screen aperture of filter core.

Preferably, the top periphery of the protective fence is riveted with a nut, the bottom periphery of the protective cover is provided with a mounting hole, and a bolt for connecting the protective fence and the protective cover penetrates through the mounting hole to be connected with the nut in a matched mode.

Preferably, an elastic sealing ring is sleeved at the end part of the air inlet, so that the air inlet is in sealing connection with the lower flange of the ventilation flange.

Preferably, a baffle plate for protecting the elastic sealing ring is arranged on the outer periphery of the lower flange, and the baffle plate protrudes out of the lower surface of the lower flange and extends downwards.

Preferably, two opposite edge beams in the length direction of the vehicle body are provided with first alignment devices for aligning the super capacitor module during installation, and a main box body of the super capacitor module is provided with a second alignment device which is matched and positioned with the first alignment devices.

Preferably, the first aligning device comprises a first lifting lug arranged on the edge beam and a positioning rod vertically penetrating through the first lifting lug; the second aligning device is a second lifting lug which is arranged on the outer wall of the main box body and used for being matched with the positioning rod for limiting.

According to the hybrid power rail vehicle provided by the invention, the internal combustion generator set, the super capacitor module, the rectifier and the converter are all arranged at the bottom of the floor of the vehicle body, so that maintenance personnel do not need to climb and climb during equipment maintenance and repair, and do not need to climb auxiliary equipment, and the maintenance personnel can maintain by directly entering the bottom of the vehicle body, so that part of power equipment is extremely convenient to maintain, therefore, the maintenance time can be saved, the maintenance efficiency is improved, and the maintenance cost is reduced. Simultaneously, this application makes it be linked together with the super capacitor module through set up ventilation unit in automobile body inside to this ventilation problem who has solved the super capacitor module. That is to say, this application is making partial power equipment overhaul maintain convenient the time, fine assurance the ventilation cooling of super capacitor module. Therefore, the problem of difficulty in equipment maintenance is solved while normal work of the super capacitor module is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a particular embodiment of a hybrid rail vehicle provided by the present invention;

FIG. 2 is a first partial schematic illustration of an exemplary embodiment of a hybrid rail vehicle provided in accordance with the present invention;

FIG. 3 is a second partial schematic structural view of an embodiment of the present invention;

FIG. 4 is a schematic view of the structure of a ventilation device according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of a vehicle body floor in an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a super capacitor module according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of the ventilation device and the super capacitor module according to the embodiment of the present invention after being connected.

The reference numerals in fig. 1 to 7 are as follows:

the vehicle comprises a vehicle body 1, a floor 11, a boundary beam 12, an internal combustion generator set 2, a super capacitor module 3, an air inlet 31, a main box 32, a rectifier 4, a current transformer 5, a ventilation device 6, a filter element 61, a protective cover 62, a mounting hole 63, a protective fence 64, a passenger room seat 7, a ventilation flange 8, an upper flange 81 and a lower flange 82.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The core of the invention is to provide a hybrid rail vehicle, and the power equipment of the hybrid rail vehicle is convenient to overhaul and maintain, so that the maintenance efficiency of the power equipment can be improved, and the maintenance cost of the power equipment can be saved.

Referring to fig. 1-7, fig. 1 is a schematic structural diagram of a hybrid rail vehicle according to the present invention; FIG. 2 is a first partial schematic illustration of a vehicle according to the present invention; FIG. 3 is a second partial schematic structural view of a vehicle according to the present invention; FIG. 4 is a schematic view of the structure of the ventilation device provided by the present invention; FIG. 5 is a schematic structural view of a vehicle body floor provided by the present invention; FIG. 6 is a schematic structural diagram of a super capacitor module according to the present invention; fig. 7 is a schematic structural view of the ventilation device and the super capacitor module provided by the present invention after being connected.

The application provides a hybrid power rail vehicle which comprises a vehicle body 1, an internal combustion generator set 2 and a super capacitor module 3 which are used for providing hybrid power for the rail vehicle, a rectifier 4 and a converter 5, wherein the internal combustion generator set 2, the super capacitor module 3, the rectifier 4 and the converter 5 are all arranged at the bottom of a floor 11 of the vehicle body 1; at least one ventilation device 6 is arranged inside the vehicle body 1, the super capacitor module 3 is provided with air inlets 31 with the same number as the ventilation devices, and the air inlets 31 are communicated with the ventilation devices 6.

It should be noted that the hybrid rail vehicle that this application provided mainly used solves the inconvenient problem of power equipment maintenance among the prior art, for this reason, this application all sets up internal combustion generator set 2, super capacitor module 3, rectifier 4 and converter 5 in the bottom on the floor 11 of automobile body 1. By adopting the arrangement mode, when the equipment is overhauled and maintained, maintenance personnel do not need to ascend, auxiliary equipment does not need to ascend, the maintenance personnel directly enter the bottom of the vehicle body 1 for maintenance, and the maintenance is extremely convenient.

It should be noted that, the hybrid rail vehicle provided by the present application does not specifically limit the number of the vehicle bodies 1, the number of the vehicle bodies 1 may be one or at least two, when the number of the vehicle bodies 1 is at least two, all the vehicle bodies 1 may be grouped, and the internal combustion generator set 2, the super capacitor module 3, the rectifier 4 and the converter 5 may be disposed at the bottom of the floor 11 of the vehicle bodies 1 in different groups as required.

Consider the ventilation cooling problem of super capacitor module 3 when setting up the bottom on floor 11, this application is provided with ventilation unit 6 in 1 inside of automobile body, that is, this application passes through ventilation unit 6 and regards as super capacitor module 3's heat dissipation source with the inside cold air of 1 inside of automobile body, inside the cold air of 1 inside of automobile body leads to super capacitor module 3 via air intake 31, make super capacitor module 3 keep its required temperature of work, avoid super capacitor module 3 along with operating time's increase, can not normally work because of the high temperature.

It can be understood that the number of the ventilation devices 6 is the same as that of the air inlets 31, and the ventilation devices 6 correspond to the air inlets 31 one by one when being installed. The more the number of the air inlets 31 and the ventilation devices 6 is, the larger the cooling air volume is, and the designer can determine the number of the air inlets 31 and the ventilation devices 6 according to the cooling air volume required by the super capacitor module 3, in consideration of comprehensive factors such as noise and temperature in the vehicle. Preferably, the number of the air inlets 31 is six, and the six air inlets 31 are divided into two rows and evenly distributed on two opposite sides of the super capacitor module 3 along a direction parallel to the side beam 12 of the vehicle body 1.

It should be noted that the ventilation device 6 may be disposed inside the passenger compartment, and an air duct is disposed on a side wall of the vehicle body 1 and is used for supplying air from the side wall or the top. The ventilation device 6 may also be provided at a non-passenger area or a location where space is more abundant. The specific location of the ventilation device 6 can be designed according to the actual needs.

To sum up, the hybrid rail vehicle that this application provided because internal combustion generator set 2, super capacitor module 3, rectifier 4 and converter 5 all set up in the bottom on the floor 11 of automobile body 1, consequently, when overhaul of equipments and maintenance, do not need the maintainer to climb the height, and do not need the auxiliary assembly that ascends the height, the maintainer directly gets into the automobile body bottom and can maintain for partial power equipment's maintenance is extremely convenient, consequently, can practice thrift maintenance duration, improves maintenance efficiency, thereby reduces cost of maintenance. Simultaneously, this application makes it be linked together with super capacitor module 3 through set up ventilation unit 6 in automobile body 1 inside to this ventilation cooling problem who solves super capacitor module 3. That is to say, this application is making partial power equipment overhaul maintain convenient the time, fine assurance super capacitor module 3's ventilation cooling. Therefore, the problem of difficulty in equipment maintenance is solved while normal work of the super capacitor module 3 is ensured.

In order to make reasonable use of the space inside the passenger compartment, in the above embodiment, the ventilation unit 6 is disposed on the floor 11 below the passenger compartment seat 7 of the vehicle body 1 and communicates with the air inlet 31 through the ventilation flange 8 penetrating the floor 11, and the upper flange 81 of the ventilation flange 8 for connecting the ventilation unit 6 has a predetermined installation distance from the upper surface of the floor 11.

It can be understood that the ventilation device 6 is arranged on the floor 11 below the passenger room seat 7 of the vehicle body 1, so that the internal space of the passenger room can be saved, the influence of the ventilation device 6 on passengers can be reduced, and the passengers in the back row can step on the floor, thereby improving the comfort level of the passengers.

In addition, the floor 11 is provided with a through hole penetrating through the thickness of the floor, the ventilation flange 8 is sleeved in the through hole and extends towards two ends along the thickness direction of the floor 11, the upper flange 81 of the ventilation flange 8 is fixedly connected with the ventilation device 6, in order to meet the space requirements of water resistance and bolt installation, the flange surface of the upper flange 81 and the upper surface of the floor 11 are provided with a preset installation distance, and the specific value of the preset installation distance is set according to actual requirements. In consideration of the smooth air supply of the ventilation device 6, in order to ensure the perpendicularity of the ventilation device 6 and the floor 11, the flange surface of the upper flange 81 is a plane connecting surface, and the bottom of the ventilation device 6 is in fit connection with the flange surface of the upper flange 81.

In view of the simple and easy realization of the specific structure of the ventilation apparatus 6, on the basis of the above-described embodiment, the ventilation apparatus 6 includes the ventilation frame connected to the upper flange 81, the outer periphery of the ventilation frame is provided with the filter element 61 for filtering impurities in the air flow, the ventilation apparatus 6 further includes the shield cap 62 for shielding the filter element 61, the shield cap 62 is fixed to the top of the ventilation frame, and extends downward from the top of the filter element 61 to the bottom of the filter element 61 with a predetermined gap from the outer peripheral portion of the filter element 61.

The filter element 61 is mainly used for filtering fine impurities in the air flow, and the aperture and density of the filter screen of the filter element 61 are set according to actual conditions.

The hood 62 is fixed on the top of the ventilation frame by bolts, the specific shape of the hood 62 is not limited in the present application, and the hood 62 may be a cylindrical hood, or a rectangular hood, or a hemispherical hood, or a conical hood. Preferably, the shield 62 in this embodiment is a trapezoidal mesa-shaped shield, an inner peripheral portion of the trapezoidal mesa-shaped shield surrounds an outer peripheral portion of the filter element 61, and a predetermined gap is provided between the inner peripheral portion of the trapezoidal mesa-shaped shield and the outer peripheral portion of the filter element 61.

It can be understood that the preset gap between the inner periphery of the protective cover 62 and the outer periphery of the filter element 61 is used for ventilation, so that the cold air in the room enters the filter element 61 from the preset gap and further enters the air inlet 31 of the super capacitor module 3. The larger the preset gap is, the larger the ventilation amount is, however, the larger the preset gap is, the larger the occupied space of the ventilation device 6 is, and therefore, the designer can set it according to the actual situation.

It can be known from the above that, in order to facilitate the installation, the bottom of the protection cover 62 has a certain gap with the upper surface of the floor 11, and is used for the installation of the ventilation frame and the upper flange 81, therefore, in order to reduce the noise transmission inside the super capacitor module to the inside of the passenger room, and simultaneously ensure the ventilation effect, on the basis of the above embodiment, the ventilation device 6 further includes the protective fence 64 for blocking the gap between the ventilation device 6 and the floor 11, the protective fence 64 is provided with the ventilation hole convenient for ventilation, and the aperture of the ventilation hole is larger than the filter mesh aperture of the filter element 61.

During operation, the air current gets into inside the protective fence 64 from the ventilation hole to upwards get into the clearance of predetermineeing between protection casing 62 and the filter core 61 through once switching-over, then, the air current secondary switching-over is followed the radial entering filter core 61 of predetermineeing the clearance along filter core 61 in, and the cubic switching-over is in the air intake 31 of entering super capacitor module 3 downwards, and this kind of setting mode has realized that the cubic of air current turns to, thereby has reduced the noise transmission. Preferably, sound absorbing material is affixed to the interior of the enclosure 62 to further reduce noise.

It can be understood that, in order to prevent the filter mesh hole of the filter element 61 from being blocked by the large particle impurities, the hole diameter of the vent hole is larger than that of the filter mesh hole of the filter element 61, so that the vent hole can block the large particle impurities such as the garbage thrown by the passengers at the outside of the protective fence 64 to prevent the filter element 61 from being blocked.

Further, in view of the simple and easy realization of the specific connection manner of the protective fence 64 and the protective hood 62, on the basis of the above-mentioned embodiment, a nut is riveted to the top periphery of the protective fence 64, and a mounting hole 63 is provided to the bottom periphery of the protective hood 62, and a bolt for connecting the protective fence 64 and the protective hood 62 is passed through the mounting hole 63 and is connected with the nut in a fitting manner.

During installation, the top periphery of the protective fence 64 is inserted into the inner side of the bottom periphery of the protective cover 62, so that the nut is aligned with the installation hole 63, and then a bolt matched with the nut penetrates through the installation hole 63 and is screwed into the thread of the nut. The number of the nuts is the same as that of the mounting holes 63, and the distribution of the nuts on the top periphery of the protective fence 64 is the same as that of the mounting holes 63 on the bottom periphery of the protective cover 62, so that the nuts and the mounting holes 63 can be ensured to correspond one to one during mounting.

In view of the sealing problem of the connection between the air inlet 31 and the ventilation flange 8, on the basis of the above embodiment, the end of the air inlet 31 is sleeved with an elastic sealing ring to make the air inlet 31 and the lower flange 82 of the ventilation flange 8 be connected in a sealing manner.

That is to say, after the installation, the lower flange 82 face of the ventilation flange 8 is fitted and pressed on the elastic sealing ring, and the elastic sealing ring exerts a reaction force on the lower flange 82 face under the action of the elastic restoring force of the elastic sealing ring, so that the elastic sealing ring can be tightly fitted with the lower flange 82 face, and the sealing connection between the air inlet 31 and the ventilation flange 8 is ensured.

In order to prolong the service life of the elastic sealing ring, on the basis of the above embodiment, the outer peripheral part of the lower flange 82 is provided with a baffle plate for protecting the elastic sealing ring, and the baffle plate protrudes from the lower surface of the lower flange 82 and extends downwards.

That is, the outer diameter of the lower flange 82 is larger than the outer diameter of the air inlet 31, so that on one hand, assembly errors can be offset, and on the other hand, after the elastic sealing ring is sleeved on the air inlet 31, the baffle plate can surround the outer periphery of the elastic sealing ring, so that the elastic sealing ring is well protected.

In consideration of the problem of convenience in installation of the super capacitor module 3, on the basis of any one of the above embodiments, the two side beams 12 opposite to each other in the length direction of the vehicle body 1 are provided with first aligning devices for aligning when the super capacitor module 3 is installed, and the main tank 32 of the super capacitor module 3 is provided with second aligning devices for positioning in cooperation with the first aligning devices.

That is, when the super capacitor module 3 is installed, the second aligning device is first matched with the first aligning device for positioning, and then the super capacitor module 3 is fixed on the vehicle body 1. Specifically, the boundary beam 12 of the vehicle body 1 is a C-shaped groove structure, and the mounting position of the first alignment device corresponding to the super capacitor module 3 is fixed on the C-shaped groove structure.

In view of the simplicity and easy implementation of the specific structure of the first aligning device and the second aligning device, on the basis of the above embodiments, the first aligning device includes a first lifting lug arranged on the edge beam 12 and a positioning rod vertically penetrating through the first lifting lug; the second aligning device is a second lifting lug which is arranged on the outer wall of the main box body 32 and used for being matched with the positioning rod for limiting.

That is to say, during the installation, when the second lug of super capacitor module 3 aligns the axis of locating lever, namely after making the second lug penetrate the locating lever, explain that super capacitor module 3 has arrived the correct mounted position, at this moment, can adopt the bolt to fix super capacitor module 3 on automobile body 1.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The hybrid rail vehicle provided by the present invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A hybrid power rail vehicle is characterized by comprising a vehicle body (1), an internal combustion generator set (2) and a super capacitor module (3) which are used for providing hybrid power for the rail vehicle, a rectifier (4) and a converter (5), wherein the internal combustion generator set (2), the super capacitor module (3), the rectifier (4) and the converter (5) are all arranged at the bottom of a floor (11) of the vehicle body (1); at least one ventilation device (6) is arranged inside the vehicle body (1), the super capacitor module (3) is provided with air inlets (31) with the same number as the ventilation devices, and the air inlets (31) are communicated with the ventilation devices (6);

the ventilating device (6) is arranged on a floor (11) below a passenger room seat (7) of the vehicle body (1) and communicated with the air inlet (31) through a ventilating flange (8) penetrating through the floor (11), and an upper flange (81) used for connecting the ventilating device (6) and the upper surface of the floor (11) are provided with a preset installation distance.

2. Hybrid rail vehicle according to claim 1, characterized in that the ventilation device (6) comprises a ventilation frame connected to the upper flange (81), the ventilation frame being provided on its outer periphery with a filter element (61) for filtering impurities in the air flow, the ventilation device (6) further comprising a shield (62) for shielding the filter element (61), the shield (62) being fixed to the top of the ventilation frame and extending from the top of the filter element (61) to the bottom of the filter element (61) with a predetermined clearance from the outer periphery of the filter element (61).

3. Hybrid rail vehicle according to claim 2, characterized in that the ventilation device (6) further comprises a protective barrier (64) for blocking a gap between the ventilation device (6) and the floor (11), the protective barrier (64) being provided with ventilation holes for facilitating ventilation, the ventilation holes having a larger aperture than the filter mesh aperture of the filter element (61).

4. The hybrid rail vehicle according to claim 3, wherein a nut is riveted to the top periphery of the protective fence (64), and a mounting hole (63) is formed in the bottom periphery of the protective hood (62), and a bolt for connecting the protective fence (64) and the protective hood (62) is connected with the nut in a matched manner through the mounting hole (63).

5. Hybrid rail vehicle according to claim 1, characterized in that an elastic sealing ring is sleeved on the end of the air inlet opening (31) to connect the air inlet opening (31) with the lower flange (82) of the ventilation flange (8) in a sealing manner.

6. The hybrid rail vehicle according to claim 5, wherein a peripheral portion of the lower flange (82) is provided with a baffle plate for shielding the elastic seal ring, the baffle plate extending downward protruding from a lower surface of the lower flange (82).

7. The hybrid rail vehicle as claimed in any one of claims 1-6, wherein a first aligning device for aligning the super capacitor module (3) during installation is arranged on two side beams (12) opposite to each other in the length direction of the vehicle body (1), and a second aligning device which is matched with the first aligning device for positioning is arranged on a main box body (32) of the super capacitor module (3).

8. The hybrid rail vehicle of claim 7, wherein the first alignment device includes a first lug disposed on the side sill (12) and a locating bar perpendicularly disposed through the first lug; the second aligning device is a second lifting lug which is arranged on the outer wall of the main box body (32) and used for being matched with the positioning rod for limiting.