CN116811676A - Power supply body tensioning device and freight station mobile contact net - Google Patents

Abstract

The invention relates to a power supply tensioning device and a freight station mobile contact net, which at least comprise a tension providing device, a power supply, a portal frame and a hanging assembly; the suspension assembly can move left and right on the portal frame to drive the power supply body to be in a working position or a non-working position; the suspension assembly is further capable of moving relative to the mast in the direction of extension of the railway or maintaining a tendency to move relative to the mast in the direction of extension of the railway; the tension providing device is used for driving the suspension assembly to move relative to the portal frame in the extending direction of the railway according to the tightness degree of the power supply body so that the power supply body is in a tensioning state. The problems that the contact line is insufficient in tension, looseness and sinking, the pantograph of the freight train is jacked up and the safety distance is insufficient in the prior art are avoided. The risk of a loose contact wire bowing in the prior art is avoided, the problem of left-right swing of the contact wire is solved, and safety guarantee is provided for lifting and taking electricity of the pantograph.

Description

Power supply body tensioning device and freight station mobile contact net

Technical Field

The invention belongs to the technical field of electrified railway mobile contact networks, and particularly relates to a power supply tensioning device and a freight station mobile contact network.

Background

A railway freight yard is a place where railway freight transportation is linked with other freight transportation means. The freight yard is the place for the start, transfer and termination of the railway freight transportation production process, is directly connected with the departments of national economy, and is the main link of railway freight transportation.

Particularly for a coal loading freight station, the contact line is arranged below the bin in a penetrating way, and when a freight train enters or exits from a freight station, the contact line needs to be moved to the upper part of a railway, so that the pantograph of the freight train can be conveniently lifted to take electricity from the contact line; when the pantograph of the freight train moves out of the loading and unloading area with the freight train, the movable contact line needs to be translated to the side of the railway so as to facilitate the coal loading operation of the silo.

In the existing silo lower mobile contact net, the contact line is easy to loosen in the use process, firstly, due to the fact that the contact line expands with heat and contracts with cold, secondly, the fixing devices of the mobile contact net are easy to loosen at the two ends of the mobile contact net in the use process, the contact line is caused to loosen and sink, and potential safety hazards exist in the use process of the loose and sinking contact net. The loose contact line tension is insufficient, the safety distance is insufficient, accidents are easy to occur, the loose contact line has the risk of bowing and is easy to swing left and right, and when the swinging contact line is positioned at the outer side of the pantograph, poor contact is caused, and electricity cannot be taken. The contact line is a single line, and the loose contact line is impacted by the upper top of the pantograph in the use process, so that the contact line is easy to deform and has potential safety hazards such as bending.

Disclosure of Invention

In view of the above, in order to overcome the defects of the prior art, the invention aims to provide a power supply tensioning device and a freight station mobile contact net, which can effectively tension a contact line under various working conditions even under the condition that the contact line is stretched or shortened due to expansion caused by heat and contraction caused by cold, and overcome a plurality of adverse effects caused by the fact that the contact line cannot be tensioned in the prior art.

In order to achieve the above object, a first aspect of the present invention provides a power supply tensioning device, which is applied to the field of mobile contact networks, and at least includes a tension providing device and a power supply; wherein the method comprises the steps of

The power supply body is partially or completely arranged in a hanging mode;

the tension provided by the tension providing device directly or indirectly acts on the power supply body, and the tension providing device is used for providing tension for the power supply body.

Further, at least comprises a portal and a hanging assembly; wherein the method comprises the steps of

The portal spans the railway, and the suspension assembly is directly or indirectly arranged at the position of a cross beam of the portal; the power supply body is directly or indirectly hung on the hanging component;

the suspension assembly can move left and right on the portal frame to drive the power supply body to be in a working position or a non-working position; the suspension assembly is further capable of moving relative to the mast in the direction of extension of the railway or maintaining a tendency to move relative to the mast in the direction of extension of the railway;

The tension providing device is used for driving the suspension assembly to move relative to the portal frame in the extending direction of the railway according to the tightness degree of the power supply body so that the power supply body is in a tensioning state.

Further, the tension providing device provides a constant tension by adopting a constant tension device, and the tension provided by the constant tension device directly or indirectly acts on the power supply body to tension the power supply body.

Further, the tension providing device adopts a counterweight type tension driving assembly, and the weight provided by the counterweight type tension driving assembly directly or indirectly acts on the suspension assembly to provide tension for the power supply body;

the counterweight tension driving assembly has at least two working states:

first operating state: when the power supply body is loosened or has a tendency of loosening, the height of the counterweight type tension driving assembly is reduced, the gravity of the counterweight type tension driving assembly directly or indirectly acts on the suspension assembly as the tension of the power supply body, and all or part of the suspension assembly is driven to move towards the outer side of the portal frame in the extending direction of the railway so as to tension the power supply body; or alternatively

The second working state: when the power supply body contracts or has a contraction tendency, the power supply body pulls all or part of the suspension assembly to move towards the inner side of the portal frame in the extending direction of the railway, so that the suspension assembly is utilized to drive the counterweight tension driving assembly to ascend.

Further, the suspension assembly comprises at least a lower anchor, more than one insulator and a movable member; the movable piece is directly or indirectly arranged on the cross beam of the portal frame, one end of the insulator is directly or indirectly fixedly arranged on the movable piece, the other end of the insulator is directly or indirectly fixedly arranged on the lower anchor, and the power supply body is directly or indirectly fixedly arranged on the lower anchor.

Further, the tension provided by the weighted tension drive assembly acts directly or indirectly through a pulling member on any viewable area on the moveable member in the suspension assembly.

Further, the device further comprises a first intermediate anchor, wherein the first intermediate anchor is fixedly arranged in any visible area on the movable piece, and the gravity provided by the counterweight type tension driving assembly acts on the first intermediate anchor through the pulling piece as a pulling force.

Further, the device also comprises a counterweight supporting frame which is independently arranged outside the portal frame, wherein the counterweight tension driving assembly is arranged on the counterweight supporting frame, and the counterweight tension driving assembly directly or indirectly acts on the hanging assembly through the pulling piece by taking the gravity of the counterweight tension driving assembly as a pulling force.

Further, the counterweight type tension driving assembly comprises a balance weight assembly and a steering wheel group; wherein the method comprises the steps of

One end of the pulling piece directly or indirectly acts on a weight component in the counterweight type tension driving component, and the other end of the pulling piece bypasses the steering wheel group and then directly or indirectly acts on any visible area on the movable piece in the suspension component.

Further, the anti-swing structure is arranged on the counterweight supporting frame which is arranged on the outer side of the portal independently and at least comprises a guide assembly and a sliding piece, the root position of the sliding piece is directly or indirectly arranged on the weight assembly, the sliding piece can ascend or descend along with the weight assembly, and the guide assembly is used for providing ascending or descending movement guide for the sliding piece.

Further, a portal frame is used as a counterweight supporting frame of the counterweight type tension driving assembly, and the counterweight type tension driving assembly is arranged on a cross beam of the portal frame or on a vertical supporting column of the portal frame; the counterweight type tension driving assembly directly or indirectly acts on the suspension assembly through the pulling piece by taking the gravity of the counterweight type tension driving assembly as a pulling force;

the counterweight type tension driving assembly comprises a balance weight assembly and a steering assembly;

one end of the pulling piece directly or indirectly acts on a weight component in the counterweight type tension driving component, and the other end of the pulling piece bypasses the steering component and then directly or indirectly acts on any visible area on the movable piece in the hanging component.

Further, the steering assembly comprises at least a first steering wheel and a second steering wheel, wherein the first steering wheel is arranged above the counterweight tension driving assembly, and the second steering wheel is arranged close to the suspension assembly;

one end of the pulling piece directly or indirectly acts on a weight component in the counterweight tension driving component, and the other end of the pulling piece bypasses the first steering wheel to turn for the first time and then bypasses the second steering wheel to realize the second time and directly or indirectly acts on any visible area on the movable piece in the suspension component.

Further, the device also comprises a moving mechanism, wherein the moving mechanism is used for directly or indirectly driving the suspension assembly to move left and right on the portal so as to drive the power supply body to be in a working position or a non-working position.

Further, a driving mode for driving the moving mechanism to move on the portal beam and a structure mode for realizing relative movement are as follows:

the driving mode for driving the moving mechanism to move on the portal beam adopts the following first or second mode:

first driving method: the device comprises a driving motor and a chain, wherein the driving motor is used for driving the chain to rotate positively and negatively, and the chain is used for driving the moving mechanism to move left and right on a portal beam in a positive and negative rotating way, so that the power supply body is driven to switch between a working position and a non-working position; or alternatively

The second driving mode: any one of a hydraulic pushing device, a pneumatic pushing device or an electric pushing device is adopted to drive the moving mechanism to move left and right on the portal beam, so that the power supply body is driven to switch between a working position and a non-working position;

the structural form for driving the moving mechanism to realize relative movement on the portal beam at least comprises any one of the following:

The first structural configuration to achieve relative movement: the structure of the sliding way is adopted between the moving mechanism and the portal beam, so that the moving mechanism can move left and right on the portal beam after being pushed and pulled by the force;

the second structural configuration for achieving relative movement: the sliding groove structure is used between the moving mechanism and the portal beam, so that the moving mechanism can move left and right on the portal beam after being pushed and pulled by force;

third structural configuration for achieving relative movement: the sliding rail is used between the moving mechanism and the portal beam, so that the moving mechanism can move left and right on the portal beam after being pushed and pulled by force;

fourth structural form for realizing relative movement: the device comprises a plurality of track pulleys, wherein the plurality of track pulleys are directly or indirectly arranged on a moving mechanism, the plurality of track pulleys can move on a portal beam, and the moving mechanism can move on the portal beam through the plurality of track pulleys after being pushed and pulled by force; or alternatively

Fifth structural form for realizing relative movement: the device comprises a plurality of walking rollers, wherein the walking rollers are arranged on a moving mechanism, the walking rollers can move on a portal beam, and the moving mechanism can move on the portal beam through the arranged walking rollers after being pushed and pulled under the stress;

The first driving mode or the second driving mode drives the moving mechanism to move left and right on the portal beam by utilizing any one of the first to fifth structural modes for realizing relative movement.

Further, the device also comprises a fixing component, wherein the fixing component is directly or indirectly fixed on the moving mechanism, the hanging component is directly or indirectly arranged on the fixing component, and the hanging component can move relative to the fixing component after being pulled by force.

Further, the movable structure is used for enabling the hanging assembly to be capable of moving relative to the fixed assembly after being pulled under the force.

Further, the moving structure adopts any one of the following structural forms;

the first structural form: the structure form of the slide way is adopted between the hanging component and the fixed component, so that the hanging component can move relative to the fixed component after being pulled by force;

the second structural form: the structure form of the sliding chute is adopted between the hanging component and the fixing component, so that the hanging component can move relative to the fixing component after being pulled by force;

The third structural form: the structure form of the sliding rail is adopted between the hanging component and the fixing component, so that the hanging component can move relative to the fixing component after being pulled by force;

fourth structural form: the movable part in the suspension assembly can move by utilizing the track pulleys under the condition that the movable part is pulled by force;

fifth structural form: the device comprises a plurality of track pulleys, wherein the track pulleys are directly or indirectly arranged on a suspension assembly, the track pulleys can move on a fixed assembly, and the track pulleys can be driven to move on the fixed assembly under the condition that the suspension assembly is pulled by force; or alternatively

Sixth structural form: the device comprises a plurality of travelling wheels, wherein the travelling wheels are arranged on a fixed assembly or a suspension assembly, and the arranged travelling wheels are utilized to realize the relative movement between the suspension assembly and the fixed assembly.

Further, the railway suspension device further comprises a push-pull assembly and a fixing assembly, wherein one side of the fixing assembly is directly or indirectly fixed on the moving mechanism, the other side of the fixing assembly is directly or indirectly connected with the suspension assembly, the suspension assembly can move relative to the fixing assembly, and the push-pull assembly is used for pushing or pulling the suspension assembly to move relative to the fixing assembly in the extending direction of the railway.

Further, one end of the push-pull component is directly or indirectly connected with the suspension component; the weight of the counterweight type tension driving assembly directly or indirectly acts on the push-pull assembly, and the push-pull assembly moves to drive the suspension assembly to move.

Further, a second intermediate anchor is provided directly or indirectly on the push-pull assembly, and the weight provided by the counterweight tension drive assembly acts directly or indirectly on the second intermediate anchor.

Further, the tension providing device adopts any one of the following forms:

first kind: the tension providing device adopts an electric pulling device, and the force output by the electric pulling device directly or indirectly acts on the power supply body to tension the power supply body;

second kind: the tension providing device adopts a hydraulic push-pull device, and the force output by the hydraulic push-pull device directly or indirectly acts on the power supply body to tension the power supply body;

third kind: the tension providing device adopts a pneumatic push-pull device, and the force output by the pneumatic push-pull device directly or indirectly acts on the power supply body to tension the power supply body.

The invention also provides a freight station movable contact net, which is provided with at least a first portal frame and a second portal frame, wherein

The power supply tensioning device is arranged at the first door frame or the second door frame; or alternatively

The power supply tensioning device is arranged at the first portal and the second portal.

Further, the first portal is provided with an anchor feeding device, and the second portal is provided with the power supply tensioning device; one end of the power supply body is fixed on the anchor-falling device of the first portal, the other end of the power supply body is arranged on the suspension assembly, and the power supply body can be in a tensioning state through the arranged tension providing device.

According to the technical scheme, the tension provided by the tension providing device is directly or indirectly acted on the power supply body, and the tension providing device is used for driving the suspension assembly to move relative to the portal frame in the extending direction of the railway according to the tightness degree of the power supply body so that the power supply body is in a tensioning state. The invention has at least the following effects:

can be under various operating modes effectively, even the contact line is because the expansion with heat and contraction with cold causes under the condition that existing contact line extends or shortens, also can effectual tensioning contact line, overcome in the prior art because the contact line can not be by tensioning cause a great deal of adverse effect.

The problem that the current supply body (contact line) is stretched under the condition that the heated wire body is stretched, the tension providing device is used for tensioning the current supply body, and the problems that in the prior art, due to insufficient tension of the current supply body, looseness and sinking, the pantograph of a freight train is jacked up and the safety distance is insufficient are solved.

The risk of a loose contact wire bowing in the prior art is avoided, the problem of left-right swing of the contact wire is solved, and safety guarantee is provided for lifting and taking electricity of the pantograph.

The problem that a loose contact wire is easy to deform and bend due to the fact that the contact wire is impacted by the upper top of a pantograph in the using process in the prior art is solved by effectively tensioning the power supply body.

The problem that the length of a power supply body (contact line) is shortened when the power supply body is cooled is effectively solved, and the power supply body pulls all or part of the suspension assembly to move towards the inner side of the portal in the extending direction of a railway, so that the counterweight type tension driving assembly is driven to ascend by the suspension assembly. The condition that the power supply body deforms the wrist arm due to overload pulling force formed on the wrist arm under the condition of shortening the cooling length is avoided. The service life of the mobile contact net is effectively prolonged.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a first embodiment of the power supply tensioner of the present invention;

FIG. 2 is a schematic diagram of a second embodiment of the power supply tensioner of the present invention;

FIG. 3 is a partial schematic view of the suspension assembly of the present invention;

FIG. 4 is a schematic illustration of the present invention with a first intermediate anchor;

FIG. 5 is a schematic view of the construction of the distal counterweight support frame of the invention;

FIG. 6 is a schematic view of the structure of the present invention utilizing a gantry as a counterweight support frame;

FIG. 7 is a second schematic view of the structure of the present invention using a gantry as a counterweight support frame;

FIG. 8 is a schematic diagram of a mobile catenary station of the present invention;

fig. 9 is a schematic diagram of a mobile catenary of the present invention in a non-operational position.

In the figure: 1. a door frame; 2. a suspension assembly; 21. a lower anchor; 22. an insulator; 23. a movable member; 3. a power supply; 41. a constant tension device; 42. a counterweight tension drive assembly; 5. a first intermediate anchor; 6. a counterweight support frame; 7. a weight assembly; 8. a steering wheel group; 9. a pulling member; 10. an anti-swing structure; 11. a guide assembly; 12. a slider; 13. a first steering wheel; 14. a second steering wheel; 15. a fixing assembly; 16. a second intermediate anchor; 17. a moving mechanism; 18. a push-pull assembly; 19. an anchor setting device; 20. a first portal; 21. and a second portal.

Description of the embodiments

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the invention. Rather, they are merely examples of apparatus consistent with some aspects of the invention as detailed in the accompanying claims.

In the prior art, a spring device is arranged at the place of a portal frame, a contact line is tensioned by adjusting the tightness degree of a spring, and can be tensioned to a normal working state when being initially arranged, but as time goes on, the contact line is easy to loosen in the use process of the mobile contact net, so that the contact line is loosened and sunk, and potential safety hazards exist in the use process of the loosened and sunk contact net. The loose contact line tension is insufficient, the safety distance is insufficient, accidents are easy to occur, the loose contact line has the risk of bowing and is easy to swing left and right, and when the swinging contact line is positioned at the outer side of the pantograph, poor contact is caused, and electricity cannot be taken. Meanwhile, as the contact line is a single line, the loose contact line is easy to deform and bend due to the impact of the upper top of the pantograph in the use process.

Therefore, the design of the spring device is avoided in the technical scheme provided by the embodiment, relatively constant tension is adopted to act on the contact wire, and when the contact wire is stretched by the heat receiving wire, the tension providing device is used for tensioning the power supply body, so that the problems that the power supply body is insufficient in tension, looseness and sinking, the pantograph of the freight train is jacked up and the safety distance is insufficient in the prior art are avoided.

When the length of the power supply body is shortened when the contact line is cooled, the power supply body pulls all or part of the suspension assembly to move towards the inner side of the portal in the extending direction of the railway, so that the suspension assembly is utilized to drive the counterweight tension driving assembly to ascend. The condition that the power supply body deforms the wrist arm due to overload pulling force formed on the wrist arm under the condition of shortening the cooling length is avoided. The service life of the mobile contact net is effectively prolonged.

It should be noted that the influence of thermal expansion and cold shrinkage on the power supply exists at all times, and thermal expansion and cold shrinkage are a main factor, and meanwhile, loosening of the tensioning devices at two ends of the power supply causes the power supply to be unable to be tensioned, which is another factor.

The current supply in this embodiment is understood to be a contact wire, which is a specific form of current supply. In this embodiment, the working position refers to a state that the contact line is located above the railway and the freight train can get electricity, and the non-working position refers to a state that the contact line is located at the side of the railway. In the non-working state, the contact line is positioned at the side of the railway, so that the space above the railway is reserved, and the loading and unloading operation or the maintenance operation and the like of the freight train can be conveniently carried out.

For this purpose, the applicant provides a completely new tensioning device whose working principle of tensioning is quite different from the prior art. The tensioning device provided by the implementation does not belong to the prior art, the prior patent does not disclose the technical points which are the same as or similar to the scheme in the field of railway mobile contact networks at present, and meanwhile, the technical point is not used by people in the current engineering practice. The following is detailed below:

first embodiment:

the first aspect of the present embodiment provides a power supply tensioning device, which is applied to the field of mobile contact networks, and at least includes a tension providing device and a power supply 3; wherein the method comprises the steps of

The power supply body 3 is partially or completely arranged in a hanging manner; the tension provided by the tension providing means acts directly or indirectly on the power supply body 3, and the tension providing means is used for providing tension to the power supply body 3.

It should be noted that in the prior art, two ends of a power supply body 3 (contact line) are respectively connected to a lower anchor device below a portal 1, when the contact line is first installed, two ends of the contact line are respectively installed on the lower anchor devices below the two portals, a spring tensioning device is arranged at the portal position, the contact line is tensioned by the spring tensioning device, but the spring tensioning devices at two sides are easy to loosen in actual working conditions, so that the contact line loosens and sinks, and swing and other phenomena occur.

As is obvious from comparison, in the case of the portal frame provided with the spring tensioning device, when the contact wire is heated by the wire body, the spring device cannot further stretch the contact wire, so that the contact wire loosens, sinks and swings, and the like, and when the contact wire is cooled by the wire body, the tension of the contact wire becomes large, and in such a case, for example, the tension is easy to cause deformation to the anchor devices on two sides or to the tension of an overload formed on a cantilever structure (not shown in the figure) on the upright post. In the first embodiment of the present invention, the tension providing device is directly adopted, and it should be noted that the tension provided by the tension providing device is always applied to the power supply body 3, so that the power supply body 3 can be always tensioned without being influenced by thermal expansion and contraction.

It should be noted that, if the tensile force provided by the tensile force providing device acts on the power supply body in a direct manner, electrical isolation is required by the insulator.

Second embodiment:

as shown in fig. 1, the present example further comprises at least a portal 1 and a hanging assembly 2 on the basis of the first embodiment; wherein the portal 1 spans a railway, and the suspension assembly 2 is directly or indirectly arranged at the beam position of the portal 1; the power supply body 3 is directly or indirectly hung on the hanging assembly 2;

The suspension assembly 2 can move left and right on the portal 1 to drive the power supply body 3 to be in a working position or a non-working position; the suspension assembly 2 is also able to move relative to the mast 1 in the direction of extension of the railway or to maintain a tendency to move relative to the mast 1 in the direction of extension of the railway;

the tension providing device is used for driving the suspension assembly 2 to move relative to the portal 1 in the extending direction of the railway according to the tightness degree of the power supply body 3 so that the power supply body 3 is in a tensioning state.

It should be noted that, it should be noted that the suspension assembly 2 in this embodiment can be driven to move left and right on the gantry 1, which is mainly used to drive the power supply 3 to switch between the working position and the non-working position, and the suspension assembly 2 itself can also move in the extending direction of the railway, which is mainly used to facilitate further pulling of the power supply 3 to move.

As shown in fig. 1, as a preferred embodiment, the tension providing device in this embodiment employs a constant tension device 41 to provide a constant tension, and the tension provided by the constant tension device 41 directly or indirectly acts on the power supply body 3 to tension the power supply body 3. The constant tension device 41 is illustrated as a block only by way of schematic drawing, since the constant tension device 41 is of a large variety.

It should be noted that the tension providing device adopts any one of the following forms:

first kind: the tension providing device adopts an electric pulling device, and the force output by the electric pulling device directly or indirectly acts on the power supply body 3 to tension the power supply body 3;

second kind: the tension providing device adopts a hydraulic push-pull device, and the force output by the hydraulic push-pull device directly or indirectly acts on the power supply body 3 to tension the power supply body 3;

third kind: the tension providing device adopts a pneumatic push-pull device, and the force output by the pneumatic push-pull device directly or indirectly acts on the power supply body 3 to tension the power supply body 3.

It should be noted that, the above-mentioned three ways of providing the tension providing device can provide a relatively constant tension. The tension providing device can further actuate the tensioning wire body under the condition that the contact wire heated wire body is prolonged due to the relatively constant tension provided by the tension providing device, and the contact wire is in a tensioning state after the balance is achieved. For example, in the case of prolonged contact wire heating wire, the electric pulling device rotates forward to further tension the contact wire; the output shaft of the hydraulic push-pull device or the pneumatic push-pull device further extends out of the tensioning contact line; similarly, under the condition that the contact line is shortened by the cold line body, the tension providing device reverses to relax the contact line; the retraction of the output shaft of the hydraulic or pneumatic push-pull allows the contact wire to relax, thereby enabling dynamic tension adjustment of the contact wire.

As shown in fig. 2, another preferred implementation of the tension providing device is provided in this embodiment, where the tension providing device uses a counterweight type tension driving assembly 42, and the weight provided by the counterweight type tension driving assembly 42 directly or indirectly acts on the suspension assembly 2 to provide a tensioning force for the power supply 3;

the weighted tension drive assembly 42 has at least two operating states:

first operating state: when the power supply body 3 loosens or has a tendency to loosen, the height of the counterweight type tension driving assembly 42 is reduced, the gravity of the counterweight type tension driving assembly 42 directly or indirectly acts on the hanging assembly 2 as the pulling force of the power supply body 3, and all or part of the hanging assembly 2 is driven to move towards the outer side of the door frame 1 in the extending direction of a railway so as to tension the power supply body 3; or alternatively

The second working state: when the power supply body 3 contracts or has a tendency to contract, the power supply body 3 pulls all or part of the suspension assembly 2 to move towards the inner side of the portal 1 in the extending direction of the railway, so that the suspension assembly 2 is utilized to drive the counterweight type tension driving assembly to ascend.

It should be noted that, the power supply body 3 in this embodiment may be understood as a contact line, where the power supply body 3 is used to facilitate the power supply to provide kinetic energy for the freight train after the pantograph of the freight train is lifted. Both operating conditions are able to maintain or substantially maintain the current supply 3 in a state of tension which is relatively constant. I.e. when the power supply 3 is relaxed or has a tendency to relax, the power supply 3 is further tensioned by means of the tension providing means; when the power supply 3 contracts or has a tendency to contract, the contracted contact wire can drive the tension providing device to act, compensating for the contraction of the contact wire, so that the contact wire itself is maintained or substantially maintained in a state of tension relative to a constant state.

Similarly, the tendency to relax and the tendency to shrink need to be explained here. The effect of thermal expansion and contraction of the power supply 3 is present at all times, and the power supply 3, which is affected by thermal expansion and contraction, tends to be further elongated or further shortened at any time, relative to a constant state of tension. It is believed that the trend described in this embodiment will be understood by those skilled in the art, and will not be described in detail herein.

As shown in fig. 3, as a preferred embodiment, the suspension assembly 2 in this example includes at least a lower anchor 21, one or more insulators 22, and a movable member 23; the movable member 23 is directly or indirectly arranged on the cross beam of the portal 1, one end of the insulator 22 is directly or indirectly fixedly arranged on the movable member 23, the other end of the insulator 22 is directly or indirectly fixedly arranged on the lower anchor 21, and the power supply body 3 is directly or indirectly fixedly arranged on the lower anchor 21.

As shown in fig. 3, the first tensile force is preferably applied in this embodiment: the tension provided by the weighted tension drive assembly 42 acts directly or indirectly through the pull member 9 on any viewable area on the moveable member 23 in the suspension assembly 2.

As another preferred embodiment, as shown in fig. 4, the second tensile force is applied in this example: also included is a first intermediate anchor 5, said first intermediate anchor 5 being fixedly disposed at any visible area on said movable member 23, the weight provided by said weighted tension drive assembly 42 acting as a pulling force on said first intermediate anchor 5 through the pulling member 9.

Any one of the two pulling force modes can be adopted.

It should be emphasized here that, in order to provide a better tension providing device, the suspension assembly 2 on the beam of the gantry 1 needs to be moved left and right to drive the power supply body 3 to switch between the working position (above the railway) and the non-working position (at the side of the railway), and the suspension assembly 2 needs to bear the tension force during the left and right movement, so as to consider the smooth performance of the movement. The embodiment further includes a counterweight supporting frame 6 independently disposed outside the gantry 1, and it is particularly important to note that the counterweight supporting frame 6 must be disposed at a side of the railway outside the gantry 1, and the gantry 1 and the counterweight supporting frame 6 have a certain distance, which may be 5 meters, 10 meters, and 20 meters, and not limited by specific numerical values, and needs to be determined according to the situation of a specific construction scene. The weight-type tension driving assembly 42 is arranged on the weight supporting frame 6, and the weight-type tension driving assembly 42 directly or indirectly acts on the hanging assembly 2 through the pulling piece 9 by using the gravity of the weight-type tension driving assembly as a pulling force.

As shown in fig. 5, as a preferred embodiment, the weight type tension driving assembly 42 in this embodiment includes a weight assembly 7 and a steering wheel set 8; wherein the method comprises the steps of

One end of the pulling member 9 directly or indirectly acts on the weight assembly 7 in the counterweight tension driving assembly, and the other end of the pulling member 9 bypasses the steering wheel group 8 and directly or indirectly acts on any visible area on the movable member 23 in the suspension assembly 2.

Considering that the mobile contact net is installed outdoors and is greatly influenced by weather factors, such as wind speed is a key factor, for this reason, the counterweight support frame 6 independently arranged on the outer side of the portal 1 is provided with an anti-swing structure 10, the anti-swing structure 10 at least comprises a guide component 11 and a sliding component 12, the root position of the sliding component 12 is directly or indirectly installed on the weight component 7, the sliding component 12 can ascend or descend along with the weight component 7, and the guide component 11 is used for providing ascending or descending movement guidance for the sliding component 12.

As shown in fig. 6, as another preferred embodiment, a gantry 1 is used as a counterweight support frame 6 of the counterweight tension driving assembly in this example, where the counterweight tension driving assembly is disposed on a beam of the gantry 1 or on a vertical support column of the gantry 1; the weight type tension driving assembly directly or indirectly acts on the hanging assembly 2 through the pulling piece 9 by taking the gravity of the weight type tension driving assembly as a pulling force;

The counterweight tension driving assembly 42 comprises a balance weight assembly 7 and a steering assembly;

one end of the pulling member 9 acts directly or indirectly on the weight assembly 7 in the counterweight tension drive assembly, and the other end of the pulling member 9 bypasses the steering assembly and directly or indirectly acts on any visible area on the movable member 23 in the suspension assembly 2.

Preferably, the steering assembly comprises at least a first steering wheel 13 and a second steering wheel 14, the first steering wheel 13 being arranged above the counterweight tension driving assembly, the second steering wheel 14 being arranged close to the suspension assembly 2;

one end of the pulling member 9 directly or indirectly acts on the weight assembly 7 in the counterweight tension driving assembly, and the other end of the pulling member 9 bypasses the first steering wheel 13 and bypasses the second steering wheel 14 after the first steering to realize any visible area directly or indirectly acting on the movable member 23 in the suspension assembly 2 after the second steering.

Of course, the counterweight type tension driving assembly is also arranged on the portal frame, the structure 10 is also provided with an anti-swing structure, the anti-swing structure 10 at least comprises a guide assembly 11 and a sliding piece 12, the root position of the sliding piece 12 is directly or indirectly arranged on the weight assembly 7, the sliding piece 12 can ascend or descend along with the weight assembly 7, and the guide assembly 11 is used for providing ascending or descending movement guide for the sliding piece 12.

The present embodiment further comprises a moving mechanism 17, where the moving mechanism 17 may also be called a moving trolley, and the moving mechanism 17 is used to directly or indirectly drive the suspension assembly 2 to move left and right on the gantry 1 to drive the power supply body 3 to be in a working position or in a non-working position. In this embodiment, the moving mechanism 17 is provided on the beam of the gantry 1. The top of the mast 1 is shown with a cover plate and the moving mechanism 17 is below the cover plate, so that only a schematic view of the trolley at the exposed beam edge is seen, as shown by the position of the reference numeral 17 in fig. 6.

Preferably, in this embodiment, a driving manner for driving the moving mechanism to move on the gantry beam and a structural form for realizing the relative movement are as follows:

the driving mode for driving the moving mechanism to move on the portal beam adopts the following first or second mode:

first driving method: the device comprises a driving motor and a chain, wherein the driving motor is used for driving the chain to rotate positively and negatively, and the chain is used for driving the moving mechanism to move left and right on a portal beam in a positive and negative rotating way, so that the power supply body is driven to switch between a working position and a non-working position; or alternatively

The second driving mode: any one of a hydraulic pushing device, a pneumatic pushing device or an electric pushing device is adopted to drive the moving mechanism to move left and right on the portal beam, so that the power supply body is driven to switch between a working position and a non-working position;

The structural form for driving the moving mechanism to realize relative movement on the portal beam at least comprises any one of the following:

the first structural configuration to achieve relative movement: the structure of the sliding way is adopted between the moving mechanism and the portal beam, so that the moving mechanism can move left and right on the portal beam after being pushed and pulled by the force;

the second structural configuration for achieving relative movement: the sliding groove structure is used between the moving mechanism and the portal beam, so that the moving mechanism can move left and right on the portal beam after being pushed and pulled by force;

third structural configuration for achieving relative movement: the sliding rail is used between the moving mechanism and the portal beam, so that the moving mechanism can move left and right on the portal beam after being pushed and pulled by force;

fourth structural form for realizing relative movement: the device comprises a plurality of track pulleys, wherein the plurality of track pulleys are directly or indirectly arranged on a moving mechanism, the plurality of track pulleys can move on a portal beam, and the moving mechanism can move on the portal beam through the plurality of track pulleys after being pushed and pulled by force; or alternatively

Fifth structural form for realizing relative movement: the device comprises a plurality of walking rollers, wherein the walking rollers are arranged on a moving mechanism, the walking rollers can move on a portal beam, and the moving mechanism can move on the portal beam through the arranged walking rollers after being pushed and pulled under the stress;

The first driving mode or the second driving mode drives the moving mechanism to move left and right on the portal beam by utilizing any one of the first to fifth structural modes for realizing relative movement.

Such as: a slideway and a pushing device are adopted, and the pushing device is used for driving the moving mechanism 17 to move on the slideway to drive the power supply body 3 to switch between a working position and a non-working position; or alternatively

The power supply device comprises a sliding rail and a pushing device, wherein the pushing device is used for driving the moving mechanism 17 to move on the sliding rail to drive the power supply body 3 to switch between a working position and a non-working position.

For example, the portal frame comprises a walking roller, and the first driving mode or the second driving mode is adopted to drive the moving mechanism to move left and right on the portal frame cross beam through the walking roller.

Here, it should be noted that, in this embodiment, the suspension assembly 2 may be directly or indirectly disposed below the moving mechanism 17. The suspension assembly 2 is movable in the direction of extension of the railway relative to the movement mechanism 17 to bring the power supply 3 under tension.

Referring to fig. 6, as a preferred embodiment, the present embodiment further includes a fixing component 15, one side of the fixing component 15 is directly or indirectly fixed on the moving mechanism 17, the suspension component 2 is directly or indirectly disposed on the fixing component 15, and the suspension component 2 can move relative to the fixing component 15 after being pulled by force.

Preferably, a moving structure is also included for enabling the suspension assembly 2 to move relative to the fixed assembly 15 after being pulled under force.

Preferably, the moving structure adopts any one of the following structural forms; it should be noted that, in this embodiment, the moving structure may be a moving structure between the fixed component 15 and the suspension component 2, and of course, the suspension component 2 may be directly or indirectly mounted on the moving mechanism 17 without the fixed component 15, so that the moving structure between the suspension component 2 and the moving mechanism 17 may also adopt a similar arrangement manner as described below. This embodiment is not illustrated in a repeated fashion to avoid brevity. It is only necessary to replace the following "fixed assembly 15" with the "moving mechanism 17" with reference to the following six embodiments.

The first structural form: the structure form of the sliding way is adopted between the hanging component 2 and the fixing component 15, so that the hanging component 2 can move relative to the fixing component 15 after being pulled under the stress;

the second structural form: the structure form of the sliding groove is adopted between the hanging component 2 and the fixing component 15, so that the hanging component 2 can move relative to the fixing component 15 after being pulled under the stress;

The third structural form: the structure of the sliding rail is adopted between the hanging component 2 and the fixed component 15, so that the hanging component 2 can move relative to the fixed component 15 after being pulled under the stress;

fourth structural form: comprising a number of rail pulleys mounted directly or indirectly on the fixed assembly 15, with which the movable element 23 of the suspension assembly 2 can be moved in case of being pulled by force; it should be noted that, in this embodiment, the track pulley is used to generate movement, and one specific implementation manner is as follows: the circumference of the track pulley in the embodiment is provided with an annular groove, and two side edges of the movable piece can be embedded in the annular groove, so that when the movable piece is pulled under the stress, a plurality of track pulleys can rotate, and the track pulleys are utilized to move;

fifth structural form: the device comprises a plurality of track pulleys, wherein the track pulleys are directly or indirectly arranged on a suspension assembly 2, the track pulleys can move on a fixed assembly 15, and the track pulleys can be driven to move on the fixed assembly 15 under the condition that the suspension assembly 2 is pulled by force; or alternatively

Sixth structural form: the device comprises a plurality of travelling wheels, wherein the travelling wheels are arranged on a fixed assembly 15 or a suspension assembly 2, and the arranged travelling wheels are utilized to realize the relative movement between the suspension assembly 2 and the fixed assembly 15.

It should be noted that, as in the first to sixth embodiments, the protection scope of the present invention is defined. The protection scope of the invention is also a slideway, a chute, a slide rail, a track pulley and a travelling wheel.

As shown in fig. 6, as another new implementation manner, the present embodiment further includes a push-pull assembly 18 and a fixing assembly 15, one side of the fixing assembly 15 is directly or indirectly fixed on the moving mechanism 17, the other side of the fixing assembly 15 is directly or indirectly connected with the suspension assembly 2, the suspension assembly 2 can move relative to the fixing assembly 15, and the push-pull assembly 18 is used for pushing or pulling the suspension assembly 2 to move relative to the fixing assembly 15 in the extending direction of the railway.

Preferably, one end of the push-pull assembly 18 is directly or indirectly connected to the suspension assembly 2; the weight of the counter-weight tension drive assembly 42 acts directly or indirectly on the push-pull assembly 18, and the movement of the push-pull assembly 18 moves the suspension assembly 2.

The second intermediate anchor is not illustrated in fig. 6 due to the viewing angle problem, and reference may be made to fig. 7. Preferably, the present embodiment further includes a second intermediate anchor 16, the second intermediate anchor 16 being directly or indirectly disposed on the push-pull assembly 18, the weight provided by the weighted tension drive assembly 42 acting directly or indirectly on the second intermediate anchor.

In this embodiment, the force provided by the tension providing device is directly or indirectly applied to the second intermediate anchoring member 16, then the second intermediate anchoring member drives the push-pull assembly 18 to move, and then the suspension assembly 2 is directly or indirectly pushed or pulled by the push-pull assembly 18 to move, so that the power supply 3 is tensioned.

As shown in fig. 8 and 9, another aspect of the present embodiment further provides a freight yard mobile contact network, where at least a first portal and a second portal are disposed in the mobile contact network, where

The power supply body 3 tensioning device is arranged at the first portal 20 or the second portal 21; or alternatively

The first portal 20 and the second portal 21 are both provided with the power supply body 3 tensioning device.

As shown in fig. 9, in this embodiment, the first portal 20 is provided with the anchor-lowering device 19, and the second portal 21 is provided with the power supply 3 tensioning device; one end of the power supply body 3 is fixed on the anchor-falling device 19 of the first portal frame 20, the other end of the power supply body 3 is arranged on the suspension assembly 2, and the power supply body 3 can be in a tensioning state through the arranged tension providing device.

According to the technical scheme, the tension provided by the tension providing device is directly or indirectly acted on the power supply body 3, and the tension providing device is used for driving the suspension assembly 2 to move relative to the portal frame in the extending direction of the railway according to the tightness degree of the power supply body 3 so that the power supply body 3 is in a tensioning state.

While embodiments of the invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (23)

1. Power supply body overspeed device tensioner is applied to mobile contact net field, its characterized in that: it at least comprises a tension providing device and a power supply body; wherein: the power supply body is partially or completely arranged in a hanging mode; the tension provided by the tension providing device directly or indirectly acts on the power supply body, and the tension providing device is used for providing tension for the power supply body.

2. The power supply tensioning device of claim 1, wherein: at least further comprising a mast and a suspension assembly; wherein: the portal spans the railway, and the suspension assembly is directly or indirectly arranged at the position of a cross beam of the portal; the power supply body is directly or indirectly hung on the hanging component; the suspension assembly can move left and right on the portal frame to drive the power supply body to be in a working position or a non-working position; the suspension assembly is further capable of moving relative to the mast in the direction of extension of the railway or maintaining a tendency to move relative to the mast in the direction of extension of the railway; the tension providing device is used for driving the suspension assembly to move relative to the portal frame in the extending direction of the railway according to the tightness degree of the power supply body so that the power supply body is in a tensioning state.

3. The power supply tensioning device of claim 2, wherein: the tension providing device adopts a constant tension device to provide constant tension, and the tension provided by the constant tension device directly or indirectly acts on the power supply body to tension the power supply body.

4. The power supply tensioning device of claim 2, wherein: the tension providing device adopts a counterweight type tension driving assembly to provide relatively constant gravity as tension, and the weight provided by the counterweight type tension driving assembly directly or indirectly acts on the suspension assembly to provide tension for the power supply body;

the counterweight tension driving assembly has at least two working states:

first operating state: when the power supply body is loosened or has a tendency of loosening, the height of the counterweight type tension driving assembly is reduced, the gravity of the counterweight type tension driving assembly directly or indirectly acts on the suspension assembly as the tension of the power supply body, and all or part of the suspension assembly is driven to move towards the outer side of the portal frame in the extending direction of the railway so as to tension the power supply body; or alternatively

The second working state: when the power supply body contracts or has a contraction tendency, the power supply body pulls all or part of the suspension assembly to move towards the inner side of the portal frame in the extending direction of the railway, so that the suspension assembly is utilized to drive the counterweight tension driving assembly to ascend.

5. The power supply tensioner as in claim 4, wherein: the suspension assembly comprises at least a lower anchor, more than one insulator and a movable piece; the movable piece is directly or indirectly arranged on the cross beam of the portal frame, one end of the insulator is directly or indirectly fixedly arranged on the movable piece, the other end of the insulator is directly or indirectly fixedly arranged on the lower anchor, and the power supply body is directly or indirectly fixedly arranged on the lower anchor.

6. The power supply tensioner of claim 5, wherein: the tension provided by the weighted tension drive assembly acts directly or indirectly through a pulling member on any viewable area on the moveable member in the suspension assembly.

7. The power supply tensioning device of claim 6, wherein: the device further comprises a first middle anchoring piece, wherein the first middle anchoring piece is fixedly arranged in any visible area on the movable piece, and gravity provided by the counterweight type tension driving assembly acts on the first middle anchoring piece through the pulling piece as pulling force.

8. The power supply tensioning device of claim 6 or claim 7, wherein: the device is characterized by further comprising a counterweight supporting frame which is independently arranged outside the portal frame, wherein the counterweight tension driving assembly is arranged on the counterweight supporting frame, and the counterweight tension driving assembly directly or indirectly acts on the hanging assembly through the pulling piece by taking the gravity of the counterweight tension driving assembly as a pulling force.

9. The power supply tensioner as in claim 8, wherein: the counterweight type tension driving assembly comprises a weight assembly and a steering wheel group; wherein the method comprises the steps of

One end of the pulling piece directly or indirectly acts on a weight component in the counterweight type tension driving component, and the other end of the pulling piece bypasses the steering wheel group and then directly or indirectly acts on any visible area on the movable piece in the suspension component.

10. The power supply tensioning device of claim 9, wherein: the anti-swing structure is arranged on the counterweight supporting frame which is arranged outside the portal independently and at least comprises a guide assembly and a sliding piece, the root position of the sliding piece is directly or indirectly arranged on the weight assembly, the sliding piece can ascend or descend along with the weight assembly, and the guide assembly is used for providing ascending or descending movement guide for the sliding piece.

11. The power supply tensioning device of claim 6 or claim 7, wherein: the portal is used as a counterweight supporting frame of the counterweight type tension driving assembly, and the counterweight type tension driving assembly is arranged on a cross beam of the portal or on a vertical supporting column of the portal; the counterweight type tension driving assembly directly or indirectly acts on the suspension assembly through the pulling piece by taking the gravity of the counterweight type tension driving assembly as a pulling force;

The counterweight type tension driving assembly comprises a balance weight assembly and a steering assembly;

one end of the pulling piece directly or indirectly acts on a weight component in the counterweight type tension driving component, and the other end of the pulling piece bypasses the steering component and then directly or indirectly acts on any visible area on the movable piece in the hanging component.

12. The power supply tensioning device of claim 11, wherein: the steering assembly at least comprises a first steering wheel and a second steering wheel, the first steering wheel is arranged above the counterweight tension driving assembly, and the second steering wheel is arranged close to the suspension assembly;

one end of the pulling piece directly or indirectly acts on a weight component in the counterweight tension driving component, and the other end of the pulling piece bypasses the first steering wheel to turn for the first time and then bypasses the second steering wheel to realize the second time and directly or indirectly acts on any visible area on the movable piece in the suspension component.

13. The power supply tensioning device of any one of claims 2 to 7 or claim 9 or claim 10 or claim 12, wherein: the power supply device further comprises a moving mechanism, wherein the moving mechanism is used for directly or indirectly driving the suspension assembly to move left and right on the portal frame to drive the power supply body to be in a working position or a non-working position.

14. The power supply tensioner of claim 13, wherein: the driving mode for driving the moving mechanism to move on the portal beam and the structure mode for realizing the relative movement are as follows:

the driving mode for driving the moving mechanism to move on the portal beam adopts the following first or second mode:

first driving method: the device comprises a driving motor and a chain, wherein the driving motor is used for driving the chain to rotate positively and negatively, and the chain is used for driving the moving mechanism to move left and right on a portal beam in a positive and negative rotating way, so that the power supply body is driven to switch between a working position and a non-working position; or alternatively

The second driving mode: any one of a hydraulic pushing device, a pneumatic pushing device or an electric pushing device is adopted to drive the moving mechanism to move left and right on the portal beam, so that the power supply body is driven to switch between a working position and a non-working position;

the structural form for driving the moving mechanism to realize relative movement on the portal beam at least comprises any one of the following:

the first structural configuration to achieve relative movement: the structure of the sliding way is adopted between the moving mechanism and the portal beam, so that the moving mechanism can move left and right on the portal beam after being pushed and pulled by the force;

The second structural configuration for achieving relative movement: the sliding groove structure is used between the moving mechanism and the portal beam, so that the moving mechanism can move left and right on the portal beam after being pushed and pulled by force;

third structural configuration for achieving relative movement: the sliding rail is used between the moving mechanism and the portal beam, so that the moving mechanism can move left and right on the portal beam after being pushed and pulled by force;

fourth structural form for realizing relative movement: the device comprises a plurality of track pulleys, wherein the plurality of track pulleys are directly or indirectly arranged on a moving mechanism, the plurality of track pulleys can move on a portal beam, and the moving mechanism can move on the portal beam through the plurality of track pulleys after being pushed and pulled by force; or alternatively

Fifth structural form for realizing relative movement: the device comprises a plurality of walking rollers, wherein the walking rollers are arranged on a moving mechanism, the walking rollers can move on a portal beam, and the moving mechanism can move on the portal beam through the arranged walking rollers after being pushed and pulled under the stress;

the first driving mode or the second driving mode drives the moving mechanism to move left and right on the portal beam by utilizing any one of the first to fifth structural modes for realizing relative movement.

15. The power supply tensioner of claim 13, wherein: the device comprises a moving mechanism, a hanging component, a fixing component and a hanging component, wherein the moving mechanism is used for moving the hanging component, the hanging component is directly or indirectly fixed on the moving mechanism, and the hanging component can move relative to the fixing component after being pulled by force.

16. The power supply tensioner of claim 15, wherein: the movable structure is used for enabling the hanging component to be capable of moving relative to the fixed component after being pulled under the force.

17. The power supply tensioner as in claim 16, wherein: the moving structure adopts any one of the following structural forms;

the first structural form: the structure form of the slide way is adopted between the hanging component and the fixed component, so that the hanging component can move relative to the fixed component after being pulled by force;

the second structural form: the structure form of the sliding chute is adopted between the hanging component and the fixing component, so that the hanging component can move relative to the fixing component after being pulled by force;

the third structural form: the structure form of the sliding rail is adopted between the hanging component and the fixing component, so that the hanging component can move relative to the fixing component after being pulled by force;

Fourth structural form: the movable part in the suspension assembly can move by utilizing the track pulleys under the condition that the movable part is pulled by force;

fifth structural form: the device comprises a plurality of track pulleys, wherein the track pulleys are directly or indirectly arranged on a suspension assembly, the track pulleys can move on a fixed assembly, and the track pulleys can be driven to move on the fixed assembly under the condition that the suspension assembly is pulled by force; or alternatively

Sixth structural form: the device comprises a plurality of travelling wheels, wherein the travelling wheels are arranged on a fixed assembly or a suspension assembly, and the arranged travelling wheels are utilized to realize the relative movement between the suspension assembly and the fixed assembly.

18. The power supply tensioner of claim 13, wherein: the railway suspension device further comprises a push-pull assembly and a fixing assembly, wherein one side of the fixing assembly is directly or indirectly fixed on the moving mechanism, the other side of the fixing assembly is directly or indirectly connected with the suspension assembly, the suspension assembly can move relative to the fixing assembly, and the push-pull assembly is used for pushing or pulling the suspension assembly to move relative to the fixing assembly in the extending direction of the railway.

19. The power supply tensioner as in claim 18, wherein: one end of the push-pull component is directly or indirectly connected with the suspension component; the weight of the counterweight type tension driving assembly directly or indirectly acts on the push-pull assembly, and the push-pull assembly moves to drive the suspension assembly to move.

20. The power supply tensioner as in claim 19, wherein: and a second intermediate anchor arranged directly or indirectly on the push-pull assembly, wherein the weight provided by the counterweight tension driving assembly directly or indirectly acts on the second intermediate anchor.

21. A power supply tensioner as claimed in claim 3, wherein: the tension providing device adopts any one of the following forms:

first kind: the tension providing device adopts an electric pulling device, and the force output by the electric pulling device directly or indirectly acts on the power supply body to tension the power supply body;

second kind: the tension providing device adopts a hydraulic push-pull device, and the force output by the hydraulic push-pull device directly or indirectly acts on the power supply body to tension the power supply body;

Third kind: the tension providing device adopts a pneumatic push-pull device, and the force output by the pneumatic push-pull device directly or indirectly acts on the power supply body to tension the power supply body.

22. Freight transportation station movable contact net, its characterized in that: at least a first portal and a second portal are arranged in the mobile contact net, wherein

The power supply tensioning device of any one of claims 1 to 21 being provided at the first portal or the second portal; or alternatively

The power supply tensioning device of any one of claims 1 to 21 is provided at both the first and second door frames.

23. The freight yard mobile catenary of claim 22, wherein: a first portal provided with an anchor device and a second portal provided with a power supply tensioning device according to any one of claims 1 to 21; one end of the power supply body is fixed on the anchor-falling device of the first portal, the other end of the power supply body is arranged on the suspension assembly, and the power supply body can be in a tensioning state through the arranged tension providing device.