CN213269745U

CN213269745U - Expandable door for conveying ultra-long fine-pore steel pipes

Info

Publication number: CN213269745U
Application number: CN202021369060.8U
Authority: CN
Inventors: 张耀文; 王新全; 张启兵; 狄东奎
Original assignee: Baotou Yinhai Machinery Technology Co ltd
Current assignee: Baotou Yinhai Machinery Technology Co ltd
Priority date: 2020-07-14
Filing date: 2020-07-14
Publication date: 2021-05-25
Anticipated expiration: 2030-07-14

Abstract

The utility model discloses an expandable door for transporting ultra-long pore steel pipes, which comprises an inner door leaf and other structures; the device is characterized in that the left end and the right end of the first connecting column are respectively hinged with an outer door leaf and an inner door leaf, the left end and the right end of the second connecting column are respectively hinged with an inner door leaf and an outer door leaf, and the outer door leaf is hinged with the side wall of the transportation channel on the close side; when the upper walls of the inner door leaves on the first connecting column and the second connecting column along the length direction are positioned on the same horizontal line, the inner door leaves on the first connecting column and the second connecting column form a shielding connector structure; the lower ends of the first connecting column and the second connecting column are respectively provided with a driving assembly, a first arc-shaped groove and a second arc-shaped groove are respectively formed below the first connecting column and the second connecting column, the driving assemblies are in sliding fit with the first arc-shaped groove or the second arc-shaped groove, and the first connecting column and the second connecting column are respectively provided with a positioning assembly; the utility model discloses can effectively accomplish to promote gate labour saving and time saving and can open and shut, wholly open and shut the dual mode with the part and combine together.

Description

Expandable door for conveying ultra-long fine-pore steel pipes

Technical Field

The utility model relates to a technical field of door, in particular to transport extensible door of overlength pore class steel pipe.

Background

The ultra-long and thin hole type steel pipe is a round, square and rectangular steel material with a hollow cross section and without a seam on the periphery, is generally used as a pipeline for conveying fluid, and has the advantage that the weight is lighter under the condition that the bending strength and the torsional strength are the same compared with solid steel materials such as round steel and the like, so that the ultra-long and thin hole type steel pipe is an economic cross section steel material and is widely used for manufacturing structural parts and mechanical parts, such as petroleum drill pipes, car transmission shafts, bicycle frames, steel scaffold for building construction tops and the like; at present, in the workshop of an enterprise, in order to avoid the occurrence of potential safety hazards or the leakage of business secrets of the enterprise, a gate needs to be arranged to prevent other non-working personnel from entering the workshop, but because the length of the ultra-long pore steel pipe produced by the existing enterprise for producing the ultra-long pore steel pipe is longer, the ultra-long pore steel pipe can pass through the gate smoothly only by having enough space in the process of transporting the ultra-long pore steel pipe out of the workshop of the enterprise.

In the prior art, in order to adapt to a large-size transportation channel of an enterprise production workshop, a gate adapted to the transportation channel is often designed to be large enough to shield the transportation channel, but the gate is designed to be large-size, so that the following problems exist: firstly, because the large-size gate is heavy in weight, workers often need to consume large physical power to push the heavy gate when pushing the gate, and the gate is time-consuming and labor-consuming, so that the design of the gate which is convenient to open and close and easy to fix is urgently needed; secondly, the existing large-size gate is single in use function, vehicles for transporting ultra-long and thin-hole steel pipes or ordinary short-pipe steel pipes need to move the gate integrally, and therefore great inconvenience is brought to workers.

Disclosure of Invention

An object of the utility model is to provide a transport the door that can extend of overlength aperture class steel pipe, can effectively solve the problem of mentioning in the above-mentioned background art.

The utility model adopts the technical scheme as follows: an expandable door for conveying ultra-long fine-pore steel pipes comprises an inner door leaf, an outer door leaf, a first connecting column and a second connecting column; the left end and the right end of the first connecting column are respectively and rotatably connected with an outer door leaf and an inner door leaf, the left end and the right end of the second connecting column are respectively and rotatably connected with the inner door leaf and the outer door leaf, and the outer door leaf is rotatably connected with the side wall of the near side transportation channel; when the upper walls of the inner door leaves on the first connecting column and the second connecting column along the length direction are positioned on the same horizontal line, the inner door leaves on the first connecting column and the second connecting column are combined to form a shielding connector structure; the lower ends of the first connecting column and the second connecting column are respectively provided with a driving assembly, a first arc-shaped groove and a second arc-shaped groove are respectively formed below the first connecting column and the second connecting column, the first arc-shaped grooves are concentrically arranged on the front side of a hinge joint of the left side wall of the transportation channel and the close end outer door leaf, the first arc-shaped grooves are in sliding adaptation with the driving assemblies at the lower ends of the first connecting column, the second arc-shaped grooves are concentrically arranged on the front side of the hinge joint of the right side wall of the transportation channel and the close end outer door leaf, the second arc-shaped grooves are in sliding adaptation with the driving assemblies at the lower ends of the second connecting column, and the first connecting column and the second connecting column are.

Further, the driving assembly comprises a driving motor, elastic rollers and a rotating shaft, the driving motor is arranged in the first arc-shaped groove or the second arc-shaped groove, the driving motor is electrically connected with a storage battery arranged on the first connecting column or the second connecting column and a controller which is arranged independently, the driving motor is driven by double shafts, and the elastic rollers are respectively and concentrically connected on the double shafts of the driving motor; the end of the elastic roller wheel, which is far away from the driving motor, is concentrically provided with a sliding column, two arc inner side walls of the first arc-shaped groove or the second arc-shaped groove are respectively provided with an arc sliding groove, the sliding column is in sliding fit with the arc sliding groove at the near end, and the elastic roller wheel is in contact fit with the side wall and the lower wall of the first arc-shaped groove at the near end; the upper end of the driving motor is rotatably connected with the lower end of the first connecting column or the second connecting column through a rotating shaft.

Furthermore, a plurality of convex ridges are arranged on the elastic roller.

Further, locating component includes positioning screw, screw thread seat, the horizontal horizontally of screw thread seat sets up in the lower extreme of the wherein arbitrary lateral wall of first spliced pole or second spliced pole, and the upper end of screw thread seat is equipped with the screw rod that is equipped with of the screw hole and the threaded hole mutual adaptation of link up lower extreme on the screw thread seat, screw rod and ground contact adaptation.

Furthermore, the front and back sides of the outer door leaf and the inner door leaf are fixedly connected with air deflectors provided with a plurality of guide grooves, and the windward sides of the air deflectors and the guide grooves are cambered surfaces.

Furthermore, one end of the outer door leaf close to the side wall of the transportation channel is fixedly connected with a lantern ring, and the lantern ring is rotatably sleeved and connected with a hinge rod arranged on the side wall close to the transportation channel; the articulated department of outer door leaf and close side transportation way lateral wall is equipped with and lets a plurality of groups auxiliary wheel group, and auxiliary wheel group includes first drive wheel, second drive wheel, and first drive wheel rotates the cover with the hinge bar and establishes and be connected, and first drive wheel with rotate and locate the second drive wheel meshing transmission on the outer door leaf.

Furthermore, the upper ends of the outer door leaf and the inner door leaf are provided with ventilation holes.

Furthermore, the outer door leaf, the inner door leaf, the first connecting column and the second connecting column are all hollow cavity structures.

Furthermore, solar panel, light are installed to first spliced pole or second spliced pole on, solar panel and battery electricity are connected, and the battery is connected with the light electricity.

Furthermore, the lower end of the inner door leaf is provided with a universal wheel.

The beneficial effects of the utility model reside in that:

the utility model discloses a door leaf, outer door leaf, first spliced pole, second spliced pole and drive assembly, locating component in combining can effectively accomplish to need not the manpower and can drive the gate and remove, labour saving and time saving and degree of automation are high, simultaneously the utility model discloses can effectively accomplish to open and shut, wholly open and shut the dual mode and combine together with the part, all need make the use function diversification of gate with the whole limitation of opening of gate at any time, and then the use of giving the staff brings very big convenience, extension gate life, improvement practicality.

The utility model discloses in, drive assembly adopts the electrically driven mode to replace and has adopted the manpower to promote the mode, has effectively liberated the manpower through automatic mode to a certain extent, has reduced staff's working strength, and then is of value to staff's physical and mental health.

The utility model discloses in, can effectively accomplish through locating component's installation and fix a position the first spliced pole or the second spliced pole that move different positions, avoid under external effort will move the first spliced pole or the second spliced pole of assigned position through drive assembly and take place once more to remove under the condition that drive assembly loses drive power, avoid first spliced pole or the second spliced pole that abrupt external effort made drive assembly and upper end to connect to take place to remove simultaneously, thereby it takes place to swing and causes the damage to drive outer door leaf and interior door leaf.

The utility model is provided with the air deflector and the guide groove, which effectively plays a certain guiding role to the wind, reduces the damage caused by the wind directly blowing to the outer door leaf and the inner door leaf and causing the outer door leaf and the inner door leaf to shake violently; the setting in ventilation hole further avoids the windward side to blow directly and hits on outer door leaf and interior door leaf, avoids causing the acutely rocking of outer door leaf and interior door leaf in the weather of strong wind.

In the utility model, the supporting function of the side wall of the conveying channel to the outer door leaf can be effectively enhanced through the arrangement of the lantern ring, and the stability of the utility model is improved; through being provided with first drive wheel, second drive wheel can effectually guarantee that outer door leaf reduces the resistance when rotating around the hinge bar, thereby it is right to avoid constantly pivoted in-process production a large amount of frictional force of outer door leaf the utility model discloses cause the damage.

The utility model discloses in, outer door leaf, interior door leaf, first spliced pole, second spliced pole are hollow cavity structure, and then have alleviateed on the whole the utility model discloses a weight to avoid adopting heavy solid construction to cause the gate heavy, and then the follow-up installation and the maintenance to the gate of staff of being not convenient for adopt hollow structure also to save the material greatly simultaneously, effectively saved the cost for the enterprise.

The utility model discloses in, be battery powered through solar panel, accord with energy-concerving and environment-protective theory, effectively accomplished to adopt solar energy conversion mechanical energy and then convert the electric energy into, avoid the condition of traditional supply mode power consumption resource to take place.

The utility model discloses in, the setting of universal wheel just plays the effect that the internal door leaf supported when being convenient for interior door leaf remove.

Drawings

Fig. 1 is a schematic view of a front-end three-dimensional structure of the present invention.

Fig. 2 is a schematic view of the side three-dimensional structure of the present invention.

Fig. 3 is a schematic view of a partial three-dimensional structure of the present invention.

Fig. 4 is an assembly structure diagram of the driving assembly and the positioning assembly.

Fig. 5 is a schematic perspective view of the unfolded inner and outer door leaves.

In the figure: the device comprises an inner door leaf 1, an outer door leaf 2, a first connecting column 3, a second connecting column 4, a driving component 5, a driving motor 5-1, an elastic roller wheel 5-2, a rotating shaft 5-3, a first arc-shaped groove 6, a second arc-shaped groove 7, a positioning component 8, a positioning screw rod 8-1, a threaded seat 8-2, a storage battery 9, a convex ridge 10, a sliding column 11, an arc-shaped sliding groove 12, a guide groove 13, an air deflector 14, a lantern ring 15, a hinge rod 16, a first driving wheel 17, a second driving wheel 18, a ventilation hole 19, a solar panel 20, a lighting lamp 21 and a universal wheel 22.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings, which are only used for illustrating the technical solutions of the present invention and are not limited.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention; furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated; thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other; the specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

With reference to fig. 1 to 5, an expandable door for transporting ultra-long fine-pore steel pipes is illustrated, which includes an inner door leaf 1, an outer door leaf 2, a first connecting column 3, and a second connecting column 4; the left end and the right end of the first connecting column 3 are respectively and rotatably connected with an outer door leaf 2 and an inner door leaf 1, the left end and the right end of the second connecting column 4 are respectively and rotatably connected with the inner door leaf 1 and the outer door leaf 2, the outer door leaf 2 on the first connecting column 3 and the second connecting column 4 are respectively and rotatably connected with the left side wall and the right side wall of the transportation channel, the arrangement of the outer door leaf 2 and the inner door leaf 1 can avoid the entry of irrelevant personnel, thereby effectively avoiding the potential safety hazard or the leakage of business secrets of enterprises, the connection between the door leaves is more stable by connecting the inner door leaf 2 and the outer door leaf 2 through the first connecting column 3 and the second connecting column 4, and meanwhile, the situation that the door leaves are too large and are broken under the condition; when the upper walls of the inner door leaves 1 on the first connecting column 3 and the second connecting column 4 in the length direction are positioned at the same horizontal line, the inner door leaves 1 on the first connecting column 3 and the second connecting column 4 are combined to form a shielding connector structure; the lower extreme of first spliced pole 3, second spliced pole 4 all is equipped with drive assembly 5, first arc 6, second arc 7 have been seted up respectively to the below of first spliced pole 3, second spliced pole 4, first arc 6 is arranged with one heart in the pin joint front side of transport passageway left side wall and close end outer door leaf 2, and the drive assembly 5 slip adaptation of first arc 6 and first spliced pole 3 lower extreme, second arc 7 is arranged with one heart in the pin joint front side of transport passageway right side wall and close end outer door leaf 2, and the drive assembly 5 slip adaptation of second arc 7 and second spliced pole 4 lower extreme, all be equipped with locating component 8 on first spliced pole 3, the second spliced pole 4. The utility model discloses a door leaf 1, outer door leaf 2, first spliced pole 3, second spliced pole 4 and drive assembly 5, locating component 8 in combining can effectively accomplish to need not the manpower and can drive the gate and remove, labour saving and time saving and degree of automation are high, simultaneously the utility model discloses can effectively accomplish to open and shut, wholly open and shut two kinds of modes with the part and combine together, all need make the use function diversification of gate with the whole limitation of opening of gate at any time, and then bring very big convenience for staff's use, extension gate life, improvement practicality.

Preferably, the driving assembly 5 comprises a driving motor 5-1, an elastic roller 5-2 and a rotating shaft 5-3, the driving motor 5-1 is arranged in the first arc-shaped groove 6 or the second arc-shaped groove 7, the driving motor 5-1 is electrically connected with a storage battery 9 arranged on the first connecting column 3 or the second connecting column 4 and a separately arranged controller (the controller is in the prior art and is not described herein and not shown in the figure), the driving motor 5-1 is driven by two shafts, the elastic roller 5-2 is concentrically connected to the two shafts of the driving motor 5-1, and a plurality of protruding ribs 10 are arranged on the elastic roller to further enhance the friction force between the walls; the end, far away from the driving motor 5-1, of the elastic roller 5-2 is concentrically welded with a sliding column 11, two arc-shaped inner side walls of the first arc-shaped groove 6 or the second arc-shaped groove 7 are respectively provided with an arc-shaped sliding groove 12, the sliding column 11 is in sliding fit with the arc-shaped sliding groove 12 at the near end, the arc-shaped sliding grooves 12 are arranged to prevent the driving assembly 5 in motion from being separated from the first arc-shaped groove 6 or the second arc-shaped groove 7, the elastic roller 5-2 is in contact fit with the side wall and the lower wall of the first arc-shaped groove 6 at the near end, and under the action of the driving force of the driving assembly 5, the driving assembly 5 is effectively ensured to move in the first arc-shaped groove 6 or the second arc-shaped groove 7 through the; the upper end of the driving motor 5-1 is fixedly connected with a rotating shaft 5-3, and the upper end of the rotating shaft 5-3 is rotatably connected with the lower end of the first connecting column 3 or the second connecting column 4 through a bearing. The drive assembly 5 adopts the electrically driven mode to replace the manpower pushing mode, effectively liberates the manpower through the automatic mode to a certain extent, reduces the working strength of the working personnel, and is beneficial to the physical and mental health of the working personnel.

Preferably, the positioning assembly 8 comprises a positioning screw 8-1 and a threaded seat 8-2, the threaded seat 8-2 is transversely and horizontally arranged at the lower end of any side wall of the first connecting column 3 or the second connecting column 4, the upper end of the threaded seat 8-2 is provided with a threaded hole penetrating through the upper end and the lower end of the threaded seat 8-2, the threaded hole is internally provided with a screw in a mutually matched manner, and the screw is in contact fit with the ground. Can effectively accomplish through locating component 8's installation and fix a position first spliced pole 3 or second spliced pole 4 that moves different positions, avoid under external effort will move the first spliced pole 3 or second spliced pole 4 that assigned position had been moved through drive assembly 5 and take place the removal once more under the condition that drive assembly 5 loses drive power, avoid simultaneously that abrupt external effort makes drive assembly 5 and the first spliced pole 3 or the second spliced pole 4 that the upper end is connected take place to remove, thereby drive outer door leaf 2 and interior door leaf 1 take place to swing and cause the damage.

Preferably, the front and rear sides of the outer door leaf 2 and the inner door leaf 1 are bolted with air deflectors 14 provided with a plurality of guide grooves 13, the windward sides of the air deflectors 14 and the guide grooves 13 are both cambered surfaces, which plays a certain role in guiding the wind, and reduces the damage caused by the direct blowing of the wind on the outer door leaf 2 and the inner door leaf 1 after the wind violently shakes.

Preferably, a lantern ring 15 is welded at one end of the outer door leaf 2 close to the side wall of the transportation channel, the utility model adopts the mode that two lantern rings 15 are welded on the outer door leaf 2, and the lantern rings 15 are rotatably sleeved and connected with a hinge rod 16 arranged on the side wall of the close transportation channel; the upper end and the lower end of the rotary joint of the outer door leaf 2 and the upper end and the lower end of the side wall of the adjacent side transportation channel are respectively provided with a group of auxiliary wheel sets, each auxiliary wheel set comprises a first driving wheel 17 and a second driving wheel 18, the first driving wheels 17 are rotatably sleeved with the hinge rods 16 and are connected, and the first driving wheels 17 are in meshing transmission with the second driving wheels 18 rotatably arranged on the outer door leaf 2. The supporting effect of the side wall of the conveying channel on the outer door leaf 2 can be effectively enhanced through the arrangement of the lantern ring 15, and the stability of the utility model is further improved; through being provided with first drive wheel 17, second drive wheel 18 can effectually guarantee that outer door leaf 2 reduces the resistance when rotating around hinge bar 16, thereby avoids producing a large amount of frictional force right at outer door leaf 2 continuous pivoted in-process the utility model discloses it is right to cause the damage.

Preferably, the upper ends of the outer door leaf 2 and the inner door leaf 1 are both provided with the vent holes 19, so that the direct blowing of the wind blowing from the windward side on the outer door leaf 2 and the inner door leaf 1 is further avoided, and the violent shaking of the outer door leaf 2 and the inner door leaf 1 caused by the weather of strong wind is avoided.

Preferably, outer door leaf 2, interior door leaf 1, first spliced pole 3, second spliced pole 4 are hollow cavity structure, and then have alleviateed on the whole the utility model discloses a weight to avoid adopting bulky solid construction to cause the gate heavy, and then be not convenient for the follow-up installation and the maintenance to the gate of staff, adopt hollow structure also to save the material greatly simultaneously, effectively saved the cost for the enterprise.

Preferably, install solar panel 20, light 21 on first spliced pole 3 or the second spliced pole 4, solar panel 20 is connected with battery 9 electricity, and battery 9 is connected with light 21 electricity, is the power supply of battery 9 through solar panel 20, accords with energy-concerving and environment-protective theory, has effectively accomplished to adopt solar energy conversion mechanical energy and then converts the electric energy into, avoids traditional supply mode power consumption to take place the condition of resource.

Preferably, the lower end of the inner door leaf 1 is provided with a universal wheel 22, so that the inner door leaf 1 can move conveniently and can support the inner door leaf 1.

The working process of the device is as follows: in the first embodiment, when a vehicle for transporting an ultra-long slender steel pipe passes through, a worker manually opens the joint of the inner door leaf 1; then, the worker drives the driving motor 5-1 at the lower end of the first connecting column 3 and the second connecting column 4 to rotate through the controller, the rotating driving motor 5-1 further drives the elastic rollers 5-2 on the driving shafts at the two ends of the driving motor 5-1 to rotate, the rotating elastic rollers 5-2 ensure that the driving component 5 can smoothly pass through the arc-shaped groove under the combined action of the elasticity of the driving motor 5-1 and the continuous friction force generated by the elastic rollers 5-2 and the outer wall, the driving motor 5-1 is connected with the first connecting column 3 or the second connecting column 4 in a rotating mode, the driving component 5 can freely pass through the bent pipeline of the arc-shaped groove, and when the first connecting column 3 or the second connecting column 4 reaches the condition that a vehicle for transporting ultra-long pore type steel pipes can pass through, the controller stops the rotation of the driving motor 5-1, meanwhile, the inner door leaf 1 is opened, the screw is matched with the threaded hole in the threaded seat 8-2 and downwards screwed until the screw abuts against the ground, and the inner door leaf 2, the outer door leaf 2 and the connecting column are reset to the original positions in the same mode of the principle after the vehicle passes through the screw, so that the phenomenon that the work burden of workers is increased when the gate is always moved integrally is avoided, and the reduction of the service life of the gate caused by the fact that the gate is opened and closed without limitation is avoided.

In the second embodiment, when a vehicle transporting a general short pipe steel pipe or an empty vehicle passes through, a lot of space is not required, and the inner door leaf 1 in the middle part is opened at this time.

Although the present invention has been described in detail with reference to the foregoing examples, it will be apparent to those skilled in the art that various changes and modifications can be made in the embodiments described above, or equivalent changes and modifications can be made to some of the technical features of the embodiments described above, and any changes, equivalents, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. An expandable door for conveying ultra-long fine-pore steel pipes comprises an inner door leaf, an outer door leaf, a first connecting column and a second connecting column; the device is characterized in that the left end and the right end of the first connecting column are respectively and rotatably connected with an outer door leaf and an inner door leaf, the left end and the right end of the second connecting column are respectively and rotatably connected with the inner door leaf and the outer door leaf, and the outer door leaf is rotatably connected with the side wall of the near side transportation channel; when the upper walls of the inner door leaves on the first connecting column and the second connecting column along the length direction are positioned on the same horizontal line, the inner door leaves on the first connecting column and the second connecting column are combined to form a shielding connector structure; the lower ends of the first connecting column and the second connecting column are respectively provided with a driving assembly, a first arc-shaped groove and a second arc-shaped groove are respectively formed below the first connecting column and the second connecting column, the first arc-shaped grooves are concentrically arranged on the front side of a hinge joint of the left side wall of the transportation channel and the close end outer door leaf, the first arc-shaped grooves are in sliding adaptation with the driving assemblies at the lower ends of the first connecting column, the second arc-shaped grooves are concentrically arranged on the front side of the hinge joint of the right side wall of the transportation channel and the close end outer door leaf, the second arc-shaped grooves are in sliding adaptation with the driving assemblies at the lower ends of the second connecting column, and the first connecting column and the second connecting column are.

2. An expandable door for transporting ultra-long pore type steel pipes according to claim 1, wherein: the driving assembly comprises a driving motor, an elastic roller and a rotating shaft, the driving motor is arranged in the first arc-shaped groove or the second arc-shaped groove, the driving motor is electrically connected with a storage battery arranged on the first connecting column or the second connecting column and a controller which is arranged independently, the driving motor is driven by double shafts, and the elastic roller is respectively and concentrically connected on the double shafts of the driving motor; the end of the elastic roller wheel, which is far away from the driving motor, is concentrically provided with a sliding column, two arc inner side walls of the first arc-shaped groove or the second arc-shaped groove are respectively provided with an arc sliding groove, the sliding column is in sliding fit with the arc sliding groove at the near end, and the elastic roller wheel is in contact fit with the side wall and the lower wall of the first arc-shaped groove at the near end; the upper end of the driving motor is rotatably connected with the lower end of the first connecting column or the second connecting column through a rotating shaft.

3. An expandable door for transporting ultra-long pore type steel pipes according to claim 2, wherein: the elastic roller is provided with a plurality of convex ridges.

4. An expandable door for transporting ultra-long pore type steel pipes according to claim 1, wherein: the locating component comprises a locating screw rod and a threaded seat, the threaded seat is transversely horizontally arranged at the lower end of any side wall of the first connecting column or the second connecting column, the upper end of the threaded seat is provided with a screw rod which penetrates through threaded holes in the upper end and the lower end of the threaded seat and is matched with the threaded holes in the threaded seat, and the screw rod is matched with the ground in a contact manner.

5. An expandable door for transporting ultra-long pore type steel pipes according to claim 1, wherein: the front and rear sides of the outer door leaf and the inner door leaf are fixedly connected with air deflectors provided with a plurality of guide grooves, and the windward surfaces of the air deflectors and the guide grooves are cambered surfaces.

6. An expandable door for transporting ultra-long pore type steel pipes according to claim 1, wherein: one end of the outer door leaf close to the side wall of the transportation channel is fixedly connected with a lantern ring, and the lantern ring is rotatably sleeved and connected with a hinge rod arranged on the side wall close to the transportation channel; the articulated department of outer door leaf and close side transportation way lateral wall is equipped with and lets a plurality of groups auxiliary wheel group, and auxiliary wheel group includes first drive wheel, second drive wheel, and first drive wheel rotates the cover with the hinge bar and establishes and be connected, and first drive wheel with rotate and locate the second drive wheel meshing transmission on the outer door leaf.

7. An expandable door for transporting ultra-long pore type steel pipes according to claim 1, wherein: and ventilation holes are formed in the upper ends of the outer door leaf and the inner door leaf.

8. An expandable door for transporting ultra-long pore type steel pipes according to claim 1, wherein: the outer door leaf, the inner door leaf, the first connecting column and the second connecting column are all hollow cavity structures.

9. An expandable door for transporting ultra-long pore type steel pipes according to claim 1, wherein: and the solar panel and the illuminating lamp are arranged on the first connecting column or the second connecting column, the solar panel is electrically connected with the storage battery, and the storage battery is electrically connected with the illuminating lamp.

10. An expandable door for transporting ultra-long pore type steel pipes according to claim 1, wherein: the lower end of the inner door leaf is provided with a universal wheel.