CN215709436U - Special mechanism for transporting large pressure steel pipes in tunnel - Google Patents

Abstract

The utility model relates to a special mechanism for transporting large pressure steel pipes in a tunnel. The special mechanism at least comprises a first transportation platform and a second transportation platform, the first transportation platform and the second transportation platform are respectively provided with a first lifting element and a second lifting element, the first lifting element and the second lifting element are connected through the center supporting element in a manner of being capable of lifting and supporting the center supporting element, the first transportation platform and the second transportation platform are both provided with omni-wheel elements, and the omni-wheel elements are rotationally connected to the first transportation platform and/or the second transportation platform in a mode that the moving direction of the first transportation platform and/or the second transportation platform can be switched between a first direction and a second direction through the omni-wheel elements at least so that the first transportation platform and/or the second transportation platform can longitudinally and/or transversely move in a tunnel to improve the efficiency of pipeline alignment.

Description

Special mechanism for transporting large pressure steel pipes in tunnel

Technical Field

The utility model relates to the technical field of transportation equipment, in particular to a special mechanism for transporting large pressure steel pipes in a tunnel.

Background

The pressure steel pipe is a pressure-bearing dredging device which is widely applied in engineering practice, and the application is increasingly wide along with the continuous development of the performance of the pressure steel pipe. The high-pressure-resistant drainage device has the advantages of high pressure resistance, high corrosion resistance, rapidness and convenience in installation and the like, and plays a key role in reducing potential energy loss by pressure-resistant drainage in hydroelectric engineering projects. However, in the actual hydroelectric engineering project, the pressure steel pipes are all installed in the tunnel, and due to the limitations and constraints of construction environment, construction conditions, construction cost and the like and the influence of the weight of the steel pipes, the transportation and installation of the pressure steel pipes in the tunnel are very difficult, so that the transportation work of a novel trolley device special for large-tonnage steel pipes needs to be developed and designed. At present, although a lot of transportation equipment for steel pipe trolleys exist, most of the transportation equipment are applied to the environment which is small in size, light in weight and relatively sufficient in transportation space, the transportation equipment is not applicable to the construction conditions described above, and no trolley device specially used for the pressure steel pipe transportation exists. Therefore, based on the above analysis and technical characteristics, a new trolley device needs to be developed and designed for a specific environment, so as to solve the above contradiction and achieve the purpose of safely and reliably transporting the penstock in the tunnel in the actual hydropower engineering.

For example, chinese patent publication No. CN111455945A discloses a special trolley suitable for a large-diameter pressure pipeline in a diversion tunnel, which belongs to the technical field of transportation equipment and is used for solving the problem of difficulty in transporting and installing the large-diameter pressure pipeline in the tunnel. This platform truck includes traveling system, the girder, braced system, hydraulic system and electrical control system, traveling system is including the walking wheelset, hydraulic motor and supporting platform, supporting platform's left side is provided with the counter weight system, braced system includes the support frame, support frame running gear, horizontal support arm and longitudinal support arm, be fixed with support frame walking hydraulic cylinder on the girder, support frame walking hydraulic cylinder's flexible end with support running gear fixed connection, horizontal support arm symmetric distribution is in the left and right sides of support frame, the vertical upper portion that sets up at the support arm of longitudinal support arm. The beneficial technical effects of the utility model comprise: 1) the trolley can meet the transportation of the steel pipes in the holes, and can solve the problem of quick adjustment and installation of the steel pipes in place; 2) the relative positions of the support frame and the main beam and the weight and the position of the counterweight system are adjusted to meet the requirements of pipe transportation with different lengths and weights; 3) the length of the supporting arm can be adjusted, so that the loading requirements of pipe fittings with different diameters can be met; 4) the trolley can meet the transportation of a single section of steel pipe in a hole, and can also be used by two same trolleys in a matched mode at the same time to transport and install long-sized and heavy pipe fittings. However, the utility model still has the following technical defects: this special platform truck can utilize traveling wheel set of traveling system to turn to and adjust and treat the position that the installation pipeline is located the tunnel, however when the tunnel with treat that the clearance between the installation pipeline is less, because the traveling wheel set of special platform truck can not carry out lateral shifting in the tunnel, only can turn to through the traveling wheel set in the place ahead, therefore need adjust turning to of wheel set around repeatedly many times to can not adjust the axial position of treating the installation pipeline fast when installing the pipeline of major diameter in the minor diameter tunnel. Therefore, improvement is necessary to overcome the disadvantages of the prior art.

Furthermore, on the one hand, due to the differences in understanding to the person skilled in the art; on the other hand, since the inventor of the present invention studied a lot of documents and patents at the time of making the present invention, but the space limit did not list all details and content in detail, however, this by no means does the present invention not have these prior art characteristics, but on the contrary the present invention has all the characteristics of the prior art, and the applicant reserves the right to increase the related prior art in the background art.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a special mechanism for transporting large pressure steel pipes in a tunnel. The special mechanism at least comprises a first transportation platform and a second transportation platform. The first transportation platform and the second transportation platform are respectively provided with a first lifting element and a second lifting element. The first lifting element and the second lifting element are connected through the central supporting element in a mode that the first lifting element and the second lifting element can lift and support the central supporting element, and the first transportation platform and the second transportation platform are both provided with omnidirectional wheel elements. The omni-wheel element is rotatably connected to the first and/or second transport platforms in a manner that enables the first and/or second transport platforms to move longitudinally and/or laterally within the tunnel to improve pipe alignment efficiency by at least being able to switch the direction of movement of the first and/or second transport platforms between a first direction and a second direction via the omni-wheel element.

According to a preferred embodiment, the first transport platform and/or the second transport platform is provided with at least one power element in such a way that it is capable of driving the omni-wheel element. The output of the power element can be connected in a geared manner at least via a transmission shaft in rotation with the omni-wheel element.

According to a preferred embodiment, a plurality of main support elements are connected to the central support element in such a way that they can support the penstock. The ends of the main support elements close to the central support element are evenly distributed along the circumferential surface of the central support element.

According to a preferred embodiment, the end of the main support element remote from the central support element is provided with a telescopic element in such a way as to be able to support penstocks of different pipe diameters. The telescopic element is connected to an end of the main support element remote from the central support element in the axial direction of the main support element.

According to a preferred embodiment, the end of the telescopic element remote from the central support element is provided with a damping element in such a way as to prevent damage to the inner wall of the penstock. The cushioning element is connected to an end of the telescopic element remote from the central support element in a direction perpendicular to the axial direction of the telescopic element.

According to a preferred embodiment, the first lifting element and the second lifting element are provided with rotating elements at one ends close to the central supporting element in a manner that the central supporting element can rotate around the central axis of the central supporting element so as to adjust the installation angle of the pressure steel pipe. The central support member is pivotally connected to the rotating member proximate an end of the first and/or second lifting member.

According to a preferred embodiment, the first transport platform and/or the second transport platform are provided with at least one hydraulic power element in such a way that it is at least able to provide driving power for the telescopic element. The hydraulic power element can be connected to the telescopic element by means of a hydraulic conduit.

According to a preferred embodiment, the central support element is provided with a plurality of guides in such a way as to facilitate the installation of the pressure conduit. The guide part comprises a guide telescopic element and a guide supporting element. The ends of the guiding telescopic elements and the guiding support elements connected with the central support element are distributed along the circumferential surface of the central support element. The guiding telescopic element is telescopically connected with the other end of the guiding support element, which is far away from the central support element, in a mode of adjusting the included angle between the guiding support element and the central support element.

According to a preferred embodiment, the end of the guide support element remote from the central support element is provided with a wheel set element in such a way that the guide support element bears against the inner wall of the pressure conduit in a rolling connection. The wheel set element is pivotally hinged to an end of the guide support element remote from the central support element.

According to a preferred embodiment, the first transport platform and/or the second transport platform is provided with a counterweight element in such a way that the first transport platform and/or the second transport platform can be kept in balance to prevent the first transport platform and/or the second transport platform from overturning. The weight element can be movably connected to the side of the first transport platform and/or the second transport platform facing away from the ground.

The beneficial technical effects of the utility model at least comprise:

the side of the first transportation platform and the side of the second transportation platform far away from the ground are respectively provided with a first lifting element and a second lifting element, the ends of the first lifting element and the second lifting element far away from the ground are detachably connected through a central supporting element, the first transportation platform and the second transportation platform are respectively provided with an omnidirectional wheel element, the omnidirectional wheel element is movably connected to one side of the first transportation platform and/or the second transportation platform facing the ground, and the moving direction of the first transportation platform and/or the second transportation platform can be switched between the first direction and the second direction through the omnidirectional wheel element so as to realize longitudinal and/or transverse movement in the tunnel to improve the efficiency of pipeline alignment.

Drawings

FIG. 1 is a schematic side view of a preferred embodiment of the present invention;

figure 2 is a simplified schematic view of a preferred embodiment of an omni-wheel element of a first transport platform of the present invention;

FIG. 3 is a schematic top view of a preferred embodiment of the main support element of the present invention.

List of reference numerals

1: the first transport platform 2: the second transport platform 3: a first lifting element

4: second elevating element 5: the center support member 6: omnidirectional wheel element

7: the power element 8: main support member 9: rotating element

10: hydraulic power element 11: the guide portion 12: weight element

8 a: telescopic element 8 b: buffer element

Detailed Description

The following detailed description is made with reference to the accompanying drawings.

As shown in fig. 1 and 2, a special mechanism for transporting large pressure steel pipes in a tunnel at least comprises a first transportation platform 1 and a second transportation platform 2. The first conveying platform 1 and the second conveying platform 2 are respectively provided with a first lifting element 3 and a second lifting element 4 for installing steel pipes at standard heights on one sides far away from the ground. The first lifting element 3 and the end of the second lifting element 4 far away from the ground are detachably connected through a central supporting element 5. Both the first transport platform 1 and one of the second transport platforms 2 are provided with omni-wheel elements 6. Under the condition that the first lifting element 3 and the second lifting element 4 can lift the central supporting element 5 and support the pressure steel pipe to be installed through the central supporting element 5, the omnidirectional wheel element 6 is movably connected to the ground-facing side of the first transportation platform 1 and/or the second transportation platform 2 in a mode that the moving direction of the first transportation platform 1 and/or the second transportation platform 2 can be switched between the first direction and the second direction through the omnidirectional wheel element 6 at least so as to realize longitudinal and/or transverse movement in the tunnel to improve the efficiency of pipeline alignment. Preferably, the first transport platform 1 and the second transport platform 2 may each be a car body equipped with wheel sets. Preferably, the first lifting element 3 and the second lifting element 4 can be used for adjusting the installation elevation of the steel pipe. Preferably, the lifting element may be of the prior art, for example a hydraulic lifting cylinder of the RC100 series type may be used. Preferably, the first lifting member 3 and the second lifting member 4 may support the penstock to be installed by lifting up the center support member 5. Preferably, the lifting stroke of the first lifting element 3 and the second lifting element 4 can be flexibly selected according to actual requirements. For example, the lifting stroke of the first lifting member 3 and the second lifting member 4 may be zero to four hundred millimeters. Preferably, the omni-wheel element 6 may be powered by an electric motor.

Preferably, the omni-wheel element 6 may comprise a plurality of sets of omni-wheels. Preferably, the omni wheel element 6 may be of the prior art, for example a cast ninety degree omni wheel of large load of the model QLM-20. Meanwhile, since the driving and controlling technology of the omni-wheel element 6 is the prior art, a person skilled in the art can easily search and master the corresponding technical data, so that the driving and controlling principle of the omni-wheel element 6 is not described herein again, and the driving and controlling technology of the omni-wheel element 6 is not required to be protected. Preferably, the output of the power element 7 may be rotatably connected to the omni-wheel element 6 by a transmission shaft in a gear mesh. Preferably, the motor may drive the omni-wheel element 6 using a synchronous belt drive. Preferably, the motor may be of the prior art, for example, a motor model Y315M-4 may be used. Preferably, the power of the motor is flexibly selected according to the actual requirements so that the omni-wheel element 6 can reach the required speed of movement. Preferably, the moving speed of the omni-wheel element 6 may be zero to forty meters per minute. Preferably, the speed of movement of the omni-wheel element 6 can be set artificially according to requirements. Preferably, the first direction may be a direction parallel to an axial direction of the tunnel. Preferably, the second direction may be a direction perpendicular to the tunnel axial direction. Preferably, the number of the first and second transportation platforms 1 and 2 may be plural. Preferably, the first transport platform 1 and the second transport platform 2 can adjust the installation axis of the pipeline to be installed in a manner of being moved transversely in a direction perpendicular to the axial direction of the tunnel at the same time. In addition, the radius of the curve section of the tunnel in which the present invention can operate is not limited, and for example, the radius of the curve section of the tunnel may be four hundred meters. Through the configuration mode, when a large-diameter steel pipe is transported in a small-diameter tunnel, the moving direction of the first transportation platform 1 and/or the second transportation platform 2 can be quickly switched between the first direction and the second direction through the omnidirectional wheel element 6, and then the omnidirectional wheel element 6 is moved forwards or backwards through adjusting the motor driving the omnidirectional wheel element 6 to operate, so that the omnidirectional wheel element 6 moves forwards and backwards, and the first transportation platform 1 and the second transportation platform 2 can move longitudinally or transversely in the tunnel at the same time; meanwhile, the first lifting element 3 and the second lifting element 4 can be matched, and the first lifting element 3 and/or the second lifting element 4 can be lifted to adjust the installation elevation of the pipeline to be installed, so that the efficiency of pipeline alignment, pipeline installation and other work is improved finally. Preferably, the core backing component 5 may be made of a metal material. Preferably, the central support element 5 may have a cylindrical shape. Preferably, the interior of the central support element 5 may be hollow, to facilitate the installation of hydraulic lines and the like. Preferably, the length of the central support element 5 can be flexibly set according to practical requirements. Preferably, the vertical total height of the first transport platform 1 and the first lifting element 3 is smaller than a first threshold value. Preferably, the vertical total height of the second transport platform 2 and the second lifting element 4 is also smaller than the first threshold value. Preferably, the first threshold value may be a minimum diameter of the existing pressure pipe. Preferably, the first threshold value may also be set artificially according to the requirements of the actual scene, for example, the first threshold value is one meter.

According to a preferred embodiment, the first transport platform 1 and/or the second transport platform 2 are provided with at least one power element 7 in such a way that they can drive the omni-wheel element 6. The output of the power element 7 can be connected in rotation at least via a transmission shaft in a geared manner to the omni-wheel element 6.

Preferably, the output of the power element 7 may be rotatably connected to the omni-wheel element 6 by a transmission shaft in a gear mesh. Preferably, the power element 7 may drive the omni-wheel element 6 in a synchronous belt drive manner. Preferably, the power element 7 may be of the prior art, for example, a motor of type Y315M-4 may be used. Preferably, the power of the power element 7 is flexibly selected according to the actual requirements so that the omni-wheel element 6 can reach the required moving speed. Preferably, the moving speed of the omni-wheel element 6 may be zero to forty meters per minute. Preferably, the speed of movement of the omni-wheel element 6 can be set artificially according to requirements.

Preferably, the power element 7 can be at least in a geared manner rotationally connected with the omni-wheel element. Preferably, both the first transport platform 1 and the second transport platform 2 may be provided with a power element 7.

According to a preferred embodiment, as shown in fig. 3, a plurality of main support elements 8 are connected to the central support element 5 in such a way as to be able to support the penstock. The ends of the main support elements 8 close to the central support element 5 are evenly distributed along the circumferential surface of the central support element 5. Preferably, the main support element 8 may be made of a metal material. Preferably, the main support element 8 may be cylindrical. Preferably, the main support element 8 may be perpendicular to the central support element 5. Preferably, the number of main support elements 8 may be multiple. Preferably, the main support elements 8 may be detachably connected to the circumferential surface of the central support element 5 at angular intervals. Preferably, the direction of the main support element 8 may be perpendicular to the axial direction of the central support element 5. Preferably, the number of main support elements 8 may be multiple. Preferably, the main support element 8 may be detachably connected to the circumferential surface of the central support element 5.

According to a preferred embodiment, the end of the main support element 8 remote from the central support element 5 is provided with telescopic elements 8a in such a way as to be able to support penstocks of different pipe diameters. The telescopic element 8a is connected to the end of the main support element 8 remote from the central support element 5 in the axial direction of the main support element 8. Preferably, the telescopic element 8a is movably connected to one end of the main support element 8 close to the penstock. Preferably, the telescopic element 8a can be of the known art, for example, a telescopic hydraulic cylinder of the type 3TG-112X785-16MPa can be used. Preferably, the telescopic stroke of the telescopic element 8a can be flexibly selected according to actual requirements. For example, the telescopic travel of the telescopic element 8a may be zero to one hundred millimetres.

According to a preferred embodiment, the end of the telescopic element 8a remote from the central support element 5 is provided with a buffer element 8b in such a way as to prevent damage to the inner wall of the penstock. The damping element 8b is connected to the end of the telescopic element 8a remote from the central support element 5 in a direction perpendicular to the axial direction of the telescopic element 8 a. Preferably, the shape of the buffer element 8b can be flexibly set according to the requirements of the actual scene. Preferably, the damping element 8b may be rectangular. Preferably, the area of the cushioning element 8b in contact with the pressure conduit is larger than the cross-sectional area of the telescopic element 8 a. Preferably, the buffer member 8b may be a common metal plate.

According to a preferred embodiment, the ends of the first lifting element 3 and the second lifting element 4 close to the central support element 5 are each provided with a rotation element 9 in such a way as to be able to rotate the central support element 5 around its central axis to adjust the installation angle of the penstock. The end of the central support element 5 close to the first and/or second lifting element 3, 4 is pivotally connected to a rotating element 9. Preferably, the rotating element 9 may be powered by a hydraulic motor. Preferably, the rotary element 9 may be of the prior art, for example, a hydraulic motor of the type A2FM80/61W-PAB029 may be used. Preferably, the rotation speed and the adjustment range of the rotating element 9 can be flexibly selected according to actual requirements. For example, the rotational speed of the rotary element 9 may be 0.25r/min, and the adjustment range of the rotary element 9 may be zero to three hundred and sixty degrees. Through this configuration, can make the rotation of center support element 5 carry out three hundred sixty degrees along its axial at least through rotating element 9, and then adjust the installation angle of the pressure steel pipe of transporting through center support element 5 to the subsequent installation fixed work of pressure steel pipe.

According to a preferred embodiment, the first transport platform 1 and/or the second transport platform 2 are provided with at least one hydraulic power element 10 in such a way that it is at least able to provide driving power for the telescopic elements 8 a. The hydraulic power element 10 can be connected to the telescopic element 8a by means of hydraulic conduits. Preferably, the number of hydraulic power elements 107 may be two. Preferably, both the first transport platform 1 and the second transport platform 2 may be equipped with hydraulic power elements 107. Preferably, the flow rate and the system pressure provided by the hydraulic power element 107 can be flexibly set according to actual requirements, for example, the flow rate provided by the hydraulic power element 107 can be 50L/min, and the system pressure can be 16 MPa. Preferably, the hydraulic power unit 107 may be of the prior art, for example, an electrically powered hydraulic pump of the type PE10 may be used. Preferably, the telescopic element 8a and the hydraulic power element 107 may be detachably connected by a metal hydraulic pipe.

According to a preferred embodiment, the central support element 5 is provided with a plurality of guides 11 in such a way as to facilitate the installation of the pressure conduits. The guide portion 11 includes a guide telescopic member 4a and a guide support member 4 b. The ends of the guide telescopic elements 4a and the guide support elements 4b connected to the center support element 5 are distributed along the circumferential surface of the center support element 5. The guiding telescopic element 4a is telescopically connected to the other end of the guiding support element 4b remote from the central support element 5 in such a way that the angle between the guiding support element 4b and the central support element 5 can be adjusted. Preferably, the guide portion 11 is composed of a guide telescopic member and a guide support member in such a manner that the guide portion 11 can be extended or contracted. Preferably, the guide telescopic member may be movably coupled to the guide support member by a rotation shaft. Preferably, the guiding telescopic element can be made by the prior art, for example, a telescopic hydraulic cylinder with the model number of 3TG-112X785-16MPa can be used. Preferably, a plurality of the guide telescopic elements can be simultaneously telescopic. Preferably, the guide 11 of the first transport platform 1 can be movably connected to the end of the central support element 5 remote from the second transport platform 2. Preferably, the guiding telescopic element and the end of the guiding support element remote from the central support element 5 can be movably connected by a rotating shaft. Through the configuration mode, the guiding and supporting element is abutted against the inner wall of the installed pressure steel pipe by stretching the guiding telescopic element so that the circle center of the circular ring where the guiding and supporting element is located on the central axis of the pressure steel pipe to be aligned, and therefore alignment is facilitated at one time to improve the alignment efficiency of the pressure pipeline to be installed and the installed pressure steel pipe.

According to a preferred embodiment, the end of the guiding support element 4b remote from the central support element 5 is provided with a wheel set element 11c in such a way that the guiding support element 4b bears against the inner wall of the pressure conduit in a rolling connection. The wheel set element is pivotally hinged to the end of the guide support element 4b remote from the central support element 5. Preferably, the wheel set elements may be conventional universal wheels.

According to a preferred embodiment, the first transport platform 1 and/or the second transport platform 2 are provided with a weight element 12 in such a way that the first transport platform 1 and/or the second transport platform 2 can be kept in balance to prevent the first transport platform 1 and/or the second transport platform 2 from overturning, wherein the weight element 12 can be movably connected to the side of the first transport platform 1 and/or the second transport platform 2 facing away from the ground. Preferably, the weight element 12 can be movably connected to the side of the first transport platform 1 and/or the second transport platform 2 facing away from the ground by means of a sliding rail. Preferably, the length direction of the slide rail may be parallel to the direction of the central support element. Preferably, the weight element 12 may be a common metal block. Preferably, the weight of the weight element 12 can be flexibly selected according to the actual requirements. Preferably, the mounting position of the weight element 12 can also be flexibly selected according to the actual requirements to maintain the balance of the first transport platform 1 and/or the second transport platform 2.

To facilitate understanding of the working principle of the present embodiment, the working process of the present invention is briefly described as follows: firstly, an upper wood is laid on the lower part of the steel pipe to be transported to avoid the sling of the crane. And then, removing the cross brace at the end of the steel pipe to check and adjust the roundness of the steel pipe. For example, the difference in diameter between the steel pipes is not more than 5D/1000 and not more than 40 mm. Then, the approach steel pipe is hoisted to a designated position by a crane, wherein the crane can adopt a flexible linear sling. Next, the main support element 8 and the guide 11 are retracted so that the first transport platform 1 and the second transport platform 2 can move within the pipeline. The first transport platform 1 is then passed out of the steel pipe to be transported by means of the omni-wheel element 6. Wherein the first transportation platform 1 is closer to the installed pipeline, and the second transportation platform 2 is further from the installed pipeline. At this time, the steel duct may be supported by the two main supporting members 8 against the inner wall of the steel duct while the steel duct to be transported is lifted off the ground by the first elevating member 3 and the second elevating member 4. Thereafter, the omni-wheel element 6 of the second transport platform 2 is driven such that the omni-wheel element 6 can be moved in the tunnel axial direction, thereby advancing to the location where the pipeline is to be installed. When the first transportation platform 1 runs into the hole and is a certain distance, for example, five meters away from the steel pipe installed on the upper section, the guide part 11 of the first transportation platform 1 is slowly retracted. Then, the guide part 11 of the first transportation platform 1 is extended into the pipe orifice of the steel pipe to be transported, and the guide support element is pressed against the inner wall of the installed pressure steel pipe by extending the guide telescopic element. Thereafter, the hydraulic motor is actuated to extend the telescopic member 8a of the main support member 8 to support the inner wall of the steel pipe to be transported. Thereafter, the lifting elements of the first transport platform 1 are retracted so that the first transport platform 1 is lifted off the ground or shield disc. At this time, the moving direction of the first transportation platform 1 and/or the second transportation platform 2 can be quickly switched between the first direction and the second direction through the omnidirectional wheel element 6, and then the omnidirectional wheel element 6 is moved forward or backward by adjusting the motor driving the omnidirectional wheel element 6 to operate, so that the first transportation platform 1 and the second transportation platform 2 can move left or right in the tunnel in the direction perpendicular to the axial direction of the tunnel; meanwhile, the first lifting element 3 and the second lifting element 4 can be matched to adjust the installation elevation of the pipeline to be installed through lifting the first lifting element 3 and/or the second lifting element 4, and finally, the pipeline to be installed and the installed pipeline are quickly aligned. After that, the second transport platform 2 is slowly driven forward. After the steel pipe to be installed is positioned and fixed, the first transporting platform 1 is slowly withdrawn from the steel pipe. After the first transportation platform 1 moves back to the pipe orifice of the section of steel pipe, the first transportation platform 1 is lowered to the ground or a shield pipe sheet by using the first lifting element 3. When the guide part 11 of the first transportation platform 1 is separated from the steel pipe, the guide telescopic element is extended again. At this point, the wheelset elements on the leading telescoping elements may be held approximately three to five centimeters from the shield disk or tunnel interior wall in preparation for the next steel pipe to be transported.

It should be noted that the above-mentioned embodiments are exemplary, and that those skilled in the art, having benefit of the present disclosure, may devise various arrangements that are within the scope of the present disclosure and that fall within the scope of the utility model. It should be understood by those skilled in the art that the present specification and figures are illustrative only and are not limiting upon the claims. The scope of the utility model is defined by the claims and their equivalents.

The present description contains several inventive concepts, and the applicant reserves the right to submit divisional applications according to each inventive concept. The present description contains several inventive concepts, such as "preferably", "according to a preferred embodiment" or "optionally", all indicating that the respective paragraphs disclose an independent concept, the applicant reserves the right to submit divisional applications according to each inventive concept.

Claims (10)

1. A special mechanism for transporting large-scale pressure steel pipes in a tunnel at least comprises a first transportation platform (1) and a second transportation platform (2), and is characterized in that,

a first lifting element (3) and a second lifting element (4) are respectively arranged on one sides of the first transportation platform (1) and the second transportation platform (2) far away from the ground,

the ends of the first lifting element (3) and the second lifting element (4) far away from the ground are connected through the central supporting element (5) in a manner of being capable of lifting and supporting the central supporting element (5),

the first transport platform (1) and one second transport platform (2) are both provided with omni-wheel elements (6),

wherein, in case the central support element (5) is capable of supporting a penstock to be installed, the omni-wheel element (6) is rotatably connected to the ground-facing side of the first (1) and/or second (2) transport platform in such a way that at least the moving direction of the first (1) and/or second (2) transport platform can be switched between a first direction and a second direction by the omni-wheel element (6) to effect a longitudinal and/or transverse movement of the first (1) and/or second (2) transport platform within the tunnel.

2. The special mechanism as claimed in claim 1, characterised in that the first transport platform (1) and/or the second transport platform (2) is/are provided with at least one power element (7) in such a way that it can drive the omni-wheel element (6), wherein the output of the power element (7) can be connected rotationally in a geared way with the omni-wheel element (6) at least via a transmission shaft.

3. -dedicated mechanism according to claim 2, characterised in that a plurality of main support elements (8) are connected to the central support element (5) in such a way that they can support the penstock, wherein the ends of the main support elements (8) close to the central support element (5) are evenly distributed along the circumferential surface of the central support element (5).

4. -dedicated mechanism according to claim 3, characterised in that the end of the main support element (8) remote from the central support element (5) is provided with a telescopic element (8a) in such a way that it can support penstocks of different pipe diameters, whereby the telescopic element (8a) is connected to the end of the main support element (8) remote from the central support element (5) in the axial direction of the main support element (8).

5. Special mechanism according to claim 4, characterized in that the end of the telescopic element (8a) remote from the central support element (5) is provided with a damping element (8b) in such a way that damage to the inner wall of the penstock is prevented, wherein the damping element (8b) is connected to the end of the telescopic element (8a) remote from the central support element (5) in a direction perpendicular to the axial direction of the telescopic element (8 a).

6. Special mechanism according to claim 5, characterized in that the ends of the first lifting element (3) and the second lifting element (4) close to the central support element (5) are each provided with a rotation element (9) in such a way that the central support element (5) can be rotated about its central axis for adjusting the installation angle of the penstock, wherein the ends of the central support element (5) close to the first lifting element (3) and/or the second lifting element (4) are pivotally connected to the rotation elements (9).

7. Special mechanism according to claim 6, characterized in that the first transport platform (1) and/or the second transport platform (2) are provided with at least one hydraulic power element (10) in such a way that it is at least possible to provide driving power for the telescopic element (8a), wherein the hydraulic power element (10) is connectable to the telescopic element (8a) by means of hydraulic conduits.

8. Special mechanism according to claim 7, characterized in that the central support element (5) is provided with a plurality of guides (11) in a manner that facilitates the installation of the penstock, said guides (11) comprising a guide telescopic element (4a) and a guide support element (4b), wherein the ends of the guide telescopic element (4a) and of the guide support element (4b) connected to the central support element (5) are each distributed along the circumferential surface of the central support element (5), the guide telescopic element (4a) being telescopically connected to the other end of the guide support element (4b) remote from the central support element (5) in a manner that the angle between the guide support element (4b) and the central support element (5) can be adjusted.

9. Mechanism according to claim 8, characterized in that the end of the guide support element (4b) remote from the centre support element (5) is provided with a wheelset element (11c) in such a way that the guide support element (4b) bears against the inner wall of the pressure conduit in a rolling connection, wherein the wheelset element is pivotally hinged to the end of the guide support element (4b) remote from the centre support element (5).

10. The special mechanism as claimed in claim 9, characterized in that the first transport platform (1) and/or the second transport platform (2) are provided with a counterweight element (12) in such a way that the balance of the first transport platform (1) and/or the second transport platform (2) can be maintained to prevent the first transport platform (1) and/or the second transport platform (2) from tipping over, wherein the counterweight element (12) can be movably connected to the side of the first transport platform (1) and/or the second transport platform (2) facing away from the ground.

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