Disclosure of Invention
In order to solve the defects in the prior art, the invention discloses a temporary transfer device for large steel pipes for buildings, which is realized by adopting the following technical scheme.
In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention conventionally use, which are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, or be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
The utility model provides a interim transfer device of large-scale steel pipe that building was used which characterized in that: the clamping device comprises a gantry, a clamping block A, a clamping block B, a clamping plate A, a clamping block C, a clamping plate B, a clamping block D, a worm wheel, a rotating shaft and a gear, wherein a moving device is arranged on the gantry; the arc-shaped holding plate A and the arc-shaped holding plate B respectively slide on the arc-shaped inner wall of the gantry around the respective arc center axes; two clamping blocks C are symmetrically arranged on two sides of the holding plate A, and the two clamping blocks C are respectively matched with the two clamping blocks B symmetrically arranged on the edges of two sides of the arc-shaped inner wall of the gantry so as to limit the maximum sliding angle when the holding plate A coats the large-sized steel pipe; two clamping blocks D are symmetrically arranged on two sides of the holding plate B, and the two clamping blocks D are respectively matched with the two clamping blocks A symmetrically arranged on the edges of two sides of the arc-shaped inner wall of the portal frame so as to limit the sliding of the holding plate B in an initial state under the action of self weight; an arc tooth groove is formed on the outer convex cambered surface of the holding plate A, and a movable groove is formed on the arc inner wall of the door frame; the worm driven by hand is installed on the door frame through a fixed seat matched with the worm in a rotating way; two ends of the rotating shaft which is rotationally matched with the door frame are respectively provided with a worm wheel and a gear, and the gear is positioned in the movable groove; the worm wheel is meshed with the worm, and the gear is meshed with an arc tooth surface in the arc tooth groove. The tooth grooves and the movable grooves enable the gears not to occupy space on the side wall of the door frame, and the related structure for driving the holding plate A to slide relative to the door frame around the arc center axis of the holding plate A is more compact.
Embrace the circular arc radius of the indent cambered surface of board A and embrace the circular arc radius of the indent cambered surface of board B and equal, the circular arc radius of the evagination cambered surface of embracing board A and the circular arc radius of the evagination cambered surface of embracing board B equal, the radius of embracing the indent cambered surface place circle of board A and embracing board B equals the external diameter of the large-scale steel pipe of transport, guarantee to embrace board A and accomplish the cladding back to large-scale steel pipe, embrace board A and embrace board B and form effective cladding to large-scale steel pipe simultaneously, prevent to take place the transport of the large-scale steel pipe that leads to for rocking of portal unsmooth carrying out the transportation process because of large-scale steel pipe. The inner concave cambered surface at the tail end of the holding plate A is connected and transited with the outer convex cambered surface through a transition cambered surface A, and the inner concave cambered surface at the tail end of the holding plate B is connected and transited with the outer convex cambered surface through a transition cambered surface B; the arc radius of the transition arc surface A is equal to that of the transition arc surface B, the arc radius of the transition arc surface A is larger than that of the concave arc surface of the holding plate A, the large steel pipe can smoothly enter between the holding plate A and the holding plate B when the holding plate A and the holding plate B are nested on the large steel pipe from one end of the large steel pipe along the central axis of the large steel pipe, and the arc center axes of the holding plate A and the holding plate B are higher than the central axis of the large steel pipe by a certain height, so that the large steel pipe is effectively lifted to be separated from the ground by a certain height after the holding plate A completely covers the large steel pipe, and the large steel pipe is prevented from interfering with the ground in the carrying process. A connecting line between the upper end of the arc where the transition arc surface A is located and the upper end of the arc where the transition arc surface B is located is initially in a horizontal state and vertically intersects with the arc center axis of the holding plate A, the length of the connecting line between the upper end of the arc where the transition arc surface A is located and the upper end of the arc where the transition arc surface B is located is equal to the diameter of a circle where the concave arc surfaces of the holding plate A and the holding plate B are located, and a large steel pipe initially wrapped between the transition arc surface A and the transition arc surface B by the holding plate A and the holding plate B rotates under the driving of the moving holding plate A; when the holding plate A slides for a certain angle along the arc-shaped inner wall of the gantry, the rotating large steel pipe can reversely roll to the position between the concave cambered surface of the holding plate A and the concave cambered surface of the holding plate B from the position between the transition cambered surface A and the transition cambered surface B.
As a further improvement of the technology, the outer convex cambered surface of the holding plate A is symmetrically provided with two trapezoidal guide strips A, and the two trapezoidal guide strips A respectively slide in two arc trapezoidal guide grooves on the arc inner wall of the gantry around the arc center axis of the holding plate A; two trapezoidal guide strips B are symmetrically installed on the outer convex cambered surface of the holding plate B, and the two trapezoidal guide strips B respectively slide in two arc trapezoidal guide grooves on the arc inner wall of the portal frame around the arc center axis of the holding plate B. The cooperation of trapezoidal conducting strip A and trapezoidal guide slot plays the location guide effect to embracing the slip of board A along the arc inner wall on the portal. The trapezoidal guide strip B and the trapezoidal guide groove are matched to play a positioning and guiding role in the sliding of the holding plate B along the arc-shaped inner wall on the door frame.
As a further improvement of the technology, two bases are symmetrically arranged at the bottoms of the two supports of the portal frame, and two universal wheels are symmetrically arranged on each base in a front-back mode.
As a further improvement of the technology, when the clamping block B contacts the clamping block C, the center of the convex cambered surface of the holding plate a is located at the lowest end of the circle where the convex cambered surface of the holding plate a is located, and at this time, the process of coating the large steel pipe by the holding plate a is finished, and the holding plate a completely bears the gravity of the large steel pipe; because the center of the convex cambered surface of the holding plate A is positioned at the lowest end of the circle where the convex cambered surface of the holding plate A is positioned, the two ends of the holding plate A are respectively identical to the interaction and overlapping parts of the door frame, so that the two ends of the holding plate A are stressed uniformly, and the holding plate A is not easy to deform under the pressure action of a large-scale steel pipe.
As a further improvement of the technology, the trapezoid guide groove on the door frame is coated with lubricating grease.
As a further improvement of the technology, the tail end of the worm is provided with a crank; two clamping blocks E are symmetrically installed at the side edge of the arc-shaped inner wall of the door frame and are respectively matched with the clamping blocks C at the same side, so that the worm which continuously rotates in the reverse direction cannot drive the holding plate A to continuously slide in the reverse direction through a series of transmissions under the interaction of the clamping blocks E and the clamping blocks C after the holding plate A is reset, and the holding plate A can be completely reset without offside.
As a further improvement of the technology, the central axis of the circle where the concave cambered surfaces of the transition cambered surface a and the transition cambered surface B are located coincides with the central axis of the large steel pipe placed on the ground, so that when the holding plate a and the holding plate B are nested on the large steel pipe from one end of the large steel pipe along the central axis of the large steel pipe, the large steel pipe can smoothly enter between the holding plate a and the holding plate B, and the arc center axes of the holding plate a and the holding plate B are higher than the central axis of the large steel pipe by a certain height, so that the holding plate a can effectively lift the large steel pipe to be separated from the ground by a certain height after the large steel pipe is completely coated by the holding plate a, and further, the large steel pipe is ensured not to interfere with the ground in the carrying process.
Compared with the traditional large steel pipe carrying device, the large steel pipe carrying device has the advantages that the worm and worm wheel is driven to operate manually, so that the holding plate A slides along the arc-shaped inner wall of the portal, the sliding holding plate A coats the large steel pipe and lifts the large steel pipe to a certain height, the two ends of the large steel pipe are lifted off the ground to a certain height, and the large steel pipe lifted off the ground is transported; in the whole process of coating and lifting the large-sized steel pipe, the worm and the worm wheel are matched to achieve the effects of reducing speed and increasing torque, so that the large-sized steel pipe is coated and bound and lifted by manually driving the worm and driving the holding plate A through a series of transmissions in a labor-saving manner; meanwhile, the worm and the worm wheel are matched to have a self-locking function, so that after the large steel pipe is coated and lifted and the acting force acting on the crank is removed, the holding plate A cannot slide reversely, the large steel pipe is guaranteed to be kept at a certain height away from the ground all the time in the carrying process, and the large steel pipe is enabled not to interfere with the ground in the carrying and transferring process. The invention only acts on one end of the large steel pipe, so the invention has smaller volume, lighter weight and energy saving, convenient operation, low cost and free steering; the invention occupies less space due to smaller volume and lighter weight, and is convenient to store after the use of the invention is finished. In addition, after the holding plate A completely covers the large steel pipe, the two ends of the holding plate A are respectively equal to the overlapped parts of the door frame, so that the two ends of the holding plate A are uniformly stressed, and the large steel pipe is effectively supported; the structure ensures that the holding plate A is not easy to deform under the long-time compression of the large steel pipe, the service life of the holding plate A is prolonged, and the maintenance cost of equipment is reduced; the invention has simple structure and better use effect.
Detailed Description
The drawings are schematic illustrations of the implementation of the present invention to facilitate understanding of the principles of structural operation. The specific product structure and the proportional size are determined according to the use environment and the conventional technology.
As shown in fig. 3, 4 and 5, the device comprises a gantry 3, a clamping block a6, a clamping block B7, a holding plate a10, a clamping block C15, a holding plate B16, a clamping block D20, a worm 21, a worm wheel 23, a rotating shaft 24 and a gear 25, wherein as shown in fig. 1, 2 and 3, a moving device is mounted on the gantry 3; as shown in fig. 2, 3 and 4, the arc-shaped holding plate a10 and the arc-shaped holding plate B16 respectively slide on the arc-shaped inner wall of the door frame 3 around the respective arc center axes; as shown in fig. 7, two blocks C15 are symmetrically installed on two sides of the embracing plate a 10; as shown in fig. 3, 4 and 6, the two clamping blocks C15 are respectively matched with the two clamping blocks B7 symmetrically installed at the edges of the two sides of the arc-shaped inner wall of the gantry 3 to limit the maximum sliding angle when the holding plate a10 covers the large steel tube 1; as shown in fig. 8, two blocks D20 are symmetrically installed on two sides of the embracing plate B16; as shown in fig. 3, 4 and 6, the two latch blocks D20 are respectively matched with the two latch blocks a6 symmetrically installed at the two side edges of the arc-shaped inner wall of the gantry 3 to limit the sliding of the holding plate B16 in the initial state under the action of self weight; as shown in fig. 7, the arc-shaped tooth socket 13 is formed on the convex cambered surface of the holding plate a 10; as shown in fig. 6, the arc-shaped inner wall of the door frame 3 is provided with a movable groove 5; as shown in fig. 3, 4 and 5, the worm 21 driven manually is mounted on the gantry 3 through a fixed seat 26 in rotary engagement therewith; as shown in fig. 5, a worm wheel and a gear 25 are respectively installed at both ends of a rotating shaft 24 rotatably engaged with the door frame 3, and the gear 25 is located in the movable slot 5; as shown in fig. 3, 4, 5, the worm wheel meshes with the worm 21; as shown in fig. 2 and 6, the gear 25 engages with the arc-shaped tooth surface in the arc-shaped tooth groove 13. The toothed slot 13 and the active slot 5 allow the gear wheel 25 to occupy no space on the side wall of the portal 3, making the relative structure of the driving armboard a10 sliding about its arc-centre axis with respect to the portal 3 more compact.
As shown in fig. 2, the arc radius of the concave arc surface of the holding plate a10 is equal to the arc radius of the concave arc surface of the holding plate B16, and the arc radius of the convex arc surface of the holding plate a10 is equal to the arc radius of the convex arc surface of the holding plate B16; as shown in fig. 1 and 2, the radius of the circle where the concave arc surfaces of the holding plate a10 and the holding plate B16 are located is equal to the outer diameter of the large steel pipe 1 to be conveyed, so that after the large steel pipe 1 is coated by the holding plate a10, the holding plate a10 and the holding plate B16 simultaneously form effective coating on the large steel pipe 1, and the large steel pipe 1 is prevented from being conveyed unsmoothly due to the shaking of the large steel pipe 1 relative to the gantry 3 in the process of transferring the large steel pipe 1. As shown in fig. 7, the concave arc surface and the convex arc surface at the tail end of the holding plate a10 are connected and transited through a transition arc surface a 12; as shown in fig. 8, the concave arc surface and the convex arc surface at the tail end of the holding plate B16 are connected and transited through a transition arc surface B18; as shown in fig. 7 and 8, the arc radius of the transition arc surface a12 is equal to the arc radius of the transition arc surface B18; as shown in fig. 2, the arc radius of the transition arc a12 is greater than the arc radius of the concave arc of the holding plate a10, so that when the holding plate a10 and the holding plate B16 are nested on the large steel pipe 1 from one end of the large steel pipe 1 along the central axis of the large steel pipe 1, the large steel pipe 1 can smoothly enter between the holding plate a10 and the holding plate B16, and the arc axes of the holding plate a10 and the holding plate B16 are higher than the central axis of the large steel pipe 1 by a certain height, so that the holding plate a10 can effectively lift the large steel pipe 1 off the ground by a certain height after completely covering the large steel pipe 1, and further ensure that the large steel pipe 1 does not interfere with the ground in the transportation process. As shown in fig. 2, a connecting line between the upper end of the arc where the transition arc a12 is located and the upper end of the arc where the transition arc B18 is located is initially in a horizontal state and vertically intersects with the arc center axis of the holding plate a10, so that the length of the connecting line between the upper end of the arc where the transition arc a12 is located and the upper end of the arc where the transition arc B18 is located is equal to the diameter of the circle where the concave arc of the holding plate a10 and the concave arc of the holding plate B16 are located, and the large steel pipe 1 initially wrapped between the transition arc a12 and the transition arc B18 by the holding plate a10 is driven to rotate by the original holding plate a10 and the holding plate B16; when the holding plate A10 slides along the arc-shaped inner wall of the door frame 3 by a certain angle, the rotating large steel pipe 1 can reversely roll between the concave cambered surface of the holding plate A10 and the concave cambered surface of the holding plate B16 from the transition cambered surface A12 and the transition cambered surface B18.
As shown in fig. 4 and 7, two trapezoidal guide bars a14 are symmetrically installed on the convex cambered surface of the holding plate a10, and the two trapezoidal guide bars a14 respectively slide in the two arc-shaped trapezoidal guide grooves 4 on the arc-shaped inner wall of the gantry 3 around the arc center axis of the holding plate a 10; as shown in fig. 4 and 8, two trapezoidal guide bars B19 are symmetrically installed on the convex cambered surface of the holding plate B16, and the two trapezoidal guide bars B19 respectively slide in the two arc-shaped trapezoidal guide grooves 4 on the arc-shaped inner wall of the gantry 3 around the arc center axis of the holding plate B16. The cooperation of trapezoidal conducting strip A14 and trapezoidal guide slot 4 plays the location guide effect to embracing board A10 along the slip of the last arc inner wall of portal 3. The trapezoidal guide strip B19 and the trapezoidal guide groove 4 are matched to play a positioning and guiding role in the sliding of the holding plate B16 along the arc-shaped inner wall of the door frame 3.
As shown in fig. 3, two bases 8 are symmetrically installed at the two bottom portions of the gantry 3, and two universal wheels 9 are symmetrically installed on each base 8 in a front-back direction.
As shown in fig. 2 and 3, when the clamping block B7 contacts the clamping block C15, the center of the convex arc surface of the holding plate a10 is located at the lowest end of the circle of the convex arc surface of the holding plate a10, at this time, the coating process of the holding plate a10 on the large steel pipe 1 is finished, and the holding plate a10 completely bears the gravity of the large steel pipe 1; at this time, the center of the convex cambered surface of the holding plate A10 is located at the lowest end of the circle where the convex cambered surface of the holding plate A10 is located, so that the two ends of the holding plate A10 are respectively identical to the interaction and overlapping parts of the portal frame 3, the two ends of the holding plate A10 are uniformly stressed, and the holding plate A10 is not prone to deform under the pressure action of the large steel pipe 1.
As shown in fig. 6, the trapezoidal guide groove 4 of the gantry 3 is coated with grease.
As shown in fig. 3 and 4, a crank 22 is mounted at the end of the worm 21; as shown in fig. 3, 4, and 6, two fixture blocks E27 are symmetrically installed at the side edge of the arc-shaped inner wall of the door frame 3, and the two fixture blocks E27 are respectively matched with the fixture block C15 at the same side, so that it is ensured that the worm 21 continuously rotating in the reverse direction does not drive the holding plate a10 to continuously slide in the reverse direction through a series of transmissions under the interaction between the fixture block E27 and the fixture block C15 after the holding plate a10 is reset, so that the holding plate a10 can be completely reset without being out of position.
As shown in fig. 2, the central axis of the circle in which the concave arc surfaces of the transition arc surface a12 and the transition arc surface B18 are located coincides with the central axis of the large steel pipe 1 placed on the ground, so that when the holding plate a10 and the holding plate B16 are nested on the large steel pipe 1 from one end of the large steel pipe 1 along the central axis of the large steel pipe 1, the large steel pipe 1 can smoothly enter between the holding plate a10 and the holding plate B16, and the arc center axes of the holding plate a10 and the holding plate B16 are higher than the central axis of the large steel pipe 1 by a certain height, so that the large steel pipe 1 is effectively lifted off the ground by the holding plate a10 after the large steel pipe 1 is completely wrapped, and further, the large steel pipe 1 is not interfered with the ground in the carrying process.
The worm 21 and the worm wheel 23 in the invention have self-locking function, and simultaneously can realize the effects of speed reduction and torque increase, so that the crank 22 is used for manually driving the holding plate A10 to coat and lift the large steel pipe 1 more easily.
The working process of the invention is as follows: in the initial state, the tail ends of the holding plate A10 and the holding plate B16 are respectively positioned at two ends of the trapezoidal guide groove 4; the fixture block A6 is in contact fit with the fixture block D20; cartridge C15 is in contact engagement with cartridge E27.
When the large steel pipe 1 needs to be temporarily transported by the invention, two inventions are needed to be matched with the two ends of the large steel pipe 1, and the two inventions are used for coating, lifting and transporting one large steel pipe 1; since the two working principles of the present invention for covering and lifting the two ends of the large steel pipe 1 are completely the same, only one working principle of the present invention is explained as follows:
the large-scale steel pipe 1 is nested from one end of the large-scale steel pipe 1 along the direction of the central axis of the large-scale steel pipe 1, because the radius of the circle of the transition arc A12 and the transition arc B18 is slightly larger than that of the large-scale steel pipe 1, and the central axis of the circle of the concave arc A12 and the transition arc B18 is superposed with the central axis of the large-scale steel pipe 1 placed on the ground, one end of the large-scale steel pipe 1 placed on the ground can smoothly enter between the holding plate A10 and the holding plate B16 and pass between the holding plate A10 and the holding plate B16, and gaps exist between the holding plate A10 and the holding plate B16 and the large-scale steel pipe 1 respectively; then, the crank 22 is shaken, and the crank 22 drives the worm 21 to rotate; the worm 21 drives the rotating shaft 24 to rotate through the worm wheel 23 meshed with the worm, and the rotating shaft 24 drives the gear 25 to synchronously rotate; the gear 25 drives the holding plate A10 engaged with the gear to slide along the arc-shaped inner wall of the door frame 3 and cover the large steel pipe 1 between the holding plate A10 and the holding plate B16, and the large steel pipe 1 between the transition arc A12 and the transition arc B18 is gradually clamped due to the fact that the distance between the transition arc A12 and the transition arc B18 is gradually close to each other; while the two cartridges C15 are respectively moved away from the cartridge E27 on the same side, the two cartridges C15 are respectively moved closer to the cartridge B7 on the same side.
With the continuous sliding of the holding plate A10 along the arc-shaped inner wall of the gantry 3, the large steel pipe 1 rotates due to the friction between the transition arc A12 on the holding plate A10 and the large steel pipe 1; the rotating large steel pipe 1 drives the holding plate B16 to slide upwards along the arc-shaped inner wall of the portal 3 through a transition cambered surface B18 in friction fit with the rotating large steel pipe; cartridge a6 separates from cartridge D20, and cartridge C15 gradually approaches cartridge B7; meanwhile, the central axis of the circle where the concave arc surface of the transition arc surface A12 and the transition arc surface B18 is located coincides with the central axis of the large steel pipe 1 placed on the ground, and the arc center axes of the transition arc surface A12 and the transition arc surface B18 rise along with the sliding of the holding plate A10 and the holding plate B16, so that the large steel pipe 1 clamped by the transition arc surface A12 and the transition arc surface B18 in a wrapping mode is gradually lifted, and the position of the gravity center axis of the large steel pipe 1 deviates along with the deviation of the central axis of the transition arc surface A12 and the central axis of the transition arc surface B18; when the junction of the transition arc A12 on the holding plate A10 and the concave arc of the holding plate A10 reaches the lowest height position, because the central axis position of the large steel pipe 1 is slightly higher than the central axes of the concave arcs of the holding plate A10 and the holding plate B16, the large steel pipe 1 which is continuously driven to rotate by the continuously sliding holding plate A10 easily rolls between the concave arc of the holding plate A10 and the concave arc of the holding plate B16 from between the transition arc A12 and the transition arc B18; when the large steel pipe 1 rolls from the position between the transition arc surface A12 and the transition arc surface B18 to the position between the concave arc surface of the holding plate A10 and the concave arc surface of the holding plate B16, the central axis of the large steel pipe 1 is overlapped with the central axes of the holding plate A10 and the holding plate B16; at this time, the holding plate A10 and the holding plate B16 lift the large steel pipe 1 to a certain height.
The worm 21 is driven to rotate continuously by hand; the worm 21 drives the holding plate A10 to slide through a series of transmission, the large steel pipe 1 continues to rotate under the action of the holding plate A10, the large steel pipe 1 continues to drive the holding plate B16 in friction fit with the large steel pipe to slide along the arc-shaped inner wall of the portal 3, and the height of the large steel pipe 1 is not lifted any more; when the clamping block C15 meets the clamping block B7, the embracing plate A10 stops moving under the prevention of the clamping block B7, the center of the convex cambered surface of the embracing plate A10 is located at the lowest end of the circle where the convex cambered surface of the embracing plate A10 is located, the two ends of the embracing plate A10 are respectively equal to the overlapped parts of the door frame 3, the two ends of the embracing plate A10 are stressed reasonably and uniformly, deformation of the embracing plate A10 caused by uneven stress of the two ends of the embracing plate A10 due to long-time repeated use is avoided, and the service life of the embracing plate A10 is prolonged; meanwhile, the holding plate A10 forms stable support for the large steel pipe 1. At this time, the rocking handle 22 stops rocking, the holding plate A10 and the holding plate B16 stop sliding, and the large steel pipe 1 stops rotating; the holding plate A10 and the holding plate B16 can well coat the large steel pipe 1, the large steel pipe 1 is completely supported by the holding plate A10, the holding plate A10 bears all the gravity of the large steel pipe 1, and the lifting of the large steel pipe 1 is finished.
Then, the front and the rear people simultaneously push the two steel tube supporting frames matched with the two ends of the large steel tube 1 to move to the target position, after the steel tube supporting frames reach the target position, the crank 22 is reversely shaken, and the crank 22 drives the holding plate A10 to reversely slide along the arc-shaped inner wall of the portal frame 3 through a series of transmission and gradually contact with the large steel tube 1 for supporting and coating; in the process, the moving holding plate A10 drives the large steel pipe 1 to rotate reversely, the large steel pipe 1 rotating reversely drives the holding plate B16 which also coats the large steel pipe 1 to slide back along the arc-shaped inner wall of the gantry 3, and the fixture block C15 is separated from the fixture block B7 and gradually far away from the fixture block B7; with the resetting of the embracing plate A10 and the embracing plate B16 relative to the door frame 3; the large steel pipe 1 rotating reversely rolls from between the concave arc surface on the holding plate a10 and the concave arc surface on the holding plate B16 to between the transition arc surface a12 on the holding plate a10 and the transition arc surface B18 on the holding plate B16, and then slides to the ground from between the transition arc surface a12 on the holding plate a10 and the transition arc surface B18 on the holding plate B16.
When the holding plate A10 and the holding plate B16 completely reset relative to the gantry 3, the large steel pipe 1 falling to the ground is still positioned between the transition arc A12 on the holding plate A10 and the transition arc B18 on the holding plate B16, and at the moment, the two clamping blocks E27 are respectively in contact fit with the corresponding clamping blocks D20 again and stop shaking the crank 22; then the invention is pushed to separate from the large steel pipe 1 along the central axis direction of the large steel pipe 1, and then the temporary transportation and transfer of the large steel pipe 1 are completed.
In conclusion, the invention has the beneficial effects that: according to the invention, the worm 21 and the worm wheel 23 are manually driven to operate, so that the holding plate A10 slides along the arc-shaped inner wall of the portal 3, the sliding holding plate A10 coats the large steel pipe 1 and lifts the large steel pipe 1 to a certain height, so that two ends of the large steel pipe 1 are simultaneously lifted to a certain height from the ground, and the large steel pipe 1 lifted from the ground is transported; in the whole process of coating and lifting the large-sized steel pipe 1, the worm 21 and the worm wheel 23 are matched to achieve the effects of reducing speed and increasing torque, so that the large-sized steel pipe 1 is coated and bound and lifted more easily by manually driving the worm 21 and driving the holding plate A10 through a series of transmissions; meanwhile, the worm 21 and the worm wheel 23 are matched to have a self-locking function, so that after the large steel pipe 1 is coated and lifted and the acting force acting on the crank 22 is removed, the holding plate A10 cannot slide reversely, the large steel pipe 1 is guaranteed to be always kept at a certain height away from the ground in the carrying process, and the large steel pipe 1 is enabled not to interfere with the ground in the carrying and transferring process. The invention only acts on one end of the large steel pipe 1, so the invention has smaller volume, lighter weight and energy saving, convenient operation, low cost and free steering; the invention occupies less space due to smaller volume and lighter weight, and is convenient to store after the use of the invention is finished. In addition, after the holding plate A10 completely coats the large steel pipe 1, the overlapping parts of the two ends of the holding plate A10 and the gantry 3 are equal, so that the stress on the two ends of the holding plate A10 is uniform, and the large steel pipe 1 is effectively supported; the structure ensures that the holding plate A10 is not easy to deform under the long-time compression of the large steel pipe 1, the service life of the holding plate A10 is prolonged, and the maintenance cost of equipment is reduced.