AGV (Automatic Guided Vehicle) for carrying pipes

Abstract

The invention discloses an AGV for pipe carrying, and relates to the technical field of AGVs, the AGV comprises vehicle bodies, an extension mechanism, the extension mechanism comprises two material carrying plates which are fixedly mounted at the top ends of the two vehicle bodies through bolts respectively, and a protection mechanism, the protection mechanism comprises a protection vertical cylinder and a protection transverse cylinder, and the protection vertical cylinder is fixedly mounted at the top ends of the two vehicle bodies through bolts. The bottom ends of the two sets of protection vertical cylinders are fixedly installed at the four corners of the two material carrying plates through bolts correspondingly, and the two protection transverse cylinders are movably arranged at the top ends of the two sets of protection vertical cylinders on the same front side and the same rear side correspondingly. By adjusting the distance between the two vehicle bodies, the device can adapt to pipe materials of different sizes, the universal applicability of the device is improved, the two ends of the multiple pipe materials are rapidly pressed to be flush through the end protection plates, the pipe materials are prevented from falling off due to inertia when the vehicle bodies are started and stopped, the labor intensity of workers is relieved, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of AGV transport vehicles, in particular to an AGV transport vehicle used for transporting pipe materials. Background Art

[0002] With the rapid development of intelligent manufacturing and automation technology, AGV transport vehicles are increasingly used in industrial production, warehousing and logistics. However, traditional AGV transport vehicles are often not effective in transporting pipes. The Chinese patent application with application number 201810705783.1 discloses "an AGV transport vehicle for transporting heavy tubular materials, including a vehicle chassis, a travel drive system at the lower part of the vehicle chassis, the travel drive system including a drive wheel set, the drive wheel set is fixedly connected to the main beam of the vehicle body on the vehicle chassis through an independent shock absorbing system; a lifting device is provided on the upper part of the vehicle chassis, and the upper part of the lifting device is provided with a lifting device. The load device base is supported with a horizontal plate, and a rotating load device assembly is provided on the upper part of the horizontal plate of the load device base, which directly supports the tubular material and can drive the material to rotate. The present invention integrates the functions of carrying, transporting, lifting, rotating angle and speed control of tubular materials, realizes the lifting, moving / rotating speed, rotating angle, etc. of tubular materials, completes the detection of tubular materials in the translation process, cooperates with equipment for processing, height lifting control, automatic docking and installation of materials and other action controls, reduces the number of other supporting equipment, reduces the operation links, greatly improves the operation efficiency, operation accuracy and safety. This technical solution only solves the problem that the existing heavy tubular material transfer methods have many defects and limitations. When the pipes are placed on the AGV transport vehicle, the placement of the pipes needs to be manually controlled. Otherwise, it is easy to cause the ends to be placed unevenly, resulting in the AGV transport vehicle being unable to ensure a safe distance when moving or turning. Not only may the pipes be damaged, but it may also cause chaos to the coordinated operation of multiple AGV transport vehicles. In addition, when the pipes are transported by the AGV transport vehicle, the pipes are easy to fall off the AGV transport vehicle, thereby affecting production efficiency. Summary of the invention

[0003] The object of the present invention is to provide an AGV transport vehicle for pipe transportation to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an AGV transport vehicle for pipe material transportation, comprising a vehicle body, wherein the vehicle body has two vehicles, each of which is provided with a two-wheel moving device, and further comprising an extension mechanism, a protection mechanism and an end fixing mechanism: The extension mechanism comprises a loading plate, and the loading plates are two in total and are respectively fixed on the top ends of the two vehicle bodies by bolts.

[0005] The protection mechanism includes a protection vertical cylinder and a protection horizontal cylinder. There are two groups of protection vertical cylinders and the bottom ends are fixedly installed at the four corners of the two loading plates by bolts. There are two protection horizontal cylinders and they are movably arranged at the top ends of the two groups of protection vertical cylinders on the same side of the front and rear.

[0006] The end fixing mechanism comprises an end guard plate, and the end guard plate has two parts and the front and rear top ends are respectively fixedly mounted on the two ends of the two protective horizontal cylinders by bolts.

[0007] Preferably, the extension mechanism includes a support rod, a connecting frame, a sliding sleeve and a connecting sliding shaft. There are two groups of support rods and they are fixedly installed at one end close to the two loading plates by bolts respectively. The two groups of support rods are installed at the top of the two loading plates by insertion respectively. There are four connecting frames and they are installed at the front and rear ends of the side close to the two car bodies by rotating shafts respectively. There are two sliding sleeves and they are installed at one end of the two groups of connecting frames located on the same side of the front and rear close to the middle of the two car bodies by rotating shafts respectively. The connecting sliding shaft is installed in the two sliding sleeves by insertion.

[0008] Preferably, the extension mechanism includes a partition plate, an electric push rod, a telescopic rod and a limit rod, the partition plate is fixedly sleeved in the middle of the connecting slide shaft by bolts, the electric push rod is fixedly installed inside the vehicle body by bolts, the telescopic rod is movably arranged inside the electric push rod, one end of the telescopic rod located outside the electric push rod is fixedly connected to the side of the partition plate close to the electric push rod by bolts, there are two limit rods, both of which are movably installed in the vehicle body by insertion, and are respectively located on the upper and lower sides of the electric push rod, and one end of the two limit rods located outside the vehicle body is fixedly connected to the end of the partition plate close to the electric push rod by bolts.

[0009] Preferably, the protective mechanism includes a lifting cylinder, a first threaded rod and a worm gear. There are two groups of lifting cylinders and they are respectively installed inside the two groups of protective vertical cylinders by insertion. There are two first threaded rods and they are both located at the top of a vehicle body away from the electric push rod, and are respectively located inside the two protective vertical cylinders close to the connecting sliding shaft. The bottom end of the first threaded rod is movably installed on the top of the vehicle body through a bearing. The lifting cylinder is movably connected to the first threaded rod through a thread. There are two worm gears and they are respectively fixed and connected to the bottom end of the first threaded rod by bolts.

[0010] Preferably, the protection mechanism includes a worm, a turning handle, a translation slot and a translation slider. The worm is installed on an end of a loading plate away from the electric push rod and close to the connecting sliding shaft through insertion. The two ends of the worm are respectively installed on the bottom ends of two protective vertical cylinders outside the two worm gears through insertion. There are two turning handles and they are fixed on the two ends of the two worms by bolts. The translation slots are opened on both sides in the middle of the bottom end of the protective horizontal cylinder. There are two translation sliders in each protective horizontal cylinder and they are installed in the protective horizontal cylinder through sliding movement. The bottom end of the translation slider is installed in the translation slot through insertion movement. The bottom end of the translation slider is fixed by bolts in the middle of the top of the lifting cylinder close to the connecting sliding shaft.

[0011] Preferably, the end fixing mechanism includes a lifting groove, a rope groove, a guide rod and a lifting slider, the lifting groove is opened at the front and rear ends of the end guard plate, the rope groove is opened at the front and rear top ends of the end guard plate, the guide rod has four groups and is respectively fixed on the left and right sides of the two end guard plates by bolts, and is respectively located at the bottom ends of the four rope grooves, there are two lifting sliders on each end guard plate and are respectively installed in the two lifting grooves by inserting and sliding, and the two groups of lifting sliders are respectively connected to the front and rear ends of the two end guard plates by sliding.

[0012] Preferably, the end fixing mechanism includes a rotating rod, a rope winding shaft, a gear, a tying rope and a rack. The rotating rod is movably installed with a plurality of bearings in each lifting slider. There are two rope winding shafts on each end guard plate, and they are movably installed on the front and rear bottom ends of the end guard plate away from the vehicle body through bearings respectively. The gear is fixedly sleeved on the end of the rope winding shaft close to the end guard plate by bolts. There are two tying ropes and they are movably set on the two end guard plates respectively. The two ends of the tying rope are movably sleeved between the rope winding shaft and the gear. The tying rope is movably installed in two rope grooves by insertion, and is movably installed in two lifting sliders by insertion. The tying rope between the two lifting sliders forms a linear structure. There are four racks and they are movably installed on the four gears at one end away from the middle of the end guard plate by meshing.

[0013] Preferably, the end fixing mechanism comprises a fixing frame, a synchronous plate, a lifting sleeve, a second threaded rod and a motor, there are four groups of fixing frames and two in each group, and one end away from the vehicle body is fixedly mounted on the top and bottom of the rack by bolts, one end of each group of fixing frames away from the rack is fixedly mounted on the vehicle body and the protective vertical cylinder on the side of the end guard plate close to the vehicle body by bolts, there are two synchronous plates and they are respectively slidably mounted on the side of the two end guard plates away from the vehicle body, the two ends of the synchronous plate are respectively fixedly mounted between the two lifting sliders by bolts, there are two lifting sleeves and they are respectively fixedly mounted on the middle of the side of the two synchronous plates away from the end guard plates by bolts, there are two second threaded rods and they are respectively movably mounted on the middle of the side of the two end guard plates away from the vehicle body by bearings, there are two motors and they are respectively fixedly mounted on the middle bottom end of the side of the two end guard plates away from the vehicle body by bolts, the output shaft of the motor is fixedly connected to the bottom end of the second threaded rod by bolts, and the lifting sleeve is movably sleeved on the second threaded rod by threads.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention drives the telescopic rod and the partition plate to move by an electric push rod, thereby adjusting the distance between the two vehicle bodies, so that the device can adapt to pipes of different sizes, improving the universal applicability of the device, and quickly aligning the two ends of multiple pipes through the end guard plate, which not only prevents the pipes from falling due to inertia when the vehicle body is started and stopped, but also reduces the labor intensity of the staff and improves the production efficiency.

[0016] 2. The present invention increases the length of the protective horizontal cylinder by driving the lifting cylinder to extend from the protective horizontal cylinder, thereby increasing the space above the vehicle body and improving the carrying capacity and transportation efficiency of the device. After the ends of the pipes are flush, the lifting slider is driven to descend, so that the binding rope is pressed down, and the flush ends of the pipes are tied up by the binding rope, which effectively fixes the pipes and prevents them from shaking on the loading plate. At the same time, the protective vertical cylinder and the end guard plate prevent the pipes from falling during transportation, thereby ensuring the safety of the AGV transport vehicle and the pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Provides an overall structural diagram for an embodiment of the present invention; Figure 2 A schematic diagram of an extension mechanism provided in an embodiment of the present invention; Figure 3 A schematic diagram of the connection between the protection mechanism and the end fixing mechanism provided in an embodiment of the present invention; Figure 4 A schematic diagram of the internal structure of a protective vertical cylinder provided in an embodiment of the present invention; Figure 5 A schematic diagram of a terminal fixing mechanism provided in an embodiment of the present invention; Figure 6 A schematic diagram of the lifting slider structure provided in an embodiment of the present invention.

[0018] In the figure: 1, vehicle body; 2, extension mechanism; 201, loading plate; 202, support rod; 203, connecting frame; 204, sliding sleeve; 205, connecting sliding shaft; 206, partition plate; 207, electric push rod; 208, telescopic rod; 209, limit rod; 3, protection mechanism; 301, protection vertical cylinder; 302, lifting cylinder; 303, first threaded rod; 304, worm gear; 305, worm; 306, turning handle; 307, protection Horizontal cylinder; 308, translation slot; 309, translation slider; 4, end fixing mechanism; 401, end guard plate; 402, lifting slot; 403, rope slot; 404, guide rod; 405, lifting slider; 406, rotating rod; 407, rope winding shaft; 408, gear; 409, rope binding; 410, rack; 411, fixed frame; 412, synchronous plate; 413, lifting sleeve; 414, second threaded rod; 415, motor. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figures 1 to 6 The present invention provides a technical solution: an AGV transport vehicle for pipe material transportation, comprising a vehicle body 1, wherein the vehicle bodies 1 are two in total and each of the vehicle bodies 1 is provided with a two-wheel moving device, and further comprising an extension mechanism 2, a protection mechanism 3 and an end fixing mechanism 4.

[0021] The extension mechanism 2 includes a loading plate 201 . The loading plates 201 are two in total and are respectively fixed on the top of the two vehicle bodies 1 by bolts.

[0022] The protection mechanism 3 includes a protection vertical cylinder 301 and a protection horizontal cylinder 307. There are two groups of protection vertical cylinders 301 and the bottom ends are fixedly installed at the four corners of the two loading plates 201 by bolts. There are two protection horizontal cylinders 307 and they are movably arranged at the top ends of the two groups of protection vertical cylinders 301 on the same side of the front and rear.

[0023] The end fixing mechanism 4 includes an end guard plate 401. There are two end guard plates 401, and the front and rear top ends are fixedly installed on the two ends of the two protective horizontal cylinders 307 by bolts.

[0024] The extension mechanism 2 includes a support rod 202, a connecting frame 203, a sliding sleeve 204 and a connecting sliding shaft 205. There are two groups of support rods 202, which are respectively fixedly installed at one end close to the two loading plates 201 by bolts. The two groups of support rods 202 are respectively installed on the top of the two loading plates 201 by insertion. There are four connecting frames 203, which are respectively installed at the front and rear ends of the side close to the two car bodies 1 by rotating shafts. There are two sliding sleeves 204, which are respectively installed at one end of the two groups of connecting frames 203 located on the same side at the front and rear close to the middle of the two car bodies 1 by rotating shafts. The connecting sliding shaft 205 is installed in the two sliding sleeves 204 by insertion. The two car bodies 1 are driven to move simultaneously in the direction away from the connecting sliding shaft 205 through the sliding sleeve 204, so that the distance between the two car bodies 1 is increased. At this time, longer pipes can be placed on the two loading plates 201.

[0025] The extension mechanism 2 includes a partition plate 206, an electric push rod 207, a telescopic rod 208 and a limit rod 209. The partition plate 206 is fixedly sleeved in the middle of the connecting slide shaft 205 by bolts, the electric push rod 207 is fixedly installed inside the vehicle body 1 by bolts, and the telescopic rod 208 is movably arranged inside the electric push rod 207. One end of the telescopic rod 208 located outside the electric push rod 207 is fixedly connected to the side of the partition plate 206 close to the electric push rod 207 by bolts. There are two limit rods 209, both of which are inserted into the It is movably installed in the vehicle body 1 and is respectively located on the upper and lower sides of the electric push rod 207. The two limit rods 209 are fixedly connected to the end of the partition plate 206 close to the electric push rod 207 at one end outside the vehicle body 1 by bolts; the telescopic rod 208 is extended by the electric push rod 207, and the partition plate 206 is pushed by the telescopic rod 208, driving the connecting slide shaft 205 to move away from the electric push rod 207. When the connecting slide shaft 205 moves, it drives the sliding sleeve 204 to move away from the partition plate 206.

[0026] The protection mechanism 3 includes a lifting cylinder 302, a first threaded rod 303 and a worm gear 304. There are two groups of lifting cylinders 302 and they are installed in the two groups of protection vertical cylinders 301 by insertion. There are two first threaded rods 303 and they are both located at the top of a car body 1 away from the electric push rod 207, and are respectively located in the two protection vertical cylinders 301 close to the connecting sliding shaft 205. The bottom end of the first threaded rod 303 is movably installed on the top of the car body 1 through a bearing. The lifting cylinder 302 is movably sleeved on the first threaded rod 303 through a thread. There are two worm gears 304 and they are fixedly sleeved on the bottom end of the first threaded rod 303 by bolts. The first threaded rod 303 is driven to rotate by the worm gear 304. When the first threaded rod 303 rotates, the two lifting cylinders 302 away from the electric push rod 207 and close to the connecting sliding shaft 205 are driven to extend out of the protection vertical cylinder 301.

[0027] The protection mechanism 3 includes a worm 305, a turning handle 306, a translation slot 308 and a translation slider 309. The worm 305 is installed at one end of a material loading plate 201 away from the electric push rod 207 and close to the connecting slide shaft 205 by insertion. The two ends of the worm 305 are installed at the bottom ends of the two protection vertical cylinders 301 outside the two worm wheels 304 by insertion. There are two turning handles 306 and they are fixed at the two ends of the two worms 305 by bolts. The translation slot 308 is opened at the middle two ends of the bottom end of the protection horizontal cylinder 307. On the other hand, there are two translation sliders 309 in each protective cross cylinder 307, and they are installed in the protective cross cylinder 307 by sliding movement. The bottom end of the translation slider 309 is installed in the translation groove 308 by insertion movement. The bottom end of the translation slider 309 is fixed by bolts in the middle of the top end of the lifting cylinder 302 close to the connecting sliding shaft 205; the protective cross cylinder 307 is driven to rise through the lifting cylinder 302, and the two end guard plates 401 are driven to rise at the same time through the protective cross cylinder 307, so as to increase the carrying capacity above the two car bodies 1.

[0028] The end fixing mechanism 4 includes a lifting groove 402, a rope groove 403, a guide rod 404 and a lifting slider 405. The lifting groove 402 is opened at the front and rear ends of the end guard plate 401, and the rope groove 403 is opened at the front and rear top ends of the end guard plate 401. There are four groups of guide rods 404 and they are respectively fixedly installed on the left and right sides of the two end guard plates 401 by bolts, and are respectively located at the bottom ends of the four rope grooves 403. There are two lifting sliders 405 on each end guard plate 401 and they are respectively installed in the two lifting grooves 402 by inserting and sliding. The two groups of lifting sliders 405 are respectively connected to the front and rear ends of the two end guard plates 401 by sliding activities; the lifting slider 405 is installed through the lifting groove 402, and the rope groove 403 and the guide rod 404 make the binding rope 409 be movably set on the side of the end guard plate 401 close to the vehicle body 1.

[0029] The end fixing mechanism 4 includes a rotating rod 406, a rope winding shaft 407, a gear 408, a tying rope 409 and a rack 410. The rotating rod 406 is movably installed with a plurality of ropes in each lifting slider 405 through bearings. There are two rope winding shafts 407 on each end guard plate 401, and they are movably installed on the front and rear bottom ends of the end guard plate 401 away from the vehicle body 1 through bearings. The gear 408 is fixedly sleeved on one end of the rope winding shaft 407 close to the end guard plate 401 by bolts. There are two tying ropes 409 and they are movably arranged on the two end guard plates 401. The two ends of the tying rope 409 are respectively The tying rope 409 is installed in the two rope grooves 403 by means of insertion, and is also installed in the two lifting sliders 405 by means of insertion. The tying rope 409 between the two lifting sliders 405 forms a linear structure. There are four racks 410, which are respectively installed at one end of the four gears 408 away from the middle of the end guard plate 401 by means of meshing. The gear 408 is driven to rotate by the rack 410, so that the tying rope shaft 407 rotates with the gear 408. When the tying rope shaft 407 rotates, the tying rope 409 wound up on the tying rope shaft 407 is released.

[0030] The end fixing mechanism 4 includes a fixing frame 411, a synchronous plate 412, a lifting sleeve 413, a second threaded rod 414 and a motor 415. There are four groups of fixing frames 411, and each group has two. The ends away from the vehicle body 1 are fixedly installed on the top and bottom ends of the rack 410 by bolts. The ends of each group of fixing frames 411 away from the rack 410 are fixedly installed on the vehicle body 1 and the protective vertical cylinder 301 on the side close to the end guard plate 401 by bolts. There are two synchronous plates 412, and they are respectively slidably installed on the side of the two end guard plates 401 away from the vehicle body 1. The two ends of the synchronous plate 412 are respectively fixedly installed between the two lifting sliders 405 by bolts. There are two lifting sleeves 413, and they are respectively fixedly installed in the middle of the side of the two synchronous plates 412 away from the end guard plates 401 by bolts. There are two second threaded rods 414 The motors 415 are respectively movably mounted in the middle of one side of the two end guard plates 401 away from the vehicle body 1 through bearings. There are two motors 415, which are respectively fixedly mounted at the middle bottom end of the one side of the two end guard plates 401 away from the vehicle body 1 through bolts. The output shaft of the motor 415 is fixedly connected to the bottom end of the second threaded rod 414 through bolts, and the lifting sleeve 413 is movably sleeved on the second threaded rod 414 through threads; the synchronous plate 412 is driven to descend through the lifting sleeve 413, and the two lifting sliders 405 are driven to descend at the same time through the synchronous plate 412. When the lifting slider 405 descends, a section of the binding rope 409 located on the side of the end guard plate 401 close to the vehicle body 1 is pressed down, and the downward moving section of the binding rope 409 is attached to and binds the end of the pipe. At this time, the two ends of the pipe are fixed by the binding rope 409 to prevent the pipe from shaking on the loading plate 201.

[0031] Working principle: When the present invention is in use, the electric push rod 207 drives the telescopic rod 208 to extend, and the telescopic rod 208 pushes the partition plate 206, driving the connecting slide shaft 205 to move away from the electric push rod 207. When the connecting slide shaft 205 moves, it drives the sliding sleeve 204 to move away from the partition plate 206. When the partition plate 206 moves, the sliding sleeve 204 drives the two car bodies 1 to move away from the connecting slide shaft 205 at the same time, so that the distance between the two car bodies 1 is increased. At this time, longer pipes can be placed on the two loading plates 201, so that the device can be suitable for pipes of different sizes, thereby improving the universal applicability of the device.

[0032] After placing multiple pipes on the loading plate 201, the electric push rod 207 is started to retract the telescopic rod 208, thereby shortening the distance between the two loading plates 201. At this time, the two ends of the multiple pipes are pressed together by the two end guard plates 401. The end guard plates 401 not only prevent the pipes from falling due to inertia when the vehicle body 1 is started and stopped, but also make the two ends of the multiple pipes quickly flush, thereby reducing the labor intensity of the staff and improving production efficiency.

[0033] The worm 305 is driven to rotate by turning the handle 306. When the worm 305 rotates, the first threaded rod 303 is driven to rotate through the worm wheel 304. When the first threaded rod 303 rotates, two lifting cylinders 302 away from the electric push rod 207 and close to the connecting sliding shaft 205 are driven to extend out from the protective vertical cylinder 301, and the protective horizontal cylinder 307 is driven to rise through the lifting cylinders 302, and the two end guard plates 401 are driven to rise at the same time through the protective horizontal cylinder 307, so as to increase the carrying capacity above the two car bodies 1, thereby increasing the carrying capacity of the device and improving the transportation efficiency.

[0034] When the end guard plate 401 follows the protective cross cylinder 307 to rise, the gear 408 is driven to rotate through the rack 410, so that the rope winding shaft 407 follows the gear 408 to rotate. When the rope winding shaft 407 rotates, the rope 409 rolled up on the rope winding shaft 407 is released. After the end of the pipe is flush, the motor 415 is started to drive the second threaded rod 414 to rotate, and the synchronous plate 412 is driven to descend through the lifting sleeve 413. The synchronous plate 412 drives the two lifting slide blocks 405 to descend at the same time. When the lifting slide blocks When 405 descends, a section of the binding rope 409 located on the side of the end guard plate 401 close to the vehicle body 1 is pressed down, and the downwardly moving section of the binding rope 409 adheres to and binds the end of the pipe. At this time, both ends of the pipe are fixed by the binding rope 409 to prevent the pipe from shaking on the loading plate 201, thereby effectively protecting the pipe. The protective vertical cylinder 301 and the end guard plate 401 effectively prevent the pipe from falling during transportation, thereby ensuring the safety of the AGV transport vehicle and the pipe during transportation and improving the transportation efficiency of the pipe.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An AGV transport vehicle for transporting pipe materials, comprising a vehicle body (1), wherein the vehicle bodies (1) are two in total, and each vehicle body is provided with a two-wheeled moving device, and wherein: It also includes an extension mechanism (2), a protection mechanism (3) and an end fixing mechanism (4): An extension mechanism (2), the extension mechanism (2) comprising a material carrying plate (201), the material carrying plates (201) comprising two pieces and respectively fixedly mounted on the top ends of the two vehicle bodies (1); A protection mechanism (3), the protection mechanism (3) comprising a protection vertical cylinder (301) and a protection horizontal cylinder (307), the protection vertical cylinder (301) having two groups and the bottom ends of which are respectively fixedly mounted at the four corners of the two material loading plates (201), and the protection horizontal cylinder (307) having two groups and being movably mounted at the top ends of the two groups of protection vertical cylinders (301) on the same front and rear sides; An end fixing mechanism (4), the end fixing mechanism (4) comprising an end guard plate (401), the end guard plate (401) having two pieces in total and the front and rear top ends thereof being respectively fixedly mounted on the two ends of the two protective horizontal cylinders (307).

2. The AGV transport vehicle for pipe material transportation according to claim 1, characterized in that: The extension mechanism (2) comprises a support rod (202), a connecting frame (203), a sliding sleeve (204) and a connecting sliding shaft (205). The support rod (202) has two groups and is respectively fixedly mounted on one end close to the two material loading plates (201) by bolts. The two groups of the support rods (202) are respectively mounted on the top of the two material loading plates (201) by insertion. The connecting frames (203) have four groups and are respectively mounted on the front and rear ends of the two vehicle bodies (1) by rotating shafts. The sliding sleeves (204) have two groups and are respectively mounted on one end of the middle of the two vehicle bodies (1) by rotating shafts. The connecting sliding shaft (205) is mounted in the two sliding sleeves (204) by insertion.

3. The AGV transport vehicle for pipe material transportation according to claim 2 is characterized in that: The extension mechanism (2) comprises a partition plate (206), an electric push rod (207), a telescopic rod (208) and a limit rod (209); the partition plate (206) is fixedly sleeved in the middle of the connecting slide shaft (205) by means of bolts; the electric push rod (207) is fixedly installed inside the vehicle body (1) by means of bolts; the telescopic rod (208) is movably arranged inside the electric push rod (207); one end of the telescopic rod (208) located outside the electric push rod (207) is fixedly connected to a side of the partition plate (206) close to the electric push rod (207) by means of bolts; there are two limit rods (209) both of which are movably installed inside the vehicle body (1) by means of insertion and are respectively located on the upper and lower sides of the electric push rod (207); one end of the two limit rods (209) located outside the vehicle body (1) is fixedly connected to one end of the partition plate (206) close to the electric push rod (207) by means of bolts.

4. The AGV transport vehicle for pipe material transportation according to claim 3 is characterized in that: The protection mechanism (3) comprises a lifting cylinder (302), a first threaded rod (303) and a worm gear (304); the lifting cylinder (302) comprises two groups and is movably installed in the interior of the two groups of protection vertical cylinders (301) by insertion; the first threaded rod (303) comprises two groups and is located at the top of a vehicle body (1) away from the electric push rod (207), and is located in the interior of two protection vertical cylinders (301) close to the connecting slide shaft (205); the bottom end of the first threaded rod (303) is movably installed on the top of the vehicle body (1) by a bearing; the lifting cylinder (302) is movably sleeved on the first threaded rod (303) by a thread; and the worm gear (304) comprises two groups and is fixedly sleeved on the bottom end of the first threaded rod (303) by bolts.

5. The AGV transport vehicle for pipe material transportation according to claim 4, characterized in that: The protection mechanism (3) comprises a worm (305), a turning handle (306), a translation slot (308) and a translation slider (309). The worm (305) is installed at one end of a material loading plate (201) away from the electric push rod (207) and close to the connecting slide shaft (205) through insertion. The two ends of the worm (305) are installed at the bottom ends of two protection vertical cylinders (301) outside the two worm wheels (304) through insertion. There are two turning handles (306) and they are fixed by bolts on the two ends of the two protection vertical cylinders (301) outside the two worm wheels (304). At both ends of the two worm gears (305), the translation grooves (308) are opened on both sides of the middle of the bottom end of the protective horizontal cylinder (307), and there are two translation sliders (309) in each protective horizontal cylinder (307), and they are installed in the protective horizontal cylinder (307) through sliding movement. The bottom end of the translation slider (309) is installed in the translation groove (308) through insertion movement, and the bottom end of the translation slider (309) is fixedly installed in the middle of the top of the lifting cylinder (302) close to the connecting sliding shaft (205) by bolts.

6. The AGV transport vehicle for pipe material transportation according to claim 5, characterized in that: The terminal fixing mechanism (4) comprises a lifting groove (402), a rope groove (403), a guide rod (404) and a lifting slider (405); the lifting groove (402) is provided at the front and rear ends of the terminal guard plate (401); the rope groove (403) is provided at the front and rear top ends of the terminal guard plate (401); there are four groups of guide rods (404) which are respectively fixedly mounted on the left and right sides of the two terminal guard plates (401) by bolts and are respectively located at the bottom ends of the four rope grooves (403); there are two lifting sliders (405) on each terminal guard plate (401) and are respectively installed in the two lifting grooves (402) by inserting and sliding; the two groups of lifting sliders (405) are respectively sleeved on the front and rear ends of the two terminal guard plates (401) by sliding.

7. The AGV transport vehicle for pipe material transportation according to claim 6, characterized in that: The end fixing mechanism (4) comprises a rotating rod (406), a rope winding shaft (407), a gear (408), a tying rope (409) and a rack (410). The rotating rod (406) is movably mounted in each lifting slider (405) via a bearing. There are two rope winding shafts (407) on each end guard plate (401), and the two rope winding shafts are movably mounted at the front and rear bottom ends of the end guard plate (401) away from the vehicle body (1) via bearings. The gear (408) is fixedly sleeved on one end of the rope winding shaft (407) close to the end guard plate (401) via a bolt. There are two racks (409) and they are movably arranged on the two end guard plates (401). The two ends of the tying rope (409) are movably sleeved between the rope winding shaft (407) and the gear (408). The tying rope (409) is installed in the two rope grooves (403) by insertion and is also installed in the two lifting sliders (405) by insertion. The tying rope (409) between the two lifting sliders (405) forms a linear structure. There are four racks (410) and they are respectively installed on the ends of the four gears (408) away from the middle of the end guard plate (401) by meshing.

8. The AGV transport vehicle for pipe material transportation according to claim 7, characterized in that: The end fixing mechanism (4) comprises a fixing frame (411), a synchronous plate (412), a lifting sleeve (413), a second threaded rod (414) and a motor (415). The fixing frames (411) have four groups, each of which has two members, and one end away from the vehicle body (1) is fixedly mounted on the top and bottom ends of the rack (410) by bolts, respectively. One end of each group of the fixing frames (411) away from the rack (410) is fixedly mounted on the vehicle body (1) and a side of the protective vertical cylinder (301) close to the end guard plate (401) by bolts, respectively. The synchronous plates (412) have two members, each of which is slidably mounted on the side of the two end guard plates (401) away from the vehicle body (1), and the two ends of the synchronous plates (412) are fixedly mounted on the vehicle body (1) and the side of the protective vertical cylinder (301) close to the end guard plate (401). The bolt is fixedly installed between the two lifting sliders (405); there are two lifting sleeves (413) and are respectively fixedly installed by bolts in the middle of the side of the two synchronous plates (412) away from the end guard plate (401); there are two second threaded rods (414) and are respectively movably installed by bearings in the middle of the side of the two end guard plates (401) away from the vehicle body (1); there are two motors (415) and are respectively fixedly installed by bolts at the bottom of the middle of the side of the two end guard plates (401) away from the vehicle body (1); the output shaft of the motor (415) is fixedly connected to the bottom end of the second threaded rod (414) by bolts; and the lifting sleeve (413) is movably sleeved on the second threaded rod (414) by threads.

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