A loading and unloading rack

Abstract

The present invention discloses a loading and unloading rack, which includes a bottom frame, a feeding inclined plane arranged on the bottom frame, a receiving inclined plane arranged on one side of the feeding inclined plane, a receiving plate arranged in front of the receiving inclined plane, and a material pushing mechanism arranged below the connection of the feeding inclined plane and the receiving inclined plane; both the feeding inclined plane and the receiving inclined plane are inclined from high to low towards the receiving plate, and the highest point of the receiving inclined plane is higher than the lowest point of the feeding inclined plane; the material pushing mechanism is used to send the pipe fittings on the feeding inclined plane to the receiving inclined plane; a pushing mechanism is arranged at the rear end of the receiving inclined plane, and the pushing mechanism is used to push the pipe fittings on the receiving inclined plane to the front end of the receiving inclined plane; through the above settings, the loading and unloading of the pipe fittings are integrated, the occupied space is small, and the loading and unloading rack has a simple structure, simple operation, is economical and practical, has low requirements for the material pushing mechanism and the pushing mechanism, and is easy to be popularized and applied on a large scale.

Description

Technical Field

[0001] The present invention relates to the technical field of loading racks, and particularly to a loading and unloading rack. Background Art

[0002] Laser pipe cutting machines are mainly used for processing and cutting of pipe materials such as round pipes and square pipes. They have the advantages of high precision and rapid cutting, and gradually replace traditional metal cutting equipment.

[0003] The above-mentioned pipe fittings are generally relatively long. By manually loading and unloading, the labor intensity is high, the efficiency is low, and the safety is low. Generally, the existing ones use a loading mechanism for loading. After the pipe fittings are processed and cut into short pipes by the laser head, they are then unloaded by an unloading mechanism. The loading and unloading of the above-mentioned pipe fittings need to be realized by a loading mechanism and an unloading mechanism, resulting in a large volume of the entire laser equipment.

[0004] Chinese Patent with Publication No. CN105366328A discloses an automatic pipe loading device, which includes a frame, pipes arranged on the frame, a pipe feeding cylinder A, a pipe feeding cylinder B, a pipe feeding cylinder C, a vibration motor, a pipe pressing cylinder, a pipe discharging cylinder, a pipe discharging rod, rollers and a sprocket. A certain number of pipes are put down through the linkage of the pipe discharging cylinder and the pipe discharging rod. The pipes are lifted onto the vibration motor by the pipe feeding cylinder A. Through the vibration of the vibration motor, the pipes reach the inclined plate. The pipe pressing cylinder is used to press the pipes, and the pipe feeding cylinder C is used to send the pipes to the rollers. The pipe fittings are sent to the working station by driving the sprocket to rotate through a motor. In the above setting, due to the action of gravity, the impact force of the pipes on the cylinder is relatively large, reducing the accuracy and service life of the cylinder. Moreover, due to the inertia of the pipes, it is difficult to ensure that the pipes accurately fall onto the rollers. The safety hazards of the above loading device are relatively large.

[0005] It can be seen that the existing technology still needs to be improved. Summary of the Invention

[0006] In view of the deficiencies of the above-mentioned existing technology, the purpose of the present invention is to provide a loading and unloading rack, aiming to solve the problem that the loading and unloading processes need to be completed by a loading mechanism and an unloading mechanism respectively.

[0007] To achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A loading and unloading rack, comprising: a bottom frame, a feeding inclined plane arranged on the bottom frame, a receiving inclined plane arranged on one side of the feeding inclined plane, a receiving plate arranged in front of the receiving inclined plane, and a top material mechanism arranged below the connection of the feeding inclined plane and the receiving inclined plane; both the feeding inclined plane and the receiving inclined plane are inclined from high to low in the direction of the receiving plate, and the highest point of the receiving inclined plane is higher than the lowest point of the feeding inclined plane; the top material mechanism is used to send the pipe fittings on the feeding inclined plane to the receiving inclined plane; a pushing mechanism is arranged at the rear end of the receiving inclined plane, and the pushing mechanism is used to push the pipe fittings on the receiving inclined plane to the front end of the receiving inclined plane.

[0009] The loading and unloading rack described above, wherein the top material mechanism comprises: a mounting seat arranged on the bottom frame, a lifting cylinder arranged on the mounting seat with its output end facing upwards, a floating joint arranged at the output end of the lifting cylinder, a connecting block arranged at the top of the floating joint, and a top plate connected to the side wall of the connecting block; a first inclined surface is arranged at the top of the top plate, and the first inclined surface is inclined from high to low in the direction of the receiving inclined plane.

[0010] The loading and unloading rack described above, wherein a first mounting plate is vertically arranged on the bottom frame, a first guide rail is vertically arranged on the first mounting plate, a first slider adapted to the first guide rail is arranged on the first guide rail, and the side wall of the first slider is connected to the side wall of the top plate.

[0011] The loading and unloading rack described above, wherein the upper part of the first mounting plate is connected to a pipe diameter adjusting plate, a second inclined surface is arranged at the top of the pipe diameter adjusting plate, the second inclined surface is parallel to the receiving inclined plane, and the second inclined surface is connected to the bottom of the receiving inclined plane.

[0012] The loading and unloading rack described above, wherein a plurality of threaded holes are vertically arranged at the upper and lower parts of the first mounting plate, elongated holes corresponding to the number of threaded holes at the upper part of the first mounting plate are arranged on the pipe diameter adjusting plate, and each elongated hole is parallel to the receiving inclined plane; waist-shaped holes corresponding to the number of threaded holes at the lower part of the first mounting plate are arranged on the mounting seat.

[0013] The loading and unloading rack described above, wherein a chain and sprocket assembly is arranged on the feeding inclined plane, and a detachable cover plate is arranged above the chain and sprocket assembly.

[0014] The loading and unloading rack described above, wherein a buffer plate is arranged on the side wall of the receiving inclined plane facing the feeding inclined plane; a first baffle is vertically arranged on the side wall of the receiving inclined plane away from the feeding inclined plane, and a plurality of first reinforcing ribs are vertically arranged on the outer wall of the first baffle.

[0015] For the loading and unloading rack described above, a second baffle is vertically arranged on the side wall of the receiving plate away from the receiving inclined surface, and a plurality of second reinforcing ribs are vertically arranged on the outer wall of the second baffle.

[0016] For the loading and unloading rack described above, the pushing mechanism includes a pushing cylinder whose output end extends along the length direction of the bottom frame and a pushing plate connected to the output end of the pushing cylinder.

[0017] For the loading and unloading rack described above, a second mounting plate is arranged at the rear end of the bottom frame. A second guide rail is arranged on the second mounting plate along the telescopic direction of the output end of the pushing cylinder. A second slider adapted to the second guide rail is slidably arranged on the second guide rail, and the side wall of the second slider is connected to the pushing plate.

[0018] Beneficial effects:

[0019] The present invention provides a loading and unloading rack. By setting a feeding inclined surface for placing pipe fittings, a jacking mechanism for jacking and feeding, a receiving inclined surface for supporting pipe fittings, a pushing mechanism for pushing pipe fittings, and a receiving plate for receiving pipes, the loading and unloading of pipe fittings are integrated, occupying a small space. The loading and unloading rack has a simple structure, simple operation, is economical and practical, has low requirements for the jacking mechanism and the pushing mechanism, is easy to be widely promoted and applied on a large scale, and has high safety performance. Description of the drawings

[0020] Figure 1 It is a usage state diagram of the loading and unloading rack provided by the present invention.

[0021] Figure 2 It is a structural schematic diagram of the loading and unloading rack Figure 1 .

[0022] Figure 3 It is a structural schematic diagram of the loading and unloading rack Figure 2 .

[0023] Figure 4 It is a structural schematic diagram of the jacking mechanism.

[0024] Figure 5 It is Figure 3 an enlarged view of part A in

[0025] In the accompanying drawings: 1 - chassis, 11 - first mounting plate, 111 - threaded hole, 12 - first guide rail, 13 - first slider, 14 - pipe diameter adjusting plate, 141 - long slot, 15 - second mounting plate, 151 - limit block, 16 - second guide rail, 17 - second slider, 18 - foot cup screw, 19 - ground pile hole, 2 - material discharging inclined plane, 21 - chain pulley assembly, 22 - cover plate, 3 - material receiving inclined plane, 31 - buffer plate, 32 - first baffle, 33 - first reinforcing rib, 34 - laser avoidance opening, 35 - guide plate, 4 - material pushing mechanism, 41 - mounting seat, 411 - kidney-shaped hole, 42 - lifting cylinder, 43 - floating joint, 44 - connecting block, 45 - top plate, 5 - material receiving plate, 51 - second baffle, 52 - second reinforcing rib, 6 - material pushing mechanism, 61 - material pushing cylinder, 62 - material pushing plate, 621 - limit rubber, 622 - polyurethane plate, 100 - pipe fitting. Detailed implementation manners

[0026] The present invention provides a loading and unloading rack. To make the purpose, technical solution and effects of the present invention clearer and more definite, the following further describes the present invention in detail with reference to the accompanying drawings and by way of examples. It should be understood that the specific examples described herein are only used to explain the present invention and are not used to limit the protection scope of the present invention.

[0027] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "front", "rear", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0029] Please refer to Figures 1-3, the present invention provides a loading and unloading rack, comprising: a bottom frame 1, a feeding inclined plane 2 arranged on the bottom frame 1, a receiving inclined plane 3 arranged on one side of the feeding inclined plane 2, a receiving plate 5 arranged in front of the receiving inclined plane 3, and a jacking mechanism 4 arranged below the connection of the feeding inclined plane 2 and the receiving inclined plane 3; both the feeding inclined plane 2 and the receiving inclined plane 3 are inclined from high to low in the direction of the receiving plate 5, and the highest point of the receiving inclined plane 3 is higher than the lowest point of the feeding inclined plane 2; the jacking mechanism 4 is used to send the pipe fitting 100 on the feeding inclined plane 2 to the receiving inclined plane 3; a pushing mechanism 6 is arranged at the rear end of the receiving inclined plane 3, and the pushing mechanism 6 is used to push the pipe fitting 100 on the receiving inclined plane 3 to the front end of the receiving inclined plane 3.

[0030] In practical applications, a laser pipe cutting machine is arranged in front of the receiving inclined plane 3 and the receiving plate 5. The feeding inclined plane 2 is used to place multiple pipe fittings 100 to be processed. Since the feeding inclined plane 2 is inclined, multiple pipe fittings 100 are arranged one by one on the feeding inclined plane 2. When the jacking mechanism 4 jacks up the pipe fitting 100 above it and sends it to the receiving inclined plane 3, due to the action of gravity, other pipe fittings 100 also reach above the jacking mechanism 4 one by one, realizing that the pipe fittings 100 are sent to the receiving inclined plane 3 one by one. The pushing mechanism 6 pushes the pipe fitting 100 to the front end of the receiving inclined plane 3, facilitating the front chuck on the laser pipe cutting machine to clamp the pipe fitting 100, and the rear chuck moves forward to clamp the pipe fitting 100. The rear chuck moves backward on the bed of the laser pipe cutting machine to a certain position. After the pipe fitting 100 passes through the processing and cutting of the laser head above the front chuck, it falls onto the receiving inclined plane 3. Due to the inclined setting of the receiving inclined plane 3, the pipe fitting 100 slides onto the receiving plate 5.

[0031] The above loading and unloading rack has a simple structure. By setting a feeding inclined plane 2 for placing pipe fittings 100, a jacking mechanism 4 for jacking and feeding, a receiving inclined plane 3 for supporting pipe fittings 100, a pushing mechanism 6 for pushing pipe fittings 100, and a receiving plate 5 for receiving pipes, the loading and unloading of pipe fittings 100 are integrated, occupying a small floor space, being economical and practical, having low requirements for the jacking mechanism 4 and the pushing mechanism 6, and having high safety performance.

[0032] Specifically, the receiving plate 5 is detachably arranged on the bottom frame 1. After it is disassembled, a turnover box can be arranged on the bottom frame 1 for turnover, facilitating use in different regions and environments, and making the use of the loading and unloading rack highly flexible.

[0033] In this embodiment, in order to reduce the weight and manufacturing difficulty of the loading and unloading rack, the bottom frame 1 is welded by several square pipes. The feeding inclined plane 2 spans the bottom frame 1 and is set in four numbers. The jacking mechanism 4 is set in four numbers and is evenly arranged on the bottom frame 1. It should be noted here that the set number does not limit this solution.

[0034] In this embodiment, the loading and unloading rack can be applied to loading: pipe fittings with a standard pipe length of 6000 mm, and unloading: pipe fittings with a pipe length within 2000 mm.

[0035] Please refer to Figure 4 , further, the blanking mechanism 4 includes: a mounting seat 41 provided on the chassis 1, a lifting cylinder 42 provided on the mounting seat 41 with its output end facing upward, a floating joint 43 provided at the output end of the lifting cylinder 42, a connecting block 44 provided at the top of the floating joint 43, and a top plate 45 connected to the side wall of the connecting block 44; a first inclined surface is provided on the top of the top plate 45, and the first inclined surface is inclined from high to low in the direction of the receiving inclined surface 3. The lifting of the pipe fitting is realized by the extension of the output end of the lifting cylinder 42. Due to the inclined setting of the top of the top plate 45, the pipe fitting slides onto the receiving inclined surface 3 under the action of gravity. The above structure is simple and easy to implement. By providing the floating joint 43, the hard connection between the lifting cylinder 42 and the top plate 45 is eliminated, which is beneficial to improving the service life of the lifting cylinder 42. Moreover, the height of the floating joint 43 can be finely adjusted at both ends through the cooperation of nuts and screws, so as to realize the lifting of pipe fittings with different pipe diameters.

[0036] Please refer to Figure 4 , further, a first mounting plate 11 is vertically provided on the chassis 1, a first guide rail 12 is vertically provided on the first mounting plate 11, a first slider 13 adapted to the first guide rail 12 is provided on the first guide rail 12, and the side wall of the first slider 13 is connected to the side wall of the top plate 45. By providing the first guide rail 12 and the first slider 13, the load of the lifting cylinder 42 is reduced, and in cooperation with the lifting cylinder 42, the top plate 45 can be smoothly lifted and lowered.

[0037] Please refer to Figure 4 , further, the upper part of the first mounting plate 11 is connected to a pipe diameter adjusting plate 14, a second inclined surface is provided on the top of the pipe diameter adjusting plate 14, the second inclined surface is parallel to the receiving inclined surface 3, and the second inclined surface is connected to the bottom of the receiving inclined surface 3. That is, the pipe diameter adjusting plate 14 is used to support the receiving inclined surface 3. Specifically, the number of the pipe diameter adjusting plates 14 is the same as the number of the blanking mechanisms 4. In this embodiment, four are provided.

[0038] Please refer to Figure 4, Further, a plurality of threaded holes 111 are vertically provided in the upper and lower parts of the first mounting plate 11. Long strip holes 141 corresponding to the number of threaded holes 111 in the upper part of the first mounting plate 11 are provided on the pipe diameter adjusting plate 14, and each long strip hole 141 is parallel to the material receiving inclined surface 3; waist-shaped holes 411 corresponding to the number of threaded holes 111 in the lower part of the first mounting plate 11 are provided on the mounting seat 41. In practical applications, due to different pipe diameters, the central positions of the pipe fittings are different. In order to ensure coaxiality with the front chuck, it is necessary to adjust the heights of the material receiving inclined surface 3 and the material pushing mechanism 4. In the above settings, fine adjustment of the height of the material receiving inclined surface 3 and the height of the material pushing mechanism 4 can be achieved through the cooperation of bolts and long strip holes 141, and bolts and waist-shaped holes 411. Specifically: raise the pipe diameter adjusting plate 14 and the mounting seat 41 in the material pushing mechanism 4 to increase the overall height of the material receiving inclined surface 3 and the height after the output end of the lifting cylinder 42 extends, which is suitable for feeding pipe fittings with small diameters; on the contrary, it is suitable for feeding pipe fittings with large diameters. The loading and unloading rack can be applied to round pipes with a diameter within 100 mm, square pipes and rectangular pipes with a diagonal less than or equal to 100 mm, etc.

[0039] Please refer to Figure 3 , 5 , Further, a chain pulley assembly 21 is provided on the material discharging inclined surface 2, and a detachable cover plate 22 is provided above the chain pulley assembly 21. In one implementation, when feeding round pipes, cover the cover plate 22. Due to the arc edges of the round pipes, they can slide smoothly to the corresponding positions under the action of gravity. In another implementation, when feeding pipe fittings with straight edges such as square pipes or rectangular pipes, open the cover plate 22 to allow the pipe fittings to slide on the chain pulley assembly 21, avoiding the large frictional force between the square pipes or rectangular pipes and the material discharging inclined surface 2, so that the square pipes or rectangular pipes cannot slide smoothly to the corresponding positions. The above settings are all used to ensure that the pipe fittings slide into place.

[0040] Please refer to Figures 1-3 、5, Further, a buffer plate 31 is provided on the side wall of the material receiving inclined surface 3 facing the material discharging inclined surface 2; by providing the buffer plate 31, the impact of the pipe fittings with heavy weight and inertia on the material receiving inclined surface 3 is buffered, and the buffer plate 31 also plays a role in protecting the outer wall of the pipe fittings. A first baffle 32 is vertically provided on the side wall of the material receiving inclined surface 3 away from the material discharging inclined surface 2, and a plurality of first reinforcing ribs 33 are vertically provided on the outer wall of the first baffle 32. Similarly, the first baffle 32 is provided to block the pipe fittings on the material receiving inclined surface 3. In order to reduce the weight of the loading and unloading rack, the first baffle 32 is relatively thin, and a plurality of first reinforcing ribs 33 are provided to improve the rigidity of the first baffle 32 and prevent the first baffle 32 from deforming under impact.

[0041] Please refer to Figures 1-3, Further, a second baffle 51 is vertically arranged on the side wall of the material receiving plate 5 away from the material receiving inclined surface 3, and a plurality of second reinforcing ribs 52 are vertically arranged on the outer wall of the second baffle 51. Similarly, the second baffle 51 is provided to block the processed pipe fittings, and the second reinforcing ribs 52 also play a role in improving the rigidity of the second baffle 51.

[0042] Please refer to Figures 1-3 , Further, a guide plate 35 is arranged at the front end of the first baffle 32, and the guide plate 35 is inclined towards the material receiving plate 5. In practical applications, the pipe fittings sliding onto the material receiving inclined surface 3 are guided by the guide plate 35 to smoothly fall onto the material receiving plate 5. The guide plate 35 plays a guiding role on the one hand and a role in blocking the pipe fittings from sliding off the material receiving plate 5 to the ground on the other hand.

[0043] Please refer to Figure 3 and 5 , Further, the pushing mechanism 6 includes a pushing cylinder 61 whose output end extends along the length direction of the chassis 1 and a pushing plate 62 connected to the output end of the pushing cylinder 61. In one implementation, the pushing cylinder 61 is arranged below the chassis 1, and the extending direction of its output end is away from the front end of the material receiving inclined surface 3, that is, the contracting direction of its output end faces the front end of the material receiving inclined surface 3. Hiding the pushing cylinder 61 below the chassis 1 is beneficial to reducing the occupied space of the loading and unloading rack. By the contraction of the pushing cylinder 61, a driving force is provided for the forward movement of the pipe fittings; by the extension of the pushing cylinder 61, a loading space is provided for the loading of the next pipe fitting; the above structure is simple and easy to implement.

[0044] Please refer to Figure 5 , Further, a second mounting plate 15 is arranged at the rear end of the chassis 1, a second guide rail 16 is arranged on the second mounting plate 15 along the telescopic direction of the output end of the pushing cylinder 61, a second slider 17 adapted to it is slidably arranged on the second guide rail 16, and the side wall of the second slider 17 is connected to the pushing plate 62. By arranging the second guide rail 16 and the second slider 17, the smooth movement of the pushing plate 62 is ensured, the deviation of the pipe fittings is avoided, which is beneficial to ensuring the linear accuracy of the movement of the pipe fittings and is beneficial to the clamping of the front chuck.

[0045] Please refer to Figure 5 , Specifically, in order to further improve the movement smoothness of the pushing plate 62, the second guide rails 16 are symmetrically arranged in two, and at least one second slider 17 is arranged on each second guide rail 16.

[0046] Please refer to Figure 5, Further, a limiting block 151 is provided at the end of the second mounting plate 15, and a limiting rubber 621 is provided on the pushing plate 62. The limiting block 151 and the limiting rubber 621 are on the same horizontal line, and the distance from the limiting block 151 to the pushing cylinder 61 is greater than the distance from the limiting rubber 621 to the pushing cylinder 61. During actual use, when the pushing cylinder 61 extends, the limiting rubber 621 does not contact the limiting block 151. In this embodiment, the limiting block 151 and the limiting rubber 621 are arranged between the two second guide rails 16.

[0047] Please refer to Figure 5 , Further, a polyurethane plate 622 is provided on the side wall of the pushing plate 62 facing the pipe fitting. By providing the polyurethane plate 622, hard collision between the metal pushing plate 62 and the metal pipe fitting is avoided.

[0048] Please refer to Figures 1-4 , Further, a plurality of foot cup screws 18 are provided at the bottom of the chassis 1; a ground pile hole 19 is provided on the outer side of the foot cup screw 18. The ground pile hole 19 provides a pulling and pushing effect on the chassis 1. In practical applications, ground piles can also be driven into the ground pile hole 19 to reinforce the chassis 1. In this embodiment, eight foot cup screws 18 are evenly arranged at the bottom of the chassis 1.

[0049] Please refer to Figures 1-3 , Further, a laser avoidance port 34 is provided at the front end of the receiving inclined plane 3; in practical applications, the laser head located above the front chuck emits laser downward, and the laser will pass through the pipe fitting and reach the receiving inclined plane 3, which will damage the receiving inclined plane 3. Therefore, setting the laser avoidance port 34 can avoid the occurrence of the above problems.

[0050] In summary, the present invention integrates the feeding and discharging of pipe fittings by providing a feeding inclined plane 2 for placing pipe fittings, a feeding mechanism 4 for lifting and feeding, a receiving inclined plane 3 for supporting pipe fittings, a pushing mechanism 6 for pushing pipe fittings, and a receiving plate 5 for connecting pipes. It occupies a small space. The loading and unloading rack has a simple structure, simple operation, is economical and practical, has low requirements for the feeding mechanism 4 and the pushing mechanism 6, is easy to be popularized and applied on a large scale, and has high safety performance. By providing a lifting cylinder 42, a floating joint 43, a connecting block 44 and a top plate 45, it is convenient to finely adjust the lifting height of the feeding mechanism 4. By providing a first guide rail 12 and a first slider 13, the top plate 45 can rise and fall smoothly. By providing a pipe diameter adjusting plate 14, a long slot 141 and the threaded holes 111 on the first mounting plate 11, and the waist-shaped holes 411 on the mounting seat 41 and the threaded holes 111 on the first mounting plate 11, the heights of the receiving inclined plane 3 and the feeding mechanism 4 are adjusted. By providing a chain and sprocket assembly 21 and a detachable cover plate 22, the loading and unloading rack is applicable to round pipes, square pipes, rectangular pipes, etc., and has strong practicability. By providing a buffer plate 31, hard collision between the pipe fittings and the receiving inclined plane 3 is avoided. By providing a first baffle 32 and a first reinforcing rib 33, unprocessed pipe fittings are blocked. By providing a second baffle 51 and a second reinforcing rib 52, processed pipe fittings are blocked. By providing a pushing cylinder 61 and a pushing plate 62, the pushing of the pipe fittings is realized. By providing a second guide rail 16 and a second slider 17, the moving smoothness of the pushing plate 62 is ensured. By providing a polyurethane plate 622 for protecting the end face of the pipe fittings. By providing a foot cup screw 18, the heights of all positions of the chassis 1 are made consistent.

[0051] It can be understood that for those of ordinary skill in the art, equivalent substitutions or changes can be made according to the technical solutions of the present invention and its inventive concept, and all such changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A loading and unloading rack, characterized in that, Including: A chassis, a feeding inclined plane arranged on the chassis, a receiving inclined plane arranged on one side of the feeding inclined plane, a receiving plate arranged in front of the receiving inclined plane, and a top feeding mechanism arranged below the connection of the feeding inclined plane and the receiving inclined plane; both the feeding inclined plane and the receiving inclined plane are inclined from high to low in the direction of the receiving plate, and the highest point of the receiving inclined plane is higher than the lowest point of the feeding inclined plane; the top feeding mechanism is used to send the pipe fittings on the feeding inclined plane to the receiving inclined plane; a pushing mechanism is arranged at the rear end of the receiving inclined plane, and the pushing mechanism is used to push the pipe fittings on the receiving inclined plane to the front end of the receiving inclined plane; the top feeding mechanism includes: a mounting seat arranged on the chassis, a lifting cylinder arranged on the mounting seat with its output end facing upward, a floating joint arranged at the output end of the lifting cylinder, a connecting block arranged on the top of the floating joint, and a top plate connected to the side wall of the connecting block; a first inclined surface is arranged on the top of the top plate, and the first inclined surface is inclined from high to low in the direction of the receiving inclined plane; a first mounting plate is vertically arranged on the chassis, a first guide rail is vertically arranged on the first mounting plate, a first slider adapted to the first guide rail is arranged on the first guide rail, and the side wall of the first slider is connected to the side wall of the top plate; the upper part of the first mounting plate is connected to a pipe diameter adjusting plate, a second inclined surface is arranged on the top of the pipe diameter adjusting plate, the second inclined surface is parallel to the receiving inclined plane, and the second inclined surface is connected to the bottom of the receiving inclined plane; a plurality of threaded holes are vertically arranged on the upper and lower parts of the first mounting plate, elongated holes corresponding to the number of threaded holes in the upper part of the first mounting plate are arranged on the pipe diameter adjusting plate, and each elongated hole is parallel to the receiving inclined plane; waist-shaped holes corresponding to the number of threaded holes in the lower part of the first mounting plate are arranged on the mounting seat; a chain and sprocket assembly is arranged on the feeding inclined plane, and a detachable cover plate is arranged above the chain and sprocket assembly; the pushing mechanism includes a pushing cylinder with its output end extending along the length direction of the chassis and a pushing plate connected to the output end of the pushing cylinder; a second mounting plate is arranged at the rear end of the chassis, a second guide rail is arranged on the second mounting plate along the telescopic direction of the output end of the pushing cylinder, a second slider adapted to the second guide rail is slidably arranged on the second guide rail, and the side wall of the second slider is connected to the pushing plate.

2. The loading and unloading rack according to claim 1, wherein A buffer plate is arranged on the side wall of the receiving inclined plane facing the feeding inclined plane; a first baffle is vertically arranged on the side wall of the receiving inclined plane away from the feeding inclined plane, and a plurality of first reinforcing ribs are vertically arranged on the outer wall of the first baffle.

3. The loading and unloading rack according to claim 1, characterized in that, A second baffle is vertically arranged on the side wall of the receiving plate away from the receiving inclined plane, and a plurality of second reinforcing ribs are vertically arranged on the outer wall of the second baffle.

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