Push-type trolley turning system

Abstract

The present invention discloses a top-pushing trolley flipping system, wherein the trolley includes a pair of first wheels and a pair of second wheels; the top-pushing trolley flipping system includes a pair of track assemblies, each track assembly includes a pair of straight tracks, a lifting track arranged between the pair of straight tracks, and a pair of limit posts arranged below the pair of straight tracks and on both sides of the lifting track, wherein the pair of lifting tracks drives the pair of first wheels to perform vertical reciprocating linear motion downward from the same height as the straight tracks between the pair of limit posts; a push block assembly includes a pair of push blocks corresponding to the pair of second wheels, a driving mechanism, and a retracting mechanism; wherein the reciprocating linear motion of the lifting track is coordinated with the linear motion of the push block. The present invention has the beneficial effect that the automatic flipping of the trolley can be achieved by coordinating the linear motion of the push block with the reciprocating linear motion of the lifting track, which is convenient to operate, saves time and effort, and improves the operational safety of construction personnel.

Description

Technical Field

[0001] The present invention relates to the field of belt roasting machine trolley turning, and more particularly to a push-type trolley turning system. Background Art

[0002] A belt roaster is a thermal equipment used to produce pellets for blast furnaces. It features a vertical circular track along which multiple trolleys operate. The trolleys are fitted with flat grates to support the material. These grates can be mounted on both the upper and lower surfaces of the trolley. When the trolley operates under high temperatures for a long time, the trolley body can deflect downward, creating a downward-convex arc on the lower surface. This prevents proper contact with the sealing plate beneath it, leading to severe air leakage and impacting overall equipment operation. In this case, the grates can be removed, the trolley flipped over, and the removed grates reinstalled. After flipping, the weight of the material and the trolley itself causes the trolley to deflect downward, returning its lower surface to a flat surface and allowing continued use. Prior art methods required first removing the trolley from the belt roaster for flipping. The original method required manually attaching a hoist to one wheel of the old trolley, manually securing the other wheel relative to the ground or track, and then manually moving a crane to shift the trolley's center of gravity. After flipping, the platform trolley was then placed. In the above operations, "manually clamping the sling on the wheel at one end of the old trolley" requires manual work, is time-consuming and labor-intensive; "manually fixing the wheel at the other end relative to the ground or track so that it does not move" is not easy to implement and requires making a special clamp on the ground or track. Even with the clamp, the wheel must be manually fixed; "manually moving the crane to change the center of gravity of the trolley, flipping it over and placing the platform car" is uncontrollable and the most unsafe. The operator needs to slowly move the crane to change the center of gravity of the trolley to avoid the impact caused by the sudden change of the center of gravity; due to the speed limit of the crane, the operator needs to operate it by clicking when leveling to avoid accidents such as falling off the car and hitting the track.

[0003] Therefore, the existing trolley flipping method is extremely dangerous and requires the cooperation of the hook operator and the crane operator. There is no guarantee for the safety of personnel and equipment, and the operation efficiency is low. There is an urgent need for a safe, time-saving and labor-saving trolley flipping system. Summary of the Invention

[0004] One purpose of the present invention is to solve at least the above-mentioned problems and provide a push-type trolley flipping system, which, after the trolley is hoisted into the track, can realize the automatic flipping of the trolley through the coordination of the horizontal linear motion of the push block and the vertical reciprocating linear motion of the lifting track. The operation is convenient, time-saving and labor-saving, and the operational safety of the construction personnel is improved.

[0005] In order to achieve these objects and other advantages according to the present invention, there is provided a push-type trolley turning system, wherein the trolley includes a pair of first wheels at one end of the trolley body and a pair of second wheels at the other end thereof, the push-type trolley turning system comprising:

[0006] A pair of track assemblies, each track assembly comprising a pair of straight tracks spaced apart along a conveying direction, a lifting track disposed between the pair of straight tracks, and a pair of limit posts disposed below the pair of straight tracks and on both sides of the lifting track, wherein the pair of lifting tracks correspondingly support a pair of first wheels, and the pair of lifting tracks drive the pair of first wheels to perform vertical reciprocating linear motion downward from a height equal to that of the straight tracks between the pair of limit posts;

[0007] A push block assembly includes a pair of push blocks corresponding to the pair of second wheels, a driving mechanism for driving the pair of push blocks to move linearly parallel to the straight track, and a pair of retraction mechanisms corresponding to the push blocks and forcing the corresponding push blocks to avoid the first wheels;

[0008] In which, the maximum height of the descent of the lifting track is not greater than the distance between the centers of the first wheel and the second wheel on the same side. The reciprocating linear motion of the lifting track is coordinated with the linear motion of the push block to prompt the first wheel to follow the corresponding lifting track from the same height as the straight track to first descend to the lowest point and then rise to the highest point. In the process, the push block pushes the corresponding second wheel to move from one side of the lifting track to the other side, thereby realizing the flipping of the trolley.

[0009] Preferably, a pair of straight rails corresponds to a pair of limit columns, each straight rail and the corresponding limit column form an integrally formed L-shaped structure, the two ends of the lifting rail are respectively slidably connected to the vertical sections of the corresponding L-shaped structure, and a hydraulic rod is provided under the lifting rail, and the telescopic end of the hydraulic rod is fixedly connected to the bottom of the lifting rail to drive the lifting rail to perform vertical reciprocating linear motion between a pair of limit columns.

[0010] Preferably, the driving mechanism includes a trolley, a pair of trolley tracks parallel to the straight track and a driving member that drives the trolley to move linearly along the trolley tracks, the trolley includes a horizontal plate, side plates arranged on both sides of the horizontal plate, each side plate is provided with a pulley, a pair of pulleys corresponds to a pair of trolley tracks and the pulleys are slidably connected to the corresponding trolley tracks, a push block is provided at the bottom of each side plate, the driving member includes a chain conveyor belt, a connecting rod fixed to one of the chains of the chain conveyor belt, the other end of the connecting rod is fixed to the horizontal plate, so that the horizontal plate moves with the chain conveyor belt and finally drives the push block to move.

[0011] Preferably, the retraction mechanism causes the push block to avoid the first wheel in the following specific manner: a fixed shaft is provided on the side wall of the side plate, the push block is rotatably connected to the fixed shaft and rotates around the fixed shaft, and the side plate is also provided with a limit block, which is located on the side of the push block away from the second wheel to limit the push block from rotating toward the side away from the second wheel.

[0012] Preferably, the diameters of the first wheel and the second wheel are the same, the length of the lifting track is slightly larger than the diameter of the first wheel, and the maximum height to which the lifting track descends is equal to the distance between the centers of the first wheel and the second wheel on the same side.

[0013] Preferably, the lifting track performs reciprocating uniform linear motion in the vertical direction, and the push block performs variable speed linear motion in the horizontal direction in coordination with the lifting track.

[0014] The trolley turning method uses the push-type trolley turning system to turn the trolley, which is specifically as follows:

[0015] When the trolley is in place, each first wheel is on the corresponding lifting rail, each second wheel is on the straight rail on one side of the corresponding lifting rail, and each pushing block is on the side of the corresponding second wheel away from the first wheel; the first wheel first descends with the corresponding lifting rail, and at the same time, the pushing block pushes the corresponding second wheel to move toward the other side of the lifting rail under the drive of the driving mechanism to cooperate with the descending of the first wheel. When the first wheel descends to the lowest point, the second wheel is directly above the first wheel, and then the first wheel rises again with the corresponding lifting rail. At the same time, the pushing block continues to push the corresponding second wheel to move under the drive of the driving mechanism to cooperate with the rising of the first wheel and transition to the straight rail on the other side of the lifting rail. When the first wheel rises to the highest point, the lifting rail and the straight rail are flush, the trolley is flipped over, and finally the pushing block retreats in the direction away from the second wheel, and the retraction mechanism prompts the pushing block to avoid the first wheel to allow the trolley to escape the restriction of the pushing block.

[0016] The present invention has at least the following beneficial effects:

[0017] The present invention is designed with straight rails, lifting rails, push blocks, driving mechanisms, and retracting mechanisms. When the trolley needs to be turned over, the trolley is first put into position. At this time, each first wheel is located on the corresponding lifting rail, each second wheel is located on the straight rail on one side of the corresponding lifting rail, and each push block is located on the side of the corresponding second wheel away from the first wheel; the first wheel first descends with the corresponding lifting rail, and at the same time, the push block, driven by the driving mechanism, pushes the corresponding second wheel to move toward the other side of the lifting rail to cooperate with the descent of the first wheel. When the first wheel descends to the lowest point, the second wheel is located directly above the first wheel, and then the first wheel is retracted with the corresponding lifting rail. The corresponding lifting track rises, and at the same time, the push block continues to push the corresponding second wheel to move under the drive of the driving mechanism to cooperate with the rise of the first wheel, and transitions to the straight track on the other side of the lifting track. When the first wheel rises to the highest point, the lifting track and the straight track are flush, the trolley flipping is completed, and finally the push block retreats in the direction away from the second wheel. The retraction mechanism prompts the push block to avoid the first wheel to free the trolley from the restriction of the push block; on the whole, the horizontal linear motion of the push block is coordinated with the vertical reciprocating linear motion of the lifting track to realize the automatic flipping of the trolley, which is convenient to operate, saves time and effort, and improves the operating safety of construction personnel.

[0018] Other advantages, objectives and features of the present invention will be reflected in part from the following description and will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a push-type trolley turning system according to one of the technical solutions of the present invention;

[0020] Figure 2 This is a schematic diagram of a push-type trolley turning system according to one of the technical solutions of the present invention turning over a trolley;

[0021] Figure 3 This is a schematic diagram of a push-type trolley turning system according to one of the technical solutions of the present invention turning over a trolley;

[0022] Figure 4 This is a schematic diagram of a push-type trolley turning system according to one of the technical solutions of the present invention turning over a trolley;

[0023] Figure 5 This is a schematic diagram of a push-type trolley turning system according to one of the technical solutions of the present invention when the trolley is turned over;

[0024] Figure 6 This is a schematic diagram of the push-type trolley turning system according to one of the technical solutions of the present invention after the trolley has turned over and the push block has retracted;

[0025] Figure 7 This is a schematic structural diagram of a push-type trolley turning system according to one of the technical solutions of the present invention;

[0026] Figure 8 This is a schematic structural diagram of the retraction mechanism described in one of the technical solutions of the present invention.

[0027] Description of the drawings: 1-trolley; 2-straight track; 3-lifting track; 4-hydraulic rod; 5-first support frame; 6-second support frame; 7-first wheel; 8-second wheel; 9-push block; 10-pulley; 11-chain conveyor belt; 12-trolley track; 13-side plate; 14-connecting rod; 15-limiting block; 16-fixed shaft; 17-limiting column. DETAILED DESCRIPTION

[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0029] It should be understood that terms such as “having,” “including,” and “comprising” used herein do not prescribe the existence or addition of one or more other elements or combinations thereof.

[0030] like Figure 1-8 As shown, the present invention provides a push-type trolley turning system, wherein the trolley 1 includes a pair of first wheels 7 at one end of the vehicle body and a pair of second wheels 8 at the other end. The push-type trolley turning system includes:

[0031] A pair of track assemblies, each track assembly includes a pair of straight tracks 2 spaced apart along the conveying direction, a lifting track 3 provided between the pair of straight tracks 2, and a pair of limit posts 17 provided below the pair of straight tracks 2 and on both sides of the lifting track 3, wherein the pair of lifting tracks 3 correspondingly support a pair of first wheels 7, and the pair of lifting tracks 3 drive the pair of first wheels 7 to perform vertical reciprocating linear motion downward from the same height as the straight tracks 2 between the pair of limit posts 17;

[0032] a push block assembly comprising a pair of push blocks 9 corresponding to the pair of second wheels 8, a driving mechanism for driving the pair of push blocks 9 to move linearly parallel to the straight track 2, and a pair of retraction mechanisms corresponding to the push blocks 9 and forcing the corresponding push blocks 9 to avoid the first wheels 7;

[0033] The maximum height to which the lifting track 3 descends is no greater than the distance between the centers of the first wheel 7 and the second wheel 8 on the same side. The reciprocating linear motion of the lifting track 3 cooperates with the linear motion of the push block 9, so that the first wheel 7 follows the corresponding lifting track 3 downward from the same height as the straight track 2 to the lowest point and then rises to the highest point. At the same time, the push block 9 pushes the corresponding second wheel 8 from one side of the lifting track 3 to the other side, thereby realizing the flipping of the trolley 1.

[0034] In the above technical solution, a pair of push blocks 9 corresponds to a pair of second wheels 8, and a pair of push blocks 9 push a pair of second wheels 8 from the straight track 2 on one side of the lifting track to the straight track on the other side; when the lifting track 3 rises to the highest point (that is, the position of the lifting track when the first wheel 7 of the trolley is initially placed on the lifting track), the top surfaces of the lifting track and the pair of straight tracks are flush so that the trolley can travel; the two ends of the lifting track correspond to a pair of straight tracks, and the two ends of the lifting track 3 are fitted with the corresponding straight tracks 2, and the straight track 2 is installed on the ground or other supporting surface through the first support frame 5 according to actual conditions, a pair of limiting columns 17 are respectively provided at the bottom of a pair of straight tracks 2 near one end of the lifting track 3, and a telescopic member is provided at the bottom of the lifting track 3, the telescopic end of the telescopic member is fixedly connected to the bottom of the lifting track 3, and the fixed end is installed on the ground or other supporting surface, the telescopic member can be a hydraulic rod 4 or an electric push rod to drive the lifting track 3 to perform vertical reciprocating linear motion between a pair of limiting columns 17, and the design of a pair of limiting columns 17 prevents the lifting track 3 from derailing horizontally;

[0035] The driving mechanism may include a trolley provided with a driving member, such as a trolley driven by a motor, and a travel track of the trolley, wherein the trolley is provided with a pair of push blocks 9, and the travel track is located above the straight track 2. When the trolley moves along the travel track, the push blocks 9 are driven to move, and then the push blocks 9 are driven to push the second wheel 8. In actual use, the travel track of the trolley is supported on the ground or other supporting surface by the second support frame 6 according to the situation;

[0036] The retraction mechanism may be such that the push block 9 is a retractable push block 9, for example, the push block 9 may be connected to the telescopic end of a telescopic rod, the fixed end of the telescopic rod being provided on the trolley, and the telescopic rod may be a hydraulic telescopic rod or an electric telescopic rod. When the trolley 1 is flipped over and the trolley retreats and encounters the first wheel 7, the push block 9 is retracted until it is no longer in contact with the first wheel 7, and then the trolley continues to retreat, so that the trolley 1 is free from the restriction of the push block 9.

[0037] The maximum height to which the lifting track 3 descends is not greater than the distance between the centers of the first wheel 7 and the second wheel 8 on the same side, that is, the maximum height to which the lifting track 3 descends is equal to or less than the distance between the centers of the first wheel 7 and the second wheel 8 on the same side. Preferably, the maximum height to which the lifting track 3 descends is equal to or slightly less than (e.g., 1 to 5 cm less than) the distance between the centers of the first wheel 7 and the second wheel 8 on the same side, and can be designed according to actual conditions;

[0038] The reciprocating linear motion of the lifting track 3 is coordinated with the linear motion of the push block 9. For example, the lifting track 3 performs reciprocating linear motion, and the push block 9 performs variable speed linear motion, or the lifting track 3 performs reciprocating variable speed linear motion, and the push block 9 performs uniform speed linear motion. The design can be based on actual conditions when used.

[0039] In this technical solution, during use, when the trolley 1 needs to be turned over, the trolley 1 to be replaced is lifted from the belt roaster onto the straight track 2 to put the trolley 1 in place, wherein the trolley 1 is in place as follows: each first wheel 7 is located on the corresponding lifting track 3, each second wheel 8 is located on the straight track 2 on one side of the corresponding lifting track 3, each push block 9 is located on the side of the corresponding second wheel 8 away from the first wheel 7, the first wheel 7 first descends with the corresponding lifting track 3, and at the same time, the push block 9, driven by the driving mechanism, pushes the corresponding second wheel 8 to move toward the other side of the lifting track 3 to cooperate with the descent of the first wheel 7 When the first wheel 7 drops to the lowest point, the second wheel 8 is located directly above the first wheel 7, and then the first wheel 7 rises with the corresponding lifting track 3. At the same time, the pushing block 9 continues to push the corresponding second wheel 8 to move under the drive of the driving mechanism to cooperate with the first wheel 7 to rise, and transition to the straight track 2 on the other side of the lifting track 3. When the first wheel 7 rises to the highest point, the lifting track 3 and the straight track 2 are flush, and the trolley 1 is flipped over. Finally, the pushing block 9 retreats in the direction away from the second wheel 8, and the retraction mechanism prompts the pushing block 9 to avoid the first wheel 7, so that the trolley 1 is free from the restriction of the pushing block 9. Figures 1 to 6 As shown, Figures 1 to 6 It shows the process of the lower plane of the trolley 1 turning from initially facing upward to facing downward (in actual use, the trolley 1 hoisted from the belt roaster onto the straight track 2 may have its upper plane facing upward or its lower plane facing upward);

[0040] The beneficial effect of adopting this technical solution is that, by designing the track, lifting track 3, push block 9, drive mechanism, and retraction mechanism, the linear motion of the push block 9 is coordinated with the reciprocating linear motion of the lifting track 3, thereby realizing the automatic flipping of the trolley 1, which is convenient to operate, saves time and effort, and improves the operational safety of construction personnel.

[0041] In another technical solution, a pair of straight rails 2 corresponds to a pair of limit posts 17, and each straight rail 2 and the corresponding limit post 17 form an integrally formed L-shaped structure. The two ends of the lifting rail 3 are respectively slidably connected to the vertical sections of the corresponding L-shaped structure. A hydraulic rod 4 is provided below the lifting rail 3, and the telescopic end of the hydraulic rod 4 is fixedly connected to the bottom of the lifting rail 3 to drive the lifting rail 3 to perform reciprocating linear motion in the vertical direction.

[0042] In the above technical solution, a pair of vertical sections of L-shaped structures are arranged relative to each other, that is, the vertical section in each L-shaped structure is close to the lifting rail 3, and each end of the lifting rail 3 is slidingly connected to the corresponding vertical section of the L-shaped structure, and the fixed end of the hydraulic rod 4 is installed on the ground or other supporting surface; in this technical solution, when in use, after the trolley 1 is in place, the hydraulic rod 4 and the drive mechanism are started synchronously to promote the reciprocating linear motion of the lifting rail 3 in the vertical direction to cooperate with the horizontal linear motion of the push block 9 to complete the flipping of the trolley 1; the beneficial effect of adopting this technical solution is that, by designing the hydraulic rod 4, a way for the lifting rail 3 to perform reciprocating linear motion in the vertical direction is provided, which has a simple structure and is easy to operate.

[0043] In another technical solution, the driving mechanism includes a trolley, a pair of trolley tracks 12 parallel to the straight track 2, and a driving member that drives the trolley to move linearly along the trolley tracks 12. The trolley includes a horizontal plate and side plates 13 provided on both sides of the horizontal plate. Each side plate 13 is provided with a pulley 10. A pair of pulleys 10 corresponds to a pair of trolley tracks 12 and the pulleys 10 are slidably connected to the corresponding trolley tracks 12. A push block 9 is provided at the bottom of each side plate 13. The driving member includes a chain conveyor belt 11 and a connecting rod 14 fixed to one of the chain rods of the chain conveyor belt 11. The other end of the connecting rod 14 is fixed to the horizontal plate, so that the horizontal plate moves with the movement of the chain conveyor belt 11 and finally drives the push block 9 to move.

[0044] In the above technical solution, specifically, a pair of trolley tracks 12 are installed on the ground or other supporting surface (the ground or supporting surface is not shown in the figure) through the second support frame 6. The trolley track 12 is preferably located above the straight track 2. A pair of side plates 13 corresponds to a pair of tracks. The chain-type conveyor belt 11 is a conveyor belt driven by an assembled motor reducer commonly used by those skilled in the art. Its belt body is composed of a plurality of chain rods. The belt body of the chain-type conveyor belt 11 is supported and installed on the second support frame 6; one end of the connecting rod 14 is fixedly connected to one of the chain rods of the chain-type conveyor belt 11, and the other end is fixedly connected to the horizontal plate to drive the horizontal plate and the push block 9 to move with the movement of the chain rod;

[0045] The beneficial effect of adopting this technical solution is that, by designing the trolley track 12, horizontal plate, side plate 13, pulley 10, chain conveyor belt 11, and connecting rod 14, a driving mechanism structure is provided, which is easy to obtain materials, can be installed and used on site, and is easy and simple to use and has a good driving effect.

[0046] In another technical solution, the retraction mechanism causes the push block 9 to avoid the first wheel 7 in the following specific manner: a fixed shaft 16 is provided on the side wall of the side plate 13, the push block 9 is rotatably connected to the fixed shaft 16 and rotates around the fixed shaft 16, and a limit block 15 is further provided on the side plate 13, and the limit block 15 is located on the side of the push block 9 away from the second wheel 8 to limit the push block 9 from rotating toward the side away from the second wheel 8; specifically, a pair of annular limit plates are coaxially provided on the fixed shaft 16, and the top of the push block 9 is arranged in series on the fixed shaft 16 between the pair of annular limit blocks 15, and the length of the fixed shaft 16 between the pair of annular limit plates is slightly larger than the thickness of the top of the push block 9 (such as 3 to 5 mm larger) to limit the push block 9 from moving significantly along the axial direction of the fixed shaft 16 on the fixed shaft 16; the push block 9 in this technical solution is similar to a one-way valve When in use, the pushing block 9 is in a vertical state under the action of gravity in a natural state. When the trolley 1 needs to be flipped, the pushing block 9 is located on the side corresponding to the second wheel 8. Due to the heavy weight of the trolley 1 and the limitation of the limit block 15, the pushing block 9 directly pushes the trolley 1 to move along the straight track 2 under the drive of the driving mechanism, and cooperates with the speed of the lifting track 3 to enable the trolley 1 to flip over. When the trolley 1 is flipped over, the pushing block 9 encounters the first wheel 7 during the retreat process. At this time, since the retreat direction is opposite to the propulsion direction, the pushing block 9 can rotate around the fixed axis 16 to avoid the first wheel 7 until it is out of the way of the first wheel 7. At this time, the trolley 1 is also out of the limitation of the pushing block 9. The beneficial effect of adopting this technical solution is that, by designing the fixed axis 16 and the limit block 15, a retraction mechanism structure is provided, which has a simple structure and can automatically prompt the pushing block 9 to avoid the first wheel 7. It is easy to use and has good effect.

[0047] In another technical solution, the diameters of the first wheel 7 and the second wheel 8 are the same, the length of the lifting track 3 is slightly larger than the diameter of the first wheel 7, and the maximum height to which the lifting track 3 can descend is equal to the distance between the centers of the first wheel 7 and the second wheel 8 on the same side;

[0048] In the above technical solution, the diameters of the first wheel 7 and the second wheel 8 are the same, the maximum height to which the lifting track 3 descends is equal to the distance between the center of the first wheel 7 and the center of the second wheel 8 on the same side, and the length of the lifting track 3 is slightly larger than the diameter of the first wheel 7. For example, the length of the lifting track 3 is 2 to 4 mm larger than the diameter of the first wheel 7, so that the second wheel 8 can transition from one side of the lifting track 3 to the other side. In actual use, the length of the lifting track 3 is designed according to the diameters of the first wheel 7 and the second wheel 8, so that the second wheel 8 can smoothly transition from one side of the lifting track 3 to the other side. The beneficial effect of adopting this technical solution is that a size design standard for the length of the first wheel 7, the second wheel 8, the lifting track 3 and the maximum height to which the lifting track 3 descends is provided, and the various components cooperate to make it easier to flip the trolley 1.

[0049] In another technical solution, the lifting track 3 performs reciprocating uniform linear motion in the vertical direction, and the push block 9 performs variable speed linear motion in the horizontal direction in coordination with the lifting track 3; the beneficial effect obtained by adopting this technical solution is that such a combination is easier to operate and implement in actual use.

[0050] The trolley turning method is characterized in that the trolley 1 is turned over by using the above-mentioned push-type trolley turning system, specifically as follows:

[0051] When the trolley 1 is in the in-place state, each first wheel 7 is located on the corresponding lifting rail 3, each second wheel 8 is located on the straight rail 2 on one side of the corresponding lifting rail 3, and each push block 9 is located on the side of the corresponding second wheel 8 away from the first wheel 7. The first wheel 7 first descends with the corresponding lifting rail 3, and at the same time, the push block 9 pushes the corresponding second wheel 8 to move toward the other side of the lifting rail 3 under the drive of the driving mechanism to cooperate with the descent of the first wheel 7. When the first wheel 7 descends to the lowest point, the second wheel 8 is located directly above the first wheel 7, and then the first wheel 7 rises again with the corresponding lifting rail 3. At the same time, the push block 9 continues to push the corresponding second wheel 8 to move under the drive of the driving mechanism to cooperate with the rise of the first wheel 7 and transition to the straight rail 2 on the other side of the lifting rail 3. When the first wheel 7 rises to the highest point, the lifting rail 3 and the straight rail 2 are flush, the trolley 1 is flipped over, and finally the push block 9 retreats in the direction away from the second wheel 8. The retraction mechanism prompts the push block 9 to avoid the first wheel 7 so that the trolley 1 is free from the restriction of the push block 9. Figures 1 to 6 As shown, in actual use, the trolley 1 hoisted from the belt roasting machine onto the straight track 2 may have its upper surface facing upward or its lower surface facing upward, depending on the actual situation.

[0052] The number of devices and processing scales described herein are intended to simplify the description of the present invention. Applications, modifications, and variations of the push-type trolley turning system of the present invention will be apparent to those skilled in the art.

[0053] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A push-type trolley turning system, wherein the trolley comprises a pair of first wheels at one end of the trolley body and a pair of second wheels at the other end thereof, characterized in that: The push-type trolley turning system includes: A pair of track assemblies, each track assembly comprising a pair of straight tracks spaced apart along a conveying direction, a lifting track disposed between the pair of straight tracks, and a pair of limit posts disposed below the pair of straight tracks and on both sides of the lifting track, wherein the pair of lifting tracks correspondingly support a pair of first wheels, and the pair of lifting tracks drive the pair of first wheels to perform vertical reciprocating linear motion downward from a height equal to that of the straight tracks between the pair of limit posts; A push block assembly includes a pair of push blocks corresponding to the pair of second wheels, a driving mechanism for driving the pair of push blocks to move linearly parallel to the straight track, and a pair of retraction mechanisms corresponding to the push blocks and forcing the corresponding push blocks to avoid the first wheels; The maximum height to which the lifting track descends is no greater than the distance between the centers of the first wheel and the second wheel on the same side. The reciprocating linear motion of the lifting track cooperates with the linear motion of the push block, so that the first wheel follows the corresponding lifting track and descends from the same height as the straight track to the lowest point and then rises to the highest point. At the same time, the push block pushes the corresponding second wheel to move from one side of the lifting track to the other side, thereby realizing the flipping of the trolley. The driving mechanism includes a trolley, a pair of trolley tracks parallel to the straight track, and a driving member that drives the trolley to move linearly along the trolley tracks, the trolley includes a horizontal plate, side plates provided on both sides of the horizontal plate, each side plate is provided with a pulley, a pair of pulleys corresponds to a pair of trolley tracks and the pulleys are slidably connected to the corresponding trolley tracks, and a push block is provided at the bottom of each side plate, the driving member includes a chain conveyor belt, a connecting rod fixed to one of the chain rods of the chain conveyor belt, the other end of the connecting rod is fixed to the horizontal plate, so that the horizontal plate moves with the movement of the chain conveyor belt and finally drives the push block to move; A pair of straight rails corresponds to a pair of limit columns, and each straight rail and the corresponding limit column form an integrally formed L-shaped structure. The two ends of the lifting rail are respectively slidably connected to the vertical sections of the corresponding L-shaped structure. A hydraulic rod is provided under the lifting rail, and the telescopic end of the hydraulic rod is fixedly connected to the bottom of the lifting rail to drive the lifting rail to perform vertical reciprocating linear motion between a pair of limit columns.

2. The push-type trolley turning system according to claim 1, characterized in that: The specific manner in which the retraction mechanism causes the push block to avoid the first wheel is as follows: a fixed shaft is provided on the side wall of the side plate, the push block is rotatably connected to the fixed shaft and rotates around the fixed shaft, and the side plate is also provided with a limit block, which is located on the side of the push block away from the second wheel to limit the push block from rotating toward the side away from the second wheel.

3. The push-type trolley turning system according to claim 1, characterized in that: The first wheel and the second wheel have the same diameter, the length of the lifting track is slightly larger than the diameter of the first wheel, and the maximum height of the lifting track is equal to the distance between the centers of the first wheel and the second wheel on the same side.

4. The push-type trolley turning system according to claim 1, wherein: The lifting track performs reciprocating uniform linear motion in the vertical direction, and the push block performs variable speed linear motion in the horizontal direction in coordination with the lifting track.

5. Trolley turning method, characterized in that: The trolley is flipped using the push-type trolley flipping system as described in any one of claims 1 to 4, specifically as follows: When the trolley is in place, each first wheel is on the corresponding lifting rail, each second wheel is on the straight rail on one side of the corresponding lifting rail, and each pushing block is on the side of the corresponding second wheel away from the first wheel; the first wheel first descends with the corresponding lifting rail, and at the same time, the pushing block pushes the corresponding second wheel to move toward the other side of the lifting rail under the drive of the driving mechanism to cooperate with the descending of the first wheel. When the first wheel descends to the lowest point, the second wheel is directly above the first wheel, and then the first wheel rises again with the corresponding lifting rail. At the same time, the pushing block continues to push the corresponding second wheel to move under the drive of the driving mechanism to cooperate with the rising of the first wheel and transition to the straight rail on the other side of the lifting rail. When the first wheel rises to the highest point, the lifting rail and the straight rail are flush, the trolley is flipped over, and finally the pushing block retreats in the direction away from the second wheel, and the retraction mechanism prompts the pushing block to avoid the first wheel to allow the trolley to escape the restriction of the pushing block.

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