Closed cement packaging finished product sending platform framework
By designing a closed-loop cement packaging finished product delivery platform architecture, a sealed box is formed by a rotating seat, a top seat, a storage box, and a baffle. Combined with a rotating and sealing mechanism, the automated packaging, transfer, and unloading of cement finished products are realized, solving the problem of dust flying during the transfer of cement finished products and improving the protection of the working environment and equipment.
Patent Information
- Application Number
- CN202512018973.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-30
- Publication Date
- 2026-02-24
AI Technical Summary
The packaging of finished cement products generates a large amount of dust during the shipping and transportation process, which affects the working environment and the health of workers, and also damages mechanical equipment.
Design a closed cement packaging finished product delivery platform architecture, which forms a closed box body through a rotating seat, top seat, storage box, bottom plate and baffle, and combines a rotating mechanism, a sealing mechanism and a pulling mechanism to realize the automated packaging, transfer and unloading of cement finished products.
It effectively blocks dust from flying, purifies the working environment, protects the health of workers, reduces damage to mechanical equipment, and improves the level of automation and the smoothness of operation.
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Figure CN121553445A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the technical field of cement packaging finished product delivery platform, and particularly relates to a closed cement packaging finished product delivery platform architecture. Background Technology
[0002] The packaging workshop of a cement production plant is a key link in the cement production process. It is responsible for packaging, stacking, loading and shipping finished cement. Cement packaging usually uses automatic packaging machines to bag the cement, and the packaged cement bags are sent to the stacking stage via conveyor lines.
[0003] Chinese patent CN219031116U discloses a closed cement packaging finished product delivery platform architecture, including a loading head, a support plate one, a support plate two, a conveyor belt one, a right-angle conveyor belt two, the right-angle conveyor belt being disposed between the conveyor belt one and the conveyor belt two, and also includes a dust collection component one for absorbing dust from the loading head.
[0004] As is known from existing technology, cement packaging products are frequently moved during transportation, generating a lot of dust. This dust accumulation around the shipping platform affects the working environment and the health of the workers. The dust in the working environment can also cause trouble for later cleaning and damage to mechanical equipment. Summary of the Invention
[0005] Based on the technical problems existing in the background technology, cement packaging products are frequently moved during transportation, generating a lot of dust. This dust around the delivery platform affects the working environment and the health of the workers. The dust in the working environment will cause trouble for later cleaning and damage to mechanical equipment. The present invention proposes a closed cement packaging product delivery platform architecture.
[0006] The present invention proposes a closed cement packaging finished product delivery platform architecture, including a rotating base and a top base. Multiple mounting plates are fixedly connected to the top base. The rotating base is rotatably connected to the outer side of the top base. Mounting parts are provided on both sides of the rotating base. Storage boxes are fixedly connected to the bottom of each of the two mounting parts. A bottom plate is rotatably connected to the outer surface of one side of the bottom of the storage box. A baffle is rotatably connected to the inner wall of the other side of the bottom of the storage box. A top plate is fixedly provided at the end of the bottom plate away from the baffle. A traction mechanism is slidably connected to the top plate, and the traction mechanism includes a connecting sleeve and a pull shaft; A rotating mechanism is provided between the rotating seat and the top seat, and the rotating mechanism is used to drive the rotating seat to rotate relative to the top seat. The storage box is equipped with a sealing mechanism for driving the baffle to rotate. The sealing mechanism includes two symmetrically arranged traction shafts and two threaded rods. The storage box, the bottom plate, and the baffle form a box body, which is used to hold finished cement packaging products.
[0007] Preferably, the rotating mechanism includes an external gear and an internal gear. The external gear is fixedly installed at the bottom of the rotating seat, and the internal gear is meshed inside the external gear. A first motor is fixedly installed on the top seat, and the drive end of the first motor is fixedly connected to the internal gear.
[0008] Preferably, the lower end of the connecting sleeve is movably connected to the top plate, a fixed shaft that cooperates with the connecting sleeve is fixedly connected to the mounting part, the fixed shaft is inserted into the connecting sleeve, a spring is provided in the connecting sleeve, the two ends of the spring are fixedly connected to the fixed shaft and the bottom of the connecting sleeve respectively, a cylinder is fixedly installed on the top seat, a push plate is fixedly connected to the driving end of the cylinder, the upper end of the pull shaft is an inverted L-shape and passes through the mounting part, and one end of the push plate is engaged with the lower surface of the upper end of the pull shaft.
[0009] Preferably, the lower end of the connecting sleeve is rotatably connected to a movable block, and the two sides of the top plate are provided with sliding grooves, and the two ends of the movable block slide on the sliding grooves through protrusions.
[0010] Preferably, the connecting sleeve has an opening on one side, the lower end of the fixed shaft has a limit block, the limit block slides up and down along the opening, the top seat is fixedly connected to the limit shaft, and the limit shaft passes through the end of the push plate away from the pull shaft.
[0011] Preferably, the two threaded rods are rotatably disposed on two sides of the storage box, one end of the traction shaft is rotatably connected to the side of the baffle, and the other end of the traction shaft is rotatably connected to a slider. The threaded rods thread through the sliders. A positioning shaft is fixedly connected to the side of the storage box, and the traction shaft is mounted on the positioning shaft. A drive mechanism is provided on the storage box, and the drive mechanism is connected to the two threaded rods. The drive mechanism is used to realize the rotation of the two threaded rods.
[0012] Preferably, positioning grooves are fixedly connected to both sides of the storage box, and one end of the slider is slidably installed in the positioning groove.
[0013] Preferably, the drive mechanism includes a linkage shaft and a second motor. The drive end of the second motor is fixedly connected to a second connecting block. The upper ends of the two threaded rods are fixedly connected to first connecting blocks. The ends of the two first connecting blocks away from the threaded rods are rotatably connected to the two ends of the linkage shaft, respectively. The ends of the second connecting blocks away from the drive end are rotatably connected to the middle section of the linkage shaft.
[0014] Preferably, the mounting plates are inverted L-shaped, and the upper end of the mounting plates has multiple mounting holes.
[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention forms a sealed box by enclosing the storage box, bottom plate and baffle, which seals and transports the finished cement packaging products throughout the process. It blocks the dust problem caused by the frequent movement of cement bags during the traditional delivery process from the source. It not only effectively purifies the working environment and protects the health of the staff, but also avoids the corrosion of mechanical equipment by dust and greatly reduces the workload of subsequent cleaning and maintenance.
[0016] 2. This invention relies on the coordinated operation of a rotating mechanism, a sealing mechanism, and a traction mechanism to achieve automated and continuous operation of loading, sealing, transferring, and unloading of cement packaging products. The rotating mechanism drives the rotating seat to flexibly adjust its position through gear meshing, and the dual storage box design improves the transfer and turnover efficiency. The sealing mechanism uses the linkage of a motor, a threaded rod, and a traction shaft to achieve precise opening and closing of the baffle, which has both guiding loading and airtight protection functions. The traction mechanism, with the help of spring buffer and cylinder drive, ensures the support stability during loading and achieves quick and convenient unloading. The overall structure is compact and efficient in operation, significantly improving the automation level and smoothness of cement packaging product delivery. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the vertical cross-sectional structure of a closed cement packaging finished product delivery platform architecture proposed in this invention; Figure 2 This is a bottom view of the structure of a sealed cement packaging finished product delivery platform proposed in this invention. Figure 3 This is a top view of the structure of a sealed cement packaging finished product delivery platform proposed in this invention. Figure 4 This is a side view of the structure of a sealed cement packaging finished product delivery platform proposed in this invention. Figure 5 This is a schematic diagram of the planar structure of a sealed cement packaging finished product delivery platform proposed in this invention; Figure 6 This is a partial structural diagram of a sealed cement packaging finished product delivery platform architecture proposed in this invention; Figure 7 This is a schematic diagram of the traction mechanism; Figure 8 This is a schematic diagram of the packaging mechanism; Figure 9 This is a schematic diagram of the connection structure of the baffle, bottom plate, and top plate; Figure 10 This is a schematic diagram of the drive mechanism.
[0018] In the diagram: 1 Rotating seat, 2 Top seat, 3 Mounting part, 4 Pull shaft, 5 Push plate, 6 Connecting sleeve, 7 Cylinder, 8 First motor, 9 Limiting shaft, 10 Storage box, 11 Baffle, 12 Top plate, 13 Linkage shaft, 14 Traction shaft, 15 Threaded rod, 16 Base plate, 17 Fixed shaft, 18 Second motor, 19 Mounting plate, 20 Internal gear, 21 External gear, 22 Spring, 23 Limiting block, 24 Movable block, 25 Slide groove, 26 Positioning groove, 27 First connecting block, 28 Slider, 29 Positioning shaft, 30 Second connecting block. Detailed Implementation
[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.
[0020] Reference Figures 1-6 A sealed cement packaging finished product delivery platform structure includes a rotating seat 1 and a top seat 2. Multiple mounting plates 19 are fixedly connected to the top seat 2. The rotating seat 1 is rotatably connected to the outer side of the top seat 2. Mounting parts 3 are provided on both sides of the rotating seat 1. Storage boxes 10 are fixedly connected to the bottom of the two mounting parts 3. A bottom plate 16 is rotatably connected to the outer surface of one side of the bottom of the storage box 10. A baffle 11 is rotatably connected to the inner wall of the other side of the bottom of the storage box 10. A top plate 12 is fixedly provided at the end of the bottom plate 16 away from the baffle 11. A traction mechanism is slidably connected to the top plate 12. The traction mechanism includes a connecting sleeve 6 and a pull shaft 4. A rotating mechanism is provided between the rotating seat 1 and the top seat 2. The rotating mechanism is used to drive the rotating seat 1 to rotate relative to the top seat 2. The storage box 10 is equipped with a sealing mechanism for driving the baffle 11 to rotate. The sealing mechanism includes two symmetrically arranged traction shafts 14 and two threaded rods 15. The storage box 10, the bottom plate 16, and the baffle 11 form a box body, which is used to hold finished cement packaging products.
[0021] Multiple mounting plates 19 are inverted L-shaped, and multiple mounting holes are provided at the upper end of the mounting plates 19. The mounting plates 19 are fixedly connected to the top of the factory building through the mounting holes, and the top bracket 2 is installed and fixed through the mounting plates 19.
[0022] Reference Figure 2The rotating mechanism includes an external gear 21 and an internal gear 20. The external gear 21 is fixedly installed at the bottom of the rotating base 1, and the internal gear 20 is meshed inside the external gear 21. A first motor 8 is fixedly installed on the top base 2, and the drive end of the first motor 8 is fixedly connected to the internal gear 20. When transferring the cement packaged products, the rotating base 1 needs to be rotated to adjust the cement packaged products inside the box. The first motor 8 drives the internal gear 20 to rotate through its drive end. The internal gear 20 meshes with the external gear 21. As the internal gear 20 rotates, it drives the external gear 21 to rotate. Then, the external gear 21 rotates synchronously with the rotating base 1, causing the box to change position, thereby realizing the transfer and delivery of the cement packaged products.
[0023] Reference Figures 6-9 The lower end of the connecting sleeve 6 is movably connected to the top plate 12. A fixed shaft 17 that works with the connecting sleeve 6 is fixedly connected to the mounting part 3. The fixed shaft 17 is inserted into the connecting sleeve 6. A spring 22 is provided inside the connecting sleeve 6. The two ends of the spring 22 are fixedly connected to the fixed shaft 17 and the bottom of the connecting sleeve 6, respectively. A cylinder 7 is fixedly installed on the top seat 2. A push plate 5 is fixedly connected to the drive end of the cylinder 7. The upper end of the pull shaft 4 is an inverted L-shape and passes through the mounting part 3. One end of the push plate 5 is engaged with the lower surface of the upper end of the pull shaft 4. When unloading the cement packaging products, firstly, rotate the rotating seat 1 so that one end of the push plate 5 rotates to a position below the upper end of the pull shaft 4 and engages with it. The cylinder 7 drives the push plate 5 to rise through the drive end, and then the push plate 5 drives the pull shaft 4 to rise. The pull shaft 4 drives the connecting sleeve 6 to rise. The lower end of the connecting sleeve 6 pulls the top plate 12 to rotate relative to the storage box 10, thereby causing the bottom plate 16 to disengage from the bottom of the storage box 10. As a result, the cement packaging products stored inside the box will fall down, achieving the unloading effect. The rotation of the bottom plate 16 is achieved by pulling the connecting sleeve 6 upward to overcome the elastic force of the spring 22. When the box is filled with cement packaging products, the bottom plate 16 is kept horizontal under the elastic force of the spring 22, thus supporting the cement packaging products inside the box.
[0024] The lower end of the connecting sleeve 6 is rotatably connected to a movable block 24. Slide grooves 25 are provided on both sides of the top plate 12. The two ends of the movable block 24 slide on the slide grooves 25 via protrusions. The connecting sleeve 6 and the top plate 12 are movably connected. When the connecting sleeve 6 pulls the top plate 12 to rotate, the position and angle of the lower end of the connecting sleeve 6 relative to the top plate 12 will change. The connecting sleeve 6 adapts to the angle change by rotating with the movable block 24, and the movable block 24 adapts to the position change by sliding relative to the top plate 12.
[0025] An opening is provided on one side of the connecting sleeve 6, and a limit block 23 is provided at the lower end of the fixed shaft 17. The limit block 23 slides up and down along the opening. A limit shaft 9 is fixedly connected to the top seat 2, and the limit shaft 9 passes through the end of the push plate 5 away from the pull shaft 4. The limit shaft 9 plays a limiting role, limiting the angle of the push plate 5 so that it can properly align with the pull shaft 4. The lower end of the fixed shaft 17 slides relative to the connecting sleeve 6 through the limit block 23. The limit block 23 plays a certain limiting and connecting role, allowing the fixed shaft 17 to slide up and down within the range of the connecting sleeve 6.
[0026] Two threaded rods 15 are rotatably mounted on the two sides of the storage box 10. One end of the traction shaft 14 is rotatably connected to the side of the baffle 11, and the other end of the traction shaft 14 is rotatably connected to the slider 28. The threaded rods 15 thread through the slider 28. A positioning shaft 29 is fixedly connected to the side of the storage box 10. The traction shaft 14 is mounted on the positioning shaft 29. A drive mechanism is provided on the storage box 10. The drive mechanism is connected to the two threaded rods 15 and is used to realize the rotation of the two threaded rods 15. The drive mechanism causes the two threaded rods 15 to rotate. The rotation of the threaded rods 15 can drive the two sliders 28 to move up and down. When the positioning shaft 29 moves, it will pull one end of the traction shaft 14 to move. When the traction shaft 14 is pulled, it will slide and flip relative to the positioning shaft 29. When the traction shaft 14 flips, it will pull the baffle 11, so that the baffle 11 is close to the storage box 10, thereby sealing one side of the storage box 10. The cement packaged product slides down the surface of the baffle 11 into the storage box 10. Then the drive mechanism adjusts the sealing mechanism to seal the cement packaged product in the box, which is convenient for transfer and delivery.
[0027] Positioning grooves 26 are fixedly connected to both sides of the storage box 10, and one end of the slider 28 is slidably installed in the positioning groove 26. The positioning groove 26 limits the slider 28 and restricts the angle of the slider 28, so that when the threaded rod 15 rotates, the slider 28 can slide up and down relative to the positioning groove 26, thereby driving one end of the traction shaft 14 to move.
[0028] Reference Figure 10 The drive mechanism includes a linkage shaft 13 and a second motor 18. A second connecting block 30 is fixedly connected to the drive end of the second motor 18. First connecting blocks 27 are fixedly connected to the upper ends of the two threaded rods 15. The ends of the two first connecting blocks 27 furthest from the threaded rods 15 are rotatably connected to both ends of the linkage shaft 13, and the end of the second connecting block 30 furthest from the drive end is rotatably connected to the middle section of the linkage shaft 13. The second motor 18 drives the second connecting blocks 30 to rotate via its drive end, causing the second connecting blocks 30 to deflect and thus move the linkage shaft 13 in a circular motion. This causes the two ends of the linkage shaft 13 to pull the first connecting blocks 27 to rotate around the threaded rods 15, thereby achieving the effect of rotating the two threaded rods 15.
[0029] One end of the invention is the location of a truck, and the other end is a belt conveyor for transporting finished cement packages. The invention transfers cement bags from the belt conveyor to the truck in sequence.
[0030] When one end of the mounting part 3 is close to the end of the belt conveyor, the second motor 18 drives the second connecting block 30 to rotate via the drive end. When the second connecting block 30 deflects, it drives the linkage shaft 13 to move. The two ends of the linkage shaft 13 drive the first connecting block 27 to deflect, which in turn causes the two threaded rods 15 to rotate. The slider 28 is threaded onto the threaded rod 15. The slider 28 is limited in angle by the positioning groove 26. As the threaded rod 15 rotates, the slider 28 can move up and down. When the slider 28 moves upward, it pushes the baffle 11 away from the storage area via the traction shaft 14. The storage box 10 is opened so that the baffle 11 is open relative to the storage box 10. The opened baffle 11 will form a guide structure, and the cement bag can slide along the surface of the baffle 11 into the storage box 10. The cement bag will fall into the bottom plate 16. A top plate 12 is provided behind the bottom plate 16. The top plate 12 is connected to the mounting part 3 through the connecting sleeve 6 and the fixed shaft 17. A spring 22 is provided between the bottom plate 16 and the fixed shaft 17. The bottom plate 16 can be kept horizontal by the elastic force of the threaded rod 15. When the cement bag slides onto the bottom plate 16, the elastic spring 22 also plays a buffering role.
[0031] After the cement bag slides into the storage box 10, the drive mechanism drives the two threaded rods 15 to rotate in opposite directions, causing the slider 28 to move downward. The slider 28 pulls one end of the traction shaft 14 downward, while the positioning shaft 29 presses against one side of the traction shaft 14 to limit it, causing the traction shaft 14 to gradually rotate. When the traction shaft 14 rotates, it will drive the baffle 11 to move closer to the storage box 10 and close it. The baffle 11, the storage box 10 and the bottom plate 16 form a box. The cement bag is sealed in the box, which can effectively reduce dust flying during transportation and delivery, keep the working environment clean and protect the health of the staff.
[0032] The rotating mechanism causes the rotating seat 1 to rotate relative to the top seat 2. The first motor 8 drives the internal gear 20 to rotate through the drive end. As the internal gear 20 rotates, it can drive the external gear 21 to move. The external gear 21 drives the rotating seat 1 to rotate synchronously, thereby adjusting the position of the storage box 10 at one end and transferring the cement bag to the side of the truck.
[0033] The push plate 5 and cylinder 7 are fixedly installed on the side near the unloading of cement bags. When the storage box 10 moves to the position above the truck bed, the upper end of the pull shaft 4 on this side will move to the position above one end of the push plate 5. When the cylinder 7 drives the push plate 5 to move upward through the drive end, one end of the push plate 5 pushes against the upper end of the pull shaft 4 to drive the connecting sleeve 6 to move upward. When the connecting sleeve 6 moves upward, it will slide relative to the top plate 12 through the movable block 24. The connecting sleeve 6 pulls one end of the top plate 12 to make it rotate. When one end of the top plate 12 is upward, one end of the bottom plate 16 is downward, and the cement bags in the storage box 10 will fall directly onto the conveyor belt, thereby completing the transfer and delivery of cement bags.
[0034] During use, the cement bag is sealed inside the box, reducing dust in the working environment during delivery and reducing the workload of staff.
[0035] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.
Claims
1. A sealed cement packaging finished product delivery platform architecture, characterized in that, Includes a rotating seat (1) and a top seat (2). Multiple mounting plates (19) are fixedly connected to the top seat (2). The rotating seat (1) is rotatably connected to the outer side of the top seat (2). Mounting parts (3) are provided on both sides of the rotating seat (1). Storage boxes (10) are fixedly connected to the bottom of both mounting parts (3). A bottom plate (16) is rotatably connected to the outer surface of one side of the bottom of the storage box (10). A baffle (11) is rotatably connected to the inner wall of the other side of the bottom of the storage box (10). A top plate (12) is fixedly provided at the end of the bottom plate (16) away from the baffle (11). A traction mechanism is slidably connected to the top plate (12), the traction mechanism including a connecting sleeve (6) and a pull shaft (4); A rotating mechanism is provided between the rotating seat (1) and the top seat (2), and the rotating mechanism is used to drive the rotating seat (1) to rotate relative to the top seat (2); The storage box (10) is provided with a sealing mechanism for driving the baffle (11) to rotate. The sealing mechanism includes two symmetrically arranged traction shafts (14) and two threaded rods (15). The storage box (10), the bottom plate (16), and the baffle (11) form a box body, which is used to hold cement packaging finished products.
2. The sealed cement packaging finished product delivery platform architecture according to claim 1, characterized in that, The rotating mechanism includes an external gear (21) and an internal gear (20). The external gear (21) is fixedly installed at the bottom of the rotating seat (1), and the internal gear (20) is meshed inside the external gear (21). A first motor (8) is fixedly installed on the top seat (2), and the driving end of the first motor (8) is fixedly connected to the internal gear (20).
3. The sealed cement packaging finished product delivery platform architecture according to claim 1, characterized in that, The lower end of the connecting sleeve (6) is movably connected to the top plate (12). A fixed shaft (17) that works with the connecting sleeve (6) is fixedly connected to the mounting part (3). The fixed shaft (17) is inserted into the connecting sleeve (6). A spring (22) is provided inside the connecting sleeve (6). The two ends of the spring (22) are fixedly connected to the bottom of the fixed shaft (17) and the connecting sleeve (6) respectively. A cylinder (7) is fixedly installed on the top seat (2). A push plate (5) is fixedly connected to the driving end of the cylinder (7). The upper end of the pull shaft (4) is an inverted L-shape and passes through the mounting part (3). One end of the push plate (5) is engaged with the lower surface of the upper end of the pull shaft (4).
4. The sealed cement packaging finished product delivery platform architecture according to claim 1, characterized in that, The lower end of the connecting sleeve (6) is rotatably connected to a movable block (24), and the top plate (12) is provided with sliding grooves (25) on both sides. The two ends of the movable block (24) slide on the sliding grooves (25) through protrusions.
5. The sealed cement packaging finished product delivery platform architecture according to claim 3, characterized in that, The connecting sleeve (6) has an opening on one side, and the lower end of the fixed shaft (17) is provided with a limiting block (23). The limiting block (23) slides up and down along the opening. The top seat (2) is fixedly connected to a limiting shaft (9), and the limiting shaft (9) passes through the push plate (5) and is away from the pull shaft (4).
6. The sealed cement packaging finished product delivery platform architecture according to claim 1, characterized in that, Two threaded rods (15) are respectively rotatably mounted on two sides of the storage box (10). One end of the traction shaft (14) is rotatably connected to the side of the baffle (11). The other end of the traction shaft (14) is rotatably connected to a slider (28). The threaded rods (15) thread through the slider (28). A positioning shaft (29) is fixedly connected to the side of the storage box (10). The traction shaft (14) is mounted on the positioning shaft (29). A drive mechanism is provided on the storage box (10). The drive mechanism is connected to the two threaded rods (15). The drive mechanism is used to realize the rotation of the two threaded rods (15).
7. The sealed cement packaging finished product delivery platform architecture according to claim 6, characterized in that, The storage box (10) has positioning grooves (26) fixedly connected to both sides of the storage box (10), and one end of the slider (28) is slidably installed in the positioning grooves (26).
8. The sealed cement packaging finished product delivery platform architecture according to claim 7, characterized in that, The drive mechanism includes a linkage shaft (13) and a second motor (18). The drive end of the second motor (18) is fixedly connected to a second connecting block (30). The upper ends of the two threaded rods (15) are fixedly connected to first connecting blocks (27). The ends of the two first connecting blocks (27) away from the threaded rods (15) are rotatably connected to the two ends of the linkage shaft (13), respectively. The end of the second connecting block (30) away from the drive end is rotatably connected to the middle section of the linkage shaft (13).
9. The sealed cement packaging finished product delivery platform architecture according to claim 1, characterized in that, The mounting plates (19) are inverted L-shaped, and the upper end of the mounting plates (19) has multiple mounting holes.
Citation Information
Patent Citations
Closed cement packaging finished product sending platform framework
CN219031116U