A bidirectional continuous casting machine for ball-milled cast iron manhole covers

Abstract

The application discloses a bidirectional continuous casting machine for ball-milling cast iron well covers, relates to the technical field of well cover continuous casting, and solves the technical problem that a large change in the position of a casting opening during casting affects casting, and comprises a sliding rail, a track trolley, a rack and a main shaft, the main shaft is fixedly connected with a walking gear, the inner wall of the rack is fixedly connected with two supporting seats on one side, the two supporting seats are respectively rotatably connected with a main rack and an auxiliary rack, and the main rack and the auxiliary rack are respectively separately engaged with the two sides of the walking gear, the application flexibly adjusts the discharging direction of the casting opening, ensures that the metal melt accurately flows into the preset mold cavity, optimizes the casting track, reduces the risk of metal melt splashing or deviation, and reduces the working strength of manual adjustment of workers.

Description

Technical Field

[0001] This invention relates to the field of continuous casting technology for manhole covers, specifically a bidirectional continuous casting machine for ductile iron manhole covers. Background Technology

[0002] Manhole covers are facilities that cover the entrances of inspection wells for underground pipelines, cables, etc. in cities. Their main functions are to prevent falls and facilitate pipeline maintenance and drainage. They can be classified into metal, resin, and other types according to their materials. They are widely used in driveways, sidewalks, and other scenarios. When producing metal manhole covers, molten metal at high temperatures is poured into pre-prepared sand molds or metal molds for casting.

[0003] The existing casting machine operation generally involves moving the molten metal to one side of the mold, rotating the casting tank to pour out the molten metal, and pouring it into multiple molds in sequence to complete the casting of the manhole cover.

[0004] Most existing casting machine processes are unidirectional casting. Although some casting processes use a single casting tank to cast two-way molds in order to save space and increase the efficiency of casting molds, thus achieving continuous casting, the casting tank can work normally when casting one side of the mold. When casting the other side of the mold, such as when casting manhole covers of different models and materials in batches, it is not necessary to change all the molds. It is only necessary to turn the casting tank around to cast the other side of the mold. This continuous casting can greatly improve casting efficiency. However, the existing continuous casting tank adopts the sequential action of "first rising to the position, then rotating and tilting", which has a long operation cycle. The decomposition of steps reduces the production rhythm. In this process, the risk of heat loss and oxidation of molten metal will increase.

[0005] Furthermore, during the tilting casting process, the casting jar on the casting machine needs to be tilted, which causes the pouring nozzle to shift, making it difficult to maintain alignment with the mold inlet. To solve this problem, the initial solution was to install a large casting funnel above the mold. Each casting required passing through the funnel before flowing to the mold, increasing the casting process. Moreover, the solidified funnel would cause contamination during subsequent casting, reducing casting quality and obstructing the casting view from the mold. Later, the rotation position of the casting jar was changed from its own axis of rotation to the position at the pouring nozzle to alleviate this problem. However, after testing, it was found that due to the increased center of gravity, setting the rotation position at the pouring nozzle would significantly reduce the amount of molten metal that the casting jar could hold, requiring frequent interruptions to replenish the molten metal. This not only disrupted the production rhythm and increased operational complexity but also increased heat loss and oxidation risks.

[0006] Based on this, the present invention provides a bidirectional continuous casting machine for spherical cast iron manhole covers to solve the above problems. Summary of the Invention

[0007] In view of the above situation and to overcome the defects of the prior art, the present invention provides a bidirectional continuous casting machine for ductile iron manhole covers. The present invention has a novel structure and ingenious design, and effectively solves the technical problem that the large change in the position of the casting gate during the casting process affects the casting process.

[0008] A bidirectional continuous casting machine for spherical cast iron manhole covers includes a slide rail, a railcar, a frame, and a main shaft. A traveling gear is fixedly connected to the main shaft. Two support seats are fixedly connected to one side of the inner wall of the frame. A main rack and an auxiliary rack are rotatably connected to the two support seats respectively. The main rack and the auxiliary rack mesh with the two sides of the traveling gear individually.

[0009] Preferably, the same push rod is rotatably connected to one side of the main rack and the auxiliary rack, a fixed seat is fixedly connected to one side of the main rack, a rotating rod is rotatably connected to the fixed seat, and a push block is rotatably connected to the other end of the rotating rod.

[0010] Preferably, an adjustment groove is provided on the side of the frame near the main rack, the push block is slidably connected in the adjustment groove, a bracket is fixedly connected to one side of the frame, an electric push rod is fixedly connected to the bracket, and the output end of the electric push rod is fixedly connected to one side of the push block.

[0011] Preferably, the frame is provided with a guide groove, a main shaft is slidably connected in the guide groove, one end of the main shaft is fixedly connected to a chassis, and a tank is provided on the chassis.

[0012] Preferably, a main bearing housing and an auxiliary bearing housing are rotatably connected to the main shaft, and a hydraulic push rod is fixedly connected to the side of the frame away from the chassis, with the output end of the hydraulic push rod fixedly connected to the top of the main bearing housing.

[0013] Preferably, a casting port is provided on one side of the tank body, a drop groove is provided on the casting port, a guide plate is rotatably provided in the drop groove, an auxiliary support shaft is fixedly connected to the guide plate, an auxiliary gear is fixedly connected to one end of the auxiliary support shaft, a main support shaft is fixedly connected to one side of the casting port, a main gear that meshes with the auxiliary gear is rotatably connected to the main support shaft, a connecting rod is fixedly connected to one side of the main gear, and a load-bearing block is fixedly connected to the other end of the connecting rod.

[0014] The present invention has the following technical effects.

[0015] 1. This invention integrates the lifting and tilting casting of the tank into a continuous and coordinated action through a main rack, auxiliary rack, traveling gear, and hydraulic push rod, significantly shortening the process time and effectively reducing heat loss of molten metal due to process interruptions. By switching between the electric push rod, push block, rotating rod, push rod, and main rack and auxiliary rack, the tank can be reversed to continuously cast into the mold on the other side without batch mold replacement or the need to add casting tracks, thus improving casting efficiency.

[0016] 2. This invention, through the use of a guide plate, auxiliary gear, main gear, and load-bearing block, allows the guide plate to rotate synchronously with the tank when it is tilted, greatly reducing the positional change of the casting port. This enables flexible adjustment of the discharge direction of the casting port, ensuring that the molten metal flows accurately into the preset mold cavity. This not only optimizes the casting trajectory and reduces the risk of molten metal splashing or deviation, but also reduces the workload of manual adjustments by the staff, significantly improving the accuracy and ease of operation of the casting process. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a front view schematic diagram of the structure in this invention;

[0019] Figure 2 This is a side view of the structure in this invention;

[0020] Figure 3 This is a schematic diagram of the assembly structure of the casting port, guide plate, auxiliary gear and main gear in this invention;

[0021] Figure 4 This is a schematic diagram of the assembly structure of the railcar, chassis, and frame in this invention;

[0022] Figure 5 This is a schematic diagram of the assembly structure of the auxiliary bearing housing, sliding plate, limiting rod and traveling gear in this invention;

[0023] Figure 6 This is a schematic diagram of the assembly structure of the frame, support base, main rack and auxiliary rack in this invention;

[0024] Figure 7 This is a schematic diagram of the assembly structure of the railcar and chassis in this invention;

[0025] Figure 8 This is the present invention. Figure 7 Enlarged structural diagram of section A in the middle.

[0026] Reference numerals: 1. Slide rail; 2. Railcar; 3. Frame; 4. Guide chute; 5. Main shaft; 6. Chassis; 7. Fixing block; 8. Positioning support; 9. Bayonet groove; 10. Tank body; 15. Casting port; 16. Drop chute; 17. Guide plate; 18. Auxiliary support shaft; 19. Auxiliary gear; 20. Main support shaft; 21. Main gear; 22. Connecting rod; 23. Load-bearing block; 24. Sealing cover; 25. Hydraulic push rod; 26. Main bearing seat; 27. Auxiliary bearing seat; 28. Sliding plate; 29. ​​Limiting rod; 30. Traveling gear; 31. Support seat; 32. Main rack; 33. Auxiliary rack; 34. Push rod; 35. Adjustment groove; 36. Fixing seat; 37. Rotating rod; 38. Pushing block; 39. Bracket; 40. Electric push rod. Detailed Implementation

[0027] The foregoing and other technical contents, features and effects of the present invention are described in conjunction with the appendix below. Figures 1 to 8 The detailed description of the embodiments will make this clear. All references to the following embodiments are made with reference to the accompanying drawings.

[0028] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings.

[0029] This invention relates to a bidirectional continuous casting machine for spherical cast iron manhole covers, comprising a slide rail 1, a railcar 2, a frame 3, and a main shaft 5. A traveling gear 30 is fixedly connected to the main shaft 5 and is located inside the frame 3. Two support seats 31 are fixedly connected to one side of the inner wall of the frame 3. A main rack 32 and an auxiliary rack 33 are rotatably connected to the two support seats 31, and the main rack 32 and the auxiliary rack 33 mesh with the two sides of the traveling gear 30 respectively.

[0030] As one embodiment, the main rack 32 and the auxiliary rack 33 are respectively rotatably connected to the same push rod 34 on one side, the main rack 32 is fixedly connected to a fixed seat 36, a rotating rod 37 is rotatably connected to the fixed seat 36, and a push block 38 is rotatably connected to the other end of the rotating rod 37.

[0031] As an example, an adjustment groove 35 is provided on the side of the frame 3 near the main rack 32, and the push block 38 is slidably connected in the adjustment groove 35. A bracket 39 is fixedly connected to one side of the frame 3, and an electric push rod 40 is fixedly connected to the bracket 39. The output end of the electric push rod 40 is fixedly connected to one side of the push block 38.

[0032] In this embodiment, in the initial state, the traveling gear 30 is engaged with the main rack 32. When the main shaft 5 rises under the drive of the main bearing seat 26 and the auxiliary bearing seat 27, the traveling gear 30 moves upward synchronously along the main rack 32 and rotates under the guidance of the main rack 32's trajectory. This rotation causes the main shaft 5 to rotate within the main bearing seat 26 and the auxiliary bearing seat 27, thereby driving the chassis 6 to rotate. Ultimately, this causes the tank 10 fixed on the chassis 6 to tilt, completing the casting operation on one side. After casting is completed and the chassis 6 is reset, the position of the casting port 15 can be changed by lifting or using a forklift to adjust the tank 10. Subsequently, the electric push rod 40 is controlled to retract, driving... The moving push block 38 slides in the adjusting groove 35, driving the rotating rod 37 connected to it to pull the main rack 32, causing it to disengage from the traveling gear 30. At the same time, through the pull of the push rod 34 connected to one side of the main rack 32 and the auxiliary rack 33, the auxiliary rack 33 moves closer to the traveling gear 30 and engages with it. After the rack switching is completed, when the main shaft 5 rises again, the traveling gear 30 will move along the auxiliary rack 33, causing the tank 10 to tilt to the other side, completing the reverse casting operation. This enables the same tank 10 to complete the continuous casting of alternating sides without reinstallation or mold replacement, significantly improving the flexibility and efficiency of the operation.

[0033] It should be noted that the electric actuator 40 is connected to a power supply and a controller.

[0034] As an example, a guide groove 4 is provided on the frame 3, and a main shaft 5 is slidably connected in the guide groove 4. The two ends of the main shaft 5 pass through both sides of the frame 3, and a chassis 6 is fixedly connected to one end of the main shaft 5. A tank 10 is provided on the chassis 6.

[0035] As an example, the top of the chassis 6 is fixedly connected to two fixing blocks 7, and the bottom of the tank body 10 is fixedly connected to a positioning support 8, with a bayonet groove 9 at the bottom of the positioning support 8.

[0036] As an example, both fixing blocks 7 are engaged with the bayonet grooves 9 at the bottom of the positioning support 8, and the tank body 10 is fixed on the chassis 6 by the positioning support 8.

[0037] As an example, a sealing cap 24 is provided on the top of the tank 10.

[0038] In this embodiment, before use, the tank 10 is filled with casting liquid (molten metal). Workers use external hoisting or a forklift to lift the tank 10, aligning the positioning support 8 at the bottom of the tank 10 with the fixing block 7 on the chassis 6, until the fixing block 7 on the chassis 6 is embedded into the slot 9 on the positioning support 8, thus connecting the chassis 6 and the positioning support 8 as a whole, limiting the position of the tank 10. Conventional fixing methods also include the use of insertion holes and pins, or the use of rotating rails and rotating grooves, such as... Figure 1As shown (not marked), this is existing technology and will not be described in detail here. When it is necessary to cast the mold on the other side, the operator will detach the fixing block 7 and the bayonet groove 9, lift the tank body 10 again, and adjust the casting port 15 to align with the other side, thereby quickly completing the switching of the casting direction and facilitating flexible adjustment of the casting position during continuous casting.

[0039] As an example, a main bearing housing 26 and an auxiliary bearing housing 27 are rotatably connected to the main shaft 5. The main bearing housing 26 is located on the side of the frame 3 away from the chassis 6. A hydraulic push rod 25 is fixedly connected to the side of the frame 3 away from the chassis 6. The output end of the hydraulic push rod 25 is fixedly connected to the top of the main bearing housing 26.

[0040] As an example, the auxiliary bearing housing 27 is located inside the frame 3. A sliding plate 28 is fixedly connected to the top of the auxiliary bearing housing 27, and two limiting rods 29 are fixedly connected to the bottom of the inner wall of the frame 3. The sliding plate 28 is slidably connected to the two limiting rods 29.

[0041] In this embodiment, through the coordinated operation of the main bearing seat 26 and the auxiliary bearing seat 27, the chassis 6 can still rotate freely while rising during the continuous casting process. The hydraulic push rod 25 retracts, driving the main bearing seat 26 to rise upwards, thereby causing the chassis 6 to rise smoothly. At the same time, the main shaft 5 synchronously drives the auxiliary bearing seat 27 to rise. The sliding plate 28 on the auxiliary bearing seat 27 slides along the two limit rods 29, thereby effectively limiting and stabilizing the rising trajectory of the auxiliary bearing seat 27. This ensures that the chassis 6 maintains structural stability during vertical lifting and does not affect its rotation around the axis. Thus, height adjustment and direction adjustment are carried out simultaneously in the continuous casting operation, improving the continuity of operation.

[0042] It should be noted that the hydraulic push rod 25 is connected to a power supply, a controller, and an external drive device to drive the hydraulic push rod 25. The hydraulic push rod 25 is existing technology, so it has not been described in detail.

[0043] As an example, a casting port 15 is provided on one side of the tank body 10. A drop groove 16 is provided on the casting port 15. The drop groove 16 is rectangular and its width is equal to the width of the bottom of the casting port 15. A guide plate 17 is provided in the drop groove 16. An auxiliary support shaft 18 is fixedly connected to the guide plate 17. The guide plate 17 is rotatably connected to the drop groove 16 through the auxiliary support shaft 18. Both ends of the auxiliary support shaft 18 pass through both sides of the casting port 15. An auxiliary gear 19 is fixedly connected to one end of the auxiliary support shaft 18. The auxiliary gear 19 is located outside the casting port 15. A main support shaft 20 is fixedly connected to one side of the casting port 15. A main gear 21 is rotatably connected to the main support shaft 20. The main gear 21 meshes with the auxiliary gear 19. A connecting rod 22 is fixedly connected to the side of the main gear 21 away from the casting port 15. A load-bearing block 23 is fixedly connected to the other end of the connecting rod 22.

[0044] In this embodiment, when the tank 10 is in its initial state, the load-bearing block 23 is vertically downward and tends to remain vertically downward throughout its movement. As the tank 10 rises and gradually tilts to pour molten metal, the tilting of the tank 10 causes the load-bearing block 23 to rotate. Under the influence of gravity, the load-bearing block 23 continues to rotate downward until it returns to a vertical state. During this process, the rotation of the load-bearing block 23 is transmitted to the main gear 21 through the connecting rod 22, driving it to rotate on the main support shaft 20. The main gear 21 further drives the auxiliary gear 19, which meshes with it, to rotate. When the auxiliary gear 19 rotates within the drop trough 16 via the auxiliary support shaft 18, it drives the guide plate 17 to rotate downwards synchronously. This allows the guide plate 17 to adjust the discharge direction of the casting port 15 in real time during the casting process, ensuring that the casting point changes synchronously with the tilt of the tank 10, thus achieving stable mold casting. After casting is completed, when the tank 10 rotates in the reverse direction, the load-bearing block 23, under the influence of gravity, drives the main gear 21 to rotate in the reverse direction. Through the meshing of the main gear 21, the auxiliary gear 19 rotates in the reverse direction, causing the guide plate 17 to rotate in the reverse direction and reset within the drop trough 16.

[0045] It should be noted that the position of the casting gate 15 may still change. Since the opening of the mold itself has a size range, after pre-setting the size, meshing and precision of the load-bearing block 23, connecting rod 22, main gear 21, auxiliary gear 19 and guide plate 17, the position change of the casting gate 15 can be greatly reduced, so that the casting gate 15 changes within a very small range within the mold opening range, ensuring that the casting liquid can be smoothly poured into the mold.

[0046] Working principle of this invention:

[0047] In use, the molten metal for casting is first poured into the tank 10, then the tank 10 is lifted or forked and placed on the chassis 6. The positioning support 8 at the bottom of the tank 10 is aligned with the fixing block 7 on the chassis 6, thereby limiting the tank 10 on the chassis 6.

[0048] During casting, the hydraulic push rod 25 retracts, causing the main bearing seat 26 to rise, which in turn drives the main shaft 5 to move smoothly upward along the guide groove 4. The auxiliary bearing seat 27 is guided synchronously along the limit rod 29 by the sliding plate 28 to ensure the stability of the vertical rise of the main shaft 5. At this time, the traveling gear 30 meshes with the main rack 32 and rotates along the main rack 32 during the rise, thereby driving the main shaft 5 and the chassis 6 to rotate, so that the tank 10 can be tilted synchronously during the lifting process, thus completing the casting.

[0049] When the casting position needs to be changed, the electric push rod 40 retracts, and the push rod 34 pulls the main rack 32 out of the travel gear 30 and makes the auxiliary rack 33 mesh with it. Then the main shaft 5 rises again, the travel gear 30 moves along the auxiliary rack 33, and drives the tank 10 to tilt in the opposite direction, so as to realize continuous casting of the mold on the other side.

[0050] During the tilting process of the tank body 10, the load-bearing block 23 rotates adaptively under the action of gravity, which drives the main gear 21 to rotate and drives the auxiliary gear 19 meshing with it to rotate. The auxiliary gear 19 drives the guide plate 17 to deflect in the drop groove 16 of the casting port 15 through the auxiliary support shaft 18, thereby dynamically adjusting the direction of the molten metal flow, so that it always keeps aligned with the casting port 15 of the mold, significantly improving the accuracy and adaptability of casting.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bidirectional continuous casting machine for ductile iron manhole covers, comprising a slide rail (1), a railcar (2), a frame (3), and a main shaft (5), characterized in that, A traveling gear (30) is fixedly connected to the main shaft (5). Two support seats (31) are fixedly connected to one side of the inner wall of the frame (3). A main rack (32) and an auxiliary rack (33) are rotatably connected to the two support seats (31). The main rack (32) and the auxiliary rack (33) mesh with the two sides of the traveling gear (30) respectively.

2. The bidirectional continuous casting machine for spherical cast iron manhole covers according to claim 1, characterized in that, The main rack (32) and the auxiliary rack (33) are rotatably connected to the same push rod (34) on one side respectively. A fixed seat (36) is fixedly connected to one side of the main rack (32). A rotating rod (37) is rotatably connected to the fixed seat (36). A push block (38) is rotatably connected to the other end of the rotating rod (37).

3. A bidirectional continuous casting machine for spherical cast iron manhole covers according to claim 2, characterized in that, The frame (3) has an adjustment groove (35) on the side near the main rack (32). The push block (38) is slidably connected in the adjustment groove (35). A bracket (39) is fixedly connected to one side of the frame (3). An electric push rod (40) is fixedly connected to the bracket (39). The output end of the electric push rod (40) is fixedly connected to one side of the push block (38).

4. A bidirectional continuous casting machine for spherical cast iron manhole covers according to claim 1, characterized in that, The frame (3) is provided with a guide groove (4), and a main shaft (5) is slidably connected in the guide groove (4). One end of the main shaft (5) is fixedly connected to a chassis (6), and a tank (10) is provided on the chassis (6).

5. A bidirectional continuous casting machine for spherical cast iron manhole covers according to claim 4, characterized in that, The main shaft (5) is rotatably connected to a main bearing housing (26) and an auxiliary bearing housing (27). A hydraulic push rod (25) is fixedly connected to the side of the frame (3) away from the chassis (6). The output end of the hydraulic push rod (25) is fixedly connected to the top of the main bearing housing (26).

6. A bidirectional continuous casting machine for spherical cast iron manhole covers according to claim 4, characterized in that, A casting port (15) is provided on one side of the tank body (10). A drop groove (16) is provided on the casting port (15). A guide plate (17) rotates in the drop groove (16). An auxiliary support shaft (18) is fixedly connected to the guide plate (17). An auxiliary gear (19) is fixedly connected to one end of the auxiliary support shaft (18). A main support shaft (20) is fixedly connected to one side of the casting port (15). A main gear (21) meshing with the auxiliary gear (19) is rotatably connected to the main support shaft (20). A connecting rod (22) is fixedly connected to one side of the main gear (21). A load-bearing block (23) is fixedly connected to the other end of the connecting rod (22).

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