Lifting device for riser

Abstract

The application provides a lifting device for liquid lifting pipes, which comprises an outer frame and a liquid lifting pipe placing rack. The outer wall of the liquid lifting pipe placing rack is provided with a plurality of placing grooves. The inner wall of each placing groove is slidably connected with a liquid lifting pipe sleeve. The top of the outer frame is fixedly connected with a top frame. The top of the top frame is fixedly connected with a mounting plate. The outer wall of the mounting plate is fixedly provided with a pressure reducing valve, an air flow rate valve and a reversing valve. The application is provided with an outer frame, a liquid lifting pipe placing rack, universal wheels, a top frame, a mounting plate, a pressure reducing valve, an air flow rate valve, a reversing valve, a gas cylinder, an assembling plate, guide columns, a circular sleeve, a gasket, a locking sleeve, a rotating disc, a U-shaped guide plate, a lifting ring and a lifting fixing frame. The application is convenient for synchronously replacing a plurality of liquid lifting pipe sleeves and is more convenient to operate. Only one person is needed to perform continuous operation test.

Description

Technical Field

[0001] This invention relates to the field of riser pipe replacement equipment technology, and more particularly to a riser pipe lifting device. Background Technology

[0002] A holding furnace consists of a furnace body, a molten pool, a sealing cover, and a riser assembly. It is an instrument designed to overcome the drawback of rapid cooling of the hot sintered ore surface after it has been ignited and burned at high temperatures and then suddenly exposed to the atmosphere. This rapid cooling results in a significant increase in glassiness and a decrease in strength in the surface sinter. It is an important component of low-pressure casting furnaces. The riser assembly, with its upper part connected to the mold and its lower part immersed in the molten metal, serves as the pathway for the molten metal to flow into the mold cavity. Besides ensuring the mold is filled with molten metal, it should also ensure that the casting receives adequate feeding.

[0003] In existing technology, the replacement of riser pipes is carried out one by one and cannot be done simultaneously, and it requires the use of a crane. Furthermore, because the riser pipes need to be slowly lowered into the holding furnace when they are repositioned, and the crane cannot adjust the lifting and lowering speed, it can only perform intermittent operations. If the number of pipes to be replaced reaches 7, it takes a long time and delays production. Therefore, we propose a riser pipe lifting device to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and propose a lifting device for the riser pipe.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A lift pipe hoisting device includes an outer frame and a lift pipe placement rack. The outer wall of the lift pipe placement rack has multiple placement slots, and a lift pipe assembly is slidably connected to the inner wall of each slot. A top frame is fixedly connected to the top of the outer frame, and a mounting plate is fixedly connected to the top of the top frame. A pressure reducing valve, an air flow valve, and a reversing valve are fixedly installed on the outer wall of the mounting plate. Pipelines are fixedly installed on the outer walls of the pressure reducing valve, air flow valve, and reversing valve, and these valves are interconnected via pipelines. A cylinder is fixedly connected to the outer wall of the mounting plate, and one of the pipelines... The cylinder output end is fixedly connected to the outer wall of the cylinder. An assembly plate is fixedly installed at the bottom of the cylinder output end. The outer wall of the assembly plate is provided with a guide mechanism. Two U-shaped guide plates are fixedly connected to the inner walls of the outer frame and the top frame. A lifting and fixing frame is fixedly connected to the outer wall of the assembly plate. Multiple through holes are opened on the outer wall of the lifting and fixing frame. A fixing rod is fixedly connected to the inner wall of the through holes. A crossbar is fixedly sleeved on the outer wall of the fixing rod. Two mounting holes are opened on the outer wall of the crossbar. Fastening bolts are threadedly connected to the inner walls of the two mounting holes. A heat shield is slidably sleeved on the outer wall of the fixing rod. A connecting mechanism that cooperates with the liquid riser placement frame is provided on the outer wall of the fixing rod.

[0007] Preferably, the guiding mechanism includes four guide posts. The outer wall of the mounting plate is fixedly connected to the bottom of the four guide posts. A circular sleeve is slidably fitted on the outer wall of each of the four guide posts. A gasket is fixedly connected to the bottom of the circular sleeve. The outer wall of the gasket is fixedly connected to the outer wall of the mounting plate by bolts. Locking sleeves are fixedly connected to the outer walls of two of the circular sleeves. The inner walls of the two locking sleeves are slidably connected to the outer walls of the two guide posts respectively. A threaded hole is opened on the outer wall of the locking sleeve. A locking bolt is threadedly connected to the inner wall of the threaded hole. A rotating disk is fixedly connected to one end of the locking bolt. The rotating disk rotates to cause the locking bolt to drive the extrusion plate to fix the position of the guide post.

[0008] Preferably, the connecting mechanism includes a rectangular plate with an assembly hole on its outer wall. The inner wall of the assembly hole is fixedly connected to the outer wall of the fixing rod. The outer wall of the rectangular plate has two T-slots, and T-blocks are slidably connected to the inner walls of the two T-slots. A connecting rod is fixedly connected to the outer wall of each T-block, and an arc-shaped clamping plate is fixedly connected to the bottom of the connecting rod. Rotating two long bolts causes the two T-blocks to slide within the T-slots, allowing the two T-blocks to move relative to each other. This relative movement of the T-blocks causes the connecting rod and the arc-shaped clamping plate to move relative to each other, thus assisting in clamping the riser tube assembly.

[0009] Preferably, the bottom of the riser tube placement frame is fixedly connected to multiple casters, and the bottom of the outer frame is fixedly connected to four support legs. The casters facilitate the movement of the riser placement frame, and the support legs provide support for the outer frame.

[0010] Preferably, a locking plate is rotatably connected to the other end of the locking bolt. The outer wall of the locking plate is pressed against the outer wall of the guide post, and the guide post is limited by the locking bolt.

[0011] Preferably, the outer wall of the top frame has four circular holes, and the inner walls of the four circular holes are slidably connected to the outer walls of the four guide posts.

[0012] Preferably, the outer wall of the mounting plate is provided with a sliding hole, and the inner wall of the sliding hole is slidably connected to the outer wall of the cylinder output end. The mounting plate and the lifting and fixing frame are raised and lowered by the cylinder.

[0013] Preferably, the outer wall of the top frame is fixedly connected to two lifting rings, which facilitate the movement of the outer frame by the crane.

[0014] Preferably, the outer wall of the lifting frame is fixedly connected to two guide blocks, and the outer walls of the two guide blocks are slidably connected to the inner walls of two U-shaped guide plates, thereby assisting the lifting frame in raising and lowering.

[0015] Preferably, the outer wall of the rectangular plate has two elongated holes, and the inner walls of the two elongated holes are threaded with long bolts, one end of which is rotatably connected to the outer wall of the T-shaped block.

[0016] Compared with the prior art, the advantages of the present invention are as follows:

[0017] This solution facilitates the simultaneous replacement of multiple riser tube sets by setting up an outer frame, riser tube placement rack, casters, top frame, mounting plate, pressure reducing valve, air flow valve, reversing valve, cylinder, assembly plate, guide column, round sleeve, gasket, locking sleeve, rotating disc, U-shaped guide plate, lifting ring, and lifting fixing frame. This makes operation more convenient, requiring only one person for continuous operation and testing. The solution also uses fixing rods, crossbars, fastening bolts, heat shields, rectangular plates, T-blocks, connecting rods, and arc-shaped clamps to fix the position of the riser tube sets, facilitating movement and preventing damage from impacts. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the lifting device for the riser pipe proposed in this invention;

[0019] Figure 2 This is a cross-sectional structural diagram of the lifting device for the riser pipe proposed in this invention;

[0020] Figure 3 The lifting device for the riser pipe proposed in this invention Figure 1 A magnified structural diagram of part A in the diagram;

[0021] Figure 4 The lifting device for the riser pipe proposed in this invention Figure 2 A magnified structural diagram of part B in the diagram;

[0022] Figure 5 This is a schematic diagram of the structure of the guide column, circular sleeve, gasket, locking sleeve and rotating disk of the lifting device for the riser pipe proposed in this invention;

[0023] Figure 6 This is a partial three-dimensional structural diagram of the lifting device for the liquid riser pipe proposed in this invention.

[0024] In the diagram: 1. Outer frame; 2. Lift pipe placement rack; 3. Casters; 4. Lift pipe assembly; 5. Top frame; 6. Mounting plate; 7. Pressure reducing valve; 8. Air flow valve; 9. Directional valve; 10. Cylinder; 11. Assembly plate; 12. Guide post; 13. Round sleeve; 14. Gasket; 15. Locking sleeve; 16. Rotating disc; 17. U-shaped guide plate; 18. Lifting ring; 19. Lifting fixing frame; 20. Fixing rod; 21. Crossbar; 22. Fastening bolt; 23. Heat shield; 24. Rectangular plate; 25. T-block; 26. Connecting rod; 27. Arc-shaped clamp. Detailed Implementation

[0025] Depend on Figures 1-6 As shown, the lifting device for the riser pipe includes an outer frame 1 and a riser pipe placement rack 2. The bottom of the riser pipe placement rack 2 is fixedly connected to multiple casters 3, and the bottom of the outer frame 1 is fixedly connected to four support legs. The casters 3 facilitate the movement of the riser pipe placement rack 2, and the support legs provide support for the outer frame. The outer wall of the riser pipe placement rack 2 is provided with multiple placement slots, and the inner wall of the placement slots is slidably connected to a riser pipe assembly 4. The riser pipe placement rack 2 is used to support the riser pipe assembly 4, which facilitates the replacement of the riser pipe assembly 4 on the heat preservation furnace. The top of the outer frame 1 is fixedly connected to a top frame 5, and the top of the top frame 5 is fixedly connected to a mounting plate 6.

[0026] A pressure reducing valve 7, an air flow valve 8, and a directional valve 9 are all fixedly installed on the outer wall of the mounting plate 6. Pipelines are fixedly installed on the outer walls of the pressure reducing valve 7, the air flow valve 8, and the directional valve 9. The pressure reducing valve 7, the air flow valve 8, and the directional valve 9 are interconnected through pipelines. By adjusting the pressure reducing valve 7 and the air flow valve 8, and by adjusting the directional valve 9, the output end of the cylinder 10 can drive the assembly plate 11 and the lifting frame 19 to rise and fall, and the rising and falling speed can be controlled.

[0027] A cylinder 10 is fixedly connected to the outer wall of the mounting plate 6. One end of the pipeline is fixedly connected to the outer wall of the cylinder 10. A sliding hole is opened on the outer wall of the mounting plate 6. The inner wall of the sliding hole is slidably connected to the outer wall of the output end of the cylinder 10. An assembly plate 11 is fixedly installed at the bottom of the output end of the cylinder 10. A guide mechanism is provided on the outer wall of the assembly plate 11. Two U-shaped guide plates 17 are fixedly connected to the inner walls of the outer frame 1 and the top frame 5.

[0028] Two lifting rings 18 are fixedly connected to the outer wall of the top frame 5, and a lifting frame 19 is fixedly connected to the outer wall of the assembly plate 11. Two guide blocks are fixedly connected to the outer wall of the lifting frame 19. The outer walls of the two guide blocks are slidably connected to the inner walls of the two U-shaped guide plates 17 respectively. When the lifting frame 19 is raised or lowered, it is moved by the guide blocks and the U-shaped guide plates 17. Multiple through holes are opened on the outer wall of the lifting frame 19, and a fixing rod 20 is fixedly connected to the inner wall of the through holes.

[0029] A crossbar 21 is fixedly sleeved on the outer wall of the fixing rod 20. Two mounting holes are opened on the outer wall of the crossbar 21. Fastening bolts 22 are threadedly connected to the inner walls of the two mounting holes. By rotating the fastening bolts 22, one end of the bolts 22 is positioned inside the riser tube assembly 4. A reserved hole is opened on the outer wall of the riser tube assembly 4. The reserved hole cooperates with the fastening bolts 22. In the absence of a reserved hole, the position of the riser tube assembly 4 can be fixed by the connecting mechanism. A heat baffle plate 23 is slidably sleeved on the outer wall of the fixing rod 20. A connecting mechanism that cooperates with the riser tube placement frame 2 is provided on the outer wall of the fixing rod 20.

[0030] The guiding mechanism includes four guide posts 12. The outer wall of the top frame 5 has four circular holes. The inner walls of the four circular holes are slidably connected to the outer walls of the four guide posts 12. The outer wall of the mounting plate 11 is fixedly connected to the bottom of the four guide posts 12. The four guide posts 12 assist the lifting and fixing frame 19 in moving. The outer walls of the four guide posts 12 are all slidably fitted with circular sleeves 13. The bottom of the circular sleeves 13 is fixedly connected with a gasket 14. The outer wall of the gasket 14 is fixedly connected to the outer wall of the mounting plate 6 by bolts.

[0031] The outer walls of the two circular sleeves 13 are fixedly connected to locking sleeves 15. The inner walls of the two locking sleeves 15 are slidably connected to the outer walls of the two guide posts 12. The outer walls of the locking sleeves 15 are provided with threaded holes. The inner walls of the threaded holes are threaded with locking bolts. One end of the locking bolt is fixedly connected to a rotating disk 16, and the other end of the locking bolt is rotatably connected to a locking plate. The outer wall of the locking plate is pressed against the outer wall of the guide post 12. The rotating disk 16 rotates to move the locking bolt and the pressing plate, thereby limiting the guide post 12.

[0032] The connecting mechanism includes a rectangular plate 24. The outer wall of the rectangular plate 24 has an assembly hole. The inner wall of the assembly hole is fixedly connected to the outer wall of the fixing rod 20. The outer wall of the rectangular plate 24 has two T-slots. The inner walls of the two T-slots are slidably connected to T-blocks 25. The outer walls of the T-blocks 25 are fixedly connected to a connecting rod 26. The bottom of the connecting rod 26 is fixedly connected to an arc-shaped clamping plate 27. When the arc-shaped clamping plate 27 moves relative to the T-blocks 25, it assists in clamping the lifting tube assembly 4. The outer wall of the rectangular plate 24 has two elongated holes. The inner walls of the two elongated holes are threaded with long bolts. One end of the long bolts is rotatably connected to the outer wall of the T-blocks 25. Rotating the two long bolts causes the two T-blocks 25 to slide in the T-slots.

[0033] Working principle: In use, first, remove all the fixed riser pipe sets 4 on the heat preservation furnace. Then, hoist the outer frame 1 to a suitable position on the furnace cover plate using the lifting rings 18 on the top frame 6. Align the fastening bolts 22 with the screw holes on the riser pipe sets 4, and rotate the fastening bolts 22 so that one end is inside the riser pipe set 4. The heat shield 23 shields the temperature inside the riser pipe set 4. Rotating the two long bolts causes the two T-blocks 25 to slide in the T-slots, allowing the two T-blocks 25 to slide. The relative movement of the T-block 25 causes the connecting rod 26 and the arc-shaped clamp 27 to move relative to each other, thus enabling the arc-shaped clamp 27 to move relative to each other. The arc-shaped clamp 27 then assists in clamping the riser pipe assembly 4. After multiple riser pipe assemblies 4 are installed and fixed, the rotating disk 16 rotates, causing the locking bolt to move the extrusion plate outwards, releasing the position fixation of the guide post 12. The pressure reducing valve 7 and air flow valve 8 are adjusted, and the reversing valve 9 is also adjusted, causing the output end of the cylinder 10 to drive the assembly plate 11 and... The lifting frame 19 enters the rising state. After reaching the top, the rotating disk 16 rotates to make the locking bolt drive the extrusion plate to fix the position of the guide column 12. The compressed air is disconnected, the gantry crane is connected, and the lifter pipe placement frame 2 is moved and placed in the placement slot according to the corresponding position. When the lifter pipe set 4 is placed, the prepared lifter pipe set 4 is first placed on the lifter pipe placement frame 2 according to the fixed position. Then, the outer frame 1 and the top frame 5 are put on the lifter pipe placement frame 2 and fixed to the lifter pipe set 4 through the connecting mechanism. The gantry crane is connected, and the outer frame 1 is placed on the appropriate position on the furnace cover plate and the compressed air is connected. The rotating disk 16 rotates to make the locking bolt drive the extrusion plate to move outward, releasing the position fixation of the guide column 12. The pressure reducing valve 7 and the air flow valve 8 are adjusted, and the reversing valve 9 is adjusted so that the output end of the cylinder 10 drives the assembly plate 11 and the lifting frame 19 to enter the slow descent state. After reaching the bottom, the compressed air is disconnected, and the position fixation of the lifter pipe set 4 is released through the connecting mechanism.

[0034] The above description is only a preferred embodiment of this practice, but the scope of protection of this embodiment is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope of the technology disclosed in this embodiment, based on the technical solution and inventive concept of this embodiment, should be covered within the scope of protection of this embodiment.

Claims

1. A lifting device for a riser pipe, comprising an outer frame (1) and a riser pipe placement rack (2), characterized in that, The outer wall of the riser tube placement rack (2) is provided with multiple placement slots, and the inner wall of the placement slot is slidably connected to the riser tube set (4). The top of the outer frame (1) is fixedly connected to the top frame (5), and the top of the top frame (5) is fixedly connected to the top plate (6). The outer wall of the mounting plate (6) is fixedly installed with a pressure reducing valve (7), an air flow valve (8), and a reversing valve (9). The outer walls of the pressure reducing valve (7), the air flow valve (8), and the reversing valve (9) are all fixedly installed with pipelines. The pressure reducing valve (7), the air flow valve (8), and the reversing valve (9) are interconnected through pipelines. The outer wall of the mounting plate (6) is fixedly connected to a cylinder (10), and one end of the pipeline is fixedly interconnected with the outer wall of the cylinder (10). A mounting plate (11) is fixedly installed at the bottom of the output end of the cylinder (10). The outer wall of the mounting plate (11) is provided with a guide mechanism. The inner walls of the outer frame (1) and the top frame (5) are both fixedly connected with two U-shaped guide plates (17). The outer wall of the mounting plate (11) is fixedly connected with a lifting fixing frame (19). The outer wall of the lifting fixing frame (19) is provided with multiple through holes. The inner wall of the through holes is fixedly connected with a fixing rod (20). The outer wall of the fixing rod (20) is fixedly fitted with a crossbar (21). The outer wall of the crossbar (21) is provided with two mounting holes. The inner walls of the two mounting holes are threaded with fastening bolts (22). The outer wall of the fixing rod (20) is slidably fitted with a heat shield plate (23). The outer wall of the fixing rod (20) is provided with a connection mechanism that cooperates with the liquid riser placement frame (2). The connecting mechanism includes a rectangular plate (24), the outer wall of which is provided with an assembly hole, the inner wall of which is fixedly connected to the outer wall of the fixing rod (20), the outer wall of which is provided with two T-slots, the inner walls of which are slidably connected with T-blocks (25), the outer wall of which is fixedly connected with a connecting rod (26), and the bottom of which is fixedly connected with an arc-shaped clamping plate (27). The outer wall of the top frame (5) is fixedly connected to two lifting rings (18).

2. The lifting device for the riser pipe according to claim 1, characterized in that, The guiding mechanism includes four guide posts (12). The outer wall of the assembly plate (11) is fixedly connected to the bottom of the four guide posts (12). The outer walls of the four guide posts (12) are slidably fitted with round sleeves (13). The bottom of the round sleeves (13) is fixedly connected with a gasket (14). The outer wall of the gasket (14) is fixedly connected to the outer wall of the mounting plate (6) by bolts. The outer walls of two round sleeves (13) are fixedly connected with locking sleeves (15). The inner walls of the two locking sleeves (15) are slidably connected to the outer walls of the two guide posts (12). The outer wall of the locking sleeves (15) is provided with threaded holes. The inner wall of the threaded holes is threaded with locking bolts. One end of the locking bolt is fixedly connected to a rotating disk (16).

3. The lifting device for the riser pipe according to claim 1, characterized in that, The bottom of the riser tube placement frame (2) is fixedly connected with multiple casters (3), and the bottom of the outer frame (1) is fixedly connected with four support legs.

4. The lifting device for the riser pipe according to claim 2, characterized in that, The other end of the locking bolt is rotatably connected to a locking plate, and the outer wall of the locking plate is pressed against the outer wall of the guide post (12).

5. The lifting device for the riser pipe according to claim 2, characterized in that, The outer wall of the top frame (5) has four circular holes, and the inner walls of the four circular holes are slidably connected to the outer walls of the four guide posts (12).

6. The lifting device for the riser pipe according to claim 1, characterized in that, The outer wall of the mounting plate (6) is provided with a sliding hole, and the inner wall of the sliding hole is slidably connected to the outer wall of the output end of the cylinder (10).

7. The lifting device for the riser pipe according to claim 1, characterized in that, The outer wall of the lifting frame (19) is fixedly connected to two guide blocks, and the outer walls of the two guide blocks are slidably connected to the inner walls of the two U-shaped guide plates (17).

8. The lifting device for the riser pipe according to claim 1, characterized in that, The outer wall of the rectangular plate (24) has two elongated holes, and the inner walls of the two elongated holes are threaded with long bolts. One end of the long bolts is rotatably connected to the outer wall of the T-block (25).

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