Ladle weighing sensor lifter

Abstract

This invention relates to a lifting device for a molten iron scale weighing sensor. The lifting device includes two nuts, six lifting bolts, eight cylindrical strong magnets, two wedge-shaped clamping blocks or two stepped clamping blocks, six auxiliary bolts, two clamping bolts, and two guide cylindrical pins. The eight cylindrical strong magnets are pressed into the countersunk holes on the upper surface of the wedge-shaped clamping blocks or stepped clamping blocks. One end of each guide cylindrical pin is inserted into two positioning holes on the vertical plane of any one of the two wedge-shaped clamping blocks or stepped clamping blocks. The two clamping bolts are inserted from either side of the combined clamping blocks into the elongated inner holes on the upper surface of the clamping blocks, and out through the elongated inner holes of the other clamping block, and are tightened with nuts. The lifting bolts are screwed into the six internal threaded through holes on the upper surface of the combined wedge-shaped clamping blocks or stepped clamping blocks. The auxiliary bolts are screwed into the threads on the outer surface of the combined wedge-shaped clamping blocks or stepped clamping blocks.

Description

Technical Field

[0001] This invention relates to a lifting device, specifically to a method for quickly removing the weighing sensor head of a molten iron scale online, used to remove the sensor head in a confined space, belonging to the field of structural component technology. Background Technology

[0002] Our company belongs to the metal smelting industry and has a series of products including coking, ironmaking, steelmaking, hot rolling, cold rolling and power generation. This requires a large amount of raw materials to be imported and exported. The raw material ratio required by the production process is currently completed by various weighing instruments, such as dynamic and static train scales, belt scales for transportation, and hopper scales for unloading. These are all metering equipment used in the production process.

[0003] The molten iron scale is mounted on a transport locomotive. Due to production and safety requirements, the entire scale is placed in a 15-meter-deep pit. Molten iron is poured into the ladle from above, and the splashing slag or overflowing molten iron can damage the load cells. Furthermore, the 250-ton ladle crushes the upper and lower pressure heads, necessitating the replacement of the load cells. Replacing the load cells themselves is not difficult; the most challenging part is removing the 16 upper and lower pressure heads from the eight load cells. Deformation or cracking of the embedded pressure heads, coupled with limited working space, makes even using pry bars and hammers difficult, slowing down the replacement process and exposing potential safety hazards. Therefore, a new solution is urgently needed to address these technical problems. Summary of the Invention

[0004] This invention addresses the problems existing in the prior art by providing a method for quickly removing the weighing sensor head of a molten iron scale online. This technical solution is easy to assemble, safe and reliable, reduces labor intensity, avoids safety hazards, has low manufacturing cost, and is reusable.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: a lifting device for a molten iron scale weighing sensor, characterized in that the lifting device includes two nuts, six lifting bolts, eight cylindrical strong magnets, two wedge-shaped clamping blocks or two stepped clamping blocks, six auxiliary bolts, two clamping bolts, and two guide cylindrical pins; the eight cylindrical strong magnets are pressed into the countersunk holes on the upper surface of the wedge-shaped clamping blocks or stepped clamping blocks.

[0006] One end of the guide cylindrical pin is inserted into two positioning holes on the vertical plane of either of the two wedge-shaped clamping blocks or the two stepped clamping blocks; two clamping bolts are inserted from either side of the combined clamping block into the elongated inner hole on the upper plane of the clamping block, and out through the elongated inner hole of the other clamping block, and tightened with nuts; the lifting bolt is screwed into the six internal threaded through holes on the upper plane of the combined wedge-shaped clamping block or the stepped clamping block; the auxiliary bolt is screwed into the threaded outer plane of the combined wedge-shaped clamping block or the stepped clamping block.

[0007] As an improvement to the present invention, the installation method of the lifting device is as follows:

[0008] Step 1: Press the eight cylindrical strong magnets into the countersunk holes on the upper surface of the wedge-shaped clamping block or the stepped clamping block;

[0009] Step 2: Insert one end of each of the two guide cylindrical pins into the two positioning holes on the vertical plane of either of the two wedge-shaped clamping blocks or the two stepped clamping blocks;

[0010] Step 3: Align the two positioning holes on the vertical plane of the other wedge-shaped clamping block or stepped clamping block with the guide cylindrical pin and insert it to merge the two clamping blocks together;

[0011] Step 4: Insert the two clamping bolts from either side of the combined clamping block into the elongated inner hole on the upper surface of the clamping block, and out through the elongated inner hole of the other clamping block, and tighten them with nuts;

[0012] Step 5: Screw the six lifting bolts into the six internal threaded holes on the upper surface of the combined wedge-shaped clamping block or stepped clamping block;

[0013] Step 6: Screw the six auxiliary bolts into the threads on the outer plane of the combined wedge-shaped clamping block or stepped clamping block;

[0014] Step 7: The molten iron scale weighing sensor pressure head lifter is assembled according to the above method.

[0015] As an improvement of the present invention, the lifting device is used to quickly remove the weighing sensor pressure head of the molten iron scale online.

[0016] The method is as follows:

[0017] Step 1: If the distance between the weighing sensor step and the base plate plane of the molten iron scale is large, select to use a stepped jack. If the gap between the weighing sensor step and the base plate plane is small or there is no gap, select to use a wedge jack, or use them alternately.

[0018] Step 2: Observe the up and down direction of the weighing sensor head of the molten iron scale to see if a cylindrical strong magnet is used. If the lower head is facing upward, the cylindrical strong magnet is not needed for adsorption and can be removed. If the upper head is facing upward, a cylindrical strong magnet should be used to prevent the clamping block from falling off during installation and to provide auxiliary adsorption.

[0019] Step 3: If the pressure head is removed and the gap between the pressure head step and the base plate plane is small or non-existent, first select a wedge jack and insert the two guide cylindrical pins into the positioning holes of any wedge clamping block on the vertical plane.

[0020] Step 4: Place the two wedge-shaped clamping blocks on the base plate and clamp them together from opposite directions, ensuring that the guide cylindrical pin enters the positioning hole of the other wedge-shaped clamping block, and determine the engagement position between the step of the two wedge-shaped clamping blocks and the base plate.

[0021] Step 5: Depending on the available space, insert two clamping bolts into the through holes above the two clamping blocks, tighten the clamping bolts with nuts, and fix the two wedge-shaped clamping blocks in place.

[0022] Step 6: Depending on the space available, select any auxiliary bolts and tighten them into the threaded holes around the sides of the two clamping blocks to serve as force-applying handrails.

[0023] Step 7: Tighten the two clamping bolts alternately. The wedge-shaped cutting edge of the wedge clamping block is pressed into the joint gap between the step of the lower pressure head and the plane of the base plate. The lower pressure head is slowly lifted until the two clamping blocks are completely joined together, which proves that a large gap has been created between the step of the lower pressure head and the plane of the base plate. Then loosen the two clamping bolts and remove the wedge jack.

[0024] Step 8: Insert two guide cylindrical pins into the positioning holes on the vertical plane of any clamping block of the stepped jack. Place the two clamping blocks on the outer circle of the lower pressure head step and slowly move them to connect, ensuring that the two guide cylindrical pins enter the corresponding clamping block positioning blocks and that the force-bearing surface of the step enters the gap between the lower pressure head step and the bottom plate plane. Then insert two clamping bolts and tighten the nuts, and the two clamping blocks clamp the outer circle of the lower pressure head step.

[0025] Step 9: Tighten the auxiliary bolts for easy operation, and then screw all the lifting bolts into the threaded holes of the two clamping blocks. At this point, the stepped lifting device is installed and positioned online.

[0026] Step 10: Use a tool to rotate the lifting bolt evenly and symmetrically. At this time, the lifting device will slowly rise as a whole, and the gap between it and the base plate will become larger and larger, which proves that the pressure head is slowly rising from the inner hole of the base plate until the pressure head and the stepped lifting device are in a free state and disengaged.

[0027] Step 11: Grasp the auxiliary bolts with your hands and remove the pressure head and jack as a whole from the confined space;

[0028] Step 12: Once the weighing sensor head of the molten iron scale is removed, the stepped jacking device is disassembled, and the other heads are removed using the same method.

[0029] As an improvement of the present invention, the above method is used to remove the stepped shaft and the pin from the mounting hole.

[0030] As an improvement of the present invention, in the above method, when the stepped jack and the wedge jack are used with horizontal stepped shafts and pins, there is no need to install cylindrical strong magnets. They are only installed when disassembling vertical and upper shaft parts.

[0031] Compared with existing technologies, this invention has the following advantages: 1) This technical solution belongs to a threaded clamping and lifting mechanism, which is sturdy and reliable. It is used in confined areas with limited space and many obstacles, where common tools cannot be used, such as a narrow space with many obstacles around the pressure head of the weighing sensor of a molten iron scale; 2) The clamping part of the clamping block in this solution is designed in a wedge and step shape, which increases the range of use, expands the scope of work, and improves work efficiency; 3) This solution uses a cylindrical strong magnet to generate attraction, preventing falling and slipping that could cause injury during work from above or to the side, and achieving the effect of pre-installation and easy installation; 4) In this solution, the auxiliary bolt is a handle to help the operator grab, preventing falling and slipping, and providing the operator with an auxiliary part for applying force; 5) The wedge (cutting edge) and step of the clamping block in this solution are the stress-bearing parts, which are prone to breakage, wrinkling, roughening, dulling, or failure. They should not be discarded, but can be repaired with a file for reuse; 6) The threaded hole on the surface of the clamping block that was originally lifted in this solution is subjected to the greatest force and is prone to damage. The threaded hole can be changed to a smooth hole, and the welded nut can continue to be used; 7) The design of two clamping blocks clamping the outer ring of the pressure head is due to space constraints, meeting the requirements for online use; 8) In this design, the guide cylindrical pin helps maintain the linear movement of the two clamping blocks, and also enhances the resistance to deformation during lifting. This technology meets the requirements of space-constrained operations and can also be supplemented with some parts to form an offline disassembly mechanism (such as...). Figure 7 This allows for multiple uses in one device. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the molten iron scale.

[0033] Figure 2 A schematic diagram showing the operating status of the weighing sensor for a molten iron scale.

[0034] Figure 3 A schematic diagram of the components of the wedge-shaped lifting device for the weighing sensor of a molten iron scale.

[0035] Figure 4 A schematic diagram of the components of the stepped lifting device for the weighing sensor head of a molten iron scale.

[0036] Figure 5 A schematic diagram of the assembly of the stepped lifting device for the weighing sensor head of a molten iron scale.

[0037] Figure 6 A schematic diagram of the wedge-shaped (stepped) jacking device removing the weighing sensor pressure head of the molten iron scale;

[0038] Figure 7 A schematic diagram of a wedge-shaped (stepped) jack used with parts installed below the workpiece.

[0039] In the diagram: 1-Nut; 2-Lifting Bolt; 3-Cylindrical Strong Magnet; 4-Wedge-shaped Clamping Block (Stepped Clamping Block); 5-Auxiliary Bolt; 6-Clamping Bolt; 7-Sensor Pressure Head; 8-Guide Cylindrical Pin; 9-Base Plate; 10-Molten Iron Ladle; 11-Weighing Platform No. 1; 12-Weighing Platform No. 2; 13-Longitudinal Screw Limiter; 14-Weighing Sensor; 15-Transverse Screw Limiter; 16-Locomotive; 18-Weighing Platform; 19-Upper Base Plate; 20-Sealing Ring; 21-Upper Pressure Head; 22-Fastener; 23-Sensor; 24-Lower Pressure Head; 25-Lower Base Plate; 26-Locomotive Flatbed; 27-Support Plate; 28-Round Shaft; 29-Sleeve Parts. Detailed Implementation

[0040] To enhance understanding of the present invention, the embodiments will be described in detail below with reference to the accompanying drawings.

[0041] Example 1: See Figures 1-7 A lifting device for a molten iron scale weighing sensor is disclosed. The lifting device includes two nuts 1, six lifting bolts 2, eight cylindrical strong magnets 3, two wedge-shaped clamping blocks or two stepped clamping blocks 4, six auxiliary bolts 5, two clamping bolts 6, and two guide cylindrical pins 8. The eight cylindrical strong magnets are pressed into countersunk holes on the upper surface of the wedge-shaped or stepped clamping blocks. One end of each guide cylindrical pin is inserted into two positioning holes on the vertical plane of any one of the two wedge-shaped or stepped clamping blocks. The two clamping bolts are inserted from either side of the combined clamping blocks into elongated inner holes on the upper surface of the clamping blocks, and exit through elongated inner holes in the other clamping block, and are tightened with nuts. The lifting bolts are screwed into six internal threaded through holes on the upper surface of the combined wedge-shaped or stepped clamping blocks. The auxiliary bolts are screwed into the threads on the outer surface of the combined wedge-shaped or stepped clamping blocks. The installation method of the lifting device is as follows:

[0042] Step 1: Press the eight cylindrical strong magnets into the countersunk holes on the upper surface of the wedge-shaped clamping block or the stepped clamping block;

[0043] Step 2: Insert one end of each of the two guide cylindrical pins into the two positioning holes on the vertical plane of either of the two wedge-shaped clamping blocks or the two stepped clamping blocks;

[0044] Step 3: Align the two positioning holes on the vertical plane of the other wedge-shaped clamping block or stepped clamping block with the guide cylindrical pin and insert it to merge the two clamping blocks together;

[0045] Step 4: Insert the two clamping bolts from either side of the combined clamping block into the elongated inner hole on the upper surface of the clamping block, and out through the elongated inner hole of the other clamping block, and tighten them with nuts;

[0046] Step 5: Screw the six lifting bolts into the six internal threaded holes on the upper surface of the combined wedge-shaped clamping block or stepped clamping block;

[0047] Step 6: Screw the six auxiliary bolts into the threads on the outer plane of the combined wedge-shaped clamping block or stepped clamping block;

[0048] Step 7: The molten iron scale weighing sensor pressure head lifter is assembled according to the above method.

[0049] Example 2: See Figures 1-7 The lifting device is used to quickly remove the weighing sensor pressure head of the molten iron scale online.

[0050] The method is as follows:

[0051] Step 1: If the distance between the weighing sensor step and the base plate plane of the molten iron scale is large, select to use a stepped jack. If the gap between the weighing sensor step and the base plate plane is small or there is no gap, select to use a wedge jack, or use them alternately.

[0052] Step 2: Observe the up-and-down direction of the load cell head on the molten iron scale to see if a cylindrical strong magnet is used. Figure 6 If the downward pressure head is facing upwards, then there is no need to use a cylindrical strong magnet for adsorption and removal. If the upward pressure head is facing upwards, then a cylindrical strong magnet should be used to prevent the clamping block from falling off during installation and to provide auxiliary adsorption.

[0053] Step 3: If the pressure head is removed and the gap between the pressure head step and the base plate plane is small or non-existent, first select a wedge jack and insert the two guide cylindrical pins into the positioning holes of any wedge clamping block on the vertical plane.

[0054] Step 4: Place the two wedge-shaped clamping blocks on the base plate and clamp them together from opposite directions, ensuring that the guide cylindrical pin enters the positioning hole of the other wedge-shaped clamping block, and determine the engagement position between the step of the two wedge-shaped clamping blocks and the base plate.

[0055] Step 5: Depending on the available space, insert two clamping bolts into the through holes above the two clamping blocks, tighten the clamping bolts with nuts, and fix the two wedge-shaped clamping blocks in place.

[0056] Step 6: Depending on the space available, select any auxiliary bolts and tighten them into the threaded holes around the sides of the two clamping blocks to serve as force-applying handrails.

[0057] Step 7: Tighten the two clamping bolts alternately. The wedge-shaped cutting edge of the wedge clamping block is pressed into the joint gap between the step of the lower pressure head and the plane of the base plate. The lower pressure head is slowly lifted until the two clamping blocks are completely joined together, which proves that a large gap has been created between the step of the lower pressure head and the plane of the base plate. Then loosen the two clamping bolts and remove the wedge jack.

[0058] Step 8: Insert two guide cylindrical pins into the positioning holes on the vertical plane of any clamping block of the stepped jack. Place the two clamping blocks on the outer circle of the lower pressure head step and slowly move them to connect, ensuring that the two guide cylindrical pins enter the corresponding clamping block positioning blocks and that the force-bearing surface of the step enters the gap between the lower pressure head step and the bottom plate plane. Then insert two clamping bolts and tighten the nuts, and the two clamping blocks clamp the outer circle of the lower pressure head step.

[0059] Step 9: Tighten the auxiliary bolts for easy operation, and then screw all the lifting bolts into the threaded holes of the two clamping blocks. At this point, the stepped lifting device is installed and positioned online.

[0060] Step 10: Use a tool to rotate the lifting bolt evenly and symmetrically. At this time, the lifting device will slowly rise as a whole, and the gap between it and the base plate will become larger and larger, which proves that the pressure head is slowly rising from the inner hole of the base plate until the pressure head and the stepped lifting device are in a free state and disengaged.

[0061] Step 11: Grasp the auxiliary bolts with your hands and remove the pressure head and jack as a whole from the confined space;

[0062] Step 12: Once the weighing sensor head of the molten iron scale is removed, the stepped jacking device is disassembled, and the other heads are removed using the same method.

[0063] In the above methods, when removing stepped shafts and pins from the mounting holes, the stepped jack and wedge jack do not require the installation of a cylindrical strong magnet when removing horizontal stepped shafts and pins; this magnet is only needed when disassembling vertical or upper shaft parts. When using a stepped jack for stepped shafts and pins, it is essential to be aware of the gap (space) where the clamping block step enters at the end face of the mounting hole. When using a wedge jack for stepped shafts and pins, because it fits tightly against the end face of the mounting hole, the wedge (cutting edge) of the clamping block relies on the force applied by the clamping bolts to force the wedge (cutting edge) into the tightly fitted surface, creating a gap and loosening the two parts. Because the shaft is difficult to remove from the hole, auxiliary bolts must be installed if space permits. The jacking bolts must move simultaneously or rotate evenly and alternately, and the clamping blocks should ideally be thickened. The guide cylindrical pin is prone to bending and deformation under excessive force from the two clamping blocks; note that there may be foreign objects trapped in the base plate and the plane of the clamping blocks, or inconsistent tightening distances of the clamping bolts. This technology solves the problem of disassembling the weighing sensor indenter in confined spaces. The clamping block's working surface is designed with a wedge (cutting edge) and a stepped shape to meet the needs under different conditions. It is divided into two blocks and clamped on both sides to ensure the operation effect in confined spaces, accurately and quickly disassembling the indenter, avoiding the safety risks that occurred during the original disassembly process, and ensuring maintenance progress and production requirements.

[0064] It should be noted that the above embodiments are not intended to limit the scope of protection of the present invention. Equivalent transformations or substitutions made based on the above technical solutions all fall within the scope of protection of the claims of the present invention.

Claims

1. A lifting device for a molten iron scale weighing sensor, characterized in that, The lifting device includes two nuts, six lifting bolts, eight cylindrical strong magnets, two wedge-shaped clamping blocks or two stepped clamping blocks, six auxiliary bolts, two clamping bolts, and two guide cylindrical pins. The eight cylindrical strong magnets are pressed into the countersunk holes on the upper surface of the wedge-shaped clamping blocks or stepped clamping blocks. One end of the guide cylindrical pin is inserted into two positioning holes on the vertical plane of either of the two wedge-shaped clamping blocks or the two stepped clamping blocks; two clamping bolts are inserted from either side of the combined clamping block into the elongated inner hole on the upper plane of the clamping block, and out through the elongated inner hole of the other clamping block, and tightened with nuts; the lifting bolt is screwed into the six internal threaded through holes on the upper plane of the combined wedge-shaped clamping block or the stepped clamping block; the auxiliary bolt is screwed into the outer plane thread of the combined wedge-shaped clamping block or the stepped clamping block. The lifting device is used to quickly remove the weighing sensor pressure head of the molten iron scale online. The specific steps are as follows: Step 1: If the distance between the weighing sensor step and the base plate plane of the molten iron scale is large, select to use a stepped jack; if the gap between the weighing sensor step and the base plate plane is small or there is no gap, select to use a wedge jack, or use them alternately. Step 2: Observe the up and down direction of the weighing sensor head of the molten iron scale to see if a cylindrical strong magnet is used. If the lower head is facing upward, the cylindrical strong magnet is not needed for adsorption and can be removed. If the upper head is facing upward, a cylindrical strong magnet should be used to prevent the clamping block from falling off during installation and to provide auxiliary adsorption. Step 3: If the pressure head is removed and the gap between the pressure head step and the base plate plane is small or non-existent, first select a wedge jack and insert the two guide cylindrical pins into the positioning holes of any wedge clamping block on the vertical plane. Step 4: Place the two wedge-shaped clamping blocks on the base plate and clamp them together from opposite directions, ensuring that the guide cylindrical pin enters the positioning hole of the other wedge-shaped clamping block, and determine the engagement position between the step of the two wedge-shaped clamping blocks and the base plate. Step 5: Depending on the available space, insert two clamping bolts into the through holes above the two clamping blocks, tighten the clamping bolts with nuts, and fix the two wedge-shaped clamping blocks in place. Step 6: Depending on the space available, select any auxiliary bolts and tighten them into the threaded holes around the sides of the two clamping blocks to serve as a force-applying handrail. Step 7: Tighten the two clamping bolts alternately. The wedge-shaped cutting edge of the wedge clamping block is pressed into the joint gap between the step of the lower pressure head and the plane of the base plate. The lower pressure head is slowly lifted until the two clamping blocks are completely joined together, which proves that a large gap has been created between the step of the lower pressure head and the plane of the base plate. Then loosen the two clamping bolts and remove the wedge jack. Step 8: Insert two guide cylindrical pins into the positioning holes on the vertical plane of any clamping block of the stepped jack. Place the two clamping blocks on the outer circle of the lower pressure head step and slowly move them to connect, ensuring that the two guide cylindrical pins enter the corresponding clamping block positioning blocks and that the force-bearing surface of the step enters the gap between the lower pressure head step and the bottom plate plane. Then insert two clamping bolts and tighten the nuts, and the two clamping blocks clamp the outer circle of the lower pressure head step. Step 9: Tighten the auxiliary bolts for easy operation, and then screw all the lifting bolts into the threaded holes of the two clamping blocks. At this point, the stepped lifting device is installed and positioned online. Step 10: Use a tool to rotate the lifting bolt evenly and symmetrically. At this time, the lifting device will slowly rise as a whole, and the gap between it and the base plate will become larger and larger, which proves that the pressure head is slowly rising from the inner hole of the base plate until the pressure head and the stepped lifting device are in a free state and disengaged. Step 11: Grasp the auxiliary bolts with your hands and remove the pressure head and jack as a whole from the confined space; Step 12: Once the weighing sensor head of the molten iron scale is removed, the stepped jacking device is disassembled, and the other heads are removed using the same method.

2. The iron scale weighing sensor lifting device according to claim 1, characterized in that, The installation method for the jack is as follows: Step 1: Press the eight cylindrical strong magnets into the countersunk holes on the upper surface of the wedge-shaped clamping block or the stepped clamping block; Step 2: Insert one end of each of the two guide cylindrical pins into the two positioning holes on the vertical plane of either of the two wedge-shaped clamping blocks or the two stepped clamping blocks; Step 3: Align the two positioning holes on the vertical plane of the other wedge-shaped clamping block or stepped clamping block with the guide cylindrical pin and insert it to merge the two clamping blocks together; Step 4: Insert the two clamping bolts from either side of the combined clamping block into the elongated inner hole on the upper surface of the clamping block, and out through the elongated inner hole of the other clamping block, and tighten them with nuts; Step 5: Screw the six lifting bolts into the six internal threaded holes on the upper surface of the combined wedge-shaped clamping block or stepped clamping block; Step 6: Screw the six auxiliary bolts into the outer plane threads of the combined wedge-shaped clamping block or stepped clamping block; Step 7: The molten iron scale weighing sensor pressure head lifter is assembled according to the above method.

3. The iron scale weighing sensor lifting device according to claim 2, characterized in that, In the above method, Used for removing stepped shafts and pins from the mounting holes.

4. The iron scale weighing sensor lifting device according to claim 3, characterized in that, In the above methods, when using stepped jacks and wedge jacks with horizontal stepped shafts and pins, it is not necessary to install cylindrical strong magnets; they are only installed when disassembling vertical and upper shaft-type parts.

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