Anti-shaking hoisting device and method based on nodular cast iron pipe jacking mold production

Abstract

The application discloses a rocking-preventing hoisting device and method based on nodular cast iron pipe jacking mold production and relates to the technical field of hoisting equipment. Through the electromagnetic damping principle of "magnetic field, conductor cutting and ampere force resistance", electromagnets are alternately arranged to form a closed magnetic field loop perpendicular to the vertical axis of the steel wire. When the steel wire shakes under external force, the steel wire as a conductor cuts the magnetic induction lines to generate an induced current. The induced current is subjected to an ampere force in the magnetic field, which is opposite to the shaking direction, so that the shaking energy is rapidly attenuated. Compared with the traditional mechanical damping, the mechanism has no mechanical contact wear, the response time is greatly shortened, and the problems of damping hysteresis and slow shaking attenuation of the traditional device are solved. Meanwhile, the thermal energy driving unit drives the resistance adjusting sliding block through the thermal expansion of the heat conducting oil, automatically reduces the resistance of the sliding resistor, further increases the induced current and the damping force, and significantly shortens the shaking attenuation time compared with the fixed damping scheme.

Description

Technical Field

[0001] This invention relates to the field of hoisting equipment technology, specifically to an anti-swaying hoisting device and method based on ductile iron jacking pipe molds. Background Technology

[0002] Ductile iron jacking pipe is an underground pipeline material made from ductile iron and suitable for pipe jacking construction. It is one of the upgraded alternatives to traditional concrete jacking pipes and steel pipes. Currently, centrifugal casting molds for ductile iron pipes are specialized forming tools adapted to centrifugal casting processes. Their core function is to use the centrifugal force generated by high-speed rotation to make molten ductile iron spread evenly along the inner wall of the mold, cool and solidify, and finally form ductile iron pipes with uniform wall thickness, dense structure, and high dimensional accuracy.

[0003] The ductile iron jacking pipe casting equipment mainly consists of a mold body, a support and drive unit, a cooling system, and a sealing and protection system. Due to the large weight and size of the ductile iron pipe mold body, the installation or disassembly of it and the support and drive unit requires specialized hoisting equipment; manual labor or simple tools cannot complete the handling and positioning.

[0004] Referring to the omnidirectional lifting equipment disclosed in patent application CN114408743B, the spacing can be adjusted through the designed adjustable spacing component to adapt to the lifting and transportation needs of parts of different sizes; the rotating component designed in this invention can rotate the transported object in all directions, making it easy to adjust the lifting angle according to actual needs; the boxing component designed in this invention has a liftable guardrail, which can directly put the parts into the box without lifting holes and fasteners, saving lifting time.

[0005] The aforementioned omnidirectional lifting equipment has the following drawbacks in practical use: Existing hoisting methods mostly rely on balance beams and flexible slings, which are passive anti-sway designs. They are easily affected by airflow in the workshop and fluctuations in lifting speed, resulting in lateral swaying and torsion. Swaying can cause the mold and equipment to collide, causing interface deformation and scratches on the inner wall, which directly affects the quality of the jacking pipe casting. At the same time, swaying can damage the hoisting positioning accuracy, causing the mold and casting machine to have out-of-tolerance alignment, reducing production efficiency, and in severe cases, causing the mold to slip off, posing a safety hazard.

[0006] Therefore, this invention proposes an anti-swaying hoisting device and method based on ductile iron jacking pipe mold production to solve the above problems. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides an anti-swaying hoisting device and method based on ductile iron jacking pipe mold production. This solves the problem that existing hoisting methods rely heavily on balance beams and flexible slings, which are passive anti-sway designs and are easily affected by workshop airflow and lifting speed fluctuations, resulting in lateral swaying and torsion. Swaying can cause the mold to collide with the equipment, causing interface deformation and inner wall scratches, directly affecting the quality of the jacking pipe casting. Simultaneously, swaying can compromise hoisting positioning accuracy, leading to misalignment between the mold and the casting machine, reducing production efficiency, and in severe cases, causing mold slippage and posing safety hazards.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an anti-swaying hoisting device based on ductile iron jacking pipe mold production, comprising a support column and an electric turntable at its top. A boom is mounted on the top of the turntable, and a hoisting mechanism for hoisting the ductile iron jacking pipe mold is mounted on the outside of the boom. The hoisting mechanism further includes a hoisting box located below the boom. Power components for driving the hoisting box to move along the outer wall of the boom are mounted on the front and rear side walls of the hoisting box. A second motor is also fixedly mounted on the outer wall of the hoisting box. The output shaft of the second motor rotates through the hoisting box and is fixedly mounted on a winding shaft. Two winding drums are fixedly sleeved on both sides of the outer wall of the winding shaft. Steel wires are wound around the outer walls of both winding drums. A hook for performing hoisting operations is fixedly mounted at the bottom ends of the two steel wires. A first stabilizing component and a second stabilizing component are respectively mounted on the bottom sides of the hoisting box to respectively prevent the swaying of the corresponding steel wires.

[0009] Furthermore, the power assembly includes a back plate fixedly installed on both sides of the front and back of the hoisting box. A first motor is fixedly installed on the back plate, and the output shaft of the first motor rotates through the back plate and is fixedly installed with a drive wheel. The first motor is connected to the terminal control device via wireless communication.

[0010] Furthermore, the first stabilizing component and the second stabilizing component have the same structure. The first stabilizing component includes a mounting frame fixedly installed at the bottom of the hoisting box. An electromagnetic component is fixedly installed on the outer wall of the mounting frame. The top and bottom of the electromagnetic component are detachably installed with annular cover plates by bolts. The inner interiors of the upper and lower annular cover plates are respectively fixedly installed with a first annular bearing ring and a second annular bearing ring. The second annular bearing ring and the first annular bearing ring have the same structure. The inner wall of the first annular bearing ring is recessed inward to form an annular groove. The inner interiors of the second annular bearing ring and the first annular bearing ring are jointly provided with a conductive bridging component. A dust removal component for cleaning the outer wall of the steel wire is provided above the conductive bridging component.

[0011] Furthermore, the dust removal assembly includes an annular tube fixedly installed at the bottom of the hoisting box, with multiple air jet holes evenly opened on the inner wall of the annular tube. A second airbag is installed below the annular tube, and the second airbag and the annular tube are connected by an air supply pipe. The second airbag is fixedly installed in an annular groove on the inner wall of the first annular bearing ring. A cleaning ring is also fixedly installed inside the hoisting box, with multiple cleaning blades evenly fixedly installed on the inner wall of the cleaning ring.

[0012] Furthermore, the conductive bridging component includes a damping resistor, on the outside of which a thermal drive unit is fitted. Both the output and input ends of the damping resistor are electrically connected to wires. A sliding rheostat is connected in series in the upper wire. A resistance adjustment slider for adjusting the resistance value is slidably disposed on the side wall of the sliding rheostat. When the resistance adjustment slider slides upward, it is used to decrease the resistance value, and when it slides downward, it is used to increase the resistance value. The ends of the wires at the upper and lower positions are respectively connected to an upper brush unit and a lower brush unit.

[0013] Furthermore, the upper brush unit and the lower brush unit have the same structure. The upper brush unit includes an annular frame, the outer wall of which is recessed inward to form an annular groove. A first airbag is fixedly disposed in the annular groove, and a conductive unit is also fixedly disposed at the center of the annular frame.

[0014] Furthermore, the conductive unit includes a conductive metal ring and a terminal fixedly disposed on one side of the top of the conductive metal ring. Multiple grooves are evenly formed on the inner wall of the conductive metal ring, and a conductive slider is slidably disposed in each groove. An arc-shaped graphite plate is fixedly disposed on the side wall of the conductive slider. A non-closed ring structure formed by multiple arc-shaped graphite plates is slidably sleeved on the outer wall of the steel wire. A spring is fixedly disposed between the conductive slider and the groove. The terminal in the upper brush unit and the lower brush unit is electrically connected to the ends of the wires at the upper and lower positions, respectively.

[0015] Furthermore, the thermal drive unit includes a heat-conducting sleeve fixedly mounted on the side wall of the mounting bracket. The heat-conducting sleeve is fitted onto the outer wall of the damping resistor. An oil storage cavity is opened inside the heat-conducting sleeve and filled with heat-conducting oil. An annular piston is slidably and sealed inside the oil storage cavity. A push-pull rod is fixedly mounted on one side of the top of the annular piston. The push-pull rod slides through the heat-conducting sleeve and is fixedly connected to the bottom of the resistance adjustment slider.

[0016] Furthermore, the electromagnetic component includes a support cylinder, on the inner wall of which multiple mounting slots are evenly provided. Each mounting slot contains a fixed electromagnet, and the N poles and S poles of the multiple electromagnets are arranged alternately to ensure that the magnetic field lines start from the N pole, pass through the central area of ​​the support cylinder, and finally return to the S pole, forming a closed magnetic field loop. The direction of the magnetic field lines is perpendicular to the vertical axis of the steel wire at the corresponding position.

[0017] This invention also discloses an anti-swaying hoisting method based on ductile iron jacking pipe molds, used for anti-swaying hoisting devices produced based on ductile iron jacking pipe molds. The method includes the following steps: Step 1: Securely attach the vacuum lifting device and the outer wall of the ductile iron jacking pipe mold using adsorption. Step 2: Connect the hook and the vacuum lifting device. After the trial lift is completed, the second motor drives the winding shaft to rotate synchronously and wind up the two steel wires. The hook gradually lifts the vacuum lifting device upwards. At the same time, the power unit drives the lifting box to move along the outer wall of the boom until the ductile iron jacking pipe mold is lifted to the designated position. Step 3: During the hoisting and movement of the ductile iron jacking pipe mold, the first and second stabilizing components gradually reduce the swaying force of the steel wire by utilizing the principle that the movement of a current-carrying conductor in a magnetic field is hindered, thus ensuring that the ductile iron jacking pipe mold is hoisted smoothly.

[0018] This invention provides an anti-swaying hoisting device and method based on ductile iron jacking pipe mold production. Compared with the prior art, it has the following advantages: 1. An anti-swaying hoisting device and method based on ductile iron jacking pipe mold production: This device utilizes the electromagnetic damping principle of "magnetic field, conductor cutting, and Ampere force resistance." Electromagnets are alternately arranged to form a closed magnetic field loop perpendicular to the vertical axis of the steel wire. When the steel wire is subjected to external force and sways, the steel wire, as a conductor, cuts the magnetic field lines, generating an induced current. This induced current experiences an Ampere force in the magnetic field, opposite to the direction of swaying, thus achieving rapid attenuation of swaying energy. Compared with traditional mechanical damping, this mechanism eliminates mechanical contact wear and significantly shortens the response time. It can effectively suppress different types of swaying, such as high-frequency and low-frequency swaying, solving the problems of damping lag and slow swaying attenuation in traditional devices. This ensures that the ductile iron jacking pipe mold maintains a vertically stable state throughout the entire process of lifting, lowering, and translating.

[0019] 2. An anti-swaying hoisting device and method based on ductile iron jacking pipe mold production: By setting up a thermal energy drive unit and utilizing a thermal energy-driven adaptive resistance adjustment structure, dynamic matching between damping force and sway amplitude is achieved. When the sway amplitude of the steel wire increases, the heat generated by the damping resistor cannot be dissipated in time, causing the heat transfer oil to expand and push the annular piston upward, which in turn drives the resistance adjustment slider to reduce the resistance value of the sliding rheostat, increasing the closed-loop current and simultaneously enhancing the damping force. This design can achieve adaptive adjustment of "the greater the sway amplitude, the stronger the damping force" without manual intervention. Compared with the fixed damping scheme, the sway decay time is significantly shortened, ensuring that the jacking pipe mold can still maintain vertical stability under interference such as wind and equipment vibration, and greatly improving the hoisting positioning accuracy.

[0020] 3. An anti-swaying hoisting device and method based on ductile iron jacking pipe mold production: By setting a conductive bridging component, the arc-shaped graphite plate elastically abuts against the outer wall of the steel wire through a spring. Even if the steel wire sways horizontally, the conductive slider slides along the groove to ensure that part of the arc-shaped graphite plate is in close contact with the steel wire, ensuring continuous conduction of the closed circuit and avoiding interruption of damping force due to poor contact. Combined with the buffering effect of the first airbag, it can absorb the mechanical impact caused by the swaying of the steel wire, prevent damage to the conductive component, and further ensure the stability of the anti-swaying mechanism. At the same time, the first airbag squeezes the second airbag to generate high-pressure gas, which blows the surface of the steel wire through the jet hole of the annular pipe. Combined with the brush bristles of the cleaning ring to remove dust and impurities, it ensures the conductive contact effect between the steel wire and the arc-shaped graphite plate, reduces the wear of the arc-shaped graphite plate, and significantly extends the service life of the arc-shaped graphite plate.

[0021] 4. Anti-swaying hoisting device and method based on ductile iron jacking pipe mold production: The electromagnet assembly supports the input of adjustable current of different magnitudes. The magnetic field strength can be flexibly adjusted according to the size and weight of the jacking pipe mold. That is, the heavier the mold, the larger the current input, the stronger the magnetic field, and the stronger the induced current and damping force generated when the steel wire sways. This ensures the stability of the hoisting of large-tonnage molds, while avoiding the decrease in hoisting efficiency of small-sized molds due to excessive damping force. It is compatible with steel wire ropes with smaller diameters, covering most hoisting scenarios of jacking pipe molds, and greatly improving practicality.

[0022] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the first overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the second overall three-dimensional structure of the present invention; Figure 3 This is a schematic diagram of the overall structure of the hoisting mechanism of the present invention; Figure 4 This is a first cross-sectional view of the hoisting mechanism of the present invention; Figure 5 This is a second sectional view of the hoisting mechanism of the present invention; Figure 6 This is a schematic diagram of the structure of the first stabilizing component of the present invention; Figure 7 For the present invention Figure 6 A magnified structural diagram of part A in the diagram; Figure 8 This is a schematic cross-sectional view of the bearing cylinder structure of the present invention; Figure 9 For the present invention Figure 8 A magnified structural diagram of part B in the diagram; Figure 10 This is a schematic diagram of the decomposed state structure of the first stable component of the present invention; Figure 11 For the present invention Figure 10 A magnified structural diagram of part C in the diagram; Figure 12 This is a schematic diagram of the first overall structure of the conductive unit of the present invention; Figure 13 This is a schematic diagram of the second overall structure of the conductive unit of the present invention; Figure 14 This is a schematic diagram of the disassembled structure of the electromagnetic component of the present invention; Figure 15 This is a schematic diagram of the ductile iron jacking pipe mold structure of the present invention.

[0024] In the diagram: 1. Support column; 2. Electric turntable; 3. Boom; 4. Lifting mechanism; 41. Lifting box; 42. First motor; 43. Drive wheel; 44. Second motor; 45. Rewinding shaft; 46. Rewinding drum; 47. Steel wire; 48. Hook; 49. First stabilizing component; 491. Mounting frame; 492. Electromagnetic component; 4921. Bearing cylinder; 4922. Mounting groove; 4923. Electromagnet; 493. Annular cover plate; 494. Damping resistor; 495. Wire; 496. Heat-conducting jacket; 497. Oil reservoir; 498. Annular piston; 499. Push-pull rod; 4910, Sliding rheostat; 4911, Resistance adjustment slider; 4912, Upper brush unit; 49121, Ring frame; 49122, First airbag; 49123, Conductive unit; a1, Conductive metal ring; a2, Terminal; a3, Slide groove; a4, Conductive slider; a5, Arc-shaped graphite plate; a6, Spring; 4913, Lower brush unit; 4914, Ring tube; 4915, Air supply pipe; 4916, Scraping ring; 4917, Second airbag; 4918, First annular bearing ring; 4919, Second annular bearing ring; 410, Second stabilizing component. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] This invention provides three technical solutions: an anti-swaying hoisting device based on ductile iron jacking pipe molds, specifically including the following embodiments: like Figures 1-5 , Figure 15 The first embodiment is shown: an anti-swaying hoisting device based on ductile iron jacking pipe mold production, including a support column 1 and an electric turntable 2 disposed at its top. A boom 3 is disposed on the top of the electric turntable 2. A hoisting mechanism 4 for hoisting the ductile iron jacking pipe mold is disposed outside the boom 3. The hoisting mechanism 4 also includes a hoisting box 41 disposed below the boom 3. Power components for driving the hoisting box 41 to move along the outer wall of the boom 3 are disposed on the front and rear side walls of the hoisting box 41. The outer wall of the hoisting box 41 also has... A second motor 44 is fixedly installed. The output shaft of the second motor 44 rotates through the hoisting box 41 and is fixedly installed with a winding shaft 45. Two winding drums 46 are fixedly sleeved on both sides of the outer wall of the winding shaft 45. Steel wires 47 are wound on the outer walls of the two winding drums 46. The bottom ends of the two steel wires 47 are fixedly installed with hooks 48 for performing hoisting operations. A first stabilizing component 49 and a second stabilizing component 410 are respectively installed on the bottom sides of the hoisting box 41 to prevent the swaying of the corresponding steel wires 47.

[0027] In this embodiment, the power assembly includes back plates fixedly mounted on both the front and back sides of the hoisting box 41. A first motor 42 is fixedly mounted on the back plate, and the output shaft of the first motor 42 rotates through the back plate and is fixedly mounted with drive wheels 43. The first motor 42 is connected to a terminal control device via wireless communication. Horizontally mounted support plates are fixedly mounted on the bottom of both the front and back sides of the boom 3. Two drive wheels 43 on the front side are rolled on the front support plate, and two drive wheels 43 on the back side are rolled on the back support plate.

[0028] like Figures 6-13 The second embodiment is shown, which differs from the first embodiment in that: the first stabilizing component 49 and the second stabilizing component 410 have the same structure. The first stabilizing component 49 includes a mounting bracket 491 fixedly installed at the bottom of the hoisting box 41. An electromagnetic component 492 is fixedly installed on the outer wall of the mounting bracket 491. The top and bottom of the electromagnetic component 492 are detachably provided with annular cover plates 493 by bolts. The inner walls of the upper and lower annular cover plates 493 are respectively fixedly provided with a first annular bearing ring 4918 and a second annular bearing ring 4919. The second annular bearing ring 4919 and the first annular bearing ring 4918 have the same structure. The inner wall of the first annular bearing ring 4918 is recessed inward to form an annular groove. The inner walls of the second annular bearing ring 4919 and the first annular bearing ring 4918 are jointly provided with a conductive bridging component. A dust removal component for cleaning the outer wall of the steel wire 47 is provided above the conductive bridging component.

[0029] In this embodiment, the dust removal assembly includes an annular pipe 4914 fixedly disposed at the bottom of the hoisting box 41. Multiple air jet holes are evenly provided on the inner wall of the annular pipe 4914. A second airbag 4917 is disposed below the annular pipe 4914. The second airbag 4917 and the annular pipe 4914 are connected by an air supply pipe 4915. The second airbag 4917 is fixedly disposed in the annular groove on the inner wall of the first annular bearing ring 4918. A cleaning ring 4916 is also fixedly disposed inside the hoisting box 41. Multiple cleaning blades are evenly fixedly disposed on the inner wall of the cleaning ring 4916. The diameter of the channel through which the steel wire 47 passes inside the scraping ring 4916 is slightly larger than the diameter of the circular outline formed by multiple arc-shaped graphite plates a5. A limiting ring is also fixedly installed at the bottom of the lifting box 41, below the first stabilizing component 49 and the second stabilizing component 410, to limit the maximum swing amplitude of the steel wire 47. The limiting ring is fitted over the steel wire 47 at the corresponding position and allows the steel wire 47 to swing freely within the range inside the limiting ring, preventing damage to the arc-shaped graphite plates a5 from excessive swinging. A one-way air inlet is fixedly installed on one side of the outer wall of the second airbag 4917, allowing the second airbag 4917 to draw air through the one-way air inlet to return to its original state after being compressed.

[0030] In this embodiment, the conductive bridging assembly includes a damping resistor 494, which is externally fitted with a thermal drive unit. Both the output and input terminals of the damping resistor 494 are electrically connected to wires 495. A sliding rheostat 4910 is connected in series within the upper wire 495. A resistance adjustment slider 4911 is slidably mounted on the side wall of the rheostat 4910 to adjust its resistance. The slider 4911 decreases the resistance value when sliding upwards and increases it when sliding downwards. The ends of the upper and lower wires 495 are respectively connected to an upper brush unit 4912 and a lower brush unit 4913. The damping resistor 494 is fixed to the side wall of the mounting bracket 491 via a thermally conductive sleeve 496. The wires 495 are flexible and can bend when the upper brush unit 4912 or the lower brush unit 4913 is displaced.

[0031] In this embodiment, the upper brush unit 4912 and the lower brush unit 4913 have the same structure. The upper brush unit 4912 includes an annular frame 49121. The outer wall of the annular frame 49121 is recessed inward to form an annular groove. A first airbag 49122 is fixedly disposed in the annular groove. A conductive unit 49123 is also fixedly disposed at the center of the annular frame 49121.

[0032] In this embodiment, the conductive unit 49123 includes a conductive metal ring a1 and a terminal a2 fixedly disposed on one side of the top of the conductive metal ring a1. Multiple grooves a3 are evenly provided on the inner wall of the conductive metal ring a1. A conductive slider a4 is slidably disposed in each groove a3. An arc-shaped graphite plate a5 is fixedly disposed on the side wall of the conductive slider a4. The non-closed ring structure formed by multiple arc-shaped graphite plates a5 is slidably sleeved on the outer wall of the steel wire 47. A spring a6 is fixedly disposed between the conductive slider a4 and the groove a3. The terminal a2 in the upper brush unit 4912 and the lower brush unit 4913 are electrically connected to the ends of the wires 495 at the upper and lower positions, respectively. Multiple curved graphite plates a5, conductive slider a4, and conductive metal ring a1 together form a conductor structure. When the steel wire 47 produces the maximum sway amplitude, the pushing force generated on the curved graphite plate a5 makes the gap between two adjacent curved graphite plates a5 much smaller than the diameter of the steel wire 47. That is, the steel wire 47 will not "escape" through the gap between two adjacent curved graphite plates a5.

[0033] In this embodiment, the thermal drive unit includes a heat-conducting sleeve 496 fixedly mounted on the side wall of the mounting bracket 491. The heat-conducting sleeve 496 is fitted onto the outer wall of the damping resistor 494. An oil storage cavity 497 is opened inside the heat-conducting sleeve 496 and filled with heat-conducting oil. An annular piston 498 is slidably and sealed inside the oil storage cavity 497. A push-pull rod 499 is fixedly mounted on one side of the top of the annular piston 498. The push-pull rod 499 slides through the heat-conducting sleeve 496 and is fixedly connected to the bottom of the resistance adjustment slider 4911.

[0034] like Figure 14The third embodiment is shown, which differs from the second embodiment in that: the electromagnetic component 492 includes a support cylinder 4921, on which a plurality of mounting grooves 4922 are evenly provided on the inner wall. Each mounting groove 4922 is fixedly provided with an electromagnet 4923. The N pole and S pole of the plurality of electromagnets 4923 are arranged alternately in sequence to ensure that the magnetic field lines start from the N pole, pass through the central area of ​​the support cylinder 4921, and finally return to the S pole, forming a closed magnetic field loop, and the direction of the magnetic field lines is perpendicular to the vertical axis of the steel wire 47 at the corresponding position. The 4923 electromagnet mainly consists of an electromagnetic coil and a magnetic core. The electromagnetic coil is wound with copper enameled wire, with 1500-2000 turns and a rated voltage of 24V DC. When an adjustable current of 0-5A is applied, it generates an attraction force of 0-800N, suitable for steel wire ropes with diameters of 10-50mm. The magnetic core is made of electrical pure iron and features an arc-shaped boss structure. The curvature of the boss matches the outer circle of the steel wire rope. The outer side of the core is encapsulated with the coil, while the inner side is spaced 5mm-8mm from the steel wire rope to enhance the magnetic field focusing effect. The 4923 electromagnet is encapsulated with epoxy resin for waterproofing, dustproofing, and insulation protection, with an insulation rating of IP65, making it suitable for complex environments such as workshops and outdoors. Wear-resistant insulating gaskets are attached to the inner side of the magnetic core to prevent wear and short-circuit risks caused by direct contact between the steel wire rope and the core.

[0035] This invention also provides an anti-swaying hoisting method based on ductile iron jacking pipe molds, for use in anti-swaying hoisting devices produced based on ductile iron jacking pipe molds. The method includes the following steps: Step 1: Stable adsorption connection is made between the vacuum lifting device and the outer wall of the ductile iron jacking pipe mold. The vacuum lifting device is existing technology, and its specific structure and working principle will not be described here. Step 2: Connect the hook 48 to the vacuum lifting device. After the trial lift is completed, the second motor 44 drives the winding shaft 45 to rotate synchronously and wind up the two steel wires 47. The hook 48 gradually lifts the vacuum lifting device upward. At the same time, the power unit drives the lifting box 41 to move along the outer wall of the boom 3 until the ductile iron jacking pipe mold is lifted to the designated position. Step 3: During the hoisting and movement of the ductile iron jacking mold, the first stabilizing component 49 and the second stabilizing component 410 gradually reduce the swaying force of the steel wire 47 by utilizing the principle that the movement of a current-carrying conductor in a magnetic field is hindered, thus ensuring that the ductile iron jacking mold is hoisted smoothly.

[0036] The specific process is as follows: Before hoisting, the circuits of multiple electromagnets 4923 are connected, and a preset current is applied. The N poles and S poles of the multiple electromagnets 4923 are arranged alternately to ensure that the magnetic field lines start from the N pole, pass through the central area of ​​the bearing cylinder 4921, and finally return to the S pole, forming a closed magnetic field loop. The direction of the magnetic field lines is perpendicular to the vertical axis of the steel wire 47 at the corresponding position.

[0037] During the lifting and moving of the ductile iron jacking pipe mold by the hook 48, and when the two steel wires 47 are vertically stationary, there is no horizontal movement and no cutting of the magnetic field lines formed by multiple electromagnets 4923. There is no induced current in the closed circuit formed by the damping resistor 494, the wire 495, the sliding rheostat 4910, the two conductive units 49123 and the part of the steel wire 47 passing through the bearing cylinder 4921. The device does not generate damping force and does not affect the normal vertical lifting and lowering of the steel wire rope.

[0038] When the steel wire 47 sways horizontally due to wind or equipment vibration, the steel wire 47, acting as a conductor, pushes part of the arc-shaped graphite plate a5 to move during the swaying process. The conductive slider a4 overcomes the elastic force of the spring a6 and slides inward along the inner wall of the slide groove a3, always maintaining a tight sliding connection between part of the arc-shaped graphite plate a5 and the outer wall of the steel wire 47. When the steel wire 47 sways and drives the conductive unit 49123 to move as a whole, the inner walls of the first airbag 49122 and the first annular bearing ring 4918 come into contact and produce a buffering effect. At the same time, when the first airbag 49122 squeezes the second airbag 4917, the air inside the second airbag 4917 is squeezed out and input into the annular pipe 4914 through the air supply pipe 4915. The air is blown from multiple air holes on the inner wall of the annular pipe 4914 onto the surface of the steel wire 47 to remove residual dust and impurities from the surface of the steel wire 47. Ring 4916 further cleans stubborn stains to ensure good conductivity between steel wire 47 and arc-shaped graphite plate a5, i.e., to maintain the circuit. In the horizontal magnetic field formed by multiple electromagnets 4923, it cuts magnetic field lines. According to the law of electromagnetic induction, an induced current is generated in the closed loop formed by damping resistor 494, wire 495, sliding rheostat 4910, two conductive units 49123 and part of steel wire 47 passing through bearing cylinder 4921. The induced current is subjected to Ampere force in the horizontal magnetic field formed by multiple electromagnets 4923. According to the left-hand rule, the direction of Ampere force is opposite to the direction of the swaying of steel wire 47, i.e., it generates resistance to relative motion and forms electromagnetic damping force. The greater the swaying amplitude of steel wire 47, the faster the cutting speed, the greater the induced current, and the stronger the damping force, thereby rapidly attenuating the swaying energy of steel wire 47 until it returns to a vertical and static state. During the swaying process of the steel wire 47 during hoisting, the current generated in the circuit of the damping resistor 494 converts electrical energy into heat energy as it passes through the damping resistor 494. This heat is then transferred to the heat-conducting oil in the oil storage chamber 497 through the inner wall of the heat-conducting sleeve 496, and the heat is dissipated into the air through the heat-conducting oil. When the swaying amplitude of the steel wire 47 increases, the current value in the circuit where the wire 495 is located increases. The heat-conducting oil cannot dissipate the heat in time, causing the heat-conducting oil to expand and push the annular piston 498 upward along the inner wall of the oil storage chamber 497. This, in turn, drives the push-pull rod 499 upward to push the resistance adjusting slider 4911. At this time, the resistance of the sliding rheostat 4910 decreases, and the current in part of the steel wire 47 passing through the bearing cylinder 4921 increases. The larger the current, the stronger the damping force, which makes the resistance encountered by the steel wire 47 during the swaying process greater, further shortening the swaying time of the steel wire 47.

[0039] Secondly, different currents are input into the electromagnet 4923 according to the specifications of the hoisting ductile iron jacking pipe mold. That is, the larger the size of the hoisting ductile iron jacking pipe mold, the larger the current input into the electromagnet 4923, the stronger the magnetic field formed, the larger the induced current generated when the steel wire 47 swings and cuts the magnetic field lines, and the stronger the resistance generated. Conversely, the smaller the size of the hoisting ductile iron jacking pipe mold, the smaller the current input into the electromagnet 4923.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An anti-swaying hoisting device based on ductile iron jacking pipe mold production, comprising a support column (1) and an electric turntable (2) disposed at its top, wherein a boom (3) is disposed at the top of the electric turntable (2), and a hoisting mechanism (4) for hoisting the ductile iron jacking pipe mold is disposed outside the boom (3), characterized in that: The hoisting mechanism (4) also includes a hoisting box (41) located below the boom (3). The hoisting box (41) has a power assembly on its front and rear side walls for driving the hoisting box (41) to move along the outer wall of the boom (3). A second motor (44) is also fixedly installed on the outer wall of the hoisting box (41). The output shaft of the second motor (44) rotates through the hoisting box (41) and is fixedly installed with a winding shaft (45). Two winding drums (46) are fixedly sleeved on both sides of the outer wall of the winding shaft (45). Steel wires (47) are wound on the outer walls of the two winding drums (46). The bottom ends of the two steel wires (47) are fixedly installed with hooks (48) for performing hoisting operations. A first stabilizing component (49) and a second stabilizing component (410) are respectively installed on the bottom sides of the hoisting box (41) to prevent the swaying of the corresponding steel wires (47). The first stabilizing component (49) and the second stabilizing component (410) have the same structure. The first stabilizing component (49) includes a mounting frame (491) fixedly installed at the bottom of the hoisting box (41). An electromagnetic component (492) is fixedly installed on the outer wall of the mounting frame (491). The top and bottom of the electromagnetic component (492) are detachably provided with annular cover plates (493) by bolts. The inner walls of the two annular cover plates (493) are respectively fixedly provided with a first annular bearing ring (4918) and a second annular bearing ring (4919). The second annular bearing ring (4919) and the first annular bearing ring (4918) have the same structure. The inner wall of the first annular bearing ring (4918) is recessed inward to form an annular groove. The inner walls of the second annular bearing ring (4919) and the first annular bearing ring (4918) are jointly provided with a conductive bridging component. A dust removal component for cleaning the outer wall of the steel wire (47) is provided above the conductive bridging component. The electromagnetic component (492) includes a support cylinder (4921). Multiple mounting slots (4922) are evenly provided on the inner wall of the support cylinder (4921). An electromagnet (4923) is fixedly installed in each mounting slot (4922). The N pole and S pole of the multiple electromagnets (4923) are arranged alternately in sequence to ensure that the magnetic field lines start from the N pole, pass through the central area of ​​the support cylinder (4921), and finally return to the S pole to form a closed magnetic field loop. The direction of the magnetic field lines is perpendicular to the vertical axis of the steel wire (47) at the corresponding position.

2. The anti-swaying hoisting device based on ductile iron jacking pipe mold production according to claim 1, characterized in that: The power assembly includes a back plate fixedly installed on both sides of the front and back of the hoisting box (41). A first motor (42) is fixedly installed on the back plate. The output shaft of the first motor (42) rotates through the back plate and is fixedly installed with a drive wheel (43). The first motor (42) is connected to the terminal control device via wireless communication.

3. The anti-swaying hoisting device based on ductile iron jacking pipe mold production according to claim 1, characterized in that: The dust removal assembly includes an annular tube (4914) fixedly installed at the bottom of the hoisting box (41). Multiple air jet holes are evenly provided on the inner wall of the annular tube (4914). A second airbag (4917) is provided below the annular tube (4914). The second airbag (4917) and the annular tube (4914) are connected by an air supply pipe (4915). The second airbag (4917) is fixedly installed in the annular groove on the inner wall of the first annular bearing ring (4918). A cleaning ring (4916) is also fixedly installed inside the hoisting box (41). Multiple cleaning blades are evenly fixedly installed on the inner wall of the cleaning ring (4916).

4. The anti-swaying hoisting device based on ductile iron jacking pipe mold production according to claim 1, characterized in that: The conductive bridging assembly includes a damping resistor (494), which is fitted with a thermal drive unit. The output and input terminals of the damping resistor (494) are electrically connected to wires (495). A sliding rheostat (4910) is connected in series in the upper wire (495). A resistance adjustment slider (4911) is slidably disposed on the side wall of the sliding rheostat (4910) for adjusting its resistance. When the resistance adjustment slider (4911) slides upward, it is used to decrease the resistance value, and when it slides downward, it is used to increase the resistance value. The ends of the upper and lower wires (495) are respectively connected to an upper brush unit (4912) and a lower brush unit (4913).

5. The anti-swaying hoisting device based on ductile iron jacking pipe mold production according to claim 4, characterized in that: The upper brush unit (4912) and the lower brush unit (4913) have the same structure. The upper brush unit (4912) includes an annular frame (49121). The outer wall of the annular frame (49121) is recessed inward to form an annular groove. A first airbag (49122) is fixedly installed in the annular groove. A conductive unit (49123) is also fixedly installed at the center of the annular frame (49121).

6. The anti-swaying hoisting device based on ductile iron jacking pipe mold production according to claim 5, characterized in that: The conductive unit (49123) includes a conductive metal ring (a1) and a terminal (a2) fixedly disposed on one side of the top of the conductive metal ring (a1). Multiple grooves (a3) ​​are evenly provided on the inner wall of the conductive metal ring (a1). A conductive slider (a4) is slidably disposed in each groove (a3). An arc-shaped graphite plate (a5) is fixedly disposed on the side wall of the conductive slider (a4). The non-closed ring structure formed by multiple arc-shaped graphite plates (a5) is slidably sleeved on the outer wall of the steel wire (47). A spring (a6) is fixedly disposed between the conductive slider (a4) and the groove (a3). The terminal (a2) in the upper brush unit (4912) and the lower brush unit (4913) is electrically connected to the ends of the wires (495) at the upper and lower positions, respectively.

7. The anti-swaying hoisting device based on ductile iron jacking pipe mold production according to claim 4, characterized in that: The thermal drive unit includes a heat-conducting sleeve (496) fixedly mounted on the side wall of the mounting bracket (491). The heat-conducting sleeve (496) is fitted onto the outer wall of the damping resistor (494). An oil storage cavity (497) is opened inside the heat-conducting sleeve (496), and the oil storage cavity (497) is filled with heat-conducting oil. An annular piston (498) is slidably sealed inside the oil storage cavity (497). A push-pull rod (499) is fixedly mounted on one side of the top of the annular piston (498). The push-pull rod (499) slides through the heat-conducting sleeve (496) and is fixedly connected to the bottom of the resistance adjustment slider (4911).

8. A method for anti-swaying hoisting based on ductile iron jacking pipe molds, used in the anti-swaying hoisting device based on ductile iron jacking pipe molds as described in any one of claims 1-7, characterized in that: The method includes the following steps: Step 1: Securely attach the vacuum lifting device and the outer wall of the ductile iron jacking pipe mold using adsorption. Step 2: Connect the hook (48) and the vacuum lifting device. After the trial lifting is completed, the second motor (44) drives the winding shaft (45) to rotate synchronously and wind up the two steel wires (47). The hook (48) gradually lifts the vacuum lifting device upwards. At the same time, the power component drives the hoisting box (41) to move along the outer wall of the boom (3) until the ductile iron jacking pipe mold is hoisted to the designated position. Step 3: During the hoisting and movement of the ductile iron jacking mold, the first stabilizing component (49) and the second stabilizing component (410) gradually reduce the swaying force of the steel wire (47) by utilizing the principle that the current-carrying conductor is hindered in the movement of the magnetic field, so as to keep the ductile iron jacking mold being hoisted smoothly.

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