A precise positioning device and construction method for hoisting a vacuum induction furnace body into position

Abstract

The application discloses a kind of vacuum induction furnace body hoisting in place's precision positioning device and construction method, including positioning construction disc, the upper side of the positioning construction disc is equipped with main lifting ring, and main lifting ring is connected with hoisting machine tool by hook, the outside of the positioning construction disc is equipped with multiple groups of universal adjusting precision positioning mechanism, the universal adjusting precision positioning mechanism includes adjusting tube, and adjusting tube is inserted with inner cannula, the end of the inner cannula is fixed with ball seat, and the bottom of the ball seat is equipped with laser guide lamp.The vacuum induction furnace body hoisting in place's precision positioning device and construction method are adapted to different specifications vacuum induction furnace hoisting operation, and the installation position of lifting assembly A can be slightly adjusted in arc-shaped positioning adjusting channel, which is suitable for different distribution intervals of furnace body lifting lug, and improves the adaptation range of the whole hoisting device.

Description

Technical Field

[0001] This invention relates to the field of induction furnace hoisting equipment, specifically a precise positioning device and construction method for hoisting and positioning a vacuum induction furnace body. Background Technology

[0002] The core of the vacuum induction furnace (VIM) is the dual principle of vacuum sealed environment and medium frequency electromagnetic induction heating. It consists of three parts working together: heating and melting, vacuum refining, and electromagnetic stirring. When installing the vacuum induction furnace, steel wire ropes matched to the weight of the furnace body and bow-shaped shackles are used with a balance beam as lifting equipment. The shackles are inserted into the special load-bearing lugs symmetrically arranged on the furnace body and locked. The vertical angle of the slings is controlled to not exceed 45°, and the force is evenly distributed at four points. After a test lift off the ground to confirm that it is stable and has no uneven load, the whole lifting and transportation is completed.

[0003] Regarding patents related to vacuum induction furnace installation equipment, a search revealed Chinese patent CN204115472U, which discloses a furnace loading structure for a nickel and nickel-based alloy vacuum induction furnace. The patent includes a crucible, an induction coil wound around the crucible, and a tooling made of nickel for placing alloy raw materials into the crucible. The tooling includes a bottom disc adapted to the bottom of the crucible, a side plate fixedly connected to the bottom disc, and support rings provided at the upper, lower, and middle parts of the side plate. Four lifting lugs are fixedly provided on the upper support ring.

[0004] While the aforementioned devices can significantly improve production efficiency and save energy and materials, in actual use, especially with large vacuum furnaces, the entire furnace is suspended and lowered. Relying solely on manual visual alignment of the crucible and furnace cavity makes it difficult to accurately align the bottom of the furnace with the installation reference, easily leading to radial offset and tilting. This necessitates subsequent manual repositioning and repeated adjustments, adding extra time for correction and adjustment, and lengthening the production cycle. Summary of the Invention

[0005] The purpose of this invention is to provide a precise positioning device and construction method for hoisting and positioning a vacuum induction furnace body, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, a precise positioning device for hoisting and positioning a vacuum induction furnace body is provided, comprising a positioning construction plate, a main lifting ring installed on the upper side of the positioning construction plate, and the main lifting ring being connected to the hoisting equipment via a hook. Multiple sets of universal adjustment precise positioning mechanisms are provided on the outer side of the positioning construction plate. Each universal adjustment precise positioning mechanism includes an adjustment tube, and an inner insertion tube is inserted inside the adjustment tube. A ball seat is fixed at the end of the inner insertion tube, and a laser guide light is installed at the bottom of the ball seat.

[0007] Furthermore, the positioning construction plate has a ring structure, and multiple sets of positioning adjustment channels, perforations and splicing grooves are equidistantly provided on the positioning construction plate. The multiple sets of positioning adjustment channels, perforations and splicing grooves are equidistantly distributed along the circumference of the positioning construction plate.

[0008] Furthermore, the positioning adjustment channel has an arc-shaped structure, and a lifting component A is inserted into the positioning adjustment channel. Lifting components B are inserted into multiple sets of perforations, and an upper steel cable is fixed on the lifting component B. A lower steel cable is fixed on the lifting component A, and multiple sets of lower steel cables are connected to the lifting lugs on the induction furnace body through hooks.

[0009] Furthermore, the lifting assembly B and the lifting assembly A have the same structure. The lifting assembly A includes a fixing stud inserted in the positioning adjustment channel, and two sets of fixing nuts are screwed onto the fixing stud.

[0010] Furthermore, the two sets of fixing nuts are respectively set on both sides of the positioning and adjustment channel, the end of the fixing stud is fixed with an installation ring, and the installation ring is fixed to the lower steel cable, and the lifting assembly B is fixed to the upper steel cable through the installation ring on it.

[0011] Furthermore, the universal adjustment precision positioning mechanism includes a splicing seat adapted to the size of the splicing slot, and the splicing seat is inserted into the inside of the splicing slot. Both the splicing slot and the splicing seat have a dovetail-shaped structure, and the end of the splicing seat is welded to the adjustment tube.

[0012] Furthermore, the inner tube has a guide space, and a spring is fixed in the guide space. An adjusting column is movably connected in the guide space and is fixed to the spring. Multiple sets of adjusting holes are equidistantly opened on the adjusting tube, and adjusting columns are inserted into the adjusting holes. The depth of the inner tube inserted into the adjusting tube is adjusted and locked through the adjusting holes and adjusting columns.

[0013] Furthermore, the inner tube has an "L" shaped structure, and a ball seat is fixed at the end of the inner tube. A universal ball is movably connected inside the ball seat, and a locking stud is screwed onto the ball seat. The rotation angle of the universal ball inside the ball seat is locked by the locking stud. An assembly seat is fixed at the end of the universal ball, and a locking disc is fixed on the ball seat.

[0014] Furthermore, the bottom of the assembly base is fixed with multiple sets of sliding pins, and the bottom of the assembly base is provided with a quick-connect seat. Multiple sets of sliding grooves and locking grooves are equally spaced on the quick-connect seat. The sliding grooves and locking grooves are connected. The multiple sets of sliding pins are respectively inserted into the multiple sets of sliding grooves and screwed into the multiple sets of locking grooves. The cross-sections of the sliding pins and locking grooves are right-angled trapezoidal structures, and the cross-section of the sliding grooves is rectangular.

[0015] A precise positioning construction method for hoisting and placing a vacuum induction furnace body includes the following steps:

[0016] S1: Connect the hoisting equipment to the main lifting ring on the upper side of the positioning construction plate via hooks, select the corresponding number of universal adjustment precision positioning mechanisms, and insert the splicing seat into the dovetail splicing grooves that are equidistantly distributed around the circumference of the positioning construction plate to complete the pre-installation of the mechanism.

[0017] S2: Press the spring in the compression guide space of the adjustment column, pull out the L-shaped inner tube to the appropriate length, and then release the adjustment column so that the adjustment column is locked into the corresponding adjustment hole of the adjustment tube to lock the length. Slide the bottom of the assembly base along the quick-connect seat groove and rotate it into the locking groove to complete the laser guide light assembly. Rotate the universal ball in the ball seat to adjust the projection angle of the laser guide light, and tighten the locking stud to fix the universal ball.

[0018] S3: Insert lifting component A into the arc-shaped positioning adjustment channel of the positioning construction plate and lifting component B into the through hole. Screw on the fixing nuts on both sides of the fixing stud. Adjust the position of lifting component A inside the positioning adjustment channel according to the position of the furnace body lifting lug and clamp the positioning construction plate. Connect the lower steel cable hook connected to the installation ring of lifting component A to the lifting lug of the vacuum induction furnace body. Connect the upper steel cable to the installation ring of lifting component B for auxiliary bearing.

[0019] S4: Start the hoisting equipment to lift the main lifting ring, which will drive the positioning construction plate and the furnace body to be suspended in the air simultaneously. Relying on multiple sets of laser guide lights to project multiple beams onto the installation base, observe the furnace body's attitude in real time. When it is close to the base, adjust the position of the lifting component A in part of the positioning adjustment channel according to the furnace body's attitude to correct the radial offset and tilt of the furnace body. Slowly lower the furnace body to the base and after it fits, remove the lifting component A, lifting component B and universal adjustment precision positioning mechanism in sequence to complete the furnace body hoisting and positioning operation.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. This solution utilizes a ring-shaped positioning construction plate paired with multiple sets of universal adjustment precision positioning mechanisms equipped with laser guide lights. During the hoisting and lowering phase, the beams synchronously align with the installation benchmark, replacing the single method of manual visual alignment. This reduces radial offset and tilting when the furnace bottom is in contact with the installation benchmark, minimizes manual repositioning and correction steps after the furnace is in place, shortens overall construction and adjustment time, and reduces on-site installation production cycle. Simultaneously, the dovetail-shaped splicing groove and splicing seat allow for quick assembly and disassembly of the universal adjustment precision positioning mechanism, adapting to hoisting operations of vacuum induction furnaces of different specifications. The arc-shaped positioning adjustment channel allows for minor adjustments to the installation position of lifting component A, adapting to different distribution spacing of furnace body lifting lugs, thus expanding the adaptability of the entire hoisting device.

[0022] 2. This solution achieves adjustable guide mechanism length through the use of adjusting tubes, inner inserts, springs, and multiple sets of adjusting holes. The ball seat and universal ball, combined with locking studs, allow for free adjustment of the laser guide light's illumination direction. The right-angled trapezoidal sliding pin, sliding groove, and locking groove form a quick-release connection structure, facilitating rapid disassembly and replacement of the laser guide light assembly. Lifting assembly A and lifting assembly B have a unified structure, using fixing nuts at both ends to clamp the fixing studs, which can stably distribute the furnace body lifting load, reduce the stress load on single-point slings, reduce the amplitude of sling deviation and sway during lifting, further reduce the amount of correction work after the furnace body is in place, and improve the overall smoothness of the large vacuum furnace lifting construction. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 3 ;

[0026] Figure 4 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 10 ;

[0027] Figure 5 This is a side view of the present invention;

[0028] Figure 6 This is a schematic diagram of the universal adjustment and precision positioning mechanism of the present invention;

[0029] Figure 7 This is a partial structural diagram of the positioning construction plate of the present invention;

[0030] Figure 8 This is a schematic diagram of the adjusting column and its connection structure according to the present invention;

[0031] Figure 9 This is a schematic diagram of the ball seat and its connection structure of the present invention;

[0032] Figure 10 This is a schematic diagram of the assembly base, quick-connect base, and their connection structure of the present invention;

[0033] Figure 11 This is a schematic diagram of the connection structure of the running groove and locking groove of the present invention;

[0034] Figure 12 This is a schematic diagram of the sliding pin and its connection structure of the present invention.

[0035] The diagram is labeled as follows: 100, Positioning construction plate; 11, Positioning adjustment channel; 110, Perforation; 12, Splicing groove; 13, Lifting component A; 1301, Fixing nut; 1302, Fixing stud; 1303, Mounting ring; 131, Lower steel cable; 14, Lifting component B; 141, Upper steel cable; 200, Main lifting ring; 300, Universal adjustment precision positioning mechanism; 30, Splicing seat; 31, Adjusting tube; 311, Adjusting hole; 312, Adjusting column; 3121, Spring; 3122, Guide space; 32, Inner tube; 33, Ball seat; 331, Locking stud; 332, Universal ball; 34, Locking disc; 35, Assembly seat; 351, Carousel pin; 352, Carousel groove; 353, Locking groove; 36, Quick connector; 37, Laser guide light. Detailed Implementation

[0036] Please see Figure 1 - Figure 12 This invention provides a precise positioning device for hoisting and positioning a vacuum induction furnace body, including a positioning construction plate 100. A main lifting ring 200 is installed on the upper side of the positioning construction plate 100, and the main lifting ring 200 is connected to the hoisting equipment through a hook. Multiple sets of universal adjustment precise positioning mechanisms 300 are provided on the outer side of the positioning construction plate 100. The universal adjustment precise positioning mechanism 300 includes an adjustment tube 31, and an inner insertion tube 32 is inserted into the adjustment tube 31. A ball seat 33 is fixed at the end of the inner insertion tube 32, and a laser guide light 37 is installed at the bottom of the ball seat 33.

[0037] like Figure 1-6 As shown, the overall extension length of the mechanism can be flexibly adjusted by the adjusting tube 31, the inner insertion tube 32, the spring 3121, and multiple sets of adjusting holes 311 to adapt to the base distance corresponding to different sizes of furnace bodies. Furthermore, the projection direction of the laser guide lamp 37 can be flexibly adjusted by the ball seat 33, the universal ball 332, and the locking stud 331, allowing the multiple beams output by the laser guide lamps 37 to be evenly distributed across the furnace body mounting and positioning base. During operation, multiple beams can be simultaneously compared to the base positions, compensating for the limited range of single manual visual observation. This allows for simultaneous observation of the relative position of various parts of the furnace body relative to the base, facilitating simultaneous control of the overall furnace body posture during hoisting and lowering, and reducing the occurrence of unilateral displacement or tilting of the furnace body. Simultaneously, the adjustable length and illumination angle of the structure can adapt to the base positioning requirements of various sizes of large vacuum induction furnaces, improving the device's versatility.

[0038] The positioning construction plate 100 has a ring structure, and multiple sets of positioning adjustment channels 11, perforations 110 and splicing grooves 12 are equally spaced on the positioning construction plate 100. The multiple sets of positioning adjustment channels 11, perforations 110 and splicing grooves 12 are equally spaced along the circumference of the positioning construction plate 100.

[0039] The positioning adjustment channel 11 has an arc-shaped structure, and a lifting component A13 is inserted inside the positioning adjustment channel 11. Lifting components B14 are inserted into multiple sets of through holes 110, and an upper steel cable 141 is fixed on the lifting component B14. A lower steel cable 131 is fixed on the lifting component A13. Multiple sets of lower steel cables 131 are connected to the lifting lugs on the induction furnace body through hooks.

[0040] The lifting assembly B14 and the lifting assembly A13 have the same structure. The lifting assembly A13 includes a fixing stud 1302 inserted through the positioning adjustment channel 11, and two sets of fixing nuts 1301 are screwed onto the fixing stud 1302.

[0041] Two sets of fixing nuts 1301 are respectively set on both sides of the positioning and adjustment channel 11. The end of the fixing stud 1302 is fixed with an installation ring 1303, and the installation ring 1303 is fixed to the lower steel cable 131. The lifting assembly B14 is fixed to the upper steel cable 141 through the installation ring 1303 on it.

[0042] like Figure 2-12 As shown, the length of the guide mechanism is adjustable through the adjusting tube 31, the inner insertion tube 32, the spring 3121, and multiple sets of adjusting holes 311; the ball seat 33 and the universal ball 332, together with the locking stud 331, can freely change the illumination direction of the laser guide light 37. The right-angled trapezoidal sliding pin 351, the sliding groove 352, and the locking groove 353 form a quick-release connection structure, which facilitates the quick disassembly and replacement of the laser guide light 37 assembly. The lifting assembly A13 and the lifting assembly B14 have the same structure. By using the fixing nuts 1301 at both ends to clamp the fixing stud 1302, the load of the furnace body can be stably distributed, the stress load on the single-point sling can be reduced, the amplitude of sling deviation and sway during the lifting process can be reduced, the amount of correction work after the furnace body is in place can be further reduced, and the overall lifting construction of the large vacuum furnace can be improved.

[0043] The universal adjustment and precision positioning mechanism 300 includes a splicing seat 30 that is adapted to the size of the splicing slot 12, and the splicing seat 30 is inserted into the inside of the splicing slot 12. Both the splicing slot 12 and the splicing seat 30 have a dovetail structure, and the end of the splicing seat 30 is welded to the adjustment tube 31.

[0044] The inner tube 32 has a guide space 3122, and a spring 3121 is fixed in the guide space 3122. An adjusting column 312 is movably connected in the guide space 3122, and the adjusting column 312 is fixedly connected to the spring 3121. Multiple sets of adjusting holes 311 are equally spaced on the adjusting tube 31, and the adjusting column 312 passes through the adjusting hole 311. The depth of the inner tube 32 inserted into the adjusting tube 31 is adjusted and locked through the adjusting hole 311 and the adjusting column 312.

[0045] The inner tube 32 has an "L" shaped structure, and a ball seat 33 is fixed at the end of the inner tube 32. A universal ball 332 is movably connected inside the ball seat 33, and a locking stud 331 is screwed onto the ball seat 33. The rotation angle of the universal ball 332 inside the ball seat 33 is locked by the locking stud 331. A mounting base 35 is fixed at the end of the universal ball 332, and a locking disc 34 is fixed on the ball seat 33.

[0046] The bottom of the mounting base 35 is fixed with multiple sets of sliding pins 351. The bottom of the mounting base 35 is provided with a quick-connect seat 36, and multiple sets of sliding grooves 352 and locking grooves 353 are equally spaced on the quick-connect seat 36. The sliding grooves 352 and locking grooves 353 are connected. The multiple sets of sliding pins 351 are respectively inserted into the multiple sets of sliding grooves 352 and screwed into the multiple sets of locking grooves 353. The cross-sections of the sliding pins 351 and locking grooves 353 are right-angled trapezoidal structures, and the cross-section of the sliding grooves 352 is rectangular.

[0047] like Figure 1-6 As shown: By using the annular positioning construction plate 100 with multiple sets of universal adjustment precision positioning mechanisms 300 equipped with laser guide lights 37, the beam synchronously aligns with the installation benchmark during the hoisting and lowering stage, replacing the single manual visual alignment method. This reduces radial offset and tilting when the bottom of the furnace body is in contact with the installation benchmark, reduces the number of manual moving and correction steps after the furnace body is in place, shortens the overall construction and adjustment time, and compresses the on-site installation production cycle. At the same time, the dovetail splicing groove 12 and splicing seat 30 can be quickly disassembled and assembled with the universal adjustment precision positioning mechanism 300 to adapt to the hoisting operations of vacuum induction furnaces of different specifications. The arc-shaped positioning adjustment channel 11 can slightly adjust the installation position of the lifting component A13 to adapt to different distribution spacing of the furnace body lifting lugs, thereby improving the adaptability of the entire hoisting device.

[0048] Working principle: During hoisting operations, first connect the hoisting equipment hook to the main lifting ring 200 above the positioning construction plate 100. Then, using the dovetail-shaped splicing slots 12 evenly distributed around the circumference of the annular positioning construction plate 100, insert and match the dovetail-shaped splicing seats 30 to quickly assemble multiple sets of universal adjustment precision positioning mechanisms 300. Press the adjusting column 312, which retracts within the guide space 3122, compressing its internal spring 3121. At this point, the adjusting column 312 disengages from the adjusting hole 311. After pulling the L-shaped inner tube 32 to the appropriate length, release the adjusting column 312. The spring 3121 pushes the adjusting column 312 into the corresponding adjusting hole 311 on the outer wall of the adjusting tube 31, locking the insertion depth of the inner tube 32 and the adjusting tube 31. Then, rotate the universal ball 332 inside the ball seat 33 to adjust the illumination angle of the bottom laser guide light 37, and tighten the locking stud 331 on the ball seat 33 to fix the rotation range of the universal ball 332.

[0049] After the mounting base 35's bottom sliding pin 351 slides into the rectangular sliding groove 352 of the quick-connect seat 36, it rotates and engages with the connected right-angled trapezoidal locking groove 353, thus locking the quick-connect seat 36. The laser guide light 37 projects a beam to mark the installation reference position.

[0050] Lifting component A13 is inserted into the arc-shaped positioning adjustment channel 11 of the positioning construction plate 100, and lifting component B14 is inserted into the through hole 110. Two sets of fixing nuts 1301 are screwed onto both ends of the fixing stud 1302 to clamp the positioning construction plate 100, completing the fixing of lifting components A13 and B14. The lower steel cable 131 connected to the mounting ring 1303 on lifting component A13 is hooked to the lifting lug of the vacuum induction furnace body, and the upper steel cable 141 connected to the mounting ring 1303 on lifting component B14 is used for auxiliary force. The lifting equipment lifts the main lifting ring 200, causing the entire positioning construction plate 100 and the furnace body to be suspended synchronously. The installation point is referenced by the reference light projected by multiple sets of laser guide lights 37. The position of lifting component A13 within the arc-shaped positioning adjustment channel 11 can be finely adjusted, and the radial position and tilt of the furnace body can be corrected in real time by referring to the beam during the lowering of the furnace body. The furnace body is lowered into the installation area, completing the entire lifting and positioning operation.

[0051] A precise positioning construction method for hoisting and placing a vacuum induction furnace body includes the following steps:

[0052] S1: Connect the hoisting equipment to the main lifting ring 200 on the upper side of the positioning construction plate 100 via hooks, select the corresponding number of universal adjustment precision positioning mechanisms 300, and insert the splicing seat 30 into the dovetail splicing grooves 12 that are equidistantly distributed around the circumference of the positioning construction plate 100 to complete the pre-installation of the mechanism.

[0053] S2: Press the adjusting column 312 to compress the spring 3121 in the guide space 3122, pull out the L-shaped inner tube 32 to the appropriate length, and then release the adjusting column 312 so that the adjusting column 312 is locked into the corresponding adjusting hole 311 of the adjusting tube 31 to lock the length. Slide the bottom sliding pin 351 of the assembly seat 35 along the sliding groove 352 of the quick-connect seat 36 and rotate it into the locking groove 353 to complete the assembly of the laser guide light 37. Rotate the universal ball 332 in the ball seat 33 to adjust the projection angle of the laser guide light 37, and tighten the locking stud 331 to fix the universal ball 332.

[0054] S3: Insert lifting component A13 into the arc-shaped positioning adjustment channel 11 of the positioning construction plate 100 and lifting component B14 into the through hole 110. Screw on fixing nuts 1301 on both sides of the fixing stud 1302. Adjust the position of lifting component A13 inside the positioning adjustment channel 11 according to the position of the furnace body lifting lug and clamp the positioning construction plate 100. The hook of the lower steel cable 131 connected to the installation ring 1303 of lifting component A13 is connected to the lifting lug of the vacuum induction furnace body. The upper steel cable 141 is connected to the installation ring 1303 of lifting component B14 for auxiliary bearing.

[0055] S4: Start the hoisting equipment to lift the main lifting ring 200, which drives the positioning construction plate 100 to be suspended synchronously with the furnace body. Relying on the multi-point beams projected by multiple sets of laser guide lights 37 onto the installation base, observe the furnace body's posture in real time. When approaching the base, adjust the position of some of the lifting components A13 in the positioning adjustment channel 11 according to the furnace body's posture to correct the furnace body's radial offset and tilt. Loosen the lower fixing nut 1301 of one or two lifting components A13, move the position of the corresponding lifting component A13 so that the furnace body and the base are vertically aligned, and tighten the fixing nut 1301 at the position to clamp the positioning construction plate 100. Slowly lower the furnace body to fit the base, and then remove the lifting components A13, lifting components B14 and universal adjustment precision positioning mechanism 300 in sequence to complete the furnace body hoisting and positioning operation.

Claims

1. A precise positioning device for hoisting and positioning a vacuum induction furnace body, comprising a positioning work plate (100), characterized in that: The upper side of the positioning construction plate (100) is equipped with a main lifting ring (200), and the main lifting ring (200) is connected to the lifting equipment through a hook. The outer side of the positioning construction plate (100) is provided with multiple sets of universal adjustment precision positioning mechanisms (300). The universal adjustment precision positioning mechanism (300) includes an adjustment tube (31), and an inner insertion tube (32) is inserted inside the adjustment tube (31). A ball seat (33) is fixed at the end of the inner insertion tube (32), and a laser guide light (37) is installed at the bottom of the ball seat (33).

2. The precise positioning device for hoisting and positioning a vacuum induction furnace body according to claim 1, characterized in that: The positioning construction plate (100) has a ring structure, and multiple sets of positioning adjustment channels (11), perforations (110) and splicing grooves (12) are equidistantly provided on the positioning construction plate (100). The multiple sets of positioning adjustment channels (11), perforations (110) and splicing grooves (12) are equidistantly distributed along the circumference of the positioning construction plate (100).

3. The precise positioning device for hoisting and positioning a vacuum induction furnace body according to claim 2, characterized in that: The positioning adjustment channel (11) has an arc-shaped structure, and a lifting component A (13) is inserted in the positioning adjustment channel (11). Lifting components B (14) are inserted in multiple sets of perforations (110), and an upper steel cable (141) is fixed on the lifting component B (14). A lower steel cable (131) is fixed on the lifting component A (13). Multiple sets of lower steel cables (131) are connected to the lifting lugs on the induction furnace body through hooks.

4. The precise positioning device for hoisting and positioning a vacuum induction furnace body according to claim 3, characterized in that: The lifting assembly B (14) and the lifting assembly A (13) have the same structure. The lifting assembly A (13) includes a fixing stud (1302) inserted in the positioning adjustment channel (11), and two sets of fixing nuts (1301) are screwed on the fixing stud (1302).

5. The precise positioning device for hoisting and positioning a vacuum induction furnace body according to claim 4, characterized in that: The two sets of fixing nuts (1301) are respectively set on both sides of the positioning adjustment channel (11). The fixing stud (1302) has an installation ring (1303) fixed at its end, and the installation ring (1303) is fixed to the lower steel cable (131). The lifting assembly B (14) is fixed to the upper steel cable (141) through the installation ring (1303) on it.

6. The precise positioning device for hoisting and positioning a vacuum induction furnace body according to claim 2, characterized in that: The universal adjustment precision positioning mechanism (300) includes a splicing seat (30) that is adapted to the size of the splicing groove (12), and the splicing seat (30) is inserted into the inside of the splicing groove (12). Both the splicing groove (12) and the splicing seat (30) are dovetail-shaped structures, and the end of the splicing seat (30) is welded to the adjustment tube (31).

7. The precise positioning device for hoisting and positioning a vacuum induction furnace body according to claim 1, characterized in that: The inner tube (32) is provided with a guide space (3122), and a spring (3121) is fixed in the guide space (3122). An adjusting column (312) is movably connected in the guide space (3122), and the adjusting column (312) is fixedly connected to the spring (3121). Multiple sets of adjusting holes (311) are provided at equal intervals on the adjusting tube (31), and the adjusting column (312) is inserted into the adjusting hole (311). The depth of the inner tube (32) inserted into the adjusting tube (31) is adjusted and locked by the adjusting hole (311) and the adjusting column (312).

8. The precise positioning device for hoisting and positioning a vacuum induction furnace body according to claim 1, characterized in that: The inner tube (32) has an "L" shaped structure, and a ball seat (33) is fixed at the end of the inner tube (32). A universal ball (332) is movably connected inside the ball seat (33), and a locking stud (331) is screwed onto the ball seat (33). The rotation angle of the universal ball (332) inside the ball seat (33) is locked by the locking stud (331). A mounting base (35) is fixed at the end of the universal ball (332), and a locking disc (34) is fixed on the ball seat (33).

9. The precise positioning device for hoisting and positioning a vacuum induction furnace body according to claim 8, characterized in that: The bottom of the mounting base (35) is fixed with multiple sets of sliding pins (351). The bottom of the mounting base (35) is provided with a quick-connect seat (36), and multiple sets of sliding grooves (352) and locking grooves (353) are equally spaced on the quick-connect seat (36). The sliding grooves (352) and locking grooves (353) are connected. The multiple sets of sliding pins (351) are respectively inserted into the multiple sets of sliding grooves (352) and screwed into the multiple sets of locking grooves (353). The cross-sections of the sliding pins (351) and locking grooves (353) are right-angled trapezoidal structures, and the cross-section of the sliding grooves (352) is rectangular.

10. A precise positioning construction method for hoisting and positioning a vacuum induction furnace body, comprising using a precise positioning device for hoisting and positioning a vacuum induction furnace body as described in any one of claims 1 to 9, characterized in that: Includes the following steps: S1: Connect the hoisting equipment to the main lifting ring (200) on the upper side of the positioning construction plate (100) via hooks, select the corresponding number of universal adjustment precision positioning mechanisms (300), and insert the splicing seat (30) into the dovetail splicing groove (12) that is evenly distributed around the circumference of the positioning construction plate (100) to complete the pre-installation of the mechanism. S2: Press the adjusting column (312) to compress the spring (3121) in the guide space (3122), pull out the L-shaped inner tube (32) to the appropriate length and then release the adjusting column (312) so that the adjusting column (312) is locked into the corresponding adjusting hole (311) of the adjusting tube (31) to lock the length. Slide the bottom sliding pin (351) of the assembly base (35) along the sliding groove (352) of the quick connector (36) and rotate it into the locking groove (353) to complete the assembly of the laser guide light (37). Rotate the universal ball (332) in the ball seat (33) to adjust the projection angle of the laser guide light (37). Tighten the locking stud (331) to fix the universal ball (332). S3: Insert the lifting assembly A (13) into the arc-shaped positioning adjustment channel (11) of the positioning construction plate (100), and insert the lifting assembly B (14) into the through hole (110). Screw the fixing nuts (1301) on both sides of the fixing stud (1302). Adjust the position of the lifting assembly A (13) in the positioning adjustment channel (11) according to the position of the furnace body lifting lugs and clamp the positioning construction plate (100). The lower steel cable (131) connected to the installation ring (1303) of the lifting assembly A (13) is hooked to the vacuum induction furnace body lifting lug. The upper steel cable (141) connected to the installation ring (1303) of the lifting assembly B (14) is used for auxiliary bearing. S4: Start the hoisting equipment to lift the main lifting ring (200) and drive the positioning construction plate (100) to be suspended in the air synchronously with the furnace body. Relying on the multi-point beams projected by multiple sets of laser guide lights (37) onto the installation base, observe the furnace body posture in real time. When approaching the base position, adjust the position of the lifting component A (13) in part of the positioning adjustment channel (11) according to the furnace body posture to correct the radial offset and tilt of the furnace body. Slowly lower the furnace body to the base and after it fits, remove the lifting component A (13), lifting component B (14) and universal adjustment precision positioning mechanism (300) in sequence to complete the furnace body hoisting and positioning operation.

Images