Center suspender anti-falling device of wheel stacking excircle lifting appliance

Abstract

The utility model discloses a central lifting rod anti-falling device of a wheel stacking excircle lifting appliance. The central lifting rod anti-falling device comprises a lifting ring, an anti-unhooking door frame, a lifting rod seat, a retractable lifting hook, a central lifting rod and a lifting hook, the upper ends of the lifting ring and the retractable lifting hook are movably arranged at the upper and lower ends of the suspender seat respectively; the suspender seat is vertically provided with a through hole and sleeves the outer side of the central suspender; the upper end of the central suspender is provided with an external thread, and the lower part of the rod body is sequentially sleeved with a conical sleeve, a slip ring and a transverse framework, and the lower end is provided with a cylinder through a bottom nut; the lower end of the retractable hook is movably connected with the bottom of the conical sleeve; the top of the mousing-hook door frame is fixedly welded to the top end of the center hanging rod, and the two sides of the mousing-hook door frame are fixedly welded to the fixing nuts respectively. The transverse framework is in a trifurcate shape, three outer ends of the transverse framework are movably connected with lifting hooks respectively, and the bottom end of each lifting hook is movably connected with a clamping plate respectively; and pull rods are movably arranged between the outer side of the cylinder and the three lifting hooks respectively. According to the utility model, the problem that the center lifting rod of the existing large wheel stacking excircle lifting appliance falls off can be effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to welding technical field, concretely relates to a center derrick of wheel stack outer circle lifting appliance anti -drop device. BACKGROUND

[0002] At present, the main core process flow of track wheel production is: qualified ingot - machine tool processing cutting - heating furnace heating - oil press rolling - cold bed conveying - stack hoisting and slow cooling - heat treatment quenching - rough machining - finishing - shot blasting detection - manual flaw detection - paint spraying and packaging - delivery for use. In the core link of wheel stacking (stacked wheels are generally 5-6 single piece wheels stacked) hoisting, various specifications of stacked wheels are hoisted into the various processes of wheel production in the workshop by the outer circle lifting appliance.

[0003] Chinese patent CN2490131Y discloses a wheel stack hoisting device for wheel production and transportation. The wheel stack hoisting device comprises a lifting ring, a lifting rod, a lifting rod seat, a hook, a conical sleeve, a sliding ring, a cross frame, a lifting hook, a pull rod and a clamping plate. The lifting ring and the hook are fixed on the upper and lower ends of the lifting rod seat respectively and can move. The lifting rod is inserted into the lifting rod seat from the upper end and passes through the conical sleeve with a cylinder at the lower end. The head of the lifting rod is clamped at the lower end of the lifting rod seat. The sliding ring is inserted into the cylinder of the conical sleeve from the lower end. One end of the cross frame is fixed on the cylinder of the conical sleeve below the sliding ring, and the other end of the cross frame is fixed with the lifting hook by a bolt. The clamping plate is fixed on the lifting hook. One end of the pull rod is fixed on the end of the lifting rod by a bolt, and the other end of the pull rod is fixed on the lifting hook by a bolt. The above-mentioned wheel stack hoisting device has the advantages of simple and durable structure, convenient operation, flexible hoisting of stacked wheels and no location limitation, and is a good tool for wheel production and transportation. However, the center lifting rod of the large wheel stack outer circle lifting appliance is not only a key connecting spare part of the overall lifting appliance structure, but also frequently bears the weight of the body and the stacked wheels and the pulling force for hoisting. In the original design of the center lifting rod of the large lifting appliance, the upper part of the center lifting rod is fixed and installed in the lower part of the lifting rod seat (1 / 3 of the total length) by precise cooperation of the full thread and the threaded hole through mechanical processing. The lower part of the center rod is mainly connected with the retractable hook, the conical sleeve, the sliding ring, the cross frame and the pull rod and is fixed by the bottom nut at the lower end of the center rod. When hoisting normally, the center rod can meet the bearing and use of various stacked wheels. However, when the large lifting appliance is hoisted under full load due to improper operation of the operator, etc., and the stacked wheels are frequently impacted and restored by the large lifting appliance, and the large lifting appliance is raised and lowered in daily work, the threaded hole of the fixed connection between the upper part of the center lifting rod and the lower part of the lifting rod seat is directly affected by wear and tear. With the passage of time, the threaded connection of the center lifting rod of the large lifting appliance is seriously worn, which causes the key connecting spare part of the center lifting rod of the large wheel stack outer circle lifting appliance to fall off at any time, affects the production rhythm of the wheel process, and causes safety hazards of the equipment. CONTENT OF THE UTILITY MODEL

[0004] The utility model provides a center derrick of wheel pile outer circle lifting appliance anti -drop device, effectively solve the problem that the present large wheel pile outer circle lifting appliance center derrick drops and influences production and causes equipment safety hidden danger.

[0005] The technical scheme for solving the technical problems of the utility model is as follows:

[0006] According to one aspect of the utility model, a center derrick of wheel pile outer circle lifting appliance anti -drop device is provided, it includes the ring, anti -drop hook gantry, fixed nut, derrick seat, collect Zhang lifting hook, center derrick, conical cover, slip ring, horizontal frame, pull rod, lifting hook and clamping plate, the ring and collect Zhang lifting hook upper end are respectively movably arranged in the upper and lower ends of derrick seat, the derrick seat is vertically provided with through -hole and is set on the outside of center derrick, the upper end of center derrick is provided with external thread, the lower part of its pole body is sequentially set with conical cover, slip ring and horizontal frame, and its lower end is provided with a cylinder through bottom nut, the lower end of collect Zhang lifting hook is movably connected with the bottom of conical cover, the external thread is installed with fixed nut, the top of anti -drop hook gantry is welded with the top end of center derrick and is fixed, and both sides are welded with fixed nut and are fixed, the horizontal frame is trident -shaped, and the three outer ends are movably connected with lifting hook, and the bottom of each lifting hook is movably connected with clamping plate, and the cylinder outside and three lifting hooks are movably provided with pull rod.

[0007] Further, the anti -drop hook gantry is machined from 16Mn steel plate with a thickness of 30mm.

[0008] According to another aspect of the utility model, a center derrick of wheel pile outer circle lifting appliance anti -drop method is provided, which is carried out by using the center derrick anti -drop device in the above technical scheme, and the steps are as follows:

[0009] S1, assembly of center derrick anti -drop device:

[0010] 1.1), the ring and multiple collect Zhang lifting hooks are rotatably installed on the upper end and the lower end of the derrick seat, the upper part of the center derrick penetrates the vertical through -hole of the derrick seat, the fixed nut is installed on the external thread at the top of the center derrick and makes the lower surface of the fixed nut horizontally contact the upper surface of the derrick seat, the conical cover, the slip ring and the horizontal frame are sequentially set on the lower part of the center derrick, the lower end of each collect Zhang lifting hook is rotatably connected with the bottom of the conical cover, the lifting hook is rotatably installed on the three outer ends of the horizontal frame, and the clamping plate is rotatably installed on the bottom of each lifting hook, one end of each pull rod is rotatably connected with the cylinder, and the other end is rotatably connected with the upper part of the corresponding lifting hook.

[0011] 1.2), make the anti-unhooking portal according to the fixed nut specification and the length of the center hanger extending from the hanger seat, open a bevel on both sides of the lower surface of the top of the anti-unhooking portal corresponding to the center hanger, open a bevel on both sides of the inner surface of both sides of the anti-unhooking portal corresponding to the fixed nut, set the anti-unhooking portal on both sides of the fixed nut, so that the center hanger and the bevels on both sides of the lower surface of the top of the anti-unhooking portal form horizontal butt K-shaped bevels, and the bevels on both sides of the inner surface of both sides of the anti-unhooking portal form butt K-shaped bevels on both sides of the door legs corresponding to the surfaces of the fixed nut;

[0012] S2, preparation before welding:

[0013] 2.1), welding equipment: CMT cold welding system;

[0014] 2.2), welding material: ER50-6 welding wire, φ1.2mm;

[0015] 2.3), groove size: double-sided K groove;

[0016] 2.4), welding material: dissimilar metals Q345 and 45#;

[0017] 2.5), welding position: flat surfacing;

[0018] 2.6), auxiliary facilities: template, magnifying glass, mask, gloves, slag cleaning hammer, hammer, chisel, file, steel wire brush, sandpaper, steel ruler, level, spanner, straight grinder, angular grinder, steel wire pliers, steel saw blade, labor protection articles;

[0019] 2.7), pre-welding cleaning: acetone, sandpaper is used to remove rust, grease and moisture on the welding groove and welding wire surface;

[0020] 2.8), welding requirement: the surfacing layer meets the requirements of pressure and tensile strength;

[0021] 2.9), welding technical requirement: the weld surfacing layer is fused with the base material, the weld has no any welding defects and meets the design size;

[0022] 2.10), assembly and tack welding: assemble without gap, tack weld up, down, left and right, use ER50-6 welding wire for positioning welding, the length of the positioning weld is 20-30mm;

[0023] 2.11), welding process parameters: determine the welding parameters according to the welding equipment, welding material and welding requirements;

[0024] S3, welding implementation;

[0025] 3.1), first on the installed anti-unhooking gantry beam horizontal butt K groove and door leg both sides of the butt K groove contact part, including with the hook on the upper surface of the contact said anti-unhooking gantry bottom all fixed spot welding;

[0026] 3.2), when welding, the whole spreader is placed horizontally, then the bottom layer welding is carried out on any one side of the horizontal butt K groove and the door leg both sides of the butt K groove, when welding the horizontal butt K groove, the top of the center hoist is slightly heated to 40 DEG C by using oxygen-acetylene flame, then the welding is carried out by using small crescent wire feeding method, after the bottom layer welding of the K groove is completed, the visual inspection or 5 times magnifying glass is used to detect and confirm that there is no defect, then the whole large spreader is turned over by 180 DEG, the bottom layer welding of the K groove on the other side is carried out in the same way, after the bottom layer welding is completed, the whole large spreader is turned over by 180 DEG, the filling welding of the K groove on one side is carried out, the wire feeding method is equilateral triangle, after the welding is completed, the visual inspection or 5 times magnifying glass is used to detect and confirm that there is no defect, then the whole large spreader is turned over by 180 DEG, the filling welding of the K groove on the other side is carried out, after the filling layer welding is completed, the whole large spreader is turned over by 180 DEG, the cap layer welding of the K groove on one side is carried out, after the cap layer welding of the K groove on one side is completed, the whole large spreader is turned over by 180 DEG, the cap layer welding of the K groove on the other side is carried out, after the cap layer welding is completed, the whole large spreader is turned over by 180 DEG, the welding seam surface is polished by using the hand angle grinder, the welding seam is ensured to be smooth transition, then the whole large spreader is turned over by 180 DEG, the welding seam surface on the other side is polished by using the same method;

[0027] 3.4), after the welding is completed, the welding seam is cooled to room temperature, then the flaw detection is carried out, when the bottom layer welding is carried out, the welding current is 180-220 A, the arc voltage is 25+ / -1 V, the welding speed is 25+ / -1 cm / min -1 ; when the filling layer and the cap layer are welded, the welding current is 220-280 A, the arc voltage is 26+ / -1 V, the welding speed is 25+ / -1 cm / min -1 .

[0028] Compared with the prior art, the center hoist anti-falling device of the wheel pile outer circle spreader provided by the utility model improves the original spreader, under the condition that the structure of the large spreader and the use in the hoisting process are not affected, the center hoist is fixed by using the fixed nut and the anti-unhooking gantry, the center hoist is effectively prevented from falling, the device is safe and easy to operate, the investment cost is low, the actual needs of the site are met, the work efficiency is high, the maintenance cost is greatly reduced, and the device provides guarantee for the hoisting of wheels of various specifications. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1The structure schematic view of the simple welding device is applied to the utility model.

[0030] Figure 2 The structure schematic view of the simple welding device is applied to the utility model.

[0031] Figure 3 The structure schematic view of the oxygen lance water cooling box in the utility model is applied to the utility model.

[0032] In the drawing: 1, lifting ring; 2, anti-unhooking portal frame; 3, fixed nut; 4, external thread; 5, lifting rod base; 6, folding lifting hook; 7, center lifting rod; 8, conical sleeve; 9, slip ring; 10, cross frame; 11, pull rod; 12, lifting hook; 13, clamping plate; 14, cylinder; 15, bottom nut; 2A, horizontal butt joint K-shaped groove of cross beam; 2B, butt joint K-shaped groove on both sides of door leg. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the utility model. Unless otherwise defined, the technical terms or scientific terms used herein should be understood as the usual meaning by those skilled in the art. The "up", "down", "left", "right", "front", "back" and the like used in the patent application description and claims of the utility model are only used to express the relative positional relationship, when the absolute position of the described object is changed, the relative positional relationship is also changed accordingly; "connection" or "connected" and the like similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. The utility model does not detail, all are the known technology of the technical personnel in the technical field.

[0034] Embodiment 1:

[0035] As Figures 1-3As shown, the utility model provides a kind of center derrick of wheel pile outer circle lifting appliance prevents falling device, it includes lifting ring 1, prevent unhooking gantry 2, fixed nut 3, derrick seat 5, retractable lifting hook 6, center derrick 7, conical sleeve 8, slip ring 9, cross frame 10, pull rod 11, lifting hook 12 and clamping plate 13;Lifting ring 1 and retractable lifting hook 6 upper end are respectively movably arranged in the upper and lower ends of derrick seat 5;Derrick seat 5 is vertically provided with through hole and is set on the outside of center derrick 7;Center derrick 7 upper end is provided with outer thread 4, its rod body lower part is successively set conical sleeve 8, slip ring 9 and cross frame 10, and its lower end is provided with cylinder 14 by bottom nut 15,;Retractable lifting hook 6 lower end is movably connected with the bottom of conical sleeve 8;Fixed nut 3 is installed on outer thread 4, prevent unhooking gantry 2 top and center derrick 7 top are welded fixed, two sides are welded fixed with fixed nut 3 respectively;Cross frame 10 is trident-shaped, and three outer ends are movably connected with lifting hook 12, and the bottom of each lifting hook 12 is movably connected with clamping plate 13;Cylinder 14 outside and three lifting hooks 12 between are movably provided with pull rod 11.

[0036] The center derrick of the wheel pile outer circle lifting appliance prevents falling device above is the improvement of the wheel pile lifting disclosed in Chinese patent CN2490131Y, that is, the lower part center derrick 7 of the original derrick seat 5 and each component installed on the center derrick 7 remain unchanged, the original derrick seat 5 is mechanically penetrated from top to bottom, the original center derrick 7 is lengthened and outer thread 4 is processed on the top, and fixed nut 3 of appropriate size is mechanically processed and matched, which meets the assembly size and process strength requirements, prevent unhooking gantry 2 is made according to the specifications of fixed nut 3 and the length of center derrick 7 extending from derrick seat 5, and beveling is opened at the corresponding position and welded fixed on the top of center derrick 7 and both sides of fixed nut 3, which effectively prevents the center derrick 7 from falling off without affecting the use during hoisting.

[0037] As a preferred embodiment, prevent unhooking gantry 2 is machined from 16Mn steel plate with a thickness of 30mm.

[0038] Example 2:

[0039] The utility model provides a kind of center derrick of wheel pile outer circle lifting appliance prevents falling method, using the center derrick of example 1 prevents falling device, and its steps are as follows:

[0040] S1, the assembly of center derrick prevents falling device:

[0041] 1.1, the upper end and the lower end of the hanger seat 5 are rotatably installed with the lifting ring 1 and the plurality of collecting hooks 6, the upper part of the center hanger 7 penetrates the vertical through hole of the hanger seat 5, the outer thread 4 at the top of the center hanger 7 is installed with the fixed nut 3, and the lower surface of the fixed nut 3 is horizontally contacted with the upper surface of the hanger seat 5, the lower part of the center hanger 7 is sequentially sleeved with the conical sleeve 8, the slip ring 9 and the cross frame 10, the lower end of each collecting hook 6 is rotatably connected with the bottom of the conical sleeve 8, the three outer ends of the cross frame 10 are rotatably installed with the hooks 12 respectively, and the bottom end of each hook 12 is installed with the clamping plate 13 respectively, one end of the three pull rods 11 is rotatably connected with the cylinder 14 respectively, and the other end is rotatably connected with the upper part of the corresponding hook 12 respectively;

[0042] 1.2, the anti-unhooking gantry 2 is made according to the specifications of the fixed nut 3 and the length of the center hanger 7 extending out of the hanger seat 5, the bevels are respectively formed on the corresponding positions of the center hanger 7 on both sides of the lower surface of the top of the anti-unhooking gantry 2, the bevels are respectively formed on the corresponding positions of the fixed nut 3 on both sides of the inner surface of the anti-unhooking gantry 2, the anti-unhooking gantry 2 is arranged on both sides of the fixed nut 3, the center hanger 7 and the bevels on both sides of the lower surface of the top of the anti-unhooking gantry 2 form horizontal butt joint K-shaped bevels 2A, and the bevels on both sides of the inner surface of the anti-unhooking gantry 2 and the surfaces on both sides of the fixed nut 3 respectively form door leg butt joint K-shaped bevels 2B;

[0043] S2, preparation before welding:

[0044] 2.1, welding equipment: CMT cold welding system;

[0045] 2.2, welding material: ER50-6 welding wire, φ1.2mm;

[0046] 2.3, groove size: double-sided K groove;

[0047] 2.4, welding material: dissimilar metals Q345 (anti-unhooking gantry 2) and 45# (center hanger 7);

[0048] 2.5, welding position: flat surfacing;

[0049] 2.6, auxiliary facilities: template, magnifying glass, mask, gloves, slag cleaning hammer, hammer, chisel, file, steel wire brush, sandpaper, steel ruler, level, spanner, straight grinder, angular grinder, steel wire pliers, steel saw blade, labor protection articles;

[0050] 2.7, cleaning before welding: acetone, sandpaper is used to remove rust, grease and moisture on the welding groove and the surface of the welding wire;

[0051] 2.8, welding requirement: the surfacing layer meets the requirements of compression and tensile strength;

[0052] 2.9, welding technical requirements: weld bead fusion base material, weld without any welding defects and meet the design size;

[0053] 2.10, assembly and point solid: assembly without gap up and down and left and right point solid, using ER50-6 welding wire for positioning welding, the length of the positioning weld is 20~30mm;

[0054] 2.11, welding process parameters: according to the welding equipment, welding material and welding requirements to develop welding parameters;

[0055] Welding wire model Welding layer Welding wire diameter / mm Welding current A Arc voltage / v Welding speed / (cm min -1 ​ ER50-6 Base layer 1.2 180-220 25±1 25±1 ER50-6 Filler cap layer 1.2 220-280 26±1 25±1

[0056] S3, welding implementation;

[0057] 3.1, considering the core key spare center boom 7 and boom seat 5 on the large lifting appliance, prevent a large amount of welding heat input to cause the local or overall deformation of the lifting appliance, directly affect the normal use of the lifting appliance even have the phenomenon of scrap, so the special cold welding equipment (CMT) is used to carry out the symmetrical K-shaped groove welding of the horizontal butt joint K-shaped groove 2A around the center boom 7 and the boom seat 5 and the fixed nut 3 and the butt joint K-shaped groove 2B on both sides of the door leg; first, the contact part of the horizontal butt joint K-shaped groove 2A and the butt joint K-shaped groove 2B on both sides of the door leg on the installed anti-unhooking door frame 2, including all fixed spot welding of the bottom of the anti-unhooking door frame 2 contacting the upper surface of the boom seat 5;

[0058] 3.2, when normal welding, the whole sling is placed horizontally, then the bottom layer welding is carried out on any side of the horizontal butt K groove 2A and the horizontal butt K groove 2B on both sides of the door leg, because the center hanger 7 is 45# medium carbon steel, when welding the horizontal butt K groove 2A, the top of the center hanger 7 is slightly heated to 40℃ by oxygen-acetylene flame, then the small crescent wire feeding method is used for welding, after the bottom layer welding of the K groove on the side is completed, the visual inspection or 5 times magnifying glass is used to confirm that there is no defect, then the whole large sling is turned over by 180°, the bottom layer welding of the K groove on the other side is carried out in the same way; after the bottom layer welding is completed, the whole large sling is turned over by 180°, the filling welding of each welding layer of the K groove on one side is carried out, the wire feeding method is equilateral triangle, after the welding is completed, the visual inspection or 5 times magnifying glass is used to confirm that there is no defect, then the whole large sling is turned over by 180°, the filling welding of each welding layer of the K groove on the other side is carried out; after the filling layer welding is completed, the whole large sling is turned over by 180°, the cap layer welding of the K groove on one side is carried out, after the cap layer welding of the K groove on the side is completed, the whole large sling is turned over by 180°, the cap layer welding of the K groove on the other side is carried out; after the cap layer welding is completed, the whole large sling is turned over by 180°, the weld surface is polished by hand angle grinder, to ensure smooth transition of the weld, then the whole large sling is turned over by 180°, the same method is used to polish the weld surface on the other side;

[0059] 3.4, after all the welding is completed, the weld is cooled to room temperature, then the detection is carried out, then the paint is sprayed and delivered for use.

Claims

1. A center hoist rod anti-falling device of a wheel stack external circle hoist, characterized in that, It includes the lifting ring (1), the anti-unhooking portal (2), the fixed nut (3), the lifting rod seat (5), the retractable lifting hook (6), the central lifting rod (7), the conical sleeve (8), the slip ring (9), the cross frame (10), the pull rod (11), the lifting hook (12) and the clamping plate (13); the upper ends of the lifting ring (1) and the retractable lifting hook (6) are movably arranged on the upper and lower ends of the lifting rod seat (5) respectively; the lifting rod seat (5) is vertically provided with a through hole and is sleeved on the outer side of the central lifting rod (7); the upper end of the central lifting rod (7) is provided with an external thread (4), the lower part of the rod body is sequentially sleeved with the conical sleeve (8), the slip ring (9) and the cross frame (10), and the lower end is provided with a cylinder (14) through a bottom nut (15); the lower end of the retractable lifting hook (6) is movably connected with the bottom of the conical sleeve (8); the external thread (4) is installed with the fixed nut (3), the top of the anti-unhooking portal (2) is welded and fixed with the top end of the central lifting rod (7), and the two sides are welded and fixed with the fixed nut (3) respectively; the cross frame (10) is trident-shaped, and the three outer ends are movably connected with the lifting hook (12) respectively, and the bottom end of each lifting hook (12) is movably connected with the clamping plate (13); the cylinder (14) is movably provided with the pull rod (11) between the outer side and the three lifting hooks (12) respectively.

2. The center hoist rod anti-falling device of the wheel stack external circle hoist according to claim 1, characterized in that, The anti-unhooking portal (2) is machined from a 16Mn steel plate with a thickness of 30mm.

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