Novel lifting appliance for galvanization pickling process

Abstract

The invention relates to the technical field of lifting devices, in particular to a novel lifting appliance for a galvanization pickling process, which comprises a main lifting beam and two first lifting mechanisms, the main lifting beam comprises an upper beam and a lower beam, and two second lifting mechanisms are respectively arranged at the bottom of the lower beam; the first lifting mechanism and the second lifting mechanism respectively comprise retractable lifting belts, the second lifting mechanism further comprises second cross beams, and the inner side of the bottom wall of one second cross beam protrudes upwards to form a lifting part; the design of the first hoisting mechanism and the second hoisting mechanism is adopted, when the hoisting belt of the first hoisting mechanism hoists the metal flat pipe into the air from a pickling solution, the hoisting belt of the second hoisting mechanism and the hoisting belt of the first hoisting mechanism exchange with each other, and in the exchange process, due to the fact that a second cross beam is provided with a lifting part in a protruding mode, the metal flat pipe can be lifted out of the pickling solution. And the metal flat pipe is inclined, so that the liquid on the inner side of the metal flat pipe can flow out conveniently, and the influence of the residual pickling solution in the metal flat pipe on the liquid in the plating assisting liquid tank is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of hoisting devices, and specifically, it is a new type of sling for the galvanizing pickling process. Background Art

[0002] During the manufacturing, storage or transportation of metal flat tubes, iron oxide scales and oil stains will form on the surface. These oxides and oil stains will hinder the bonding between zinc and the metal surface, affecting the quality of the galvanized layer. To ensure the firm bonding between the galvanized layer and the surface of the metal flat tube, it is necessary to pickle the metal flat tube to remove the iron oxide scales and oil stains.

[0003] A Chinese patent with the publication number CN114671337B discloses a sling, which includes a base, a clamping arm and a hoisting driving part. The base has a movable channel extending in the up-down direction; the sling provided by this invention is convenient to operate and saves manpower when hoisting hole-type workpieces.

[0004] A Chinese patent with the publication number CN113562583B discloses a sling, which includes a fixing part and a bearing part intersecting with the fixing part. By setting a plurality of convex parts in either the first component or the second component, and setting a plurality of concave parts in the other of the first component and the second component that are mutually engaged with any convex part, the second component can be moved relative to the first component, so that the center of gravity of a variety of hoisted target objects can be adjusted, improving the versatility of the sling.

[0005] In the above-mentioned and similar prior arts, in the galvanizing pickling process flow, the hoisting of materials is a key link. Traditional slings have many deficiencies. For example, the hoisting stability is poor, and manual intervention is required for hoisting, unloading, and sling exchange. If the sling is not exchanged in the process, the sling after pickling may remain acidic substances such as hydrochloric acid, and directly entering the flux solution will cause its pH value to be unbalanced, destroying the chemical stability of the flux solution, and easily causing the iron ions in the sling to excessively consume the zinc ions in the flux solution. This will not only result in too high galvanizing costs, but also cause the acidic residues to react with the components in the flux solution, such as generating hydrogen chloride gas or precipitates, reducing the pickling effect, leading to low production efficiency, and even clogging the circulation system of the pickling tank.

[0006] Therefore, the present invention provides a new type of sling for the galvanizing pickling process that can exchange the sling during the process of transporting objects. Summary of the Invention

[0007] Aiming at the problems in the prior art that the sling in the galvanizing pickling process flow is not exchanged during hoisting, which easily causes acidic substances such as residual hydrochloric acid in the sling to enter the flux solution and cause impacts, etc., a new type of sling for the galvanizing pickling process is designed.

[0008] The technical solution adopted by the present invention to solve its technical problems is: a novel lifting tool for a galvanized pickling process, including a main lifting beam and two first lifting mechanisms. The main lifting beam includes an upper beam and a lower beam, and two second lifting mechanisms are respectively arranged at the bottom of the lower beam; the first lifting mechanism and the second lifting mechanism respectively include retractable sling belts. When the sling belts of the first lifting mechanism lift the stacked metal flat tubes in the pickling tank, the sling belts of the second lifting mechanism and the sling belts of the first rope winding assembly are alternately exchanged in the air; the second lifting mechanism further includes a second cross beam, and the inner side of the bottom wall of one of the second cross beams bulges upward to form a lifting part. When the sling belts are alternately exchanged, one end of the metal flat tube located at the lifting part is higher than the other end, and the metal flat tube is in an inclined state.

[0009] Further, two lifting wheels are rotatably installed at the top of the upper beam through brackets, and driving members are respectively fixedly installed at the bottoms of the upper beam and the lower beam. Two screw rods are respectively fixedly installed at the two output ends of the driving members.

[0010] Further, the two screw rods at the bottom of the upper beam are respectively threadedly connected to the two first lifting mechanisms to drive the two first lifting mechanisms to slide relatively.

[0011] Further, the two screw rods at the bottom of the lower beam are respectively threadedly connected to the two second lifting mechanisms to drive the two second lifting mechanisms to slide relatively.

[0012] Further, the first lifting mechanism further includes an upper sliding frame, which is threadedly slidably installed at the bottom of the upper beam. A first cross beam is fixedly installed at the bottom of the upper sliding frame. Two first lower sliding frames are arranged on the outer side of the first cross beam. A driving member and a screw rod are arranged at the bottom of the first cross beam to drive the two first lower sliding frames to slide relatively. A first rope winding assembly is fixedly installed at the bottom of one of the first lower sliding frames. The first rope winding assembly is used for retracting and releasing the sling belt. One end of the sling belt away from the first rope winding assembly is rotatably connected to the bottom of the other first lower sliding frame.

[0013] Further, two lower sliding frames are slidably installed at the bottom of the second cross beam with a lifting part protruding. Two limiting sliding grooves are penetrated inside the lower sliding frames. Two threaded plates are threadedly driven by a driving member and a screw rod at the bottom of the second cross beam. Support rods are respectively fixedly installed on both sides of the threaded plates. Limiting sliding blocks are rotatably installed on the outer sides of the support rods through bearings, and the limiting sliding blocks are located inside the limiting sliding grooves.

[0014] Further, two second lower sliding frames are threadedly driven by a driving member and a screw rod at the bottom of the other second cross beam to slide relatively.

[0015] Further, second rope winding assemblies are respectively arranged at the bottoms of the lower sliding frames and the second lower sliding frames.

[0016] Advantages of the present invention:

[0017] A novel sling for a galvanized pickling process according to the present invention adopts the design of a first lifting mechanism and a second lifting mechanism. After the sling of the first lifting mechanism lifts the metal flat tube from the pickling solution into the air, the sling of the second lifting mechanism exchanges with the sling of the first lifting mechanism, and the sling of the second lifting mechanism is used to put the metal flat tube into the galvanizing assistant liquid pool, so that the sling in the first lifting mechanism only contacts the liquid in the pickling pool, while the sling in the second lifting mechanism only contacts the liquid in the galvanizing assistant pool, reducing the mutual interference between the two liquids. And during the process of sling exchange, since a second cross beam in the second lifting mechanism protrudes with a lifting part, the metal flat tube is in an inclined state, which facilitates the smooth outflow of the liquid inside the metal flat tube, reduces the pickling solution inside the metal flat tube from entering the galvanizing assistant liquid pool, and reduces the influence of the residual pickling solution in the metal flat tube on the liquid in the galvanizing assistant pool. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the drawings and embodiments.

[0019] Figure 1 is a three-dimensional structural schematic diagram of the sling of the present invention;

[0020] Figure 2 is a bottom three-dimensional structural schematic diagram of the sling of the present invention;

[0021] Figure 3 is a three-dimensional structural schematic diagram of the first lifting mechanism of the present invention;

[0022] Figure 4 is a three-dimensional structural schematic diagram of the second lifting mechanism of the present invention;

[0023] Figure 5 is an exploded three-dimensional structural schematic diagram of the second lifting mechanism with a lifting part of the present invention;

[0024] Figure 6 is a side structural schematic diagram of the sling of the present invention.

[0025] In the figure: 1, main lifting beam; 11, upper beam; 12, lower beam; 2, lifting wheel; 3, first lifting mechanism; 31, upper sliding frame; 32, first cross beam; 33, first lower sliding frame; 34, first rope winding assembly; 4, second lifting mechanism; 41, second cross beam; 42, second lower sliding frame; 43, second rope winding assembly; 44, lifting part; 45, lower sliding frame; 46, limit sliding groove; 47, threaded plate; 48, support rod; 49, limit sliding block. DETAILED DESCRIPTION OF THE INVENTION

[0026] In order to make the technical means, technical features, achieved purposes and effects realized by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0027] Embodiment: As Figures 1 - 6 shown, a novel sling for a galvanized pickling process according to the present invention includes a main lifting beam 1 and two first lifting mechanisms 3. The main lifting beam 1 includes an upper beam 11 and a lower beam 12. Two second lifting mechanisms 4 are respectively arranged at the bottom of the lower beam 12. Two second lifting mechanisms 4 are respectively arranged at the bottom of the lower beam 12. Two lifting wheels 2 are rotatably installed at the top of the upper beam 11 through brackets. Driving members are respectively fixedly installed at the bottoms of the upper beam 11 and the lower beam 12. Two lead screws are respectively fixedly installed at the two output ends of the driving member. The two lead screws at the bottom of the upper beam 11 are respectively threadedly connected to the two first lifting mechanisms 3 for driving the two first lifting mechanisms 3 to slide relatively. The two lead screws at the bottom of the lower beam 12 are respectively threadedly connected to the two second lifting mechanisms 4 for driving the two second lifting mechanisms 4 to slide relatively.

[0028] Specifically, the main lifting beam 1 is divided into two parts, an upper beam 11 and a lower beam 12. The upper beam 11 can provide fixed support for the bracket. Through the bracket, rotational support can be provided for the two lifting wheels 2. The lifting wheels 2 can provide connection support for an external crane. The external crane completes the hoisting connection with the main lifting beam 1 by passing a steel cable through the lifting wheels 2. Sliding grooves are provided on both sides of the upper beam 11 and the lower beam 12 to provide a sliding space and support for the first lifting mechanism 3 and the second lifting mechanism 4. Both the upper beam 11 and the lower beam 12 can provide stable support for the driving member and the lead screw. The driving member is a double-headed driving motor. The two lead screws fixedly connected to the two output ends of the driving member have opposite thread directions. Thus, when the driving member in the main lifting beam 1 works, the two lead screws can be used to drive the two first lifting mechanisms 3 or the two second lifting mechanisms 4 to approach or move away synchronously, facilitating the control of the position of the sling in the first lifting mechanism 3 and the second lifting mechanism 4.

[0029] In this embodiment, the first lifting mechanism 3 further includes an upper sliding frame 31. The upper sliding frame 31 is threadedly slidably installed at the bottom of the upper beam 11. A first cross beam 32 is fixedly installed at the bottom of the upper sliding frame 31. Two first lower sliding frames 33 are arranged on the outer side of the first cross beam 32. A driving member and a lead screw at the bottom of the first cross beam 32 drive the two first lower sliding frames 33 to slide relatively. A first rope winding assembly 34 is fixedly installed at the bottom of one of the first lower sliding frames 33. The first rope winding assembly 34 is used for the winding and unwinding of the sling. One end of the sling far from the first rope winding assembly 34 is rotatably connected to the bottom of the other first lower sliding frame 33.

[0030] Specifically, the upper sliding carriage 31 can engage in a threaded interaction with the lead screw. The upper sliding carriage 31 includes two clamping plates and two sets of rollers. The two clamping plates are attached to both sides of the upper beam 11, and the rollers are located in the sliding grooves of the upper beam 11. When the upper sliding carriage 31 engages in a threaded interaction with the lead screw, the clamping plates being attached to the upper beam 11 provides a limiting function for the upper sliding carriage 31, and the rollers facilitate the sliding of the upper sliding carriage 31. The lower sliding carriage can provide a stable support for the first cross beam 32, and the first cross beam 32 can provide a sliding support for the first lower sliding carriage 33. The first lower sliding carriage 33 is similar in structure to the upper sliding carriage 31. The bottom of the first cross beam 32 can provide a stable support for the driving member. The first rope winding assembly 34 includes a driving motor and a rope winding disc. When the driving motor operates, it can drive the rope winding disc to rotate to change the length of the sling between the two first lower sliding carriages 33. When the driving member at the bottom of the first cross beam 32 operates, it can drive the two lead screws to drive the two first lower sliding carriages 33 to approach or move away synchronously, facilitating the control of the shape of the sling in the first rope winding assembly 34.

[0031] In this embodiment, the first lifting mechanism 3 and the second lifting mechanism 4 each include a retractable sling. When the sling of the first lifting mechanism 3 lifts the stacked metal flat tubes in the pickling tank, the sling of the second lifting mechanism 4 and the sling of the first rope winding assembly 34 are alternately exchanged in the air.

[0032] Specifically, stack the metal flat tubes and immerse them in the pickling bath to allow the metal flat tubes to fully react with the liquid in the pickling bath. When it is necessary to lift the stacked metal flat tubes, first move the sling in the first rope-receiving assembly 34 to both ends of the metal flat tubes and lower it. Start the driving member at the bottom of the upper beam 11 to drive the two first lifting mechanisms 3 to approach each other, so that the first lifting mechanisms 3 drive the two slings in the first rope-receiving assembly 34 to move to the bottom near the middle position at both ends of the metal flat tubes respectively. Lift the spreader by the crane, move the metal flat tubes above the pickling bath, then start the driving motor of the second rope-receiving assembly 43 to lengthen the sling, and move the two slings in the second lifting mechanism 4 to the bottom near the middle position at both ends of the metal flat tubes. Compared with the positions of the two slings of the first lifting mechanism 3, the two slings in the second lifting mechanism 4 are closer to both ends of the metal flat tubes. Start the driving motor in the second rope-receiving group to shorten the sling, so that the sling contacts the metal flat tubes. Start the driving member in the second lifting mechanism 4 to drive the lifting rope to wind and fasten the metal flat tubes. Then start the driving motor in the first rope-receiving group to increase the length of the two slings, so that the two slings in the first lifting mechanism 3 no longer contact the surface of the metal flat tubes. Move the two slings in the first lifting mechanism 3 away from each other and leave the position of the metal flat tubes, so that the slings of the first lifting mechanism 3 and the slings of the second lifting mechanism 4 complete the alternating exchange in the air. Finally, put the metal flat tubes into the fluxing bath through the slings in the second lifting mechanism 4. In this way, the slings in the first lifting mechanism 3 only contact the liquid in the pickling bath, while the slings in the second lifting mechanism 4 only contact the liquid in the hot-dip galvanizing bath, reducing mutual interference.

[0033] In this embodiment, the second lifting mechanism 4 further includes a second cross beam 41. The inner side of the bottom wall of one of the second cross beams 41 bulges upward to form a lifting portion 44. When the slings are alternately exchanged, one end of the metal flat tube located at the lifting portion 44 is higher than the other end, and the metal flat tube is in an inclined state.

[0034] Specifically, there is one second cross beam 41 in each of the two second lifting mechanisms 4. The inner side of the bottom wall of the sliding groove of one of the second cross beams 41 bulges upward, and the sliding groove of the other second cross beam 41 is in a horizontal state. When the slings of the first lifting mechanism 3 and the slings of the second lifting mechanism 4 are alternately exchanged in the air, start the two driving members in the second lifting mechanism 4. The two second lower sliding frames 42 and the two lower sliding frames 45 approach each other respectively, driving the two ends of the sling to move and wrap and fasten the metal flat tubes. Under the action of the lifting portion 44, the height of the final stop position of the lower sliding frame 45 is higher than the height of the second lower sliding frame 42, so that one end of the metal flat tube close to the lifting portion 44 is higher than the other end. At this time, the inclination of the metal flat tube can facilitate the smooth outflow of the liquid inside the metal flat tube, reduce the entry of the pickling solution inside the metal flat tube into the fluxing bath, and reduce the influence of the residual pickling solution in the metal flat tube on the liquid in the fluxing bath.

[0035] In this embodiment, two lower sliding frames 45 are slidably mounted at the bottom of a second cross beam 41 with a lifting portion 44 of a protrusion. Two limiting sliding grooves 46 are penetratingly formed inside the lower sliding frames 45. Two threaded plates 47 are threadedly driven by a driving member and a lead screw at the bottom of the second cross beam 41. Support rods 48 are fixedly mounted on both sides of the threaded plates 47. Limiting sliders 49 are rotatably mounted on the outer sides of the support rods 48 through bearings, and the limiting sliders 49 are located inside the limiting sliding grooves 46. The bottoms of two second lower sliding frames 42 are relatively slid by a driving member and a lead screw at the bottom of the other second cross beam 41.

[0036] Specifically, the lower sliding frames 45 can provide a penetrating opening space for the limiting sliding grooves 46, and the limiting sliding holes can provide a sliding space and a limiting function for the limiting sliders 49. When the driving member drives the lead screw to rotate, the lead screw drives the two threaded plates 47 to approach each other by means of a thread, so that the threaded plates 47 drive the two lower sliding frames 45 to move closer to each other through the limiting sliders 49. When the lower sliding frames 45 move to the position of the lifting portion 44 of the protrusion, the lower sliding frames 45 are tilted under the action of the inclined surface of the lifting portion 44. At this time, the lower sliding holes drive the limiting sliders 49 to rotate through the limiting sliding grooves 46, so that the limiting sliders 49 rotate relative to the support rods 48. The lead screw continues to drive the two threaded plates 47 to approach each other, so that the lower sliding frames 45 gradually move upward. At this time, the lower sliding frames 45 slide relative to the limiting sliders 49, so that the lower sliding frames 45 can smoothly move obliquely upward along the inclined surface of the lifting portion 44.

[0037] In this embodiment, second rope winding assemblies 43 are respectively arranged at the bottoms of the lower sliding frames 45 and the second lower sliding frames 42.

[0038] Specifically, the second rope winding assemblies 43 are the same as the first rope winding assemblies 34, and both are composed of a driving motor and a rope winding disc. By starting the driving motor to drive the rope winding disc to rotate, the rope winding and unwinding of the sling by the rope winding disc can be completed.

[0039] Working principle: The staff first uses a steel cable to connect the lifting appliance with the crane. The initial state of the lifting appliance is as Figure 1 shown. After the stacked metal flat tubes are soaked in the pickling tank for a period of time, the lifting appliance is moved to the top of the pickling tank by the crane, and the lifting appliance is moved downward so that the slings of the first lifting mechanism 3 sink into the pickling tank. The driving member at the bottom of the upper beam 11 is started to drive the two first lifting mechanisms 3 to move in a direction approaching each other, so that the first lifting mechanisms 3 drive the slings to move to the bottom of the stacked metal flat tubes. The driving member in the first lifting mechanism 3 is started to drive the two first lower sliding frames 33 to approach each other, so that the first lower sliding frames 33 drive the two ends of the sling to move, so that the sling approximately forms a circle to squeeze and limit the stacked metal flat tubes, improving the stability of the metal flat tubes during the moving process;

[0040] Lift the spreader upward by the crane. Then start the drive motor in the second rope winding assembly 43 to release the sling in the rope winding disc, so that the space formed by the sling is larger than the total cross-section of multiple metal flat tubes. Start the drive member at the bottom of the lower beam 12 to drive the two second lifting mechanisms 4 to approach each other, and move the two slings in the second lifting mechanism 4 to the bottom near the middle positions at both ends of the metal flat tube. And compared with the positions of the two slings of the first lifting mechanism 3, the two slings in the second lifting mechanism 4 are closer to both ends of the metal flat tube. Start the drive motor in the second rope winding group to shorten the sling, so that the sling contacts the surface of the metal flat tube. Start the drive member in the second lifting mechanism 4 to drive the lifting rope to wind and fasten the metal flat tube. During the operation of the drive member of the second lifting mechanism 4, due to the action of the lifting part 44, the metal flat tube will be in an inclined state, which is convenient for the pickling solution inside the metal flat tube to flow out;

[0041] After that, start the drive motor in the first rope winding group to increase the length of the two slings, so that the two slings in the first lifting mechanism 3 no longer contact the surface of the metal flat tube. Move the two slings in the first lifting mechanism 3 away from each other, so that the two slings in the first lifting mechanism 3 are away from both ends of the metal flat tube. Start the first rope winding assembly 34 to take in and tighten the sling into a horizontal form, so that the sling of the first lifting mechanism 3 and the sling of the second lifting mechanism 4 complete an alternating exchange in the air. Finally, put the metal flat tube into the fluxing bath through the sling in the second lifting mechanism 4;

[0042] Finally, start the second rope winding assembly 43 to take in the sling through the rope winding disc, and start the first rope winding assembly 34 to restore the sling to its initial form to complete the reset.

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope claimed by the present invention. The scope claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel sling for a galvanized pickling process, comprising a main lifting beam (1) and two first lifting mechanisms (3), characterized in that: The main lifting beam (1) includes an upper beam (11) and a lower beam (12), and two second lifting mechanisms (4) are respectively arranged at the bottom of the lower beam (12); The first lifting mechanism (3) and the second lifting mechanism (4) respectively include retractable sling straps. When the sling straps of the first lifting mechanism (3) lift the stacked metal flat tubes in the pickling tank, the sling straps of the second lifting mechanism (4) and the sling straps of the first rope winding assembly (34) are alternately exchanged in the air; The second lifting mechanism (4) further includes a second cross beam (41). The inner side of the bottom wall of one of the second cross beams (41) protrudes upward to form a lifting part (44). When the sling straps are alternately exchanged, one end of the metal flat tube located at the lifting part (44) is higher than the other end, and the metal flat tube is in an inclined state.

2. The novel sling for the galvanized pickling process according to claim 1, wherein: Two lifting wheels (2) are rotatably installed at the top of the upper beam (11) through brackets, and driving members are respectively fixedly installed at the bottoms of the upper beam (11) and the lower beam (12). Two output ends of the driving members are respectively fixedly installed with lead screws.

3. The novel sling for galvanized pickling process according to claim 2, characterized in that: The two lead screws at the bottom of the upper beam (11) are respectively in threaded connection with the two first lifting mechanisms (3) to drive the two first lifting mechanisms (3) to slide relatively.

4. The novel sling for the galvanized pickling process according to claim 3, characterized in that: The two lead screws at the bottom of the lower beam (12) are respectively in threaded connection with the two second lifting mechanisms (4) to drive the two second lifting mechanisms (4) to slide relatively.

5. The novel sling for the galvanized pickling process according to claim 1, characterized in that: The first lifting mechanism (3) further includes an upper sliding frame (31). The upper sliding frame (31) is threadedly slidably installed at the bottom of the upper beam (11). A first cross beam (32) is fixedly installed at the bottom of the upper sliding frame (31). Two first lower sliding frames (33) are arranged on the outer side of the first cross beam (32). A driving member and a lead screw are arranged at the bottom of the first cross beam (32) to drive the two first lower sliding frames (33) to slide relatively. A first rope winding assembly (34) is fixedly installed at the bottom of one of the first lower sliding frames (33). The first rope winding assembly (34) is used for retracting and releasing the sling strap. One end of the sling strap away from the first rope winding assembly (34) is rotatably connected to the bottom of the other first lower sliding frame (33).

6. The novel spreader for the galvanized pickling process according to claim 1, wherein: Two lower sliding frames (45) are slidably installed at the bottom of the second cross beam (41) with a protruding lifting part (44). Two limiting sliding grooves (46) are penetrated and opened inside the lower sliding frames (45). Two threaded plates (47) are threadedly driven by a driving member and a lead screw at the bottom of the second cross beam (41). Support rods (48) are respectively fixedly installed on both sides of the threaded plates (47). Limiting sliding blocks (49) are rotatably installed on the outer sides of the support rods (48) through bearings, and the limiting sliding blocks (49) are located inside the limiting sliding grooves (46).

7. The novel sling for the galvanized pickling process according to claim 1, characterized in that: Two second lower sliding frames (42) are threadedly driven by a driving member and a lead screw at the bottom of the other second cross beam (41) to slide relatively.

8. The novel sling for galvanized pickling process according to claim 7, wherein: Second rope winding assemblies (43) are respectively arranged at the bottoms of the lower sliding frames (45) and the second lower sliding frames (42).

Images