Crane pulley disassembling and assembling mechanism

Abstract

The utility model discloses a crane pulley disassembling and assembling mechanism which comprises a weight box and a support, the support comprises two semi-arc-shaped side plates, and the two semi-arc-shaped side plates are vertically welded on the weight box; the width of the inner sides of the two semi-arc side plates is 20-25 mm larger than the width of a hub of the tackle. The support further comprises a supporting plate used for pressing the semi-arc-shaped side plates, and the supporting plate is embedded above the two semi-arc-shaped side plates. And the pulley is embedded above the supporting plate to realize disassembly and assembly. According to the crane tackle dismounting and mounting mechanism, the conventional construction process of dismounting and mounting the crane tackle is simplified, the construction period can be obviously shortened, and the working efficiency is obviously improved. The crane pulley dismounting and mounting mechanism is low in manufacturing cost, easy to operate, safe and reliable, and the labor intensity of constructors is reduced. And the crane pulley dismounting and mounting mechanism is also suitable for other occasions such as cutting, replacing and hoisting of reverse jacking structures such as warehouses and inner bottoms, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of crane pulley disassembly and assembly, and in particular to a crane pulley disassembly and assembly mechanism. Background Art

[0002] Cranes are widely used in the fields of shipping, construction, port logistics, industrial production, etc., and play a vital role in modern industrial production. As one of the important components of the crane pulley group, the pulley can change the traction direction and traction of the wire rope to realize the lifting tool of the moving and transporting objects. The pulley group combines a certain number of fixed pulleys or movable pulleys, pins, cloths and rigging, etc., which can not only reduce the traction force, but also change the direction of the pulling force. Usually, heavier mechanical equipment is lifted with less traction. As one of the important movable and consumable parts of the crane, the pulley needs to be regularly inspected, maintained and repaired, and even replaced, such as the pulley groove, pin, cloth, pulley base, etc.

[0003] The pulley block of a large crane has many pulleys and they are heavy, especially the pulley block just below the boom head. The pulley block there has a small space and does not have the lifting height of the hoist. The boom is a closed box structure as a whole, with a special force structure. Conventional thermal welding is used, and the safety and quality control requirements are strict. There is no suitable lifting point for the pulley, etc. Therefore, there are many disassembly and assembly procedures and it is difficult. The conventional disassembly and assembly method generally places the boom on the rest arm first, removes and recycles the wire rope, and places the entire boom on the tire frame. After the boom is turned over 180°, the pulley at this location is dismantled and inspected, and then turned over again, and then the boom is reinstalled. This has the disadvantages of many construction processes, long construction period, high resource consumption, and high operation risks. Utility Model Content

[0004] The utility model aims to overcome at least one defect of the above-mentioned prior art and provide a crane pulley disassembly and assembly mechanism to achieve the purpose of shortening the construction period and improving the disassembly and assembly efficiency.

[0005] The utility model provides a crane pulley disassembly and assembly mechanism, comprising a counterweight box and a support, the support comprising two semi-arc side plates, the two semi-arc side plates are vertically welded to the counterweight box; the inner width of the two semi-arc side plates is 20-25mm wider than the wheel hub of the pulley; the support also comprises a support plate for pressing the semi-arc side plates, the support plate is embedded above the two semi-arc side plates; the pulley is embedded above the support plate to realize disassembly and assembly.

[0006] Furthermore, a plurality of weight blocks are arranged in the counterweight box.

[0007] Furthermore, the upper surface of the counterweight box and the two semi-arc side plates are symmetrically welded about the center line of the upper end surface of the counterweight box.

[0008] Furthermore, two first lifting ears for lifting are symmetrically welded to the upper end of the outer side of the support plate; and lifting ear holes for matching installation and adjustment are provided at both ends of the semi-arc side plate.

[0009] Furthermore, reinforcing ribs are symmetrically provided at the center positions on both sides of the counterweight box close to the bottom surface, and the reinforcing ribs are used to prevent tipping during operation.

[0010] Furthermore, a second lifting lug is provided on the reinforcing rib plate.

[0011] Furthermore, the crane pulley disassembly and assembly mechanism also includes a gate-shaped hanger, which is welded by H-shaped channel steel and seamless steel pipe; the two ends of the gate-shaped hanger are connected to the side plates of the pulley seat for hanging and adjusting the hoist.

[0012] Furthermore, the crane pulley disassembly and assembly mechanism also includes a locking mechanism, which is arranged on the top edge of the semi-arc side plate. The locking mechanism is a fixed locking pin and a tooth seat.

[0013] The semi-arc side plates and support plates of the utility model are made according to the outline dimensions of the pulley, the inner width of the two semi-arc side plates is 20-25mm wider than the pulley hub, and ear holes for matching installation and adjustment are opened at both ends of the two semi-arc side plates. The positions of the fixing locking pins and the tooth seats are arranged circumferentially according to the bottom size of the pulley wire rope groove hub, and two first ears for lifting are symmetrically welded on the upper outer end of the support plate; the lower counterweight box is a closed long strip box structure, which is convenient for on-site lifting and does not scratch the traction wire rope around the hook head. According to the dead weight of the pulley and the center of gravity position of the pulley fixed on the support, the dead weight of the steel box and its center of gravity position, the position of the lifting ear and other parameters, the minimum weight of the required pressure iron in the counterweight box and the outline dimensions of the customized box are calculated to facilitate filling with many small weights. The purpose is to ensure that the crane pulley disassembly and assembly mechanism and the pulley as a whole will not tip over when lifting through the lifting points on both sides of the support plate, that is, the pulley wheel faces up and the counterweight box faces down.

[0014] The upper surface of the counterweight box and the two semi-arc side plates are symmetrically welded with the center line of the upper end surface of the counterweight box. Reinforcing rib plates are symmetrically provided on the center positions of both sides of the counterweight box against the bottom surface. The reinforcing rib plates serve as supporting feet to prevent the crane pulley disassembly and assembly mechanism and the pulley from tipping over when the crane pulley disassembly and assembly mechanism and the pulley are placed vertically on the ground as a whole. Lifting ears are provided on the reinforcing rib plates for adjusting the pulley position laterally of the hoist.

[0015] The gate-type hanger is mainly welded by H-shaped channel steel and thick-walled seamless steel pipe, and is used to facilitate on-site hanging and lifting, adjusting the hoist of the crane pulley disassembly and assembly mechanism, and lifting and loosening the hoist of the lifting wire rope.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] (1) The crane pulley disassembly and assembly mechanism of the utility model simplifies the construction process of conventional crane pulley disassembly and assembly, can significantly shorten the construction period, and significantly improve work efficiency.

[0018] (2) The crane pulley disassembly and assembly mechanism of the utility model has low manufacturing cost, is easy to operate, safe and reliable, and reduces the labor intensity of the constructors. The crane pulley disassembly and assembly mechanism is also applicable to other occasions such as cutting and lifting of reverse top structures such as warehouses and inner bottoms, and has high practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the main structure of the crane pulley disassembly and assembly mechanism of the utility model.

[0020] Figure 2 It is a side structural schematic diagram of the crane pulley disassembly and assembly mechanism of the utility model.

[0021] Figure 3 The utility model is a schematic diagram of the gate-shaped hanger structure of the crane pulley disassembly and assembly mechanism.

[0022] Figure 4 The utility model is a schematic diagram of a method for fixing a pulley of a crane pulley disassembly and assembly mechanism.

[0023] Figure 5 for Figure 4 Schematic diagram of the AA cross-sectional structure. DETAILED DESCRIPTION

[0024] The drawings in the embodiments provide a more detailed description of the technical solutions in the embodiments of the utility model. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of the utility model, not all of them. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the utility model, and should not be construed as limitations on the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. The embodiments of the utility model are described in detail below in conjunction with the drawings.

[0025] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0027] Example

[0028] This embodiment provides a crane pulley disassembly and assembly mechanism 100, such as Figure 1 As shown, it includes a counterweight box 1 and a support 2, combined with Figure 2 As shown, the support 2 includes two semi-arc side panels 21, which are vertically welded to the counterweight box 1; the inner width of the two semi-arc side panels 21 is 20 to 25 mm wider than the wheel hub of the pulley; the support 2 also includes a support plate 22 for pressing the semi-arc side panels 21, and the support plate 22 is embedded above the two semi-arc side panels 21; the pulley is embedded above the support plate 22 to achieve disassembly and assembly.

[0029] A plurality of weights are arranged in the counterweight box 1. The upper surface of the counterweight box 1 is symmetrically welded to the two semi-arc side plates 21 about the center line of the upper end surface of the counterweight box 1.

[0030] like Figure 1 As shown, two first lifting ears 3 for lifting are symmetrically welded to the upper end of the outer side of the support plate 22; and lifting ear holes 4 for matching installation and adjustment are provided at both ends of the semi-arc side plate 21.

[0031] like Figure 2 As shown, the center positions of both sides of the counterweight box 1 are symmetrically provided with reinforcing ribs 5 close to the bottom surface, and the reinforcing ribs 5 are used to prevent the box from tipping over during operation. The reinforcing ribs 5 are provided with second lifting ears 6.

[0032] Combination Figure 3 As shown, the crane pulley disassembly and assembly mechanism 100 also includes a gate-shaped hanger 7, which is welded by H-shaped channel steel and seamless steel pipe; the two ends of the gate-shaped hanger 7 are connected to the side plates of the pulley seat for hanging and adjusting the hoist.

[0033] like Figure 2 As shown, the crane pulley disassembly and assembly mechanism 100 further includes a locking mechanism 8, and the locking mechanism 8 is arranged at the top edge of the semi-arc side plate 21. The locking mechanism 8 is a fixed locking pin and a tooth seat.

[0034] Combination Figures 4-5 As shown, the crane pulley disassembly and assembly mechanism 100 of this embodiment is used for the disassembly method of the wire rope pulley under the head of the large crane boom 101 and the transportation and installation scheme as follows:

[0035] S1: The crane boom 101 is completely lowered onto the rest arm 102, and then the luffing and lifting wire ropes 103 are continuously loosened until the luffing and lifting wire ropes 103 are completely loosened, fall down, and are not subjected to stress.

[0036] S2: The crane system is powered off and locked to prevent misoperation; scaffolding is set up around the pulley assembly at the head of the boom 101 and reported for inspection.

[0037] S3: According to the diameter and number of the wire rope of the pulley group under the head of the boom 101, a fixed wire rope half rope clamp 104 is made, and a lifting lug is welded on one side of the rope clamp 104. After welding, the burrs around the inside and outside are polished to be smooth.

[0038] S4: According to the outer contour dimensions of the pulley 105 under the head of the boom 101, the crane pulley disassembly and assembly mechanism 100 of the utility model is manufactured; at the same time, the screw rod, tooling nut, hollow oil jack, jacking sleeve, hydraulic pump, oil pipe and other tools for hydraulically disassembling the pulley block pin are prepared.

[0039] S5: According to the distribution of the center of gravity of each pulley 105, the lifting lugs for hanging the hoist are welded at the corresponding positions of the side plates of the pulley seat 106. The gate-shaped hangers 7 for hanging the hoist are welded on both sides of the outer side plates of the pulley seat 106 respectively.

[0040] S6: After cleaning the butter on both sides of the wire rope of the disassembled pulley 105, respectively, use the wire rope clamp 104, protective pad and bolts to clamp the wire rope 103, and use the hoist 107 to pull it a little bit until all the pulleys 105 are completely unaffected by the wire rope 103.

[0041] S7: Remove the safety clip of the disassembled pulley pin shaft, and weld the tooling nut on the end face of the disassembled pin shaft.

[0042] S8: Use the crane and hoist 107 to first transfer the crane pulley disassembly and assembly mechanism 100 to just below the pulley block.

[0043] S9: Use the hoist 107 to slowly lift the crane pulley assembly and disassembly mechanism 100 and its arc groove into the lower part of the pulley 105 outside the pulley assembly until the pulley is supported as a whole, and symmetrically tighten the three locking screws on both sides to firmly fix the crane pulley assembly and disassembly mechanism 100 on the web of the lower hub of the pulley wire rope.

[0044] S10: Use the hoists 107 on the front and rear sides to lift the crane pulley disassembly and assembly mechanism 100 until the crane pulley disassembly and assembly mechanism 100 roughly balances the weight of the pulley. And use the hydraulic oil jack 108, the screw rod 109, and the lifting sleeve 110 to cooperate to loosen the pin 111 of the pulley 105. Pay attention to the pulling process and control the pulling distance until the pin 111 is completely separated from the first pulley 105, first remove the adjustment washers on the left and right sides of the pulley 105, and then slowly lower the hoist 107 and the crane pulley disassembly and assembly mechanism 100, at which time the pulley 105 is lowered along with the crane pulley disassembly and assembly mechanism 100.

[0045] S11: With the cooperation of other hoists or cranes, the pulley 105 together with the crane pulley disassembly and assembly mechanism 100 is hoisted to the dock for storage.

[0046] S12: Similarly, continue to dismantle the second, third, and fourth pulleys; after all the old pulleys are removed, clean, measure, and inspect the site. Check the dimensions of the new and old pulleys and the pin shaft.

[0047] S13: Reinstall the pulley in the reverse order of the above. Finally, loosen the hoist, remove the rope clamp 104 of the wire rope, and restore all the wire ropes of the pulley. Cut off the newly welded lifting lugs, gate-shaped hangers and other temporary crane pulley disassembly and assembly mechanisms 100, and polish the welds and damaged paint. After other repairs to the crane are completed, repair the paint, clean the site, and remove the surrounding scaffolding. Unlock the crane, supply power, slowly lift the luffing and hook wire ropes, and retract the boom 101. Perform a no-load test first, and then perform a load test after passing the test.

[0048] The above embodiments are only used to illustrate the technical solution of the utility model and are not intended to limit it. Although the utility model is described in detail with reference to the above preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model. Those skilled in the art can also make other changes within the spirit of the utility model and apply them to the design of the utility model, as long as they do not deviate from the technical effects of the utility model. These changes made according to the spirit of the utility model should be included in the scope of protection claimed by the utility model.

Claims

1. A crane pulley disassembly and assembly mechanism, characterized in that: It comprises a counterweight box (1) and a support (2), wherein the support (2) comprises two semi-arc-shaped side plates (21), and the two semi-arc-shaped side plates (21) are vertically welded to the counterweight box (1); the inner width of the two semi-arc-shaped side plates (21) is 20 to 25 mm wider than the wheel hub of the pulley; The support (2) further comprises a support plate (22) for pressing the semi-arc-shaped side plates (21), wherein the support plate (22) is embedded above the two semi-arc-shaped side plates (21); and a pulley is embedded above the support plate (22) to achieve assembly and disassembly.

2. The crane pulley disassembly and assembly mechanism according to claim 1, characterized in that: The counterweight box (1) is provided with a plurality of weight blocks.

3. The crane pulley disassembly and assembly mechanism according to claim 1, characterized in that: The upper surface of the counterweight box (1) and the two semi-arc-shaped side plates (21) are symmetrically welded along the center line of the upper end surface of the counterweight box (1).

4. The crane pulley disassembly and assembly mechanism according to claim 1, characterized in that: Two first lifting ears (3) for lifting are symmetrically welded to the upper end of the outer side of the support plate (22); and lifting ear holes (4) for matching installation and adjustment are provided at both ends of the semi-arc-shaped side plate (21).

5. The crane pulley disassembly and assembly mechanism according to claim 1, characterized in that: Reinforcement ribs (5) are symmetrically provided at the center positions of both sides of the counterweight box (1) close to the bottom surface, and the reinforcement ribs (5) are used to prevent tipping over during operation.

6. The crane pulley disassembly and assembly mechanism according to claim 5, characterized in that: The reinforcing rib plate (5) is provided with a second lifting lug (6).

7. The crane pulley disassembly and assembly mechanism according to claim 1, characterized in that: It also comprises a gate-shaped hanger (7), which is welded from an H-shaped channel steel and a seamless steel pipe; two ends of the gate-shaped hanger (7) are connected to two sides of the side plate of the pulley seat for hanging and adjusting the hoist.

8. The crane pulley disassembly and assembly mechanism according to claim 1, characterized in that: It also comprises a locking mechanism (8), wherein the locking mechanism (8) is arranged on the top edge of the semi-arc-shaped side plate (21).

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