Nodular cast iron pipe lifting mechanism

Abstract

The utility model relates to a nodular cast iron pipe lifting mechanism and belongs to the technical field of lifting structures. The nodular cast iron pipe conveying device comprises at least two sets of supports, fixed pulleys and rope rollers, the supports are used for being installed at a discharging port of a centrifugal machine so as to bear nodular cast iron pipes sent out by the centrifugal machine, the supports are arranged at intervals in the front-back direction, the number of the fixed pulleys is the same as that of the supports, and the number of the rope rollers is the same as that of the fixed pulleys. The fixed pulleys correspond to the supports in position and are used for being installed on the sides, back to the centrifugal machine, of the corresponding supports, the supports and the fixed pulleys are used for being arranged on the two horizontal sides of a nodular cast iron pipe conveying line located below the centrifugal machine respectively, and the rope rollers correspond to the fixed pulleys in position and are arranged on the sides, back to the supports, of the fixed pulleys. Ropes are wound on the rope rollers, and the free ends of the ropes in the rope rollers cross over the fixed pulleys from the positions above the corresponding fixed pulleys and are connected to the corresponding supports. The utility model has the advantages of simple structure and lower cost.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting structures, and in particular to a lifting mechanism for ductile iron pipes. Background Art

[0002] On a ductile iron pipe production line, in some steps, it is necessary to vertically transfer ductile iron pipes. For example, the ductile iron pipes produced by the upper centrifuge need to be transferred to the lower mechanism for further forward conveying. Usually, a lifting device similar to a lift is used for vertical lifting and transfer. However, the lifting device has a complex structure, high cost, and a safety risk of jacking up when the upper limit is damaged. At the same time, the ductile iron pipes produced by the centrifuge usually have a temperature of more than 600 degrees. Therefore, during the vertical lifting process of the hoist, the cast pipes must be rotated by a rotating mechanism to prevent the hot-state cast pipes from deforming. In this way, the structural design of the lifting device will become very complex and the production cost will be high. Summary of the Utility Model

[0003] The utility model provides a lifting mechanism for ductile iron pipes to solve the technical problems of complex production equipment structure and high equipment cost caused by the need to use a lifting device and a rotating mechanism in cooperation to lift and transfer ductile iron pipes in the prior art.

[0004] To solve the above problems, a lifting mechanism for ductile iron pipes provided by the utility model adopts the following technical solutions:

[0005] A lifting mechanism for ductile iron pipes includes a bracket, a fixed pulley, and a rope drum. There are at least two groups of brackets. The brackets are used to be installed at the discharge port of the centrifuge to receive the ductile iron pipes sent out by the centrifuge. Each group of brackets is arranged at intervals in the front-rear direction. The number of fixed pulleys is the same as the number of brackets, and the number of rope drums is the same as the number of fixed pulleys. Each fixed pulley corresponds to the position of each bracket and is used to be installed on the side of the corresponding bracket facing away from the centrifuge. The brackets and the fixed pulleys are respectively arranged on the horizontal two sides of the ductile iron pipe conveying line below the centrifuge, and the horizontal distance between the brackets and the fixed pulleys from the ductile iron pipe conveying line is equal. Each rope drum corresponds to the position of each fixed pulley and is arranged on the side of the fixed pulley facing away from the bracket. A rope is wound around each rope drum. The free end of the rope in each rope drum passes over the corresponding fixed pulley from above and is connected to the corresponding bracket. The part of the rope between the bracket and the fixed pulley is used to receive the ductile iron pipes rolling down from the bracket.

[0006] Further, the fixed pulley and the rope drum are higher than the bracket.

[0007] Further, the fixed pulley is higher than the corresponding rope drum.

[0008] Furthermore, the top surface of the bracket is inclined downward in a direction toward the corresponding fixed pulley.

[0009] The adoption of the technical solution facilitates the ductile iron pipe on the bracket to roll onto the rope between the bracket and the fixed pulley.

[0010] Furthermore, a lifting ring is provided on the bracket, and a locking buckle is connected to the free end of the rope, and the locking buckle is hooked on the lifting ring on the corresponding bracket to realize the connection between the free end of the rope and the corresponding bracket.

[0011] Furthermore, the lock buckle is a U-shaped snap ring.

[0012] Furthermore, the rope is a steel wire rope.

[0013] Furthermore, the diameter of the rope is 15.5 mm.

[0014] Furthermore, a driving motor is provided at the end of the rope drum, and the driving motor is transmission-connected to the rope drum, and the driving motor drives the rope drum to reciprocate to release or reel in the rope.

[0015] The utility model provides a ductile iron pipe lifting mechanism with the following beneficial effects: the ductile iron pipe sent out by the centrifuge rolls onto the rope between the bracket and the fixed pulley, and then the rope drum rotates to release the rope wound on the rope drum, so that the ductile iron pipe on the rope moves downward. During the downward movement of the ductile iron pipe, the ductile iron pipe rotates due to the friction of the rope, so that the ductile iron pipe can keep rotating while moving downward, which can prevent the ductile iron pipe from being deformed in the hot state. Compared with the ductile iron pipe driven downward by setting a lifting device and a rotating mechanism, the structure is simpler and the cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present invention will become easy to understand. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0017] Figure 1 A side view of a ductile iron pipe lifting mechanism provided by the utility model;

[0018] Figure 2 The utility model provides a top view of a ductile iron pipe lifting mechanism.

[0019] Description of reference numerals:

[0020] 1. Bracket; 2. Ductile iron pipe; 3. Rope; 4. Fixed pulley; 5. Rope drum; 6. Chain bracket; 7. Lifting ring. Detailed implementation mode

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Those skilled in the art should know that the embodiments described below are a part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present utility model.

[0022] The following is an embodiment of a lifting mechanism for ductile iron pipes provided by the present utility model:

[0023] As Figure 1 、 Figure 2 shown, a lifting mechanism for ductile iron pipes includes a bracket 1, a fixed pulley 4 and a rope drum 5.

[0024] There are two sets of brackets 1 arranged at intervals in the front-back direction. The two sets of brackets 1 are used to be installed at the discharge port of the centrifuge for receiving the ductile iron pipes 2 sent out by the centrifuge. The top surface of the bracket 1 slopes downward along the direction away from the centrifuge. A lifting ring 7 is connected to the bracket 1, and the lifting ring 7 is located on the side of the bracket 1 away from the centrifuge.

[0025] There are two sets of fixed pulleys 4. The two sets of fixed pulleys 4 correspond to the two sets of brackets 1 one by one. The fixed pulley 4 is arranged on the side of the corresponding bracket 1 away from the centrifuge and the fixed pulley 4 is higher than the corresponding bracket 1. The fixed pulley 4 and the corresponding bracket 1 are respectively arranged on the horizontal two sides of the ductile iron pipe conveying line under the centrifuge, and the horizontal distance between the fixed pulley 4 and the corresponding bracket 1 from the ductile iron pipe conveying line is equal.

[0026] There are two sets of rope drums 5. The two sets of rope drums 5 correspond to the two sets of fixed pulleys 4 one by one. The rope drum 5 is arranged on the side of the corresponding fixed pulley 4 away from the bracket 1. The rope drum 5 is higher than the corresponding bracket 1 and lower than the corresponding fixed pulley 4.

[0027] A rope 3 is wound around the rope drum 5. The rope 3 is a steel wire rope with a diameter of 15.5 mm. The free end of the rope 3 is connected with a buckle. The buckle is a U-shaped snap ring. The U-shaped snap ring is a prior art and will not be described in detail here. The free ends of the ropes 3 in each rope drum 5 pass over the corresponding fixed pulley 4 from above the fixed pulley 4 and are connected to the lifting ring 7 on the bracket 1 through the buckle. The part of the rope 3 between the bracket 1 and the fixed pulley 4 is used to receive the ductile iron pipe 2 rolling down from the bracket 1. When the ductile iron pipe 2 moves onto the rope 3, the rope 3 can be pressed tightly against the corresponding fixed pulley 4 from top to bottom.

[0028] A driving motor is connected to the end of the rope drum 5. The driving motor is in transmission connection with the rope drum 5 and is used to drive the rope drum 5 to rotate reciprocally to release or wind up the rope 3 on the rope drum 5.

[0029] In the scenario where this ductile iron pipe lifting mechanism is applied, the structure of the ductile iron pipe conveying line is specifically that a plurality of chain brackets are arranged at intervals along the conveying direction on the conveying chain, and there are intervals between the chain brackets. When placing the ductile iron pipe on the ductile iron pipe conveying line, the gap between the rope and the chain brackets is made to correspond, so that the ductile iron pipe can come into contact with the chain brackets and thus be conveyed forward by the chain brackets.

[0030] When the present utility model is in use, the ductile iron pipe 2 coming out of the centrifuge rolls onto the bracket 1, and then rolls from the bracket 1 onto the rope 3 between the bracket 1 and the fixed pulley 4. The ductile iron pipe 2 is supported by the rope 3. Then, the driving motor drives the rope drum 5 to rotate, releasing the rope 3 wound on the rope drum 5. The ductile iron pipe 2 moves downward under the action of gravity and at the same time rotates under the frictional action with the rope 3. When the ductile iron pipe 2 falls and comes into contact with the chain bracket 6 on the lower ductile iron pipe conveying line, it is conveyed forward by the chain bracket 6. The ductile iron pipe 2 leaves the rope 3. Then, the driving motor drives the rope drum 5 to rotate to wind up the rope 3, and the rope 3 returns to its initial state to continue conveying the next ductile iron pipe 2.

[0031] When the present utility model lowers the ductile iron pipe 2, it can make the ductile iron pipe 2 rotate, avoiding the deformation of the hot-state cast pipe. The structure of the present utility model is simple and the cost is low.

[0032] In this embodiment, two groups of fixed pulleys 4 are provided and two groups of rope drums 5 are provided. In other embodiments, when the ductile iron pipe 2 to be conveyed is longer, three or more groups of fixed pulleys 4 can be set and the same number of rope drums 5 can be set.

[0033] In this embodiment, the rope 3 is made of steel wire rope, and the diameter of the steel wire rope is 15.5 mm. In other embodiments, when the mass of the ductile iron pipe 2 to be conveyed is heavier, a steel wire rope with a diameter of 18.5 mm can be used. When the mass of the ductile iron pipe 2 to be conveyed is lighter, a steel wire rope with a diameter of 12.5 mm can be used.

[0034] Based on the above description of this specification, those skilled in the art can also understand the terms used as follows. For example, terms indicating orientation or positional relationships such as "upper", "lower", "front", "rear", "left", "right", "width", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings of this specification. They are only for the purpose of facilitating the description of the solution of the present utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or component involved must have the specific orientation, be constructed and operate in the specific orientation. Therefore, the above terms of orientation or positional relationships cannot be understood or interpreted as limitations on the solution of the present utility model.

[0035] In addition, in the description of this specification, the meaning of "a plurality of" is at least two, such as two, three or more, etc., unless otherwise specifically defined.

Claims

1. A lifting mechanism for ductile iron pipes, characterized in that, The utility model comprises a bracket, a fixed pulley and a rope drum, wherein the bracket is provided with at least two groups, the bracket is used to be installed at the discharge port of the centrifuge to receive the ductile iron pipe sent out by the centrifuge, the brackets are arranged at intervals in the front-back direction, the number of fixed pulleys is the same as the number of brackets, the number of rope drums is the same as the number of fixed pulleys, the fixed pulleys correspond to the positions of the brackets respectively, and are used to be installed on the side of the corresponding bracket facing away from the centrifuge, the bracket and the fixed pulley are used to be arranged on the horizontal sides of the ductile iron pipe conveying line located below the centrifuge, and the bracket and the fixed pulley are at the same horizontal distance from the ductile iron pipe conveying line, the rope drums correspond to the positions of the fixed pulleys respectively and are arranged on the side of the fixed pulley facing away from the bracket, a rope is wound on the rope drum, the free end of the rope in each rope drum passes over the fixed pulley from above the corresponding fixed pulley and is connected to the corresponding bracket, and the part of the rope located between the bracket and the fixed pulley is used to receive the ductile iron pipe rolled down from the bracket.

2. The lifting mechanism for ductile iron pipes according to claim 1, characterized in that, The fixed pulley and the rope drum are higher than the bracket.

3. The ductile iron pipe lifting mechanism according to claim 2, characterized in that, The fixed pulley is higher than the corresponding rope drum.

4. A ductile iron pipe lifting mechanism according to any one of claims 1-3, characterized in that, The top surface of the bracket is inclined downward in a direction toward the corresponding fixed pulley.

5. A ductile iron pipe lifting mechanism according to any one of claims 1-3, characterized in that, The bracket is provided with a lifting ring, the free end of the rope is connected with a locking buckle, and the locking buckle hook is hung on the lifting ring on the corresponding bracket to realize the connection between the free end of the rope and the corresponding bracket.

6. The lifting mechanism of a ductile iron pipe according to claim 5, characterized in that The lock buckle is a U-shaped snap ring.

7. A ductile iron pipe lifting mechanism according to any one of claims 1 to 3, characterized in that The rope is a steel wire rope.

8. The lifting mechanism for ductile iron pipes according to claim 7, wherein, The diameter of the rope is 15.5 mm.

9. A ductile iron pipe lifting mechanism according to any one of claims 1-3, characterized in that, A driving motor is provided at the end of the rope drum, and the driving motor is transmission-connected with the rope drum. The driving motor drives the rope drum to rotate back and forth to release or reel in the rope.

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