CN202944984U - Bulk-cargo grab bucket with high grab ratio - Google Patents

Abstract

The utility model discloses a bulk cargo grab with high grabbing ratio, which comprises two symmetrically arranged bucket bodies, two main ribs intersecting at hinge points and fixedly connected, and also includes: a rope guide frame, which is connected with the two main ribs The hinge point is fixedly connected; a pair of movable pulleys are arranged in the corresponding bucket body and fixedly connected with the support rod in the corresponding bucket body; a pair of bucket opening ropes, the first ends of which are respectively connected to the lifting ropes of the external crane Connected, the second ends of which respectively go around the corresponding movable pulleys and connect with the upper part of the corresponding main reinforcement; a pair of closed bucket cables, the first ends of which are connected with the opening and closing cables of the external crane, and the second ends are respectively along the The two external public tangent wires of a pair of movable pulleys are wound several times and then connected to the bucket body corresponding to the side where they are located. The utility model not only has a large grabbing ratio, which greatly reduces the dead load of the grab bucket, but also has light weight and high structural strength, which greatly saves the energy consumed to overcome the dead weight of the grab bucket, thereby greatly improving the ship unloading efficiency.

Description

A high grab ratio bulk cargo grab

technical field

The utility model relates to a bulk cargo unloading grab tool, in particular to a bulk cargo grab with high grabbing ratio.

Background technique

The grab is an important pick-up tool used to grab the goods. It is widely used in port loading and unloading operations, especially in the field of grabbing bulk cargo, such as coal loading and unloading, ore loading and unloading, etc. At the same time, the grab can also be used It is an operation tool for bulk grain unloading.

In the prior art, grabs are divided into loading and unloading grabs and salvage or dredging grabs according to their uses. The lifting capacity of the loading and unloading grabs is not large: generally between 5 and 80 tons; Large, it is mainly used to clean up channel silt; and the loading and unloading grab has a relatively large lifting capacity, because unloading requires a certain operating efficiency. At present, the grabbing ratio of the largest grabbing bucket in China is 1:2.0, and the grabbing ratio of grabbing buckets in the world is also at the same level. However, with the development of ships and shipping, large-scale ships are a trend. The shipping industry Also with the development of large-scale. Therefore, in the field of bulk cargo handling, the existing grabs have a low grab ratio and low operating efficiency, and cannot adapt to the trend of large-scale ships, and the energy consumption is serious, which restricts the further development of bulk cargo handling.

Existing grabs mainly include two categories: long-strut type grabs and scissor-type grabs. The long-strut type grabs include long struts, a bucket body, and a head. This type of grab has a large grabbing force, a good structural force, and is widely used. Most of the grabs adopt the long-strut type, especially the large-tonnage grabs mostly use the long-strut type. Larger force, good form of force, to ensure the stability of the structure. The scissor grab is relatively complex in structure, so it is rarely used at present. In the case of the same lifting capacity, the scissor grab is lighter in weight and has a higher grab ratio. At present, grabs usually use long pole grabs for ship unloading operations, especially bulk cargo grabs. The target of unloading operations is bulk carriers, which need to provide a huge grab ratio to unload bulk carriers. The grab ratio has a certain limit, and it cannot be higher after reaching a certain level. At present, the maximum grab ratio of the long pole grab is 1:2.0, and it is already difficult to increase the grab ratio. This requires changing the grab The grabbing ratio of the grab can be further improved; while the scissor grab has a simple structure and a large grabbing capacity, but its structural strength is relatively high. How to improve the grabbing ratio while ensuring the safety of the grab itself , it must be ensured that the structure of the grab itself can withstand the impact of the load under a large grab ratio.

With the rapid development of large-scale logistics equipment technology in the direction of large-scale and high-tech, bulk cargo grabs are also developing in large-scale and high-efficiency to meet the needs of the development of bulk cargo transportation and new technology development. The existing bulk cargo grab operation shows the following characteristics: first: the grabbing ratio of the grab is getting bigger and bigger; second: the grab operation cycle is getting more and more frequent; third: the lifting capacity of the grab is getting bigger and bigger; Fourth: the grab operation efficiency is high, and it is required to be able to unload bulk carriers at high speed; fifth, the grab safety is high, and the grab structure not only has to bear a large lifting capacity, but also has to output several times the grab when grabbing The self-weight grabbing force is used to grab materials and realize ship unloading operations. Therefore, to increase the grabbing ratio of the grab, it is required that the self-weight of the grab should be as light as possible, and at the same time, it must meet the requirements of high structural strength, large load, high stability and safety, and the new type of grab must meet the above requirements. It is light, reduces the energy consumption of dead loads, and improves the economic efficiency of the grab.

Utility model content

The purpose of this utility model is to provide a bulk cargo grab with a high grab ratio, which not only has a super large grab ratio, but also greatly reduces the dead load of the grab; moreover, it has light weight and high structural strength, which greatly saves the time spent on overcoming the gravity of the grab. Consumed energy, thus greatly improving the efficiency of ship unloading.

In order to achieve the above object, the utility model is achieved through the following technical solutions:

A bulk cargo grab with a high grabbing ratio, comprising two symmetrically arranged bucket bodies, said bucket body comprising two bucket body side plates, a bucket body bottom plate and support rods arranged therein; correspondingly supporting the two-petal buckets The two main ribs of the body, the two main ribs intersect at the hinge point and are fixedly connected, the grab moves in an arc around the hinge point, and also includes:

A rope guide frame, the rope guide frame is fixedly connected to the two main reinforcements at the hinge point;

A pair of movable pulleys, the movable pulley is arranged in the corresponding bucket body and is fixedly connected with the supporting rod in the corresponding bucket body;

A pair of bucket opening ropes, the pair of bucket opening ropes correspond to the two-petal bucket body and the main rib one by one, and the first ends of the pair of bucket opening ropes are respectively connected to the lifting cables of the external crane, and The second end respectively bypasses its corresponding movable pulley and is connected to the upper part of its corresponding main rib;

A pair of closed bucket ropes, the pair of closed bucket ropes correspond to the two bucket bodies one by one, the first end of the pair of closed bucket ropes is connected with the opening and closing rope of the external crane, and the second end of the pair of closed bucket ropes Wrap several circles along the two external tangent lines of the pair of movable pulleys respectively, and then connect with the bucket body corresponding to the side where they are located.

It also includes: a pair of reversing pulleys, the pair of reversing pulleys corresponds to a pair of closed bucket ropes one by one, the closed bucket ropes are reversed by the reversing pulleys, and the two outer public tangent lines of the pair of movable pulleys are wound The starting point is on the movable pulley of the bucket body on the other side.

It also includes: four idler devices, the four idler devices are arranged on the rope guide frame, and each idler device supports an open bucket rope or a closed bucket rope one by one.

The number of turns that the closed bucket rope is wound along the two outer common tangents of the pair of movable pulleys is 2.5.

The material of the bucket body is alloy steel.

The bucket body also includes: a cutting edge, and the cutting edge is welded to the bucket body.

The material of the cutting edge is high-strength steel.

A wear-resistant steel sleeve is also provided at the hinge point.

The open bucket rope and closed bucket rope are steel wire ropes.

Compared with the prior art, the utility model has the following advantages:

1. Not only the grab ratio is super large, reaching 1:3.0, which greatly reduces the invalid load of the grab bucket;

2. Light weight and high structural strength greatly save the energy consumed to overcome the dead weight of the grab bucket, thus greatly improving the efficiency of ship unloading.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of a high grabbing ratio bulk cargo grab of the present invention when it is closed;

Fig. 2 is a schematic diagram of the overall structure of a bulk cargo grab with a high grabbing ratio of the present invention when it is opened;

Fig. 3 is a schematic diagram of the structure of a bulk cargo grab with a high grabbing ratio of the present invention;

Fig. 4 is a schematic diagram of a movable pulley inside the bucket of a high grabbing ratio bulk cargo grab of the present invention;

Figure 5 is a schematic diagram of the rope winding of the open bucket and closed bucket of a high grab ratio bulk cargo grab of the present invention;

Fig. 6 is a structural schematic diagram of a rope guide frame of a bulk cargo grab with a high grabbing ratio according to the present invention;

Fig. 7 is a schematic diagram of the structure of the left bucket body of a bulk cargo grab with high grabbing ratio according to the present invention.

Detailed ways

The utility model will be further elaborated below by describing a preferred specific embodiment in detail in conjunction with the accompanying drawings.

As shown in Figures 1 to 7, a bulk cargo grab with a high grabbing ratio includes two symmetrically arranged bucket bodies 11. The bucket body 11 includes two bucket body side plates 111, a bucket body bottom plate 112 and a The supporting rod and bucket body 11 are made of alloy steel; they respectively correspond to the two main ribs 12 supporting the two-petal bucket body 11. The two main ribs 12 intersect at the hinge point 13 and are fixedly connected. The grab makes an arc around the hinge point 13 Movement also includes: rope guide frame 5, a pair of movable pulleys 22, a pair of open bucket ropes 3, and a pair of closed bucket ropes 4. Among them, the rope guide frame 5 is fixedly connected with the two main ribs 12 at the hinge point 13; the movable pulley 22 is arranged in the corresponding bucket body 11 and is fixedly connected with the support rod in the corresponding bucket body 11; a pair of bucket opening ropes 3 Corresponding to the two-lobed bucket body 11 and the main rib 12 one by one, the first ends of a pair of bucket opening cables 3 are respectively connected to the lifting cables of the external crane, and the second ends are respectively bypassed by their corresponding movable pulleys 22 and connected with them. The upper parts of the corresponding main ribs 12 are connected; a pair of closed bucket cables 4 correspond to the two-lobed bucket bodies 11 one by one, and the first ends of the pair of closed bucket cables 4 are connected with the opening and closing cables of the external crane, and the second ends of the closed bucket cables 4 are connected to each other. The ends are respectively wound several times along the two outer common tangents of a pair of movable pulleys 22 and then connected to the bucket body 11 corresponding to the side where it is located. In this embodiment, the closed bucket rope 4 is wound along the two outer common tangents of a pair of movable pulleys 22 The number of turns is 2.5, through the magnification of the pulley block, the pulley block system provides 2.5 times the pulley increase magnification through the wire rope winding method, and the pulley magnification is set reasonably, which can make the grabbing ratio of the new grab of the utility model larger. It is proved by experiments that It can achieve a grabbing ratio of 1:3.0, which greatly improves the efficiency of unloading. In this embodiment, the open bucket rope 3 and the closed bucket rope 4 are steel wire ropes.

As shown in Figures 1 to 7, in this embodiment, it also includes: a pair of reversing pulleys 7, which correspond to a pair of closed bucket ropes 4 one by one, and the closed bucket ropes 4 are reversed through the reversing pulleys 7, The starting point of the two outer common tangent lines winding a pair of movable pulleys 22 is on the movable pulley 22 of the bucket body 11 on the other side.

As shown in Figures 1 to 7, in this embodiment, it also includes: four idler devices 6, the four idler devices 6 are arranged on the rope guide frame 5, and each idler device 6 supports one by one An open bucket rope 3 or a closed bucket rope 4, so that the four wire ropes of the grab bucket will not be mixed together, ensuring that the rope threading inside the pulley block is simple and convenient, and at the same time, the four steel wire ropes of the grab bucket will not be entangled with each other At the same time, it plays the role of balancing the grab. When the grab grabs the material and lifts up, the steel wire rope of the bucket is stressed at the same time, and the force remains consistent.

As shown in Figures 1 to 7, in this embodiment, the bucket body 11 also includes: a cutting edge 113, which is welded to the bucket body 11, and the material of the cutting edge 113 is high-strength steel (HARDOX400). High strength and high hardness, good wear resistance, so not easy to wear, greatly reducing the amount of maintenance.

As shown in Figures 1 to 7, in this embodiment, the main rib 12 and the rope guide frame 5 are connected by a pin shaft at the hinge point 13, and a wear-resistant steel sleeve is provided at the hinge point 13, which is also lubricated during use. Lubricated with oil, it can ensure the sufficient flexibility of the grab bucket to open and close repeatedly during operation, and prevent it from being stuck.

As shown in Figures 1 to 7, when the ship unloader (crane) is started, the hoisting rope of the ship unloader rises upwards, driving the bucket opening rope 3 to tighten, and at the same time, the bucket closing rope 4 is relaxed. Next, the grab is opened. When it is fully opened, the grab is lowered into the bulk cargo cabin and placed on the bulk material to grab the material. The cable 4 is tightened upwards, driving a pair of movable pulleys 22 in the pair of buckets 11 to move closer to the middle, and the pair of buckets 11 are gradually closed. At the same time, the rope 3 for opening the bucket is in a loose state. Tight, therefore, the grab receives the effect of the closing force sent by the closed bucket rope 4 at this time, and the grab moves in an arc around the hinge point 13 and begins to excavate the material downwards. The grabbing force is obtained by combining with the pulley block. Therefore, as the two buckets 11 of the grab are closed, the closing force is continuously increasing. When the grab is completely closed, the wire rope of the ship unloader is lifted upwards. , lift the grab together with the cargo. Since the closing force of the traditional long strut grab is continuously reduced as the grab is closed, the utility model can grab more goods than the traditional long strut grab and can achieve high grabbing efficiency. Compare.

In summary, the utility model has a high grabbing ratio bulk cargo grab, which not only has a super large grabbing ratio, but also greatly reduces the dead load of the grab bucket; moreover, it has light weight and high structural strength, which greatly saves on overcoming the dead weight of the grab bucket. The energy consumed thus greatly improves the efficiency of ship unloading.

Although the content of the present invention has been described in detail through the above preferred embodiments, it should be recognized that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions of the present utility model will be obvious to those skilled in the art after reading the above content. Therefore, the protection scope of the present utility model should be defined by the appended claims.

Claims (9)

1. a high crawl is grabbed bucket than bulk goods, comprises the two symmetrically arranged bucket bodies of lobe (11), and described bucket body (11) comprises two blocks of bucket body side plates (111), bucket body base plate (112) and is arranged on wherein cramp bar; Correspondence supports two main muscle (12) of two lobe bucket bodies (11) respectively, and described two main muscle (12) intersect at hinge (13) and captive joint, and grab bucket is done circular motion around this hinge (13), it is characterized in that, also comprises:

Rope guide rack (5), described rope guide rack (5) is located to captive joint at hinge (13) with two main muscle (12);

A pair of movable pulley (22), described movable pulley (22) be arranged in corresponding bucket body (11) and with corresponding bucket body (11) in the cramp bar captive joint;

One splits bucket cable (3), described one split the bucket cable (3) corresponding one by one with two lobe bucket bodies (11) and main muscle (12), one first end of splitting bucket cable (3) is connected with the cable that hoists of the hoisting crane of outside respectively, and it is connected that its second end is walked around respectively the top of its corresponding movable pulley (22) and the main muscle (12) corresponding with it;

A pair of closed bucket rope cable (4), described a pair of closed bucket rope cable (4) is corresponding one by one with two lobe bucket bodies (11), the first end of a pair of closed bucket rope cable (4) is connected with the switching cable of the hoisting crane of outside, and after its second end is wound around some circles along two outside common tangents of a pair of movable pulley (22) respectively, the bucket body (11) corresponding with its place one side is connected.

2. high crawl as claimed in claim 1 is grabbed bucket than bulk goods, it is characterized in that, also comprise: a pair of angle pulley (7), described a pair of angle pulley (7) is corresponding one by one with a pair of closed bucket rope cable (4), closed bucket rope cable (4) is through angle pulley (7) commutation, and the starting point of two outside common tangents of its a pair of movable pulley of winding (22) is on the movable pulley (22) of opposite side bucket body (11).

3. high crawl as claimed in claim 1 is grabbed bucket than bulk goods, it is characterized in that, also comprise: four support roller devices (6), described four support roller devices (6) are arranged on rope guide rack (5), and each support roller device (6) correspondence is one by one held one and opened bucket cable (3) or closed bucket rope cable (4).

4. high crawl as claimed in claim 1 than the bulk goods grab bucket, is characterized in that, described closed bucket rope cable (4) is 2.5 along the number of turns of two outside common tangents windings of a pair of movable pulley (22).

5. high crawl as claimed in claim 1 than the bulk goods grab bucket, is characterized in that, the material of described bucket body (11) is alloy steel.

6. high crawl as claimed in claim 5 than the bulk goods grab bucket, is characterized in that, described bucket body (11) also comprises: cutting edge (113), described cutting edge (113) is welded to connect with bucket body (11).

7. high crawl as claimed in claim 6 than the bulk goods grab bucket, is characterized in that, the material of described cutting edge (113) is high strength steel.

8. high crawl as claimed in claim 1 than the bulk goods grab bucket, is characterized in that, described hinge (13) locates also to be provided with wear-resisting steel bushing.

9. high crawl as claimed in claim 1 than the bulk goods grab bucket, is characterized in that, describedly opens bucket cable (3) and closed bucket rope cable (4) is the steel wire cable.

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