Full-semi-enclosed body weight for crawler crane

Abstract

The utility model discloses a full-semi-enclosed body weight for a crawler crane, which belongs to the technical field of balancing weights of crawler cranes and comprises a shell part, the shell part is of an upper opening structure and comprises a bottom plate, side coamings are arranged on the periphery of the bottom plate, a first concrete block is filled in the shell part, and a second concrete block is filled in the first concrete block. Second concrete blocks are smeared on the side faces and the upper faces of the parts, higher than the side coamings, of the first concrete blocks correspondingly, the second concrete blocks located on the side faces of the first concrete blocks are flush with the outer edges of the side coamings, and the strength of the second concrete blocks is larger than that of the first concrete blocks. The balancing weight is suitable for the crawler crane, the area of a steel shell can be reduced, the steel proportion is reduced, and cost is reduced.

Description

Technical Field

[0001] The utility model relates to a full and semi-enclosed body counterweight for a crawler crane, belonging to the technical field of counterweight blocks for crawler cranes. Background Art

[0002] Crawler cranes are an important category of lifting machinery. They have the advantages of high lifting performance, carrying loads, and adapting to complex environments. Therefore, they play an important role in infrastructure construction, wind power construction, nuclear power construction, petrochemical construction, etc. Counterweights are devices that increase the lifting weight and lifting torque of crawler cranes. Their weight directly affects the lifting performance of the entire machine and cannot be reduced at will. At present, the crane market is oriented by sales and price competition. How to reduce manufacturing costs is crucial. Each product and each component is also racking their brains to reduce costs. Reducing the cost of counterweights plays an important role in optimizing the cost of the entire machine. The cost of counterweights has been reduced step by step after the evolution of steel plate, cast iron, and filled types. If you want to further reduce the cost of filled counterweights, you need technological innovation breakthroughs.

[0003] like Figure 3 As shown in the figure, due to the positional relationship with the frame, most of the body weight is placed between the two track beams, mainly under the action of its own gravity, where A is the chassis and B is the fully enclosed body weight. Figure 4 As shown, the existing filled counterweight block structure is: long strip, with six sides all made of steel plates, and stiffeners are added inside according to force analysis, that is, the shell cavity is composed of six steel plates and internal stiffeners, and the cavity is filled with semi-fluid fillers or solid fillers. Fillers have different types and costs due to different densities. At present, the most cost-effective filler is filled concrete, but concrete has a low density. In order to ensure the weight requirement, the counterweight block needs to be large. At this time, the steel plate area must be increased, so there is a contradiction between the increase in steel plate cost and the reduction in filler cost. The current way to deal with this contradiction is to reduce the amount of steel plate used by reducing the thickness of the steel plate, but after the thickness of the steel plate is reduced to a certain extent, it is limited by the load-bearing and manufacturing process and cannot be further reduced. Therefore, the existing filled counterweight block with a full-enclosed shell and filler has the defects of a large steel shell area, a high proportion of steel, and a high cost. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a fully semi-enclosed body weight for a crawler crane, which can reduce the area of ​​the steel shell, reduce the proportion of steel, and achieve cost reduction.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A fully semi-enclosed body counterweight for a crawler crane comprises a shell portion, wherein the shell portion is an upper open structure, the shell portion comprises a bottom plate, and the bottom plate is provided with side panels on all sides thereof. The shell portion is filled with a first concrete block, and a portion of the first concrete block higher than the side panels is coated with a second concrete block on the side and top thereof respectively, the outer edge of the second concrete block located on the side of the first concrete block is flush with the outer edge of the side panels, and the strength of the second concrete block is greater than that of the first concrete block.

[0007] Two adjacent side panels are connected via an arc portion.

[0008] The shell part and the first concrete block are both in a rectangular parallelepiped shape.

[0009] An internal rib plate is arranged inside the shell part parallel to the width direction thereof, and a hanging point is arranged outside the side enclosure plate, wherein the hanging point is located at a contact position between the internal rib plate and the side enclosure plate.

[0010] The internal ribs and the side panels, as well as the hanging points and the side panels are connected by welding.

[0011] The number of the internal ribs is two, and the number of the hanging points is four.

[0012] The second concrete located on the side of the first concrete block has the same thickness as the second concrete located on the top of the first concrete block.

[0013] The strength grade of the first concrete block is C15, and the strength grade of the second concrete block is above C50.

[0014] Beneficial effects of the utility model: the utility model provides a fully and semi-enclosed body weight for a crawler crane, the shell part is an upper opening structure, the shell part is filled with a first concrete block, the part of the first concrete block higher than the side panel is coated with a second concrete block on the side and the top respectively, the existing fully enclosed steel plate shell is changed into a lower type, and the outer surface of the concrete block above the shell is coated with a high-strength concrete block to provide strength support, replacing the original steel plate shell part on the upper part, thereby reducing the steel shell area, reducing the proportion of steel, and achieving cost reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a crawler crane with a fully semi-enclosed body weighted but not filled with concrete;

[0016] Figure 2 It is a structural schematic diagram of a crawler crane with a full and semi-enclosed body weighted and filled with concrete;

[0017] Figure 3 It is a schematic diagram of the installation position structure of the vehicle body weight in the prior art;

[0018] Figure 4 It is a structural schematic diagram of a vehicle body weight in the prior art.

[0019] The reference numerals in the figure are as follows: 1-side panel; 2-internal rib plate; 3-bottom plate; 4-hanging point. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are not intended to limit the protection scope of the present invention.

[0021] Example 1

[0022] Figure 3 The installation method of the middle body counterweight determines that the bottom of the body counterweight is the main force point, and is affected by its own gravity and the impact force during walking, while the upper part is less stressed and basically plays a protective role. The utility model optimizes the form of the upper shell according to this actual force characteristic, specifically as follows Figure 1 and Figure 2 As shown, the utility model discloses a full and semi-enclosed body weight for a crawler crane, including a shell part, the shell part is an upper opening structure, the shell part includes a bottom plate 3, side panels 1 are arranged on all sides of the bottom plate 3, the shell part is filled with a first concrete block, and the part of the first concrete block higher than the side panels 1 is coated with a second concrete block on the side and the top respectively, the outer edge of the second concrete located on the side of the first concrete block is flush with the outer edge of the side panels 1, and the strength of the second concrete block is greater than that of the first concrete block.

[0023] The lifting body of the utility model is an upper opening structure, and the shell part is filled with a first concrete block. The part of the first concrete block higher than the side enclosure is coated with a second concrete block on the side and the top respectively, and the existing all-inclusive steel plate shell is changed into a lower type. The outer surface of the concrete block above the shell is coated with a high-strength concrete block to provide strength support, replacing the original steel plate shell part on the upper part, which can prevent the edges and corners of the counterweight block from being damaged by bumps during transportation, thereby reducing the area of ​​the steel shell, reducing the proportion of steel, and achieving cost reduction.

[0024] Example 2

[0025] like Figure 1 and Figure 2As shown, the utility model discloses a full and semi-enclosed body weight for a crawler crane, including a shell part, the shell part is an upper opening structure, the shell part includes a bottom plate 3, and side panels 1 are arranged on all sides of the bottom plate 3, and two adjacent side panels 1 are connected by an arc portion. The shell part is filled with a first concrete block, and the shell part and the first concrete block are both in the shape of a rectangular parallelepiped. The part of the first concrete block higher than the side panels 1 is coated with a second concrete block on the side and top, respectively, and the outer edge of the second concrete located on the side of the first concrete block is flush with the outer edge of the side panels 1, and the strength of the second concrete block is greater than that of the first concrete block. The strength grade of the first concrete block is C15, and the strength grade of the second concrete block is above C50. The second concrete located on the side of the first concrete block has the same thickness as the second concrete located on the top of the first concrete block.

[0026] An internal rib plate 2 is provided in the shell part parallel to its width direction, and a hanging point 4 is provided on the outside of the side panel 1. The hanging point 4 is located at the contact position between the internal rib plate 2 and the side panel 1. The internal rib plate 2 and the side panel 1, as well as the hanging point 4 and the side panel 1 are connected by welding. There are two internal rib plates 2 and four hanging points 4. The size design of the side panel 1 and the bottom plate 3, the internal rib plate 2, and the hanging point 4 is mainly obtained by force analysis.

[0027] The utility model introduces high-strength concrete protection on the five upper sides based on the concept of the existing filling-type counterweight block, which can greatly reduce the amount of plate shell, reduce the proportion of the plate, and reduce the cost.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A crawler crane with a full and semi-enclosed body weight, characterized in that: The invention comprises a shell part, wherein the shell part is an upper open structure, the shell part comprises a bottom plate (3), side panels (1) are arranged on the bottom plate (3) on all sides, the shell part is filled with a first concrete block, a portion of the first concrete block higher than the side panels (1) is coated with a second concrete block on the side and top respectively, and the outer edge of the second concrete block located on the side of the first concrete block is flush with the outer edge of the side panels (1).

2. The crawler crane full and half enclosed body ballast according to claim 1, characterized in that: Two adjacent side panels (1) are connected via an arc portion.

3. The crawler crane full and half enclosed body ballast according to claim 1, characterized in that: The shell part and the first concrete block are both in a rectangular parallelepiped shape.

4. The crawler crane full and half enclosed body ballast according to claim 3, characterized in that: An internal rib plate (2) is arranged inside the shell part parallel to the width direction thereof, and a hanging point (4) is arranged outside the side panel (1), wherein the hanging point (4) is located at a contact position between the internal rib plate (2) and the side panel (1).

5. The crawler crane full and half enclosed body ballast according to claim 4, characterized in that: The internal rib plate (2) and the side panel (1), as well as the hanging point (4) and the side panel (1) are connected by welding.

6. The crawler crane full and half enclosed body ballast according to claim 4, characterized in that: The number of the internal ribs (2) is two, and the number of the hanging points (4) is four.

7. The crawler crane full and half enclosed body ballast according to claim 1, characterized in that: The second concrete located on the side of the first concrete block has the same thickness as the second concrete located on the top of the first concrete block.

8. The crawler crane full and half enclosed body ballast according to claim 1, characterized in that: The strength grade of the first concrete block is C15, and the strength grade of the second concrete block is above C50.

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