Crane clamp for clamping prefabricated box girder

Abstract

The invention belongs to the field of prefabricated box girders, particularly relates to a crane clamp for clamping prefabricated box girders, and provides the following scheme aiming at the problems that an existing box girder hoisting tool is often difficult to adapt to box girders with different sizes and heights, hoisting tools of various specifications need to be prepared, and the cost and the operation complexity are increased. The box girder clamping device comprises a box girder body and two clamping assemblies, the two clamping assemblies are located at the two ends of the box girder body correspondingly and used for clamping the box girder body, and each clamping assembly comprises two upper pressing plates which are symmetrically arranged. The clamping assembly can flexibly adapt to box girder bodies with different longitudinal sizes and heights, the universality and adaptability of the clamping assembly are improved, it is ensured that the clamping assembly can stably clamp the box girder bodies in the hoisting process through the fact that the inserting rods are inserted into the side edge clamping grooves, the rectangular clamping grooves and the inserting grooves and through a locking mechanism of the clamping blocks and the clamping holes, and the clamping efficiency is improved. And slipping or shaking is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of prefabricated box girders, and in particular to a crane clamp used for clamping prefabricated box girders. Background Art

[0002] The box girders of reinforced concrete structures are divided into prefabricated box girders and cast-in-place box girders. The box girders prefabricated in an independent site can be erected in combination with a bridge erection machine after the completion of the lower project, which can speed up the progress of the project and save construction time; cast-in-place box girders are mostly used for large continuous bridges. At present, there are two main types of materials, one is prestressed reinforced concrete box girder, and the other is steel box girder. Among them, prestressed reinforced concrete box girders are constructed on-site. In addition to longitudinal prestress, some also have transverse prestress; steel box girders are generally processed in the factory and then transported to the site for installation. There are all-steel structures and some with reinforced concrete pavement layers.

[0003] Traditional box girder lifting tools are often difficult to adapt to box girders of different sizes and heights, resulting in the need to prepare lifting tools of various specifications, which increases costs and operational complexity. During the lifting process, if the clamping tools cannot stably clamp the box girder, it may cause the box girder to slip or shake, resulting in safety accidents. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that box girder lifting tools are often difficult to adapt to box girders of different sizes and heights, resulting in the need to prepare lifting tools of various specifications, increasing costs and operational complexity. During the lifting process, if the clamping tool cannot stably clamp the box girder, it may cause the box girder to slip or shake, causing safety accidents. A crane clamp for clamping prefabricated box girders is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A crane clamp for clamping a prefabricated box beam, comprising a box beam body and two clamping assemblies, wherein the two clamping assemblies are respectively located at two ends of the box beam body and are used to clamp the box beam body, wherein the clamping assembly comprises two symmetrically arranged upper pressing plates, wherein the two upper pressing plates are both located above the box beam body, and the same group of adjusting assemblies for adjusting the distance between the two upper pressing plates is arranged between the two upper pressing plates;

[0007] A main sleeve is fixedly connected to one side of the bottom of the upper pressure plate, a main inner rod is slidably penetrated inside the main sleeve, a second tension spring is fixedly connected between the top of the main inner rod and the top inner wall of the main sleeve, and a clamping mechanism for clamping the box beam body is provided on the outer wall of the main sleeve;

[0008] The clamping assembly also includes a side plate, which is located on one side of the box beam body. A brake assembly for braking the position of the upper pressure plate is provided on one side of the side plate.

[0009] In a possible design, the adjustment assembly includes an outer sleeve and an inner sleeve, and the ends of the outer sleeve and the inner sleeve that are away from each other are fixedly connected to one end of two upper pressure plates respectively, and the same first tension spring is fixedly connected between the inner wall of one side of the outer sleeve and one end of the inner sleeve.

[0010] In a possible design, the clamping mechanism includes a side plate slidably mounted on the outer wall of the main sleeve, one end of the side plate is fixedly connected to an inclined clamping plate, the inclined clamping plate is in contact with one side of the box beam body, a rectangular groove is opened inside the side plate, the rectangular groove is slidably connected to the main sleeve, a second spring is fixedly connected between one side of the main sleeve and one side inner wall of the rectangular groove, and a top block is fixedly connected to the top of the side plate.

[0011] In a possible design, the brake assembly includes two symmetrically arranged round rods fixedly connected to one side of the side plate, one end of the round rod is fixedly connected to a clamping block, one side of the upper pressure plate is provided with a transverse groove, one inner wall of one side of the transverse groove is provided with a plurality of clamping holes, the clamping block is engaged with the clamping hole, the interior of the transverse groove is slidably connected with a rectangular sleeve plate, one side of the rectangular sleeve plate is provided with a placement groove engaged with the clamping block, one end of the round rod slides through the rectangular sleeve plate, and the same first spring is fixedly connected between one side of the rectangular sleeve plate and one side of the side plate, and the first spring is sleeved on the outer wall of the round rod.

[0012] In a possible design, a rectangular support plate is fixedly connected to one side of the side panel, and two symmetrically arranged oblique support blocks are fixedly connected to one side of the side panel. Both the oblique support blocks and the rectangular support plate are used in conjunction with the box girder body, and the bottom of the oblique support block is in conflict with the top of the top block.

[0013] In a possible design, two symmetrically arranged insertion rods are fixedly connected to one side of the side panel, a plurality of insertion grooves are provided on one side of the main inner rod, a rectangular slot is provided on one side of the main sleeve, and a plurality of interconnected side slots are provided on the inner wall of one side of the rectangular slot, and the side slots, insertion slots and rectangular slots are all connected to the insertion rods.

[0014] In a possible design, the bottom of the main inner rod is fixedly connected to a bottom connecting rod, and one end of the bottom connecting rod is fixedly connected to a supporting bottom plate.

[0015] In a possible design, a hook is fixedly connected to the top of the upper pressing plate.

[0016] In the present application, when in use, two sets of clamping assemblies are placed on both sides of the box beam body, at which time the side plate abuts against one end of the box beam body, the rectangular support plate is inserted into the hole of the box beam body, and two oblique support blocks are supported on both sides of the bottom of the box beam body. At this time, the side plate cannot move further, and the upper pressure plate is away from the side plate;

[0017] At this time, the insertion rod is moved out from the inside of the main sleeve and the main inner rod, and the braking state of the main sleeve and the main inner rod can be released. At this time, the side plate moves laterally under the elastic force of the second spring, and then the side plate drives the oblique clamping plate to move laterally. The oblique clamping plate contacts one side of the box beam body and adapts to the longitudinal size of the box beam body.

[0018] At the same time, the main inner rod moves vertically upward under the tension of the second tension spring, and the main inner rod enters the interior of the main sleeve, and the main inner rod drives the insertion rod to move upward, and the insertion rod drives the support bottom plate to move upward, and the support bottom plate is against the bottom of the box beam body, so as to adapt to the height of the box beam body, and the top block can support the oblique support block to ensure stability;

[0019] At the same time, the clamping block moves from the corresponding clamping hole to the inside of the placement groove, and the braking state of the two upper pressure plates can be released at this time, and then the inner cylinder drives the two upper pressure plates to approach each other under the tension of the first tension spring, and the rectangular sleeve plate slides horizontally inside the transverse groove. When the two upper pressure plates are close to each other, the two main sleeves can be pressed against the two ends of the box beam body;

[0020] At this time, loosen the side panel, and insert the two insertion rods into the side slot, rectangular slot and insertion slot in turn, so as to ensure that the main sleeve and the main inner rod will not move further downward. At the same time, the card block enters the corresponding card hole to ensure that the spacing between the two horizontal slots will no longer change, and the box girder body can be hoisted by the hook.

[0021] Beneficial effects:

[0022] 1. Adaptability to height and size: This application can flexibly adapt to box beam bodies of different longitudinal sizes and heights through the lateral movement of the inclined clamping plate and the vertical movement of the main inner rod, thereby improving the versatility and adaptability of the clamping assembly.

[0023] 2. Stable clamping effect: By inserting the insertion rod into the side slot, rectangular slot and insertion slot, as well as the locking mechanism of the card block and the card hole, it is ensured that the clamping assembly can stably clamp the box girder body during the hoisting process to prevent slipping or shaking, thereby improving the safety of the hoisting operation.

[0024] 3. Convenient operability: The design of this application enables operators to quickly install and remove the clamping assembly without complicated adjustment steps, which improves work efficiency. At the same time, the automatic reset function of the spring simplifies the operation process and reduces the difficulty of operation.

[0025] 4. Enhanced structural stability: The support design of the top block to the oblique support block enhances the overall stability of the clamping assembly, enabling it to better resist external impact forces during the hoisting process, ensuring the safety and reliability of the hoisting operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the three-dimensional structure of a crane clamp for clamping prefabricated box beams proposed by the present invention;

[0027] Figure 2 A schematic diagram of the three-dimensional structure of a clamping assembly in a crane clamp for clamping a prefabricated box girder proposed by the present invention;

[0028] Figure 3 This is a schematic diagram of the exploded structure of a main inner rod and a main sleeve in a crane clamp for clamping a prefabricated box beam proposed by the present invention;

[0029] Figure 4 A schematic diagram of the three-dimensional structure of a side plate and a rectangular support plate in a crane fixture for clamping a prefabricated box girder proposed by the present invention;

[0030] Figure 5 A schematic diagram of the three-dimensional structure of a bottom connecting rod and a main sleeve in a crane clamp for clamping a prefabricated box beam proposed by the present invention;

[0031] Figure 6 The present invention provides a schematic diagram of the exploded structure of the side plates and main sleeves in a crane fixture for clamping prefabricated box girders.

[0032] In the figure: 1. box girder body; 2. main sleeve; 3. main inner rod; 4. bottom connecting rod; 5. side plate; 6. upper pressure plate; 7. outer sleeve; 8. supporting bottom plate; 10. oblique support block; 11. hook; 12. inner sleeve; 13. oblique clamping plate; 14. insertion rod; 15. clamping hole; 16. transverse groove; 17. first tension spring; 19. clamping block; 20. rectangular sleeve; 21. placement groove; 22. rectangular support plate; 23. first spring; 24. round rod; 25. rectangular groove; 26. side clamping groove; 28. side plate; 29. ​​top block; 30. rectangular clamping groove; 31. second spring; 32. second tension spring; 33. insertion groove. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] Example 1

[0035] Reference Figure 1-6, a crane clamp for clamping a prefabricated box girder, which is used in the field of prefabricated box girders, comprises: a box girder body 1 and two clamping assemblies, the two clamping assemblies are respectively located at the two ends of the box girder body 1 and are used to clamp the box girder body 1, the clamping assembly comprises two symmetrically arranged upper pressing plates 6, the two upper pressing plates 6 are both located above the box girder body 1, and the same group of adjusting assemblies for adjusting the distance between the two upper pressing plates 6 is arranged between the two upper pressing plates 6, the adjusting assembly comprises an outer sleeve 7 and an inner sleeve 12, the ends of the outer sleeve 7 and the inner sleeve 12 that are away from each other are respectively fixedly connected to one end of the two upper pressing plates 6, and the same first tension spring 17 is fixedly connected between the inner wall of one side of the outer sleeve 7 and one end of the inner sleeve 12;

[0036] A main sleeve 2 is fixedly connected to one side of the bottom of the upper pressure plate 6, and a main inner rod 3 is slidably penetrated inside the main sleeve 2. A second tension spring 32 is fixedly connected between the top of the main inner rod 3 and the top inner wall of the main sleeve 2. The outer wall of the main sleeve 2 is provided with a clamping mechanism for clamping the box beam body 1. The clamping mechanism includes a side plate 28 slidably sleeved on the outer wall of the main sleeve 2, and one end of the side plate 28 is fixedly connected to an oblique clamping plate 13, which is in conflict with one side of the box beam body 1. A rectangular groove 25 is provided inside the side plate 28, and the rectangular groove 25 is slidably connected to the main sleeve 2. A second spring 31 is fixedly connected between one side of the main sleeve 2 and one side inner wall of the rectangular groove 25, and a top block is fixedly connected to the top of the side plate 28 29, at this time, the insertion rod 14 is moved out from the inside of the main sleeve 2 and the main inner rod 3, and the braking state of the main sleeve 2 and the main inner rod 3 can be released. At this time, the side plate 28 moves laterally under the elastic force of the second spring 31, and then the side plate 28 drives the oblique clamping plate 13 to move laterally, and the oblique clamping plate 13 conflicts with one side of the box beam body 1 to adapt to the longitudinal size of the box beam body 1. At the same time, the main inner rod 3 moves vertically upward under the tension of the second tension spring 32, and the main inner rod 3 enters the inside of the main sleeve 2. The main inner rod 3 drives the insertion rod 14 to move upward, and the insertion rod 14 drives the support bottom plate 8 to move upward. The support bottom plate 8 is against the bottom of the box beam body 1, and then it can adapt to the height of the box beam body 1. The top block 29 can support the oblique support block 10 to ensure stability;

[0037] The clamping assembly also includes a side plate 5, which is located on one side of the box beam body 1. A brake assembly for braking the position of the upper pressure plate 6 is provided on one side of the side plate 5. The brake assembly includes two symmetrically arranged round rods 24 fixedly connected to one side of the side plate 5. One end of the round rod 24 is fixedly connected to a clamping block 19. A transverse groove 16 is provided on one side of the upper pressure plate 6. A plurality of clamping holes 15 are provided on the inner wall of one side of the transverse groove 16. The clamping block 19 is engaged with the clamping hole 15. A rectangular sleeve 20 is slidably connected to the inside of the transverse groove 16. A placement groove 21 engaged with the clamping block 19 is provided on one side of the rectangular sleeve 20. One end of the round rod 24 slides through the rectangular sleeve 20. The sleeve plate 20, one side of the rectangular sleeve plate 20 and one side of the side plate 5 are fixedly connected with the same first spring 23, the first spring 23 is sleeved on the outer wall of the round rod 24, one side of the side plate 5 is fixedly connected with a rectangular support plate 22, one side of the side plate 5 is fixedly connected with two symmetrically arranged oblique support blocks 10, the oblique support blocks 10 and the rectangular support plates 22 are both used in conjunction with the box beam body 1, the bottom of the oblique support blocks 10 is in conflict with the top of the top block 29, one side of the side plate 5 is fixedly connected with two symmetrically arranged insertion rods 14, one side of the main inner rod 3 is provided with a plurality of insertion grooves 33, one side of the main sleeve 2 is provided with a rectangular card slot 30, and the rectangular A plurality of interconnected side slots 26 are provided on the inner wall of one side of the slot 25. The side slots 26, the insertion slots 33 and the rectangular slots 30 are all engaged with the insertion rods 14. The two sets of clamping components are placed on both sides of the box beam body 1 respectively. At this time, the side plate 5 abuts against one end of the box beam body 1, the rectangular support plate 22 is inserted into the hole of the box beam body 1, and the two oblique support blocks 10 are supported on both sides of the bottom of the box beam body 1. At this time, the side plate 5 cannot move further. At this time, the upper pressing plate 6 is away from the side plate 5. At the same time, the block 19 moves from the corresponding clamping hole 15 to the inside of the placement slot 21. At this time, the braking state of the two upper pressing plates 6 can be released, and the locking block 19 can be locked. The inner tube 12 drives the two upper pressure plates 6 to approach each other under the tension of the first tension spring 17, and the rectangular sleeve plate 20 slides laterally inside the transverse groove 16. When the two upper pressure plates 6 are close to each other, the two main sleeves 2 can be pressed against the two ends of the box beam body 1. At this time, the side plates 5 are loosened, and the two insertion rods 14 are inserted into the side grooves 26, the rectangular grooves 30 and the insertion grooves 33 in turn, thereby ensuring that the main sleeves 2 and the main inner rods 3 will not continue to move downward. At the same time, the block 19 enters the corresponding hole 15 to ensure that the spacing between the two transverse grooves 16 will no longer change, and the box beam body 1 can be hoisted by the hook 11.

[0038] Example 2

[0039] refer to Figure 1-6 , improved on the basis of Example 1: the bottom of the main inner rod 3 is fixedly connected to the bottom connecting rod 4, one end of the bottom connecting rod 4 is fixedly connected to the supporting bottom plate 8, and the top of the upper pressure plate 6 is fixedly connected to the hook 11.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A crane clamp for clamping prefabricated box beams, characterized in that: include: A box beam body (1) and two clamping assemblies, wherein the two clamping assemblies are respectively located at two ends of the box beam body (1) and are used to clamp the box beam body (1), wherein the clamping assemblies include two symmetrically arranged upper pressing plates (6), wherein the two upper pressing plates (6) are both located above the box beam body (1), and a same group of adjustment assemblies for adjusting the spacing between the two upper pressing plates (6) are arranged between the two upper pressing plates (6); A main sleeve (2) is fixedly connected to one side of the bottom of the upper pressure plate (6), a main inner rod (3) is slidably penetrated inside the main sleeve (2), a second tension spring (32) is fixedly connected between the top of the main inner rod (3) and the top inner wall of the main sleeve (2), and a clamping mechanism for clamping the box beam body (1) is provided on the outer wall of the main sleeve (2); The clamping assembly further comprises a side plate (5), wherein the side plate (5) is located on one side of the box beam body (1), and a brake assembly for braking the position of the upper pressure plate (6) is provided on one side of the side plate (5).

2. A crane clamp for clamping prefabricated box beams according to claim 1, characterized in that: The adjustment assembly comprises an outer sleeve (7) and an inner sleeve (12), wherein the ends of the outer sleeve (7) and the inner sleeve (12) that are away from each other are fixedly connected to one end of two upper pressure plates (6), respectively, and a first tension spring (17) is fixedly connected between an inner wall of one side of the outer sleeve (7) and one end of the inner sleeve (12).

3. The crane clamp for clamping prefabricated box beams according to claim 1, characterized in that: The clamping mechanism comprises a side plate (28) slidably mounted on the outer wall of the main sleeve (2), one end of the side plate (28) is fixedly connected with an inclined clamping plate (13), the inclined clamping plate (13) is in contact with one side of the box beam body (1), a rectangular groove (25) is provided inside the side plate (28), the rectangular groove (25) is slidably connected with the main sleeve (2), a second spring (31) is fixedly connected between one side of the main sleeve (2) and one side inner wall of the rectangular groove (25), and a top block (29) is fixedly connected to the top of the side plate (28).

4. The crane clamp for clamping prefabricated box beams according to claim 1, characterized in that: The brake assembly comprises two symmetrically arranged round rods (24) fixedly connected to one side of the side plate (5), one end of the round rod (24) being fixedly connected with a clamping block (19), one side of the upper pressure plate (6) being provided with a transverse groove (16), one side inner wall of the transverse groove (16) being provided with a plurality of clamping holes (15), the clamping block (19) being clamped with the clamping holes (15), the interior of the transverse groove (16) being slidably connected with a rectangular sleeve plate (20), one side of the rectangular sleeve plate (20) being provided with a placement groove (21) being clamped with the clamping block (19), one end of the round rod (24) being slidably passed through the rectangular sleeve plate (20), one side of the rectangular sleeve plate (20) being fixedly connected with a first spring (23) with respect to one side of the side plate (5), the first spring (23) being sleeved on the outer wall of the round rod (24).

5. The crane clamp for clamping prefabricated box beams according to claim 1, characterized in that: A rectangular support plate (22) is fixedly connected to one side of the side plate (5), and two symmetrically arranged oblique support blocks (10) are fixedly connected to one side of the side plate (5). Both the oblique support blocks (10) and the rectangular support plate (22) are used in conjunction with the box beam body (1), and the bottom of the oblique support block (10) is in conflict with the top of the top block (29).

6. The crane clamp for clamping prefabricated box beams according to claim 3, characterized in that: One side of the side plate (5) is fixedly connected to two symmetrically arranged insertion rods (14); one side of the main inner rod (3) is provided with a plurality of insertion grooves (33); one side of the main sleeve (2) is provided with a rectangular clamping groove (30); one side inner wall of the rectangular groove (25) is provided with a plurality of interconnected side clamping grooves (26); the side clamping grooves (26), the insertion grooves (33) and the rectangular clamping grooves (30) are all clamped with the insertion rod (14).

7. The crane clamp for clamping prefabricated box beams according to claim 1, characterized in that: The bottom of the main inner rod (3) is fixedly connected to a bottom connecting rod (4), and one end of the bottom connecting rod (4) is fixedly connected to a supporting bottom plate (8).

8. The crane clamp for clamping prefabricated box beams according to claim 1, characterized in that: A hook (11) is fixedly connected to the top of the upper pressing plate (6).

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