Counterweight method for crane load hoisting experiment

Abstract

According to the counterweight method for the crane load hoisting experiment, the hoisting tool is arranged, and the hoisting tool is provided with the multiple hoisting belt connecting parts capable of being used for hoisting the water bags, so that the multiple water bags can be hoisted by the hoisting hook at the same time, and if the number of the water bags needs to be increased, the hoisting efficiency is improved. The number of the water bags can be increased or decreased according to the weight requirement of a crane full-load experiment, so that it is guaranteed that different experiment requirements can be met, the water bags are in flexible contact, in this way, even if the water bags collide, the water bags only deform and are attached to one another, and the water bags are prevented from being damaged. And the problem of rigid collision is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of crane load experiments, and in particular to a counterweight method for a crane load hoisting experiment. Background Art

[0002] During the shipbuilding process, cranes undergo static and dynamic load testing during the post-installation commissioning phase. Typically, these tests are performed using counterweights based on the crane's load conditions to verify the crane's structural strength, rigidity, mechanical properties, and safety. During load testing, cranes with different safe working loads require the use of loads of corresponding weights as their test loads. Due to the wide variety of crane types, the tonnage of the cranes involved varies significantly.

[0003] A device for crane load testing is disclosed in a patent document with Chinese patent application number 201920644139.8 and publication date 2019.12.20. The document implements crane tests with different loads by placing counterweights on a base. However, as in the prior art of the document, it copes with different load tests by continuously adding counterweights. For cranes with larger loads, this method requires adding a very large number of counterweights, which easily increases the cost of the experiment.

[0004] A Chinese patent application with the number 201822033918.2 and the publication date of October 22, 2019, discloses a counterweight water tank structure for load testing. The document increases the weight by injecting water into the water tank.

[0005] However, in the technology of the document, the water container is a box. If the weight of the water in this box cannot reach the required load weight, another water tank will need to be added. If the boxes collide with each other during lifting, it will easily lead to accidents. In addition, the contact between the boxes is rigid. If multiple boxes are hung on the hook together, it will easily cause the boxes to tilt or it will be difficult to connect multiple boxes to the hook at the same time. Summary of the Invention

[0006] The present invention provides a counterweight method for a crane load lifting experiment. By arranging a lifting tool, a hook can lift multiple water bags at the same time, and each water bag is in flexible contact with each other, thereby avoiding collision accidents.

[0007] To achieve the above objectives, the technical solution of the present invention is: a counterweight method for a crane load hoisting test, implemented by a hoisting fixture, the hoisting fixture including one or more hoisting rods, including a first hoisting rod and a second hoisting rod, with fixed lifting ears provided above both ends of the first hoisting rod and the second hoisting rod, connected to the fixed lifting ears and used to hang the hoisting fixture on the hook; and the water bag is connected to the bottom of the first hoisting rod and the second hoisting rod via a sling. The specific steps include: (1) Hang the lifting tool on the hook of the boom through the lifting cable.

[0008] (2) Connect one end of the sling to the sling connection part of the lifting tool.

[0009] (3) Connect one or more water bags to the slings via water bag cables according to the full load weight of the crane.

[0010] (4) A first layer of water bags is formed by hanging a water bag on each sling connected to the sling connecting part.

[0011] (5) If the weight of the first layer of water bags has not yet reached the full load weight of the crane, test.

[0012] (6) A second water bag cable is arranged on the sling, one end of the second water bag cable is connected to the sling, and the other end of the second water bag cable extends downward along the outer side of the first layer of water bag and exceeds the bottom end of the first layer of water bag.

[0013] (7) A water bag is placed on the other end of the second water bag cable.

[0014] (8) A water bag is arranged on the second water bag cable to form a second water bag layer, and the second water bag layer is located below the first water bag layer.

[0015] (9) Repeat steps (6) to (8) according to the full load weight of the crane and continue to set water bags under the second layer of water bags until the number of water bags is sufficient for the full load test of the crane.

[0016] The above method sets up a lifting tool, and the lifting tool is provided with multiple sling connecting parts that can be used to lift water bags, so that the hook can lift multiple water bags at the same time. If the number of water bags needs to be increased, the water bags can be further added downward through the water bag cable. The number of water bags can be increased or decreased according to the weight requirement of the full load test of the crane, thereby ensuring that different experimental needs can be met, and each water bag is in flexible contact. In this way, even if the water bags collide, they will only deform and fit each other, and there will be no problem of rigid collision.

[0017] Furthermore, a connecting rod is hinged between one end of the first hoisting rod and one end of the second hoisting rod and between the other end of the first hoisting rod and the other end of the second hoisting rod. One or more sling connecting parts are provided below the two ends of the first hoisting rod and the second hoisting rod, and a sling is provided on the sling connecting part, and the sling is used to hoist the water bag; hinged plates are provided at both ends of the hoisting rod, and adjacent hoisting rods are hinged through the hinged plates.

[0018] The above arrangement facilitates fixing the first hoisting rod and the second hoisting rod by the connecting rod, and facilitates installation of the sling by providing the sling connecting component.

[0019] Furthermore, the sling connecting component includes a sling connecting seat and a sling connecting shaft. The sling connecting seat is fixed below the lifting rod. The sling connecting shaft is provided on the sling connecting seat, and the sling is set on the sling connecting shaft.

[0020] The above arrangement facilitates fixed connection of the sling by providing the sling connecting component.

[0021] Furthermore, one end of the sling is connected to the sling connecting shaft, and a shackle is provided at the other end of the sling, and a water bag cable is connected to the shackle.

[0022] The above arrangement facilitates the installation and disassembly of the water bag cable by providing a shackle.

[0023] Furthermore, step (3) specifically includes setting a shackle on the sling, and the water bag is detachably mounted on the shackle via a water bag cable.

[0024] The above arrangement facilitates installation and disassembly of the water bag cable through the shackle.

[0025] Furthermore, a tension gauge is provided between the shackle and the sling.

[0026] The above setting is convenient for recording the weight of the water bag through the dynamometer, which is convenient for the load lifting test of the crane.

[0027] Furthermore, step (10) specifically includes injecting water into the water bag through a water inlet pipe at the bottom of the water bag through a submersible pump.

[0028] With the above arrangement, the water bag is filled with water through a submersible pump, thereby being able to control the weight of the water bag.

[0029] Furthermore, step (7) specifically includes providing a second shackle on the other end of the second water bag cable, and the water bag is detachably mounted on the second shackle.

[0030] Step (8) specifically includes arranging a water bag on the second shackle and forming a second water bag layer.

[0031] The above arrangement, by providing the second shackle, makes it easy to disassemble and install the second water bag layer.

[0032] Furthermore, after step (9), the method further includes: step (10) after the water bag is set, water is injected starting from the first water bag layer until the weight of the water bag meets the full load test of the crane.

[0033] The above arrangement reduces the weight of the water bag during hoisting by filling it with water after hoisting, thus facilitating the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the connection between the lifting tool and the hook of the present invention.

[0035] Figure 2 This is a schematic diagram of the water bag of the present invention being hoisted on a hook.

[0036] Figure 3 It is a side view of the lifting tool of the present invention.

[0037] Figure 4 for Figure 2 Enlarged view of point A in the middle.

[0038] Figure 5 It is the workflow diagram of the present invention. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] like Figure 1-Figure 4 As shown, a lifting tool comprises one or more lifting rods 2, wherein the lifting rods 2 comprise a first lifting rod 21 and a second lifting rod 22, and a connecting rod 23 is hinged between one end of the first lifting rod 21 and one end of the second lifting rod 22 and between the other end of the first lifting rod 21 and the other end of the second lifting rod 22, and a fixed lifting ear 24 is provided above both ends of the first lifting rod 21 and the second lifting rod 22, and a lifting cable 02 for hanging the lifting tool 1 on the hook 01 is connected to the fixed lifting ear 24; one or more sling connecting parts 25 are provided below both ends of the first lifting rod 21 and the second lifting rod 22, and a sling 03 is provided on the sling connecting part 25, and the sling 03 is used to lift the water bag 04; a hinged plate 26 is provided at both ends of the lifting rod 2, and adjacent lifting rods 2 are hinged by the hinged plate 26.

[0041] like Figure 2 and Figure 3As shown, the sling connection component 25 includes a sling connection seat 251 and a sling connection shaft 252. The sling connection seat 251 is fixed below the lifting rod 2, and a sling connection shaft 252 is provided on the sling connection seat 251. The sling 03 is set on the sling connection shaft 252. By providing the sling connection component, it is convenient to fix the sling.

[0042] like Figure 2-Figure 4 As shown, one end of the sling 03 is connected to the sling connecting shaft 252, and a shackle 05 is provided at the other end of the sling 03, and a water bag cable (not shown in the figure) is connected to the shackle 05. By providing the shackle 05, it is convenient to install and remove the water bag cable.

[0043] A dynamometer 07 is provided between the shackle 05 and the sling 03. The dynamometer 07 is used to record the weight of the water bag 04 and facilitate the load lifting test of the crane.

[0044] As 2 and Figure 5 As shown, a counterweight method for a crane load hoisting experiment includes the following steps: (1) Hang the lifting tool on the hook 01 of the boom through the lifting cable 02.

[0045] (2) Connect one end of the sling 03 to the sling connecting part 25 of the lifting tool.

[0046] (3) Connect one or more water bags 04 to the sling 03 via the water bag rope 06 according to the full load weight of the crane.

[0047] Specifically, the shackle 05 is arranged on the sling 03, and the water bag 04 is detachably installed on the shackle 05 through a water bag cable.

[0048] (4) A water bag 04 is hung on each sling 03 connected to the sling connecting part 25 to form the first water bag layer 001.

[0049] (5) If the weight of the first layer of water bag layer 001 has not reached the full load weight test of the crane, proceed to step (6); if the weight of the first layer of water bag layer 001 reaches the full load weight test of the crane, proceed to step (10).

[0050] (6) A second water bag cable 06 is provided on the sling 03 , one end of the second water bag cable 06 is connected to the sling 03 , and the other end of the second water bag cable 06 extends downward along the outer side of the first layer of water bag 04 and exceeds the bottom end of the first layer of water bag 04 .

[0051] (7) A second shackle 08 is provided on the other end of the second water bag cable 06 , and the water bag 04 can be detachably mounted on the second shackle 08 .

[0052] (8) A water bag 04 is arranged on the second shackle 08 to form a second water bag layer 002 , and the second water bag layer 002 is located below the first water bag layer 001 .

[0053] (9) Repeat steps (6) to (8) according to the full load weight of the crane and continue to set water bags 04 below the second water bag layer 002 until the number of water bags 04 is sufficient for the full load test of the crane.

[0054] (10) After the water bag 04 is set up, water is injected into the water bag 04 from the water inlet pipe at the bottom of the water bag 04 through a submersible pump starting from the first water bag layer 001 until the weight of the water bag 04 meets the full load test of the crane.

[0055] In this embodiment, before step (10), the water bag is an empty water bag. After the empty water bag is set, the water bag is filled with water. The capacity of each water bag is the same. Before step (10), it specifically includes determining the required capacity of water according to the load weight of the load test to be performed by the current crane, and then determining the number of water bags, thereby ensuring that the number of water bags hoisted can be achieved according to the load weight of the crane, so as not to waste manpower and material resources.

[0056] The working principle of the present invention is as follows: by setting up a lifting tool, and the lifting tool is provided with multiple lifting strap connecting parts 25 that can be used to lift the water bags 04, so that the hook 01 can lift multiple water bags 04 at the same time, and if the number of water bags 04 needs to be increased, the water bags 04 can be continued to be added downward through the water bag cable. The number of water bags 04 can be increased or decreased according to the weight requirements of the full load test of the crane, thereby ensuring that different experimental needs can be met, and each water bag 04 is in flexible contact with each other. In this way, even if the water bags 04 collide, they will only deform and fit each other, and there will be no problem of rigid collision.

Claims

1. A weight counterweight method for a crane load hoisting experiment, implemented by a hoisting tool, characterized in that: The lifting tool comprises more than one lifting rod, and the lifting rod comprises a first lifting rod and a second lifting rod, and fixed lifting ears are provided above both ends of the first lifting rod and the second lifting rod, and a lifting cable for hanging the lifting tool on the hook is connected to the fixed lifting ears; The first hoisting rod and the second hoisting rod are connected to the water bag through a sling below both ends. The specific steps include: (1) Hang the lifting tool on the hook of the boom through the lifting cable; (2) Connect one end of the sling to the sling connection part of the lifting tool; (3) Connect one or more water bags to the slings through water bag cables according to the full load weight of the crane; (4) A water bag is hung on each sling connected to the sling connecting part to form a first layer of water bags; (5) If the weight of the first layer of water bags has not reached the full load weight of the crane; (6) A second water bag cable is arranged on the sling, one end of the second water bag cable is connected to the shackle, and the other end of the second water bag cable extends downward along the outer side of the first layer of water bag and exceeds the bottom end of the first layer of water bag; (7) Arrange a water bag on the other end of the second water bag cable; (8) Arranging a water bag on the second water bag cable to form a second water bag layer, wherein the second water bag layer is located below the first water bag layer; (9) Repeat steps (6) to (8) according to the full load weight of the crane and continue to place water bags under the second layer of water bags until the number of water bags is sufficient for the full load test of the crane.

2. A weight counterweight method for a crane load hoisting experiment according to claim 1, characterized in that: A connecting rod is hinged between one end of the first hoisting rod and one end of the second hoisting rod and between the other end of the first hoisting rod and the other end of the second hoisting rod. One or more sling connecting parts are provided below the two ends of the first hoisting rod and the second hoisting rod. A sling is provided on the sling connecting part, and the sling is used to hoist the water bag. Hinge plates are provided at both ends of the hoisting rod, and adjacent hoisting rods are hinged through the hinge plates.

3. The weight counterweight method for crane load hoisting experiment according to claim 1, characterized in that: The sling connection component comprises a sling connection seat and a sling connection shaft. The sling connection seat is fixed below the lifting rod. The sling connection shaft is arranged on the sling connection seat, and the sling is arranged on the sling connection shaft.

4. A weight counterweight method for crane load hoisting experiment according to claim 3, characterized in that: One end of the sling is connected to the sling connecting shaft, and the other end of the sling is provided with a shackle, and the shackle is connected with a water bag cable.

5. A weight counterweight method for crane load hoisting experiment according to claim 4, characterized in that: Step (3) specifically includes setting a shackle on the sling, and the water bag is detachably mounted on the shackle via a water bag cable.

6. The weight counterweight method for crane load hoisting experiment according to claim 4, characterized in that: A tension gauge is provided between the shackle and the sling.

7. The weight counterweight method for crane load hoisting experiment according to claim 1, characterized in that: Step (10) specifically includes injecting water into the water bag from a water inlet pipe at the bottom of the water bag through a submersible pump.

8. The weight counterweight method for crane load hoisting experiment according to claim 1, characterized in that: Step (7) specifically includes providing a second shackle on the other end of the second water bag cable, and the water bag is detachably mounted on the second shackle; Step (8) specifically includes arranging a water bag on the second shackle and forming a second water bag layer.

9. The weight counterweight method for crane load hoisting experiment according to claim 1, characterized in that: After step (9), the method further includes: step (10) after the water bag is set, water is injected starting from the first water bag layer until the weight of the water bag meets the full load test of the crane.

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