Anti-skid device for crane load test bracket and load test bracket
By designing a limiting frame and limiting components on the crane load test bracket, the problem of complicated lifting operations for large and medium-sized lifting equipment was solved, and the safety and efficiency of load testing were improved.
Patent Information
- Application Number
- CN202520741257.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-18
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-04-18
AI Technical Summary
During load testing of large and medium-sized lifting equipment, the hoisting process is complicated, and the directional counterweight bracket has poor applicability, which can easily lead to instability of the load testing system and the falling of counterweights, affecting the safety and efficiency of the test.
Design an anti-slip device for a crane load test bracket, including a limiting frame and a limiting component. The limiting component is connected to the counterweight bracket to prevent the counterweight from sliding laterally and to limit the sling below, ensuring the stability of the sling and avoiding directional counterweight.
It improves the safety and efficiency of load testing, prevents instability of the load testing system and the falling of counterweights, and simplifies the load testing process.
Smart Images
Figure CN223920863U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lifting equipment technology, specifically to an anti-slip device for a crane load test bracket. Background Technology
[0002] Currently, large industrial plants are increasingly equipped with various large and medium-sized lifting equipment due to industrial production needs, with lifting capacities ranging from tens to hundreds of tons. Because of the large lifting capacity of these large and medium-sized lifting equipment, the hoisting of ultra-large tonnage counterweights is often a key factor restricting static and dynamic load tests during the overall load testing phase of installation. Furthermore, when conducting load tests on such large and medium-sized lifting equipment, the hoisting of the test counterweight often relies on placing the counterweight blocks using directional counterweight brackets. However, directional counterweight brackets have poor applicability, and the hoisting process is complex. Utility Model Content
[0003] To address the complex lifting process in existing crane load tests, this invention provides an anti-slip device and a load test bracket for crane load tests. This device prevents the counterweight from sliding left and right due to uneven force distribution, thus preventing instability in the load test system and the counterweight from falling off. This ensures the smooth conduct and safety of the load test. Furthermore, it eliminates the need for directional counterweights, simplifies the load test, and improves the efficiency of crane load tests.
[0004] This utility model is achieved through the following technical solution:
[0005] In a first aspect, this utility model provides an anti-slip device for a crane load test bracket, including a limiting frame, wherein each corner of the limiting frame is fitted with a limiting component, and the limiting component is used to connect to the corresponding part of the counterweight bracket; wherein, when the limiting component is connected to the counterweight bracket, the upper end of the limiting component protrudes from the corresponding counterweight bracket to limit the counterweight block on the counterweight bracket, and both ends of the counterweight bracket extend outside the limiting frame.
[0006] The anti-slip device for a crane load test bracket provided by this utility model includes a limiting frame, with limiting components adapted to each corner of the limiting frame. In use, each limiting component is connected to the corresponding part of the counterweight bracket, so that the limiting frame is connected to the counterweight bracket. At the same time, the upper end of the limiting component protrudes from the counterweight bracket. Thus, the upper end of the limiting component can laterally limit the counterweight block placed on the counterweight bracket, eliminating the need for directional counterweights, simplifying the load test, and improving the efficiency of crane load testing.
[0007] Meanwhile, with the limiting component connected to the counterweight bracket, and both ends of the counterweight bracket extending outside the limiting frame, during the load test, the slings are threaded under the counterweight bracket, with the two slings positioned on the corresponding side walls of the limiting frame and abutting against them. During lifting, the limiting frame limits the slings, fixing them below the counterweight bracket to prevent inward slippage and ensuring the stability of the lifting system. This also ensures the counterweight is positioned in the center of the counterweight bracket, preventing uneven force distribution that could cause the counterweight to slide left or right, leading to instability in the load test system and the counterweight falling off, thus ensuring the smooth and safe conduct of the load test.
[0008] In summary, the anti-slip device for crane load test bracket provided by this utility model can prevent the load test system from becoming unstable and causing the configuration blocks to fall off. It can also prevent the slings from sliding inward, thus ensuring the smooth progress and safety of the load test. Furthermore, it does not require directional counterweights, simplifies the load test, and improves the efficiency of crane load testing.
[0009] In an optional embodiment of this application, the limiting frame is a rectangular frame structure to ensure that the limiting frame can provide effective support for the two slings.
[0010] In an optional embodiment of this application, an inner support frame is further included. The inner support frame is installed inside the limiting frame and can provide lateral tensile and supporting forces to the limiting frame to ensure that the limiting frame has sufficient structural strength.
[0011] In an optional embodiment of this application, the inner support frame includes two inner support rods, which are arranged crosswise; wherein the two inner support rods are fixedly connected at their intersection, and the ends of the inner support rods are fixedly connected to the corners corresponding to the limiting frame, so as to ensure that the inner support frame can provide sufficient tension and support to the limiting frame.
[0012] In an optional embodiment of this application, the components of the limiting frame and the inner support frame are both channel steel or I-beams to ensure that the limiting frame and the inner support frame have sufficient rigidity and structural strength.
[0013] In an optional embodiment of this application, the inner support frame is welded to the limiting frame to ensure the reliability of the connection between the inner support frame and the limiting frame.
[0014] In an optional embodiment of this application, the limiting component includes: a connecting bolt, which passes through the corner of the limiting frame; and a limiting pressure block, which is movably sleeved on the shank of the connecting bolt. The nut fitted to the connecting bolt can press the limiting pressure block onto the corresponding part of the counterweight bracket, thereby connecting the limiting frame to the counterweight bracket. The limiting pressure block can also limit the position of the counterweight on the counterweight bracket, ensuring that while facilitating connection between the limiting frame and the counterweight bracket, it can also limit the position of the counterweight on the counterweight bracket.
[0015] In an optional embodiment of this application, the connecting bolt is a high-strength bolt to ensure that the connecting bolt has sufficient structural strength and rigidity.
[0016] Secondly, this utility model provides a crane load test bracket, including a counterweight bracket, wherein the counterweight bracket is connected to the aforementioned anti-slip device for crane load test brackets.
[0017] The crane load test bracket provided by this utility model has a counterweight bracket connected to the aforementioned anti-slip device for crane load test brackets. This device can prevent the load test system from becoming unstable and the configuration block from falling off. It can also prevent the sling from sliding inward, thus ensuring the smooth progress and safety of the load test. Furthermore, it does not require directional counterweights, making the load test simple and improving the efficiency of crane load testing.
[0018] Specifically, the length of the limiting frame is greater than 1 / 2 of the length of the counterweight bracket and less than the length of the counterweight bracket, so as to ensure that both ends of the counterweight bracket can extend outside the limiting frame.
[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects:
[0020] 1. The anti-slip device for a crane load test bracket provided by this utility model includes a limiting frame. Each corner of the limiting frame is fitted with a limiting component. In use, each limiting component is connected to the corresponding part of the counterweight bracket so that the limiting frame is connected to the counterweight bracket. At the same time, the upper end of the limiting component protrudes from the counterweight bracket. Thus, the upper end of the limiting component can laterally limit the counterweight block placed on the counterweight bracket. No directional counterweight is required, the load test is simple, and the efficiency of crane load testing can be improved.
[0021] 2. The anti-slip device for a crane load test bracket provided by this utility model, when the limiting component is connected to the counterweight bracket and both ends of the counterweight bracket extend outside the limiting frame, allows the slings to be threaded under the counterweight bracket during load testing. The two slings are positioned on the corresponding side walls of the limiting frame and abut against them. During lifting, the limiting frame limits the slings, fixing them below the counterweight bracket to prevent inward slippage and ensuring the stability of the lifting system. This also ensures the counterweight is positioned in the center of the counterweight bracket, preventing uneven force distribution that could cause lateral slippage, instability in the load test system, and the counterweight falling off, thus ensuring the smooth and safe conduct of the load test.
[0022] 2. The crane load test bracket provided by this utility model can prevent the load test system from becoming unstable and causing the configuration blocks to fall off. It can also prevent the slings from sliding inward, thus ensuring the smooth progress and safety of the load test. Furthermore, it does not require directional counterweights, making the load test simple and improving the efficiency of crane load testing. Attached Figure Description
[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0024] In the attached diagram:
[0025] Figure 1 A bottom view of the anti-slip device for a crane load test bracket provided in this application embodiment after assembly with the counterweight bracket;
[0026] Figure 2 This is a side view of the anti-slip device for a crane load test bracket provided in an embodiment of the present application, after the counterweight bracket is clamped.
[0027] Figure 3 A schematic diagram of the structure of the anti-slip device for the crane load test bracket provided in this application embodiment after clamping the middle part of the counterweight bracket;
[0028] Figure 4 This is a front view structural diagram of the working state of the crane load test bracket provided in the embodiments of this application;
[0029] Figure 5 This is a side view of the working state of the crane load test bracket provided in the embodiment of this application.
[0030] The attached figures include reference numerals and their corresponding component names:
[0031] 10-Limiting frame, 20-Limiting component, 21-Connecting bolt, 22-Limiting pressure block, 30-Counterweight bracket, 40-Inner support frame, 41-Inner support rod, 50-Counterweight block, 60-Sling. Detailed Implementation
[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0033] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0034] It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0035] In the description of the embodiments of this application, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this application is usually placed in when in use, or the orientation or positional relationship that is commonly understood by those skilled in the art. It is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.
[0036] In the description of this application, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0037] Example 1
[0038] Combination Figures 1-3 This embodiment provides an anti-slip device for a crane load test bracket, including a limiting frame 10. Each corner of the limiting frame 10 is fitted with a limiting component 20, which is used to connect to the corresponding part of the counterweight bracket 30. When the limiting component 20 is connected to the counterweight bracket 30, the upper end of the limiting component 20 protrudes from the corresponding counterweight bracket 30 to limit the counterweight block 50 on the counterweight bracket 30, and both ends of the counterweight bracket 30 extend outside the limiting frame 10.
[0039] Combined again Figure 1 The limiting frame 10 is a rectangular frame structure to ensure that the limiting frame 10 can provide effective support for the two slings.
[0040] This embodiment also includes an inner support frame 40, which is installed inside the limiting frame 10 and can provide lateral tensile and supporting forces to the limiting frame 10 to ensure that the limiting frame 10 has sufficient structural strength.
[0041] In this embodiment, the inner support frame 40 includes two inner support rods 41, which are arranged crosswise. The two inner support rods 41 are fixedly connected at their junction, and the ends of the inner support rods 41 are fixedly connected to the corresponding corners of the limiting frame 10, so as to ensure that the inner support frame 40 can provide sufficient tension and support force to the limiting frame 10.
[0042] It is understood that the components of the limiting frame 10 and the inner support frame 40 are all channel steel or I-beams to ensure that the limiting frame 10 and the inner support frame 40 have sufficient rigidity and structural strength.
[0043] Generally, the inner support frame 40 is welded to the limiting frame 10 to ensure the reliability of the connection between the inner support frame 40 and the limiting frame 10.
[0044] Specifically, the size of the limiting frame 10 is designed according to the size of the counterweight bracket 30. The width of the limiting frame 10 is 50-100mm wider than that of the counterweight bracket 30, and the length is not less than 1 / 2 and not more than 3 / 4 of the length of the counterweight bracket 30, so that there are sling hooks on both sides for lifting. Generally, the limiting frame 10 is a rectangular structure.
[0045] Accordingly, the size of the inner support frame 40 is determined based on the dimensions of the limiting frame 10. The arrangement principle is to place it along the two diagonals of the limiting frame 10, dividing the limiting frame 10 into four equilateral triangles. This ensures that the entire structure formed by the limiting frame 10 and the inner support frame 40 has sufficient structural strength to withstand the lateral load during the test. The vertical load is borne by the counterweight bracket 30; therefore, the vertical counterweight load is not considered in this embodiment.
[0046] The components of the limiting frame 10 and the inner support frame 40 are selected based on the static load test lifting capacity (1.25 times the rated lifting capacity) and the size of the counterweight block 50 bracket. The type of channel steel or I-beam needs to be calculated in advance based on the load size for the lifting equipment stress calculation. If channel steel is selected, the limiting frame 10 (the lateral support point of the sling) in the width direction of the limiting frame 10 should preferably be placed upright, and its support method is simply supported at both ends. In this case, when selecting channel steel, the maximum bending moment that the channel steel can withstand should be calculated based on the lateral load size to determine the size of the channel steel.
[0047] Combination Figure 2 and Figure 3 The limiting component 20 includes: a connecting bolt 21, which passes through the corner of the limiting frame 10; and a limiting pressure block 22, which is movably sleeved on the rod of the connecting bolt 21. The nut fitted to the connecting bolt 21 can press the limiting pressure block 22 onto the corresponding part of the counterweight bracket 30 to connect the limiting frame 10 to the counterweight bracket 30. The limiting pressure block 22 can also limit the counterweight block 50 on the counterweight bracket 30, ensuring that while facilitating the connection between the limiting frame 10 and the counterweight bracket 30, it can also limit the counterweight block 50 on the counterweight bracket 30.
[0048] For cranes, the connecting bolt 21 is a high-strength bolt to ensure that it has sufficient structural strength and rigidity. The selection of high-strength bolts is also determined according to the size of the lateral load. It is advisable to select 8.8s large hexagonal high-strength bolts. When assembling the bolts, first tighten them and then tighten them completely. The tightening torque during the final tightening should be strictly controlled in accordance with GB1231.
[0049] It should be noted that the anti-slip device for the crane load test bracket provided in this embodiment can be pre-assembled by the workshop using selected channel steel or I-beams according to the design drawings. The assembly principle is to first assemble the limiting frame 10, then assemble the inner support frame 40. After assembly, check the dimensions of the inner and outer frames and check for any twisting points. Welding can begin after confirmation. After welding, drill one bolt hole at each of the four corners of the limiting frame 10 and install four corresponding limiting pressure blocks 22, and connect them with four high-strength bolts.
[0050] The size of the bolt holes is generally determined based on the high-strength bolts selected. The limiting block 22 is generally made of steel plate, and the thickness of the steel plate used to make the limiting block 22 should not be less than 15mm.
[0051] It is understood that, based on the structure described in this embodiment, waste steel structure materials can be used for secondary processing, and it is detachable, which can greatly improve the material utilization rate and has the characteristics of simple manufacturing.
[0052] In summary, the anti-slip device for the crane load test bracket provided in this embodiment includes a limiting frame 10, and each corner of the limiting frame 10 is adapted to a limiting component 20.
[0053] Combination Figure 4 and Figure 5 In use, each limiting component 20 is connected to the corresponding part of the counterweight bracket 30 so that the limiting frame 10 is connected to the counterweight bracket 30. At the same time, the upper end of the limiting component 20 protrudes from the counterweight bracket 30. Thus, the upper end of the limiting component 20 can laterally limit the counterweight block 50 placed on the counterweight bracket 30. No directional counterweight is required, the load test is simple, and the efficiency of crane load test can be improved.
[0054] Meanwhile, with the limiting component 20 connected to the counterweight bracket 30, and both ends of the counterweight bracket 30 extending outside the limiting frame 10, during the load test, the slings are threaded under the counterweight bracket 30, with the two slings positioned on the corresponding side walls of the limiting frame 10 and abutting against them. During the lifting process, the limiting frame 10 limits the slings, fixing them below the counterweight bracket 30 to prevent them from sliding inward, thus ensuring the stability of the lifting system. This also ensures that the counterweight block 50 is located in the middle of the counterweight bracket 30, preventing the counterweight block 50 from sliding left and right due to uneven force, which could cause instability in the load test system or the counterweight block to fall, thus ensuring the smooth progress and safety of the load test.
[0055] In summary, the anti-slip device for the crane load test bracket provided in this embodiment can prevent the load test system from becoming unstable and causing the configuration blocks to fall off. It can also prevent the slings from sliding inward, thus ensuring the smooth progress and safety of the load test. Furthermore, it does not require directional counterweights, simplifies the load test, and improves the efficiency of crane load testing.
[0056] Example 2
[0057] Combination Figure 4 and Figure 5 This embodiment provides a crane load test bracket, including a counterweight bracket 30, wherein the counterweight bracket 30 is connected to an anti-slip device for a crane load test bracket as described in Embodiment 1.
[0058] Specifically, the length of the limiting frame 10 is greater than 1 / 2 of the length of the counterweight bracket 30 and less than the length of the counterweight bracket 30, so as to ensure that both ends of the counterweight bracket 30 can extend outside the limiting frame 10.
[0059] It should be understood that the ratio of the length of the regular rectangular anti-slip device to the length of the counterweight bracket 30 should be 1:2-3:5; while when the irregular counterweight bracket 30 is combined with the anti-slip device, the design principle of the anti-slip device is that after the centers of gravity of the two coincide, the length and width are determined according to the distance between the hanging points, and the length ratio should be 1:2-3:5.
[0060] In summary, the crane load test bracket provided in this embodiment, with the counterweight bracket 30 connected to the anti-slip device for the crane load test bracket described in Embodiment 1, can prevent the load test system from becoming unstable and causing the configuration block to fall, and can also prevent the sling from sliding inward, thus ensuring the smooth progress and safety of the load test. Furthermore, it does not require directional counterweights, the load test is simple, and it can improve the efficiency of the crane load test.
[0061] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.
Claims
1. An anti-skid device for a test carriage of a crane load, characterized in that, The limiting frame (10) is provided with a limiting assembly (20) at each corner, and the limiting assembly (20) is used to connect a corresponding part of the counterweight bracket (30); In the state that the limiting assembly (20) is connected with the counterweight bracket (30), the upper end of the limiting assembly (20) protrudes from the corresponding counterweight bracket (30) to limit the counterweight (50) on the counterweight bracket (30), and both ends of the counterweight bracket (30) extend outside the limiting frame (10).
2. An anti-slip device for a crane load test carriage according to claim 1, characterized in that, The limiting frame (10) is a rectangular frame structure.
3. Anti-slip device for a test carriage of a crane load according to claim 2, characterized in that An inner support frame (40) is further provided, which is installed inside the limiting frame (10) and can provide the limiting frame (10) with transverse pulling force and support force.
4. An anti-slip device for a crane load test carriage according to claim 3, characterised in that, The inner support frame (40) includes two inner support rods (41) arranged in cross. The two inner support rods (41) are fixedly connected at the intersection, and the end of the inner support rod (41) is fixedly connected with the corresponding corner of the limiting frame (10).
5. An anti-slip device for a crane load test carriage according to claim 3, characterized in that, The components of the limiting frame (10) and the inner support frame (40) are both channel steel or I-beam.
6. An anti-slip device for a crane load test carriage according to claim 3, characterised in that, The inner support frame (40) is welded with the limiting frame (10).
7. Anti-slip device for a load test carriage for a crane according to any one of claims 1-6, characterized in that, The limiting assembly (20) includes: A connecting bolt (21) is arranged at the corresponding corner of the limiting frame (10); A limiting pressing block (22) is movably sleeved on the rod of the connecting bolt (21); The nut matched with the connecting bolt (21) can press the limiting pressing block (22) on the corresponding part of the counterweight bracket (30) to connect the limiting frame (10) with the counterweight bracket (30), and the limiting pressing block (22) can limit the counterweight (50) on the counterweight bracket (30).
8. Anti-slip device for a test carriage of a crane load according to claim 7, characterized in that The connecting bolt (21) is a high-strength bolt.
9. A crane load test carriage, characterized by The counterweight bracket (30) is connected with the anti-skid device for the crane load test bracket according to any one of claims 1-8.
10. The crane load test carriage of claim 9, wherein, The length of the limiting frame (10) is greater than 1 / 2 of the length of the counterweight bracket (30) and less than the length of the counterweight bracket (30).