A steel pipe clamp

Abstract

The utility model discloses a steel pipe clamp belongs to loading truck accessory technical field. A steel pipe clamp, including fork frame assembly, fork assembly, clamping arm subassembly and hydraulic control element, wherein, the clamping arm subassembly includes upper clamping arm subassembly and lower clamping arm subassembly, one end of upper clamping arm subassembly is rotatably connected with fork frame assembly, the other end of upper clamping arm is rotatably connected with one end of lower clamping arm subassembly, and the other end of lower clamping arm is free end and is towards fork assembly. The utility model discloses through the design of improvement clamping arm, guarantees when loading and unloading, and clamping arm can force clamping to goods, avoids the goods rolling, and the security when lifting the safety of accessory loading and unloading cylindrical material is promoted.

Description

Technical Field

[0001] This utility model relates to the field of loading vehicle attachments technology, and in particular to a steel pipe clamp. Background Technology

[0002] When loaders handle cylindrical goods such as steel pipes, the lack of a device to secure the cylinder with the forks allows the goods to easily roll during transport, compromising safety. Although some pipe clamps use clamping arms to limit the rolling of the goods, the existing arm design only reduces the rolling range; the goods are still not properly clamped during transport. This results in insufficient clamping when handling single steel pipes or small parts, posing a continued safety hazard. Utility Model Content

[0003] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention may be realized and obtained by means of the structures particularly pointed out in the description and other accompanying drawings.

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a steel pipe clamp. This invention improves the design of the clamping arm, ensuring that the clamping arm can apply force to hold the goods during loading and unloading, preventing the goods from rolling and improving the safety of the attachment when loading and unloading cylindrical materials.

[0005] To achieve the above objectives, the technical solution of this utility model is: a steel pipe clamp, comprising: Fork carriage assembly; A fork assembly disposed on the front side of the fork carriage assembly; A clamping arm assembly is disposed on the front side of the fork carriage assembly and above the fork assembly; Hydraulic control elements are used to control the movement of the fork assembly and the clamping arm assembly; The clamping arm assembly includes an upper clamping arm assembly and a lower clamping arm assembly. One end of the upper clamping arm assembly is rotatably connected to the fork carriage assembly, and the other end of the upper clamping arm assembly is rotatably connected to one end of the lower clamping arm assembly. The other end of the lower clamping arm assembly is a free end and faces the fork carriage assembly.

[0006] This invention improves the structure of the clamping arm and uses hydraulic control components to control the clamping arm, ensuring that the load is continuously pressed on the forks during loading and unloading, preventing the cylindrical load from rolling on the forks and improving safety performance.

[0007] In some embodiments, the hydraulic control element includes a first clamping arm clamping cylinder and a second clamping arm clamping cylinder. The first clamping arm clamping cylinder controls the clamping movement of the upper clamping arm assembly, and the second clamping arm clamping cylinder controls the clamping movement of the lower clamping arm assembly. This invention employs dual sets of cylinders to precisely control the opening and closing of the clamping arms, ensuring that the load is continuously and stably pressed against the forks during loading and unloading, effectively preventing cylindrical loads from rolling on the forks, thereby significantly improving the safety performance of the equipment.

[0008] In some embodiments, the fixed end of the first clamping arm cylinder is connected to the fork carriage assembly, the movable end of the first clamping arm cylinder is connected to the upper clamping arm assembly, the fixed end of the second clamping arm cylinder is connected to the upper clamping arm assembly, and the movable end of the second clamping arm cylinder is connected to the lower clamping arm assembly. This invention combines the connection method of the first clamping arm cylinder to the fork carriage assembly and the upper clamping arm assembly with the connection method of the second clamping arm cylinder to the upper clamping arm assembly and the lower clamping arm assembly, forming a linked clamping arm drive structure. This allows the upper and lower clamping arm assemblies to coordinate their movements under hydraulic drive. When the first clamping arm cylinder extends or retracts, it directly drives the upper clamping arm assembly to perform clamping motion around the rotation point of the fork carriage assembly. Simultaneously, the second clamping arm cylinder adjusts its position with the movement of the upper clamping arm assembly and further controls the clamping angle of the lower clamping arm assembly through its own extension and retraction, thereby achieving adaptive clamping of cylindrical loads of different sizes. This linkage control method not only improves the coordination and flexibility of the clamping arm movement, but also automatically adjusts the clamping force according to the actual size of the load, ensuring that a stable clamping state is maintained no matter how the load diameter changes during loading and unloading, further enhancing the adaptability and safety reliability of the equipment under complex working conditions.

[0009] In some embodiments, the hydraulic control element includes a fork lateral movement cylinder disposed on the fork carriage assembly, the fork lateral movement cylinder being used to control the displacement movement of the fork assembly. This invention, by incorporating a fork lateral movement cylinder to adjust the spacing and position of the forks, allows the fork assembly to be laterally adjusted according to the length or stacking position of the cylindrical load, further enhancing the equipment's adaptability to steel pipes of different specifications or cylindrical loads. When clamping long steel pipes, the fork lateral movement cylinder can drive the fork assembly to move to both sides, increasing the fork spacing to accommodate the load length; if there is a deviation in the load stacking position, precise alignment can also be achieved by adjusting the fork position, avoiding problems such as unstable clamping or load slippage caused by improper fork positioning.

[0010] In some embodiments, the hydraulic control element includes a solenoid valve and a hydraulic lock. This invention, by configuring a solenoid valve and a hydraulic lock, achieves precise control of the cylinder's oil circuit and pressure holding, thereby stabilizing the cylinder pressure and ensuring that the force on the material is not affected by fluctuations in the hydraulic system pressure, thus improving operational safety.

[0011] In some embodiments, the upper clamping arm assembly includes an upper left clamping arm and an upper right clamping arm, and the lower clamping arm assembly includes a lower left clamping arm and a lower right clamping arm. One end of the upper left clamping arm is rotatably connected to the fork carriage assembly, and the other end of the upper left clamping arm is rotatably connected to one end of the lower left clamping arm. The other end of the lower left clamping arm is a free end and faces the fork carriage assembly. This invention forms two sets of symmetrical lever structures by rotatably connecting the upper left and upper right clamping arms to the fork carriage assembly, and correspondingly rotatably connecting the upper left and lower left clamping arms, and the upper right and lower right clamping arms, respectively. This allows the clamping arm assembly to open and close around the rotational connection point under hydraulic drive, thereby achieving stable clamping of cylindrical loads. When the hydraulic control element drives the clamping arm assembly to move, the upper left clamping arm and the lower left clamping arm, as well as the upper right clamping arm and the lower right clamping arm, will work together. Their free ends will move closer to each other to clamp the load, or move further apart to release the load. Through the lever principle, the clamping force is effectively amplified, improving the clamping effect on steel pipes or cylindrical loads of different diameters. At the same time, this symmetrical structure can also ensure that the load is evenly stressed, avoiding load shift or damage due to excessive force on one side.

[0012] In some embodiments, a reinforcing rod is provided between the upper left clamping arm and the upper right clamping arm. This invention, by providing a reinforcing rod to connect the left and right clamping arms, can further improve the overall structural rigidity and stability of the clamping arm assembly, preventing relative deformation or swaying of the left and right clamping arms due to excessive force during clamping. The two ends of the reinforcing rod are fixedly connected to the upper left and upper right clamping arms respectively, forming a transverse support structure. This organically combines two sets of symmetrical lever structures into a single frame, ensuring that when the left clamping arm is under force, the force can be transmitted to the right clamping arm through the reinforcing rod, and vice versa. This ensures the synchronicity and consistency of the movement of the left and right clamping arms, avoiding the impact of clamping accuracy due to deformation of one side of the clamping arm. Simultaneously, the reinforcing rod can also disperse stress concentration in the clamping arm assembly under load, enhancing the fatigue resistance of the clamping arm assembly and extending the service life of the equipment. Especially when clamping heavy or large-diameter cylindrical loads, the reinforcing rod effectively improves the load-bearing capacity and operational safety of the entire steel pipe clamp.

[0013] In some embodiments, there are at least two reinforcing rods.

[0014] In some embodiments, the fork assembly includes a left fork, a right fork, and a guide rod, the guide rod being disposed on the fork carriage assembly, and both the left and right forks being disposed on the guide rod. This invention, by disposing the left and right forks on the guide rod and indirectly on the fork carriage assembly, enables the left and right forks to move stably on the guide rod.

[0015] In some embodiments, the forklift assembly includes a frame assembly and a hook assembly disposed on the frame assembly.

[0016] The working principle of this utility model is as follows: The solenoid valve is controlled to retract the first clamping arm cylinder, thereby causing the upper clamping arm assembly to move upward. At the same time, the second clamping arm cylinder retracts, causing the lower clamping arm assembly to move upward and flatten to its limit position below the upper clamping arm assembly. At this point, the fork assembly picks up the material. The solenoid valve is then controlled to open the first clamping arm cylinder, causing the upper and lower clamping arm assemblies to open and press the material down. The second clamping arm cylinder continues to open, further adjusting the angle of the clamping mechanism and applying force to press the material down to prevent it from rolling. At the same time, the hydraulic lock maintains pressure, thereby maintaining the cylinder pressure and ensuring the safety of loading and unloading materials.

[0017] In summary, the beneficial effects of this utility model are: By combining the linkage structure design of the clamping arm assembly with the synergistic effect of the hydraulic control components, adaptive clamping of cylindrical loads is achieved, effectively preventing the material from rolling during loading and unloading and significantly improving operational safety.

[0018] The combination of dual hydraulic cylinders, solenoid valves, and hydraulic locks ensures precise control of clamping force and stable pressure, avoiding the impact of hydraulic system fluctuations on the material's stress.

[0019] The addition of fork side-shifting cylinders enhances the equipment's adaptability to different load specifications, while the reinforcement rod further improves the structural rigidity and motion synchronization of the clamping arm assembly, extending the equipment's service life.

[0020] This invention combines structural optimization with intelligent control, enabling the steel pipe clamp to maintain efficient and stable operation under complex working conditions, providing a reliable guarantee for the loading and unloading of cylindrical materials.

[0021] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0022] Undoubtedly, such and other objects of this invention will become more apparent after the following detailed description of the preferred embodiments, which are illustrated in various accompanying drawings and illustrations.

[0023] To make the above and other objects, features and advantages of this utility model more apparent and understandable, one or more preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0024] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0025] In the accompanying drawings, the same parts use the same reference numerals, and the drawings are schematic and not necessarily drawn to actual scale.

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one or more embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on such drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the steel pipe clamp of this utility model; Figure 2 This is another structural schematic diagram of the steel pipe clamp of this utility model; Figure 3 This is a schematic diagram of the clamping arm assembly of this utility model; Figure 4 This is a schematic diagram of the structure of the fork carriage assembly of this utility model; Figure 5 This is another structural schematic diagram of the fork carriage assembly of this utility model; Figure 6 This is a schematic diagram of the steel pipe clamping under load according to this utility model. Figure 1 ; Figure 7 This is a schematic diagram of the steel pipe clamping under load according to this utility model. Figure 2 .

[0028] Explanation of key figure labels: 1. Forklift carriage assembly; 11. Frame body assembly; 12. Hook assembly; 2. Fork assembly; 21. Left fork; 22. Right fork; 23. Guide rod; 3. Clamping arm assembly; 31. Upper clamping arm assembly; 311. Upper left clamping arm; 312. Upper right clamping arm; 313. Reinforcing rod; 32. Lower clamping arm assembly; 321. Lower left clamping arm; 322. Lower right clamping arm; 4. Hydraulic control components; 41. First clamping arm tensioning assembly; 42. Second clamping arm tensioning assembly; 43. Fork side-shifting cylinder; 44. Solenoid valve; 45. Hydraulic lock. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0030] Furthermore, it should be understood in the description of this utility model that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two main bodies at the connection point are not connected through a transitional structure, but are simply connected to form a whole through a connecting structure. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0032] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] Reference Figures 1-7According to some embodiments of the present invention, a steel pipe clamp is provided. The steel pipe clamp includes a fork carriage assembly 1, a fork assembly 2, a clamping arm assembly 3, and a hydraulic control element 4. The fork assembly 2 is disposed on the front side of the fork carriage assembly 1, and the clamping arm assembly 3 is disposed on the front side of the fork carriage assembly 1 and above the fork assembly 2. The hydraulic control element 4 is used to control the movement of the fork assembly 2 and the clamping arm assembly 3. The clamping arm assembly 3 includes an upper clamping arm assembly 31 and a lower clamping arm assembly 32. One end of the upper clamping arm assembly 31 is rotatably connected to the fork carriage assembly 1, and the other end of the upper clamping arm is rotatably connected to one end of the lower clamping arm assembly 32. The other end of the lower clamping arm is a free end and faces the fork assembly 2.

[0034] This invention improves the structure of the clamping arm and uses hydraulic control element 4 to control the clamping arm, ensuring that the load is continuously pressed on the forks during loading and unloading, preventing the cylindrical load from rolling on the forks and improving safety performance.

[0035] According to some embodiments of this utility model, optionally, the hydraulic control element 4 includes a first clamping arm clamping cylinder 41 and a second clamping arm clamping cylinder 42. The first clamping arm clamping cylinder 41 is used to control the clamping movement of the upper clamping arm assembly 31, and the second clamping arm clamping cylinder 42 is used to control the clamping movement of the lower clamping arm assembly 32. This utility model uses two sets of cylinders to precisely control the opening and closing of the clamping arms, ensuring that the load can be continuously and stably pressed onto the forks during loading and unloading, effectively preventing the cylindrical load from rolling on the forks, thereby significantly improving the safety performance of the equipment.

[0036] According to some embodiments of the present invention, optionally, the fixed end of the first clamping arm tensioning cylinder 41 is connected to the fork carriage assembly 1, the movable end of the first clamping arm tensioning cylinder 41 is connected to the upper clamping arm assembly 31, the fixed end of the second clamping arm tensioning cylinder 42 is connected to the upper clamping arm assembly 31, and the movable end of the second clamping arm tensioning cylinder 42 is connected to the lower clamping arm assembly 32. This invention combines the connection between the first clamping arm tensioning cylinder 41 and the fork carriage assembly 1 and the upper clamping arm assembly 31 with the connection between the second clamping arm tensioning cylinder 42 and the upper clamping arm assembly 31 and the lower clamping arm assembly 32, forming a linkage clamping arm drive structure. This allows the upper clamping arm assembly 31 and the lower clamping arm assembly 32 to move in tandem under hydraulic drive. When the first clamping arm tensioning cylinder 41 extends or retracts, it directly drives the upper clamping arm assembly 31 to perform a clamping motion around the rotation point with the fork carriage assembly 1. Simultaneously, the second clamping arm tensioning cylinder 42 adjusts its position with the movement of the upper clamping arm assembly 31 and further controls the clamping angle of the lower clamping arm assembly 32 through its own extension and retraction, thereby achieving adaptive clamping of cylindrical loads of different sizes. This linkage control method not only improves the coordination and flexibility of the clamping arm movements but also automatically adjusts the clamping force according to the actual size of the load, ensuring a stable clamping state regardless of changes in the load diameter during loading and unloading, further enhancing the adaptability and reliability of the equipment under complex working conditions.

[0037] According to some embodiments of this utility model, optionally, the hydraulic control element 4 includes a fork side-shifting cylinder 43 disposed on the fork carriage assembly 1. The fork side-shifting cylinder 43 is used to control the displacement movement of the fork assembly 2. By setting the fork side-shifting cylinder 43, this utility model adjusts the spacing between the forks and the fork position, enabling the fork assembly 2 to be laterally adjusted according to the length or stacking position of the cylindrical load, further improving the equipment's adaptability to steel pipes of different specifications or cylindrical loads. When it is necessary to clamp a long steel pipe, the fork side-shifting cylinder 43 can drive the fork assembly 2 to move to both sides, increasing the fork spacing to accommodate the load length; if there is a deviation in the load stacking position, the fork position can also be adjusted to achieve precise alignment, avoiding problems such as unstable clamping or load slippage caused by improper fork position.

[0038] According to some embodiments of this utility model, optionally, the hydraulic control element 4 includes a solenoid valve 44 and a hydraulic lock 45. By configuring the solenoid valve 44 and the hydraulic lock 45, this utility model achieves precise control of the cylinder oil circuit and pressure holding, thereby stabilizing the cylinder pressure and ensuring that the force on the material is not affected by hydraulic system pressure fluctuations, thus improving operational safety.

[0039] According to some embodiments of the present invention, optionally, the upper clamping arm assembly 31 includes a left upper clamping arm 311 and a right upper clamping arm 312, and the lower clamping arm assembly 32 includes a left lower clamping arm 321 and a right lower clamping arm 322. One end of the left upper clamping arm 311 is rotatably connected to the fork carriage assembly 1, and the other end of the left upper clamping arm 311 is rotatably connected to one end of the left lower clamping arm 321. The other end of the left lower clamping arm 321 is a free end and faces the fork carriage assembly 1. By rotatably connecting the left upper clamping arm 311 and the right upper clamping arm 312 to the fork carriage assembly 1 respectively, and rotatably connecting the left upper clamping arm 311 to the left lower clamping arm 321 and the right upper clamping arm 312 to the right lower clamping arm 322 respectively, the present invention forms two sets of symmetrical lever structures, so that the clamping arm assembly 3 can open and close about the rotation connection point as the axis under hydraulic drive, thereby achieving stable clamping of cylindrical loads. When the hydraulic control element 4 drives the clamping arm assembly 3 to move, the upper left clamping arm 311 and the lower left clamping arm 321, the upper right clamping arm 312 and the lower right clamping arm 322 will work together, with their free ends moving closer to each other to clamp the load, or moving away from each other to release the load. Through the lever principle, the clamping force is effectively amplified, improving the clamping effect on steel pipes or cylindrical loads of different diameters. At the same time, this symmetrical structure can also ensure that the load is evenly stressed, avoiding load shift or damage due to excessive stress on one side.

[0040] Optionally, according to some embodiments of this utility model, a reinforcing rod 313 is provided between the upper left clamping arm 311 and the upper right clamping arm 312. By providing the reinforcing rod 313 to connect the left and right clamping arms, this utility model can further improve the overall structural rigidity and stability of the clamping arm assembly 3, preventing relative deformation or swaying of the left and right clamping arms due to excessive force during clamping. The two ends of the reinforcing rod 313 are fixedly connected to the upper left clamping arm 311 and the upper right clamping arm 312 respectively, forming a transverse support structure. This organically combines two sets of symmetrical lever structures into an integral frame, so that when the left clamping arm is subjected to force, the force can be transmitted to the right clamping arm through the reinforcing rod 313, and vice versa, thereby ensuring the synchronicity and consistency of the movement of the left and right clamping arms and avoiding the impact of clamping accuracy due to deformation of one side of the clamping arm. Meanwhile, the reinforcing rod 313 can also disperse the stress concentration of the clamping arm assembly 3 under load, enhance the fatigue resistance of the clamping arm assembly 3, and extend the service life of the equipment. Especially when clamping heavy or large-diameter cylindrical loads, the setting of the reinforcing rod 313 can effectively improve the load-bearing capacity and operational safety of the entire steel pipe clamp.

[0041] According to some embodiments of the present invention, optionally, there are at least two reinforcing rods 313.

[0042] According to some embodiments of the present invention, optionally, the fork assembly 2 includes a left fork 21, a right fork 22, and a guide rod 23. The guide rod 23 is disposed on the fork carriage assembly 1, and both the left fork 21 and the right fork 22 are disposed on the guide rod 23. By disposing the left fork 21 and the right fork 22 on the guide rod 23 and indirectly disposing them on the fork carriage assembly 1, the present invention enables the left and right forks 22 to move stably on the guide rod 23.

[0043] According to some embodiments of the present invention, optionally, the forklift assembly 1 includes a frame assembly 11 and a hook assembly 12 disposed on the frame assembly 11.

[0044] The working principle of this utility model is as follows: The solenoid valve 44 is controlled to drive the first clamping arm cylinder 41 to retract, thereby causing the upper clamping arm assembly 31 to move upward. Simultaneously, the second clamping arm cylinder 42 also retracts, causing the lower clamping arm assembly 32 to move upward and press against the upper clamping arm assembly 31 at its limit position. At this point, the fork assembly 2 picks up the material. The solenoid valve 44 is then operated to drive the first clamping arm cylinder 41 to open, causing the upper clamping arm assembly 31 to separate from the lower clamping arm assembly 32, firmly holding the material in place. Subsequently, the second clamping arm cylinder 42 continues to open, further adjusting the angle of the clamping mechanism and applying pressure to prevent the material from rolling. At the same time, the hydraulic lock 45 maintains pressure to ensure stable cylinder pressure, thereby ensuring the safety of the material loading and unloading process.

[0045] It should be noted that many specific details have been set forth in the above description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

Claims

1. A steel pipe clamp, characterized in that, include: Forklift assembly; A fork assembly disposed on the front side of the fork carriage assembly; A clamping arm assembly is disposed on the front side of the fork carriage assembly and above the fork assembly; Hydraulic control elements are used to control the movement of the fork assembly and the clamping arm assembly; The clamping arm assembly includes an upper clamping arm assembly and a lower clamping arm assembly. One end of the upper clamping arm assembly is rotatably connected to the fork carriage assembly, and the other end of the upper clamping arm assembly is rotatably connected to one end of the lower clamping arm assembly. The other end of the lower clamping arm assembly is a free end and faces the fork carriage assembly.

2. The steel pipe clamp according to claim 1, characterized in that, The hydraulic control element includes a first clamping arm tensioning cylinder and a second clamping arm tensioning cylinder. The first clamping arm tensioning cylinder is used to control the tensioning movement of the upper clamping arm assembly, and the second clamping arm tensioning cylinder is used to control the tensioning movement of the lower clamping arm assembly.

3. The steel pipe clamp according to claim 2, characterized in that, The fixed end of the first clamping arm tensioning cylinder is connected to the fork carriage assembly, the movable end of the first clamping arm tensioning cylinder is connected to the upper clamping arm assembly, the fixed end of the second clamping arm tensioning cylinder is connected to the upper clamping arm assembly, and the movable end of the second clamping arm tensioning cylinder is connected to the lower clamping arm assembly.

4. The steel pipe clamp according to claim 1, characterized in that, The hydraulic control element includes a fork side-shifting cylinder disposed on the fork carriage assembly, the fork side-shifting cylinder being used to control the displacement movement of the fork assembly.

5. The steel pipe clamp according to any one of claims 2-4, characterized in that, The hydraulic control components include solenoid valves and hydraulic locks.

6. The steel pipe clamp according to claim 1, characterized in that, The upper clamping arm assembly includes an upper left clamping arm and an upper right clamping arm, and the lower clamping arm assembly includes a lower left clamping arm and a lower right clamping arm. One end of the upper left clamping arm is rotatably connected to the fork carriage assembly, and the other end of the upper left clamping arm is rotatably connected to one end of the lower left clamping arm. The other end of the lower left clamping arm is a free end and faces the fork carriage assembly.

7. The steel pipe clamp according to claim 6, characterized in that, A reinforcing rod is provided between the upper left clamping arm and the upper right clamping arm.

8. The steel pipe clamp according to claim 7, characterized in that, There are at least two reinforcing rods.

9. The steel pipe clamp according to claim 1, characterized in that, The fork assembly includes a left fork, a right fork, and a guide rod. The guide rod is disposed on the fork carriage assembly, and both the left fork and the right fork are disposed on the guide rod.

10. The steel pipe clamp according to claim 1, characterized in that, The fork carriage assembly includes a frame assembly and a hook assembly disposed on the frame assembly.

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