Steel pipe tightening sleeve structure

Abstract

The utility model discloses a steel pipe tightening sleeve structure, which relates to the technical field of fasteners and comprises a rotary sleeve and a connector, a clamping block is arranged on one side of the connector, external threads are arranged in the middle of the connector, a clamping pipe is arranged on the other side of the connector, an upper pipe is fixed by the clamping block, and a lower pipe is fixed by the clamping pipe. Compared with an existing fastening structure which uses a stud for fixing, the fastening structure is simpler and more convenient to operate, the stud needs to be tightened through a tool in the past, and the installation and adjustment process of the stud is complex, the fastening structure can complete fastening only through a simple screwing action, operation time and labor cost are greatly saved, and fastening efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, and in particular to a steel pipe tightening sleeve structure. Background Technology

[0002] When connecting two stainless steel pipes, a tightening sleeve is usually needed to secure them. Existing tightening sleeve structures are often quite complex and cannot achieve quick assembly and disassembly.

[0003] In the prior art, a stainless steel pipe butt joint connecting sleeve disclosed in patent publication number CN113639112A includes a first retaining ring, a second retaining ring, a buckle, a stud, a pressure plate, a first expansion component, and a second expansion component. This patent fastens the stainless steel pipe with a stud, and its structure is complex, making it impossible to quickly disassemble and assemble. Utility Model Content

[0004] The purpose of this invention is to solve the problem that the existing fastening structure is complicated and uses studs for fixing, which is very troublesome to use. The screw sleeve of this invention is made of rigid material, and when tightened, it presses against the elastic connecting body, making the tightening operation more convenient and the structure simpler.

[0005] Another objective of this utility model is to solve the problem of inconvenient disassembly and assembly in the prior art. This utility model is equipped with a clamping block and a clamping tube to connect two steel pipes respectively, which makes disassembly and assembly very quick.

[0006] Another objective of this invention is to solve the problem that existing steel pipe tightening sleeves are prone to loosening. This invention sets several protrusions on the sleeve and sets limiting pits at corresponding positions on the connecting body. The concave points lock the limiting pits, making it less prone to loosening and improving stability.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a steel pipe tightening sleeve structure, including a screw sleeve and a connecting body, one side of the connecting body is a clamping block, the middle position of the connecting body is provided with an external thread, the other side of the connecting body is a pipe clamp, the clamping block fixes the upper pipe, and the pipe clamp fixes the lower pipe.

[0008] Preferably, the clamping block has several grippers at one end of the upper tube, with gaps between adjacent grippers, and the grippers have a certain degree of elasticity.

[0009] Preferably, the gripper is inclined inward toward the center of the gripping block.

[0010] Preferably, a limiting groove is provided between the tube clamp and the clamping block, and the lower tube is inserted into the limiting groove.

[0011] Preferably, the sleeve has an internal thread, so that when fixed, the internal thread on the sleeve is screwed into the external thread of the connector.

[0012] Preferably, the connector has several limiting pits, and the corresponding position of the sleeve has the same protrusion. When tightened, the protrusion locks into the limiting pit.

[0013] Preferably, the surface of the sleeve is provided with several recesses, which are elliptical in shape.

[0014] Preferably, the diameter of the sleeve near the upper tube is smaller than the diameter near the lower tube.

[0015] Preferably, the angle between the outer wall of the sleeve and the axis of the sleeve is between 3° and 12°.

[0016] Preferably, the sleeve is a rigid structure, which presses the connecting body when the sleeve is tightened, and the connecting body has a certain degree of elasticity.

[0017] Compared with the prior art, the beneficial effects of this utility model are: This utility model achieves fastening by tightening with a screw sleeve. Compared with the existing fastening structure that uses studs for fixing, the operation is simpler and more convenient. In the past, tools were needed to tighten the studs, and the installation and adjustment process of the studs was relatively complicated. However, this utility model can complete the fastening with just a simple screw sleeve action, which greatly saves operating time and labor costs and improves fastening efficiency.

[0018] This utility model features a clamping block and a clamping tube that connect to two steel pipes respectively, making the disassembly and assembly process very simple. In the prior art, disassembly and assembly may require complex tools and cumbersome steps. However, the structural design of this utility model allows for easy separation of the clamping block and clamping tube during disassembly and quick connection during installation. This facilitates rapid replacement of parts or maintenance of the equipment, increasing the flexibility and practicality of the equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0021] Figure 3 for Figure 2 Enlarged view of the structure at point C.

[0022] Figure 4 for Figure 3 Enlarged view of the structure at point D.

[0023] Figure 5 This is a schematic diagram of the connector of this utility model.

[0024] Figure 6 This is a schematic diagram of the screw sleeve of this utility model.

[0025] In the diagram: 1. Upper tube; 2. Sleeve; 21. Recess; 22. Internal thread; 3. Lower tube; 4. Connector; 41. Clamping block; 42. Claw; 43. Gap; 44. External thread; 45. Limiting groove; 46. Pipe clamp; 5. Limiting pit; 6. Protrusion. Detailed Implementation

[0026] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. The described embodiments are only some embodiments of this utility model, and not all embodiments.

[0027] Example 1: Refer to Figures 1 to 6 A steel pipe tightening sleeve structure is mainly composed of a screw sleeve 2 and a connecting body 4. One side of the connecting body 4 is designed as a clamping block 41, and the other side is a pipe clamp 46. An external thread 44 is carefully provided in the middle of the connecting body 4; this key design lays the foundation for subsequent tightening operations. The connecting body 4 has a certain degree of elasticity in its material, and this elasticity plays a crucial role in the tightening process.

[0028] The sleeve 2 adopts a rigid structure, with an internal thread 22 that matches the external thread 44 of the connector 4. When the sleeve 2 is tightened, its rigidity allows it to apply pressure to the connector 4. Due to the elasticity of the connector 4, it deforms to a certain extent under the pressure of the sleeve 2, generating a strong clamping force that firmly secures the upper tube 1 and the lower tube 3, achieving excellent fastening. Specifically, the clamping block 41 is responsible for fixing the upper tube 1, while the tube clamp 46 is responsible for fixing the lower tube 3.

[0029] Several protrusions 6 are provided on the sleeve 2, and a limiting pit 5 is provided at the corresponding position of the connecting body 4. The concave point 6 is stuck in the limiting pit 5, making it less prone to loosening and more stable.

[0030] The clamping block 41 has several grippers 42 that hold one end of the upper tube 1. These grippers 42 are evenly distributed radially, with gaps 43 between adjacent grippers 42. The design of the gaps 43 makes the grippers 42 more flexible during the tightening process, allowing them to better adapt to the shape of the upper tube 1 and improve the stability of the clamping. In addition, the grippers 42 themselves are also elastic, which allows them to deform appropriately according to the surface condition of the upper tube 1 during the tightening of the sleeve 2, further enhancing the clamping force on the upper tube 1 and ensuring that the upper tube 1 will not loosen under force.

[0031] The gripper 42 is inclined inward towards the center of the clamping block 41, exhibiting an inward curve. This inward curve design allows the gripper 42 to fit more tightly against the outer wall of the upper tube 1 when clamping it, increasing the contact area with the upper tube 1 and thus improving the clamping stability. When the sleeve 2 is tightened, the inwardly curved gripper 42 will generate an inward clamping force due to elastic deformation, making the upper tube 1 more firmly fixed in the clamping block 41, effectively preventing the upper tube 1 from shifting or loosening during use.

[0032] The angle between the outer wall of the sleeve and the shaft of the sleeve is between 3° and 12°. In actual use, the sleeve is screwed in more tightly when the angle between the outer wall of the sleeve and the shaft of the sleeve is at this angle.

[0033] A limiting groove 45 is provided between the clamping tube 46 and the clamping block 41. When the lower tube 3 is clamped into the limiting groove 45, the limiting groove 45 can limit the position of the lower tube 3. This not only improves the accuracy of the installation of the lower tube 3, but also ensures that the lower tube 3 maintains a stable position during the tightening process, avoiding poor tightening effect due to position deviation. The shape and size of the limiting groove 45 are adapted to the outer wall of the lower tube 3, so that the lower tube 3 can be tightly embedded therein, further enhancing the connection strength between the lower tube 3 and the connecting body 4.

[0034] The sleeve 2 has an internal thread 22, while the connecting body 4 has an external thread 44 in the middle. In actual tightening, the internal thread 22 of the sleeve 2 is screwed into the external thread 44 of the connecting body 4, and the sleeve 2 is rotated to ensure a tight fit. This threaded connection method is not only easy to operate but also provides a large clamping force, ensuring a secure connection between the upper tube 1 and the lower tube 3. The rigid material of the sleeve 2 effectively transmits force to the connecting body 4 during tightening, causing the connecting body 4 to undergo elastic deformation, thereby achieving a reliable fastening of the upper tube 1 and the lower tube 3.

[0035] This steel pipe tightening sleeve structure, through the ingenious cooperation of the screw sleeve 2 and the connecting body 4, as well as the optimized design of various components such as the clamping block 41, the claw 42, and the pipe clamp 46, achieves a steel pipe connection method with good tightening effect and simple operation. It has high practical value and broad market application prospects, and can effectively meet the tightening needs in various steel pipe connection scenarios, providing a reliable guarantee for the installation and use of steel pipes.

[0036] Example 2: Refer to Figures 1 to 6 A steel pipe tightening sleeve structure is mainly composed of a screw sleeve 2 and a connecting body 4. One side of the connecting body 4 is designed as a clamping block 41, and the other side is a pipe clamp 46. An external thread 44 is carefully designed in the middle of the connecting body 4, a key design that lays the foundation for subsequent tightening operations. The connecting body 4 has a certain degree of elasticity in its material, and this elasticity plays a crucial role in the tightening process.

[0037] Specifically, the connector 4 is made of high-quality elastic material, whose elastic modulus has been precisely calculated and tested to ensure that it can generate sufficient deformation under the clamping action of the sleeve 2, thereby generating a strong clamping force. This material not only has good elastic recovery performance, but also has sufficient strength and durability to withstand multiple tightening and loosening operations, ensuring a long-term stable tightening effect.

[0038] The sleeve 2 employs a rigid structure, with an ingeniously designed internal thread 22 that matches the external thread 44 of the connecting body 4. The sleeve 2 is typically made of rigid materials such as high-strength alloy steel to ensure it can withstand significant torque during tightening without deformation or damage. When the sleeve 2 is tightened, its rigidity allows it to apply uniform and powerful pressure to the connecting body 4.

[0039] Because the connector 4 is elastic, it will deform to a certain extent under the pressure of the sleeve 2. This deformation is mainly concentrated in the clamping block 41 and the tube clamp 46, thereby generating a strong clamping force to firmly fix the upper tube 1 and the lower tube 3, achieving a fastening effect. The clamping block 41 is responsible for fixing the upper tube 1, while the tube clamp 46 is responsible for fixing the lower tube 3.

[0040] In practical applications, the connection between the upper pipe 1 and the lower pipe 3 needs to have high strength and stability to ensure the safe and reliable operation of the entire steel pipe structure. This steel pipe tightening sleeve structure, through the tight fit between the screw sleeve 2 and the connecting body 4, can effectively fix the upper pipe 1 and the lower pipe 3 together, forming a robust whole that meets the requirements of various working conditions.

[0041] The clamping block 41 has several grippers 42 that hold one end of the upper tube 1. These grippers 42 are evenly distributed radially, and gaps 43 are formed between adjacent grippers 42. The design of the gaps 43 makes the grippers 42 more flexible during the fastening process, better adapts to the shape of the upper tube 1, and improves the stability of the clamping.

[0042] The number and distribution of the grippers 42 are carefully designed to ensure uniform clamping of the upper tube 1. Typically, there are three or four grippers 42, evenly distributed at 120° or 90° angles. This uniform distribution ensures that the grippers 42 generate a uniform clamping force when clamping the upper tube 1, preventing damage or deformation of the upper tube 1 due to excessive local pressure. Furthermore, the grippers 42 themselves are elastic, allowing them to deform appropriately according to the surface condition of the upper tube 1 during the tightening process of the sleeve 2, further enhancing the clamping force and ensuring that the upper tube 1 does not loosen under stress.

[0043] For example, in certain special cases, the surface of the upper tube 1 may have slight irregularities or machining errors. The elastic design of the gripper 42 allows it to automatically adapt to these irregularities. When tightening the sleeve 2, the gripper 42 deforms accordingly to the actual shape of the upper tube 1, filling the tiny gaps on the surface of the tube, thus achieving a tighter fit. This adaptive capability greatly improves the reliability and stability of the clamping, ensuring a secure connection of the upper tube 1 under various complex working conditions.

[0044] The gripper 42 is inclined towards the center of the clamping block 41, presenting an inward curve. This inward curve design allows the gripper 42 to fit more tightly against the outer wall of the upper tube 1 when clamping the upper tube 1, increasing the contact area with the upper tube 1 and thus improving the clamping firmness.

[0045] The design of the inwardly curved jaw 42 is based on mechanical principles. By increasing the contact area between the jaw 42 and the upper tube 1, the clamping force can be distributed more evenly, reducing local stress concentration. When the sleeve 2 is tightened, the inwardly curved jaw 42 will generate an inward clamping force due to elastic deformation, making the upper tube 1 more firmly fixed in the clamping block 41, effectively preventing the upper tube 1 from shifting or loosening during use.

[0046] Specifically, during the tightening of the sleeve 2, the front end of the inwardly curved jaw 42 gradually retracts inward, tightly gripping the outer wall of the upper pipe 1. Due to the inwardly curved shape of the jaw 42, the contact area between its front end and the upper pipe 1 increases, and the clamping force is applied more evenly to the surface of the upper pipe 1, thereby enhancing the stability and reliability of the clamping. This design can effectively prevent the upper pipe 1 from coming off or loosening when subjected to large axial tensile or lateral forces, improving the safety and reliability of the entire steel pipe connection structure.

[0047] The shape and size of the limiting groove 45 are adapted to the outer wall of the lower tube 3, allowing the lower tube 3 to be tightly embedded within it. Typically, the cross-sectional shape of the limiting groove 45 can be circular, square, or other shapes that match the shape of the outer wall of the lower tube 3. When installing the lower tube 3, simply align the lower tube 3 with the opening of the limiting groove 45 and gently push it in. The inner wall of the limiting groove 45 generates a certain amount of friction and positioning force on the lower tube 3, ensuring the accuracy of the lower tube 3 in its initial installation position.

[0048] Furthermore, the depth and width of the limiting groove 45 have also been optimized to ensure that the clamping tube 46 can generate sufficient clamping force on the lower tube 3 during the tightening process of the sleeve 2. As the sleeve 2 is gradually tightened, the connecting body 4 undergoes elastic deformation under the pressure of the sleeve 2, and the clamping tube 46 will contract inward. The pressure between the inner wall of the limiting groove 45 and the outer wall of the lower tube 3 gradually increases, thereby achieving a firm clamping of the lower tube 3. This design of the matching of the limiting groove 45 and the clamping tube 46 not only improves the installation efficiency of the lower tube 3, but also enhances the connection strength between the lower tube 3 and the connecting body 4, ensuring the stability and reliability of the entire steel pipe connection structure.

[0049] The sleeve 2 has an internal thread 22, while the connecting body 4 has an external thread 44 in the middle. In actual fastening operation, the internal thread 22 on the sleeve 2 is screwed into the external thread 44 on the connecting body 4, and the two are tightly fitted by rotating the sleeve 2.

[0050] Threaded connections are a common type of mechanical connection, offering advantages such as simple structure, convenient operation, and reliable connection. In this steel pipe tightening sleeve structure, the thread parameters of the internal thread 22 and the external thread 44 are precisely designed to ensure sufficient friction and clamping force are generated during tightening. Typically, thread profile, pitch, diameter, and other parameters need to be optimized according to actual usage requirements to meet different tightening needs.

[0051] Fine-pitch threads offer higher thread strength and better self-locking performance, making them suitable for applications requiring high tensile strength and vibration. Coarse-pitch threads, on the other hand, have a larger pitch, enabling faster tightening speeds and are suitable for applications where high tightening speed is critical. When designing this steel pipe tightening sleeve structure, appropriate thread parameters can be selected based on the specific operating environment and load requirements to achieve the best tightening effect.

[0052] When the sleeve 2 is tightened, its rigid material effectively transmits force to the connecting body 4, causing the connecting body 4 to undergo elastic deformation. This elastic deformation is mainly manifested in the clamping block 41 and the pipe clamping 46, causing the jaws 42 and the limiting groove 45 to generate strong clamping forces on the upper pipe 1 and the lower pipe 3, respectively. By controlling the tightening degree of the sleeve 2, the magnitude of the clamping force can be adjusted to accommodate steel pipes of different diameters and wall thicknesses, achieving a balance between versatility and fastening effect.

[0053] In practice, operators can select the appropriate size of the steel pipe tightening sleeve structure according to the specifications of the steel pipes to be connected, and control the tightening torque of the sleeve 2 with tools such as a torque wrench to ensure that the specified clamping force is achieved. This threaded connection method is not only easy to operate, but also provides a large clamping force to ensure a firm connection between the upper pipe 1 and the lower pipe 3, meeting the usage requirements under various working conditions.

[0054] No complicated tools or equipment are required. Simply place the upper pipe 1 and lower pipe 3 into the corresponding positions of the clamping block 41 and pipe clamp 46, and then tighten the screw sleeve 2 by hand or with a simple tool to complete the connection, greatly improving installation efficiency. When it is necessary to disassemble the steel pipe, simply rotate the screw sleeve 2 in the opposite direction to easily release the clamping force of the connector 4 on the upper pipe 1 and lower pipe 3, making disassembly quick and convenient, and facilitating the maintenance, replacement or reconfiguration of the steel pipe.

[0055] By adjusting parameters such as the shape of the clamp 42, the size of the gap 43, and the size of the limiting groove 45, it can adapt to steel pipes of different diameters and wall thicknesses, exhibiting good versatility and interchangeability, and meeting the connection needs of various specifications of steel pipes. All components are made of high-quality materials and undergo rigorous processing and quality testing to ensure their stability and reliability during long-term use. The combined design of the elastic connector 4 and the rigid sleeve 2 effectively resists the influence of external factors such as vibration and impact, ensuring the firmness and stability of the steel pipe connection and reducing the risk of loosening or detachment at the connection point.

[0056] The surface of the sleeve 2 is designed with several recesses 21, which significantly improves the user experience of the entire steel pipe tightening sleeve. Each recess 21 is machined into an oval shape. When the user screws the sleeve 2 in by hand, the oval recesses 21 can perfectly fit the contact area of ​​the fingers, increasing the contact area and thus greatly improving friction, effectively preventing hand slippage. This anti-slip design ensures precise and stable operation of the sleeve 2 under any environmental conditions. The diameter of the sleeve 2 is relatively smaller on the side closer to the upper tube 1, while the diameter is correspondingly larger on the side closer to the lower tube 3.

[0057] For those skilled in the art, the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

Claims

1. A steel pipe tightening sleeve structure, characterized in that, It includes a sleeve and a connector. One side of the connector is a clamping block, and the middle of the connector is provided with an external thread. The other side of the connector is a tube clamp. The clamping block fixes the upper tube, and the tube clamp fixes the lower tube.

2. The steel pipe tightening sleeve structure according to claim 1, characterized in that, The clamping block has several jaws that hold the upper tube at one end. There are gaps between adjacent jaws, and the jaws have a certain degree of elasticity.

3. The steel pipe tightening sleeve structure according to claim 2, characterized in that, The grippers are inclined inward towards the center of the gripping block.

4. A steel pipe tightening sleeve structure according to claim 1 or 3, characterized in that, A limiting groove is provided between the tube clamp and the clamping block, and the lower tube is inserted into the limiting groove.

5. A steel pipe tightening sleeve structure according to claim 1 or 3, characterized in that, The sleeve has an internal thread. When fixed, the internal thread on the sleeve is screwed into the external thread of the connector.

6. The steel pipe tightening sleeve structure according to claim 5, characterized in that, The connecting body has several limiting pits, and the corresponding positions of the screw sleeve have the same protrusions. When tightened, the protrusions lock into the limiting pits.

7. A steel pipe tightening sleeve structure according to claim 1 or 6, characterized in that, The surface of the sleeve is provided with several pits, which are elliptical in shape.

8. A steel pipe tightening sleeve structure according to claim 1 or 6, characterized in that, The diameter of the sleeve near the upper tube is smaller than the diameter near the lower tube.

9. A steel pipe tightening sleeve structure according to claim 8, characterized in that, The angle between the outer wall of the sleeve and the axis of the sleeve is between 3° and 12°.

10. A steel pipe tightening sleeve structure according to claim 1 or 9, characterized in that, The sleeve is a rigid structure. When the sleeve is tightened, it presses against the connecting body, which has a certain degree of elasticity.

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