Hot-dip plastic-coated steel pipe with facilitated assembly

Abstract

The utility model relates to a hot -dip plastic steel pipe convenient to assemble, including steel pipe, both ends of steel pipe outside are all fixedly connected with connecting sleeve, both ends of connecting sleeve all are established with special groove, the inside of special groove all are rotatably connected with semicircle buckle, the utility model has the advantages of adopting the buckle mode of pure mechanical structure, and need not bolt, flange and the like auxiliary connecting piece, spares the tool tightening step, and single person can complete the assembly, and the construction efficiency is greatly promoted, the reset spring provides the pre -tightening force continuously, ensures that semicircle buckle always closely fits, can keep the connection stability even under the vibration environment, the combination design of semicircular connecting sleeve and semicircle buckle guarantees the connecting strength, and the component processing difficulty is reduced, and the manufacturing cost is saved, when disassembling in the later period, can be released locking only need to push the push rod, is convenient for maintenance replacement.

Description

Technical Field

[0001] This utility model relates to the field of hot-dip plastic-coated steel pipe technology, and in particular to a hot-dip plastic-coated steel pipe that is easy to assemble. Background Technology

[0002] Hot-dip plastic-coated steel pipe is a composite pipe in which a uniform plastic coating is formed on the surface of the steel pipe through a hot-dip plastic coating process. It combines the high strength of steel pipe with the corrosion resistance of plastic and is widely used in various fluid transportation and cable protection scenarios.

[0003] However, in the existing technology, the existing connection methods mostly use flange connection, threaded connection or welding, which require special tools such as wrenches and welding machines. The assembly process is cumbersome, time-consuming and labor-intensive. Especially in confined spaces or when working at heights, the operation is difficult and the construction efficiency is low. Moreover, threaded connections are prone to leakage due to the aging of the sealing tape, while welding may damage the plastic layer on the surface of the steel pipe, affecting its anti-corrosion performance. Utility Model Content

[0004] In view of the above-mentioned problems in the prior art, the main purpose of this utility model is to provide a hot-dip plastic-coated steel pipe that is easy to assemble. This solves the problem that the existing connection methods mostly use flange connection, threaded connection or welding, which require special tools such as wrenches and welding machines. The assembly process is cumbersome, time-consuming and labor-intensive, especially in confined spaces or high-altitude operations, where the operation is difficult and the construction efficiency is low. Moreover, threaded connections are prone to leakage due to the aging of the sealing tape, and welding may damage the plastic layer on the surface of the steel pipe, affecting the anti-corrosion performance.

[0005] The technical solution of this utility model is as follows: a hot-dip plastic-coated steel pipe that is easy to assemble, comprising a steel pipe, with connecting sleeves fixedly connected to both ends of the outer side of the steel pipe, and irregular grooves opened at both ends of the connecting sleeves. Semicircular buckles are rotatably connected inside the irregular grooves, and levers are fixedly connected to the outer side of the semicircular buckles and inside the irregular grooves. One end of each lever extends to the outer side of the irregular groove, and a return spring is fixedly connected between the lever and the irregular groove. The semicircular buckles are used in conjunction with each other, and the connecting sleeves are all semicircular.

[0006] The above technical solution employs a purely mechanical fastening method, eliminating the need for auxiliary connectors such as bolts and flanges, and removing the need for tool tightening. Assembly can be completed by a single person, significantly improving construction efficiency. The return spring continuously provides pre-tightening force, ensuring that the semi-circular buckle always fits tightly, maintaining connection stability even in vibration environments. The combination design of the semi-circular connecting sleeve and the semi-circular buckle not only ensures connection strength but also reduces the difficulty of component processing, saving manufacturing costs. During later disassembly, the locking can be released simply by moving the lever, facilitating maintenance and replacement.

[0007] In a preferred embodiment, a first sealing groove is provided at one end of the steel pipe, and a blocking ring is fixedly connected inside the first sealing groove. A groove is provided at the end of the steel pipe away from the first sealing groove, and the groove is used in conjunction with the blocking ring.

[0008] Through the above technical solutions, the cooperation between the blocking ring and the groove achieves the initial sealing of the connection, effectively blocking the leakage path of liquid, gas and other media; the physical limiting function avoids the axial movement of the steel pipe caused by pressure or vibration during use, and enhances the overall connection rigidity; during assembly, the alignment of the blocking ring and the groove can be used to judge whether the connection is in place, reducing operational errors; the first sealing groove provides an installation reference for the blocking ring, ensuring its positional accuracy and guaranteeing the consistency of the sealing effect.

[0009] In a preferred embodiment, a second sealing groove is provided at equal intervals at one end of the outer side of the steel pipe, and a sealing ring is fixedly connected at equal intervals to the inner wall of the first sealing groove. The sealing ring is used in conjunction with the second sealing groove.

[0010] Through the above technical solutions, the multi-stage sealing design significantly improves the sealing level of the connection parts, making it suitable for high-pressure, high-purity media transportation scenarios; the elastic deformation capability of the sealing ring can compensate for the thermal expansion and contraction gap caused by temperature changes in the steel pipe, avoiding sealing failure; the second sealing groove plays a positioning and protection role for the sealing ring, preventing it from shifting or wearing during assembly or use; the equidistantly distributed sealing structure ensures that the pressure is evenly distributed at the connection parts, reducing local stress concentration and extending service life.

[0011] In a preferred embodiment, the end of the lever extending to the outside of the groove is fixedly connected with an anti-slip protrusion.

[0012] The above technical solutions significantly reduce the risk of slippage during operation, ensuring operational reliability and improving construction safety, especially in humid or oily environments. They also reduce the hand strength required for operation, lowering the labor intensity of operators and making them suitable for long-term continuous work. The anti-slip protrusions provide a noticeable tactile feedback, helping operators quickly locate the lever position and shortening the operation reaction time. The structure is simple and can be achieved through surface treatment alone, without increasing manufacturing costs.

[0013] In a preferred embodiment, the blocking ring is an elastic rubber ring, and the outer side of the blocking ring is provided with an inclined guide surface.

[0014] The combination of the elastic material and the guide surface significantly reduces the assembly difficulty, allowing for smooth docking even with certain installation errors, thus improving the construction tolerance rate. The interference fit enhances the sealing effect, and the corrosion resistance of the rubber material itself extends the service life of the sealing structure. The cushioning properties of the rubber can absorb the vibration energy of the pipeline, reducing noise and component wear. The inclined guide surface makes the insertion process smoother, avoiding component damage caused by hard impacts and protecting the integrity of the product.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows: This utility model adopts a purely mechanical fastening method, eliminating the need for auxiliary connecting parts such as bolts and flanges, saving the tightening steps with tools, allowing a single person to complete the assembly, and significantly improving construction efficiency; the return spring continuously provides pre-tightening force, ensuring that the semi-circular buckle always fits tightly, maintaining connection stability even in vibration environments; the combination design of the semi-circular connecting sleeve and the semi-circular buckle not only ensures connection strength but also reduces the difficulty of component processing, saving manufacturing costs; later disassembly only requires moving a lever to release the lock, facilitating maintenance and replacement.

[0016] The combination of the blocking ring and the groove achieves initial sealing at the connection point, effectively blocking the leakage path of liquid, gas, and other media. The physical limiting function prevents axial movement of the steel pipe due to pressure or vibration during use, enhancing the overall connection rigidity. During assembly, the alignment of the blocking ring and the groove can be used to determine whether the connection is in place, reducing operational errors. The first sealing groove provides an installation reference for the blocking ring, ensuring its positional accuracy and guaranteeing consistent sealing performance. The multi-stage sealing design significantly improves the sealing level of the connection point, making it suitable for high-pressure, high-purity media transportation scenarios. The elastic deformation capability of the sealing ring can compensate for the thermal expansion and contraction gaps caused by temperature changes in the steel pipe, preventing seal failure. The second sealing groove provides positioning protection for the sealing ring, preventing it from shifting or wearing during assembly or use. The equidistantly distributed sealing structure ensures uniform pressure distribution at the connection point, reducing local stress concentration and extending service life. Attached Figure Description

[0017] Figure 1 is a three-dimensional structural diagram of a hot-dip plastic-coated steel pipe that is easy to assemble according to the present invention;

[0018] Figure 2 is a right-side structural schematic diagram of the hot-dip plastic-coated steel pipe provided by this utility model for easy assembly;

[0019] Figure 3 is a top cross-sectional view of the hot-dip plastic-coated steel pipe provided by this utility model for easy assembly;

[0020] Figure 4 is a cross-sectional side view of the hot-dip plastic-coated steel pipe provided by this utility model for easy assembly.

[0021] Legend: 1. Steel pipe; 2. Connecting sleeve; 3. Irregular groove; 4. Semi-circular buckle; 5. Toggle lever; 6. Return spring; 7. First sealing groove; 8. Sealing ring; 9. Blocking ring; 10. Groove; 11. Second sealing groove. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] Example

[0024] As shown in Figures 1, 2, 3, and 4, this utility model provides a technical solution: it includes a steel pipe 1, with connecting sleeves 2 fixedly connected to both ends of the outer side of the steel pipe 1. Both ends of the connecting sleeves 2 have irregular grooves 3. Semicircular buckles 4 are rotatably connected inside the irregular grooves 3. A lever 5 is fixedly connected to the outer side of each semicircular buckle 4 and inside the irregular groove 3. One end of each lever 5 extends to the outer side of the irregular groove 3. A return spring 6 is fixedly connected between the lever 5 and the irregular groove 3. The corresponding semicircular buckles 4 cooperate with each other. The connecting sleeves 2 are all semicircular.

[0025] In this embodiment, the semi-circular connecting sleeves 2 at both ends of the steel pipe 1 provide a basic structure for docking, and the irregular grooves 3 at their ends provide rotation space for the semi-circular buckles 4. During assembly, the operator can drive the semi-circular buckles 4 to rotate and open within the irregular grooves 3 by moving the lever 5 extending to the outside of the irregular grooves 3, overcoming the tension of the return spring 6. This allows the connecting sleeves 2 of the two steel pipes to be smoothly aligned and fitted. After releasing the lever 5, the rebound force of the return spring 6 pulls the lever 5 back to its original position, thereby causing the semi-circular buckles 4 to rotate in the opposite direction. This causes the two semi-circular buckles 4 at corresponding positions to interlock and form a complete ring structure, firmly locking the docking connecting sleeves 2 and achieving mechanical locking to prevent the connecting sleeves 2 from separating.

[0026] As shown in Figures 1, 2, 3, and 4, a first sealing groove 7 is provided at one end of the steel pipe 1, and a blocking ring 9 is fixedly connected inside the first sealing groove 7. A groove 10 is provided at the end of the steel pipe 1 away from the first sealing groove 7, and the groove 10 is used in conjunction with the blocking ring 9.

[0027] In this embodiment, the first sealing groove 7 at the end of the steel pipe 1 and the groove 10 form a complementary structure. When the two steel pipes are connected, the end with the blocking ring 9 is inserted into the groove 10 end of the other steel pipe. The blocking ring 9 is completely embedded in the groove 10 and in close contact with the groove wall. At this time, the blocking ring 9 fills the gap between the two to form the first sealing barrier. At the same time, the axial displacement of the steel pipe is restricted by the physical limiting effect, and the double fixation is achieved in conjunction with the snap-fit ​​structure of the connecting sleeve 2.

[0028] As shown in Figures 1, 2, 3, and 4, a second sealing groove 11 is provided at equal intervals on one end of the outer side of the steel pipe 1. A sealing ring 8 is fixedly connected at equal intervals to the inner wall of the first sealing groove 7. The sealing ring 8 and the second sealing groove 11 are used in conjunction.

[0029] In this embodiment, the second sealing groove 11 on the outer side of the steel pipe 1 and the sealing ring 8 on the inner wall of the first sealing groove 7 of the other steel pipe constitute a multi-level sealing structure. When the connecting sleeve 2 is fastened, the sealing ring 8 is squeezed and embedded into the second sealing groove 11, and its elastic deformation fills all the gaps in the groove, forming an annular sealing band. Since the sealing ring 8 and the second sealing groove 11 are designed to be equidistantly distributed, multiple independent sealing barriers can be formed at the connection point. Even if one seal fails, the remaining sealing structures can still maintain sealing performance.

[0030] As shown in Figures 1, 2, 3, and 4, the end of the lever 5 extending to the outside of the irregular groove 3 is fixedly connected with an anti-slip protrusion.

[0031] In this embodiment, the anti-slip protrusion at the end of the lever 5 increases the roughness of the contact surface, thereby changing the frictional characteristics between the operator's hand and the lever 5. When the lever 5 is turned, the anti-slip protrusion can break through the lubrication layer caused by hand sweat or oil, forming an effective friction gripping point, enabling the operator to achieve stable control of the lever 5 with less gripping force.

[0032] As shown in Figures 1, 2, 3, and 4, the blocking ring 9 is an elastic rubber ring, and the outer side of the blocking ring 9 is provided with an inclined guide surface.

[0033] In this embodiment, the elastic rubber material of the blocking ring 9 makes it compressible. During the insertion process into the groove 10, the inclined guide surface converts the axial thrust into the radial expansion force, allowing the blocking ring 9 to automatically adapt to the dimensional deviation of the groove 10 and successfully complete the insertion. After it is in place, the elasticity of the rubber material makes the blocking ring 9 fit tightly against the inner wall of the groove 10, forming an interference fit. At the same time, the inclined angle design of the guide surface avoids jamming during assembly.

[0034] Working principle:

[0035] As shown in Figures 1, 2, 3, and 4, the semi-circular connecting sleeves 2 at both ends of the steel pipe 1 provide a basic structure for docking, and the irregular grooves 3 at their ends provide rotation space for the semi-circular buckles 4. During assembly, the operator moves the lever 5 extending to the outside of the groove 3, which causes the semi-circular buckle 4 to rotate and open within the groove 3, overcoming the tension of the return spring 6. This allows the connecting sleeves 2 of the two steel pipes to align and fit smoothly. After releasing the lever 5, the rebound force of the return spring 6 pulls the lever 5 back to its original position, causing the semi-circular buckle 4 to rotate in the opposite direction. This causes the two semi-circular buckles 4 at corresponding positions to interlock and form a complete ring structure, firmly locking the connecting sleeves 2 and achieving mechanical locking to prevent the connecting sleeves 2 from separating. The first sealing groove 7 at the end of the steel pipe 1 and the groove 10 form a complementary structure. When the two steel pipes are joined, the end with the blocking ring 9 is inserted into the groove 10 end of the other steel pipe. The blocking ring 9 is completely embedded inside the groove 10 and in close contact with the groove wall. At this time, the blocking ring 9 fills the gap between the two, forming the first sealing barrier. At the same time, it limits the axial displacement of the steel pipe through physical limiting. Combined with the interlocking structure of the connecting sleeve 2, it achieves double fixation. The outer second sealing groove 11 and the sealing ring 8 on the inner wall of the first sealing groove 7 of the other steel pipe form a multi-stage sealing structure. When the connecting sleeve 2 is engaged, the sealing ring 8 is squeezed and embedded into the second sealing groove 11, and its elastic deformation fills all the gaps in the groove, forming an annular sealing band. Because the sealing ring 8 and the second sealing groove 11 are equidistantly distributed, multiple independent sealing barriers can be formed at the connection point. Even if one seal fails, the remaining sealing structures can still maintain sealing performance.

[0036] Finally, it should be noted that the above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A hot-dip plastic-coated steel pipe that is easy to assemble, comprising a steel pipe (1), characterized in that: Both ends of the outer side of the steel pipe (1) are fixedly connected to connecting sleeves (2). Both ends of the connecting sleeves (2) are provided with irregular grooves (3). The interior of the irregular grooves (3) is rotatably connected to semi-circular buckles (4). The outer side of the semi-circular buckles (4) and the interior of the irregular grooves (3) are fixedly connected to levers (5). One end of the levers (5) extends to the outer side of the irregular grooves (3). The levers (5) and the irregular grooves (3) are fixedly connected to a return spring (6). The semi-circular buckles (4) are used in conjunction with each other. The connecting sleeves (2) are all semi-circular.

2. The hot-dip plastic-coated steel pipe for easy assembly according to claim 1, characterized in that: One end of the steel pipe (1) is provided with a first sealing groove (7), and a blocking ring (9) is fixedly connected inside the first sealing groove (7). The end of the steel pipe (1) away from the first sealing groove (7) is provided with a groove (10), and the groove (10) is used in conjunction with the blocking ring (9).

3. The hot-dip plastic-coated steel pipe for easy assembly according to claim 2, characterized in that: The steel pipe (1) has a second sealing groove (11) equidistantly opened at one end of its outer side. The inner wall of the first sealing groove (7) is fixedly connected with a sealing ring (8) equidistantly. The sealing ring (8) is used in conjunction with the second sealing groove (11).

4. The hot-dip plastic-coated steel pipe for easy assembly according to claim 1, characterized in that: The lever (5) extends to one end outside the groove (3) and is fixedly connected to an anti-slip protrusion.

5. A hot-dip plastic-coated steel pipe for easy assembly according to claim 2, characterized in that: The blocking ring (9) is an elastic rubber ring, and the outer side of the blocking ring (9) is provided with an inclined guide surface.

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