PSP steel-plastic composite pipe protective sleeve

Abstract

The utility model belongs to the technical field of composite pipes, and relates to a PSP steel-plastic composite pipe protective sleeve. The PSP steel-plastic composite pipe comprises a PSP steel-plastic composite pipe body, and the PSP steel-plastic composite pipe body is composed of an inner plastic layer, a hot melt adhesive layer, a steel pipe layer and an outer plastic layer. The honeycomb interlayer buffering assembly and the memory alloy energy-absorbing piece are matched with each other, external force impact energy can be effectively absorbed and dispersed, when external force impact occurs, the honeycomb hole grooves of the honeycomb sleeve plate firstly play a buffering role and disperse impact force, and the foaming silica gel buffering layer further absorbs energy and provides soft buffering protection. And the shape memory alloy ring absorbs energy in the process of restoring to the original shape after deformation by utilizing the shape memory effect and high elasticity of the shape memory alloy ring, so that the impact resistance of the protective sleeve is greatly improved, and the PSP steel-plastic composite pipe main body is effectively protected.

Description

Technical Field

[0001] This utility model belongs to the field of composite pipe technology and relates to a protective sleeve for PSP steel-plastic composite pipe. Background Technology

[0002] PSP steel-plastic composite pipes combine the advantages of steel and plastic pipes, possessing excellent corrosion resistance, mechanical strength, and hygienic properties, and are widely used in construction, municipal engineering, and chemical industries. However, during transportation, installation, and use, PSP steel-plastic composite pipes are susceptible to external impacts, abrasion, and environmental factors, leading to pipe damage and affecting their service life and performance. Existing protective sleeve structures are relatively simple, with poor buffering and energy absorption effects, unable to effectively cope with complex external forces, and their installation and positioning methods are not convenient or stable enough to meet practical application requirements. Therefore, a new type of protective sleeve for PSP steel-plastic composite pipes needs to be designed to solve the above problems.

[0003] To overcome the shortcomings of existing technologies, people have continuously explored and proposed various solutions. For example, Chinese patent discloses a PSP steel-plastic composite pipe [application number: 202322165491.2], which includes a first pipe and a second pipe, as well as a connecting pipe. The first and second pipes have flared ends facing each other. The connecting pipe has arc-shaped clamping pipes that fit the flared ends fixedly connected to both ends. A first collar fitted to the flared end is fitted on the side of the first pipe, and a second collar fitted to the flared end is fitted on the side of the second pipe. A first fixing ring is fixedly connected to the side of the first collar, and a second fixing ring is fixedly connected to the side of the second collar. A connecting bolt is provided between the first fixing ring and the second fixing ring, and a pre-compression unit is provided between the first fixing ring and the second fixing ring. However, during transportation, installation, and use, the PSP steel-plastic composite pipe is still susceptible to external impact, wear, and environmental factors, leading to pipe damage, affecting its service life and performance. It also has shortcomings such as poor buffering and energy absorption effect, inability to effectively cope with complex external forces, and inconvenient and unstable installation and positioning methods. Summary of the Invention

[0004] The purpose of this utility model is to address the above-mentioned problems by providing a protective sleeve for PSP steel-plastic composite pipes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A protective sleeve for a PSP steel-plastic composite pipe includes a PSP steel-plastic composite pipe body, which is composed of an inner plastic layer, a hot melt adhesive layer, a steel pipe layer, and an outer plastic layer. Protective sleeve alignment components and corresponding protective sleeve bodies are provided at both ends of the PSP steel-plastic composite pipe body. A clamp tensioning and fixing component is fitted at the tail end of the protective sleeve body. A honeycomb sandwich buffer assembly and a shape memory alloy energy-absorbing component are provided inside the protective sleeve body, with the positions of the honeycomb sandwich buffer assembly and the shape memory alloy energy-absorbing component corresponding to each other. A connector positioning part is also provided at the head of the protective sleeve body.

[0007] In the above-mentioned PSP steel-plastic composite pipe protective sleeve, the honeycomb sandwich buffer assembly includes a honeycomb sleeve plate disposed in the main body of the protective sleeve, and the honeycomb sleeve plate has honeycomb holes and grooves.

[0008] In the aforementioned PSP steel-plastic composite pipe protective sleeve, the honeycomb sleeve plate is made of 304 stainless steel.

[0009] In the above-mentioned PSP steel-plastic composite pipe protective sleeve, a foamed silicone buffer layer is provided on the inner side of the honeycomb sleeve plate, and the thickness of the foamed silicone buffer layer is greater than the thickness of the honeycomb sleeve plate.

[0010] In the above-mentioned PSP steel-plastic composite pipe protective sleeve, the shape memory alloy energy-absorbing component includes a shape memory alloy ring disposed within the main body of the protective sleeve, and the foamed silicone buffer layer is located between the shape memory alloy ring and the honeycomb sleeve plate.

[0011] In the aforementioned PSP steel-plastic composite pipe protective sleeve, the shape memory alloy ring is made of Ni-Ti alloy material.

[0012] In the above-mentioned protective sleeve for PSP steel-plastic composite pipe, the protective sleeve alignment component includes outer alignment vertical strips disposed at both ends of the main body of PSP steel-plastic composite pipe, and an alignment groove is provided inside the main body of the protective sleeve, wherein the outer alignment vertical strips are engaged with the alignment groove.

[0013] In the above-mentioned PSP steel-plastic composite pipe protective sleeve, the outer alignment vertical strip is provided with an alignment rod, the alignment groove is connected with a rod hole, and the alignment rod and the rod hole are interference fit.

[0014] In the above-mentioned PSP steel-plastic composite pipe protective sleeve, the clamp tensioning and fixing component includes a clamp ring groove provided at the tail of the protective sleeve body, a clamp sleeve is installed on the clamp ring groove, and the clamp sleeve is tensioned and fixed by bolts and nuts.

[0015] In the above-mentioned PSP steel-plastic composite pipe protective sleeve, the joint positioning part includes a positioning ring groove provided at the head of the protective sleeve body, and the inner side of the protective sleeve body has an internal thread.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. The honeycomb sandwich buffer component and the shape memory alloy energy absorber in this utility model work together to effectively absorb and disperse the impact energy of external forces. When subjected to external impact, the honeycomb holes and grooves of the honeycomb sleeve plate first play a buffering role and disperse the impact force. The foamed silicone buffer layer further absorbs energy and provides soft buffer protection. The shape memory alloy ring, with its shape memory effect and high elasticity, absorbs energy in the process of restoring its original shape after deformation, which greatly improves the impact resistance of the protective sleeve and effectively protects the main body of the PSP steel-plastic composite pipe.

[0018] 2. This utility model uses a snap-fit ​​connection between the protective sleeve alignment component and the protective sleeve body, which makes installation convenient and positioning accurate. The snap-fit ​​between the outer alignment vertical strip and the alignment groove, as well as the interference fit between the alignment rod and the rod hole, ensures a stable connection between the protective sleeve body and the PSP steel-plastic composite pipe body, preventing displacement of the protective sleeve during transportation and use.

[0019] 3. The positioning ring groove and internal thread design of the joint positioning part in this utility model facilitate positioning during pipe connection and connection with other pipe fittings, thereby improving the convenience of installation and the stability of connection.

[0020] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 yes Figure 1 Enlarged diagram of point A in the middle.

[0023] Figure 3 This is a cross-sectional schematic diagram of the main body of the protective sleeve.

[0024] In the diagram: 1. PSP steel-plastic composite pipe body; 2. Inner plastic layer; 3. Hot melt adhesive layer; 4. Steel pipe layer; 5. Outer plastic layer; 6. Protective sleeve alignment component; 7. Protective sleeve body; 8. Clamp tensioning and fixing component; 9. Honeycomb sandwich buffer assembly; 10. Shape memory alloy energy-absorbing component; 11. Joint positioning part; 12. Honeycomb sleeve plate; 13. Honeycomb groove; 14. Foamed silicone buffer layer; 15. Shape memory alloy ring; 16. Outer alignment vertical strip; 17. Alignment groove; 18. Alignment insertion rod; 19. Insertion rod hole; 20. Clamp ring groove; 21. Clamp sleeve; 22. Positioning ring groove. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] like Figure 1-3 As shown, a protective sleeve for a PSP steel-plastic composite pipe includes a PSP steel-plastic composite pipe body 1. The PSP steel-plastic composite pipe body 1 is composed of an inner plastic layer 2, a hot melt adhesive layer 3, a steel pipe layer 4, and an outer plastic layer 5. The PSP steel-plastic composite pipe body 1 has protective sleeve alignment parts 6 and protective sleeve bodies 7 that are engaged with the protective sleeve alignment parts 6 at both ends. The tail of the protective sleeve body 7 is fitted with a clamp tensioning and fixing part 8. The protective sleeve body 7 is provided with a honeycomb sandwich buffer assembly 9 and a shape memory alloy energy-absorbing part 10 inside. The positions of the honeycomb sandwich buffer assembly 9 and the shape memory alloy energy-absorbing part 10 are corresponding. The head of the protective sleeve body 7 is also provided with a joint positioning part 11.

[0027] In this embodiment, the protective sleeve alignment component 6 is fixed at both ends of the PSP steel-plastic composite pipe body 1 and connected to the protective sleeve body 7, which can be snapped together, to achieve initial installation and positioning. The clamp tensioning and fixing component 8 fitted at the tail of the protective sleeve body 7 ensures that the protective sleeve body 7 fits tightly against the PSP steel-plastic composite pipe body 1 through a tightening operation. The honeycomb sandwich buffer component 9 and the shape memory alloy energy-absorbing component 10 inside the protective sleeve body 7 are positioned correspondingly and jointly undertake the task of buffering and absorbing energy. The joint positioning part 11 at the head of the protective sleeve body 7 is used for positioning and operation during pipe connection. The overall structural design realizes all-round and multi-layer protection for the PSP steel-plastic composite pipe body 1. From the convenience of installation and positioning to the impact protection during use and the convenience of pipe connection, it meets the protection needs of PSP steel-plastic composite pipe in the entire process of transportation, installation and use, effectively extending the service life of the pipe and improving the reliability of engineering applications.

[0028] Combination Figure 1 , Figure 2 As shown, the honeycomb sandwich buffer assembly 9 includes a honeycomb sleeve plate 12 disposed within the protective sleeve body 7, the honeycomb sleeve plate 12 having honeycomb slots 13, and the honeycomb sleeve plate 12 being made of 304 stainless steel.

[0029] In this embodiment, when an external force impacts the protective sleeve body 7, the impact force first acts on the honeycomb sleeve plate 12. The unique geometry of the honeycomb holes 13 disperses the concentrated impact force in all directions, reducing the force on a single point. The mechanical properties of the honeycomb structure enable it to achieve efficient energy dispersion with a small amount of material when subjected to impact, significantly improving the impact resistance of the protective sleeve body 7 and providing the first reliable buffer protection barrier for the PSP steel-plastic composite pipe body 1. The honeycomb sleeve plate 12 is made of 304 stainless steel. 304 stainless steel has good strength and can maintain its structural integrity when subjected to impact, and is not easily deformed or failed. At the same time, it has excellent corrosion resistance and can adapt to various complex operating environments, such as humid, acid and alkali scenarios, to ensure the long-term stable operation of the honeycomb sleeve plate 12.

[0030] The inner side of the honeycomb sleeve plate 12 is provided with a foamed silicone buffer layer 14, and the thickness of the foamed silicone buffer layer 14 is greater than the thickness of the honeycomb sleeve plate 12.

[0031] In this embodiment, the foamed silicone buffer layer 14 utilizes its softness and good elasticity to further absorb the remaining impact energy, converting the impact force into its own deformation energy, thereby mitigating the impact on the PSP steel-plastic composite pipe body 1 and achieving high collision energy absorption efficiency.

[0032] Combination Figure 2 As shown, the shape memory alloy energy-absorbing component 10 includes a shape memory alloy ring 15 disposed within the protective sleeve body 7, and the foamed silicone buffer layer 14 is located between the shape memory alloy ring 15 and the honeycomb sleeve plate 12. The shape memory alloy ring 15 is made of Ni-Ti alloy material.

[0033] In this embodiment, under impact, the honeycomb sleeve 12 and the foamed silicone buffer layer 14 first provide cushioning, and then the shape memory alloy ring 15 deforms under force, absorbing a large amount of energy using its high elasticity. After the impact, the shape memory alloy ring 15 recovers its original shape due to the shape memory effect and absorbs energy again. The unique properties of the shape memory alloy ring 15, in conjunction with the honeycomb sandwich buffer component 9, greatly improve the impact toughness of the protective sleeve, enabling it to withstand multiple, high-intensity impacts, providing all-round protection for the PSP steel-plastic composite pipe body 1, and broadening the application scenarios of the pipeline. The shape memory alloy ring 15 is made of Ni-Ti alloy material. Ni-Ti alloy has a stable and excellent shape memory effect, a phase transformation temperature of 35°C, and undergoes a martensitic phase transformation to absorb energy when subjected to external impact. It automatically recovers its original shape at room temperature and also has good energy absorption characteristics and fatigue resistance, allowing it to work stably even under repeated impacts.

[0034] The protective sleeve alignment component 6 includes outer alignment vertical strips 16 disposed at both ends of the PSP steel-plastic composite pipe body 1, and an alignment groove 17 is provided inside the protective sleeve body 7. The outer alignment vertical strips 16 and the alignment groove 17 are engaged and cooperated.

[0035] In this embodiment, during installation, the outer alignment vertical strip 16 is aligned with the alignment groove 17 and inserted to achieve initial positioning, restricting the partial movement of the protective sleeve body 7 in the circumferential and axial directions. This snap-fit ​​method is simple to operate and accurate in positioning, which greatly improves the installation efficiency of the protective sleeve and ensures that the protective sleeve body 7 is quickly and accurately connected to the PSP steel-plastic composite pipe body 1, laying the foundation for subsequent fastening operations.

[0036] Combination Figure 2-3 As shown, the outer alignment vertical bar 16 is provided with an alignment rod 18, and the alignment groove 17 is connected to a rod hole 19. The alignment rod 18 and the rod hole 19 are interference fit.

[0037] In this embodiment, after the outer alignment vertical bar 16 and alignment groove 17 are initially engaged, the alignment rod 18 is inserted into the rod hole 19. The friction generated by the interference fit further enhances the stability of the connection and prevents relative displacement between the protective sleeve body 7 and the PSP steel-plastic composite pipe body 1. The interference fit rod structure makes the connection between the protective sleeve body 7 and the PSP steel-plastic composite pipe body 1 more secure and reliable, effectively preventing the protective sleeve from loosening due to vibration and collision during transportation and construction, and ensuring the protective effect.

[0038] Combination Figure 1 , Figure 2 As shown, the clamp tensioning and fixing component 8 includes a clamp ring groove 20 disposed at the tail of the protective sleeve body 7, and a clamp sleeve 21 is mounted on the clamp ring groove 20. The clamp sleeve 21 is tensioned and fixed by bolts and nuts.

[0039] In this embodiment, after the protective sleeve body 7 is initially installed onto the PSP steel-plastic composite pipe body 1, the clamp sleeve 21 is fitted onto the clamp ring groove 20, and the bolts and nuts are tightened to tighten the clamp sleeve 21, thereby firmly fixing the protective sleeve body 7 onto the PSP steel-plastic composite pipe body 1. The clamp tensioning and fixing method further strengthens the connection between the protective sleeve body 7 and the PSP steel-plastic composite pipe body 1, ensuring that the protective sleeve always fits tightly against the pipe during long-term use, enhancing the reliability and stability of protection, and effectively resisting the influence of external factors on the pipe.

[0040] Combination Figure 2 As shown, the connector positioning part 11 includes a positioning ring groove 22 disposed on the head of the protective sleeve body 7, and the inner side of the protective sleeve body 7 has an internal thread.

[0041] In this embodiment, when connecting pipes, the corresponding part of the fitting to be connected is aligned with the positioning ring groove 22 to achieve quick positioning. Then, the fitting is threaded together with the internal thread to complete the pipe splicing. The design of the positioning ring groove 22 and the internal thread significantly improves the convenience and accuracy of pipe connection, reduces installation difficulty, improves construction efficiency, and at the same time ensures the sealing and stability of the connection, ensuring the normal operation of the pipeline system.

[0042] The working principle of this utility model is as follows:

[0043] During the actual installation of the PSP steel-plastic composite pipe protective sleeve, align the alignment groove 17 inside the protective sleeve body 7 with the outer alignment vertical strip 16 on the PSP steel-plastic composite pipe body 1 and engage them. Simultaneously, insert the alignment rod 18 on the outer alignment vertical strip 16 into the rod hole 19 in the alignment groove 17, achieving initial fixation through interference fit. Then, move the protective sleeve body 7 along the PSP steel-plastic composite pipe body 1 until it covers the area requiring protection. Next, install the clamp sleeve 21 on the clamp ring groove 20 at the tail of the protective sleeve body 7, and tighten the clamp sleeve 21 using bolts and nuts to ensure the protective sleeve body 7 fits tightly against the PSP steel-plastic composite pipe body 1. When connecting pipes, use the positioning ring groove 22 at the head of the protective sleeve body 7 for positioning, and connect to other pipe fittings through the internal threads on the inner side of the protective sleeve body 7.

[0044] When an external force impacts the protective sleeve body 7, the impact force first acts on the honeycomb sleeve plate 12. The unique geometry of the honeycomb grooves 13 disperses the concentrated impact force in all directions, reducing the force on a single point. The mechanical properties of the honeycomb structure enable it to achieve efficient energy dispersion with a small amount of material when subjected to impact, significantly improving the impact resistance of the protective sleeve body 7. This provides the first reliable buffer protection barrier for the PSP steel-plastic composite pipe body 1. The honeycomb sleeve plate 12 is made of 304 stainless steel. 304 stainless steel has good strength and can maintain its structural integrity when subjected to impact, without easily deforming or failing. At the same time, it has excellent corrosion resistance and can adapt to various complex operating environments, such as humid, acidic, and alkaline environments, ensuring the long-term stable operation of the honeycomb sleeve plate 12.

[0045] The foamed silicone buffer layer 14 utilizes its softness and good elasticity to further absorb the remaining impact energy, converting the impact force into its own deformation energy, thus mitigating the impact on the PSP steel-plastic composite pipe body 1. It exhibits high collision energy absorption efficiency.

[0046] Under impact, the honeycomb sleeve 12 and the foamed silicone buffer layer 14 first provide buffering, and then the shape memory alloy ring 15 deforms under force, absorbing a large amount of energy with its high elasticity. After the impact, the shape memory alloy ring 15 returns to its original shape due to the shape memory effect and absorbs energy again. The unique properties of the shape memory alloy ring 15, together with the honeycomb sandwich buffer component 9, greatly improve the impact toughness of the protective sleeve, enabling it to withstand multiple, high-intensity impacts, providing all-round protection for the PSP steel-plastic composite pipe body 1, and expanding the application scenarios of the pipeline. The shape memory alloy ring 15 is made of Ni-Ti alloy material. Ni-Ti alloy has a stable and excellent shape memory effect with a phase transformation temperature of 35℃. When it encounters external force impact, it undergoes a martensitic phase transformation to absorb energy and automatically returns to its original shape at room temperature. It also has good energy absorption characteristics and fatigue resistance, and can work stably even under repeated impacts.

[0047] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model.

[0048] Although this document frequently uses terms such as PSP steel-plastic composite pipe body 1, inner plastic layer 2, hot melt adhesive layer 3, steel pipe layer 4, outer plastic layer 5, protective sleeve alignment component 6, protective sleeve body 7, clamp tensioning and fixing component 8, honeycomb sandwich buffer assembly 9, shape memory alloy energy-absorbing component 10, joint positioning part 11, honeycomb sleeve plate 12, honeycomb hole groove 13, foamed silicone buffer layer 14, shape memory alloy ring 15, outer alignment vertical strip 16, alignment groove 17, alignment insertion rod 18, insertion rod hole 19, clamp ring groove 20, clamp sleeve 21, positioning ring groove 22, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A protective sleeve for a PSP steel-plastic composite pipe, comprising a PSP steel-plastic composite pipe body (1), wherein the PSP steel-plastic composite pipe body (1) is composed of an inner plastic layer (2), a hot melt adhesive layer (3), a steel pipe layer (4), and an outer plastic layer (5), characterized in that, The PSP steel-plastic composite pipe body (1) has protective sleeve alignment parts (6) and protective sleeve body (7) that are engaged with the protective sleeve alignment parts (6) at both ends. The tail of the protective sleeve body (7) is fitted with a clamp tensioning and fixing part (8). The protective sleeve body (7) is provided with a honeycomb sandwich buffer assembly (9) and a memory alloy energy absorber (10) inside. The positions of the honeycomb sandwich buffer assembly (9) and the memory alloy energy absorber (10) are corresponding. The head of the protective sleeve body (7) is also provided with a joint positioning part (11).

2. The protective sleeve for PSP steel-plastic composite pipe according to claim 1, characterized in that, The honeycomb sandwich buffer assembly (9) includes a honeycomb sleeve plate (12) disposed in the protective sleeve body (7), and the honeycomb sleeve plate (12) has honeycomb slots (13) inside.

3. A protective sleeve for a PSP steel-plastic composite pipe according to claim 2, characterized in that, The honeycomb panel (12) is made of 304 stainless steel.

4. A protective sleeve for a PSP steel-plastic composite pipe according to claim 3, characterized in that, The inner side of the honeycomb sleeve plate (12) is provided with a foamed silicone buffer layer (14), and the thickness of the foamed silicone buffer layer (14) is greater than the thickness of the honeycomb sleeve plate (12).

5. A protective sleeve for a PSP steel-plastic composite pipe according to claim 4, characterized in that, The shape memory alloy energy-absorbing component (10) includes a shape memory alloy ring (15) disposed in the protective sleeve body (7), and the foamed silicone buffer layer (14) is located between the shape memory alloy ring (15) and the honeycomb sleeve plate (12).

6. A protective sleeve for a PSP steel-plastic composite pipe according to claim 5, characterized in that, The shape memory alloy ring (15) is made of Ni-Ti alloy material.

7. A protective sleeve for a PSP steel-plastic composite pipe according to claim 6, characterized in that, The protective sleeve alignment component (6) includes outer alignment vertical strips (16) disposed at both ends of the PSP steel-plastic composite pipe body (1), and an alignment groove (17) is provided inside the protective sleeve body (7), and the outer alignment vertical strips (16) and the alignment groove (17) are engaged and matched.

8. A protective sleeve for a PSP steel-plastic composite pipe according to claim 7, characterized in that, The outer alignment vertical bar (16) is provided with an alignment rod (18), and the alignment groove (17) is connected to a rod hole (19). The alignment rod (18) and the rod hole (19) are interference fit.

9. A protective sleeve for a PSP steel-plastic composite pipe according to claim 8, characterized in that, The clamp tensioning and fixing component (8) includes a clamp ring groove (20) located at the tail of the protective sleeve body (7), and a clamp sleeve (21) is installed on the clamp ring groove (20). The clamp sleeve (21) is tensioned and fixed by bolts and nuts.

10. A protective sleeve for a PSP steel-plastic composite pipe according to claim 9, characterized in that, The connector positioning part (11) includes a positioning ring groove (22) disposed on the head of the protective sleeve body (7), and the inner side of the protective sleeve body (7) has an internal thread.

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