Composite pipe connecting structure capable of preventing water seepage and enhancing connecting strength
Through the design of the double-layer sleeve and partition ring structure, combined with hot melt insertion technology, the leakage problem of composite pipe connection parts is solved, high-strength, leakage-free joints are achieved, and the sealing performance and stability of the pipeline system are improved. , and easy to operate and low cost.
Patent Information
- Application Number
- CN202421173560.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-27
AI Technical Summary
Composite pipes are prone to leakage problems at the connection parts, which affects the stability and safety of the pipeline system.
The double-layer sleeve design and partition ring structure are adopted, and the composite pipe is connected through hot melt insertion to form a molecular-level fusion joint, and the hot melt residue is processed through the runner and tapered convergence structure to ensure sealing and strength.
It significantly enhances the stability and durability of the connecting structure, effectively prevents moisture or medium penetration, improves sealing performance, ensures high pressure and long-term use sealing, and reduces production costs.
Smart Images
Figure CN222277758U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of pipeline connection, and in particular to a composite pipe connection structure that is water-proof and has enhanced connection strength. Background Art
[0002] Composite pipes, especially PSP steel-plastic composite pressure pipes, play a vital role in modern pipeline engineering because of their composite structures with plastic and metal materials in the inner and outer layers. The original intention of designing such composite materials is to overcome the corrosion problems faced by traditional metal pipes and the pressure-bearing limitations of non-metallic pipes in high-pressure applications. At present, non-metallic pipes such as polyethylene (PE) and polyvinyl chloride (PVC) are widely used due to their excellent corrosion resistance, but their pressure-bearing capacity limits their application in high-pressure transmission systems, usually not exceeding 2MPa. Based on this, composite pipes came into being. By combining high-strength metal wires, strips, plates or fibers with non-metallic materials, the pressure-bearing strength of the pipeline is improved, while the corrosion resistance of non-metallic materials is retained, achieving complementary performance.
[0003] Although composite pipes theoretically solve the dual problems of pressure bearing and corrosion protection, their connection technology has become a new challenge. There is an interface between the reinforced metal or fiber material and the plastic layer in the composite structure, which makes it difficult to achieve a perfect sealing fusion at the connection point like homogeneous materials. Existing connection methods may cause port leakage, water leakage and even pipe bursting under high pressure due to improper interface processing, seriously affecting the stability and safety of the pipeline system.
[0004] Therefore, developing a technology that can ensure efficient and reliable connection between composite pipes and prevent interface leakage has become a key issue that needs to be urgently solved in the current field of composite pipeline applications. Utility Model Content
[0005] The main purpose of the present application is to provide a composite pipe connection structure that is water-proof and has enhanced connection strength, aiming to solve the technical problem of leakage in the existing composite pipe connection technology.
[0006] To achieve the above objectives, the present application proposes a composite pipe connection structure that is water-proof and has enhanced connection strength, and the composite pipe connection structure comprises:
[0007] A first sleeve and a second sleeve, wherein the inner diameter of the first sleeve is greater than the inner diameter of the second sleeve and the second sleeve is coaxial with the first sleeve;
[0008] The first sleeve and the second sleeve are connected by a partition ring, which divides the first annular space formed by the inner wall of the first sleeve and the outer wall of the second sleeve into two sections. One end of a composite pipe is inserted into each section of the first annular space to connect multiple sections of composite pipes.
[0009] Optionally, the inner wall of the first sleeve is provided with a flow channel formed in a radial direction of the first sleeve in the form of protrusions or depressions.
[0010] Optionally, the flow channels are configured in multiple numbers and are evenly distributed along the inner wall of the first sleeve.
[0011] Optionally, the partition ring is configured as two or more in the first annular space along the axial direction of the first sleeve or the second sleeve.
[0012] Optionally, a second annular space formed by outer walls of two ends of the second sleeve and an inner wall of the first sleeve is larger than the first annular space.
[0013] Optionally, the two ends of the second sleeve gradually converge inward in the radial direction, so that the second annular space formed by the outer wall of the second sleeve at the two ends and the inner wall of the inserted composite pipe is enlarged.
[0014] Optionally, the second sleeve has a stepped structure radially inward at both ends, so that the second annular space formed by the outer wall of the second sleeve at both ends and the inner wall of the inserted composite pipe is enlarged.
[0015] Optionally, two ends of the first sleeve expand radially outward to form an outer ring.
[0016] Optionally, both ends of the first sleeve are provided with inclined chamfers facing the first annular space.
[0017] Compared with the existing pipeline connection structure, the connection structure of the present application has at least the following beneficial effects: by adopting a double-layer sleeve design of a first sleeve and a second sleeve, not only the mechanical strength of the connection part is increased, but also the first annular space formed by the inner and outer sleeves is used to provide a more stable embedding environment for the composite pipe, effectively avoiding displacement or falling off under direct external force, and significantly enhancing the stability and durability of the connection structure; and the use of the partition ring divides the first annular space into two independent parts, each of which is inserted with a section of composite pipe, so that a more rigorous sealing structure can be formed in the connection area, even under high pressure or long-term use, it can effectively prevent moisture or other media from penetrating, and improve the sealing performance of the entire pipeline system; the connection structure of the present application can also be used to connect the composite pipe in a hot-melt socket connection. After using a die head to hot-melt the composite pipe connection position, it is inserted into the first annular space of the connection structure, so that each section of the pipe can be fused at the molecular level at the connection to form a high-strength, leak-free joint. Compared with traditional connection methods or other existing pipe connection structures, the connection structure of the present application can better ensure the sealing and integrity of the connection part, and is easy to carry and low in cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.
[0019] Figure 1 It is a cross-sectional schematic diagram of an embodiment of a composite pipe connection structure of the present application;
[0020] Figure 2 for Figure 1 A complete schematic diagram of the composite pipe connection structure;
[0021] Figure 3 A schematic diagram of a composite pipe connection structure according to an embodiment of the present invention and a composite pipe connection state;
[0022] Figure numerals: 1. first sleeve; 2. second sleeve; 3. partition ring; 4. flow channel; 5. first annular space; 6. second annular space; 7. outer ring; 8. composite pipe.
[0023] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0026] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0027] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0028] Based on the composite pipe mentioned in the background technology section, this application particularly proposes a connection structure that is prone to leakage when the pipe ends are connected by combining high-strength metal wires, strips, plates or fibers with non-metallic materials:
[0029] like Figure 1 , Figure 2 and Figure 3The figure shows a composite pipe connection structure that is waterproof and has enhanced connection strength. The composite pipe connection structure includes: a first sleeve 1 and a second sleeve 2. The inner diameter of the first sleeve 1 is larger than the inner diameter of the second sleeve 2 and the second sleeve 2 is coaxial with the first sleeve 1. The first sleeve 1 and the second sleeve 2 are connected by a partition ring 3. The partition ring 3 divides the first annular space 5 formed by the inner wall of the first sleeve 1 and the outer wall of the second sleeve 2 into two sections. One end of a section of composite pipe 8 is inserted into each section of the first annular space 5 to connect multiple sections of composite pipe 8.
[0030] In the connection structure of this embodiment, the first sleeve 1 and the second sleeve 2 are assembled in the form of inner and outer sleeves, and a non-contact space is formed after the first sleeve 1 and the second sleeve 2 are stacked by the inner diameter difference, that is, the first annular space 5 is the embedded installation position of the composite pipe 8, and the second sleeve 2 (inner sleeve) is used to realize the transmission of liquid or medium, thereby completing the connection of the composite pipe 8;
[0031] When in use, the connection structure of the present application can be used for connection by hot-melt socket-spigot method, specifically, the end of the composite pipe 8 is heated and inserted into the first annular space 5, and the two are combined by applying pressure with a welding tool. This connection method can further improve the sealing and integrity of the connection state, is conducive to the realization of the anti-seepage function, and is simple to operate and low in cost;
[0032] In addition, in the first annular space 5, the utility model is also designed with a partition ring 3, and the partition ring 3 has three functions: one is to connect the first sleeve 1 and the second sleeve 2 so that the two are relatively fixed; the second is to divide the first annular space 5 into two independent installation positions in the direction of the tube diameter to prevent the medium in the pipeline from seeping back; the third is to realize the connection of the resistance wire circuit in the first sleeve 1 and the second sleeve 2, and only connect the electric fusion welding machine through the circuit interface outside the first sleeve 1 to melt the inner wall of the first sleeve 1 (the outer wall of the composite pipe 8) and the outer wall of the second sleeve 2 (the inner wall of the composite pipe 8), thereby facilitating the connection operation and reducing the production cost.
[0033] In some embodiments, the partition ring 3 may also be configured in the following manner: two or more partition rings 3 are arranged in the first annular space 5 along the axial direction of the first sleeve 1 or the second sleeve 2 .
[0034] This setting method can not only enhance the connection strength, the pressure-bearing strength of the application, and the load of greater fluid pressure, but also extend the length of the connection structure within a certain range, forming products of different specifications to cope with different connection scenarios of the composite pipe 8, and avoiding material waste caused by only being able to connect by cutting the pipe when the length dimensions do not match.
[0035] Since the connection structure of the present application can be connected by hot-melt socket method, which is commonly used for plastic pipes, during the connection process, as the temperature rises, the plastic materials on the inner surface of the pipe fitting and the outer surface of the pipe begin to melt, forming a molten area. Under the continuous action of heat, the two molten surfaces penetrate and mix with each other, removing the gaps between molecules, and finally recrystallize during the cooling process to form a continuous and strong connection.
[0036] Inevitably, when the composite pipe 8 is connected using the connection structure of the present application, hot melt residue will be generated during the melting process. If this part of the hot melt residue is not processed and accumulates at the connection position, it may cause the connection structure to bulge or even affect the structure. Therefore, based on the above embodiment, see Figure 1 ,
[0037] Optionally, the inner wall of the first sleeve 1 is provided with a flow channel 4 formed in a convex or concave form along the radial direction of the first sleeve 1 .
[0038] The setting of the flow channel 4 is mainly to allow the hot-melt residue in the first annular space 5 to be transferred in a spatial and directional manner to avoid accumulation in the first annular space 5. The setting of the flow channel 4 also increases the volume of the first annular space 5. The groove-type flow channel 4 formed by the protrusions or depressions can provide sufficient atmospheric pressure to the first annular space 5 during melting to allow the hot-melt residue to flow out.
[0039] Furthermore, the flow channels 4 are configured in multiple numbers and are evenly distributed along the inner wall of the first sleeve 1. This arrangement is conducive to gas discharge during hot-melt socket welding, so that the pipe port and the partition ring 3 are closely welded, which is safe and stable.
[0040] In the above-mentioned embodiments and methods, the hot-melt residue is guided to discharge in the form of flow channel 4 in consideration of its influence on the connection. The following scheme will solve the problem of handling this part of the hot-melt residue.
[0041] On the basis of the above-mentioned embodiment, the second annular space 6 formed by the outer walls of the two ends of the second sleeve 2 and the inner wall of the first sleeve 1 is larger than the first annular space 5 .
[0042] This solution accommodates the hot melt residue by increasing the volume of the second annular space 6. As the hot melt residue leaks or overflows from the inside of the first annular space 5, it is time-consuming and laborious to clean it up, and there may be a risk of scalding for the operator. Therefore, this part of the hot melt residue is left on the connection structure, and after cooling and solidification, it can also effectively block the first annular space 5 to avoid leakage. The way to achieve this effect is to increase the volume of the second annular space 6 to form an accommodating space. This application further proposes the following two solutions to achieve this:
[0043] 1. The two ends of the second sleeve 2 gradually shrink and converge inward in the radial direction, so that the second annular space 6 formed by the outer wall of the second sleeve 2 at the two ends and the inner wall of the inserted composite pipe 8 is enlarged.
[0044] Second, the second sleeve 2 has a stepped structure radially inward at both ends (such as Figure 1 , Figure 2 As shown), the second annular space 6 formed by the outer wall of the second sleeve 2 at both ends and the inner wall of the inserted composite pipe 8 is enlarged.
[0045] Regardless of whether it is a gradually converging or stepped volume expansion method, the principle is to increase the cross-sectional area of the second annular space 6 . Both methods can accommodate the hot melt and effectively seal the first annular space 5 .
[0046] In some embodiments, two ends of the first sleeve 1 expand radially outward to form an outer ring 7 .
[0047] The structural design of the outer ring 7 facilitates operation and is labor-saving and simple when the composite pipe 8 is pushed into and withdrawn from the connection space formed by the first sleeve 1 and the second sleeve 2.
[0048] Optionally, both ends of the first sleeve 1 are provided with inclined chamfers facing the first annular space 5 .
[0049] The connection structure of the present application adopts a double-layer sleeve design of a first sleeve 1 and a second sleeve 2, which not only increases the mechanical strength of the connection part, but also uses the first annular space 5 formed by the inner and outer sleeves to provide a more stable embedding environment for the composite pipe 8, effectively avoiding displacement or falling off under direct external force, and significantly enhancing the stability and durability of the connection structure; and the use of the partition ring 3 divides the first annular space 5 into two independent parts, each of which is inserted with a section of the composite pipe 8, so that a more rigorous sealing structure can be formed in the connection area, even under high pressure or long-term use, it can effectively prevent moisture or other media from penetrating, and improve the sealing performance of the entire pipeline system; In addition, the connection structure of the present application can also be used for connection by hot-melt socket method, specifically, the end of the composite pipe 8 is heated and inserted into the first annular space 5, and the two are combined by applying pressure through a welding tool, and each section of the pipe is fused at the molecular level at the connection to form a high-strength, leak-free welded joint. Compared with traditional connection methods or other existing pipe connection structures, the connection structure of the present application can better ensure the sealing and integrity of the connection part, and is easy to operate and low in cost.
[0050] The above description is only an optional embodiment of the present application, and does not limit the patent scope of the present application. All equivalent structural transformations made by using the contents of the present application specification and drawings under the inventive concept of the present application, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present application.
Claims
1. A composite pipe connection structure that prevents water seepage and enhances connection strength, characterized in that: The composite pipe connection structure comprises: A first sleeve and a second sleeve, wherein the inner diameter of the first sleeve is greater than the inner diameter of the second sleeve and the second sleeve is coaxial with the first sleeve; The first sleeve and the second sleeve are connected by a partition ring, and the partition ring divides the first annular space formed by the inner wall of the first sleeve and the outer wall of the second sleeve into two sections. One end of a section of composite pipe is inserted into each section of the first annular space to connect multiple sections of composite pipe.
2. The composite pipe connection structure according to claim 1, characterized in that: The inner wall of the first sleeve is provided with a flow channel formed in a convex or concave form along the radial direction of the first sleeve.
3. The composite pipe connection structure according to claim 2, characterized in that: The flow channels are configured in multiple numbers and are evenly distributed along the inner wall of the first sleeve.
4. The composite pipe connection structure according to claim 1, characterized in that: The partition rings are arranged in two or more in the first annular space along the axial direction of the first sleeve or the second sleeve.
5. The composite pipe connection structure according to claim 1, characterized in that: A second annular space formed by outer walls of two ends of the second sleeve and an inner wall of the first sleeve is larger than the first annular space.
6. The composite pipe connection structure according to claim 5, characterized in that: The two ends of the second sleeve gradually converge inwardly along the radial direction, so that the second annular space formed by the outer wall of the second sleeve at the two ends and the inner wall of the inserted composite pipe is enlarged.
7. The composite pipe connection structure according to claim 5, characterized in that: The second sleeve has a stepped structure radially inward at both ends, so that the second annular space formed by the outer wall of the second sleeve at both ends and the inner wall of the inserted composite pipe is enlarged.
8. The composite pipe connection structure according to claim 1, characterized in that: The two ends of the first sleeve expand radially outward to form an outer ring.
9. The composite pipe connection structure according to claim 1, characterized in that: Both ends of the first sleeve are provided with inclined chamfers facing the first annular space.