Double-seal connecting structure of composite pipe

Abstract

The double-seal connecting structure of the composite pipe comprises a socket and spigot cylinder and a seal connecting cylinder, and an annular insert is arranged on the inner wall of a cylinder body of the socket and spigot cylinder; the sealing connecting cylinder is sleeved and fixed by an annular insert and comprises annular grooves symmetrically distributed in the outer walls of the two ends of the sealing connecting cylinder, a sealing piece is installed in each annular groove, and an annular gap is formed in one end of each side of the socket and spigot cylinder and the sealing connecting cylinder and used for insertion of the composite pipe. According to the connecting structure, the annular gap formed in the mode that the socket and spigot joint cylinder and the sealing connecting cylinder are connected in a sleeved mode serves as the embedding and inserting connection position of the composite pipe, the sealing connecting cylinder serves as a middle pipeline, one end of the composite pipe in contact connection with the sealing connecting cylinder is effectively sealed through the annular groove of the sealing connecting cylinder and the sealing piece, and the water channeling and water seepage phenomena are avoided.

Description

Technical Field

[0001] The present application relates to the technical field of pipeline connection, and in particular to a double-sealed connection structure of a composite pipe. Background Art

[0002] In the field of modern industrial and civil construction, composite pressure-bearing pipes have gradually become the first choice to replace traditional materials with their unique performance advantages. Compared with traditional steel pipes that are easy to corrode and heavy, and pure plastic pipes that are limited in strength and temperature resistance, composite pipes have excellent comprehensive performance - including enhanced mechanical strength, excellent corrosion resistance and long-term stability, and are widely used in building water supply and drainage, oil and gas transportation, chemical industry and other fields. However, a significant problem in the practical application of composite pipeline technology is that composite pipelines are made of different materials stacked or bonded, and the interface treatment between these materials becomes the key. Existing manufacturing processes often make it difficult to achieve perfect fusion between materials, especially in the area where the end of the pipeline contacts the fluid. This incomplete fusion is easy to become a weak point for fluid penetration. The accumulation of infiltrated fluid inside can cause secondary problems such as bulging and delamination. In severe cases, it may even cause the composite layer to peel off and the overall strength of the pipeline to decrease, eventually causing water seepage and even rupture, seriously affecting the safety and service life of the pipeline system.

[0003] In response to the above problems, the existing industry response measures are mostly local reinforcement or simple edge sealing treatment, but these methods cannot fundamentally solve the hidden dangers of water leakage at the connection ends of composite pipes, and in most cases no effective protective measures are taken, so that the problem of pipeline seepage remains prominent, affecting the reliability and maintenance cost of the pipeline system.

[0004] In view of this, it is necessary to propose a connection structure for composite pipes to ensure the sealing and stability of the connection ends of the composite pipes, solve the problem of water seepage, and ensure high-quality sealing of the pipe connection parts, thereby extending the service life of the composite pipes and improving the operating efficiency and safety of the entire pipeline system. Utility Model Content

[0005] The main purpose of the present application is to provide a double-sealed connection structure for a composite pipe, aiming to solve the technical problems of poor sealing of the connection ends of existing composite pipes and easy water leakage.

[0006] To achieve the above objectives, the present application proposes a double-sealed connection structure of a composite pipe, the connection structure comprising:

[0007] A socket sleeve, wherein an annular insert is arranged on the inner wall of the socket sleeve;

[0008] The sealing tube is fixed by the annular insert, and includes annular grooves symmetrically distributed on the outer walls of both ends of the sealing tube, and a sealing member is installed in each annular groove.

[0009] An annular gap is formed at one end of each side of the socket sleeve and the sealing connecting sleeve for plugging the composite pipe.

[0010] Optionally, the annular insert is configured as a stepped boss protruding toward the inner diameter of the socket sleeve, and the outer wall of the sealing sleeve is provided with at least one circle of first annular buckles, which are located on one side or both sides close to the annular insert along the connection direction, and are engaged with the boss in a shape-matched manner to fix the relative position of the sealing sleeve and the socket sleeve.

[0011] Optionally, the annular insert is configured as a cushion layer protruding toward the inner diameter of the socket sleeve, the sealing sleeve is formed by splicing at least two sections of sealing sleeves, and the annular grooves and corresponding seals on the outer wall of each section of the sealing sleeve are configured in two or more sections, and the part of each section of the sealing sleeve that is sleeved by the annular insert is fixed and sealed by at least one seal.

[0012] Optionally, a positioning ring is further provided on the inner ring of the cushion layer, and the positioning ring is configured in the form of ridges or grooves, and the positioning ring is used to position at least two sealing sleeves sleeved by the annular insert.

[0013] Optionally, the annular insert is also sleeved with each section of the sealing sleeve via a circle of second annular buckles, and the outer circle of the second annular buckles is openly clamped with the cushion layer.

[0014] Optionally, a positioning ring is further provided on the inner ring of the second annular buckle, and the positioning ring is configured in the form of ridges or grooves, and the positioning ring is used to position at least two sealing sleeves sleeved by the annular insert.

[0015] Optionally, the composite pipe is inserted into the annular gap formed by the socket sleeve and the sealing connecting sleeve in a hot-melt socket-spigot manner.

[0016] Optionally, the sealing member is a sealing rubber ring or a gasket.

[0017] Optionally, the sealing rubber ring is an O-shaped sealing rubber ring or a D-shaped sealing rubber ring.

[0018] Compared with the existing pipe connection structure, the double-seal connection structure of the present application has at least the following beneficial effects: by arranging an annular insert on the inner wall of the socket and fixing the sealing sleeve by sleeve-fitting the annular insert, not only a firm connection between the two components is ensured, but also precise positioning is provided for the installation of the seal, thereby greatly improving the stability and reliability of the seal; the sealing sleeve adopts a symmetrically distributed annular groove and seal design, which is conducive to sealing on both sides of the sealing sleeve, forming an effective seal at the composite pipe connection, avoiding water leakage, and enabling the connection structure to better adapt to composite pipes of different sizes and pressure requirements; at the same time, annular gaps are formed at both ends under the nested design of the socket and the sealing sleeve, which facilitates the insertion and assembly of the composite pipe, simplifies the on-site construction process, and reduces the difficulty and time cost of installation; the connection structure of the present application directly forms an annular gap at the end of the composite pipe instead of relying on fasteners or other external forces to squeeze the connection, thereby reducing the damage that may be caused to the composite material during the docking process, protecting the structural integrity of the pipeline and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 This is a schematic structural diagram of an embodiment of the double sealing connection structure of the present application;

[0021] Figure 2 This is an installation diagram of an embodiment of the double-seal connection structure of the present application;

[0022] Figure 3 A cross-sectional view of an embodiment of the double sealing connection structure of the present application;

[0023] Figure 4 This is a structural schematic diagram of another embodiment of the double sealing connection structure of the present application;

[0024] Figure 5 This is an installation diagram of another embodiment of the double sealing connection structure of the present application;

[0025] Figure 6 A cross-sectional view of another embodiment of the double sealing connection structure of the present application;

[0026] Reference numerals: 1, socket; 2, annular insert; 3, sealing tube; 4, annular groove; 5, sealing member; 6, first annular buckle; 7, positioning ring; 8, second annular buckle; 9, composite pipe;

[0027] 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

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] like Figure 1The figure shows a double-sealed connection structure of a composite pipe 9, which includes: a socket 1, on the inner wall of which is disposed an annular insert 2; a sealing connecting tube 3, which is sleeved and fixed by the annular insert 2, and includes annular grooves 4 symmetrically distributed on the outer walls of both ends of the sealing connecting tube 3, each of which is equipped with a sealing member 5, and an annular gap is formed on each side end of the socket 1 and the sealing connecting tube 3 for plugging in the composite pipe 9.

[0033] The double-seal connection structure of the present application is a double-tube interlocking sleeve connection method, in which a gap is formed between the two tubes as the connection and installation position of the composite pipe 9, wherein the socket tube 1 serves as the outer tube body, and the inner wall of the socket tube 1 is provided with an annular insert 2. The structural form of the annular insert 2 can be various annular bodies that are completely circumferentially along the inner wall of the socket tube 1. The simplest form is a circle of protrusions on the inner wall of the socket tube 1. See the implementation method described later for details.

[0034] The sealing sleeve 3 is provided as an intermediate piece for connecting two sections of composite pipe 9, and is sleeved and fixed by the above-mentioned annular insert 2. In order to ensure the sealed connection and fixation of the composite pipe 9 and the connection structure of the present application, the sealing cylinder body abuts against the composite pipe 9 in the form of an annular groove 4 and a sealing member 5. This structure is easy to disassemble and install in the entire connection structure, has good sealing and fixing effects, and is low in cost.

[0035] The present application provides two types of interlocking sleeve connection methods of the socket sleeve 1 and the sealing sleeve 3, which realize the assembly of the connection structure through different structures and can provide the composite pipe 9 for interlocking connection, as follows:

[0036] In one embodiment, the annular insert 2 is configured as a stepped boss protruding toward the inner diameter of the socket sleeve 1, and the outer wall of the sealing sleeve 3 is provided with at least one circle of first annular buckle 6, and the first annular buckle 6 is located on one side or both sides close to the annular insert 2 along the connection direction, and is engaged with the boss in a shape-matched manner to fix the relative position of the sealing sleeve 3 and the socket sleeve 1.

[0037] The annular insert 2 in this embodiment is a deformation of the simplest protrusion structure - a trapezoidal protrusion. This structure, together with the annular buckle set on the sealing sleeve 3, can fix the sealing sleeve 3 relative to the annular insert 2 to prevent the sealing sleeve 3 from sliding or loosening in the axial direction due to fluid impact.

[0038] When in use, the two sections of composite pipe 9 are respectively pressed Figure 2 Insert the socket 1 and the sealing connection tube 3 into the gap formed between the socket 1 and the sealing connection tube 3, inside the connection structure, as shown in the figure. Figure 3As shown, the outer wall of the composite pipe 9 contacts the inner wall of the socket 1 , and the inner wall of the composite pipe 9 contacts the outer wall of the sealing connecting tube 3 , and under the action of the seal 5 , the contact effect is tight and stable.

[0039] In another embodiment, the annular insert 2 is configured as a cushion layer protruding toward the inner diameter of the socket sleeve 1, the sealing sleeve 3 is spliced ​​by at least two sections of sealing sleeves, and the annular groove 4 and the corresponding seal 5 on the outer wall of each section of the sealing sleeve are configured in two or more, and the part of each section of the sealing sleeve that is sleeved by the annular insert 2 is fixed and sealed by at least one seal 5.

[0040] The annular insert 2 is arranged in the form of a cushion layer, which can also form a sleeve fixing effect on the sealing sleeve 3. In this embodiment, the sealing sleeve 3 is used in a splicing manner. Figure 4 Specifically, two or more sealing sleeves are used to be spliced ​​in the cushion layer; taking two sealing sleeves as an example, each sealing sleeve is provided with an annular groove 4 and a sealing member 5 at both ends. Figure 5 As shown, the socket sleeve 1 is inserted into a complete sealing sleeve 3, and the two sealing sleeves are sleeved in the cushion layer. Each sealing sleeve has a set of annular grooves 4 and a sealing member 5 that contacts the cushion layer to form a fixed seal (see Figure 6 ), compared with the previous embodiment, the sealing and fixing effect of the sealing sleeve 3 and the annular insert 2 in this embodiment is no longer in the form of a snap, but in the form of an annular groove 4 and a sealing member 5. This structure is conducive to the installation and disassembly of the connection structure, and has better anti-seepage and anti-water leakage effects.

[0041] Furthermore, based on the above embodiment, a positioning ring 7 is further provided on the inner ring of the cushion layer. The positioning ring 7 is configured in the form of ridges or grooves. The positioning ring 7 is used to position at least two sealing sleeves sleeved by the annular insert 2.

[0042] By providing the positioning ring 7, the sealing sleeve can find the correct position during the splicing process to avoid uneven force due to poor installation position of one end or a section of the sealing sleeve, thereby preventing the risk of falling off; and the form of ridges and grooves provides perceptible characteristics of the installation process, such as a clear sense of frustration when it hits the ridges or gets stuck in the grooves.

[0043] Furthermore, the annular insert 2 is also sleeved with each section of the sealing sleeve via a circle of second annular buckle 8, and the outer circle of the second annular buckle 8 is openly engaged with the cushion layer.

[0044] See also Figure 4 and Figure 6The second annular buckle 8 is provided as an intermediate connecting piece between the sealing sleeve and the annular insert 2, and its functions include improving stability by increasing the contact area between the second annular buckle 8 and the sealing sleeve, or providing more contact fixing positions for the sealing member 5 to improve the fixed sealing effect between the sealing sleeve 3 and the annular insert 2 (i.e., the cushion layer).

[0045] Similarly, a positioning ring 7 is also provided on the inner ring of the second annular buckle 8 . The positioning ring 7 is configured in the form of ridges or grooves. The positioning ring 7 is used to position at least two sealing sleeves sleeved by the annular insert 2 .

[0046] In some embodiments, in order to ensure the firmness and sealing of the connection structure, the composite pipe 9 is inserted into the annular gap formed by the socket sleeve 1 and the sealing connecting sleeve 3 in a hot-melt socket-spigot manner.

[0047] Specifically, the end of the composite pipe 9 is heated to form a molten area, and then inserted into the annular gap formed by the socket 1 and the sealing connecting tube 3. Under the continuous action of heat, the composite pipe 9 and the inner wall of the socket 1 and the outer wall of the sealing connecting tube 3 penetrate and mix with each other, remove the gaps between molecules, and finally recrystallize during the cooling process to form a continuous and strong connection, so as to have better sealing performance and ensure the anti-seepage and anti-water leakage effects.

[0048] In some embodiments, the sealing member 5 is a sealing rubber ring or a gasket.

[0049] Optionally, the sealing rubber ring is an O-shaped sealing rubber ring or a D-shaped sealing rubber ring.

[0050] In some embodiments, the seal 5 is made of a rubber ring with elastic properties. The seal 5 made of this type of material can achieve the aforementioned embodiment of the seal 5 forming abutment contact with the inner wall of the composite pipe 9 after the composite pipe 9 is inserted into the gap between the socket sleeve 1 and the sealing connecting sleeve 3, thereby achieving the effect of sealing and fixing.

[0051] 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 double-sealed connection structure of a composite pipe, characterized in that: The connection structure comprises: A socket sleeve, wherein an annular insert is arranged on the inner wall of the socket sleeve; The sealing tube is fixed by the annular insert, and includes annular grooves symmetrically distributed on the outer walls of both ends of the sealing tube, and a sealing member is installed in each annular groove. An annular gap is formed at one end of each side of the socket sleeve and the sealing connecting sleeve for plugging the composite pipe.

2. The double sealing connection structure according to claim 1, characterized in that: The annular insert is configured as a stepped boss protruding toward the inner diameter of the socket sleeve, and the outer wall of the sealing sleeve is provided with at least one circle of first annular buckles, which are located on one side or both sides close to the annular insert along the connection direction, and are engaged with the boss in a shape-matched manner to fix the relative position of the sealing sleeve and the socket sleeve.

3. The double sealing connection structure according to claim 1, characterized in that: The annular insert is configured as a cushion layer protruding toward the inner diameter of the socket sleeve, the sealing sleeve is formed by splicing at least two sections of sealing sleeves, and the annular grooves and corresponding seals on the outer wall of each section of the sealing sleeve are configured in two or more sections, and the part of each section of the sealing sleeve that is sleeved by the annular insert is fixed and sealed by at least one seal.

4. The double sealing connection structure according to claim 3, characterized in that: A positioning ring is also provided on the inner ring of the cushion layer. The positioning ring is configured in the form of convex ridges or grooves. The positioning ring is used to position at least two sealing sleeves sleeved by the annular insert.

5. The double sealing connection structure according to claim 3, characterized in that: The annular insert is also sleeved with each section of the sealing sleeve through a circle of second annular buckles, and the outer circle of the second annular buckles is openly clamped with the cushion layer.

6. The double sealing connection structure according to claim 5, characterized in that: A positioning ring is also provided on the inner ring of the second annular buckle. The positioning ring is configured in the form of ridges or grooves and is used to position at least two sealing sleeves sleeved by the annular insert.

7. The double sealing connection structure according to claim 1, characterized in that: The composite pipe is inserted into the annular gap formed by the socket sleeve and the sealing connecting sleeve in a hot-melt socket-spigot manner.

8. The double sealing connection structure according to claim 1, characterized in that: The sealing member is a sealing rubber ring or a gasket.

9. The double sealing connection structure according to claim 8, characterized in that: The sealing rubber ring is an O-shaped sealing rubber ring or a D-shaped sealing rubber ring.

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