Composite pipe press-on connection structure

Abstract

The application discloses a composite pipe buckle pressing type connecting structure, which comprises at least two composite pipes, a connecting head, a buckle pressing snap ring and a connecting piece. The connecting head is used for sleeving on the connecting section of the corresponding composite pipe. A plurality of strip-shaped grooves in the form of annular array are arranged on the connecting head along the axial direction of the connecting head, so as to form a plurality of elastic petals. The inner walls of the elastic petals are all provided with a plurality of reverse teeth for embedding the outer walls of the composite pipes. The buckle pressing snap ring is used for sleeving on the outer walls of the elastic petals of the connecting head, so that the reverse teeth on the inner walls of the elastic petals are embedded in the outer walls of the composite pipes. The connecting piece is used for connecting the two adjacent connecting heads together. The application has the advantages of avoiding the bonding failure problem and improving the sealing durability.

Description

Technical Field

[0001] This application relates to the field of pipe connection technology, and in particular to composite pipe crimp connection structures. Background Technology

[0002] In the existing technology, the connection between composite pipes is usually assembled by installing a joint between the ends of the two pipes. The joint and the pipe are generally connected by adhesive. When used for a long time, the adhesive strength weakens or even fails, causing the gap between the joint and the pipe to become larger and larger, which leads to the failure of the sealing structure and the failure of the fluid medium inside the pipe, affecting the normal use of the pipe. Utility Model Content

[0003] The main purpose of this application is to provide a composite pipe crimp connection structure, which aims to solve the technical problem that the use of adhesive connection in existing composite pipes can easily lead to the failure of the sealing structure.

[0004] To achieve the above objectives, this application provides a composite pipe crimping connection structure, including at least two composite pipes, a connector, a crimping ring, and a connector. The connector is used to fit onto the connecting section of the corresponding composite pipe. The connector has multiple strip-shaped grooves arranged in a ring array along its axial direction to form multiple elastic flaps. The inner wall of each elastic flap has multiple reverse teeth for embedding into the outer wall of the composite pipe. The crimping ring is used to fit onto the outer wall of the multiple elastic flaps of the connector so that the reverse teeth on the inner wall of the elastic flaps are embedded into the outer wall of the composite pipe. The connector is used to connect two adjacent connectors together.

[0005] Optionally, a limiting protrusion is provided on the inner wall of the end of the connector away from the elastic flap, the limiting protrusion being used to fit the end of the composite tube.

[0006] Optionally, it also includes an end shaping head, which is used to temporarily set on the inner wall of the connecting section of the composite pipe during the pre-assembly stage; wherein, the pre-assembly stage is the stage when the connector is sleeved on the connecting section of the composite pipe.

[0007] Optionally, the composite pipe includes an inner base pipe, a middle reinforcing pipe, and an outer covering pipe. The inner base pipe is made of metal or non-metal material. The middle reinforcing pipe is sleeved on the inner base pipe and is made of metal or non-metal material. The outer covering pipe is sleeved on the middle reinforcing pipe and is made of plastic. A connector is sleeved on the outer wall of the outer covering pipe.

[0008] Optionally, the end of the inner base tube extends out to form a flange, which simultaneously fits the ends of the middle reinforcing tube and the outer covering tube, and the flange fits the limiting protrusion.

[0009] Optionally, it also includes an inner sealing insert, which is sealed between the inner walls of the connecting sections of two adjacent composite pipes.

[0010] Optionally, the inner sealing insert is an integral structure. A raised rib is provided in the center of the outer wall of the inner sealing insert. A first sealing ring is provided on both sides of the raised rib and fitted onto the outer wall of the inner sealing insert. The two first sealing rings are respectively attached to the ends of two adjacent composite pipes. Several second sealing rings are also fitted onto the outer wall of the inner sealing insert on both sides of the raised rib. The second sealing rings are attached to the inner wall of the composite pipe.

[0011] Optionally, the inner sealing insert includes two separate inserts. An annular positioning plate is provided on the end of the two separate inserts that are close to each other. The two annular positioning plates are attached between the two connectors. A first sealing ring is provided on the side of the two annular positioning plates that are far apart in an arc and is fitted on the outer wall of the inner sealing insert. The two first sealing rings are respectively attached to the ends of two adjacent composite pipes. Several second sealing rings are fitted on the outer wall of each of the two separate inserts. The second sealing rings are attached to the inner wall of the composite pipe.

[0012] Optionally, the connector is a clamp, and the outer wall of the connector head away from the elastic flap is provided with a step that mates with the clamp.

[0013] Optionally, the connecting parts are flanges that are integrally connected to the connector, and adjacent flanges are connected by a number of bolts.

[0014] The beneficial effects that this application can achieve are as follows: This application includes at least two composite pipes, a connector, a crimping ring, and a connector. The connector is used to fit onto the connecting section of the corresponding composite pipe. The connector has multiple strip grooves arranged in a ring array along its axial direction to form multiple elastic flaps. The inner wall of each elastic flap has multiple reverse teeth for embedding into the outer wall of the composite pipe. The crimping ring is used to fit onto the outer wall of the multiple elastic flaps of the connector so that the reverse teeth on the inner wall of the elastic flaps are embedded into the outer wall of the composite pipe. The connector is used to connect two adjacent connectors together. Based on the connection structure of this application, when two connectors are respectively fitted onto the two composite pipes to be connected, the connectors have a slotted structure with multiple strip grooves along their axial direction, which forms multiple elastic petals with a certain degree of elasticity. The elastic petals can deform radially along the connectors. Then, a crimping ring is fitted onto the multiple elastic petals of the connectors, thereby squeezing the multiple elastic petals to deform and shrink simultaneously, so that the inverted teeth on the inner wall of the elastic petals are embedded in the outer wall of the composite pipe, forming a reliable crimping connection structure. Finally, the two connectors are connected together by a connector to form an integrated pipe connection structure. Therefore, the embedded crimping connection structure adopted in this application not only has better connection reliability, but also overcomes the problem of adhesive failure and improves the durability of sealing. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0016] Figure 1 This is a schematic diagram of a composite pipe crimp connection structure according to an embodiment of this application; Figure 2 This is a schematic diagram of another structure of a composite pipe crimp connection structure in an embodiment of this application; Figure 3 This is a schematic diagram of a composite pipe crimping connection structure without a crimping ring in an embodiment of this application; Figure 4 for Figure 1 A magnified schematic diagram of the local structure at point A; Figure 5 for Figure 1 A magnified view of the structure at point B in the middle; Figure 6 This is a schematic diagram of the connector structure in an embodiment of this application; Figure 7 This is a schematic diagram of a temporary structure during the pre-assembly stage in an embodiment of this application; Figure 8 This is a schematic diagram of the assembly process (clamp type) of a composite pipe crimp connection structure according to an embodiment of this application. Figure 9 This is a schematic diagram of the assembly process (flange type) of a composite pipe crimp connection structure in an embodiment of this application.

[0017] Figure label: 110-Composite pipe, 111-Inner base pipe, 1111-Flanged section, 112-Intermediate reinforcing pipe, 113-Outer covering pipe, 120-Connector, 121-Strip groove, 122-Elastic flap, 123-Reverse tooth, 124-Step, 125-Limiting protrusion ring, 130-Clipping ring, 140-End shaping head, 150-Inner sealing insert, 151-Protruding rib, 152-First sealing ring, 153-Second sealing ring, 154-Split insert, 155-Annular positioning plate, 160-Clamping fitting, 170-Flange.

[0018] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0021] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; 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 communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0023] Example Reference Figures 1-8This embodiment provides a composite pipe crimping connection structure, including at least two composite pipes 110, a connector 120, a crimping ring 130, and a connector. The connector 120 is used to fit onto the connecting section of the corresponding composite pipe 110. The connector 120 has multiple strip grooves 121 arranged in a ring array along its axial direction to form multiple elastic petals 122. The inner wall of each elastic petal 122 has multiple reverse teeth 123 for embedding into the outer wall of the composite pipe 110. The crimping ring 130 is used to fit onto the outer wall of the multiple elastic petals 122 of the connector 120 so that the reverse teeth 123 on the inner wall of the elastic petals 122 are embedded into the outer wall of the composite pipe 110. The connector is used to connect two adjacent connectors 120 together.

[0024] In this embodiment, when two connectors 120 are respectively fitted onto the two composite pipes 110 to be connected, the connectors 120 have a slotted structure with multiple strip grooves 121 along their axial direction, which forms multiple elastic petals 122 with a certain elasticity. The elastic petals 122 can deform radially along the connectors 120. At this time, a clamping ring 130 is fitted onto the multiple elastic petals 122 of the connectors 120, thereby squeezing the multiple elastic petals 122 to deform and shrink simultaneously (the strip grooves 121 provide corresponding compression allowance at this time), so that the inverted teeth 123 on the inner wall of the elastic petal 122 are embedded into the outer wall of the composite pipe 110, forming a reliable clamping connection structure. Finally, the two connectors 120 are connected together by a connector to form an integrated pipe connection structure. Therefore, the embedded clamping connection structure adopted in this embodiment not only has better connection reliability, but also overcomes the problem of adhesive failure and improves the durability of sealing.

[0025] It should be noted that, for ease of assembly, the outer wall of each elastic flap 122 is chamfered, and the inner wall of one end of the clamping ring 130 is also correspondingly chamfered. This allows the chamfered end of the clamping ring 130 to be aligned with the elastic flap 122, facilitating quick attachment of the clamping ring 130 to all elastic flaps 122. A groove can be formed on the outer wall of the clamping ring 130 to facilitate the use of external tools to press the clamping ring 130 into the outer wall of the elastic flap 122, improving the application of force and ease of operation. The outer wall of the composite tube 110 is generally made of plastic, which is suitable for the embedding of the chamfered teeth 123. Multiple chamfered teeth 123 on the inner wall of each elastic flap 122 are arranged sequentially at intervals along its axial direction.

[0026] Additionally, it should be noted that the connection structure with the crimping ring 130 can be prefabricated in the processing plant or temporarily assembled during pipe interruption or emergency repairs in installation projects. The crimping ring 130 can be slidably pressed together using simple tools, making it widely applicable. If prefabricated in the factory, the connector 120 can be directly pressed circumferentially against the outer wall of the composite pipe 110 using mechanical equipment. In this case, the connector 120 can adopt a sleeve structure without the groove 121, and the final assembly will form a pipe connection structure without the crimping ring 130 (e.g., ...). Figure 3 (As shown).

[0027] As an optional implementation, all composite pipes 110 are straight pipes, and multiple straight pipes adopt the connection structure of this embodiment to form a straight-line pipe as a whole.

[0028] As another optional implementation, the composite pipe 110 has at least one elbow pipe and at least two straight pipes. The two ends of the elbow pipe are respectively connected to the straight pipes, and the connection points adopt the connection structure of this embodiment, thereby forming an overall elbow-shaped composite pipe structure (not shown in the figure).

[0029] As another optional implementation, the composite pipe 110 has at least one tee pipe and at least three straight pipes. The ends of the tee pipes are respectively connected to the straight pipes, and the connection points adopt the connection structure of this embodiment, thereby forming a tee-shaped composite pipe structure (not shown in the figure).

[0030] As an optional implementation, a limiting protrusion 125 is provided on the inner wall of the end of the connector 120 away from the elastic flap 122, and the limiting protrusion 125 is used to fit against the end of the composite tube 110.

[0031] In this embodiment, during assembly, by attaching the limiting protrusion 125 to the end of the composite tube 110, the installation position of the connector 120 on the composite tube 110 can be precisely controlled. At the same time, it is convenient to reserve space between the two composite tubes 110 to facilitate subsequent cooperation with other components. The reserved space width is the sum of the thicknesses of the two limiting protrusions 125.

[0032] As an optional implementation, it also includes an end shaping head 140, which is used to temporarily set on the inner wall of the connecting section of the composite pipe 110 during the pre-assembly stage; wherein, the pre-assembly stage is the stage when the connector 120 is sleeved on the connecting section of the composite pipe 110.

[0033] In this embodiment, since the elastic flap 122 will also compress the composite tube 110 when the snap ring 130 is squeezed, in order to avoid damaging the composite tube 110 during the pre-assembly stage, an end shaping head 140 can be temporarily installed on the inner wall of the connecting section of the composite tube 110 to support the inner wall of the composite tube 110, thereby offsetting the external pressure on the composite tube 110 and ensuring that the composite tube 110 will not be damaged during pre-assembly. After assembly, the end shaping head 140 can be removed.

[0034] When all the inverted teeth 123 on the inner wall of the multiple elastic flaps 122 are quickly embedded into the plastic outer wall of the composite pipe 110, the material shrinks locally and generates a certain amount of heat. This heat may cause the composite pipe 110 to deform further. Therefore, as an optional implementation, the end shaping head 140 has a hollow structure inside, and its internal cavity is filled with a cooling medium (usually water). This allows the end shaping head 140 to not only provide support but also cool the composite pipe 110, suppressing deformation caused by excess heat and ensuring the assembly quality of the pipe product.

[0035] It should be noted that inlets and outlets can be provided on both sides of the end shaping head 140 to connect to flexible pipes (not shown in the figure), so that cooling medium can be circulated to ensure the continuous cooling effect of the end shaping head 140. This is more suitable for working conditions where local welding or fusion is required at the pipe connection.

[0036] As an optional implementation, the composite pipe 110 includes an inner base pipe 111, an intermediate reinforcing pipe 112, and an outer covering pipe 113. The inner base pipe 111 is made of metal or non-metal. The intermediate reinforcing pipe 112 is sleeved on the inner base pipe 111 and is also made of metal or non-metal. The outer covering pipe 113 is sleeved on the intermediate reinforcing pipe 112 and is made of plastic. A connector 120 is fitted onto the outer wall of the outer covering pipe 113. The aforementioned metal material can be stainless steel, and the non-metallic material can be a polymer such as polyvinyl chloride (PVC), polyethylene (PE), random copolymer polypropylene (PP-R), and polybutene (PB).

[0037] It should be noted that the connector 120 can be made of the same plastic material as the outer covering tube 113. After its reverse teeth 123 are embedded in the outer wall of the outer covering tube 113, it is conducive to forming a homogeneous material fusion structure and improving the overall structural integrity.

[0038] As an optional implementation, the end of the inner base tube 111 extends out to form a flange 1111, which simultaneously fits the ends of the intermediate reinforcing tube 112 and the outer covering tube 113, and the flange 1111 fits the limiting protrusion 125.

[0039] In this embodiment, by leaving a section of the inner base pipe 111 and bending it, a flange 1111 can be formed that simultaneously covers the ends of the intermediate reinforcing pipe 112 and the outer covering pipe 113, which can effectively reduce the risk of water leakage and delamination in the pipeline and further improve the sealing performance.

[0040] As an optional implementation, it also includes an inner sealing insert 150, which is sealed between the inner walls of the connecting section of two adjacent composite pipes 110. By providing the inner sealing insert 150 at the connection of two adjacent composite pipes 110, the sealing performance can be further improved.

[0041] As an optional implementation, the inner sealing insert 150 is an integral structure. A raised rib 151 is provided in the center of the outer wall of the inner sealing insert 150. A first sealing ring 152 is provided on both sides of the raised rib 151 and fitted onto the outer wall of the inner sealing insert 150. The two first sealing rings 152 respectively fit the ends of two adjacent composite tubes 110. Several second sealing rings 153 are also fitted onto the outer wall of the inner sealing insert 150 on both sides of the raised rib 151. The second sealing rings 153 fit onto the inner wall of the composite tube 110.

[0042] In this embodiment, the rib 151 serves to position the inner sealing insert 150 between the inner walls of two adjacent composite pipes 110. The rib 151 can also be used to seal the contact position of the two connectors 120, thereby improving the sealing performance. In conjunction with the first sealing ring 152 and the second sealing ring 153, multiple sealing effects are formed, thereby achieving a higher sealing level and meeting the requirements for high-level sealing performance.

[0043] As another optional implementation, the inner sealing insert 150 includes two separate inserts 154. Annular positioning plates 155 are provided on the ends of the two separate inserts 154 that are close to each other. The two annular positioning plates 155 are attached between the two connectors 120. A first sealing ring 152 is provided on the side of the two annular positioning plates 155 that are far apart in an arc shape and is sleeved on the outer wall of the inner sealing insert 150. The two first sealing rings 152 are respectively attached to the ends of two adjacent composite pipes 110. A plurality of second sealing rings 153 are sleeved on the outer wall of each of the two separate inserts 154. The second sealing rings 153 are attached to the inner wall of the composite pipe 110.

[0044] In this embodiment, two separate inserts 154 are used, which makes it easy to pre-assemble the separate inserts 154 on one side of the connecting section of the composite pipe 110. After assembly, the annular positioning plate 155 fits against the end face of the connector 120, thereby limiting the installation position of the separate inserts 154 on the inner wall of the composite pipe 110. Then, the two pre-assembled parts with separate inserts 154 are spliced ​​together and fixed. Here, the first sealing ring 152 and the second sealing ring 153 are also used to form a multiple sealing effect.

[0045] As an optional implementation, the connector is a clamp 160, and the outer wall of the connector 120 away from the elastic flap 122 is provided with a step 124 that cooperates with the clamp 160, thereby forming a clamp-type connection and fixing structure.

[0046] As an optional implementation, the connecting parts are flanges 170 that are integrally connected to the connector 120. Adjacent flanges 170 are connected by a number of bolts (not shown in the figure) to form a flange-type connection fixing structure. The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A composite pipe crimp-type connection structure, characterized in that, include: At least two composite pipes; A connector is used to fit onto the connecting section corresponding to the composite pipe. The connector has multiple strip grooves arranged in a ring array along its axial direction to form multiple elastic petals. The inner wall of each elastic petal has multiple inverted teeth for embedding into the outer wall of the composite pipe. A snap-fit ​​ring is used to be sleeved on the outer wall of multiple elastic flaps of the connector so that the reverse teeth of the inner wall of the elastic flaps are embedded in the outer wall of the composite tube. A connector for connecting two adjacent connectors together.

2. The composite pipe crimp connection structure as described in claim 1, characterized in that, A limiting protrusion is provided on the inner wall of the end of the connector away from the elastic flap, and the limiting protrusion is used to fit against the end of the composite tube.

3. The composite pipe crimp connection structure as described in claim 2, characterized in that, It also includes an end shaping head, which is used to temporarily set on the inner wall of the connecting section of the composite pipe during the pre-assembly stage; wherein, the pre-assembly stage is the stage when the connecting head is sleeved on the connecting section of the composite pipe.

4. The composite pipe crimp connection structure as described in claim 2, characterized in that, The composite pipe includes: The inner base tube is made of metal or non-metal materials; An intermediate reinforcing tube is sleeved on the inner base tube, and the intermediate reinforcing tube is made of metal or non-metal materials. An outer covering tube is sleeved on the intermediate reinforcing tube. The outer covering tube is made of plastic, and the connector is sleeved on the outer wall of the outer covering tube.

5. The composite pipe crimp connection structure as described in claim 4, characterized in that, The end of the inner base tube extends out to form a flange, which simultaneously fits the ends of the middle reinforcing tube and the outer covering tube, and the flange fits the limiting protrusion.

6. The composite pipe crimp connection structure as described in claim 1, characterized in that, It also includes an inner sealing insert, which is sealed between the inner walls of the connecting sections of two adjacent composite pipes.

7. The composite pipe crimp connection structure as described in claim 6, characterized in that, The inner sealing insert is an integral structure. A raised rib is provided in the center of the outer wall of the inner sealing insert. A first sealing ring is provided on both sides of the raised rib and fitted onto the outer wall of the inner sealing insert. The two first sealing rings are respectively attached to the ends of two adjacent composite tubes. Several second sealing rings are also fitted onto the outer wall of the inner sealing insert on both sides of the raised rib. The second sealing rings are attached to the inner wall of the composite tube.

8. The composite pipe crimp connection structure as described in claim 6, characterized in that, The inner sealing insert includes two separate inserts. An annular positioning plate is provided on one end of the two separate inserts that are close to each other. The two annular positioning plates are attached between the two connectors. A first sealing ring is provided on the side of the two annular positioning plates that are far apart in an arc and is sleeved on the outer wall of the inner sealing insert. The two first sealing rings are respectively attached to the ends of two adjacent composite tubes. A plurality of second sealing rings are sleeved on the outer wall of each of the two separate inserts. The second sealing rings are attached to the inner wall of the composite tube.

9. The composite pipe crimp connection structure as described in any one of claims 1-8, characterized in that, The connector is a clamp, and the outer wall of the connector head away from the elastic flap is provided with a step that cooperates with the clamp.

10. The composite pipe crimp connection structure as described in any one of claims 1-8, characterized in that, The connecting components are flanges that are integrally connected to the connecting heads, and adjacent flanges are connected by a number of bolts.

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