Pipe connection for insulation pipe, which is in contact with high pressure fluid at the end face of the pipe connection

Abstract

The utility model discloses a kind of connecting pieces of insulating tubular product connecting end face contact high-pressure fluid, including ring lock sleeve, inner support core and guide connecting pipe, ring lock sleeve is corresponding with inner support core and extends a section of connecting portion towards guide connecting pipe, the connecting portion can form tensile connection with guide connecting pipe;The maximum outer diameter of inner support core is matched with the inner diameter of tubular product inner tube, the minimum inner diameter of ring lock sleeve is matched with the outer diameter of tubular product;The inner support core of connecting piece is inserted into tubular product port, ring lock sleeve is simultaneously set on this tubular product port, ring lock sleeve is made radial shrinkage deformation by ring pressure device, and then extrude the deformation of the part of tubular product portion set on inner support core to realize the tensile sealing connection of tubular product and connecting piece. By inner support core and guide connecting pipe and tubular product inner wall tight sealing connection, the connecting end face of connected tubular product is completely isolated with high-pressure fluid, the overall quality safety of connected tubular product pipeline is ensured;Ring lock sleeve is then used to press deformation to realize the tensile sealing connection of tubular product and connecting piece, which can meet the technical requirements of high-pressure resistance and tensile resistance of connected pipeline.

Description

Technical Field

[0001] This utility model relates to pipeline connection technology, mainly to connectors used for connecting pipes, specifically connectors that can isolate the pipe connection end face from high-pressure fluid. Background Technology

[0002] Pipelines for transporting fluids are widely used in various fields, such as domestic water supply pipelines and gas pipelines. These pipelines are constructed from pipes and fittings (also known as pipe fittings) connecting the pipes. Commonly used pipe materials include all-metal pipes, plastic pipes, and metal-plastic composite pipes. Among them, metal-plastic composite pipes combine the advantages of both metal and plastic, utilizing the advantages of plastic (cheap, corrosion-resistant, and easy to process) and the advantages of metal (environmentally friendly, hygienic, and high strength), thus gaining increasing popularity in the market. However, compared to pure metal or pure plastic pipes, the connection of composite pipes is more difficult due to the complexity of the materials. The connection end face also has a layered structure due to the composite material. If this end face comes into contact with the high-pressure fluid being transported, the high-pressure fluid can easily penetrate into the layered structure, leading to quality and safety problems in the pipeline after connection. These problems may include a significant reduction in pressure resistance, resulting in pipe bursts and leaks, or a significant reduction in tensile strength, leading to pipe cracking.

[0003] It is precisely because of the motivation to solve the aforementioned objective problems in this industry that this innovative solution was conceived and created. It effectively enables the pipes to meet the technical requirements of high pressure resistance and tensile strength after being connected by innovative connectors, while reducing costs and connection difficulties, and also ensuring the quality and safety of the connected pipes. Utility Model Content

[0004] To address the aforementioned problems, this utility model aims to provide a pipe connector that isolates the pipe connection end face from contact with high-pressure fluid.

[0005] To achieve this technical objective, the present invention provides a pipe connector that isolates the pipe connection end face from contact with high-pressure fluid. The connector includes a metal ring-locking sleeve and a metal inner support guide tube. The inner support guide tube is formed by connecting an inner support core and a guide tube of the same metal material. The ring-locking sleeve corresponds to the inner support core and extends towards the guide tube with a connecting portion, which forms a pull-out resistant connection with the guide tube. The maximum outer diameter of the inner support core matches the inner diameter of the pipe, and the minimum inner diameter of the ring-locking sleeve matches the outer diameter of the pipe. The inner support core of the connector is inserted into the pipe port, and the ring-locking sleeve is simultaneously placed on the pipe port. A ring compression device causes the ring-locking sleeve to radially contract and deform, thereby compressing and deforming the pipe portion fitted on the inner support core to achieve a pull-out resistant sealing connection between the pipe and the connector.

[0006] Preferably, the portion of the guide tube adjacent to the inner support core is threaded, and the connecting portion of the extended ring lock sleeve is also threaded, with the connecting portion and the guide tube connected by threads to form a pull-out resistant connection.

[0007] Preferably, the part of the guide tube adjacent to the inner support core is provided with a connecting groove, and the connecting part of the ring lock sleeve is widened to form a connecting claw. When the connecting claw is placed on the connecting groove, the connecting claw is deformed and pressed into the connecting groove by the ring pressing device to achieve a pull-out resistant connection between the connecting part and the guide tube.

[0008] Furthermore, the inner support core is also provided with a concave tensile ring groove for cooperating with the deformation of the tube to increase tensile resistance; the ring locking sleeve is provided with an inner groove at least at the part corresponding to the concave tensile ring groove.

[0009] Furthermore, the connector also includes an elastic sealing ring, which is fitted around the inner support core to prevent high-pressure fluid from seeping out between the inner wall of the inner tube and the outer wall of the inner support core.

[0010] Furthermore, the inner support core is provided with a concave accommodating groove for fitting an elastic sealing ring.

[0011] Furthermore, the ring locking sleeve has an inner groove at the location corresponding to the ring groove.

[0012] Furthermore, the inner support core is coated with sealant to prevent high-pressure fluid from seeping out between the inner wall of the pipe and the outer wall of the inner support core.

[0013] The beneficial effects of this utility model are: by tightly sealing the inner support core and the guide tube in the connector with the inner wall of the pipe, the connecting end face of the connected pipe is completely isolated from the high-pressure fluid through the inner support guide tube, ensuring the overall quality and safety of the connected pipe pipeline; and by using the ring locking sleeve to apply pressure deformation to achieve the pull-out resistant sealing connection between the pipe and the connector, the technical requirements of high pressure resistance and pull-out resistance of the connected pipeline can be met. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the connector in Embodiment 1 of this utility model;

[0015] Figure 2 This is a cross-sectional view of the inner support guide tube of Embodiment 1 of this utility model;

[0016] Figure 3 This is a cross-sectional view of the ring locking sleeve according to Embodiment 1 of this utility model;

[0017] Figure 4 This is a schematic diagram showing the connection between the ring locking sleeve and the inner support guide tube in Embodiment 1 before and after.

[0018] Figure 5This is a cross-sectional view of the connector in Embodiment 2 of this utility model;

[0019] Figure 6 This is a cross-sectional view of the connector and the pipe after they are connected according to Embodiment 2 of this utility model;

[0020] Figure 7 This is a cross-sectional view of the connector and the pipe after they are connected according to Embodiment 1 of this utility model;

[0021] Figure 8 This is a cross-sectional view of the connector in Embodiment 3 of this utility model;

[0022] Figure 9 This is a cross-sectional view of the connector in Embodiment 4 of this utility model. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the following detailed description, only certain exemplary preferred embodiments of the present invention are described by way of illustration. Undoubtedly, those skilled in the art will recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

[0024] This utility model relates primarily to metal-plastic composite pipes, but it can also connect plastic pipes (including plastic composite pipes). When connecting pipes for pipeline construction, the connectors and the pipe's connecting ends must be sealed, and the tensile strength of the connection must be considered to meet the requirements of transporting high-pressure fluids. Compared to pure metal or pure plastic pipes, connecting composite pipes is more difficult due to the complexity of the materials. The connecting ends have a layered structure from the composite material; if this end comes into contact with the transported high-pressure fluid, the fluid can easily penetrate the layered structure, leading to quality and safety issues in the pipeline after connection. These issues may include significantly reduced pressure resistance leading to pipe bursts or leaks, or significantly reduced tensile strength leading to pipe cracking.

[0025] Based on this, this innovative pipe connector isolates the pipe connection end face from contact with high-pressure fluid, as shown in the attached figure. Figures 1 to 9As shown, it includes a metal ring lock sleeve 11 and a metal inner support guide tube, which is a thin-walled stainless steel tube, a thin-walled copper tube, or a tube made of other metal or alloy materials. The inner support guide tube is formed by connecting an inner support core 21 and a guide tube 22 made of the same metal material; the ring locking sleeve 11 corresponds to the inner support core 21 and extends toward the guide tube 22 with a connecting part 12, the connecting part 12 can form a pull-out resistant connection with the guide tube 22; the maximum outer diameter of the inner support core 21 matches the inner diameter of the inner tube of the pipe 30, and the minimum inner diameter of the ring locking sleeve 11 matches the outer diameter of the pipe 30; during connection, the inner support core 21 of the connector is inserted into the connection port of the pipe 30, and the ring locking sleeve 11 is placed on the corresponding pipe port. The ring locking sleeve 11 is radially contracted and deformed by the ring pressing device, thereby squeezing the pipe part fitted on the inner support core 21 to deform and achieve a pull-out resistant sealing connection between the pipe and the connector; through the tight sealing connection between the inner support core and the guide tube in the connector and the inner wall of the pipe, the connection end face of the connected pipe is completely isolated from the high-pressure fluid through the inner support guide tube, ensuring the overall quality and safety of the connected pipeline.

[0026] To further enhance the tensile strength of the connector and pipe 30 after connection, as shown in the attached... Figure 1-4 In Embodiment 1 of 7, and as shown in the appendix Figure 5 , 6 In the second embodiment, the ring locking sleeve 11 extends toward the connecting tube 22 with a connecting portion 12. The connecting portion 12 is widened to form a connecting claw 121. The connecting tube 22 is provided with a connecting groove 221 near the inner support core 21. When the connecting claw 121 is placed on the connecting groove 221, the connecting claw 121 is deformed and pressed into the connecting groove 221 by the ring pressing device to achieve a pull-out resistant connection between the connecting portion and the connecting tube.

[0027] To further enhance the tensile strength of the connector and pipe 30 after connection, it is also possible to refer to the attached figure. Figure 8 , 9 In the embodiments shown in the third and fourth, the ring lock sleeve 11 extends toward the guide tube and has a connecting part 12 with a thread 122. The guide tube 22 has a thread 222 near the inner support core 21. The connecting part 12 and the guide tube 22 are connected by threads to form a pull-out resistant connection.

[0028] In addition, to enhance the pull-out resistance of the connection between the connector and the tube 30 after ring compression, such as Figure 5 As shown, the inner support core 21 may be provided with a concave tensile ring groove 213 for cooperating with the deformation of the tube 30 to increase tensile resistance; the ring lock sleeve 11 is provided with an inner groove 112 at least at the part corresponding to the concave tensile ring groove 213.

[0029] To achieve a better sealing effect, the connector also includes an elastic sealing ring 211, such as... Figure 5 , 6 As shown, the elastic sealing ring 211 is fitted around the inner support core 21 to prevent high-pressure fluid from seeping out between the inner wall of the inner tube and the outer wall of the inner support core. Further, as... Figure 9 As shown, the inner support core 21 is provided with a concave annular groove 213 for fitting the elastic sealing ring 211. In order to better compress the elastic sealing ring 211, the ring locking sleeve 11 is provided with an inner groove 111 at the part corresponding to the annular groove 213.

[0030] To achieve a better sealing effect, a sealant can also be used, that is, sealant 212 can be applied to the inner support core, such as... Figure 7 As shown, it is used to prevent high-pressure fluid from seeping out between the inner wall of the inner tube and the outer wall of the inner support core.

[0031] The thin-walled metal inner tube involved in this solution can be formed by rolling and welding thin-walled metal strip, or by hot rolling of metal, or by cold drawing / cold rolling of metal.

[0032] The beneficial effects of this utility model are: by tightly sealing the inner support core and the guide tube in the connector with the inner wall of the pipe, the connection end face of the connected pipe is completely isolated from the high-pressure fluid, ensuring the overall quality and safety of the connected pipe pipeline; and by using the ring locking sleeve to apply pressure deformation to achieve the pull-out resistant sealing connection between the pipe and the connector, the technical requirements of high pressure resistance and pull-out resistance of the connected pipeline are met.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pipe connector that isolates the pipe connection end face from contact with high-pressure fluid, characterized in that, The connector includes a metal ring-locking sleeve and a metal inner support guide tube. The inner support guide tube is formed by connecting an inner support core and a guide tube of the same metal material. The ring-locking sleeve corresponds to the inner support core and extends towards the guide tube with a connecting portion, which can form a pull-out resistant connection with the guide tube. The maximum outer diameter of the inner support core matches the inner diameter of the pipe, and the minimum inner diameter of the ring-locking sleeve matches the outer diameter of the pipe. The inner support core of the connector is inserted into the pipe port, and the ring-locking sleeve is simultaneously placed on the pipe port. A ring compression device causes the ring-locking sleeve to radially contract and deform, thereby squeezing and deforming the pipe portion fitted on the inner support core to achieve a pull-out resistant sealing connection between the pipe and the connector.

2. The pipe connector according to claim 1, characterized in that, The portion of the guide tube adjacent to the inner support core is threaded, and the connecting portion of the extended ring lock sleeve is also threaded. The connecting portion and the guide tube are connected by threads to form a pull-out resistant connection.

3. The pipe connector according to claim 1, characterized in that, A connecting groove is formed in the part of the guide tube near the inner support core. The connecting part of the ring lock sleeve extends and is widened to form a connecting claw. When the connecting claw is placed on the connecting groove, the connecting claw is deformed and pressed into the connecting groove by the ring pressing device to achieve a pull-out resistant connection between the connecting part and the guide tube.

4. The pipe connector according to any one of claims 1 to 3, characterized in that, The inner support core is also provided with a concave tensile ring groove for cooperating with the deformation of the tube to increase tensile resistance; the ring lock sleeve is provided with an inner groove at least at the part corresponding to the concave tensile ring groove.

5. The pipe connector according to claim 4, characterized in that, The connector also includes an elastic sealing ring, which is fitted around the inner support core to prevent high-pressure fluid from seeping out between the inner wall of the inner tube and the outer wall of the inner support core.

6. The pipe connector according to claim 5, characterized in that, The inner support core is provided with a concave annular groove for fitting an elastic sealing ring.

7. The pipe connector according to claim 6, characterized in that, The ring locking sleeve has an inner groove at the location corresponding to the ring groove.

8. The pipe connector according to claim 4, characterized in that, The inner support core is coated with sealant to prevent high-pressure fluid from seeping out between the inner wall of the pipe and the outer wall of the inner support core.

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