A highly-sealed joint facilitating pipeline connection and its assembly method

Abstract

The present invention discloses a highly-sealed joint facilitating pipeline connection and its assembly method, including a joint and a pipeline installed on the joint; it is characterized in that the joint adopts a screw groove collar fixed joint, and the screw groove collar fixed joint includes a socket end, a welding end, and a collar installed on the outer side of the socket end for preventing the socket from expanding and enhancing the clamping force; a plurality of expansion grooves for enabling the socket end to expand outwards are provided on the socket end, and a plurality of claws are formed on the socket end through the arrangement of the plurality of expansion grooves. The invention has a simple structure, is easy to connect, has high sealing performance at the connection, high connection firmness and is not easy to fall off, and has high installation and connection efficiency; by providing a plurality of expansion grooves on the socket end and providing semi-circular notches at the ends of the expansion grooves, the deformation stress at the ends of the expansion grooves when the claws expand outwards when the socket end of the pipeline is inserted into the socket end is reduced, and the claws are prevented from being damaged due to large deformation and large stress during connection.

Description

Technical Field

[0001] The present invention relates to a pipe joint, in particular to a high-sealing joint facilitating pipe connection and an assembly method thereof. Background Art

[0002] In the prior art, for polyethylene solid-wall water supply and drainage pipes and polypropylene solid-wall water supply and drainage pipes, during connection, hot melt butt joint, hot melt socket joint or electrofusion socket joint is usually adopted. The principle is to heat and melt the surfaces to be welded with tools, and then fuse the melted surfaces into one body with hydraulic pressure or the tightening force of the socket of the pipe fitting;

[0003] The welding process involves melting temperature, endothermic pressure and clamping pressure, endothermic time and cooling time. Taking a PE100 dn315 PN1.6MPa polyethylene water supply pipe as an example, according to the provisions of GB / T 19809-2005 "Plastics pipes and fittings - Preparation of polyethylene (PE) pipes, fittings or pipe fitting assemblies for hot melt butt joint", its welding time is more than 35 minutes. In addition, the time for tooling installation, pipe section clamping and pipe section alignment usually takes more than 10 minutes, resulting in very low efficiency of pipe welding. Therefore, socket joint is adopted when high connection efficiency is required.

[0004] And electrofusion socket joint uses pipe fittings with internal electric heating wires, and the processing cost is very high. Therefore, electrofusion socket pipe fittings with large diameters are generally not used;

[0005] Now, some water supply pipe-related products also use sealing ring socket joint, and there are relevant industry standards, group standards and patents. For example, QB / T 2892-2007 "Flexible socket polyethylene (PE) pipe fittings for water supply" stipulates the performance of small-diameter polyethylene water supply pipes. In addition, there are standards and patents for drainage pipes with sealing ring socket joint. For example, T / ZZB 2239-2021 "Socket polyethylene solid-wall drainage pipe", these sockets are usually prefabricated on the pipes, and the socket assembly is welded on the straight pipe by hot melt butt joint.

[0006] These standards and patents do not involve the anti-disconnection performance of the pipes. After the pipes are buried in the underground trench, the factors such as pipe length, thermal expansion and contraction, and underground settlement are superimposed, which may cause the pipe joints to come off and result in leakage; water pressure will cause huge and long-term thrust on the pipe ends and bends. When the internal diameter of the dn315 pipe is filled with 1.6MPa tap water, a thrust of up to 9 tons will be generated. When the anti-thrust is insufficient, the pipe will gradually slip off from the socket; polyethylene pipes are flexible pipes. When the soil is relatively loose, the pipes may be deformed and arched underground, and there is a possibility that the connected pipes will slip off in the middle rather than at the end. Therefore, when installing these products with sealing ring socket joint, thrust blocks need to be set to prevent the joints of the products from slipping off.

[0007] In summary, the current hot melt connection and electrofusion connection are cumbersome and time-consuming, and the existing socket connection with sealing rings does not have a suitable anti-disconnection structure, which is prone to slippage and leakage during use. Therefore, it is necessary to develop a new type of connection method, which should have the characteristics of short connection time, simple connection, good sealing performance, and low cost. For this reason, a highly sealed joint for facilitating pipe connection and its assembly method are proposed. Summary of the Invention

[0008] The purpose of the present invention is to propose a highly sealed joint for facilitating pipe connection and its assembly method to solve the above problems.

[0009] To achieve the above object, the present invention provides the following technical solution: A highly sealed joint for facilitating pipe connection, including a joint and a pipe installed on the joint; the characteristic is that the joint adopts a screw groove collar fixed joint, and the screw groove collar fixed joint includes a socket end, a welding end, and a collar installed on the outside of the socket end for preventing the socket from expanding and enhancing the clamping force; several expansion grooves are provided on the socket end to enable the socket end to expand outwards, and several claws are formed on the socket end through the arrangement of the several expansion grooves.

[0010] Further preferably, a spiral positioning groove is provided on the outside of the socket end, and a spiral rib adapted to the spiral positioning groove is provided on the inner wall of the collar; anti-slip patterns for enhancing friction are also provided in the spiral positioning groove.

[0011] Further preferably, the collar adopts a pure plastic collar or a rubber-coated steel collar.

[0012] Further preferably, the screw groove collar fixed joint is replaced with a heat shrinkable collar fixed joint, and the heat shrinkable collar fixed joint includes a sealing end, socket ends on both sides of the sealing end, and a transition section between the socket end and the sealing end; a heat shrinkable collar is also provided on the outside of the socket end, positioning grooves for facilitating pre-positioning of the heat shrinkable collar are provided on the socket end, and positioning ribs adapted to the positioning grooves are provided on the heat shrinkable collar; several expansion grooves are also provided on the socket end to enable the socket end to expand outwards, and several claws are formed on the socket end through the arrangement of the several expansion grooves.

[0013] Further preferably, the socket end is also provided with expansion grooves, and a semi-circular notch for reducing the tearing stress generated when the end of the expansion groove deforms during connection and installation is provided at the end of the expansion groove; the groove width of the expansion groove gradually decreases from the outside to the semi-circular notch.

[0014] Further preferably, it further includes a sealing groove provided on the joint and a sealing ring installed in the sealing groove. The sealing ring is further provided with a sealing lip, and the sealing lip is provided with a conical surface; the height of the sealing lip is 1.2 to 2 times the gap between the pipeline and the joint, and the thickness at the sealing groove is 1 to 2 times the wall thickness of the pipeline.

[0015] Further preferably, it further includes a plurality of meshing teeth provided on the piece claws. The heights of the plurality of meshing teeth gradually decrease in sequence from the outer side to the inner side at the end of the socket. The pipeline is provided with meshing grooves adapted to the plurality of meshing teeth, and the meshing teeth are further provided with guiding inclined surfaces.

[0016] Further preferably, the piece claws are warped outwards to form an installation angle with the pipeline, which is convenient for the pipeline to be inserted.

[0017] An assembly method of a highly sealed joint convenient for pipeline connection, characterized in that: the assembly method of the screw groove collar fixed joint is as follows:

[0018] a. Grooving at the socket end: First, a plurality of expansion grooves are opened on the socket end or a plurality of expansion grooves are formed during injection molding, so that the socket end forms a plurality of piece claws through the arrangement of the plurality of expansion grooves;

[0019] b. Sealing ring installation: Install the sealing ring in the sealing groove on the joint;

[0020] c. Preliminary connection of the joint and the pipeline: Insert the socket end of the pipeline into the socket end until the meshing grooves on the socket end fit with the meshing teeth on the socket end;

[0021] d. Collar preparation: A plastic collar is injection molded with engineering plastics, or a coated collar with an external plastic and a steel sheet core is made by a coating process, and spiral ridges are provided on the surface;

[0022] e. Collar installation: After the socket end and the socket end are meshingly connected, rotate and push the collar along the spiral groove on the outer surface of the socket end, so as to fix the collar and the socket end into one body.

[0023] The assembly method of the heat shrinkable collar fixed joint is as follows:

[0024] a. Grooving at the socket end: First, a plurality of expansion grooves are opened on the socket end or a plurality of expansion grooves are formed during injection molding, so that the socket end forms a plurality of piece claws through the arrangement of the plurality of expansion grooves;

[0025] b. Sealing ring installation: Install the sealing ring in the sealing groove on the joint;

[0026] c. Preliminary connection of the joint and the pipeline: Insert one end of the pipeline into the socket end of the joint until the meshing grooves on the pipeline fit with the meshing teeth on the socket end;

[0027] d. Collar preparation: The heat-shrinkable collar made of plastic molding is injection-molded. After cooling, the inner diameter is 90%-98% of the outer diameter of the joint. Then, it is heated to 105-115°C with a heating rod to expand the inner diameter of the collar, and then cooled with strong cold air to freeze the stress. After processing, the inner diameter of the collar is 105%-115% of the outer diameter of the joint.

[0028] e. Collar installation: Then, the completed collar is installed on the socket end and positioned through the cooperation of the positioning rib and the positioning groove. After positioning, the collar can be heated by an open flame, hot air, etc., so that its diameter becomes smaller and then installed on the socket end to complete the installation connection.

[0029] Advantages of the present invention:

[0030] The structure of the present invention is simple, the connection is convenient, the sealing performance at the connection is high, the connection firmness is high and it is not easy to fall off, and the installation and connection efficiency is high;

[0031] The pressure-bearing component is transferred from the traditional socket end to the collar, and the collar is fixed by a simple-structured screw groove or heat shrinkage, ensuring reliability; the material of the collar can be selected from high-rigidity metal materials or composite materials, and the size of the collar can be adjusted according to the internal fluid pressure without considering the weldability and hygiene with the polyethylene socket end, increasing the design flexibility, effectively reducing costs, and shortening the design time;

[0032] By opening a number of expansion grooves on the socket end and opening semi-circular notches at the ends of the expansion grooves, the deformation stress at the ends of the expansion grooves when the blade claws expand outward when the pipe socket end is inserted into the socket end is reduced, avoiding damage to the blade claws due to large deformation and large stress during connection;

[0033] By providing a number of meshing teeth on the socket end, and the height of the meshing teeth gradually decreases from the outside to the inside, making it conform to the angle when the blade claws open, it can ensure the firm connection between the socket end and the pipe while reducing the angle of outward expansion of the blade claws when the pipe is inserted into the socket end, avoiding permanent yield deformation or damage due to large expansion of the blade claws during insertion;

[0034] Through the setting of the collar, the meshing teeth are prevented from deforming radially outward under force, ensuring that the pipe connection part still has sufficient anti-disconnection effect after being stressed;

[0035] By setting a sealing groove at the junction of the sealing end and the transition section on the joint or near the middle of the socket end, installing a sealing ring in the sealing groove, and providing a sealing lip on the sealing ring, when the sealing ring is squeezed by water, the sealing lip is squeezed into the narrow triangular area between the transition section and the pipe body. As the triangular area space between the transition section and the pipe gradually decreases, when the sealing ring is squeezed towards the transition section under pressure, the stronger the squeezing force, the tighter the sealing ring is squeezed into the narrow space of the transition section, thus better enhancing the sealing performance between the joint and the pipe, with better leak prevention performance and the sealing ring will not be dislodged from the sealing groove or leak due to the squeezing of water;

[0036] At the same time, by providing a conical surface on the sealing lip, when water forms a forward extrusion on the sealing lip, a downward extrusion force is formed through the conical surface, making the sealing lip closer to the pipe and having better sealing performance;

[0037] During installation, the spiral ridges on the inner circular surface of the high-strength plastic collar or the rubber-coated steel collar are coupled with the spiral positioning grooves on the outer surface of the joint through simple rotation of the threads, which can quickly and conveniently fix the clip on the pipe and make it have excellent water pressure resistance. Brief Description of the Drawings

[0038] Attached Figure 1 is a schematic structural diagram of Embodiment 1 of the present invention;

[0039] Attached Figure 2 is a schematic cross-sectional structural diagram of Embodiment 1 of the present invention;

[0040] Attached Figure 3 is a schematic structural diagram of the sealing ring of the present invention;

[0041] Attached Figure 4 is a schematic structural diagram of Embodiment 2 of the present invention;

[0042] Attached Figure 5 is a schematic cross-sectional structural diagram of Embodiment 2 of the present invention;

[0043] Attached Figure 6 is a partially enlarged schematic structural diagram of the sealing ring of the present invention;

[0044] Attached Figure 7 is a partially enlarged schematic structural diagram of Embodiment 2 of the present invention;

[0045] Attached Figure 8 is a partially schematic structural diagram of Embodiment 2 of the present invention;

[0046] Attached Figure 9 is a partially schematic cross-sectional structural diagram of the joint of the present invention.

[0047] Legend: 1. Connector; 2. Pipe; 21. Engagement groove; 3. Socket end; 31. Groove; 32. Piece of claw; 33. Engagement tooth; 35. Semi-circular notch; 36. Positioning groove; 37. Guide slope; 4. Sealing end; 5. Transition section; 6. Collar; 61. Positioning rib; 62. Spiral positioning groove; 63. Spiral rib; 7. Sealing groove; 71. Sealing ring; 72. Sealing lip; 73. Conical surface; 8. Welding end; 9. Heat shrinkable collar. Detailed implementation

[0048] Next, we will further illustrate a highly-sealed connector for facilitating pipe connection and its assembly method according to the present invention in conjunction with the accompanying drawings.

[0049] Refer to Figures 1-9 As shown in , a highly-sealed connector for facilitating pipe connection includes a connector 1 and a pipe 2 installed on the connector 1; the feature is that the connector 1 adopts a screw groove collar fixed connector, and the screw groove collar fixed connector includes a socket end 3, a welding end 8, and a collar 6 installed outside the socket end 3 for preventing the socket from expanding and enhancing the clamping force; a plurality of expansion grooves 31 for enabling the socket end 3 to expand outward are provided on the socket end 3, and a plurality of pieces of claws 32 are formed on the socket end 3 through the arrangement of the plurality of expansion grooves 31.

[0050] Through the arrangement of the collar 6, it is used to reinforce the connection firmness between the socket end 3 and the pipe, prevent the engagement teeth 33 from undergoing radial expansion deformation after being stressed, and thus can achieve a better anti-disconnection effect.

[0051] In one embodiment, a spiral positioning groove 62 is provided on the outer side of the socket end 3, and a spiral rib 63 adapted to the spiral positioning groove 62 is provided on the inner wall of the collar 6; anti-slip patterns for enhancing friction are further provided in the spiral positioning groove 62; through the arrangement of the spiral positioning groove 62 and the spiral rib 63, the collar and the socket end are connected by screwing; the friction of the spiral sliding of the collar is increased, and the collar is prevented from slipping off due to vibration.

[0052] In one embodiment, the collar 6 adopts a pure plastic collar or a plastic-coated steel collar.

[0053] In one embodiment, the screw groove collar fixed joint is replaced with a heat shrinkable collar fixed joint. The heat shrinkable collar fixed joint includes a sealing end 4, socket ends 3 on both sides of the sealing end 4, and a transition section 5 between the socket end 3 and the sealing end 4. A heat shrinkable collar 9 is further provided on the outer side of the socket end 3. A positioning groove 36 for pre-positioning the heat shrinkable collar 9 is provided on the socket end 3, and a positioning rib 61 adapted to the positioning groove 36 is provided on the heat shrinkable collar 9. A plurality of expansion grooves 31 are also provided on the socket end 3 to enable the socket end 3 to expand outwards. By providing a plurality of expansion grooves 31, a plurality of claws 32 are formed on the socket end 3.

[0054] In one embodiment, the socket end 3 is also provided with expansion grooves 31, and a semicircular notch 35 for reducing the tearing stress generated at the end of the expansion groove 31 during connection and installation deformation is provided at the end of the expansion groove 31. The groove width of the expansion groove 31 gradually decreases from the outside to the semicircular notch 35. By providing a plurality of expansion grooves 31 on the socket end 3 and providing semicircular notches 35 at the ends of the expansion grooves 31, the deformation stress at the end of the expansion groove 31 when the claws 32 expand outwards during the insertion of the pipeline into the socket end 3 is reduced, and the damage of the end of the expansion groove 31 due to large deformation stress during the outward expansion of the claws 32 is avoided.

[0055] In one embodiment, it further includes a sealing groove 7 provided on the joint 1 and a sealing ring 71 installed in the sealing groove 7. A sealing lip 72 is further provided on the sealing ring 71, and a conical surface 73 is provided on the sealing lip 72. The height of the sealing lip 72 is 1.2 to 2 times the gap between the pipeline 2 and the joint 1, and the thickness at the sealing groove 7 is 1 to 2 times the wall thickness of the pipeline 2. The overall thickening or the thickening form with an arch at the sealing groove can be adopted.

[0056] By providing a sealing groove 7 at the junction of the sealing end 4 and the transition section 5 or near the middle of the socket end 3 close to the inclined platform position, installing a sealing ring 71 in the sealing groove 7, and providing a sealing lip 72 on the sealing ring 71, when the sealing ring 71 is squeezed by water, the sealing lip 72 is squeezed into the narrow space between the transition section 5 and the pipe body, and the space between the transition section 5 and the pipeline gradually decreases. Thus, when the sealing ring 71 is pressed towards the transition section 5 or the inclined platform, the stronger the pressing force, the tighter the sealing ring 71 is squeezed into the narrow space of the transition section 5, thereby better enhancing the sealing performance between the joint 1 and the pipeline, having better leak-proof performance and the sealing ring 71 will not be disengaged from the sealing groove 7 due to being squeezed by water.

[0057] At the same time, by providing a conical surface 73 on the sealing lip 72, when water forms a forward extrusion on the sealing lip 72, a downward pressing force is formed through the conical surface 73, so that the sealing lip 72 is closer to the pipeline and has better sealing performance.

[0058] In one embodiment, it also includes a plurality of meshing teeth 33 arranged on the claws 32, and the heights of the plurality of meshing teeth 33 gradually decrease from the outside to the inside from the socket end 3. The pipe 2 is provided with a meshing groove 21 adapted to the plurality of meshing teeth 33, and the meshing teeth 33 are also provided with a guiding inclined surface 37; the meshing groove 21 on the pipe can be made by straight pipe processing, and can also be made by secondary hot-melt welding of a pipe fitting with a meshing groove to the end of the pipe.

[0059] By arranging a plurality of meshing teeth 33 on the socket end 3, and the meshing teeth 33 gradually decrease from the outside to the inside, the pipe and the joint 1 may fall off due to the axial impact and extrusion force of water on the pipe when the pipe body and the joint 1 fall off, so the axial position of the joint 1 and the pipe is limited and prevented from falling off by the cooperation of the meshing teeth 33 and the meshing groove, so the length of the meshing teeth 33 is not required to be high, so that the length of the meshing teeth 33 can ensure the firmness of the connection between the socket end 3 and the pipe, and at the same time reduce the outward expansion angle of the claw 32 when the pipe is inserted into the socket end 3, so as to avoid the claw 32 from being damaged due to the large expansion during insertion;

[0060] By setting the guiding inclined surface 37 , when the pipe is inserted into the joint 1 , the guiding inclined surface 37 guides the extrusion claw 32 to expand outward.

[0061] In one embodiment, the claw 32 is tilted outward to form an installation angle with the pipe 2; when the material of the joint 1 is PE100, the installation angle is 3-6°; when the material of the joint 1 is PPB, its maximum installation angle is 3-10°. By setting the installation angle, the claw 32 is tilted outward, and the tilting of the claw 32 drives the meshing teeth 33 to tilt outward, which facilitates the insertion of the pipe into the socket end 3 and avoids interference from the meshing teeth 33 during insertion.

[0062] The assembly method of the present invention is as follows: Example 1

[0063] The joint is a screw groove collar fixed joint.

[0064] The assembly method consists of two main steps:

[0065] 1. Insertion of socket end

[0066] Prefabrication in the factory: First, a plurality of expansion grooves 31 are opened on the socket end 3, so that the socket end 3 forms a plurality of claws 32 through the arrangement of the plurality of expansion grooves 31; then, the sealing ring 71 is installed in the sealing groove 7 on the joint 1, and the sealing lip 72 on the sealing ring 71 faces the sealing end 4 during installation; the welding end 8 of the joint 1 is connected to one end of the pipe by hot-melt welding,

[0067] Connection at the construction site: Then, insert the socket end 3 of the joint 1 onto the pipe. When inserting, after the pipe contacts the conical surface 73 on the engaging teeth 33, during the continuous pushing process, an outward extrusion force is formed on the piece claws 32, driving several piece claws 32 to expand outward until the engaging teeth 33 on the joint 1 fit with the engaging grooves 21 on the pipe, and then stop pushing.

[0068] II. Installation of the collar

[0069] Refer to Figure 1 As shown in, after inserting one end of the pipe 2 into the socket end 3, then install the collar 6 on the socket end 3 by screwing it tightly through the cooperation of the spiral rib 62 and the spiral positioning groove 63 for locking. Embodiment 2

[0070] The joint described adopts a heat-shrinkable collar fixed joint.

[0071] The specific assembly method is as follows:

[0072] Grooving the socket end: First, open several expansion grooves 31 on the socket end 3 or form several expansion grooves 31 during injection molding, so that the socket end 3 forms several piece claws 32 through the setting of several expansion grooves 31.

[0073] Installation of the sealing ring: Install the sealing ring 71 in the sealing groove 7 on the joint 1.

[0074] Preliminary connection of the joint and the pipe: Insert one end of the pipe 2 into the socket end 3 of the joint until the engaging groove 21 on the pipe 2 fits with the engaging teeth 33 on the socket end 3.

[0075] The heat-shrinkable collar 63 made of plastic is injection molded. After cooling, the inner diameter is 90%-98% of the outer diameter of the joint 1. Then, use a heating rod to heat it to 105-115°C to expand the inner diameter of the collar 6, and then cool it with strong cold air to freeze the stress. After processing, the inner diameter of the collar 6 is 105%-115% of the outer diameter of the joint 1.

[0076] Then, install the completed heat-shrinkable collar 63 on the socket end 3 and position it through the cooperation of the positioning rib 61 and the positioning groove 36. After positioning, the heat-shrinkable collar 63 can be heated by an open flame, hot air heating, etc., so that its diameter becomes smaller and it is installed on the socket end 3 to complete the installation connection.

[0077] The protection scope of the present invention is not limited to the above embodiments and their variations. Routine modifications and substitutions made by those skilled in the art based on the content of this embodiment all fall within the protection scope of the present invention.

Claims

1. A highly-sealed joint facilitating pipeline connection, comprising a joint and a pipeline installed on the joint; characterized in that The described joint adopts a screw groove collar fixed joint, and the screw groove collar fixed joint includes a socket end, a welding end, and a collar installed on the outer side of the socket end for preventing the socket from expanding and enhancing the clamping force; a plurality of expansion grooves are provided on the socket end to enable the socket end to expand outward, and through the arrangement of the plurality of expansion grooves, the socket end forms a plurality of claws; The socket end is also provided with expansion grooves, and a semi-circular notch is provided at the end of the expansion groove for reducing the tearing stress generated at the end of the expansion groove during connection and installation deformation; the groove width of the expansion groove gradually decreases from the outside to the semi-circular notch; Replace the screw groove collar fixed joint with a heat shrinkable collar fixed joint. The heat shrinkable collar fixed joint includes a sealing end, socket ends on both sides of the sealing end, and a transition section between the socket end and the sealing end; a heat shrinkable collar is also provided on the outer side of the socket end, a positioning groove for facilitating the pre-positioning of the heat shrinkable collar is provided on the socket end, and a positioning rib adapted to the positioning groove is provided on the heat shrinkable collar; a plurality of expansion grooves are also provided on the socket end to enable the socket end to expand outward, and through the arrangement of the plurality of expansion grooves, the socket end forms a plurality of claws; It also includes a sealing groove provided on the joint and a sealing ring installed in the sealing groove. A sealing lip is also provided on the sealing ring, and a conical surface is provided on the sealing lip; the height of the sealing lip is 1.2 to 2 times the gap between the pipe and the joint, and the thickness at the sealing groove is 1 to 2 times the wall thickness of the pipe; there is a narrow space between the transition section and the pipe body. After the sealing ring is squeezed by water, the sealing lip is squeezed into the narrow space between the transition section and the pipe body, and the space between the transition section and the pipe gradually decreases; It also includes a plurality of engaging teeth provided on the claws. The heights of the plurality of engaging teeth gradually decrease from the outer side to the inner side at the port of the socket end. An engaging groove adapted to the plurality of engaging teeth is provided on the pipe, and a guiding inclined surface is also provided on the engaging teeth; the collar adopts a pure plastic collar or a rubber-coated steel collar; The assembly method using the heat shrinkable collar fixed joint is as follows: a. Socket end grooving: First, a plurality of expansion grooves are opened on the socket end or formed during injection molding, so that the socket end forms a plurality of claws through the arrangement of the plurality of expansion grooves. At the same time, a semi-circular notch for reducing the tearing stress generated at the end of the expansion groove during connection and installation deformation is provided at the end of the expansion groove, and the groove width of the expansion groove gradually decreases from the outside to the semi-circular notch; b. Sealing ring installation: Install the sealing ring in the sealing groove on the joint; c. Preliminary connection of the joint and the pipe: Insert one end of the pipe into the socket end of the joint until the engaging groove on the pipe coincides with the engaging teeth on the socket end; d. Collar preparation: The heat shrinkable collar formed by plastic molding is injection molded. After cooling, the inner diameter is 90%-98% of the outer diameter of the joint. Then, it is heated with a heating rod to 105-115°C to expand the inner diameter of the collar and then cooled with strong cold air to freeze the stress. After processing, the inner diameter of the collar is 105%-115% of the outer diameter of the joint; e. Ferrule installation: Then install the completed ferrule on the socket end and position it through the cooperation of the positioning rib and the positioning groove. After positioning, the ferrule can be heated by an open flame, hot air, etc., so that its diameter becomes smaller and then installed on the socket end to complete the installation connection.

2. The highly-sealed joint facilitating pipeline connection according to claim 1, wherein: The outer side of the socket end is provided with a spiral positioning groove, and the inner wall of the ferrule is provided with a spiral rib adapted to the spiral positioning groove; anti-slip patterns for enhancing friction are also provided in the spiral positioning groove.

3. A highly-sealed joint facilitating pipe connection according to claim 1, characterized in that: The piece claws are warped outwards to form an installation angle convenient for the pipe to be inserted with the pipe.

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