Anti-burst structure of pipe conveying sleeve

Abstract

The utility model discloses a kind of anti-burst structure of pipe conveying collar, including collar direct head and the pipeline butt-jointed with it, the end of collar direct head and pipeline butt joint is collar screw rod, taper guide hole is opened on collar screw rod, taper guide hole is provided with the taper face collar of setting on pipeline, collar locking piece is also installed on pipeline, gap between collar locking piece and pipeline is also provided with self-locking variable-diameter collar of setting on the pipeline, the inner wall of self-locking variable-diameter collar has thread structure.The utility model utilizes collar locking piece to push and twist taper face collar and self-locking variable-diameter collar, so that taper face collar and self-locking variable-diameter collar mutually abut, the other end of taper face collar forms embedded metal wire seal with pipeline surface, and the diameter of self-locking variable-diameter collar is smaller under the action of inner diameter extrusion, and the thread of its inner wall is embedded in pipeline surface, forms embedded gear connection, to prevent burst accident from happening.

Description

Technical Field

[0001] This utility model belongs to the field of high-pressure fluid pipeline transportation safety technology, and in particular relates to an anti-explosion structure for pipeline ferrules. Background Technology

[0002] Currently, the installation and connection methods for conventional high-pressure fluid or ultra-high-pressure fluid pipelines are as follows: (1) Flange structure connection: It is necessary to weld the pipe end to the flange, and then weld the other end of the pipe to the flange in the same way. Then, the two pre-treated pipe flanges are connected together, and a gasket or sealing ring is installed in the middle. Then, bolts are passed through the flange holes and the bolts and nuts are tightened to check the strength and air tightness. Only after the test is correct can it be put into use. However, each pipe has to be prefabricated in the same way, which requires a lot of manpower and engineering work, poor welding quality control, many process steps, a lot of repetitive work, a lot of materials, high cost, low efficiency, and the sealing method is mostly suitable for low and narrow pressure range. It is usually used only under special needs. (2) Traditional welding connection: The welding method of using high temperature to fuse metals and then interpenetrate to reconstruct the metal microstructure to realize pipeline connection. It is applicable to metal welding, relatively simple to operate and efficient. However, the welding quality is affected by temperature deformation, differences in metal materials and interference from the qualifications and experience of operators. Welding of flammable, explosive, high pressure and ultra-high pressure hazardous chemical fluids requires special operation qualifications. Each weld joint must be radiographically inspected, which pollutes the environment. Moreover, the inspection is limited by the operating space, and cannot be fully inspected or has a limit of omission. Due to its special nature, the inspection can only be carried out by sampling, and the hidden defects of quality control are inevitable. The cost of quality control consistency is high. Therefore, it is difficult to guarantee the quality control at one time. In addition, the welding method destroys the structural strength of the original steel metal microstructure and is limited by the penetration and destruction of extremely small molecules under high pressure / ultra-high pressure. For example, small molecules in hydrogen medium accelerate hydrogen embrittlement. Therefore, the application of welding is limited and is not suitable for the entire quality control pipeline connection. The process is cumbersome, inefficient and costly, and there are many factors that interfere with quality control. (3) Flared connection: Its features are strong safety, no need for hot welding or flaw detection, high tensile strength, and less prone to structural collapse and explosion of pipelines. However, the construction is complicated and requires a special high-pressure flaring machine to prefabricate the flaring at both ends of each connecting pipeline. At the same time, there are special thermal ductility and plasticity requirements for the two ends of the pipes that need to be flared. Otherwise, the prefabrication of the flaring is prone to visible and invisible cracks, reducing the pressure resistance and air tightness. In particular, it is not suitable for pipeline connection of ultra-high pressure micro-molecular fluids. It is very easy to cause long-term stable and reliable performance, with uncertain leakage and flaring breakage hazards. Flaring prefabrication connection is complicated, has many procedures and low efficiency, special material processing, and the flaring is limited to ultra-high pressure micro-molecular fluid molecules. Otherwise, it will become an uncertain hazard and costly. (4) C / T connector connection: It has the advantages of on-site installation and connection without fire, no welding required, simple operation, testing and inspection, fast and efficient, and easy quality control. It is the recommended choice for high pressure / overpressure pipeline installation and connection. However, it is expensive. Prefabricated parts ensure airtightness and high angle accuracy. Imported C / T connectors are expensive, resulting in low overall cost performance. (5) Standard compression fitting connection: As a standard connection technology widely used in national standards, it has the advantages of not requiring special tools for prefabrication, no need for hot work, welding, or flaw detection, simple and convenient installation, high efficiency, consistent quality control, and strong guarantee. It is suitable for large-scale indoor and outdoor projects, efficient and fast installation and connection, installation with few environmental restrictions, high cost performance, and easy to promote and popularize. In summary, standard compression fittings are currently the preferred choice for installation and connection in pipeline transportation of high-pressure or ultra-high-pressure fluids, especially for pipeline projects where the pressure rating is not specifically required. However, their limitations lie in the limited range of material properties suitable for different pressure ratings. The sealing and pressure resistance strength of the compression fitting at the connection point is susceptible to the cumulative effects of long-term use, such as the pulsation of the pipeline fluid and the inherent frequency vibration of the pipe fittings, as well as the cumulative effects of thermal expansion and contraction caused by environmental temperature changes. These combined effects are transmitted to the critical constraint point of the compression fitting, causing the embedded compression fitting to become blunt, experience elastic fatigue, and shift. This reduces the airtightness and pressure resistance at the compression fitting edge, making it prone to instantaneous loss of airtightness and pressure resistance, leading to fluid leakage. In severe cases, this can be accompanied by impact or even sparks and explosions, posing a safety hazard of leakage and explosion. Utility Model Content

[0003] The purpose of this invention is to overcome the defects of existing technology and provide an anti-explosion structure for pipeline ferrules. It utilizes a ferrule locking component to push and tighten a conical ferrule and a self-locking reducing ferrule, causing them to abut against each other. Simultaneously, the other end of the conical ferrule forms an embedded metal wire seal with the pipe surface. Under the action of internal radial compression, the diameter of the self-locking reducing ferrule decreases, and its inner wall threads embed into the pipe surface, forming an embedded meshing connection. The conical ferrule and the self-locking reducing ferrule cooperate; the greater the explosive potential energy, the stronger the threaded meshing effect of the self-locking reducing ferrule with the pipe surface, while simultaneously preventing the pipe, which is meshed with the self-locking reducing ferrule, from being pulled out. This achieves the purpose of real-time counteracting of the accumulated explosive potential energy, ensuring convenient, efficient, and cost-effective installation without welding, open flame, or flaw detection, and preventing explosion accidents during high-pressure / ultra-high-pressure pipeline ferrule installation connections.

[0004] The objective of this utility model is achieved through the following technical solution: An anti-explosion structure for a pipeline ferrule includes a ferrule direct head and a pipe that connects to it. One end of the ferrule direct head that connects to the pipe is a ferrule screw. A tapered guide hole is provided on the tapered guide hole. A tapered ferrule fitted on the pipe is disposed in the tapered guide hole. A ferrule locking member is also installed on the pipe. A self-locking reducing ferrule fitted on the pipe is disposed in the gap between the ferrule locking member and the pipe. The inner wall of the self-locking reducing ferrule has a threaded structure. Wherein, one end of the ferrule locking member is threadedly connected to the ferrule screw, and the other end is in contact with the self-locking variable diameter ferrule. The ferrule locking member is used to push and tighten the conical ferrule and the self-locking variable diameter ferrule so that the conical ferrule and the self-locking variable diameter ferrule abut against each other, and so that the self-locking variable diameter ferrule is embedded and engaged with the pipe surface, and so that the conical ferrule and the pipe surface form an embedded metal wire seal. In this embodiment, the conical ferrule and the self-locking reducing ferrule are pushed and tightened by the ferrule locking member, causing the conical ferrule and the self-locking reducing ferrule to abut against each other. At the same time, the other end of the conical ferrule forms an embedded metal wire seal with the pipe surface. Under the action of inner radial compression, the diameter of the self-locking reducing ferrule decreases, and its inner wall thread embeds into the pipe surface, forming an embedded toothed connection. The conical ferrule and the self-locking reducing ferrule cooperate with each other. The greater the bursting tendency energy, the stronger the threaded toothed engagement effect of the self-locking reducing ferrule with the pipe surface, while preventing the pipe that is toothed with the self-locking reducing ferrule from being pulled out, so as to achieve the purpose of real-time counteracting of the accumulation of bursting tendency energy.

[0005] In one embodiment, one end of the conical ferrule is a force-bearing part, which contacts the self-locking variable diameter ferrule. The wall of the conical guide hole forms an inner radial compression on the conical ferrule, thereby forming an embedded metal wire seal between the conical ferrule and the pipe surface. In this embodiment, the force-bearing part of the conical ferrule is squeezed by the ferrule locking member, and the conical ferrule moves along the conical guide hole of the ferrule screw and gradually forms an embedded metal wire seal with the pipe surface.

[0006] In one embodiment, the force-bearing part is connected to a ferrule cutting edge that contacts the surface of the pipe via a tapered section. The tapered guide hole acts on the tapered section and causes the ferrule cutting edge to embed into the surface of the pipe to form an embedded metal wire seal. In this embodiment, one end of the conical ferrule is the ferrule cutting edge. The ferrule cutting edge is connected to the force-bearing part through the conical section to form a complete conical ferrule. Under the action of the ferrule locking member, the conical section is guided by the conical guide hole, so that the ferrule cutting edge at one end of the conical ferrule is embedded in the pipe surface, forming an embedded metal wire seal with the pipe. This means that no hot work, welding, or flaw detection is required. The installation is convenient and efficient, and the quality control is consistent and reliable. It is suitable for indoor and outdoor projects with large workloads, less environmental restrictions, and meets the needs of cost-effective installation.

[0007] In one embodiment, the self-locking reducing sleeve includes a cylindrical portion and a frustum portion connected to the cylindrical portion. Both the cylindrical portion and the frustum portion are fitted onto the pipe. The cylindrical portion abuts against the conical sleeve. Multiple continuous elastic grooves are formed on the wall surfaces of the cylindrical portion and the frustum portion. The elastic grooves do not completely penetrate the self-locking reducing sleeve. In this embodiment, the self-locking reducing ferrule has multiple partially penetrating elastic grooves, dividing it into several continuous sections. Under the inner radial compression of the ferrule locking element, its diameter gradually decreases. As its diameter gradually decreases, the threads on its inner wall gradually embed into the pipe surface, and the embedding depth increases with the increase of the compression force, thus forming an embedded meshing connection. The greater the bursting tendency energy, the stronger the self-locking reducing ferrule's forced threaded meshing effect with the pipe surface, while simultaneously preventing the pipe that is meshed with the self-locking reducing ferrule from being pulled out, thereby achieving the purpose of real-time counteracting of the accumulation of bursting tendency energy.

[0008] In one embodiment, a plurality of the elastic grooves are evenly spaced along the circumference of the self-locking variable diameter ferrule.

[0009] In one embodiment, the elastic groove includes a first elastic groove that penetrates the cylindrical portion and extends to the frustum portion, and a second elastic groove that penetrates the frustum portion and extends to the cylindrical portion, wherein the first elastic groove and the second elastic groove are arranged alternately.

[0010] In one embodiment, the stiffness of the self-locking reducing ferrule is greater than that of the tapered ferrule, and the stiffness of the tapered ferrule is greater than that of the pipe. This embodiment ensures that the threaded structure on the inner wall of the self-locking reducing ferrule can be embedded into the pipe surface to form an embedded meshing connection, and that the cutting edge of the tapered ferrule can be embedded into the pipe surface to form an embedded metal wire seal. At the same time, the root of the self-locking reducing ferrule and the force-bearing part of the tapered ferrule abut against each other, ensuring the pushing and tightening effect of the tapered ferrule.

[0011] In one embodiment, the ferrule locking member includes a locking section threadedly connected to the ferrule screw, the locking section being connected to an inner tapered section that contacts the self-locking variable diameter ferrule; In this embodiment, the locking section of the ferrule locking member is threadedly connected to the ferrule screw, allowing it to move towards the ferrule's direct head. During this movement, its inner conical section pushes and tightens the self-locking variable diameter ferrule, while simultaneously limiting the engagement of the self-locking variable diameter ferrule and the pipe, thus preventing the pipe from being pulled out and thus achieving the purpose of real-time counteracting the accumulation of explosive potential energy.

[0012] In one embodiment, a plurality of locking structures are sequentially fitted onto the pipe. The plurality of locking structures are located between the ferrule direct head and the ferrule locking member. Each locking structure is provided with a conical ferrule fitted onto the pipe and forming an embedded metal wire seal with the pipe surface.

[0013] In one embodiment, one end of the locking structure has a locking screw and the other end has a nut that matches the locking screw. The conical sleeve is disposed inside the locking screw to allow two adjacent locking structures to be connected.

[0014] The beneficial effects of this utility model are as follows: This invention provides an anti-explosion structure for pipeline ferrules. It improves upon standard ferrule connections by using a ferrule locking mechanism to push and tighten a conical ferrule and a self-locking reducing ferrule, causing them to abut against each other. Simultaneously, the other end of the conical ferrule forms an embedded metal wire seal with the pipe surface. Furthermore, under the action of internal radial compression, the diameter of the self-locking reducing ferrule decreases, and its inner wall threads embed into the pipe surface, forming an embedded meshing connection. With the conical ferrule and the self-locking reducing ferrule working together, the greater the potential for explosion, the more the self-locking reducing ferrule, under the pre-tightening locking torque of the ferrule locking mechanism, will engage. The stronger the threaded engagement effect of the ferrule with the pipe surface, the better. After the self-locking variable diameter ferrule engages with the pipe, its diameter is much larger than the diameter of the inner cone section at the end of the ferrule locking part. This prevents the pipe from being pulled out when it is engaged with the self-locking variable diameter ferrule, thus achieving the purpose of real-time counteracting the accumulation of bursting potential energy. This ensures convenient, efficient, and cost-effective installation without welding, open flame, or flaw detection. It also prevents bursting accidents that may occur when using ferrule installation connections in high-pressure / ultra-high-pressure pipelines, ensuring its long-term reliable, safe, and stable application. It is suitable for widespread use in the installation and connection of high-pressure or ultra-high-pressure fluid pipelines. Attached Figure Description

[0015] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings. Wherein: Figure 1 A schematic diagram of the structure of this utility model is shown; Figure 2 Showing Figure 1A magnified schematic diagram of the local structure at point A; Figure 3 This shows a schematic diagram (top view) of the structure of the self-locking variable diameter ferrule of this utility model; Figure 4 A schematic diagram (front view) of the self-locking variable diameter ferrule of this utility model is shown. In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale.

[0016] Figure label: 1-Suction sleeve direct head, 2-Locking structure, 3-First suction sleeve cutting edge, 4-First conical suction sleeve, 5-Suction sleeve screw, 6-Suction sleeve locking element, 7-Second suction sleeve cutting edge, 8-Second conical suction sleeve, 9-Self-locking reducing suction sleeve, 10-Pipe, 901-Threaded structure, 902-First elastic groove, 903-Second elastic groove, 904-Cylindrical part, 905-Frustum part. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] This utility model provides an anti-explosion structure for a pipeline ferrule, including a ferrule direct head 1 and a pipe 10 connected thereto. The end of the ferrule direct head 1 that connects with the pipe 10 is a ferrule screw 5. A tapered guide hole is provided on the ferrule screw 5. A tapered ferrule fitted on the pipe 10 is provided in the tapered guide hole. A ferrule locking member 6 is also installed on the pipe 10. A self-locking variable diameter ferrule 9 fitted on the pipe 10 is provided in the gap between the ferrule locking member 6 and the pipe 10. The inner wall of the self-locking variable diameter ferrule 9 has a threaded structure 901. One end of the ferrule locking member 6 is threadedly connected to the ferrule screw 5, and the other end is in contact with the self-locking reducing ferrule 9. The ferrule locking member 6 is used to push and tighten the conical ferrule and the self-locking reducing ferrule 9 so that the conical ferrule and the self-locking reducing ferrule 9 abut against each other, and so that the self-locking reducing ferrule 9 is embedded and engaged with the surface of the pipe 10, and so that the conical ferrule and the surface of the pipe 10 form an embedded metal wire seal. It should be noted that, as a standard connection method widely used in national standards, standard ferrule connections have advantages such as no need for special tools for prefabrication, no need for hot work, welding, flaw detection, simplest installation, convenience and efficiency, and strong guarantee of consistent quality control. However, under long-term high-pressure / ultra-high-pressure pipeline transportation conditions, the vibration and resonance generated by the interaction between the high-pressure / ultra-high-pressure fluid medium and the natural frequency of the structure, as well as the axial creep caused by the thermal expansion and contraction effect of long-term environmental temperature changes, can easily lead to mechanical creep displacement of the ferrule, leakage, or even pipeline bursting. In other words, conventional standard ferrules are suitable for pressure ratings of around 40 MPa. In this embodiment, the conical ferrule and the self-locking reducing ferrule 9 are pushed and tightened by the ferrule locking member 6, causing the conical ferrule and the self-locking reducing ferrule 9 to abut against each other. Simultaneously, the other end of the conical ferrule forms an embedded metal wire seal with the surface of the pipe 10. Furthermore, under the action of inner radial compression, the diameter of the self-locking reducing ferrule 9 decreases, and its inner wall threads embed into the surface of the pipe 10. Figure 2 As shown, an embedded meshing connection is formed. The conical ferrule and the self-locking reducing ferrule 9 cooperate with each other. The greater the bursting tendency energy, the stronger the threaded meshing effect of the self-locking reducing ferrule 9 on the surface of the pipe 10. At the same time, it prevents the pipe 10, which is meshed with the self-locking reducing ferrule 9, from being pulled out, so as to achieve the purpose of real-time counteracting of the accumulation of bursting tendency energy. The ferrule structure provided in this embodiment can reach an ultimate pressure rating of 700~1000Mpa under actual measurement, which is far higher than that of conventional standard ferrules. It is suitable for the connection and installation of various existing clean energy and hydrogen new energy pipelines, ensuring reliable, safe and stable long-term use.

[0019] Specifically, one end of the conical ferrule is the force-bearing part, which contacts the self-locking variable diameter ferrule 9. The wall of the conical guide hole forms an inner radial compression on the conical ferrule, so that an embedded metal wire seal is formed between the conical ferrule and the surface of the pipe 10. That is, under the compression of the ferrule locking member 6, the force-bearing part of the conical ferrule moves along the conical guide hole of the ferrule screw 5 and gradually forms an embedded metal wire seal with the surface of the pipe 10.

[0020] Furthermore, the force-bearing part is connected to a ferrule cutting edge that contacts the surface of the pipe 10 via a tapered section. The tapered guide hole acts on the tapered section and causes the ferrule cutting edge to embed into the surface of the pipe 10, forming an embedded metal wire seal. That is, one end of the tapered ferrule is the ferrule cutting edge, which is connected to the force-bearing part through the tapered section to form a complete tapered ferrule. Under the action of the ferrule locking member 6, the tapered section, guided by the tapered guide hole, causes the ferrule cutting edge at one end of the tapered ferrule to embed into the surface of the pipe 10, forming an embedded metal wire seal with the pipe 10. This eliminates the need for hot work, welding, and flaw detection, making installation convenient and efficient. It also ensures consistent quality control and is suitable for large-scale indoor and outdoor projects with minimal environmental constraints and high cost-effectiveness.

[0021] Specifically, the self-locking reducing sleeve 9 includes a cylindrical portion 904 and a frustum portion 905 connected to the cylindrical portion 904. Both the cylindrical portion 904 and the frustum portion 905 are fitted onto the pipe 10. The cylindrical portion 904 abuts against the conical sleeve. Multiple continuous elastic grooves are formed on the walls of the cylindrical portion 904 and the frustum portion 905. These elastic grooves do not completely penetrate the self-locking reducing sleeve 9; that is, the self-locking reducing sleeve 9 has multiple partially penetrating elastic grooves, dividing it into multiple continuous parts, allowing it to lock in place. Under the inner radial compression of the locking element 6, the diameter gradually decreases. As the diameter gradually decreases, the threads on its inner wall gradually embed into the surface of the pipe 10 and the embedding depth increases with the increase of the compression force, thus forming an embedded meshing connection. The greater the bursting tendency energy, the stronger the threaded meshing effect of the self-locking reducing sleeve 9 on the surface of the pipe 10 becomes, while simultaneously preventing the pipe 10, which is meshed with the self-locking reducing sleeve 9, from being pulled out, so as to achieve the purpose of real-time counteracting of the accumulation of bursting tendency energy.

[0022] Furthermore, such as Figure 3 and Figure 4 As shown, the self-locking variable diameter sleeve 9 is provided with 8 elastic grooves. The 8 elastic grooves are evenly distributed around the circumference of the self-locking variable diameter sleeve 9. The elastic grooves include 4 first elastic grooves 902 that penetrate the cylindrical part 904 and extend to the frustum part 905, and 4 second elastic grooves 903 that penetrate the frustum part 905 and extend to the cylindrical part 904. The first elastic grooves 902 and the second elastic grooves 903 are arranged alternately.

[0023] Specifically, such as Figure 1 As shown, the ferrule locking member 6 includes a locking section threadedly connected to the ferrule screw 5. The locking section is connected to an inner conical section that contacts the self-locking variable diameter ferrule 9. That is, the locking section of the ferrule locking member 6 is threadedly connected to the ferrule screw 5 and allows it to move towards the ferrule direct head 1. During the displacement, the inner conical section pushes and tightens the self-locking variable diameter ferrule 9. At the same time, the inner conical section limits the self-locking variable diameter ferrule 9 and the pipe 10 that are engaged with each other, that is, it prevents the pipe 10 that is engaged with the self-locking variable diameter ferrule 9 from being pulled out, so as to achieve the purpose of real-time counteracting the accumulation of explosive tendency energy.

[0024] In one embodiment, the rigidity of the self-locking reducing ferrule 9 is stronger than that of the conical ferrule, and the rigidity of the conical ferrule is stronger than that of the pipe 10. This ensures that the threaded structure 901 on the inner wall of the self-locking reducing ferrule 9 can be embedded into the surface of the pipe 10 to form an embedded meshing connection, and the cutting edge of the conical ferrule can be embedded into the surface of the pipe 10 to form an embedded metal wire seal. At the same time, the root of the self-locking reducing ferrule 9 and the force-bearing part of the conical ferrule abut against each other to ensure the pushing and tightening effect of the conical ferrule.

[0025] In one embodiment, a plurality of locking structures 2 are sequentially fitted onto the pipe 10. The plurality of locking structures 2 are located between the ferrule direct head 1 and the ferrule locking member 6. Each locking structure 2 is provided with a conical ferrule fitted onto the pipe 10 and forming an embedded metal wire seal with the surface of the pipe 10. One end of the locking structure 2 has a locking screw and the other end has a nut that matches the locking screw. The conical ferrule is disposed inside the locking screw so that two adjacent locking structures 2 can be connected.

[0026] Specifically, such as Figure 1 As shown, a locking structure 2 is provided between the ferrule direct head 1 and the ferrule locking member 6. The end of the ferrule direct head 1 that connects with the pipe 10 is a ferrule screw 5. A tapered guide hole is provided on the ferrule screw 5, and a first tapered ferrule 4 fitted onto the pipe 10 is provided in the tapered guide hole. One end of the locking structure 2 has a locking screw, and the other end has a nut that matches the locking screw. That is, the locking structure 2 is threadedly connected to the ferrule screw 5 of the ferrule direct head 1 to push and tighten the first tapered ferrule 4 inside the ferrule screw 5, so that the cutting edge 3 of the first ferrule forms an embedded metal wire seal with the surface of the pipe 10. Inside the ferrule locking member 6, a second tapered ferrule 8 is provided to... The self-locking variable diameter ferrule 9, the first conical ferrule 4 and the second conical ferrule 8 have the same structure. The ferrule locking member 6 is threadedly connected to the locking screw of the locking structure 2. Under the pre-tightening locking torque of the ferrule locking member 6, the second ferrule cutting edge 7 and the pipe 10 form an embedded metal wire seal. The thread structure 901 of the self-locking variable diameter ferrule 9 and the pipe 10 form an embedded toothed connection. After the self-locking variable diameter ferrule 9 and the pipe 10 are toothed together, its diameter is much larger than the diameter of the inner conical section at the end of the ferrule locking member 6, which prevents the pipe 10 that is toothed together with the self-locking variable diameter ferrule 9 from being pulled out, so as to achieve the purpose of real-time counteracting the accumulation of the explosive tendency energy. Furthermore, if two or more locking structures 2 are provided between the ferrule direct head 1 and the ferrule locking member 6, the nut of the latter locking structure 2 is threadedly connected to the locking screw of the former locking structure 2 to push and tighten the conical ferrule inside the locking screw of the former locking structure 2.

[0027] To further explain, in the implementation process, the nut first independently applies a pushing torque to the force-bearing part of the first conical ferrule 4, so that the ferrule's cutting edge forms an embedded metal wire seal with the pipe. In order to ensure the effective and reliable installation of the second conical ferrule 8, the torque pretreatment is still applied by the nut independently, so that the conical ferrule and the pipe form an effective and reliable metal wire seal before the self-locking reducing ferrule 9 is installed. Instead of using the mutual contact of the two to make the self-locking reducing ferrule 9 and the pipe 10 form a self-locking mesh, this avoids the transmission loss of the pushing and tightening force. It should be noted that in this embodiment, a multi-stage connection structure is formed. The number of tapered ferrules cascaded can be multiplied according to the working pressure level requirements of high-pressure / ultra-high-pressure pipelines. While relatively independently forming cascaded embedded high-pressure / ultra-high-pressure pipeline annular diameter metal wires for sealing and strength assurance, the structure is also enhanced as a whole under the action of each individual tightening nut. Through the combined vibration of the N-level damping, attenuation, and isolation ferrules, and the effects of thermal expansion and contraction and creep displacement due to ambient temperature, the cascaded enhancement is achieved, providing a safe and reliable function. Furthermore, based on the cascaded structure, a self-locking variable diameter ferrule 9 and a tapered ferrule in opposite contact are adopted. Under the pre-tightening locking torque of the ferrule locking element 6, the ferrule cutting edge and... The pipe 10 forms an embedded metal wire seal. The self-locking reducing ferrule 9 becomes stronger through a forced threaded engagement with the surface of the pipe 10. After the self-locking reducing ferrule 9 and the pipe 10 are engaged as one, its diameter is much larger than the diameter of the inner cone section at the end of the ferrule locking member 6. This prevents the pipe 10 from being pulled out after being engaged with the self-locking reducing ferrule 9, thus achieving the purpose of real-time counteracting the accumulation of the tendency to burst. This ensures convenient, efficient, and cost-effective installation without welding, open flame, or flaw detection. It also prevents burst accidents that may occur when using ferrule installation connections for high-pressure / ultra-high-pressure pipelines, ensuring its long-term reliable, safe, and stable application. It is suitable for widespread use in the installation and connection of high-pressure or ultra-high-pressure fluid pipelines 10.

[0028] In the description of this utility model, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] While specific embodiments of the present invention have been described herein with reference to them, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A burst-proof structure for pipeline ferrules, characterized in that, The device includes a ferrule direct head and a pipe that connects to it. One end of the ferrule direct head that connects to the pipe is a ferrule screw. The ferrule screw has a tapered guide hole. A tapered ferrule fitted onto the pipe is placed in the tapered guide hole. A ferrule locking member is also installed on the pipe. A self-locking reducing ferrule fitted onto the pipe is placed in the gap between the ferrule locking member and the pipe. The inner wall of the self-locking reducing ferrule has a threaded structure. One end of the ferrule locking member is threadedly connected to the ferrule screw, and the other end is in contact with the self-locking reducing ferrule. The ferrule locking member is used to push and tighten the conical ferrule and the self-locking reducing ferrule so that the conical ferrule and the self-locking reducing ferrule abut against each other, and so that the self-locking reducing ferrule is embedded and engaged with the pipe surface, and so that the conical ferrule and the pipe surface form an embedded metal wire seal.

2. The anti-explosion structure for a pipeline ferrule according to claim 1, characterized in that, One end of the conical ferrule is a force-bearing part, which contacts the self-locking variable diameter ferrule. The wall of the conical guide hole forms an inner radial compression on the conical ferrule, so that an embedded metal wire seal is formed between the conical ferrule and the pipe surface.

3. The anti-explosion structure for pipeline ferrules according to claim 2, characterized in that, The force-bearing part is connected to a ferrule cutting edge that contacts the surface of the pipe via a tapered section. The tapered guide hole acts on the tapered section and causes the ferrule cutting edge to embed into the surface of the pipe to form an embedded metal wire seal.

4. The anti-explosion structure for a pipeline ferrule according to claim 1, characterized in that, The self-locking reducing sleeve includes a cylindrical part and a frustum part connected to the cylindrical part. Both the cylindrical part and the frustum part are fitted onto the pipe. The cylindrical part abuts against the conical sleeve. Multiple continuous elastic grooves are formed on the wall surface of the cylindrical part and the frustum part. The elastic grooves do not completely penetrate the self-locking reducing sleeve.

5. The anti-explosion structure for pipeline ferrules according to claim 4, characterized in that, The multiple elastic grooves are evenly spaced along the circumference of the self-locking variable diameter ferrule.

6. The anti-explosion structure for a pipeline ferrule according to claim 4 or 5, characterized in that, The elastic groove includes a first elastic groove that penetrates the cylindrical portion and extends to the frustum portion, and a second elastic groove that penetrates the frustum portion and extends to the cylindrical portion, wherein the first elastic groove and the second elastic groove are arranged alternately.

7. The anti-explosion structure for pipeline ferrules according to claim 1, characterized in that, The self-locking reducing ferrule has a higher stiffness than the tapered ferrule, and the tapered ferrule has a higher stiffness than the pipe.

8. The anti-explosion structure for pipeline ferrules according to claim 4, characterized in that, The ferrule locking component includes a locking section threadedly connected to the ferrule screw, and the locking section is connected to an inner tapered section that contacts the self-locking variable diameter ferrule.

9. The anti-explosion structure for pipeline ferrules according to claim 1, characterized in that, The pipe is also sequentially fitted with multiple locking structures, which are located between the ferrule direct head and the ferrule locking member. Each locking structure contains a conical ferrule that is fitted onto the pipe and forms an embedded metal wire seal with the pipe surface.

10. The anti-explosion structure for a pipeline ferrule according to claim 9, characterized in that, One end of the locking structure has a locking screw, and the other end has a nut that matches the locking screw. The conical sleeve is disposed inside the locking screw to allow two adjacent locking structures to be connected.

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