Ultrahigh-pressure pipeline connecting assembly

Abstract

The utility model relates to the technical field of pipeline connecting assemblies, and discloses an ultrahigh-pressure pipeline connecting assembly which comprises an ultrahigh-pressure pipeline and a body, a conical end is arranged at the end of the ultrahigh-pressure pipeline, an external thread section is arranged at the position, close to the end, of the ultrahigh-pressure pipeline, a threaded hole is formed in the end of the body, and a stepped hole is formed in the bottom of the threaded hole. The conical inclined surface of the conical end is attached to the edge of the table surface of the stepped hole; the outer side of the ultrahigh-pressure pipeline is connected with a threaded sleeve, an inner hole with the inner diameter equal to the outer diameter of the ultrahigh-pressure pipeline is formed in the threaded sleeve, an inner threaded section is arranged in the inner hole of the threaded sleeve, the outer side of the ultrahigh-pressure pipeline is further wrapped with a connecting sleeve, and an outer threaded section is arranged on the outer wall of the connecting sleeve. The spiral direction of the internal thread section of the threaded hole is opposite to that of the external thread section of the ultrahigh-pressure pipeline; the threaded sleeve is clamped in a mounting hole of the connecting sleeve, and the mounting hole of the connecting sleeve wraps the outer side of the threaded sleeve in two directions.

Description

Technical Field

[0001] This utility model relates to the technical field of pipeline connection components, specifically an ultra-high pressure pipeline connection component. Background Technology

[0002] Commonly used pipe connection methods include the following:

[0003] Threaded connections: These connect pipes to each other or to valves using internal and external threads. This type of connection is simple to manufacture and use, reliable, convenient, versatile, and reusable. It is mainly used for connecting steel pipes, copper pipes, and high-pressure pipelines. However, it has lower pressure resistance, and the threads are prone to corrosion and leakage; therefore, it is mostly used for exposed pipelines.

[0004] Welded connections: As the most traditional and commonly used connection method, welded joints are strong, durable, and leak-proof, with high joint strength and tightness, requiring minimal maintenance after use. However, welded joints are prone to significant welding deformation and residual stress, affecting the joint's load-bearing capacity. Furthermore, stress concentration can easily occur at the connection between the weld and the pipe, significantly impacting the joint's fatigue fracture potential. Welded connections are primarily used for installing pipes with larger diameters.

[0005] Flange connection: Two pipes or fittings are each fixed to a flange, a gasket is placed between the two flanges, and finally, bolts are used to tighten the two flanges to make them tightly connected. Flange connections have good strength and tightness, are applicable to a wide range of sizes, and can be used on equipment and pipelines. However, flange connections cannot be quickly assembled and disassembled, and the manufacturing cost is relatively high. They are mostly used for connecting valves, check valves, water meters, water pumps, etc. in main pipelines, as well as pipe sections that require frequent disassembly and maintenance.

[0006] Compression fitting connection: The pipe is pressed onto the fitting by tightening a lock nut and an open compression ring. It has a short sealing surface, is easy and simple to install without special tools, and can be disassembled. This connection method is generally suitable for smaller water and gas systems, but its safety factor is relatively low.

[0007] Heat fusion connection: The pipe ends are heated and melted using a heat fusion machine, then quickly joined together to form a stable connection. This connection method is mainly used for domestic water pipe connections, such as PPR and PE pipes. Because it has high requirements for the worker's construction skills, tools, pipe materials, and construction temperature, it is the most widely used in home water supply systems, and has the advantages of strong and durable joints and is not prone to leakage.

[0008] Press-fit connection: This method utilizes the deformation of O-rings under pressure to create a seal. While convenient and reliable, this method has a relatively limited range of applications and a lower safety factor. Stainless steel press-fit pipe fittings offer advantages such as water quality protection, strong corrosion resistance, and long service life.

[0009] The defects in the existing technology are as follows: conventional pipeline connection methods, except for welding and hot fusion, all use seals. The load-bearing capacity of seals is limited, and the load-bearing capacity of various connection methods is also limited. When the pressure reaches 250MPa or even 1000MPa, conventional pipeline connection methods cannot meet the usage requirements, and the connection is prone to loosening. Utility Model Content

[0010] (a) Technical problems to be solved

[0011] To address the shortcomings of existing technologies, this utility model provides an ultra-high pressure pipeline connection component, which has the advantages of being safe and reliable under ultra-high pressure and high temperature conditions, and solves the problem of limited load-bearing capacity of conventional connection methods in existing technologies.

[0012] (II) Technical Solution

[0013] To achieve the above objectives, this utility model provides the following technical solution:

[0014] An ultra-high pressure pipeline connection assembly includes an ultra-high pressure pipeline and a body. The ultra-high pressure pipeline has a tapered end and an external threaded section near the end. The body has a threaded hole at the end and a stepped hole at the bottom of the threaded hole. The tapered slope of the tapered end fits against the edge of the stepped hole.

[0015] The ultra-high pressure pipeline is connected to a threaded sleeve on the outside. The threaded sleeve has an inner hole with the same inner diameter as the outer diameter of the ultra-high pressure pipeline. The inner hole of the threaded sleeve has an internal thread section. The internal thread section of the inner hole of the threaded sleeve is connected to the external thread section of the outer wall of the ultra-high pressure pipeline by threads. The threaded hole has an internal thread section. The ultra-high pressure pipeline is also wrapped with a connecting sleeve. The outer wall of the connecting sleeve has an external thread section. The external thread section of the outer wall of the connecting sleeve is connected to the internal thread section of the inner wall of the threaded hole by threads. The helical direction of the internal thread section of the threaded hole is opposite to that of the external thread section of the ultra-high pressure pipeline.

[0016] The connecting sleeve is provided with an inner hole with the same inner diameter as the outer diameter of the ultra-high pressure pipeline. The inner hole of the connecting sleeve is provided with an installation hole at the position of the threaded sleeve. The inner diameter of the installation hole of the connecting sleeve is the same as the outer diameter of the threaded sleeve. The threaded sleeve is locked in the installation hole of the connecting sleeve. The installation hole of the connecting sleeve wraps around the outside of the threaded sleeve from two directions. The contact surfaces of the connecting sleeve and the threaded sleeve are smoothly connected.

[0017] Preferably, the cavity at the bottom of the threaded hole at the end of the threaded sleeve and the connecting sleeve forms a bottom cavity. A leakage detection mechanism is provided in the bottom cavity. The leakage detection mechanism is used to detect changes in the internal air pressure of the bottom cavity. When leakage occurs at the conical end and the stepped hole, the pressure inside the bottom cavity increases. By detecting the air pressure inside the bottom cavity through the leakage detection mechanism, it can be determined whether the connection of the ultra-high pressure pipeline is loose.

[0018] Preferably, a leakage locking mechanism is provided on the contact surface between the outer wall of the threaded sleeve and the inner wall of the mounting hole of the connecting sleeve, the leakage locking mechanism comprising:

[0019] A tablet compression groove is provided at the end of the connecting sleeve, inside the connecting sleeve between the threaded sleeve and the body, and the tablet compression groove has an opening near the bottom cavity;

[0020] The pressure plate is set in the pressure plate groove and slides in the direction of sliding parallel to the central axis of the ultra-high pressure pipeline in the threaded hole. The outer side of the pressure plate is attached to the inner wall of the pressure plate groove. A distance sensor or pressure sensor is set at the bottom of the pressure plate groove away from the bottom cavity to detect the position of the pressure plate. The leakage detection mechanism is a mechanism composed of the pressure plate groove, the pressure plate and the distance sensor or pressure sensor. The pressure in the bottom cavity is determined by detecting the position of the pressure plate.

[0021] The locking tongue has a through hole near the inner wall of the threaded sleeve in the pressure plate groove. A locking tongue is slidably connected in the through hole. After the threaded sleeve is installed, a locking groove is set at the position corresponding to the locking tongue. A sloping top surface is set on the side of the pressure plate away from the bottom cavity near the threaded sleeve. The sloping surface of the sloping top surface abuts against the end of the locking tongue. When the pressure plate slides away from the bottom cavity, it pushes the locking tongue to slide into the locking groove, thereby locking the threaded sleeve and the connecting sleeve by the locking tongue.

[0022] Preferably, the inner wall of the pressing plate groove near the body is also provided with a through hole, and a second locking tongue is slidably connected in the through hole. After the body is installed, a second locking groove is provided at the position corresponding to the second locking tongue. A second inclined top surface is provided on the side of the pressing plate away from the bottom cavity and close to the body. The inclined surface of the second inclined top surface abuts against the end of the second locking tongue. When the pressing plate slides away from the bottom cavity, it pushes the second locking tongue to slide into the second locking groove, thereby locking the connecting sleeve and the body by the locking tongue.

[0023] Preferably, a return spring is provided in the through hole of the connecting sleeve for installing the locking tongue. One end of the return spring is installed in the through hole and the other end is pressed against the locking tongue. When the pressure plate is located at the end near the bottom cavity, the return spring pushes the locking tongue to one side of the pressure plate groove, so that the end of the locking tongue near the threaded sleeve is completely hidden in the through hole of the connecting sleeve.

[0024] Preferably, the leak detection mechanism is a gas detection port installed in the bottom cavity, with one end of the gas detection port connected to the bottom cavity and the other end connected to a pressure sensor for detecting the pressure in the bottom cavity.

[0025] Preferably, the tapered end is tapered, the surface roughness of the tapered end is Ra0.2, and it is in close contact with the stepped hole. The roundness of the stepped hole is 0.01 and the concentricity is 0.01.

[0026] Preferably, the external thread section on the outer wall of the ultra-high pressure pipeline is a left-hand thread.

[0027] Preferably, the internal thread section of the threaded hole is a right-hand thread.

[0028] Preferably, an elastic sealing gasket is provided between the end of the threaded sleeve away from the bottom cavity and the connecting sleeve.

[0029] (III) Beneficial Effects

[0030] Compared with the prior art, this utility model provides an ultra-high pressure pipeline connection assembly, which has the following beneficial effects:

[0031] 1. This ultra-high pressure pipeline connection assembly features a tapered end of the ultra-high pressure pipeline that mates with a stepped hole in the main body. The tapered bevel of the tapered end fits against the edge of the stepped hole platform, forming a sealing surface that effectively prevents high-pressure fluid leakage and ensures sealing performance. The threaded sleeve is threadedly connected to the external threaded section of the ultra-high pressure pipeline, while the external threaded section of the connecting sleeve is connected to the internal threaded section of the threaded hole in the main body. Furthermore, the threaded hole and the external threaded section of the ultra-high pressure pipeline have opposite helical directions. This design allows for a reverse force to be generated on the threaded sleeve when tightening the connecting sleeve, causing them to press against each other, further enhancing the tightness and stability of the connection. This prevents loosening due to vibration or other factors under ultra-high pressure conditions. The mounting hole of the connecting sleeve wraps around the outside of the threaded sleeve from two directions, increasing the reverse force of the reverse thread. This not only facilitates installation and disassembly but also ensures stable operation of the connection assembly under ultra-high pressure conditions while maintaining a compact structure, thus improving overall reliability and service life.

[0032] 2. This ultra-high pressure pipeline connection assembly, through the cooperation of a bottom cavity and a leak detection mechanism, achieves accurate monitoring of leaks at ultra-high pressure pipeline connections. The bottom cavity serves as a sealed pressure monitoring space. When leaks occur at the conical end and stepped hole, high-pressure fluid enters the bottom cavity, causing an increase in pressure. The leak detection mechanism monitors the positional changes of the pressure plate in real time, thereby determining the air pressure within the bottom cavity and accurately identifying whether the connection is loose or leaking. This facilitates timely maintenance and avoids potential safety hazards.

[0033] 3. This ultra-high pressure pipeline connection assembly, by placing the leakage detection mechanism inside the leakage locking mechanism, consists of a pressure plate groove, a pressure plate, and a distance sensor or pressure sensor, which produces an emergency protection effect. When the pressure plate slides away from the bottom cavity, its inclined top surface pushes the locking tongue to slide into the locking groove of the threaded sleeve, so that the threaded sleeve and the connecting sleeve are quickly locked. This design automatically enhances the stability of the connection through mechanical structure at the moment of leakage, prevents the leakage from expanding further, reduces the risk caused by ultra-high pressure fluid leakage, and greatly improves the safety and reliability of the ultra-high pressure pipeline connection assembly under complex working conditions, providing dual protection for the stable operation of the equipment. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model when it is connected to the main body.

[0035] Figure 2 This is a cross-sectional view of one embodiment of the present utility model.

[0036] Figure 3 This is a cross-sectional view of another embodiment of the present utility model.

[0037] Figure 4 This is a half-sectional perspective view of Embodiment 1 of this utility model.

[0038] Figure 5 This is an exploded view of Embodiment 1 of this utility model.

[0039] Figure 6 This is a structural schematic diagram of Embodiment 2 of the present invention.

[0040] Figure 7 This is Embodiment 2 of the present utility model. Figure 6 A magnified view of a portion of region A in the middle.

[0041] Figure 8 This is a schematic diagram of the threaded sleeve in Embodiment 2 of this utility model.

[0042] Figure 9 This is a half-sectional perspective view of the connecting sleeve in Embodiment 2 of this utility model.

[0043] In the diagram: 1. Ultra-high pressure pipeline; 2. Body; 3. Connecting sleeve; 4. Threaded sleeve; 5. Leakage detection mechanism; 6. Leakage locking mechanism; 11. Conical end; 21. Threaded hole; 211. Bottom cavity; 22. Stepped hole; 41. Locking groove; 61. Pressing plate groove; 62. Pressing plate; 621. Sloping top surface; 63. Locking tongue. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0045] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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.

[0046] In addition, a fixed connection refers to a connection in which parts or components are fixed and there is no relative movement; a transmission connection refers to a connection in which mechanical motion or torque is transmitted to other working parts through a transmission component; a sliding connection refers to a connection in which two objects are in contact but not fixed and can slide relative to each other; and a rotational connection refers to a connection in which two objects are in contact but not fixed and can rotate relative to each other.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0048] Example 1:

[0049] This embodiment provides an ultra-high pressure pipeline connection assembly, which has the following technical features.

[0050] Please see Figure 1-5 An ultra-high pressure pipeline connection assembly includes an ultra-high pressure pipeline 1 and a body 2. The ultra-high pressure pipeline 1 is provided with a tapered end 11 at its end and an external threaded section is provided near the end of the ultra-high pressure pipeline 1. The body 2 is provided with a threaded hole 21 at its end and a stepped hole 22 at the bottom of the threaded hole 21. The tapered slope of the tapered end 11 is attached to the edge of the platform of the stepped hole 22.

[0051] A threaded sleeve 4 is connected to the outside of the ultra-high pressure pipeline 1. The threaded sleeve 4 has an inner hole with the same inner diameter as the outer diameter of the ultra-high pressure pipeline 1. The inner hole of the threaded sleeve 4 has an internal thread section. The internal thread section of the inner hole of the threaded sleeve 4 is connected to the external thread section of the outer wall of the ultra-high pressure pipeline 1 by threads. An internal thread section is provided in the threaded hole 21. The ultra-high pressure pipeline 1 is also wrapped with a connecting sleeve 3. The outer wall of the connecting sleeve 3 has an external thread section. The external thread section of the outer wall of the connecting sleeve 3 is connected to the internal thread section of the inner wall of the threaded hole 21 by threads. The helical direction of the internal thread section of the threaded hole 21 is opposite to that of the external thread section of the ultra-high pressure pipeline 1.

[0052] The connecting sleeve 3 has an inner hole with the same inner diameter as the outer diameter of the ultra-high pressure pipeline 1. The inner hole of the connecting sleeve 3 has an installation hole at the position of the threaded sleeve 4. The inner diameter of the installation hole of the connecting sleeve 3 is the same as the outer diameter of the threaded sleeve 4. The threaded sleeve 4 is inserted into the installation hole of the connecting sleeve 3. The installation hole of the connecting sleeve 3 wraps around the outside of the threaded sleeve 4 from two directions. The contact surfaces of the connecting sleeve 3 and the threaded sleeve 4 are smoothly connected.

[0053] In an optional embodiment, the cavity left at the bottom of the threaded hole 21 at the ends of the threaded sleeve 4 and the connecting sleeve 3 forms a bottom cavity 211. A leakage detection mechanism 5 is provided in the bottom cavity 211. The leakage detection mechanism 5 is used to detect the change in internal air pressure of the bottom cavity 211. When leakage occurs at the conical end 11 and the stepped hole 22, the pressure inside the bottom cavity 211 increases. By detecting the air pressure inside the bottom cavity 211 through the leakage detection mechanism 5, it can be determined whether the connection of the ultra-high pressure pipeline 1 is loose.

[0054] In an optional embodiment, the leak detection mechanism 5 is a gas detection port installed in the bottom cavity 211. One end of the gas detection port is connected to the bottom cavity 211 and the other end is connected to a pressure sensor for detecting the pressure in the bottom cavity 211.

[0055] In an optional embodiment, the tapered end 11 is tapered, and the surface roughness of the tapered end 11 reaches Ra0.2, which is in close contact with the stepped hole 22. The roundness of the stepped hole 22 is 0.01, and the concentricity is 0.01.

[0056] In an optional embodiment, the external thread section provided on the outer wall of the ultra-high pressure pipeline 1 is a left-hand thread.

[0057] In an optional embodiment, the internal thread segment of the threaded hole 21 is a right-hand thread.

[0058] In an optional embodiment, an elastic sealing gasket is provided between the end of the threaded sleeve 4 away from the bottom cavity 211 and the connecting sleeve 3.

[0059] Example 2:

[0060] This embodiment provides an ultra-high pressure pipeline connection assembly, which has the following technical features.

[0061] Please see Figure 6-9 An ultra-high pressure pipeline connection assembly includes an ultra-high pressure pipeline 1 and a body 2. The ultra-high pressure pipeline 1 is provided with a tapered end 11 at its end and an external threaded section is provided near the end of the ultra-high pressure pipeline 1. The body 2 is provided with a threaded hole 21 at its end and a stepped hole 22 at the bottom of the threaded hole 21. The tapered slope of the tapered end 11 is attached to the edge of the platform of the stepped hole 22.

[0062] A threaded sleeve 4 is connected to the outside of the ultra-high pressure pipeline 1. The threaded sleeve 4 has an inner hole with the same inner diameter as the outer diameter of the ultra-high pressure pipeline 1. The inner hole of the threaded sleeve 4 has an internal thread section. The internal thread section of the inner hole of the threaded sleeve 4 is connected to the external thread section of the outer wall of the ultra-high pressure pipeline 1 by threads. An internal thread section is provided in the threaded hole 21. The ultra-high pressure pipeline 1 is also wrapped with a connecting sleeve 3. The outer wall of the connecting sleeve 3 has an external thread section. The external thread section of the outer wall of the connecting sleeve 3 is connected to the internal thread section of the inner wall of the threaded hole 21 by threads. The helical direction of the internal thread section of the threaded hole 21 is opposite to that of the external thread section of the ultra-high pressure pipeline 1.

[0063] The connecting sleeve 3 has an inner hole with the same inner diameter as the outer diameter of the ultra-high pressure pipeline 1. The inner hole of the connecting sleeve 3 has an installation hole at the position of the threaded sleeve 4. The inner diameter of the installation hole of the connecting sleeve 3 is the same as the outer diameter of the threaded sleeve 4. The threaded sleeve 4 is inserted into the installation hole of the connecting sleeve 3. The installation hole of the connecting sleeve 3 wraps around the outside of the threaded sleeve 4 from two directions. The contact surfaces of the connecting sleeve 3 and the threaded sleeve 4 are smoothly connected.

[0064] In an optional embodiment, the cavity left at the bottom of the threaded hole 21 at the ends of the threaded sleeve 4 and the connecting sleeve 3 forms a bottom cavity 211. A leakage detection mechanism 5 is provided in the bottom cavity 211. The leakage detection mechanism 5 is used to detect the change in internal air pressure of the bottom cavity 211. When leakage occurs at the conical end 11 and the stepped hole 22, the pressure inside the bottom cavity 211 increases. By detecting the air pressure inside the bottom cavity 211 through the leakage detection mechanism 5, it can be determined whether the connection of the ultra-high pressure pipeline 1 is loose.

[0065] In an optional embodiment, a leakage locking mechanism 6 is provided on the contact surface between the outer wall of the threaded sleeve 4 and the inner wall of the mounting hole of the connecting sleeve 3. The leakage locking mechanism 6 includes:

[0066] A tablet compression groove 61 is provided at the end of the connecting sleeve 3, located inside the connecting sleeve 3 between the threaded sleeve 4 and the body 2. The tablet compression groove 61 has an opening near the bottom cavity 211.

[0067] The pressure plate 62 is set in the pressure plate slide groove 61 and slides in a direction parallel to the central axis of the ultra-high pressure pipeline 1 in the threaded hole 21. The outer side of the pressure plate 62 is attached to the inner wall of the pressure plate slide groove 61. A distance sensor or pressure sensor is set at the bottom of the pressure plate slide groove 61 away from the bottom cavity 211 to detect the position of the pressure plate 62. The leakage detection mechanism 5 is a mechanism composed of the pressure plate slide groove 61, the pressure plate 62 and the distance sensor or pressure sensor. The pressure in the bottom cavity 211 is determined by detecting the position of the pressure plate 62.

[0068] The locking tongue 63 has a through hole on the inner wall of the pressure plate groove 61 near the threaded sleeve 4. The locking tongue 63 is slidably connected in the through hole. After the threaded sleeve 4 is installed, a locking groove 41 is set at the position corresponding to the locking tongue 63. The pressure plate 62 has an inclined top surface 621 on the side near the threaded sleeve 4 at the end away from the bottom cavity 211. The inclined surface of the inclined top surface 621 abuts against the end of the locking tongue 63. When the pressure plate 62 slides to the side away from the bottom cavity 211, it pushes the locking tongue 63 to slide into the locking groove 41, thereby locking the threaded sleeve 4 and the connecting sleeve 3 by the locking tongue 63.

[0069] In an optional embodiment, the pressure plate groove 61 is also provided with a through hole near the inner wall of the body 2, and a second locking tongue is slidably connected in the through hole. After the body 2 is installed, a second locking groove is provided at the position corresponding to the second locking tongue. A second inclined top surface is provided on the side of the pressure plate 62 away from the bottom cavity 211 and close to the body 2. The inclined surface of the second inclined top surface abuts against the end of the second locking tongue. When the pressure plate 62 slides away from the bottom cavity 211, it pushes the second locking tongue to slide into the second locking groove, thereby locking the connecting sleeve 3 and the body 2 through the locking tongue 63.

[0070] In an optional embodiment, a return spring is provided in the through hole of the connecting sleeve 3 for mounting the locking tongue 63. One end of the return spring is installed in the through hole and the other end is pressed against the locking tongue 63. When the pressure plate 62 is located at the end close to the bottom cavity 211, the return spring pushes the locking tongue 63 to one side of the pressure plate groove 61, so that the end of the locking tongue 63 close to the threaded sleeve 4 is completely hidden in the through hole of the connecting sleeve 3.

[0071] Working principle: When leakage occurs in the bottom cavity 211, the pressure plate 62 in the pressure plate groove 61 slides away from the bottom cavity 211 under the action of increased pressure in the bottom cavity 211; the inclined top surface 621 of the end of the pressure plate 62 away from the bottom cavity 211, which is close to the threaded sleeve 4, pushes the locking tongue 63 into the locking groove 41 of the threaded sleeve 4 when the pressure plate 62 slides, thereby locking the threaded sleeve 4 and the connecting sleeve 3; the second inclined top surface of the end of the pressure plate 62 away from the bottom cavity 211, which is close to the body 2, pushes the second locking tongue into the second locking groove of the body 2 when the pressure plate 62 slides, thereby locking the connecting sleeve 3 and the body 2.

[0072] In summary, this ultra-high pressure pipeline connection assembly, by setting the tapered end 11 at the end of the ultra-high pressure pipeline 1 to cooperate with the stepped hole 22 of the body 2, with the tapered inclined surface of the tapered end 11 fitting against the edge of the stepped hole 22, forms a sealing surface, effectively preventing high-pressure fluid leakage and ensuring sealing performance. The threaded sleeve 4 is threadedly connected to the external thread section of the ultra-high pressure pipeline 1, and the external thread section of the connecting sleeve 3 is connected to the internal thread section of the threaded hole 21 of the body 2. Moreover, the spiral direction of the threaded hole 21 is opposite to that of the external thread section of the ultra-high pressure pipeline 1. This design allows the threaded sleeve 4 to generate a reverse force when the connecting sleeve 3 is tightened, causing the two to squeeze each other, further enhancing the tightness and stability of the connection, and preventing loosening due to vibration and other factors in ultra-high pressure environments. The mounting hole of the connecting sleeve 3 wraps around the outside of the threaded sleeve 4 from two directions, increasing the reverse force of the reverse thread. This not only facilitates installation and disassembly, but also ensures the stable operation of the connection assembly under ultra-high pressure conditions while maintaining a compact structure, thus improving overall reliability and service life.

[0073] This ultra-high pressure pipeline connection assembly, through the cooperation of the bottom cavity 211 and the leakage detection mechanism 5, achieves accurate monitoring of leakage at the connection of the ultra-high pressure pipeline 1. The bottom cavity 211 serves as a sealed pressure monitoring space. When leakage occurs at the conical end 11 and the stepped hole 22, high-pressure fluid enters the bottom cavity 211, causing an increase in pressure. The leakage detection mechanism 5 detects the position change of the pressure plate 62 in real time, thereby judging the air pressure in the bottom cavity 211, accurately knowing whether the connection is loose and leaking, facilitating timely maintenance, and avoiding safety hazards.

[0074] This ultra-high pressure pipeline connection assembly, by placing the leakage detection mechanism 5 inside the leakage locking mechanism 6, consists of a pressure plate groove 61, a pressure plate 62, and a distance sensor or pressure sensor, produces an emergency protection effect. When the pressure plate 62 slides away from the bottom cavity 211, its inclined top surface 621 pushes the locking tongue 63 to slide into the locking groove 41 of the threaded sleeve 4, so that the threaded sleeve 4 and the connecting sleeve 3 are quickly locked. This design automatically enhances the stability of the connection through mechanical structure at the moment of leakage, prevents the leakage from expanding further, reduces the risk caused by ultra-high pressure fluid leakage, and greatly improves the safety and reliability of the ultra-high pressure pipeline connection assembly under complex working conditions, providing dual protection for the stable operation of the equipment.

[0075] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0076] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An ultrahigh-pressure pipe connection assembly comprising an ultrahigh-pressure pipe (1) and a body (2), characterized in that, The ultra-high pressure pipeline (1) is provided with a tapered end (11) at the end, and an external thread section is provided near the end of the ultra-high pressure pipeline (1). The body (2) is provided with a threaded hole (21) at the end, and a stepped hole (22) is provided at the bottom of the threaded hole (21). The tapered slope of the tapered end (11) is attached to the edge of the platform of the stepped hole (22). The ultra-high pressure pipeline (1) is connected to a threaded sleeve (4) on the outside. The threaded sleeve (4) has an inner hole with the same inner diameter as the outer diameter of the ultra-high pressure pipeline (1). The inner hole of the threaded sleeve (4) has an internal thread section. The internal thread section of the inner hole of the threaded sleeve (4) is connected to the external thread section of the outer wall of the ultra-high pressure pipeline (1) by threads. The threaded hole (21) has an internal thread section. The ultra-high pressure pipeline (1) is also wrapped with a connecting sleeve (3). The outer wall of the connecting sleeve (3) has an external thread section. The external thread section of the outer wall of the connecting sleeve (3) is connected to the internal thread section of the inner wall of the threaded hole (21) by threads. The internal thread section of the threaded hole (21) and the external thread section of the ultra-high pressure pipeline (1) have opposite spiral directions. The connecting sleeve (3) is provided with an inner hole with the same inner diameter as the outer diameter of the ultra-high pressure pipeline (1). The inner hole of the connecting sleeve (3) is provided with an installation hole at the position of the threaded sleeve (4). The inner diameter of the installation hole of the connecting sleeve (3) is the same as the outer diameter of the threaded sleeve (4). The threaded sleeve (4) is stuck in the installation hole of the connecting sleeve (3). The installation hole of the connecting sleeve (3) wraps around the outside of the threaded sleeve (4) from two directions. The contact surfaces of the connecting sleeve (3) and the threaded sleeve (4) are smoothly connected.

2. An ultrahigh pressure pipe coupling assembly according to claim 1, wherein The bottom cavity (211) is formed by the cavity left at the end of the threaded sleeve (4) and the connecting sleeve (3) at the bottom of the threaded hole (21). A leakage detection mechanism (5) is provided in the bottom cavity (211). The leakage detection mechanism (5) is used to detect the change of air pressure in the bottom cavity (211). When leakage occurs at the conical end (11) and the stepped hole (22), the pressure in the bottom cavity (211) increases. By detecting the air pressure in the bottom cavity (211) through the leakage detection mechanism (5), it can be determined whether the connection of the ultra-high pressure pipeline (1) is loose.

3. An ultrahigh pressure pipe coupling assembly according to claim 2, wherein, A leakage locking mechanism (6) is provided on the contact surface between the outer wall of the threaded sleeve (4) and the inner wall of the mounting hole of the connecting sleeve (3). The leakage locking mechanism (6) includes: The tablet compression groove (61) is provided at the end of the connecting sleeve (3) and is located inside the connecting sleeve (3) between the threaded sleeve (4) and the body (2). The tablet compression groove (61) has an opening near the bottom cavity (211). The pressure plate (62) is set in the pressure plate groove (61) and slides in the direction of sliding parallel to the central axis of the ultra-high pressure pipeline (1) in the threaded hole (21). The outer side of the pressure plate (62) is attached to the inner wall of the pressure plate groove (61). A distance sensor or pressure sensor is provided at the bottom of the pressure plate groove (61) away from the bottom cavity (211) to detect the position of the pressure plate (62). The leakage detection mechanism (5) is a mechanism composed of the pressure plate groove (61), the pressure plate (62) and the distance sensor or pressure sensor. The pressure in the bottom cavity (211) is determined by detecting the position of the pressure plate (62). The locking tongue (63) is provided with a through hole on the inner wall of the pressure plate groove (61) near the threaded sleeve (4). The locking tongue (63) is slidably connected in the through hole. After the threaded sleeve (4) is installed, a locking groove (41) is provided at the position corresponding to the locking tongue (63). The pressure plate (62) is provided with an inclined top surface (621) on the side of the end away from the bottom cavity (211) near the threaded sleeve (4). The inclined surface of the inclined top surface (621) is pressed against the end of the locking tongue (63). When the pressure plate (62) slides to the side away from the bottom cavity (211), it pushes the locking tongue (63) to slide into the locking groove (41), thereby locking the threaded sleeve (4) and the connecting sleeve (3) through the locking tongue (63).

4. An ultrahigh pressure tubing connection assembly according to claim 3, wherein, The pressure plate groove (61) is also provided with a through hole near the inner wall of the body (2). A second locking tongue is slidably connected in the through hole. After the body (2) is installed, a second locking groove is provided at the position corresponding to the second locking tongue. A second inclined top surface is provided on the side of the pressure plate (62) away from the bottom cavity (211) and close to the body (2). The inclined surface of the second inclined top surface is pressed against the end of the second locking tongue. When the pressure plate (62) slides away from the bottom cavity (211), it pushes the second locking tongue to slide into the second locking groove, thereby locking the connecting sleeve (3) and the body (2) through the locking tongue (63).

5. An ultrahigh pressure tubing connection assembly according to claim 4, wherein, A reset spring is installed in the through hole of the connecting sleeve (3) for installing the locking tongue (63). One end of the reset spring is installed in the through hole and the other end is pressed against the locking tongue (63). When the pressure plate (62) is located at the end close to the bottom cavity (211), the reset spring pushes the locking tongue (63) to one side of the pressure plate groove (61), so that the end of the locking tongue (63) close to the threaded sleeve (4) is completely hidden in the through hole of the connecting sleeve (3).

6. An ultrahigh pressure tubing connection assembly according to claim 2, wherein, The leak detection mechanism (5) is a gas detection hole installed in the bottom cavity (211). One end of the gas detection hole is connected to the bottom cavity (211), and the other end is connected to a pressure sensor to detect the pressure in the bottom cavity (211).

7. An ultrahigh pressure tubing connection assembly according to claim 1, wherein The tapered end (11) is tapered, and the surface roughness of the tapered end (11) reaches Ra0.

2. It is in close contact with the stepped hole (22). The roundness of the stepped hole (22) is 0.01 and the concentricity is 0.

01.

8. An ultrahigh pressure tubing connection assembly according to claim 1, wherein, The external thread section on the outer wall of the ultra-high pressure pipeline (1) is a left-hand thread.

9. An ultrahigh pressure tubing connection assembly according to claim 1, wherein, The internal thread section of the threaded hole (21) is a right-hand thread.

10. An ultrahigh pressure tubing connection assembly according to claim 2, wherein, An elastic sealing gasket is provided between the end of the threaded sleeve (4) away from the bottom cavity (211) and the connecting sleeve (3).

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