A fluid quick connector

Abstract

The utility model discloses a fluid quick connector belongs to fluid pipeline connection field, has solved the problem of poor sealing and short service life of prior art, and the technical scheme that solves this problem includes first joint, second joint and locking assembly, and locking assembly includes the locking piece of swing joint in second joint, is located in the retreat groove of first joint and is used for the drive slope of pushing locking piece in the process of inserting, and second joint is equipped with sealing ring, and when first joint is inserted with second joint, locking piece part enters the retreat groove, to lock first joint and second joint, and the retreat groove, sealing ring and drive slope are spaced apart in the axial direction, and the outer circumferential surface on the insertion end of first joint is flat cylindrical surface, and sealing ring and the outer circumferential surface on the insertion end of first joint form radial sealing contact. The utility model improves the sealing property, and guarantees the service life of fluid quick connector.

Description

Technical Field

[0001] This utility model relates to the field of fluid pipeline connection, and in particular to a fluid quick connector. Background Technology

[0002] As data centers evolve towards higher density, modularity, and intelligence, liquid cooling technology, due to its significantly higher heat dissipation efficiency compared to air cooling systems, has become the mainstream heat dissipation solution for supercomputing centers, AI computing clusters, and edge computing nodes. In this context, quick-connect fluid couplings, as key components in liquid cooling systems for refrigerant delivery, loop sealing, and rapid device insertion / removal, directly impact the system's stability and reliability. Existing technologies, such as the utility model patent CN210830941U, disclose a quick-connect coupling including a male and female connector. The male connector includes a plug, integrally formed, with a protruding rear portion, an inclined rear inner wall, a front inner wall parallel to the centerline, and a recessed front end with a beveled surface. A retaining groove is provided on the middle outer wall of the plug. The female connector includes a housing with an inclined rear inner wall and a steel ball at the front. The steel ball connects to an outer sleeve, which is fitted onto the outer wall of the housing. An outer sleeve spring is provided between the outer sleeve and the housing. The spring has an O-ring on the inner wall of the housing for contacting the recessed part at the front of the male connector to achieve a seal. However, there are several drawbacks to placing the O-ring in the recessed structure: on the one hand, the recessed area usually reduces the effective contact area of ​​the O-ring, and the O-ring is subjected to non-uniform pressure, which may cause one side of the O-ring to be over-compressed and the other side to have poor contact, which may easily lead to leakage problems under high pressure or high flow rate conditions; on the other hand, during frequent insertion and removal, the O-ring is prone to wear or fatigue due to local stress concentration, which affects its service life and sealing reliability. Utility Model Content

[0003] The purpose of this invention is to provide a quick fluid connector that solves the problems of poor sealing and short service life in the prior art, improving sealing while ensuring the service life of the quick fluid connector.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a fluid quick connector, comprising a first connector, a second connector, and a locking assembly. The locking assembly includes a locking member movably connected to the second connector, a backlash groove provided in the first connector, and a driving inclined surface for pushing the locking member during insertion. The second connector is provided with a sealing ring. When the first connector and the second connector are inserted, the locking member partially extends into the backlash groove to lock the first connector and the second connector. The backlash groove, the sealing ring, and the driving inclined surface are spaced apart axially. The outer peripheral surface of the insertion end of the first connector is a flat cylindrical surface, and the sealing ring forms a radial sealing contact with the outer peripheral surface of the insertion end of the first connector.

[0005] After adopting the above technical solution, this utility model has the following advantages: The cooperation of the driving inclined surface, the anti-reverse groove, and the locking component forms a precise mechanical locking logic. During insertion, the driving inclined surface pushes the locking component to move smoothly. After reaching the position, the locking component extends into the anti-reverse groove to achieve rigid locking, minimizing axial loosening between the first and second joints. Secondly, the sealing ring, anti-reverse groove, and driving inclined surface are spaced apart axially, and the sealing ring forms a radial sealing contact with the outer circumferential surface of the first joint. The flat cylindrical surface can form a more uniform and sufficient surface contact with the sealing ring, maximizing the sealing contact area and making the force distribution of the sealing ring more balanced under pressure. This effectively improves the sealing reliability under high pressure and high flow rate conditions and significantly reduces leakage. By avoiding the inclined structure of the driving ramp and the recessed area of ​​the anti-reverse groove, the flat cylindrical surface moves more smoothly relative to the sealing ring during the insertion and removal of the first connector. This minimizes the risk of increased local friction or stress concentration caused by structural abrupt changes, reducing wear and fatigue damage to the sealing ring and thus ensuring its service life. Furthermore, the sliding contact between the first connector and the sealing ring reduces the radial expansion force on the sealing ring, minimizing the direct axial impact of the first connector on the sealing ring and significantly reducing the risk of mechanical damage to the sealing ring due to the insertion action. Additionally, the increased sealing contact area on the outer circumference makes the radial pressure distribution more uniform, maintaining a stable seal even under high pressure or high flow rate conditions and reducing the risk of leakage.

[0006] Furthermore, the second connector is provided with a stop slope facing the drive slope, and when the first connector and the second connector are inserted, the drive slope abuts against the stop slope.

[0007] By adopting the aforementioned technical solution, firstly, the stop slope can provide a clear mechanical stop for the insertion depth of the first connector, ensuring that each insertion reaches the preset position as much as possible, avoiding shallow insertion that could cause unstable engagement between the locking element and the anti-reverse groove, and improving connection consistency. Secondly, the contact between the stop slope and the drive slope further enhances the sealing between the first connector and the second connector.

[0008] Furthermore, the second connector is provided with a positioning groove, and the sealing ring is embedded in the positioning groove.

[0009] By adopting the aforementioned technical solution, on the one hand, the positioning groove can provide a stable installation space for the sealing ring, limiting its displacement and skewness during insertion, removal, or fluid impact as much as possible, thereby avoiding sealing failure caused by the misalignment of the sealing ring and ensuring that the sealing point is always in contact with the outer circumferential surface of the first joint, thus improving sealing stability. On the other hand, the positioning groove can form a circumferential constraint on the sealing ring, reducing the risk of "extrusion" caused by excessive deformation under high pressure or high flow rate conditions. At the same time, when the first joint is frequently inserted and removed, it can reduce the interference of the relative friction between the sealing ring and the mating parts on its own position, indirectly reducing wear and extending service life. In addition, it facilitates the assembly and replacement of the sealing ring, and the standardized design of the positioning groove can also improve the consistency of sealing ring installation during the production process and reduce the fluctuation of sealing performance caused by manual assembly errors.

[0010] Furthermore, the sealing ring is an elastic sealing element. When the first connector and the second connector are inserted into each other, the insertion end of the first connector radially presses the sealing ring so that the outer peripheral surface of the sealing ring and the insertion end of the first connector are sealed.

[0011] Through the above technical solutions, the elastic seal itself has good deformation capability. When subjected to radial compression at the insertion end, it can adapt to the slight dimensional errors or surface roughness of the outer circumference, and enhance the sealing effect by fully filling the contact gap. At the same time, the pre-tightening force generated by compression can make the sealing ring and the outer circumference form a tighter and more uniform fit. Even under high pressure or fluid impact conditions, the elastic deformation can dynamically compensate for the changes in the sealing surface gap caused by pressure fluctuations, further improving the sealing reliability. In addition, the buffering characteristics of the elastic material can reduce the rigid friction between the sealing ring and the outer circumference during insertion and removal. Combined with the flat cylindrical surface structural design, it can further reduce the wear rate, ensure the service life of the sealing ring, and ensure the sealing stability during long-term use as much as possible. It is especially suitable for the harsh scenarios of high pressure and high frequency operation in liquid cooling systems.

[0012] Furthermore, the front end of the second connector is provided with a limiting step, and when the first connector and the second connector are plugged into each other, the insertion end of the first connector abuts against the limiting step.

[0013] Through the above technical solution, firstly, the limiting step can provide a clear mechanical stop for the insertion depth of the first connector, ensuring that the preset position is reached as much as possible each time it is inserted, avoiding the instability of the locking part and the anti-reverse groove due to shallow insertion, and improving the consistency of the connection.

[0014] Furthermore, the second connector also includes a connecting part for connecting to an external pipeline, the outer surface of which is provided with a barbed structure.

[0015] Through the above technical solution, the barbed structure can mechanically engage with the inner wall of the pipe through its unidirectionally inclined sharp teeth after the pipe is inserted into the connector, greatly enhancing the connection strength between the two and preventing the pipe from falling off under fluid pressure impact, vibration or external force pulling. There is no need for rotation or thread alignment operations, the assembly time is shorter, and no additional fastening parts such as clamps or nuts are required to achieve a reliable connection. This simplifies the assembly process with external pipes and improves installation efficiency.

[0016] Furthermore, the connecting part is integrally formed with the second connector or is threadedly connected.

[0017] Through the above technical solution, the one-piece molding eliminates the fitting gap between the connecting part and the second connector, minimizing the leakage risk that may occur due to the separate connection of the two. The one-piece structure can also evenly distribute the stress caused by fluid pressure, insertion and extraction force, and external vibration, minimizing the risk of breakage or loosening caused by localized stress concentration during separate connection. Moreover, the one-piece molding process is simpler, requiring no additional connecting structure, resulting in lower costs. The connecting part and the second connector are detachably connected by threads. The connecting part can be replaced with a corresponding size according to the specifications of the external pipeline, such as pipe diameter and material. For example, connectors with different barb densities and diameters can be used, or locking sleeves of different lengths and limiting precision can be replaced according to the insertion requirements, improving product compatibility and scenario adaptability.

[0018] Furthermore, the outer peripheral surface of the insertion end of the first connector is provided with a first protrusion and a second protrusion spaced axially upward, and an anti-reverse groove is formed between the first protrusion and the second protrusion. The driving inclined surface is provided on one of the first protrusion and the second protrusion.

[0019] The above technical solution allows the driving inclined surface to be directly set on one of the protrusions forming the anti-reverse groove, eliminating the need for an additional independent inclined surface structure, thus simplifying the structure.

[0020] Furthermore, the second connector includes a locking sleeve and a sliding sleeve that is slidably sleeved on the outer end face of the locking sleeve. The locking sleeve has a through hole and a locking member located in the through hole. A spring is provided between the sliding sleeve and the locking sleeve. The spring is used to reset the sliding sleeve and push the locking member inward by the sliding sleeve to engage with the anti-reverse groove.

[0021] Through the above technical solution, the spring provides a continuous restoring force to the sliding sleeve, ensuring that the sliding sleeve always pushes the locking element inward and engages with the anti-reverse groove under normal conditions, forming a stable mechanical lock. Even under vibration, impact, or fluid pressure fluctuations, it ensures a tight engagement between the locking element and the anti-reverse groove, minimizing the risk of accidental loosening of the first and second connectors. When the first connector is inserted, it compresses the sliding sleeve and spring, driving the inclined plane to push the locking element outward. After insertion, the spring drives the sliding sleeve to reset and pushes the locking element into the anti-reverse groove. The entire process requires no additional operation, achieving locking upon insertion. To unlock, simply pull or press the sliding sleeve manually to overcome the spring force, pulling out the first connector and disengaging the locking element from the anti-reverse groove, thus minimizing the jamming or over-tightening problems of traditional locking structures.

[0022] Furthermore, the locking sleeve is provided with a plurality of through holes evenly distributed along the circumference, and each through hole is provided with the locking element.

[0023] Through the above technical solution, the circumferentially evenly distributed locking elements form a multi-point mechanical engagement with the anti-reverse groove of the first joint, providing a more stable constraint force, improving the connection reliability of the first joint and the second joint, and the evenly distributed multiple locking elements can distribute the locking force to multiple contact points, reduce the load pressure of a single locking element, reduce the wear of the locking elements, and ensure their service life. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the structure of the first connector of this utility model;

[0026] Figure 2 This is a cross-sectional view of the first connector of this utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the second connector of this utility model;

[0028] Figure 4 This is a cross-sectional view of the second connector of this utility model;

[0029] Figure 5 This is a schematic diagram showing the structure of the present invention with the first connector and the second connector separated.

[0030] Figure 6 This is a schematic diagram of the sliding sleeve rearward compression spring of this utility model;

[0031] Figure 7 This is a schematic diagram of the structure of the outer peripheral surface of the present invention in contact with the steel ball;

[0032] Figure 8 This is a schematic diagram of the structure of the driving inclined surface contacting the steel ball of this utility model;

[0033] Figure 9 This is a schematic diagram of the structure of the sealing ring at the insertion end of the first connector of this utility model;

[0034] Figure 10 This is a schematic diagram of the steel ball locking groove of this utility model;

[0035] Figure 11 This is a schematic diagram of the sliding sleeve reset structure of this utility model;

[0036] In the figure, 1. First connector; 11. Driving inclined surface; 12. Anti-reverse groove; 121. Guide inclined surface; 122. Limiting surface; 13. Outer peripheral surface; 14. First protrusion; 15. Second protrusion; 2. Second connector; 21. Locking sleeve; 211. Through hole; 212. Positioning groove; 213. Limiting step; 214. Stopping step; 215. Stopping inclined surface; 22. Sliding sleeve; 221. Protrusion; 23. Sealing ring; 24. Steel ball; 25. Spring; 26. Connecting part; 261. Barbed structure; 27. Snap ring. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0038] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein.

[0039] It should be understood that in the various embodiments of this utility model, the number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this utility model.

[0040] It should be understood that in this invention, "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product or device.

[0041] It should be understood that in this utility model, "multiple" refers to two or more. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, X and / or Y can represent: X alone, X and Y simultaneously, or Y alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "Contains X, Y, and Z", "Contains X, Y, and Z" means that all three X, Y, and Z are contained; "Contains X, Y, or Z" means that one of X, Y, and Z is contained; "Contains X, Y, and / or Z" means that any one, two, or three of X, Y, and Z are contained.

[0042] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be selected to be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.

[0043] like Figures 1 to 11 As shown, this utility model provides a fluid quick connector, including a first connector 1, a second connector 2, and a locking assembly. The locking assembly includes a locking member movably connected to the second connector 2, a backstop groove 12 provided in the first connector 1, and a driving inclined surface 11 for pushing the locking member during insertion. The second connector 2 is provided with a sealing ring 23. When the first connector 1 and the second connector 2 are inserted, the locking member partially extends into the backstop groove 12 to lock the first connector 1 and the second connector 2. The backstop groove 12, the sealing ring 23, and the driving inclined surface 11 are spaced apart axially. The outer peripheral surface 13 on the insertion end of the first connector 1 is a flat cylindrical surface, and the sealing ring 23 forms a radial sealing contact with the outer peripheral surface 13 on the insertion end of the first connector 1.

[0044] The drive ramp 11, the anti-reverse groove 12, and the locking element work together to form a precise mechanical locking logic. During insertion, the drive ramp 11 pushes the locking element to move smoothly. After reaching the desired position, the locking element extends into the anti-reverse groove 12 to achieve rigid locking, minimizing axial loosening between the first connector 1 and the second connector 2. Furthermore, the sealing ring 23 is axially spaced from the anti-reverse groove 12 and the drive ramp 11. The sealing ring 23 forms a radial sealing contact with the outer circumferential surface 13 of the first connector 1. The flat cylindrical surface allows for more uniform and sufficient surface contact with the sealing ring 23, maximizing the sealing contact area and ensuring a more balanced force distribution on the sealing ring 23 under pressure. This effectively improves sealing reliability under high pressure and high flow rate conditions, significantly reduces leakage risk, and avoids the need for the drive ramp. The inclined structure of 11 and the recessed area of ​​the anti-reverse groove 12 ensure smoother relative movement between the flat cylindrical surface and the sealing ring 23 during the insertion and removal of the first connector 1. This minimizes the risk of increased local friction or stress concentration caused by structural abrupt changes, reducing wear and fatigue damage to the sealing ring 23 and thus ensuring its service life. Furthermore, the sliding contact between the first connector 1 and the sealing ring 23 reduces the radial expansion force on the sealing ring 23, minimizing the axial impact of the first connector 1 on the sealing ring 23. This significantly reduces the risk of mechanical damage to the sealing ring 23 due to the insertion action. Additionally, the outer peripheral surface 13 increases the sealing contact area, resulting in a more uniform radial pressure distribution. This ensures stable sealing even under high pressure or high flow rate conditions, reducing the risk of leakage.

[0045] The second connector 2 includes a locking sleeve 21 and a sliding sleeve 22 that is slidably sleeved on the outer end face of the locking sleeve 21. The locking sleeve 21 has a through hole 211 and a locking member located in the through hole 211. A spring 25 is provided between the sliding sleeve 22 and the locking sleeve 21. The spring 25 is used to reset the sliding sleeve 22 and push the locking member inward by the sliding sleeve 22 to engage with the anti-return groove 12, forming a stable mechanical lock. Even under vibration, impact or fluid pressure fluctuation, it can ensure that the locking member and the anti-return groove 12 are tightly engaged, and avoid the first connector 1 and the second connector 2 from accidentally loosening.

[0046] It should be noted that the locking sleeve 21 has a retaining ring 27 at its rear end and a stop step 214 at its front end. The sliding sleeve 22 has a protrusion 221. The two ends of the spring 25 abut against the stop step 214 and the protrusion 221 respectively, and the other side of the protrusion 221 abuts against the retaining ring 27 to prevent the sliding sleeve 22 from disengaging from the locking sleeve 21. The locking element can be a steel ball 24.

[0047] Since the sealing ring 23 is easily moved during the insertion and removal of the first connector 1, thus affecting the sealing effect, the second connector 2 is provided with a positioning groove 212 in this application. The positioning groove 212 is specifically located on the locking sleeve 21, and the sealing ring 23 is embedded in the positioning groove 212. On the one hand, the positioning groove 212 provides a stable installation space for the sealing ring 23, limiting its displacement and skewness during insertion, removal, or fluid impact, thereby minimizing sealing failure caused by the misalignment of the sealing ring 23 and ensuring that the sealing point is always precisely aligned with the flat cylindrical surface of the first connector 1, thus improving sealing stability. On the other hand, the positioning groove 212 provides circumferential constraint on the sealing ring 23, reducing the risk of "extrusion" due to excessive deformation under high pressure or high flow rate conditions. Simultaneously, during frequent insertion and removal of the first connector 1, it reduces the interference of relative friction between the sealing ring 23 and the mating components on its own position, indirectly reducing wear and extending service life. Furthermore, facilitating the assembly and replacement of the sealing ring 23, the standardized design of the positioning groove 212 also improves the consistency of sealing ring 23 installation during production, reducing fluctuations in sealing performance caused by manual assembly errors.

[0048] Among them, the sealing ring 23 is an elastic seal. The elastic seal itself has good deformation capability. When the first connector 1 and the second connector 2 are inserted into each other, the insertion end of the first connector 1 radially compresses the sealing ring 23, which enhances the sealing effect by fully filling the contact gap, so that the sealing ring 23 and the outer peripheral surface 13 of the insertion end of the first connector 1 are sealed. At the same time, the pre-tightening force generated by the compression can make the sealing ring 23 and the outer peripheral surface 13 form a tighter and more uniform fit. Even under high pressure or fluid impact conditions, the elastic deformation can dynamically compensate for the change in the sealing surface gap caused by pressure fluctuations, further improving the sealing reliability. In addition, the buffering characteristics of the elastic material can reduce the rigid friction between the sealing ring 23 and the outer peripheral surface 13 during the insertion and removal process. Combined with the flat cylindrical surface structure design, it can further reduce the wear rate, ensure the service life of the sealing ring 23, and ensure the sealing stability during long-term use as much as possible. It is especially suitable for the harsh scenarios of high pressure and high frequency operation in liquid cooling systems.

[0049] Since the interiors of the first connector 1 and the second connector 2 cannot be directly observed, it is impossible for the staff to know whether they are properly inserted. Therefore, in this application, the second connector 2 is provided with a stop slope 215 facing the drive slope 11. When the first connector 1 and the second connector 2 are inserted, the drive slope 11 abuts against the stop slope 215. The stop slope 215 can provide a clear mechanical stop for the insertion depth of the first connector 1, ensuring that each insertion reaches the preset position as much as possible, avoiding shallow insertion that causes the locking part and the anti-reverse groove 12 to be unstable, and improving the connection consistency. Secondly, the abutment between the stop slope 215 and the drive slope 11 further improves the sealing between the first connector 1 and the second connector 2.

[0050] Furthermore, the front end of the second connector 2 is provided with a limiting step 213, which is specifically located at the front end of the locking sleeve 21. When the first connector 1 and the second connector 2 are inserted into each other, the insertion end of the first connector 1 abuts against the limiting step 213. The limiting step 213 can provide a more precise mechanical stop for the insertion depth of the first connector 1, ensuring that the preset position is reached as much as possible each time it is inserted, and avoiding shallow insertion that could cause the steel ball 24 to be unstable in engagement with the anti-reverse groove 12, thus improving the consistency of the connection. The limiting step 213 and the stop slope 215 serve a dual limiting function.

[0051] Understandably, in other embodiments, only a stop ramp or a limiting step may be provided to serve as a limit while also simplifying the structure.

[0052] It should be noted that the front end of the anti-reverse groove 12 is provided with a guide slope 121 to facilitate the entry or exit of the steel ball 24. Since the insertion end of the first connector 1 has already achieved forward stopping by abutting the stop slope 215, the rear end of the anti-reverse groove 12 is a limiting surface 122. When the first connector 1 is subjected to a backward pulling force, such as fluid impact or displacement caused by vibration, the steel ball 24 will form rigid contact with the vertical limiting surface 122. The vertical structure can directly bear the axial force, preventing the steel ball 24 from slipping out of the anti-reverse groove 12 due to force and causing anti-reverse failure. The axial position of the first connector 1 is locked as much as possible through bidirectional constraint, ensuring connection stability even in high-pressure fluid impact or severe vibration environments.

[0053] The limiting surface 122 can be a vertical surface or an inclined surface. The user can select the corresponding shape of the limiting surface 122 based on the ease of connection between the first connector 1 and the second connector 2 and the limiting effect on the steel ball 24.

[0054] In this embodiment, the outer peripheral surface 13 of the insertion end of the first connector 1 is provided with a first protrusion 14 and a second protrusion 15 spaced upwards, and a backstop groove 12 is formed between the first protrusion 14 and the second protrusion 15. The driving inclined surface 11 is provided on one of the first protrusion 14 and the second protrusion 15. There is no need to provide an additional independent inclined surface structure, and the structure is simpler. In this embodiment, the driving inclined surface 11 is provided on the second protrusion 15, and the guiding inclined surface 121 is provided on the other end of the second protrusion 15.

[0055] To improve the connection reliability between the first connector 1 and the second connector 2, the locking sleeve 21 is provided with multiple through holes 211 evenly distributed circumferentially, each through hole 211 containing a steel ball 24. The evenly distributed steel balls 24 form a multi-point mechanical engagement with the anti-reverse groove 12 of the first connector 1, providing a more stable constraint force and improving the connection reliability between the first connector 1 and the second connector 2. The evenly distributed multiple steel balls 24 can distribute the locking force to multiple contact points, reducing the load-bearing pressure of a single steel ball 24, reducing wear on the steel ball 24 or the connector surface, and ensuring its service life.

[0056] It should be noted that this application has six through holes 211, and correspondingly six steel balls 24, forming a six-point mechanical engagement.

[0057] To facilitate connection with external pipelines, the second connector 2 also includes a connecting part 26 for connecting with external pipelines. The outer surface of the connecting part 26 is provided with a barb structure 261. After the external pipeline is fitted into the connecting part 26, the barb structure 261 can mechanically engage with the inner wall of the external pipeline through its unidirectionally inclined sharp teeth, greatly enhancing the connection strength between the two and preventing the external pipeline from falling off under fluid pressure impact, vibration, or external force pulling. There is no need for operations such as rotation or thread alignment, the assembly time is shorter, and no additional fastening parts such as clamps or nuts are required to achieve a reliable connection, simplifying the assembly process with external pipelines and improving installation efficiency.

[0058] In this example, the connecting part 26 and the locking sleeve 21 are integrally formed. The integral forming eliminates the fitting gap between the connecting part 26 and the locking sleeve 21, and avoids the leakage risk that may be caused by the separate connection of the two. The integral structure can also evenly distribute the fluid pressure, insertion and extraction force and stress caused by external vibration, and avoid the breakage or loosening caused by local stress concentration when the two are connected separately. Moreover, the integral forming process is simple and does not require additional connecting structures, resulting in lower cost.

[0059] Furthermore, both the insertion end and the connecting portion 26 of the first connector 1 are hollow, and the inner diameter of the insertion end of the first connector 1 is larger than the inner diameter of the connecting portion 26. The insertion end serves as the insertion channel with the second connector 2, and the larger inner diameter can reduce the local flow velocity when the fluid enters the connecting portion 26, avoiding turbulence and energy loss caused by sudden contraction of the channel.

[0060] During the insertion process of the first connector 1 and the second connector 2:

[0061] like Figure 5As shown, the first connector 1 is in the insertion state, with the driving inclined surface 11 of its insertion end facing forward, the anti-reverse groove 12 located behind the driving inclined surface 11, and the flat cylindrical outer circumferential surface 13 between the two kept clean; in the second connector 2, the sliding sleeve 22 is in the front end position under the elastic force of the spring 25, the steel ball 24 is constrained by the inner wall of the sliding sleeve 22, and is partially embedded in the through hole 211 of the locking sleeve 21 (protruding inward), and the sealing ring 23 is embedded in the positioning groove 212 of the locking sleeve 21, and is in a naturally relaxed state;

[0062] like Figure 6 As shown, pushing the sliding sleeve 22 backward compresses the spring 25, and the inner wall of the sliding sleeve 22 disengages from the steel ball 24, releasing the radial constraint on the steel ball 24 to a certain extent. The steel ball 24 will not completely come out of the through hole 211 on the locking sleeve 21.

[0063] Then, as Figure 7 As shown, the insertion end of the first connector 1 is aligned with the port of the locking sleeve 21 of the second connector 2 and pushed, and the outer peripheral surface 13 of the front end of the insertion end first contacts the steel ball 24.

[0064] like Figure 8 As shown, as the insertion depth increases, the driving inclined surface 11 contacts the steel ball 24 and squeezes the steel ball 24 by the inclined angle, forcing the steel ball 24 to move radially outward along the through hole 211.

[0065] like Figure 9 As shown, the first connector 1 continues to be inserted, the steel ball 24 contacts the outer periphery of the second protrusion 15, the steel ball 24 disengages from the through hole 211 to a certain extent, no longer obstructing the insertion of the first connector 1, the insertion end of the first connector 1 contacts the sealing ring 23 in the positioning groove 212 and squeezes the sealing ring 23, causing it to deform and fit tightly between the outer peripheral surface 13 and the inner wall of the locking sleeve 21, forming a preliminary seal.

[0066] like Figure 10 As shown, when the first connector 1 is inserted into place, the driving inclined surface 11 abuts against the stopping inclined surface 215, at which point the anti-reverse groove 12 is precisely aligned with the position of the steel ball 24. Figure 11 As shown, the sliding sleeve 22 returns to its original position under the elastic force of the spring 25, and the steel ball 24 moves inward under the constraint of the inner wall of the sliding sleeve 22, locking into the anti-reverse groove 12 to form a mechanical self-locking, thus completing the connection. At this time, the sealing ring 23 maintains a stable seal under continuous compression, and the fluid can be smoothly transmitted through the hollow channels of the first connector 1 and the second connector 2.

[0067] The separation process of the first connector 1 and the second connector 2:

[0068] like Figure 10As shown, manually press the sliding sleeve 22 of the second connector 2 forward to make it move forward against the elastic force of the spring 25. The inner wall of the sliding sleeve 22 disengages from the steel ball 24, releasing the radial constraint on the steel ball 24 to a certain extent. The steel ball 24 will not completely come out of the through hole 211 on the locking sleeve 21.

[0069] like Figure 9 As shown, when the first connector 1 is pulled outward, the side wall of its anti-reverse groove 12 will squeeze the steel ball 24, forcing the steel ball 24 to move outward along the through hole 211 and disengage from the anti-reverse groove 12. At this time, the steel ball 24 is completely retracted into the through hole 211, releasing the self-locking state.

[0070] like Figure 8 and Figure 7 As shown, the first connector 1 continues to be pulled outward, and the outer peripheral surface 13 gradually separates from the sealing ring 23. The sealing ring 23 returns to its original shape under its own elasticity.

[0071] like Figure 6 As shown, as the first connector 1 is completely disengaged, the driving ramp 11 separates from the steel ball 24, and the steel ball 24 loses its support.

[0072] like Figure 5 As shown, when the sliding sleeve 22 is released, it returns to its original position under the elastic force of the spring 25, and the steel ball 24 moves inward again, returning to its initial standby state, waiting for the next connection.

[0073] Understandably, in other embodiments, the connecting part is threadedly connected to the locking sleeve, achieving a detachable connection. The connecting part can be replaced with a corresponding size based on the specifications of the external pipeline, such as pipe diameter and material. For example, connectors with different barb densities and diameters can be used. Alternatively, locking sleeves of different lengths and limiting accuracies can be replaced according to insertion requirements, improving product compatibility and scenario adaptability. Understandably, in other embodiments, the inner diameter of the insertion end of the first connector may not be greater than the inner diameter of the connecting part. Since the connecting part and the locking sleeve can also be threadedly connected, connecting parts with different inner diameters can be selected as needed.

[0074] In addition to the preferred embodiments described above, there are other embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection claimed by this utility model.

Claims

1. A quick fluid coupling, comprising a first coupling, a second coupling, and a locking assembly, the locking assembly comprising a locking member movably connected to the second coupling, a backstop groove disposed on the first coupling, and a driving ramp for pushing the locking member during insertion, the second coupling being provided with a sealing ring, characterized in that, When the first connector and the second connector are inserted, the locking part extends into the anti-reverse groove to lock the first connector and the second connector. The anti-reverse groove, the sealing ring and the driving inclined surface are spaced apart in the axial direction. The outer peripheral surface of the insertion end of the first connector is a flat cylindrical surface. The sealing ring and the outer peripheral surface of the insertion end of the first connector form a radial sealing contact.

2. The fluid quick connector according to claim 1, characterized in that, The second connector has a stop slope facing the drive slope. When the first connector and the second connector are plugged in, the drive slope abuts against the stop slope.

3. The fluid quick connector according to claim 1, characterized in that, The second connector is provided with a positioning groove, and the sealing ring is embedded in the positioning groove.

4. The fluid quick connector according to claim 1, characterized in that, The sealing ring is an elastic sealing element. When the first connector and the second connector are inserted into each other, the insertion end of the first connector radially presses the sealing ring so that the outer peripheral surface of the sealing ring and the insertion end of the first connector are sealed.

5. The fluid quick connector according to claim 1, characterized in that, The front end of the second connector is provided with a limiting step, and when the first connector and the second connector are plugged into each other, the insertion end of the first connector abuts against the limiting step.

6. The fluid quick connector according to claim 1, characterized in that, The second connector also includes a connection part for connecting to an external pipeline, the outer surface of which is provided with a barb structure.

7. The fluid quick connector according to claim 6, characterized in that, The connecting part is integrally formed with the second connector or is threadedly connected.

8. The fluid quick connector according to claim 1, characterized in that, The outer peripheral surface of the insertion end of the first connector is provided with a first protrusion and a second protrusion spaced axially upward, and an anti-reverse groove is formed between the first protrusion and the second protrusion. The driving inclined surface is provided on one of the first protrusion and the second protrusion.

9. The fluid quick connector according to claim 1, characterized in that, The second connector includes a locking sleeve and a sliding sleeve that is slidably sleeved on the outer end face of the locking sleeve. The locking sleeve has a through hole and a locking member located in the through hole. A spring is provided between the sliding sleeve and the locking sleeve. The spring is used to reset the sliding sleeve and push the locking member inward by the sliding sleeve to engage with the anti-reverse groove.

10. The fluid quick connector according to claim 9, characterized in that, The locking sleeve has multiple through holes evenly distributed along the circumference, and each through hole is provided with the locking element.

Images