Fluid connector with pre-unlocking sliding sleeve
Patent Information
- Application Number
- CN202522243202.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-23
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-10-23
AI Technical Summary
[0005]本实用新型的目的是提供一种带预解锁滑套的流体连接器，以解决现有技术中在对液体的流量进行调节过程中，静态密封无法适应动态调节导致可能会出现液体泄漏等问题
[0020]与现有技术相比，本实用新型提供的一种带预解锁滑套的流体连接器，通过设置的母端腔体，在母端腔体内设置母端阀芯，母端腔体内设置滑动连接的滑套，当公端腔体插入外壳内部后，公端腔体首先穿过第三密封件，形成第一道密封，公端腔体继续向前推进，公端阀芯被母端阀杆推到公端腔体内，母端阀芯被公端腔体推入母端腔体内，在此过程中母端阀芯逐渐退出第一密封件与第二密封件，此时第三密封件代替第一密封件作为腔体内外部的密封，完成以上动作后公端继续向母端腔体内部运动，从而在调节液体流量过程中实现密封的交接，避免了液体泄漏，提高了连接器的整体密封。
Smart Images
Figure CN224836638U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fluid transport technology, specifically to a fluid connector with a pre-unlocking sliding sleeve. Background Technology
[0002] In industrial fields such as hydraulic transmission, lubrication systems, or chemical processes, there are working conditions that require precise control of fluid flow. To meet this need, various fluid connectors with flow regulation functions have appeared on the market.
[0003] These types of connectors typically have a rotatable or axially movable adjusting sleeve on the outside of their female connector. By rotating or sliding the adjusting sleeve, the operator drives a valve core or throttling element inside to change its position, thereby narrowing or widening the flow channel diameter and achieving stepless or graded regulation of the flow rate.
[0004] However, in practical applications, the aforementioned connectors with adjustment functions require the adjusting sleeve to rotate or slide relative to the connector body to achieve the adjustment function. Therefore, a clearance inevitably exists between them. When high-pressure fluid flows inside the connector, the fluid tends to leak outward through this movable clearance under pressure. Especially during flow regulation, the movement of the sleeve may temporarily disrupt the contact state of the seal, resulting in brief jetting or continuous leakage of high-pressure fluid. Existing sealing solutions (such as using O-rings) perform well in static sealing, but they are difficult to effectively deal with this gap leakage problem caused by dynamic adjustment. Utility Model Content
[0005] The purpose of this invention is to provide a fluid connector with a pre-unlocking sliding sleeve to solve the problem in the prior art where static sealing cannot adapt to dynamic adjustment during the process of regulating the flow rate of liquid, which may lead to liquid leakage.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a fluid connector with a pre-unlocking sliding sleeve, comprising a housing, wherein a female valve seat with movable connection is provided inside one end of the housing;
[0007] The female end cavity is detachably installed inside the female end valve seat;
[0008] The female valve core is movably installed inside the female cavity.
[0009] A female valve stem is movably mounted inside the female valve core and extends toward the female valve seat. A return spring is provided between the annular protrusion on the female valve stem and the female valve core.
[0010] A sliding sleeve is slidably installed inside the female end cavity. The inner wall of the sliding sleeve near the female end valve seat dynamically fits against the outer wall of the female end valve core. The outer wall of the sliding sleeve and the outer wall of the female end cavity are provided with a pre-locking mechanism.
[0011] The male end cavity is movably installed in the female end cavity. The outer wall of the male end cavity is dynamically fitted with the inner wall of the sliding sleeve. The male end cavity is provided with a male end valve core.
[0012] The first sealing element is symmetrically arranged inside the female end cavity. The two first sealing elements are dynamically fitted to the outer wall of the female end valve core and the sliding sleeve, respectively. A second sealing element is provided between the female end valve stem and the female end valve core.
[0013] The third sealing element is installed in the inner wall of the sliding sleeve. The third sealing element dynamically fits against the outer wall of the male end cavity. When the male end cavity is inserted into the sliding sleeve and continuously pushed forward, the sealing effect between the first sealing element and the second sealing element and the female end valve core is gradually released. At the same time, the third sealing element forms a seal with the outer wall of the male end cavity to replace the first sealing element and achieve isolation between the inside and outside of the cavity.
[0014] Furthermore, the outer wall of the female valve core is provided with a limiting part 1. When the female valve core moves away from the female valve seat to its maximum stroke, the limiting part 1 abuts against the abutting part 1 formed on the inner wall of the female cavity.
[0015] Furthermore, an annular mating portion is provided on the outer wall of the end of the female valve core away from the female valve seat, and the inner wall of the sliding sleeve near the female valve core abuts against the annular mating portion, and the first sealing member is in close contact with the outer wall of the sliding sleeve.
[0016] Furthermore, a limiting part two is provided on the outer wall of the sliding sleeve. After the flow rate in the male end cavity reaches the rated value, the limiting part two on the sliding sleeve abuts against the abutting part two formed on the inner wall of the female end cavity.
[0017] Furthermore, the pre-locking mechanism includes a first steel ball, a second steel ball, and an annular boss. There are multiple first steel balls arranged in an annular array and movably embedded in the holes of the female end cavity wall. The outer wall of the sliding sleeve is provided with an annular sliding groove. The inner part of the first steel ball is located in the sliding groove and can slide along it, while the outer part is in contact with the inner wall of the outer shell.
[0018] Furthermore, there are multiple steel balls 2, which are distributed in a ring on the female end cavity and located on the side of the steel ball 1 away from the female end valve core. The inner wall of the outer shell is provided with a limiting part 3 to restrict the movement of the steel ball 2. The inner wall of the sliding sleeve is provided with an abutting part 3 on the side near the male end cavity. The annular boss is installed on the outer wall of the male end cavity. When the connection is completed and in the locked state, the front end of the annular boss abuts against the abutting part 3, and the steel ball 2 is stuck into the inclined surface of the rear end of the annular boss to achieve locking.
[0019] Furthermore, a fourth sealing element is embedded in the outer wall of the male valve core, and the fourth sealing element dynamically fits against the inner wall of the male cavity.
[0020] Compared with the prior art, the fluid connector with a pre-unlocking sliding sleeve provided by this utility model has a female end cavity with a female end valve core and a sliding sleeve. When the male end cavity is inserted into the outer shell, the male end cavity first passes through the third sealing element to form the first seal. As the male end cavity continues to move forward, the male end valve core is pushed into the male end cavity by the female end valve stem, and the female end valve core is pushed into the female end cavity by the male end cavity. During this process, the female end valve core gradually exits the first and second sealing elements. At this time, the third sealing element replaces the first sealing element as the seal between the inside and outside of the cavity. After completing the above actions, the male end continues to move into the female end cavity, thereby achieving the handover of the seal during the adjustment of the liquid flow rate, avoiding liquid leakage and improving the overall sealing of the connector. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.
[0022] Figure 1 A cross-sectional view of the overall internal structure of a fluid connector with a pre-unlocking sleeve provided in an embodiment of this utility model;
[0023] Figure 2 A schematic diagram of the overall external structure provided for an embodiment of this utility model;
[0024] Figure 3 A schematic diagram of the maximum stroke state of the male end cavity provided in an embodiment of this utility model;
[0025] Figure 4 A cross-sectional view of the internal structure of the male end cavity provided in an embodiment of this utility model;
[0026] Figure 5This is a schematic diagram of the structure of the female end cavity and steel ball one and steel ball two components provided in an embodiment of the present utility model;
[0027] Figure 6 A cross-sectional view of the internal structure of the female valve core provided in an embodiment of this utility model;
[0028] Figure 7 A cross-sectional view of the internal structure of the sliding sleeve provided in an embodiment of this utility model;
[0029] Figure 8 A cross-sectional view of the internal structure of the female end cavity provided in an embodiment of this utility model.
[0030] Explanation of reference numerals in the attached figures:
[0031] 1. Outer shell; 2. Female valve seat; 3. Female cavity; 4. Female valve core; 5. Female valve stem; 6. Return spring; 7. Sliding sleeve; 8. Male cavity; 9. Male valve core; 10. First seal; 11. Second seal; 12. Third seal; 13. Limiting part one; 14. Abutting part one; 15. Annular mating part; 16. Limiting part two; 17. Abutting part two; 18. Steel ball one; 19. Steel ball two; 20. Annular boss; 21. Sliding groove; 22. Limiting part three; 23. Abutting part three; 24. Fourth seal. Detailed Implementation
[0032] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.
[0033] As attached Figure 1 To be continued Figure 8 As shown:
[0034] Example:
[0035] This utility model provides a fluid connector with a pre-unlocking sliding sleeve, including a housing 1, and a female valve seat 2 that is movably connected inside one end of the housing 1;
[0036] The female end cavity 3 is detachably installed inside the female end valve seat 2;
[0037] The female valve core 4 is movably installed inside the female cavity 3;
[0038] The female valve stem 5 is movably installed inside the female valve core 4 and extends toward the female valve seat 2. A return spring 6 is provided between the annular protrusion on the female valve stem 5 and the female valve core 4.
[0039] The sliding sleeve 7 is slidably installed inside the female end cavity 3. The inner wall of the sliding sleeve 7 near the female end valve seat 2 is dynamically in contact with the outer wall of the female end valve core 4. The outer wall of the sliding sleeve 7 and the outer wall of the female end cavity 3 are provided with a pre-locking mechanism.
[0040] The male end cavity 8 is movably installed inside the female end cavity 3. The outer wall of the male end cavity 8 is dynamically fitted with the inner wall of the sliding sleeve 7. The male end cavity 8 is provided with a male end valve core 9.
[0041] The first sealing element 10 is symmetrically arranged inside the female end cavity 3. The two first sealing elements 10 are dynamically fitted to the outer walls of the female end valve core 4 and the sliding sleeve 7, respectively. A second sealing element 11 is provided between the female end valve stem 5 and the female end valve core 4.
[0042] The third sealing element 12 is installed in the inner wall of the sliding sleeve 7. The third sealing element 12 dynamically fits the outer wall of the male end cavity 8. When the male end cavity 8 is inserted into the sliding sleeve 7 and continues to advance, the sealing effect between the first sealing element 10 and the second sealing element 11 and the female end valve core 4 is gradually released. At the same time, the third sealing element 12 forms a seal with the outer wall of the male end cavity 8 to replace the first sealing element 10 and achieve isolation between the inside and outside of the cavity.
[0043] It should be noted that: through the female end cavity 3, a female end valve core 4 is set inside the female end cavity 3, and a sliding sleeve 7 is set inside the female end cavity 3. When the male end cavity 8 is inserted into the outer shell 1, the male end cavity 8 first passes through the third sealing element 12 to form the first seal. The male end cavity 8 continues to move forward, and the male end valve core 9 is pushed into the male end cavity 8 by the female end valve stem 5. The female end valve core 4 is pushed into the female end cavity 3 by the male end cavity 8. During this process, the female end valve core 4 gradually exits the first sealing element 10 and the second sealing element 11. At this time, the third sealing element 12 replaces the first sealing element 10 as the seal inside and outside the cavity. After completing the above actions, the male end continues to move into the female end cavity 3, thereby realizing the handover of the seal during the adjustment of liquid flow, avoiding liquid leakage, and improving the overall sealing of the connector.
[0044] The first seal 10, the second seal 11, the third seal 12, and the fourth seal 24 are all O-rings made of rubber material resistant to fluid corrosion.
[0045] In this embodiment, the outer wall of the female valve core 4 is provided with a limiting part 13. When the female valve core 4 moves away from the female valve seat 2 to the maximum stroke, the limiting part 13 abuts against the abutting part 14 formed on the inner wall of the female cavity 3.
[0046] It should be noted that the cooperation between the limiting part 13 and the abutting part 14 provides a precise mechanical limit for the backward movement of the female valve core 4 within the female cavity 3. This structure has two important functions: First, it prevents the female valve core 4 from excessively retracting under fluid pressure or the action of the return spring 6, thereby disengaging from its normal working position and ensuring the stability and service life of the component. Second, it defines the fully open position of the female valve core 4, ensuring that the fluid channel has a sufficiently large flow area in the connected state, effectively reducing flow resistance and ensuring the passage of the rated flow rate.
[0047] In this embodiment: the outer wall of the female valve core 4 away from the female valve seat 2 is provided with an annular mating part 15, the inner wall of the sliding sleeve 7 near the female valve core 4 abuts against the annular mating part 15, and the first sealing member 10 fits against the outer wall of the sliding sleeve 7.
[0048] It should be noted that the annular mating part 15 constitutes the power transmission interface between the sliding sleeve 7 and the female valve core 4. In the initial stage of male insertion, the male end cavity 8 abuts against the annular mating part 15 through the inner wall of the sliding sleeve 7, pushing the female valve core 4 and the sliding sleeve 7 as a whole to retreat synchronously, thereby achieving a smooth pre-unlocking action. At the same time, the first sealing element 10 set here is responsible for sealing the annular gap between the sliding sleeve 7 and the female end cavity 3 in the initial state. This design achieves the unity of effective force transmission and initial static sealing, with a compact structure and reliable operation.
[0049] In this embodiment: a limiting part 2 16 is provided on the outer wall of the sliding sleeve 7. After the flow rate in the male end cavity 8 reaches the rated value, the limiting part 2 16 on the sliding sleeve 7 abuts against the abutting part 2 17 formed on the inner wall of the female end cavity 3.
[0050] It should be noted that the cooperation between the limiting part 16 and the abutting part 17 is used to limit the sliding stroke of the sliding sleeve 7 within the female end cavity 3. When the male end cavity 8 is inserted to a predetermined depth and the fluid flow rate reaches the rated value designed by the system, the sliding sleeve 7 moves to this limiting point. This limiting function ensures that: 1. the sliding sleeve 7 will not retract excessively and affect the normal operation of other components; 2. the annular boss 20 on the male end cavity 8 can accurately reach the predetermined position for locking with the steel ball 19, providing accurate spatial positioning for subsequent locking actions and ensuring the stability and consistency of the connector's locking state.
[0051] In this embodiment, the pre-locking mechanism includes steel ball 18, steel ball 19 and an annular boss 20. There are multiple steel balls 18, which are arranged in an annular array and are movably embedded in the hole in the wall of the female end cavity 3. The outer wall of the sliding sleeve 7 is provided with an annular sliding groove 21. The inner part of the steel ball 18 is located in the sliding groove 21 and can slide along it, while the outer part is in contact with the inner wall of the outer shell 1.
[0052] It should be noted that the engagement between the steel ball 18 and the sliding groove 21 on the sliding sleeve 7 is crucial for achieving the pre-unlocking function. In the unconnected state, the steel ball 18 is constrained radially inward by the inner wall of the outer shell 1, thus locking the sliding sleeve 7 and preventing it from moving; the connector is in a locked, closed state. When the male end is inserted and a pushing force is applied, the male end cavity 8 first overcomes the resistance, pushing the sliding sleeve 7 to move its sliding groove 21 relative to the steel ball 18. When the deep groove portion of the sliding groove 21 moves to the position of the steel ball 18, it provides radial movement space for the steel ball 18, releasing the lock on the sliding sleeve 7, and the pre-unlocking is completed. This locking method utilizing steel balls and grooves is simple in structure, sensitive in action, and highly reliable.
[0053] In this embodiment: there are multiple steel balls 19, which are distributed in a ring on the female end cavity 3 and located on the side of steel ball 18 away from the female end valve core 4. The inner wall of the outer shell 1 is provided with a limiting part 22 to restrict the movement of steel ball 19. The inner wall of the sliding sleeve 7 is provided with an abutting part 23 on the side near the male end cavity 8. The annular boss 20 is installed on the outer wall of the male end cavity 8. When the connection is completed and in the locked state, the front end of the annular boss 20 abuts against the abutting part 23, and the steel ball 19 is stuck into the inclined surface of the rear end of the annular boss 20 to achieve locking.
[0054] It should be noted that this section describes the final locking mechanism after the connector is fully connected. When the male end cavity 8 is pushed into place, its annular boss 20 moves precisely to the position of the steel ball 19. At this time, under the constraint of the limiting part 22, the steel ball 19 is squeezed and locked between the inclined surface of the rear end of the annular boss 20 and the inner wall of the outer shell 1, forming a radial lock. At the same time, the front end of the annular boss 20 abuts against the abutting part 23 of the sliding sleeve 7, bearing the axial thrust. This radial locking achieved by the steel ball 19, combined with the axial abutment of the boss, forms a solid mechanical interlock, effectively preventing the male end cavity 8 from accidentally dislodging under internal fluid pressure or external tension, ensuring the in-service safety and stability of the connection.
[0055] In this embodiment, a fourth sealing element 24 is embedded in the outer wall of the male valve core 9, and the fourth sealing element 24 is dynamically fitted to the inner wall of the male cavity 8.
[0056] It should be noted that the fourth seal 24 is used to seal the gap between the male valve core 9 and the inner wall of the male cavity 8. Its "dynamic fit" means that regardless of whether the male valve core 9 is in the closed (pushed to the bottom of the male cavity 8) or open (pushed back by the female valve stem 5) state, this seal can always maintain an effective seal. This ensures that the fluid inside the male end will not leak when the male end is alone or when it is disconnected from the female end, realizing the self-sealing function of the male end side and improving the sealing integrity of the entire system.
[0057] The working process of this utility model is as follows:
[0058] Initial state: Under the action of the return spring 6, the female valve core 4 and the female valve stem 5 are in the front position, closing the fluid passage. The sliding sleeve 7 is stuck by the steel ball 18 and is in the pre-locked position.
[0059] Connection and pre-unlocking stage: The male end cavity 8 is inserted into the outer shell 1. Its end first contacts the sliding sleeve 7 and pushes it to move backward against the resistance. The sliding sleeve 7 drives the female end valve core 4 to move backward together through the annular mating part 15 (i.e., pre-unlocking). At this time, the female end valve stem 5 begins to push open the male end valve core 9. The sliding sleeve 7 moves backward until the deep groove part of its sliding groove 21 is aligned with the steel ball 18. The steel ball 18 moves radially outward to release the lock on the sliding sleeve 7.
[0060] During the sealing and flow regulation stage: After pre-unlocking, the male end cavity 8 continues to penetrate deeper, and its outer wall forms a reliable seal with the third seal 12 inside the sliding sleeve 7. Simultaneously, as the female end valve core 4 continues to move backward relative to the sliding sleeve 7, it gradually disengages from contact with the first seal 10 and the second seal 11, and the sealing function is completely taken over by the third seal 12. The insertion depth of the male end cavity 8 determines the valve core opening and the flow channel size, thereby achieving flow regulation.
[0061] Final locking stage: When the male end cavity 8 reaches the predetermined position (flow rate reaches the rated value), the annular boss 20 on it passes over the steel ball 19. Under the action of spring force or the inclined surface of the inner wall of the outer shell 1, the steel ball 19 is engaged with the inclined surface at the rear end of the annular boss 20, achieving radial locking. The front end of the annular boss 20 abuts against the abutting part 23 of the sliding sleeve 7, completing axial positioning, and the connector is in a stable working state.
[0062] Disconnection process: Pulling the male end outward causes the inclined surface of the annular boss 20 to force the steel ball 19 to retract radially inward, releasing the lock. Under the action of the return spring 6, each component resets in sequence, the sealed state is reversed, and finally, the parts are safely separated.
[0063] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. A fluid connector with a pre-unlocking sliding sleeve, characterized in that, include: The outer casing (1) has a female valve seat (2) that is movably connected inside one end; The female end cavity (3) is detachably installed inside the female end valve seat (2); The female valve core (4) is movably installed inside the female cavity (3); The female valve stem (5) is movably installed inside the female valve core (4) and extends toward the female valve seat (2). A return spring (6) is provided between the annular protrusion on the female valve stem (5) and the female valve core (4). The sliding sleeve (7) is slidably installed inside the female end cavity (3). The inner wall of the sliding sleeve (7) near the female end valve seat (2) is dynamically fitted with the outer wall of the female end valve core (4). The outer wall of the sliding sleeve (7) and the outer wall of the female end cavity (3) are provided with a pre-locking mechanism. The male end cavity (8) is movably installed inside the female end cavity (3). The outer wall of the male end cavity (8) is dynamically fitted with the inner wall of the sliding sleeve (7). The male end cavity (8) is provided with a male end valve core (9). The first sealing element (10) is symmetrically arranged inside the female end cavity (3). The two first sealing elements (10) are dynamically fitted to the outer walls of the female end valve core (4) and the sliding sleeve (7) respectively. A second sealing element (11) is provided between the female end valve stem (5) and the female end valve core (4). The third sealing element (12) is installed in the inner wall of the sliding sleeve (7). The third sealing element (12) dynamically fits against the outer wall of the male end cavity (8). When the male end cavity (8) is inserted into the sliding sleeve (7) and continues to advance, the sealing effect between the first sealing element (10) and the second sealing element (11) and the female end valve core (4) is gradually released. At the same time, the third sealing element (12) forms a seal with the outer wall of the male end cavity (8) to replace the first sealing element (10) and achieve isolation between the inside and outside of the cavity.
2. A fluid connector with a pre-unlocking sliding sleeve according to claim 1, characterized in that, The outer wall of the female valve core (4) is provided with a limiting part (13). When the female valve core (4) moves away from the female valve seat (2) to the maximum stroke, the limiting part (13) abuts against the abutting part (14) formed on the inner wall of the female cavity (3).
3. A fluid connector with a pre-unlocking sliding sleeve according to claim 2, characterized in that, The outer wall of the female valve core (4) away from the female valve seat (2) is provided with an annular mating part (15). The inner wall of the sliding sleeve (7) near the female valve core (4) abuts against the annular mating part (15). The first sealing member (10) fits against the outer wall of the sliding sleeve (7).
4. A fluid connector with a pre-unlocking sliding sleeve according to claim 1, characterized in that, The outer wall of the sliding sleeve (7) is provided with a limiting part two (16). After the flow rate in the male end cavity (8) reaches the rated value, the limiting part two (16) on the sliding sleeve (7) abuts against the abutting part two (17) formed on the inner wall of the female end cavity (3).
5. A fluid connector with a pre-unlocking sliding sleeve according to claim 1, characterized in that, The pre-locking mechanism includes a first steel ball (18), a second steel ball (19), and an annular boss (20). There are multiple first steel balls (18), which are arranged in an annular array and are movably embedded in the hole in the wall of the female end cavity (3). The outer wall of the sliding sleeve (7) is provided with an annular sliding groove (21). The inner part of the first steel ball (18) is located in the sliding groove (21) and can slide along it, while the outer part is in contact with the inner wall of the outer shell (1).
6. A fluid connector with a pre-unlocking sliding sleeve according to claim 5, characterized in that, The steel balls (19) are multiple and are distributed in a ring on the female end cavity (3), and are located on the side of the steel ball (18) away from the female end valve core (4). The inner wall of the outer shell (1) is provided with a limiting part (22) to restrict the movement of the steel balls (19). The inner wall of the sliding sleeve (7) is provided with an abutting part (23) on the side near the male end cavity (8). The annular boss (20) is installed on the outer wall of the male end cavity (8). When the connection is completed and in the locked state, the front end of the annular boss (20) abuts against the abutting part (23), and the steel balls (19) are stuck into the inclined surface of the rear end of the annular boss (20) to achieve locking.
7. A fluid connector with a pre-unlocking sliding sleeve according to claim 1, characterized in that, The outer wall of the male valve core (9) is inlaid with a fourth sealing element (24), and the fourth sealing element (24) is dynamically fitted to the inner wall of the male cavity (8).