High-pressure quick connector

Abstract

The utility model discloses a high-pressure quick connector, and belongs to the technical field of hydraulic valves. The joint comprises a male joint, a female joint and a sliding sleeve, wherein a plurality of ball seats are annularly arrayed on the outer wall of the male joint; conical through holes with the same number as the ball seats are formed in the female joint, each through hole is matched with one ball, the outer diameter of each ball is larger than the minimum inner diameter of the corresponding through hole, and a first annular boss is arranged on the outer wall of the female joint; the female connector is sleeved with the sliding sleeve, a second annular boss is arranged in the sliding sleeve, and the sliding sleeve is provided with an elastic element to push the sliding sleeve to move in the axial direction so that the second annular boss can be close to the first annular boss, and the balls are extruded to move inwards in the radial direction along the conical through hole. And the balls are partially embedded into the ball seat and are in surface contact with the ball seat when radially and inwards moving to limit positions. Compared with line contact of a traditional annular groove, the contact area is remarkably increased, pressure is reduced, fatigue damage is relieved, and durability and stability of equipment are improved through surface contact of the balls and the ball seat.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic valve technology, specifically a high-pressure quick connector. Background Technology

[0002] Quick couplings are essential components in fluid transmission systems, primarily used for rapid and reliable connection and disconnection between pipelines. Traditional quick couplings consist of a male and a female connector, with the male connector inserted into the female connector to complete the connection. To ensure the safety and stability of this connection, the female connector typically features a radially movable ball bearing structure. The movement of a sliding sleeve pushes these balls radially, partially engaging them in an annular groove on the male connector, thus achieving a locking mechanism.

[0003] The aforementioned design excels in simplifying connection operations and improving connection efficiency. However, the contact between the ball bearings and the annular groove is a line contact, resulting in a relatively small actual contact area. Under the same load conditions, the contact area experiences greater pressure, which can easily lead to fatigue damage and affect the overall service life and reliability of the quick connector. This is especially true under conditions of long-term high pressure and frequent connection and disconnection, where the contact area is highly susceptible to material fatigue, leading to failure modes such as wear, deformation, and even fracture.

[0004] In summary, improving the contact state between the ball and the annular groove, increasing the contact area, and dispersing the contact pressure to effectively alleviate fatigue damage has become a key technical problem that urgently needs to be solved in the current quick coupling design field. Utility Model Content

[0005] To address the shortcomings of existing technologies, such as high contact pressure and susceptibility to fatigue damage caused by the contact between the ball bearings and the annular groove, the present invention aims to provide a high-pressure quick connector. This connector optimizes the contact mechanism between the ball bearings and the annular groove, increasing the contact area and achieving a more stable, durable, and efficient connection. This improvement not only enhances the reliability and service life of the quick connector but also further strengthens the overall performance and safety of the system.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] A high-pressure quick coupling includes:

[0008] The male connector has multiple ball seats arranged in a ring array on its outer wall.

[0009] The female joint is provided with a plurality of tapered through holes arranged in an annular array on the female joint, the number of the tapered through holes is equal to the number of the ball seats, and the tapered through holes are arranged radially on the female joint, each tapered through hole is gradually reduced in diameter radially inwardly and is provided with a ball, the outer diameter of the ball is greater than the minimum inner diameter of the tapered through hole, and the ball cannot pass through the tapered through hole completely when moving radially inwardly, so that the locking function is realized without falling off; the outer wall of the female joint on one side of the tapered through hole is provided with a first annular boss;

[0010] A sliding sleeve is sleeved on the female joint, the sliding sleeve is provided with a second annular boss in the inside, the sliding sleeve is provided with an elastic element for pushing the sliding sleeve to move axially along the female joint so as to make the second annular boss and the first annular boss close to each other, the second annular boss and the first annular boss extrude the moving space of the ball and push the ball to move radially inwardly along the tapered through hole when they close to each other, until the ball abuts against the inner wall of the second annular boss;

[0011] When the male joint is inserted into the female joint, a part of the ball is inserted into the ball seat and is in surface contact with the ball seat.

[0012] As a specific embodiment of the utility model, when the male joint is inserted into the female joint, the inner wall of the tapered through hole opposite to the opening of the ball seat is a curved surface, and the curved surface and the inner wall of the ball seat form a second ball seat matched with the ball, the volume of the second ball seat is less than 1 / 2 of the volume of the ball, so that the ball can enter the ball seat and be in surface contact with the ball seat.

[0013] As a specific embodiment of the utility model, the male joint is rotatably connected with an annular ring, and the ball seat is arranged on the annular ring, so that the male joint and the female joint can be rotated relative to each other after being connected.

[0014] As a specific embodiment of the utility model, the male joint is provided with an annular groove, and the annular ring is embedded in the annular groove and is rotatably connected with the annular groove.

[0015] Further, the annular ring is spliced by at least two circular arc segments, so as to be installed in the annular groove.

[0016] As a specific embodiment of the utility model, the elastic element is a spring. Advantageous effects

[0017] The utility model sets the ball seat on the male joint, and the ball is in surface contact with the ball seat, which can greatly increase the contact area, reduce the pressure, slow down the fatigue damage, and make the utility model more durable, compared with the traditional mode of setting the annular groove on the male joint and the ball being in linear contact with the annular groove. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1is a sectional view of one specific embodiment of the high-pressure quick connector of the utility model;

[0019] Figure 2 is Figure 1 is a perspective view of the annular ring;

[0020] Figure 3 is Figure 1 is a schematic view of the state after the ball enters the ball seat;

[0021] Figure 4 is Figure 1 is a sectional view of the male connector;

[0022] Figure 5 is Figure 1 is a sectional view of the female connector;

[0023] In the figure, the male connector 100; the female connector 200; the conical through hole 210; the ball 220; the first annular boss 230; the sliding sleeve 300; the second annular boss 310; the elastic element 400; the ball seat 410; the annular ring 420. DETAILED DESCRIPTION

[0024] The utility model will be further explained in detail in combination with the embodiments and the drawings, but the embodiment of the utility model is not limited to this.

[0025] EMBODIMENT

[0026] Please refer to Figures 1 to 3 , which shows the structure of one specific embodiment of the high-pressure quick connector of the utility model. A high-pressure quick connector comprises a male connector 100, a female connector 200, a sliding sleeve 300 and an elastic element 400.

[0027] The outer wall of the male connector 100 is annularly arranged with a plurality of ball seats 410; the female connector 200 is annularly arranged with a plurality of conical through holes 210, and the number of the conical through holes 210 is equal to that of the ball seats 410. Each conical through hole 210 is arranged along the radial direction of the female connector 200 and gradually shrinks in diameter inwardly along the radial direction, and each conical through hole 210 is configured with a ball 220, and the outer diameter of the ball 220 is greater than the minimum inner diameter of the conical through hole 210, so that the ball 220 cannot completely pass through the conical through hole 210 when moving inwardly along the radial direction, thereby realizing the locking function without falling off. The outer wall of the female connector 200 on one side of the conical through hole 210 is provided with a first annular boss 230.

[0028] The sleeve 300 is sleeved outside the female joint 200 and can slide along the axial direction thereof. The sleeve 300 is internally provided with a second annular boss 310, and the sleeve 300 is matched with an elastic element 400 (such as a spring) for pushing the sleeve 300 to move along the axial direction of the female joint 200. Under the pushing of the elastic element 400, the second annular boss 310 approaches the first annular boss 230, thereby extruding the moving space of the ball 220, so that the ball 220 moves radially inward along the tapered through hole 210 until the ball 220 abuts against the inner wall of the second annular boss 310. When the male joint 100 is inserted into the female joint 200, the ball 220 moves radially inward along the tapered through hole 210 to the limit position (the ball 220 abuts against the inner wall of the second annular boss 310), and a part of the ball 220 is inserted into the ball seat 410 and in surface contact with the ball seat 410. Since the inner wall of the second annular boss 310 limits the radial outward movement of the ball 220, the ball 220 locks the male joint 100 and the female joint 200, preventing the two from being separated. Conversely, when the sleeve 300 is manually pushed to move reversely so that the elastic element 400 is compressed, the second annular boss 310 moves away from the first annular boss 230, and the moving space of the ball 220 gradually increases, so that the ball seat 410 applies a pushing force to the ball 220 when the male joint 100 and the female joint 200 are separated from each other, thereby enabling the ball 220 to move radially outward along the tapered through hole 210, so as to release the locking of the male joint 100 and the female joint 200.

[0029] The utility model discloses the line contact of ball 220 and male joint 100 in traditional quick connector is changed into surface contact, the contact area of ball 220 and male joint 100 is increased, fatigue damage is reduced, and it is favorable to improve the stability and durability of equipment.

[0030] In some embodiments, when the male joint 100 is inserted into the female joint 200, the inner wall of the opening of the tapered through hole 210 opposite to the ball seat 410 is a curved surface, and the curved surface and the inner wall of the ball seat 410 form a second ball seat matched with the ball 220, and the volume of the second ball seat is less than 1 / 2 of the volume of the ball 220, so that the ball 220 can enter the ball seat and be in surface contact with the ball seat. As shown in FIG. 4, the ball 220 is in surface contact with the male joint 100 and the female joint 200 at the same time, which is conducive to further reducing fatigue damage. Figure 3

[0031] In some embodiments, the annular ring 420 is rotatably connected to the male joint 100, and the ball seat 410 is arranged on the annular ring 420, so that the male joint 100 and the female joint 200 can be rotated relative to each other after being connected. Further, the annular ring 420 is embedded in the annular groove of the male joint 100 and is rotatably connected to the annular groove. In addition, in order to facilitate the installation of the annular ring 420 in the annular groove of the male joint 100, the annular ring 420 is formed by splicing two semicircular segments.

[0032] ​The above merely is preferable specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of the change or replacement in the technical range disclosed by the utility model embodiment, and all should be covered in the protection scope of the utility model.

Claims

1. A high pressure quick coupling, characterized in that, The utility model relates to a ball seat and ball joint, comprising: a male joint, the outer wall of which is arranged with a plurality of ball seats in annular array; a female joint, the outer wall of which is arranged with a plurality of tapered through holes in annular array, equal in number to the ball seats and arranged radially along the female joint, each tapered through hole gradually tapering radially inward along the female joint and being configured with a ball, the outer diameter of the ball being greater than the minimum inner diameter of the tapered through hole; the outer wall of the female joint on one side of the tapered through hole is provided with a first annular boss; a sliding sleeve provided outside the female joint, the sliding sleeve being provided with a second annular boss inside, the sliding sleeve being provided with an elastic element for pushing the sliding sleeve to move axially along the female joint so as to make the second annular boss and the first annular boss approach each other, the second annular boss and the first annular boss pressing the movable space of the ball and pushing the ball to move radially inward along the tapered through hole when they approach each other until the ball abuts against the inner wall of the second annular boss; wherein, when the male joint is inserted into the female joint, a part of the ball is inserted into the ball seat and in surface contact with the ball seat when the ball moves radially inward along the tapered through hole to the limit position.

2. The high pressure quick coupling of claim 1, wherein, When the male joint is inserted into the female joint, the inner wall of the tapered through hole opposite the opening of the ball seat is a curved surface, and the curved surface and the inner wall of the ball seat form a second ball seat matching the ball, the volume of the second ball seat being less than 1 / 2 of the volume of the ball.

3. The high pressure quick coupling of claim 1, wherein, The male joint is rotatably connected with an annular ring, and the ball seat is arranged on the annular ring.

4. The high pressure quick coupling of claim 3, wherein, The male joint is provided with an annular groove, and the annular ring is embedded in the annular groove and rotatably connected with the annular groove.

5. The high pressure quick coupling of claim 4, wherein, The annular ring is spliced by at least two circular arc segments.

6. The high pressure quick coupling of claim 1, wherein, The elastic element is a spring.

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