Hydraulic quick-change connector female head structure for automatic butt joint

Abstract

The utility model belongs to the technical field of hydraulic quick-change connectors, and particularly relates to a female head structure of a hydraulic quick-change connector for automatic butt joint, which comprises a female head shell provided with a limiting step; the female head seat is connected with the female head shell; the valve sleeve seat is fixed between the female head shell and the female head seat through threads; the valve element is fixed between the valve sleeve seat and the female head seat through the two supporting rings, the limiting step at the end of the female head shell is matched with the oil cylinder, the function of automatic butt joint with a male head of a quick connector can be achieved, the butt joint efficiency is improved, and the requirement for automatic production is met. The valve element sealing ring made of polyurethane can resist higher residual pressure, and cannot be extruded out of the sealing groove of the valve element in the process that the male head pushes the dustproof sleeve and the valve sleeve of the female head to open, so that the male head and the female head can still realize repeated butt joint under the condition of certain residual pressure, and the service life of the male head and the female head is prolonged. The problems of sealing failure and oil leakage caused by residual pressure are avoided, and the stability and reliability of equipment operation are improved.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic quick-connect coupling technology, specifically relating to a female head structure of a hydraulic quick-connect coupling for automatic docking. Background Technology

[0002] In hydraulic systems, quick couplings play a crucial role in connecting and disconnecting hydraulic lines. With the continuous development of industrial automation, the demand for automated connection of hydraulic quick couplings is increasing.

[0003] Currently, the connection of hydraulic quick couplings mostly relies on manual operation. Manually connected quick coupling female heads have relatively complex structures and low internal sealing residual pressure resistance. This means that in practical use, the male and female couplings can only be connected when there is no residual pressure inside the female head. For example, when maintaining or replacing parts in the hydraulic systems of some large mechanical equipment, reconnecting quick couplings requires a significant amount of time and effort to release the residual pressure inside the female head, making the operation cumbersome and inefficient.

[0004] Meanwhile, the internal sealing rings of existing quick-connect female connectors are typically made of rubber. When residual pressure exists inside the female connector, the rubber sealing ring can easily be squeezed out of the sealing groove. Once the sealing ring shifts, the seal between the valve sleeve and the valve core fails, leading to oil leakage. This not only wastes hydraulic oil but may also affect the normal operation of the equipment and even cause safety accidents. Therefore, existing technology cannot meet the requirements of automated docking for quick-connect female connectors to have a simple structure and be able to withstand high residual pressure. Utility Model Content

[0005] To address the problems mentioned in the background section, this invention provides a simple and reliable quick-connect female head structure that meets the requirements of automated docking. Specifically, during the automatic docking process of the quick-connect male and female heads, even with high residual pressure inside the female head, repeated docking can be effectively achieved without oil leakage.

[0006] Structural Design: The hydraulic quick-change female head structure is mainly composed of valve core sealing ring, valve core, valve sleeve, dust cover, valve sleeve spring, dust cover spring, valve seat, support ring, female head seat, female head housing, valve sleeve sealing ring, valve seat sealing ring and other components.

[0007] Key Connections and Sealing: The female head housing has a limiting step to restrict axial displacement of the female head during docking. The female head housing and the female head seat are fixed to the valve sleeve seat via threads. The female head seat and the valve sleeve seat are sealed by a valve seat sealing ring. The valve sleeve seat and the valve sleeve are sealed by a sealing ring. The valve sleeve and the valve core are sealed by a valve core sealing ring, which is made of polyurethane. Compared to traditional rubber sealing rings, this type of valve core sealing ring can better resist higher residual pressure and is less likely to be squeezed out of the sealing groove.

[0008] Valve core fixing and hydraulic oil flow: The valve core is fixed between the valve sleeve seat and the female head seat by two support rings. The support rings are provided with oil holes for hydraulic oil to pass through, ensuring the normal flow of hydraulic oil inside the joint.

[0009] Spring function: A valve sleeve spring is installed between the valve sleeve and the valve sleeve seat to maintain a sealed state between the valve sleeve and the valve core, ensuring a sealing effect. A dust cover spring is installed between the dust cover and the valve sleeve seat to keep the dust cover in an extended state, preventing external impurities from entering the joint and extending the service life of the joint.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] The utility model has significant advantages. The limiting step at the end of the female connector housing, in conjunction with the hydraulic cylinder, enables automatic docking with the male quick-connect connector, improving docking efficiency and meeting the needs of automated production. The polyurethane valve core sealing ring can withstand high residual pressure. During the process of the male connector pushing the dust cover and valve sleeve of the female connector open, it will not be squeezed out of the valve core's sealing groove, thus ensuring that the male and female connectors can still achieve repeated docking even with a certain amount of residual pressure. This avoids sealing failure and oil leakage caused by residual pressure, improving the stability and reliability of equipment operation. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0015] Figure 3 This is a schematic diagram of the docking structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the valve core and support ring structure of this utility model;

[0017] Figure 5 This is a schematic diagram of the support ring structure of this utility model;

[0018] In the picture:

[0019] 1. Valve core sealing ring, 2. Valve core, 3. Valve sleeve, 4. Dust cover, 5. Valve sleeve spring, 6. Dust cover spring, 7. Valve seat, 8. Support ring, 9. Female head seat, 10. Female head housing, 11. Valve sleeve sealing ring, 12. Valve seat sealing ring, 13. Quick connector male head, 14. Oil cylinder, 15. Limiting step, 16. Oil hole. Detailed Implementation

[0020] 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.

[0021] Example 1

[0022] like Figure 1-5 As shown;

[0023] A hydraulic quick-connect female head structure for automatic docking.

[0024] This implementation plan addresses the technical problems existing in the prior art, such as those disclosed in the background section above: "In the prior art, the connection of hydraulic quick couplings mostly relies on manual operation. The female head of manually connected quick couplings has a relatively complex structure and a low internal sealing residual pressure resistance level. This means that in actual use, the connection operation of the male and female heads can only be completed when there is no residual pressure inside the female head. For example, when maintaining or replacing parts in the hydraulic system of some large mechanical equipment, if the quick coupling needs to be reconnected, a lot of time and effort must be spent to release the residual pressure inside the female head, which is cumbersome and inefficient."

[0025] Meanwhile, the sealing rings inside existing quick-connect female connectors are typically made of rubber. When residual pressure exists inside the female connector, the rubber sealing ring can easily be squeezed out of the sealing groove. Once the sealing ring shifts, the seal between the valve sleeve and the valve core fails, leading to oil leakage. This not only wastes hydraulic oil but may also affect the normal operation of the equipment and even cause safety accidents. In practical terms, this problem is clearly a real and difficult-to-solve issue. Therefore, to address this technical problem, an automatic docking hydraulic quick-connect female connector structure is provided.

[0026] like Figure 1-5 As shown in the figure;

[0027] In summary, the above includes:

[0028] Female head housing 10, wherein the female head housing 10 is provided with a limiting step 15;

[0029] The female head seat 9 is connected to the female head housing 10; the valve sleeve seat 7 is fixed between the female head housing 10 and the female head seat 9 by the threads of the female head housing 10.

[0030] The valve core 2 is fixed between the valve sleeve seat 7 and the female head seat 9 by two support rings 8, and the support rings 8 are provided with oil holes 16.

[0031] Valve sleeve 3 is sleeved outside valve core 2, and valve sleeve spring 5 is provided between valve sleeve 3 and valve sleeve seat 7;

[0032] Dust cover 4 is connected to valve sleeve seat 7, and a dust cover spring 6 is provided between dust cover 4 and valve sleeve seat 7;

[0033] Valve core sealing ring 1 is disposed between valve sleeve 3 and valve core 2, and valve core sealing ring 1 is made of polyurethane.

[0034] Valve sleeve sealing ring 11 is disposed between valve sleeve seat 7 and valve sleeve 3;

[0035] The valve seat sealing ring 12 is disposed between the female head seat 9 and the valve sleeve seat 7.

[0036] The limiting step 15 is used to limit the axial displacement of the female head during the docking process.

[0037] The valve sleeve spring 5 keeps the valve sleeve 3 and valve core 2 in a sealed state.

[0038] The dust cover spring 6 keeps the dust cover 4 in the extended position.

[0039] Installation and Assembly: When installing the female head structure of this hydraulic quick-connect coupling, first install the valve core sealing ring in the sealing groove of the valve core, ensuring a firm installation and good seal. Next, fix the valve core between the valve sleeve seat and the female head seat using two support rings, ensuring that the oil holes on the support rings are aligned with the corresponding hydraulic oil passages to ensure normal hydraulic oil flow. Then, install the valve sleeve on the valve sleeve seat and install a valve sleeve spring between the valve sleeve and the valve sleeve seat, so that the valve sleeve remains sealed to the valve core under the action of the spring. Install the valve seat sealing ring between the female head seat and the valve sleeve seat to achieve a seal between them. Then, fix the female head seat to the female head housing using a threaded connection, ensuring a firm connection. Finally, install the dust cover on the valve sleeve seat and install a dust cover spring between the dust cover and the valve sleeve seat, so that the dust cover can remain in the extended position.

[0040] Docking Process: During automatic docking, the hydraulic cylinder pushes the female quick-connect coupling towards the male. As the female approaches the male, the male first contacts and pushes the dust sleeve. Under the thrust of the male, the dust sleeve overcomes the spring force of the dust sleeve and retracts, while the male continues to push the valve sleeve to the right. During this process, because the valve core sealing ring is made of polyurethane, it can resist the high residual pressure inside the female and will not be squeezed out of the valve core's sealing groove. As the valve sleeve opens, the male and female couplings gradually dock, connecting the hydraulic lines. After docking, the valve sleeve maintains a seal with the valve core under the action of the valve sleeve spring, preventing hydraulic oil leakage. When disconnection is required, the hydraulic cylinder pulls the female coupling, separating the male and female couplings. The valve sleeve closes to the left under the action of the valve sleeve spring, returning to its initial state.

[0041] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A female structure of a hydraulic quick coupling for automatic docking, characterized in that, The utility model relates to a kind of valve, including: Female head shell (10), the female head shell (10) is equipped with limiting step (15); Female head seat (9) is connected with female head shell (10);Valve sleeve seat (7) is fixed between female head shell (10) and female head seat (9) by the thread of female head shell (10); Valve core (2) is fixed between valve sleeve seat (7) and female head seat (9) by two support rings (8), and oil hole (16) is equipped on the support ring (8); Valve sleeve (3) is sleeved outside valve core (2), and valve sleeve spring (5) is equipped between valve sleeve (3) and valve sleeve seat (7); Dust cover (4) is connected with valve sleeve seat (7), and dust cover spring (6) is equipped between dust cover (4) and valve sleeve seat (7); Valve core sealing ring (1) is arranged between valve sleeve (3) and valve core (2), and valve core sealing ring (1) is polyurethane material; Valve sleeve sealing ring (11) is arranged between valve sleeve seat (7) and valve sleeve (3); Valve seat sealing ring (12) is arranged between female head seat (9) and valve sleeve seat (7).

2. The female hydraulic quick coupling structure for automatic docking according to claim 1, characterized in that, The limiting step (15) is used to limit the axial displacement of female head during docking.

3. The female hydraulic quick coupling structure for automatic docking according to claim 1, characterized in that: The valve sleeve spring (5) keeps the closed state between valve sleeve (3) and valve core (2).

4. The female hydraulic quick coupling structure for automatic docking according to claim 1, characterized in that: The dust cover spring (6) keeps dust cover (4) in extended state.

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