A self-locking hydraulic pipe joint

Abstract

This utility model discloses a self-locking hydraulic pipe joint, including a male joint and a female joint. The male joint has a pin, and a sealing sleeve and a spring are slidably fitted onto the surface of the pin. Under the action of the spring, the sealing sleeve can cover the connecting hole on the pin. A locking ring groove is provided on the outer wall of the pin. The female joint has an axially sliding valve core inside, which is connected to the spring and used to close the inner flow channel. The female joint also has multiple radially arranged locking pins, which cooperate with the locking ring groove of the pin to achieve mechanical locking. During the insertion process, the pin pushes the valve core back and compresses the spring, while the sealing sleeve backs to connect the connecting hole with the inner flow channel for flow. The locking pins automatically spring into the locking ring groove to achieve self-locking connection. The locking pins are made of ferromagnetic material and can be quickly unlocked by magnetic attraction from an external magnetic ring. This utility model has a compact structure, automatic sealing, self-locking, and quick unlocking functions, is easy to operate, and is suitable for hydraulic systems with high sealing and high reliability requirements.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, specifically a self-locking hydraulic pipe connector. Background Technology

[0002] Hydraulic pipelines serve as crucial channels for transmitting hydraulic energy and signals in fields such as industrial automation, construction machinery, rail transportation, and hydraulic systems. The reliability and sealing of their connections are of paramount importance to the safe and stable operation of the entire system. Traditional hydraulic pipe fittings often employ threaded connections, flange connections, or plug-in quick-connect structures. These connection methods are prone to problems such as loosening during long-term use, hydraulic oil leakage, and cumbersome disassembly and assembly, affecting efficiency and system performance.

[0003] While quick-connect hydraulic couplings offer some ease of operation in existing technologies, they still suffer from the following shortcomings: On the one hand, most structures require external manual mechanical mechanisms (such as rotary locks, manual retaining rings, etc.) to lock after the male and female connectors are inserted and connected, which is complicated and increases the risk of misoperation. Especially in high-voltage or high-frequency connection environments, structures without automatic locking and unlocking functions are difficult to adapt to the needs of efficient and rapid operation.

[0004] On the other hand, existing plug-in hydraulic couplings often lack effective internal and external sealing protection when not inserted, which can easily lead to hydraulic oil leakage, site contamination, and even personnel contact injuries. In addition, some couplings still require external tools to unlock after connection, making disassembly and assembly inconvenient and reducing efficiency.

[0005] To address the aforementioned issues, there is an urgent need for a hydraulic pipe joint structure with automatic sealing, automatic locking, and rapid unlocking functions. This structure should be able to automatically complete hydraulic switching and mechanical locking during the insertion process, while also enabling tool-free rapid release, thereby improving connection stability, sealing performance, and ease of operation. Utility Model Content

[0006] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0007] Therefore, the technical solution adopted by this utility model is: a self-locking hydraulic pipe joint, including a male joint and a female joint, which realizes automatic connection, sealing and mechanical locking functions through multiple sets of mating structures, and can be quickly unlocked by magnetic attraction. The overall structure is compact, the connection operation is simple, and it is suitable for high-reliability hydraulic connection scenarios.

[0008] In a preferred embodiment, the self-locking hydraulic pipe fitting includes a male fitting and a female fitting, wherein: one end of the male fitting is provided with a pin, and a sealing sleeve and a spring are slidably fitted on the surface of the pin; the surface of the pin is provided with a plurality of radially arranged connecting holes; the spring is used to push the sealing sleeve to extend in the direction of covering the connecting holes to achieve automatic sealing before insertion; a locking ring groove is provided on the outer wall of the pin; a valve core is slidably fitted on the inner side of the female fitting; the female fitting is provided with a plurality of internal flow channels corresponding one-to-one with the connecting holes, distributed along the circumferential direction; a plurality of radially arranged locking pins are also provided inside; one end of the valve core is connected to a column spring, which is used to block the port of the internal flow channel when not inserted.

[0009] Specifically, the above structure enables double-end sealing when not inserted, preventing hydraulic oil leakage and ensuring system cleanliness and safety.

[0010] In a preferred embodiment, the configuration is further as follows: during the insertion of the column head into the female connector, the end face of the column head contacts and pushes the valve core to retract axially, compressing the column spring and gradually opening the inner flow channel; at the same time, the sealing sleeve retracts during the insertion of the column head, compressing the spring to gradually expose the connecting hole, and finally achieving the docking of the connecting hole and the inner flow channel, thus completing the hydraulic passage connection.

[0011] Specifically, this structural design enables automatic activation during the insertion process, avoiding manual adjustment and improving connection efficiency and safety.

[0012] In a preferred embodiment, the locking pin is further configured such that one end of the locking tongue pin is provided with an elastic element, which can automatically spring into the locking ring groove on the outer wall of the pin after the pin is inserted into place, thereby achieving a self-locking connection of the joint.

[0013] Specifically, through a flexible locking design, mechanical self-locking is achieved without the need for external force, effectively preventing accidental disengagement and improving connection stability and system reliability.

[0014] In a preferred embodiment, the locking pin is further configured such that: the locking pin is made of ferromagnetic material, and a magnetic ring structure is provided on the outer periphery of the female connector. When it is necessary to disconnect the connector, the locking pin is radially retracted and disengaged from the locking ring groove by applying external magnetic force, thereby releasing the locking state.

[0015] Specifically, this structure enables tool-free quick unlocking, making it suitable for situations requiring frequent disassembly or working in confined spaces, thus improving flexibility and efficiency.

[0016] In a preferred embodiment, the sealing sleeve is further configured such that a sealing plug is provided inside, which, together with the column head structure, is used to seal the port of the connecting hole in the unconnected state to prevent liquid leakage.

[0017] Specifically, the double-sealed structure ensures that hydraulic oil will not leak during any insertion or removal process, improving the system's cleanliness and environmental performance.

[0018] In a preferred embodiment, the inner flow channels are evenly distributed around the outer periphery of the valve core in a circumferential direction, and the inner diameter of the female connector is equal to the outer diameter of the valve core and the column head, so that the connecting hole and the inner flow channel port are accurately aligned after the column head is inserted, thereby achieving a stable multi-point connection.

[0019] Specifically, this structure ensures the precision of the flow channel connection and the smooth flow of hydraulic passages, effectively improving the connection sealing and system transmission efficiency.

[0020] In summary, this utility model provides a hydraulic pipe joint that can automatically seal, self-lock, quickly unlock, and reliably seal through structural optimization and integration of multiple functions. It is particularly suitable for hydraulic system applications with high-frequency connection, rapid disassembly and assembly, and high sealing requirements, and has good industrial adaptability and promotional value.

[0021] The beneficial effects achieved by this utility model are as follows: 1. In this utility model, the cooperative structure design between the sealing sleeve and the column head achieves effective sealing of the column head connecting hole when not inserted, and automatically opens the channel during insertion, ensuring the automation and sealing of hydraulic on / off control, effectively avoiding liquid leakage and pollution risks, and improving the safety of system operation.

[0022] 2. In this utility model, an automatic matching structure of locking tongue pin and locking ring groove is adopted. Combined with ferromagnetic material and magnetic unlocking method, mechanical locking is automatically achieved after the hydraulic passage is connected. The lock can be quickly released by an external magnetic field, which significantly improves the connection reliability and disassembly convenience of the joint and meets the needs of high-frequency operation and maintenance. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model; Figure 2 This is a schematic diagram of the cross-sectional structure of the male and female connectors according to an embodiment of the present invention; Figure 3 This is a schematic cross-sectional view of the male and female connectors in the engagement state according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the female connector structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the column head surface and locking pin structure according to an embodiment of the present invention.

[0024] Figure label: 100. Male connector; 110. Sealing sleeve; 120. Column head; 111. Spring; 121. Connecting hole; 122. Locking ring groove; 200. Female connector; 210. Valve core; 220. Inner flow channel; 230. Locking pin; 211. Column spring. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0026] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0027] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a self-locking hydraulic pipe joint.

[0028] Combination Figures 1-5 As shown, the present invention provides a self-locking hydraulic pipe fitting, including a male connector 100 and a female connector 200.

[0029] One end of the male connector 100 is provided with a pin 120, and a sealing sleeve 110 and a spring 111 are slidably fitted onto the surface of the pin 120. The sealing sleeve 110 can slide axially on the outer surface of the pin 120, and a spring 111 is provided between its inner cavity and the pin 120. The spring 111 is used to push the sealing sleeve 110 outward to cover a number of communicating holes 121 opened on the surface of the pin 120. The communicating holes 121 are radially distributed along the circumference of the pin 120 to enable communication between the pin 120 and the hydraulic channel inside the female connector 200. To achieve mechanical locking, a locking ring groove 122 is also provided on the outer wall of the pin 120 for engaging with a locking tongue pin 230 provided inside the female connector 200.

[0030] A valve core 210 is slidably sleeved on the inner side of the female connector 200. The valve core 210 can slide axially within the inner cavity of the female connector 200 and make sealing contact with the inner wall of the female connector 200, thereby closing or opening the inner flow channel 220. The inner wall of the female connector 200 is provided with a plurality of inner flow channels 220, which correspond one-to-one with the connecting holes 121 on the column head 120 and are evenly distributed in the circumferential direction. The inner cavity of the female connector 200 is also provided with a plurality of radially arranged locking pins 230, which can slide freely in the radial direction and are used to insert into the locking ring groove 122 of the column head 120 to form a self-locking mechanism.

[0031] like Figure 2 and Figure 3As shown, one end of the valve core 210 is fixedly connected to the inner wall of the female connector 200 via a spring 211. When not inserted, the spring 211 pushes the front end of the valve core 210 against the end of the female connector 200, sealing one end of the inner flow channel 220 and preventing liquid leakage. When the piston head 120 is inserted into the female connector 200, its end face contacts the front end of the valve core 210 and pushes the valve core 210 inward, thereby compressing the spring 211 and opening the inner flow channel 220.

[0032] During the insertion process, the forward movement of the column head 120 will simultaneously push the sealing sleeve 110 to retract under the action of the spring 111, so that the connecting hole 121 is gradually exposed from the state of being covered by the sealing sleeve 110, and finally achieves port docking with the inner flow channel 220 in the female connector 200, thus completing the connection of the hydraulic passage.

[0033] Furthermore, such as Figure 4 and Figure 5 As shown, to achieve quick disassembly and automatic locking, one end of the locking pin 230 is provided with an elastic element for pushing it to slide in the radial direction. When the pin head 120 is fully inserted into the female connector 200, its locking ring groove 122 aligns with the locking pin 230, and the locking pin 230 automatically springs into the locking ring groove 122 under the action of the elastic element, thereby achieving mechanical locking of the connector.

[0034] To facilitate unlocking, the locking pin 230 is made of ferromagnetic material, and a magnetic ring structure can be provided on the outer periphery of the female connector 200. When the connector needs to be disassembled, the magnetic ring structure generates magnetic force to attract the locking pin 230 outward, causing it to disengage from the locking ring groove 122, thus releasing the locking state and realizing the quick disconnection of the male connector 100 and the female connector 200.

[0035] Furthermore, to improve sealing performance, the sealing sleeve 110 has a sealing plug inside, the size and structure of which can cover and seal the exposed part of the connecting hole 121 to avoid oil leakage before insertion.

[0036] Preferably, the inner diameter of the female connector 200 matches the outer diameter of the valve core 210 and the column head 120, and can maintain a good interference fit after the male connector 100 is inserted, ensuring that the connecting hole 121 and the inner flow channel 220 are reliably connected, so as to realize the effective opening and sealed transmission of the hydraulic passage.

[0037] In summary, this utility model achieves integrated functions such as automatic unsealing, docking, sealing, locking, and unlocking during the insertion process by setting a retractable sealing sleeve and a locking groove at the male connector's post end, and setting a corresponding sliding valve core, locking pin, and internal flow channel in the female connector. It has a reasonable structure, stable connection, and convenient assembly and disassembly, and has good practicality and promotional value.

[0038] Working principle and usage process of this utility model: This utility model provides a self-locking hydraulic pipe joint, which realizes the automatic connection and self-locking function of hydraulic pipeline through the cooperation of structures such as the column head 120, sealing sleeve 110, spring 111, valve core 210, column spring 211 and locking tongue pin 230. At the same time, it has a convenient and quick unlocking structure, ensuring the safety, reliability and ease of operation of the joint in hydraulic connection.

[0039] Its core working principle is as follows: Sealing and blocking state (not plugged in): In the initial state, the sealing sleeve 110 extends under the action of the spring 111 to cover the connecting hole 121 on the column head 120 to prevent hydraulic oil leakage; at the same time, the valve core 210 in the female connector 200 blocks the inner flow channel 220 under the action of the column spring 211 to maintain the sealing state of the female connector.

[0040] Insertion process (insertion action): When the pin 120 of the male connector 100 is inserted into the female connector 200, the front end of the pin pushes the valve core 210 to retract inward and compresses the spring 211; the sealing sleeve 110 is also forced to retract, compressing the spring 111, so that the connecting hole 121 is gradually exposed and achieves flow connection with the inner flow channel 220 in the female connector.

[0041] Self-locking (engagement complete): After the pin is inserted into place, the locking ring groove 122 on its outer wall is aligned with the locking tongue pin 230 inside the female connector; under the action of the elastic element, the locking tongue pin 230 automatically springs into the locking ring groove 122, realizing a stable connection and mechanical locking between the male and female connectors.

[0042] Unlocking and retraction (disconnection operation): The locking pin 230 is made of ferromagnetic material. A magnetic ring structure can be set on the outside of the female connector. When it is necessary to disconnect the connector, a magnetic force is applied to pull the locking pin 230 back, thereby disengaging it from the locking ring groove 122, releasing the locking state, and completing the quick disengagement.

[0043] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A self-locking hydraulic pipe fitting, characterized in that, include: Male connector (100) and female connector (200). One end of the male connector (100) is provided with a post (120), and a sealing sleeve (110) and a spring (111) are slidably sleeved on the surface of the post (120). The surface of the post (120) is provided with a plurality of radially arranged connecting holes (121). The spring (111) is used to push the sealing sleeve (110) to extend in the direction of covering the surface of the connecting holes (121). The outer wall of the post (120) is provided with a locking ring groove (122). A valve core (210) is slidably sleeved on the inner side of the female connector (200). Several internal flow channels (220) are opened on the inner side of the female connector (200) and are arranged one-to-one with the connecting holes (121). Several radially arranged locking pins (230) are movably installed inside the female connector (200). A column spring (211) is fixedly connected to one side of the valve core (210). The outer periphery of the valve core (210) slides against the inner wall of the female connector (200) to seal one end of the internal flow channel (220).

2. The self-locking hydraulic pipe joint according to claim 1, characterized in that, During the process of inserting the column head (120) into the female connector (200), the end face of the column head (120) pushes the valve core (210) to retract axially and compress the column spring (211). At the same time, the sealing sleeve (110) retracts and compresses the spring (111), so that the connecting hole (121) is gradually exposed and finally connected to one end port of the inner flow channel (220).

3. The self-locking hydraulic pipe fitting according to claim 1 or 2, characterized in that, One end of the locking pin (230) is provided with an elastic element for pushing the locking pin (230) to slide radially. The locking pin (230) cooperates with the locking ring groove (122) on the pin head (120) to automatically lock the connection state after the pin head (120) is inserted into the female connector (200) in place.

4. The self-locking hydraulic pipe joint according to claim 3, characterized in that, The locking pin (230) is made of ferromagnetic material and can achieve magnetic attraction by fitting a magnetic ring structure around the female connector (200), so that the locking pin (230) can be radially retracted and disengaged from the locking ring groove (122) to release the lock.

5. The self-locking hydraulic pipe joint according to claim 1, characterized in that, The sealing sleeve (110) is slidably sleeved on the surface of the column head (120), and the sealing sleeve (110) is provided with a sealing plug for sealing the port of the connecting hole (121).

6. The self-locking hydraulic pipe joint according to claim 1, characterized in that, The number of inner flow channels (220) is several and they are evenly distributed in a circumferential direction on the outer periphery of the valve core (210). The inner cavity diameter of the female connector (200) is equal to the outer diameter of the valve core (210) and the column head (120). After the column head (120) is inserted, the port of the connecting hole (121) is connected to one end port of the inner flow channel (220) to realize the opening of the hydraulic passage.

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