A rotatable tubing connection assembly that is easy to install

Abstract

A tubing connection assembly, specifically an easy-to-install rotatable tubing connection assembly, is disclosed. It includes a rotatable connector and two identical straight connectors, a first straight connector and a second straight connector. The rotatable connector is located inside the inlet end, and the inner wall of the outlet port has a first internal thread. The first straight connector has an external thread and is threaded to the outlet port. The rotatable connector has a second internal thread and is threaded to the second straight connector. By providing internal threads at the inlet and outlet ports of the rotatable connector and an inclined mating surface at the lower end of the internal thread, and then threading the straight connectors with external threads at the inlet and outlet ends, a sealing groove is provided at the front end of the external thread, and an O-ring seal is used to seal the connection with the inclined mating surface of the rotatable connector. This direct connection structure provides a more robust connection, and the sealing effect with the O-ring is better, effectively improving tubing connection efficiency, enhancing sealing performance, and ensuring equipment safety.

Description

Technical Field

[0001] This utility model relates to an oil pipe connection assembly, specifically an easy-to-install rotatable oil pipe connection assembly. Background Technology

[0002] In some mechanical equipment that requires a drive, oil pipes are usually needed to connect the oil supply mechanism and the power mechanism for normal operation. Connecting joints are often used between the oil pipes and the mechanical equipment for reliable sealing and fixation.

[0003] Traditional connection methods typically employ the following structure: a threadless connector body is fitted at the end of the oil pipe, which is then inserted into a threaded nut. During installation, the oil pipe connector body must be aligned with the threaded interface on the machinery, and the nut is then tightened to engage the internal thread with the external thread of the equipment interface, thus connecting and securing the oil pipe to the equipment. Teflon tape is wrapped around the threaded interface of the equipment to cooperate with the nut, achieving a sealed connection. However, in actual operation, leaks frequently occur due to damage to the Teflon tape, causing oil to seep from the connection point. In severe cases, this can even damage the equipment. Furthermore, some equipment installation spaces are quite narrow, often providing very limited or even completely obstructed space for circumferential rotation of the nut. In such confined spaces, workers find it difficult to use conventional tools or apply sufficient rotational torque to reliably tighten the nut or perform subsequent maintenance disassembly, resulting in a time-consuming, labor-intensive, and inefficient connection process, and potentially leading to leakage risks due to improper tightening. Therefore, an easy-to-install rotatable oil pipe connection assembly is proposed to solve the problems existing in the current technology. Utility Model Content

[0004] The purpose of this utility model is to address the defects or deficiencies in the existing technology by providing an easy-to-install rotatable oil pipe connection assembly. This assembly features an internal thread at the inlet and outlet ports of the rotatable connector, with an inclined mating surface at the lower end of the internal thread. A straight connector with external threads is then used at the inlet and outlet ends for threaded connection. A sealing groove is provided at the front end of the external thread, and an O-ring seal is used to seal the connection with the inclined mating surface of the rotatable connector. This direct connection structure provides a more robust connection, and the sealing effect is better with the O-ring seal, effectively improving oil pipe connection efficiency, enhancing sealing performance, and ensuring equipment safety.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: it includes a rotary connector 1 and a first straight connector 2 and a second straight connector 3 with the same structure. The rotary connector 1 has a hollow cavity structure, and the cavity is L-shaped. The end of the short cavity is an oil outlet port 13, and the long cavity is an oil inlet end 11. A rotary head 12 is provided inside the oil inlet end 11. The inner wall of the oil outlet port 13 is provided with a first internal thread 15. The first straight connector 2 is provided with an external thread 25. The first straight connector 2 is threadedly connected to the oil outlet port 13. The inner wall of the rotary head 12 is provided with a second internal thread 121. The rotary head 12 is threadedly connected to the second straight connector 3.

[0006] Furthermore, the lower end of the first internal thread 15 is provided with a first inclined mating surface 14.

[0007] Furthermore, a sealing ring mounting groove 23 is provided at one end of the first straight connector 2 near the opening, and a first O-ring 4 is provided in the sealing ring mounting groove 23. A second O-ring 5 is provided on the second straight connector 3.

[0008] Furthermore, the sealing ring mounting groove 23 is provided with a second inclined mating surface 24 on the side away from the opening, and the second inclined mating surface 24 has the same inclination angle as the first inclined mating surface 14.

[0009] Furthermore, the first straight connector 2 includes a connector body 21 and a rotating part 22. The rotating part 22 is an integral structure with the connector body 21 and is located near the center of the connector body 21. The rotating part 22 has a regular hexagonal structure, and the external thread 25 is located on the connector body 21.

[0010] Furthermore, the connection between the rotating head 12 and the oil inlet end 11 is provided with two sets of rotating sealing grooves 112, and rotating sealing rings 7 are provided on the rotating sealing grooves 112. There are also two rotating sealing rings 7.

[0011] Furthermore, positioning grooves 122 are provided between the rotary sealing grooves 112.

[0012] Furthermore, two ball bearing mounting grooves 111 with internal threads are symmetrically arranged on the oil inlet end 11. The ball bearing mounting grooves 111 are positioned corresponding to the positioning grooves 122, and positioning balls 6 are provided in the ball bearing mounting grooves 111. The positioning balls 6 are constrained in the ball bearing mounting grooves 111 by screws and are in rolling connection with the positioning grooves 122.

[0013] After adopting the above technical solution, the beneficial effects of this utility model are as follows: by setting internal threads at the inlet and outlet ports of the rotary connector and setting an inclined mating surface at the lower end of the internal thread, and then setting a straight connector with external threads at the inlet and outlet ends for threaded connection, and setting a sealing groove at the front end of the external thread and then using an O-ring seal to seal the connection with the inclined mating surface of the rotary connector, the direct connection structure is more robust, and the sealing effect of the seal is better, effectively improving the oil pipe connection efficiency, improving the sealing effect, and ensuring the safety of equipment use. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the rotary connector 1 in this utility model; Figure 3 This is a schematic diagram of the structure of the first straight connector 2 in this utility model; Figure 4 yes Figure 1 Sectional view along the AA direction; Figure 5 This is an exploded structural diagram of the present invention.

[0016] Explanation of reference numerals in the attached drawings: Rotary connector 1, First straight connector 2, Second straight connector 3, First O-ring seal 4, Second O-ring seal 5, Positioning ball 6, Rotary seal 7, Oil inlet 11, Rotary head 12, Oil outlet 13, First inclined mating surface 14, First internal thread 15, Connector body 21, Rotating part 22, Seal ring mounting groove 23, Second inclined mating surface 24, Ball mounting groove 111, Rotary sealing groove 112 / Second internal thread 121, Positioning groove 122. Detailed Implementation

[0017] See Figures 1-5As shown, the technical solution adopted in this specific embodiment is as follows: It includes a rotary connector 1 and two identical straight connectors, a first straight connector 2 and a second straight connector 3. The rotary connector 1 has a hollow cavity structure, and the cavity is L-shaped. The end of the short cavity is the oil outlet port 13, and the long cavity is the oil inlet end 11. A rotary head 12 is installed inside the oil inlet end 11. The inner wall of the oil outlet port 13 is provided with a first internal thread 15. The first straight connector 2 is provided with an external thread 25 and is threadedly connected to the oil outlet port 13. The inner wall of the rotary head 12 is provided with a second internal thread 121 and is threadedly connected to the second straight connector 3. Traditional oil pipe connectors are mostly unthreaded structures, which are connected to the equipment oil pipe joint with a threaded fastening nut. The oil pipe joint has an external thread, and the oil pipe is installed by connecting the fastening nut to the oil pipe joint. However, when the fastening nut and the oil pipe joint are connected, problems easily occur. When the central axis of the fastening nut does not align with the central axis of the oil pipe connector, the connection becomes loose, leading to oil leakage. Furthermore, traditional connection methods require wrapping the oil pipe connector with PTFE tape to improve the sealing effect; however, in actual operation, the PTFE tape often breaks, and improper tightening of the fastening nut further contributes to oil leakage. Therefore, this embodiment adopts a direct connection structure with a rotary connector. The rotary connector has internal threads at both ends, while the direct connector has external threads. During the connection process, the threaded engagement of the direct connector and the rotary connector creates an expansion force, resulting in a connection strength far superior to the nut-driven connection method. This prevents leakage even without PTFE tape. Additionally, the direct connection structure reduces the likelihood of misalignment of the central axes during tightening, leading to higher connection efficiency.

[0018] More specifically, the lower end of the first internal thread 15 is provided with a first inclined mating surface 14, and one end of the first straight connector 2 is provided with a sealing ring mounting groove 23 near the opening. A first O-ring 4 is provided in the sealing ring mounting groove 23, and a second O-ring 5 is provided on the second straight connector 3. A second inclined mating surface 24 is provided on the side of the sealing ring mounting groove 23 away from the opening. The second inclined mating surface 24 and the first inclined mating surface 14 have the same inclination angle. In this embodiment, in addition to using the mating method of external thread on the inner ring and internal thread on the outer ring to improve the connection firmness and sealing performance, a sealing structure in which the inclined mating surface and the O-ring coincides are mated is also provided. Traditional sealing structures are mostly mated with a vertical surface and the O-ring coinciding, and the compressive force of the mating surface on the O-ring coinciding is limited. However, in this embodiment, the structure of the inclined mating surface mating with the O-ring coinciding is used. The tighter the O-ring coinciding is, the closer the contact between the O-ring coinciding and the inclined mating surface becomes, and the better the sealing effect. Thus, under the dual mating structure of direct connection and inclined sealing, the sealing performance of the connection can be effectively improved, and oil leakage can be prevented.

[0019] More specifically, the first straight connector 2 includes a connector body 21 and a rotating part 22. The rotating part 22 is an integral structure with the connector body 21 and is located near the middle of the connector body 21. The rotating part 22 has a regular hexagonal structure. The external thread 25 is located on the connector body 21. In this embodiment, the straight connector body is provided with an external thread. One end is used to connect with the rotating connector or the rotating head, and the other end is connected with the oil pipe end connector. The regular hexagonal rotating part is provided in the middle of the connector body to facilitate tightening the straight connector.

[0020] More specifically, the connection between the rotating head 12 and the oil inlet end 11 is provided with two sets of rotating sealing grooves 112, and rotating sealing rings 7 are provided on the rotating sealing grooves 112. There are also two rotating sealing rings 7. In this embodiment, in order to allow the rotating connector to rotate during the connection and adjust the connection direction of the straight connector, a rotating head with a sealing structure is provided, so that it can rotate and has a sealing effect.

[0021] More specifically, a positioning groove 122 is provided between the rotary sealing grooves 112, and two ball bearing mounting grooves 111 with internal threads are symmetrically provided on the oil inlet end 11. The ball bearing mounting grooves 111 are positioned corresponding to the positioning grooves 122, and positioning balls 6 are provided in the ball bearing mounting grooves 111. The positioning balls 6 are constrained in the ball bearing mounting grooves 111 by screws and are in rolling connection with the positioning grooves 122. In this embodiment, positioning balls are used to position and constrain the rotating head. After the positioning balls are installed in the ball bearing mounting grooves, they fall into the positioning grooves. Screws are screwed into the positioning grooves to constrain the positioning balls, thereby forming a grooved ball bearing structure. This structure will not loosen and can rotate easily, which is conducive to the installation of the direct connector. It can be installed in a compact space, improving installation efficiency.

[0022] The working principle of this utility model is as follows: During assembly and connection, the first O-ring 4 and the second O-ring 5 are first installed on the first straight connector 2 and the second straight connector 3, respectively. The first straight connector 2 is connected to the first internal thread 15 of the oil outlet port 13 through the external thread 25. During the rotation and tightening process, the second inclined mating surface 24 gradually contacts the first inclined mating surface 14. At the same time, the first O-ring 4 and the first inclined mating surface 14 are pressed together. Since the sealing connection is achieved by the inclined surface mating, the sealing effect is better than the traditional vertical surface sealing connection. Since the first straight connector 2 is rotated directly, the connection is more convenient and firm, and there will be no leakage caused by the deviation of the connection axis. The second straight connector 3 is connected to the rotating head 12 in the same way. At the same time, since the rotating head 12 is fixed by the positioning ball 6 and sealed to the oil outlet 11 through the rotating sealing ring 7, the rotating connector 1 can be rotated easily, thereby adjusting the installation direction of the first straight connector 2 and facilitating connection operations in different operating spaces.

[0023] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. An easy-to-install rotatable oil pipe connection assembly, characterized in that: It includes a rotary connector (1) and a first straight connector (2) and a second straight connector (3) with the same structure. The rotary connector (1) has a hollow cavity structure and the cavity is L-shaped. The end of the short cavity is the oil outlet port (13) and the long cavity is the oil inlet end (11). A rotary head (12) is provided inside the oil inlet end (11). The inner wall of the oil outlet port (13) is provided with a first internal thread (15). The first straight connector (2) is provided with an external thread (25). The first straight connector (2) is threadedly connected to the oil outlet port (13). The inner wall of the rotary head (12) is provided with a second internal thread (121). The rotary head (12) is threadedly connected to the second straight connector (3).

2. The easily installable rotatable oil pipe connection assembly according to claim 1, characterized in that: The lower end of the first internal thread (15) is provided with a first inclined mating surface (14).

3. The easily installable rotatable oil pipe connection assembly according to claim 1, characterized in that: The first straight connector (2) has a sealing ring mounting groove (23) near the opening at one end, and a first O-ring (4) is provided in the sealing ring mounting groove (23). The second straight connector (3) has a second O-ring (5).

4. A rotatable tubing connection assembly that is easy to install according to claim 3, characterized in that: The sealing ring mounting groove (23) is provided with a second inclined mating surface (24) on the side away from the opening, and the second inclined mating surface (24) has the same inclination angle as the first inclined mating surface (14).

5. A rotatable tubing connection assembly that is easy to install as in claim 1, wherein: The first straight connector (2) includes a connector body (21) and a rotating part (22). The rotating part (22) is an integral structure with the connector body (21) and is located near the middle of the connector body (21). The rotating part (22) is a regular hexagonal structure. The external thread (25) is located on the connector body (21).

6. A rotatable tubing connection assembly that is easy to install as in claim 1, wherein: The connection between the rotating head (12) and the oil inlet end (11) is provided with two sets of rotating sealing grooves (112), and rotating sealing rings (7) are provided on the rotating sealing grooves (112). There are also two rotating sealing rings (7).

7. The easily installable rotatable oil pipe connection assembly according to claim 6, characterized in that: A positioning groove (122) is provided between the rotary sealing grooves (112).

8. A rotatable tubing connection assembly that is easy to install as in claim 1, wherein: The oil inlet end (11) is symmetrically provided with two ball mounting grooves (111) with internal threads. The ball mounting grooves (111) are positioned corresponding to the positioning groove (122). Positioning balls (6) are provided in the ball mounting grooves (111). The positioning balls (6) are constrained in the ball mounting grooves (111) by screws and are in rolling connection with the positioning grooves (122).

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