High-sealing-performance universal rotating joint for oil conveying pipeline

Abstract

The utility model relates to the field of pipeline connecting pieces, and discloses a high-sealing-performance oil pipeline universal rotating joint which comprises an upper connecting structure, a lower connecting structure is arranged at the lower end of the upper connecting structure, and movable grooves are formed in the center of the lower end face of the upper connecting structure and the center of the upper end face of the lower connecting structure respectively. The upper connecting structure comprises an upper connecting sleeve, a first through hole is formed in the center of the upper end face of the upper connecting sleeve, a rotating ball is arranged in a movable groove in the lower end face of the upper connecting sleeve, a connecting pipeline is fixedly connected to the center of the upper end face of the rotating ball, and the upper end of the connecting pipeline penetrates through the first through hole and is communicated to the upper end. According to the utility model, the sealing structure is arranged, the lower end of the upper connecting sleeve is inserted into the clamping groove, and the limiting rings on the two sides act on the two side walls of the upper connecting sleeve respectively, so that gaps generated during connection can be reduced, the sealing performance of the connection part is ensured, and oil leakage is avoided.

Description

Technical Field

[0001] This utility model relates to the field of pipe connectors, and in particular to a high-sealing universal rotary joint for oil pipelines. Background Technology

[0002] Oil pipeline systems are widely used in petrochemicals, offshore platforms, and long-distance inland pipelines. Due to the influence of factors such as thermal expansion and contraction, mechanical vibration, and terrain changes, universal rotary joints are required to achieve multi-degree-of-freedom compensation (such as axial expansion and contraction, radial offset, and angular deflection) to ensure the sealing and reliability of pipelines under complex working conditions.

[0003] However, existing rotary joints still have some shortcomings and areas for improvement in practical use. Existing universal rotary joints are prone to insufficient sealing and leakage during use and installation due to improper installation or loose tightening. Therefore, those skilled in the art provide a high-sealing universal rotary joint for oil pipelines to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-sealing universal rotary joint for oil pipelines. This joint utilizes multiple first springs and an upper gasket on the upper surface of the first threaded connecting pipe. During installation, the upper gasket is compressed, causing the multiple first springs at the lower end to deform. The threaded connection and the combined action of the multiple first springs ensure a tight seal at the connection. Simultaneously, a sealing ring is provided on the lower surface of the lower connecting sleeve. When the second threaded connecting pipe is connected, the sidewall of the sealing ring is precisely squeezed into the gap at the connection point through rotation, preventing oil leakage.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-sealing universal rotary joint for oil pipelines, comprising an upper connecting structure, a lower connecting structure at the lower end of the upper connecting structure, and movable grooves respectively provided at the center of the lower end face of the upper connecting structure and the center of the upper end face of the lower connecting structure. The upper connecting structure includes an upper connecting sleeve, a first through hole at the center of the upper end face of the upper connecting sleeve, the lower end of the first through hole penetrating the upper end face of the upper connecting sleeve and extending into the interior of the movable groove, and a... A rotating ball is fixedly connected to a connecting pipe at the center of its upper end face. The upper end of the connecting pipe passes through a first through hole and leads to the upper end, and a tightening nut is fixedly connected to its end. A first threaded connecting pipe is fixedly connected to the center of the upper end face of the tightening nut. A plurality of first positioning holes are provided at the center of the upper end face of the first threaded connecting pipe near the edge. A first spring is fixedly connected inside the plurality of first positioning holes. An upper washer is provided at the upper end of the first threaded connecting pipe. The upper ends of the plurality of first springs are fixedly connected to the lower end face of the upper washer.

[0006] The lower connecting structure includes a lower connecting sleeve, a second threaded connecting pipe is fixedly connected to the center of the lower end face of the lower connecting sleeve, and a sealing ring is fixedly connected to the lower end face of the lower connecting sleeve located outside the second threaded connecting pipe.

[0007] Through the above technical solution, by setting multiple first springs and upper gaskets on the upper end face of the first threaded connecting pipe, the upper gasket is squeezed during installation, and the multiple first springs at the lower end deform. Under the action of the threaded connection and the multiple first springs, the sealing of the connection can be guaranteed. At the same time, a sealing ring is set on the lower end face of the lower connecting sleeve. When the second threaded connecting pipe is connected, the side wall of the sealing ring is squeezed into the gap at the connection by rotation, thus preventing oil leakage.

[0008] Furthermore, a plurality of second positioning holes are provided at the center of the lower end face near the edge of the second threaded connecting pipe, and a second spring is fixedly connected inside the plurality of second positioning holes respectively. A lower washer is provided at the lower end of the second threaded connecting pipe, and the lower ends of the plurality of second springs are fixedly connected to the upper end face of the lower washer respectively.

[0009] With the above technical solution, when in use, the second threaded connecting pipe is connected to the conveying pipe. When rotating during installation, the lower gasket is squeezed, causing multiple second springs to contract simultaneously. When tightened in place, the stability and sealing of the connection are ensured by the action of the threaded connection and the action of multiple second springs on the lower gasket.

[0010] Furthermore, a sealing structure is provided between the lower connecting structure and the upper connecting structure. The sealing structure includes a slot, which is located on the upper end surface of the lower connecting sleeve near the edge. Multiple limiting rings are fixedly connected to the two inner sidewalls of the slot, and the lower end of the upper connecting sleeve is fitted into the inside of the slot.

[0011] By using the above technical solution, by inserting the lower end of the upper connecting sleeve into the inside of the slot, and by having multiple limiting rings on both sides act on the two side walls of the upper connecting sleeve, gaps generated during connection can be reduced, ensuring the sealing of the connection and preventing oil leakage.

[0012] Furthermore, the upper end face of the upper connecting sleeve is provided with a plurality of mounting holes near the edge. The lower ends of the plurality of mounting holes pass through the upper connecting sleeve and lead to the lower end respectively. Mounting bolts are provided in the plurality of mounting holes respectively. The lower ends of the plurality of mounting bolts pass through the plurality of mounting holes respectively, and the ends are threaded to the inside of the upper end face of the lower connecting sleeve respectively.

[0013] The above technical solution facilitates the connection and disassembly of the upper and lower connecting structures.

[0014] Furthermore, a second through hole is provided at the center of the lower inner wall of the movable groove on the upper end face of the lower connecting sleeve, and the lower end of the second through hole penetrates the lower inner wall of the movable groove and leads to the lower end;

[0015] The above technical solutions facilitate the transmission and delivery of oil inside the pipeline.

[0016] Furthermore, the limiting ring is made of rubber;

[0017] The above technical solution achieves good sealing and flexibility, preventing gaps from forming during connection.

[0018] This utility model has the following beneficial effects:

[0019] 1. In this utility model, by setting an upper connecting structure, by setting multiple first springs and upper gaskets on the upper end surface of the first threaded connecting pipe, during the installation process, the upper gaskets are squeezed, and the multiple first springs at the lower end are deformed. Under the action of the threaded connection and the multiple first springs, the sealing of the connection can be guaranteed. By cooperating with the lower connecting structure, the sealing and stability of the connection can be guaranteed when both ends are connected to the conveying pipeline.

[0020] 2. In this utility model, by setting a sealing structure, by inserting the lower end of the upper connecting sleeve into the inside of the slot, and by having multiple limiting rings on both sides act on the two side walls of the upper connecting sleeve respectively, the gaps generated during connection can be reduced, the sealing of the connection can be guaranteed, and oil leakage can be avoided. Attached Figure Description

[0021] Figure 1 This is a front view of a high-sealing universal rotary joint for oil pipelines proposed in this utility model;

[0022] Figure 2 This is an isometric view of a high-sealing universal rotary joint for oil pipelines proposed in this utility model;

[0023] Figure 3 This is an isometric view of a high-sealing universal rotary joint for oil pipelines proposed in this utility model from another perspective.

[0024] Figure 4 This is an isometric sectional view of a high-sealing universal rotary joint for oil pipelines proposed in this utility model;

[0025] Figure 5 for Figure 4 Enlarged diagram of point A in the middle.

[0026] Legend:

[0027] 1. Upper connecting structure; 101. Tightening nut; 102. Upper washer; 103. First spring; 104. First threaded connecting pipe; 105. Connecting pipe; 106. First through hole; 107. First positioning hole; 108. Upper connecting sleeve; 109. Rotating ball; 2. Lower connecting structure; 201. Second threaded connecting pipe; 202. Lower connecting sleeve; 203. Sealing ring; 204. Second through hole; 205. Lower washer; 206. Second spring; 207. Second positioning hole; 3. Mounting hole; 4. Mounting bolt; 5. Movable groove; 6. Sealing structure; 601. Slot; 602. Restricting ring. Detailed Implementation

[0028] 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.

[0029] Reference Figure 1-5This utility model provides an embodiment of a high-sealing universal rotary joint for oil pipelines, comprising an upper connecting structure 1, a lower connecting structure 2 at the lower end of the upper connecting structure 1, and movable grooves 5 respectively provided at the center of the lower end face of the upper connecting structure 1 and the center of the upper end face of the lower connecting structure 2. The upper connecting structure 1 includes an upper connecting sleeve 108, a first through hole 106 at the center of the upper end face of the upper connecting sleeve 108, the lower end of the first through hole 106 penetrating the upper end face of the upper connecting sleeve 108 and extending into the interior of the movable groove 5. A rotating ball 109 is provided inside the movable groove 5 on the lower end face of the upper connecting sleeve 108. A connecting pipe 105 is fixedly connected to the center of the upper end face. The upper end of the connecting pipe 105 passes through the first through hole 106 and leads to the upper end. A tightening nut 101 is fixedly connected to the end. A first threaded connecting pipe 104 is fixedly connected to the center of the upper end face of the tightening nut 101. A plurality of first positioning holes 107 are provided at the center of the upper end face of the first threaded connecting pipe 104 near the edge. A first spring 103 is fixedly connected to the inside of the plurality of first positioning holes 107 respectively. An upper washer 102 is provided at the upper end of the first threaded connecting pipe 104. The upper ends of the plurality of first springs 103 are fixedly connected to the lower end face of the upper washer 102 respectively.

[0030] The lower connecting structure 2 includes a lower connecting sleeve 202. A second threaded connecting pipe 201 is fixedly connected to the center of the lower end face of the lower connecting sleeve 202. A sealing ring 203 is fixedly connected to the lower end face of the lower connecting sleeve 202 located outside the second threaded connecting pipe 201. By setting multiple first springs 103 and an upper gasket 102 on the upper end face of the first threaded connecting pipe 104, the upper gasket 102 is compressed during installation, and the multiple first springs 103 at the lower end deform. Under the action of the threaded connection and the multiple first springs 103, the sealing of the connection can be guaranteed. At the same time, the sealing ring 203 is set on the lower end face of the lower connecting sleeve 202. When the second threaded connecting pipe 201 is connected, the side wall of the sealing ring 203 is just squeezed into the gap at the connection by rotation, so as to prevent oil leakage.

[0031] The second threaded connecting pipe 201 has multiple second positioning holes 207 at the center of its lower end face near the edge. A second spring 206 is fixedly connected inside each of the multiple second positioning holes 207. A lower washer 205 is provided at the lower end of the second threaded connecting pipe 201. The lower ends of the multiple second springs 206 are fixedly connected to the upper end face of the lower washer 205. By connecting the second threaded connecting pipe 201 to the conveying pipe, during rotational installation, the lower washer 205 is compressed, causing the multiple second springs 206 to contract simultaneously. When tightened to the correct position, the stability and sealing of the connection are ensured by the threaded connection and the action of the multiple second springs 206 on the lower washer 205.

[0032] A sealing structure 6 is provided between the lower connecting structure 2 and the upper connecting structure 1. The sealing structure 6 includes a groove 601, which is located on the upper end surface of the lower connecting sleeve 202 near the edge. Multiple limiting rings 602 are fixedly connected to the two inner side walls of the groove 601. The lower end of the upper connecting sleeve 108 is fitted into the inside of the groove 601. By inserting the lower end of the upper connecting sleeve 108 into the inside of the groove 601, the multiple limiting rings 602 on both sides act on the two side walls of the upper connecting sleeve 108, which can reduce the gaps generated during connection, ensure the sealing of the connection, and prevent oil leakage.

[0033] The upper end face of the upper connecting sleeve 108 is provided with a plurality of mounting holes 3 near the edge. The lower ends of the plurality of mounting holes 3 pass through the upper connecting sleeve 108 and lead to the lower end respectively. Mounting bolts 4 are provided in the plurality of mounting holes 3 respectively. The lower ends of the plurality of mounting bolts 4 pass through the plurality of mounting holes 3 respectively, and the ends are threaded to the interior of the upper end face of the lower connecting sleeve 202, so as to facilitate the connection and disassembly of the upper connecting structure 1 and the lower connecting structure 2.

[0034] A second through hole 204 is provided at the center of the lower inner wall of the movable groove 5 on the upper end surface of the lower connecting sleeve 202. The lower end of the second through hole 204 penetrates the lower inner wall of the movable groove 5 and leads to the lower end. The limiting ring 602 is made of rubber, which provides good sealing and flexibility, and avoids gaps during connection.

[0035] Working Principle: This utility model is a high-sealing universal rotary joint for oil pipelines. Multiple first springs 103 and an upper gasket 102 are installed on the upper end face of the first threaded connecting pipe 104. During installation, the upper gasket 102 is compressed, causing the multiple first springs 103 at the lower end to deform. The threaded connection and the action of the multiple first springs 103 ensure the sealing of the connection. Simultaneously, a sealing ring 203 is provided on the lower end face of the lower connecting sleeve 202. When the second threaded connecting pipe 201 is connected, the side wall of the sealing ring 203 is precisely squeezed into the gap at the connection point through rotation, preventing oil leakage. By connecting the second threaded connecting pipe 201 to the conveying pipe, when rotating during installation, the lower gasket 205 is compressed, causing multiple second springs 206 to contract simultaneously. When tightened to the correct position, the stability and sealing of the connection are ensured by the threaded connection and the action of multiple second springs 206 on the lower gasket 205. When connecting the upper connecting structure 1 and the lower connecting structure 2, the lower end of the upper connecting sleeve 108 is inserted into the slot 601. Multiple limiting rings 602 on both sides act on the two side walls of the upper connecting sleeve 108, which reduces the gaps generated during connection, ensures the sealing of the connection, and prevents oil leakage.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present 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 the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-sealing universal rotary joint for oil pipelines, comprising an upper connecting structure (1), wherein a lower connecting structure (2) is provided at the lower end of the upper connecting structure (1), and movable grooves (5) are respectively provided at the center of the lower end face of the upper connecting structure (1) and the center of the upper end face of the lower connecting structure (2), characterized in that: The upper connecting structure (1) includes an upper connecting sleeve (108). A first through hole (106) is provided at the center of the upper end face of the upper connecting sleeve (108). The lower end of the first through hole (106) penetrates the upper end face of the upper connecting sleeve (108) and leads to the interior of the movable groove (5). A rotating ball (109) is provided inside the movable groove (5) on the lower end face of the upper connecting sleeve (108). A connecting pipe (105) is fixedly connected at the center of the upper end face of the rotating ball (109). The upper end of the connecting pipe (105) penetrates the first through hole (106) and leads to the upper end. Furthermore, a tightening nut (101) is fixedly connected to the end, and a first threaded connecting tube (104) is fixedly connected to the center of the upper end face of the tightening nut (101). A plurality of first positioning holes (107) are provided at the center of the upper end face of the first threaded connecting tube (104) near the edge. A first spring (103) is fixedly connected inside the plurality of first positioning holes (107). An upper washer (102) is provided at the upper end of the first threaded connecting tube (104), and the upper ends of the plurality of first springs (103) are fixedly connected to the lower end face of the upper washer (102). The lower connecting structure (2) includes a lower connecting sleeve (202), a second threaded connecting pipe (201) is fixedly connected to the center of the lower end face of the lower connecting sleeve (202), and a sealing ring (203) is fixedly connected to the lower end face of the lower connecting sleeve (202) located outside the second threaded connecting pipe (201).

2. The universal rotary joint for high-sealing oil pipelines according to claim 1, characterized in that: The second threaded connecting pipe (201) has a plurality of second positioning holes (207) at the center of the lower end face near the edge. The interior of the plurality of second positioning holes (207) is fixedly connected to a second spring (206). The lower end of the second threaded connecting pipe (201) is provided with a lower washer (205). The lower ends of the plurality of second springs (206) are fixedly connected to the upper end face of the lower washer (205).

3. The universal rotary joint for high-sealing oil pipelines according to claim 1, characterized in that: A sealing structure (6) is provided between the lower connecting structure (2) and the upper connecting structure (1). The sealing structure (6) includes a groove (601). The groove (601) is provided on the upper end surface of the lower connecting sleeve (202) near the edge. Multiple limiting rings (602) are fixedly connected to the two inner side walls of the groove (601). The lower end of the upper connecting sleeve (108) is fitted and connected to the inside of the groove (601).

4. The universal rotary joint for high-sealing oil pipelines according to claim 1, characterized in that: The upper end face of the upper connecting sleeve (108) is provided with a plurality of mounting holes (3) near the edge. The lower ends of the plurality of mounting holes (3) pass through the upper connecting sleeve (108) and lead to the lower end respectively. The plurality of mounting holes (3) are provided with mounting bolts (4). The lower ends of the plurality of mounting bolts (4) pass through the plurality of mounting holes (3) respectively, and the ends are threaded to the interior of the upper end face of the lower connecting sleeve (202).

5. A high-sealing universal rotary joint for oil pipelines according to claim 1, characterized in that: A second through hole (204) is provided at the center of the lower inner wall of the movable groove (5) on the upper end surface of the lower connecting sleeve (202). The lower end of the second through hole (204) penetrates the lower inner wall of the movable groove (5) and leads to the lower end.

6. A high-sealing universal rotary joint for oil pipelines according to claim 3, characterized in that: The limiting ring (602) is made of rubber.

Images