High pressure flexible elbow

Abstract

The utility model discloses a high pressure movable elbow, including first elbow, second elbow, first elbow and second elbow are all L type, and the proximal end rotation and sealed connection of first elbow and second elbow, and the distal end rotation and sealed connection of first elbow and second elbow all have the adapter that is T type, and the outer wall of the both ends of the adapter away from first elbow or second elbow all is equipped with first outer thread, and one free end of the adapter is connected with the sealing cover through first outer thread, and the inner wall of the both ends of the adapter away from first elbow or second elbow all is equipped with first inner thread. If need to clean the inside of first elbow and second elbow, need not to take down first elbow and second elbow, only need to open both sides sealing cover, inject cleaning fluid from the side of adapter to the inside, and the cleaning fluid flows from the other side of adapter, thereby accomplishing the cleaning of first elbow and second elbow.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure elbow technology, specifically a high-pressure movable elbow. Background Technology

[0002] High-pressure flexible elbows are commonly used products in the petroleum machinery industry, oilfield well repair, cementing, fracturing operations, pipeline connection, and sand flushing.

[0003] High-pressure swivel elbows can all be rotated. However, the current high-pressure swivel elbows mainly have the following problems: (1) After the elbow is connected to the external pipeline, if the inside of the elbow needs to be cleaned, the elbow needs to be removed, which makes cleaning the inside of the elbow inconvenient; (2) The elbow is generally U-shaped, and the directions on both sides are fixed, that is, it can only connect to the pipeline in the same direction as the elbow, but cannot connect to the pipeline perpendicular to the elbow, resulting in a single connection direction of the pipeline. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a high-pressure movable elbow to solve the problems of difficulty in cleaning the inside of elbows and the single direction of pipe connection.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A high-pressure movable elbow includes a first elbow and a second elbow, both of which are L-shaped. The proximal ends of the first and second elbows are rotatable and sealed together. The distal ends of both the first and second elbows are rotatable and sealed together with a T-shaped adapter. The outer walls of the adapter at both ends away from the first or second elbow are provided with a first external thread. A sealing cap is connected to one free end of the adapter through the first external thread. The inner walls of the adapter at both ends away from the first or second elbow are provided with a first internal thread.

[0007] Preferably, the outer walls at both ends of the first elbow and the outer wall at the end of the second elbow away from the first elbow are each provided with a plurality of first annular protrusions, and the end faces at both ends of the first elbow and the end faces at the end of the second elbow away from the first elbow are each provided with a second annular protrusion. The cross-sections of the first and second annular protrusions are both semi-circular. The inner wall of the second elbow near the end of the first elbow and the inner wall of the adapter end are each provided with a plurality of first annular grooves, and the end faces of the second elbow near the end of the first elbow and the end faces of the adapter end are each provided with a plurality of second annular grooves. The cross-sections of the first and second annular grooves are both semi-circular. The first and second annular protrusions at the end of the first elbow are respectively rotatably connected to the first and second annular grooves at the end of the second elbow. The first and second annular protrusions at the ends of the first and second elbows that are far from each other are respectively rotatably connected to the first and second annular grooves of the two adapters.

[0008] In the above technical solution, the first elbow is rotatably connected to the first annular groove of the second elbow through multiple first annular protrusions. At the same time, the first elbow is also rotatably connected to the second annular groove of the second elbow through the second annular protrusions on its end face. This allows the first elbow to rotate within the second elbow while maintaining the sealing between the first elbow and the second elbow.

[0009] Preferably, the outer walls of the first elbow near the first annular protrusion at both ends and the outer walls of the second elbow near one end of the first elbow are provided with second external threads. Fastening sleeves are threadedly connected to the two second external threads of the first elbow and the second external threads of the second elbow. The inner wall of the fastening sleeve is stepped and is provided with a second internal thread that matches the second external threads. A first sealing ring is provided at both ends of the inner wall of the fastening sleeve.

[0010] In the above technical solution, after the first elbow is rotated to the desired position, the fastening sleeve is tightened, causing one end of the fastening sleeve to move towards the second elbow until one side of the fastening sleeve is threaded onto the second elbow and the other side is threaded onto the first elbow. This fastening sleeve secures the connection between the first and second elbows, maintaining their stability. Similarly, the fastening sleeves at the distal ends of the first and second elbows can also stably connect the two adapters to the first and second elbows. Furthermore, by providing two first sealing rings on the inner wall of the fastening sleeve, the sealing performance between the fastening sleeve and the connected components can be improved.

[0011] Preferably, a second sealing ring is provided on the inner wall of the second elbow near the end of the first elbow, and a third sealing ring is provided on each of the three inner walls of the adapter.

[0012] The above technical solution, through the inclusion of a second sealing ring, improves the sealing performance at the connection between the first and second elbows. The third sealing ring on the inner wall of the adapter further enhances the sealing performance between the adapter and the connected components.

[0013] Preferably, the inner wall of the sealing cap is provided with a fifth sealing ring.

[0014] The above technical solution improves the sealing performance between the sealing cover and the adapter by using the fifth sealing ring on the inner wall of the sealing cover.

[0015] Preferably, the adapter is fixedly connected to a first positioning ring at both ends away from the first bend or the second bend, and a second positioning ring that mates with the first positioning ring is fixedly connected to the sealing cover. The first positioning ring has multiple arc-shaped holes, and the second positioning ring has multiple positioning holes. The first positioning ring and the second positioning ring are connected by bolts, positioning holes, and arc-shaped holes.

[0016] In the above technical solution, after the sealing cap is threaded onto the adapter, a bolt is inserted into the positioning hole and the arc-shaped hole, and then a nut is tightened on the bolt so that the nut is pressed tightly against the first positioning ring. The diameter of the nut is larger than the width of the arc-shaped hole, thereby further connecting the sealing cap to the adapter and improving the stability and firmness of the sealing cap connection.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] (1) One end of the adapter is used to connect with the external pipeline, and the other end is sealed by the sealing cap. When both adapters are connected to the external pipeline, if it is necessary to clean the inside of the first elbow and the second elbow, there is no need to remove the first elbow and the second elbow. Just open the sealing caps on both sides and inject the cleaning liquid into the adapter from one side. The cleaning liquid flows out from the adapter on the other side, thus completing the cleaning of the first elbow and the second elbow.

[0019] (2) The adapter has two vertical free ends, which can be connected to pipes in different directions. Thus, depending on the actual situation, one free end of the adapter can be connected to the pipe and the other free end can be closed to improve the convenience of pipe installation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the present invention;

[0021] Figure 2 for Figure 1 A diagram showing the result after removing the sealing cap;

[0022] Figure 3 A schematic diagram showing the separation of the first and second elbows;

[0023] Figure 4 This is a cross-sectional view of the adapter;

[0024] Figure 5 This is a cross-sectional view of the present invention;

[0025] In the diagram: 1-First elbow, 2-Second elbow, 3-Adapter, 4-First external thread, 5-Sealing cap, 6-First internal thread, 7-First annular protrusion, 8-Second annular protrusion, 9-First annular groove, 10-Second annular groove, 11-Second external thread, 12-Fastening sleeve, 13-Second internal thread, 14-First sealing ring, 15-Second sealing ring, 16-Third sealing ring, 17-Fifth sealing ring, 18-First positioning ring, 19-Second positioning ring, 20-Arc-shaped hole, 21-Bolt. Detailed Implementation

[0026] 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.

[0027] Example 1

[0028] Please see Figure 1-5 A high-pressure flexible elbow includes a first elbow 1 and a second elbow 2, both L-shaped. The proximal ends of the first elbow 1 and the second elbow 2 are rotatably and sealingly connected. The distal ends of the first elbow 1 and the second elbow 2 are rotatably and sealingly connected to a T-shaped adapter 3. The outer walls of both free ends of the adapter 3 are provided with first external threads 4. One free end of the adapter is connected to a sealing cap 5 via the first external thread. The inner walls of the two ends of the adapter 3 furthest from the first elbow or the second elbow are provided with first internal threads 6. That is, one free end of the adapter 3 is connected to an external pipeline via the first internal thread 6, while the other free end is connected to the sealing cap 5. After both adapters 3 are connected to the external pipes, valves are usually installed on the external pipes on both sides. If it is necessary to clean the inside of the first elbow 1 and the second elbow 2, there is no need to remove the first elbow 1 and the second elbow 2. Just close the valves on the external pipes on both sides, then open the sealing caps 5 on both sides, inject cleaning fluid into the adapter 3 from one side, and the cleaning fluid flows out from the adapter 3 on the other side, thus completing the cleaning of the first elbow 1 and the second elbow 2.

[0029] In addition, the adapter 3 has two mutually perpendicular free ends, which can be connected to pipes in different directions, so that external pipes in different directions can be connected according to the actual situation.

[0030] The proximal ends of the first elbow 1 and the second elbow 2 are rotatably and sealed together, and the distal ends of the first elbow 1 and the second elbow 2 are rotatably and sealed together with a T-shaped adapter 3. Specifically, the outer walls at both ends of the first elbow 1 and the outer wall at the end of the second elbow 2 away from the first elbow are provided with multiple first annular protrusions 7. The end faces at both ends of the first elbow 1 and the end faces at the end of the second elbow 2 away from the first elbow are provided with a second annular protrusion 8. The cross-sections of the first annular protrusion 7 and the second annular protrusion 8 are both semi-circular. The inner wall of the second elbow 2 near the end of the first elbow and the inner wall at one end of the adapter 3 are provided with multiple first annular grooves 9. The end faces of the second elbow 2 near the end of the first elbow and the end faces of the inner walls at one end of the adapter 3 are provided with multiple second annular grooves 10. The cross-sections of the first annular groove 9 and the second annular groove 10 are both semi-circular. The first annular protrusion 7 and the second annular protrusion 8 at one end of the first elbow 1 are rotatably connected to the first annular groove 9 and the second annular groove 10 at one end of the second elbow 2, respectively; the first annular protrusion 7 and the second annular protrusion 8 at the far ends of the first elbow 1 and the second elbow 2 are rotatably connected to the first annular groove 9 and the second annular groove 10 of the two adapters 3, respectively.

[0031] The first elbow 1 is rotatably connected to the first annular groove 9 of the second elbow 2 via multiple first annular protrusions 7. At the same time, the first elbow 1 is also rotatably connected to the second annular groove 10 of the second elbow 2 via the second annular protrusions 8 on the end face. On the one hand, this allows the first elbow 1 to rotate within the second elbow 2 to adjust the angle between the first elbow and the second elbow. On the other hand, it maintains the sealing between the first elbow 1 and the second elbow 2.

[0032] The first elbow 1 has second external threads 11 on the outer walls near the first annular protrusion at both ends, and the second elbow 2 has second external threads 11 on the outer walls near one end of the first elbow. Fastening sleeves 12 are threaded onto the two second external threads of the first elbow 1 and the second external threads of the second elbow 2. The inner wall of the fastening sleeve 12 is stepped, meaning it is narrower on one side and wider on the other. The inner wall of the fastening sleeve 12 has second internal threads 13 that match the second external threads. First sealing rings 14 are provided at both ends of the inner wall of the fastening sleeve 12. When the first elbow 1 rotates along the second elbow 2 to the desired position, the fastening sleeve 12 is tightened, causing one end of the fastening sleeve 12 to move towards the second elbow 2 until one side of the fastening sleeve 12 is threaded onto the second elbow 2, and the other side is threaded onto the first elbow 1. This fastening sleeve 12 secures the connection between the first elbow 1 and the second elbow 2, maintaining their stability. Similarly, the two adapters 3 can be stably connected to the first elbow 1 and the second elbow 2 via the fastening sleeves 12 at their distal ends. In addition, by providing two first sealing rings 14 on the inner wall of the fastening sleeve 12, the sealing performance between the fastening sleeve 12 and the connected components can be improved.

[0033] The second elbow 2 has a second sealing ring 15 on its inner wall near the end of the first elbow, and the adapter 3 has a third sealing ring 16 on each of its three inner walls. The sealing cover 5 has a fifth sealing ring 17 on its inner wall. The second sealing ring 15 improves the sealing performance at the connection between the first elbow 1 and the second elbow 2. The third sealing ring 16 on the inner wall of the adapter 3 improves the sealing performance between the adapter 3 and the connected components. The fifth sealing ring on the inner wall of the sealing cover 5 improves the sealing performance between the sealing cover 5 and the adapter 3.

[0034] Example 2

[0035] Based on Embodiment 1, the two ends of the adapter 3 away from the first bend or the second bend are fixedly connected with a first positioning ring 18, and the sealing cover 5 is fixedly connected with a second positioning ring 19 that cooperates with the first positioning ring. The first positioning ring 18 has multiple arc-shaped holes 20, and the second positioning ring 19 has multiple positioning holes. The first positioning ring 18 and the second positioning ring 19 are connected by bolts 21, positioning holes, and arc-shaped holes.

[0036] After the sealing cap 5 is threaded onto the adapter 3, the bolt 21 is inserted into the positioning hole and the arc-shaped hole. Then, the nut is tightened on the bolt so that the nut presses tightly against the first positioning ring 18. The diameter of the nut is larger than the width of the arc-shaped hole 20. Through the cooperation of the nut and the bolt, the first positioning ring and the second positioning ring can be fixed together, thereby further connecting the sealing cap to the adapter and improving the stability and firmness of the sealing cap connection.

[0037] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art 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 appended claims and their equivalents.

Claims

1. A high-pressure movable elbow, characterized in that: Includes a first elbow (1) and a second elbow (2). Both the first elbow (1) and the second elbow (2) are L-shaped. The near ends of the first elbow (1) and the second elbow (2) are rotated and sealed together. The far ends of the first elbow (1) and the second elbow (2) are rotated and sealed together with a T-shaped adapter (3). The outer walls of the two free ends of the adapter (3) are provided with a first external thread (4). One free end of the adapter is connected to a sealing cap (5) through the first external thread. The inner walls of the two ends of the adapter (3) away from the first elbow or the second elbow are provided with a first internal thread (6).

2. A high-pressure movable elbow according to claim 1, characterized in that: Multiple first annular protrusions (7) are provided on the outer walls of both ends of the first elbow (1) and the outer wall of the second elbow (2) away from the first elbow. A second annular protrusion (8) is provided on the end face of both ends of the first elbow (1) and the end face of the second elbow (2) away from the first elbow. The cross-section of the first annular protrusion (7) and the second annular protrusion (8) is semi-circular. Multiple first annular grooves (9) are provided on the inner wall of the second elbow (2) near the end of the first elbow and the inner wall of the adapter (3). (3) Multiple second annular grooves (10) are provided on the end face of the inner wall of one end. The cross-section of the first annular groove (9) and the second annular groove (10) is semi-circular. The first annular protrusion (7) and the second annular protrusion (8) at one end of the first elbow (1) are respectively rotatably connected to the first annular groove (9) and the second annular groove (10) at one end of the second elbow (2). The first annular protrusion (7) and the second annular protrusion (8) at the far end of the first elbow (1) and the second elbow (2) are respectively rotatably connected to the first annular groove (9) and the second annular groove (10) of the two adapters (3).

3. A high-pressure movable elbow according to claim 2, characterized in that: The outer walls of the first elbow (1) near the first annular protrusion at both ends and the outer walls of the second elbow (2) near the first elbow at one end are provided with second external threads (11). Fastening sleeves (12) are threadedly connected to the two second external threads of the first elbow (1) and the second external threads of the second elbow (2). The inner wall of the fastening sleeve (12) is stepped. The inner wall of the fastening sleeve (12) is provided with a second internal thread (13) that matches the second external thread. The two ends of the inner wall of the fastening sleeve (12) are provided with first sealing rings (14).

4. A high-pressure movable elbow according to claim 3, characterized in that: The second elbow (2) has a second sealing ring (15) on the inner wall near the first elbow, and the adapter (3) has a third sealing ring (16) on each of its three inner walls.

5. A high-pressure movable elbow according to claim 4, characterized in that: The inner wall of the sealing cover (5) is provided with a fifth sealing ring (17).

6. A high-pressure movable elbow according to claim 5, characterized in that: The adapter (3) is fixedly connected to two ends away from the first bend or the second bend with a first positioning ring (18). The sealing cover (5) is fixedly connected to a second positioning ring (19) that cooperates with the first positioning ring. The first positioning ring (18) has multiple arc-shaped holes (20), and the second positioning ring (19) has multiple positioning holes. The first positioning ring (18) and the second positioning ring (19) are connected by bolts (21), positioning holes, and arc-shaped holes.

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