Movable joint capable of preventing oil pipe from rotating together

Abstract

The utility model discloses a movable joint for preventing oil pipes from rotating together, which comprises a first sealing element and a second sealing element, a movable nut is movably sleeved on the first sealing element, and the first sealing element, the second sealing element and the movable nut are connected through a locking mechanism. The locking mechanism comprises a semicircular protrusion, a square male head, a semicircular groove and a square counter bore female head. The sealing device has the advantages that the square male head is machined on the first sealing piece, the square counter bore female head is machined on the second sealing piece, the two sealing pieces are inserted together, when the movable nut is screwed, the two sealing pieces cannot rotate or displace and can be better centered, the movable nut cannot drive the sealing pieces to rotate along with the movable nut, and the sealing effect is good. The protruding height of the square male head is smaller than the depth of the groove of the square counter bore female head, the sealing ring is matched, the situation that the sealing face cannot be sealed can be prevented, the structure is simple, manufacturing is convenient, installation and operation are labor-saving, and the risk of distortion, deformation and leakage of the movable joint connecting pipe is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic and pneumatic pipe fittings, in particular to a flexible joint which prevents oil pipes from rotating together. Background Art

[0002] A union, also known as a union or union, is a common pipe connector that allows for easy installation and disassembly. Socket unions come in both equal and reducing diameters. They are machined from round steel or ingots after die forging. They can be connected using either socket welding or threaded connections.

[0003] Generally, when tightening the union of hydraulic gas pipe fittings, the seal at one end of the union will rotate along with the live nut, causing the oil pipe connected to the seal to rotate together, causing the pipe to twist and deform, or even leak.

[0004] It should be noted that the above content falls within the technical knowledge of the inventor and does not necessarily constitute prior art. Utility Model Content

[0005] In view of the above defects, the present invention provides a flexible joint that prevents the oil pipe from rotating together, so as to solve the problem that the oil pipe is prevented from rotating together when the flexible joint is tightened.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A flexible joint for preventing an oil pipe from rotating together, comprising a first seal and a second seal, wherein a movable nut is movably mounted on the first seal, and the first seal, the second seal and the movable nut are connected by a locking mechanism;

[0008] The locking mechanism includes a semicircular protrusion, a square male head, a semicircular groove and a square countersunk female head. The semicircular protrusion is arranged at one inner end of the seal, the square male head is arranged at the front end of the semicircular protrusion, the semicircular groove is opened at the second inner end of the seal and matches the semicircular protrusion, and the square countersunk female head is arranged in the semicircular groove.

[0009] Furthermore, a sealing ring is installed in the movable nut.

[0010] Furthermore, the inner surfaces of the outer ends of the sealing member 1 and the sealing member 2 are respectively tapped with internal threads.

[0011] Furthermore, the outer surfaces of the two inner ends of the sealing member are tapped with external threads that engage with the movable nuts.

[0012] Furthermore, the protruding height of the square male head is smaller than the groove depth of the square countersunk female head.

[0013] The utility model provides a flexible joint that prevents the oil pipe from rotating together, and has the following beneficial effects: a square male head is processed on the first seal, and a square countersunk female head is processed on the second seal. The two seals are inserted together. When the loose nut is tightened, the two seals will not rotate and can be better aligned. The rotation of the loose nut will not drive the seal to rotate together, thereby avoiding rotational deformation of the pipeline;

[0014] The protruding height of the square male head is less than the groove depth of the square countersunk female head. Cooperating with the sealing ring, it can prevent the sealing surface from not sealing. It has a simple structure, is easy to manufacture, and saves labor in installation and operation, greatly reducing the risk of distortion and leakage of the flexible joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of a flexible joint for preventing the oil pipe from rotating together according to the present invention.

[0016] Figure 2 This is a cross-sectional view of the sealing member of the present invention.

[0017] Figure 3 This is a second cross-sectional view of the seal described in the present invention.

[0018] Figure 4 This is a cross-sectional view of the movable nut described in the utility model.

[0019] In the figure: 1. Seal 1; 2. Seal 2; 3. Live nut; 4. Semicircular protrusion; 5. Square male head; 6. Semicircular groove; 7. Square countersunk female head; 8. Sealing ring; 9. Internal thread; 10. External thread. DETAILED DESCRIPTION

[0020] The present invention will be described in detail below with reference to the accompanying drawings. Figure 1-4 As shown: a flexible joint for preventing the oil pipe from rotating together, comprising a seal 1 and a seal 2 2, a movable sleeve being provided on the seal 1 with a live nut 3, and the seal 1 1, the seal 2 2 and the live nut 3 being connected by a locking mechanism; the locking mechanism comprising a semicircular protrusion 4, a square male head 5, a semicircular groove 6 and a square countersunk female head 7, the semicircular protrusion 4 being arranged at the inner end of the seal 1, the square male head 5 being arranged at the front end of the semicircular protrusion 4, the semicircular groove 6 being opened at the inner end of the seal 2 2 and being matched with the semicircular protrusion 4, the square countersunk female head 7 being arranged in the semicircular groove 6; a sealing ring 8 is installed in the live nut 3; the inner surfaces of the outer ends of the seal 1 and the seal 2 2 are respectively tapped with internal threads 9; the outer surface of the inner end of the seal 2 2 is tapped with external threads 10 engaging with the live nut 3; the protruding height of the square male head 5 is less than the depth of the groove of the square countersunk female head 7

[0021] The working principle of this embodiment is as follows: the movable nut 3 is movably mounted on the seal 1, and the inner surfaces of the outer ends of the seal 1 and the seal 2 are respectively tapped with internal threads 9 for connecting to the external oil pipe;

[0022] During installation: the semicircular protrusion 4 is set at the inner end of the seal 1, the square male head 5 is set at the front end of the semicircular protrusion 4, the semicircular groove 6 is opened at the inner end of the seal 2, and is consistent with the semicircular protrusion 4, the square countersunk female head 7 is set in the semicircular groove 6, and a sealing ring 8 is installed in the live nut 3. The outer surface of the inner end of the seal 2 is tapped with an external thread 10 that engages with the live nut 3. The protruding height of the square male head 5 is less than the depth of the groove of the square countersunk female head 7. Figure 2 — Figure 4 As shown, a square male head 5 is processed on the semicircular protrusion 4 at the inner end of the seal 1, and a square countersunk female head 7 is processed on the semicircular groove 6 at the inner end of the seal 2. When installing, first insert the two seals together. When tightening the live nut 3, the two seals will not rotate and can be better aligned. The rotation of the live nut 3 will not drive the seal to rotate together, avoiding rotational deformation of the pipeline. Figure 1 As shown, the protruding height of the square male head 5 is smaller than the groove depth of the square countersunk female head 7. Cooperating with the sealing ring 8, it can prevent the sealing surface from failing to seal. It has a simple structure, is easy to manufacture, and saves labor in installation and operation, greatly reducing the risk of distortion and leakage of the flexible joint.

[0023] The above technical solutions only reflect the preferred technical solutions of the present utility model. Any changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the present utility model and fall within the scope of protection of the present utility model.

Claims

1. A flexible joint for preventing an oil pipe from rotating together, comprising a seal member 1 (1) and a seal member 2 (2), wherein a movable nut (3) is movably mounted on the seal member 1 (1), and characterized in that: The sealing member 1 (1), the sealing member 2 (2) and the movable nut (3) are connected via a locking mechanism; The locking mechanism comprises a semicircular protrusion (4), a square male head (5), a semicircular groove (6) and a square countersunk female head (7), wherein the semicircular protrusion (4) is arranged at the inner end of the first sealing member (1), the square male head (5) is arranged at the front end of the semicircular protrusion (4), the semicircular groove (6) is opened at the inner end of the second sealing member (2) and matches the semicircular protrusion (4), and the square countersunk female head (7) is arranged in the semicircular groove (6).

2. A flexible joint for preventing oil pipes from rotating together according to claim 1, characterized in that: A sealing ring (8) is installed in the movable nut (3).

3. A flexible joint for preventing oil pipes from rotating together according to claim 1, characterized in that: The inner surfaces of the outer ends of the sealing member 1 (1) and the sealing member 2 (2) are respectively tapped with internal threads (9).

4. A flexible joint for preventing oil pipes from rotating together according to claim 1, characterized in that: The outer surface of the inner end of the second sealing member (2) is tapped with an external thread (10) that engages with the movable nut (3).

5. A flexible joint for preventing oil pipes from rotating together according to claim 1, characterized in that: The protruding height of the square male head (5) is less than the groove depth of the square countersunk female head (7).

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