Ball hinged pipe and pressure container

Abstract

A spherical hinge pipe and a pressure container relate to the technical field of pressure containers and comprise a limiter, a movable flange is connected to the limiter, a fastening flange is connected to the movable flange, a movable ball is spherically hinged between the movable flange and the fastening flange, a channel is arranged on the movable ball, and a connecting pipe is fixedly connected to a port, close to the fastening flange, of the channel. According to the utility model, the problem of leakage caused by failure of the connecting pipe due to the fact that the connecting pipe of the pressure vessel bears larger external load in all directions in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure vessels, in particular to a ball-jointed pipe and a pressure vessel. Background Art

[0002] At present, the pressure vessels used in the chemical production process, due to various process and structural requirements, enable the equipment to carry out normal operation, testing and maintenance, and inevitably set various openings and connect pipes on the shell and end cover, such as material inlet and outlet, measurement and control points (pressure gauge, temperature measuring buckle), sight glass, liquid level gauge, manhole and hand hole, etc.

[0003] As the existing devices are used, their shortcomings are gradually exposed, mainly in the following aspects:

[0004] The connecting pipes connecting the pressure vessel to the external pipeline are often subjected to the external pipeline's gravity, axial push-pull force or forces in other directions. Most of the connecting pipes in the prior art are welded to the pressure vessel. Therefore, the connecting pipes are always subjected to large external loads in all directions, which may lead to failure of the connecting pipes and leakage.

[0005] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0006] In view of the defects in the prior art, the utility model solves the problem in the traditional technology that the connecting pipe of the pressure vessel will be subjected to large external loads in all directions, thereby causing the connecting pipe to fail and leak.

[0007] In order to solve the above problems, the utility model provides the following technical solutions:

[0008] The ball-jointed tube comprises a stopper, the stopper is connected with a movable flange, the movable flange is connected with a fastening flange, a movable ball is spherically jointed between the movable flange and the fastening flange, and a channel is opened on the movable ball;

[0009] A connecting pipe is fixedly connected to a port of the channel close to the fastening flange.

[0010] As an optimized solution, a pre-tightening gap is provided between the movable flange and the fastening flange.

[0011] As an optimized solution, arc-shaped channels matching the movable ball are provided on the opposite ends of the movable flange and the fastening flange.

[0012] As an optimized solution, the limiter is provided with an inner hole for constraining the movable flange, and a step is provided at one end of the inner hole away from the movable flange, and the movable flange is connected to the step by a limit screw, and the outer diameter of the movable flange is smaller than the aperture of the inner hole.

[0013] As an optimized solution, a boss is provided on the side wall of the movable flange facing the fastening flange, and the fastening flange is connected to the boss by fastening bolts, the outer diameter of the boss is the same as the outer diameter of the fastening flange, the outer diameter of the boss is smaller than the inner diameter of the step, the distance from the boss to the outer wall of the movable flange is greater than the distance from the step to the inner hole, and the height of the step is higher than the height of the boss.

[0014] As an optimized solution, the arc-shaped channel of the movable flange is provided with first annular grooves in parallel, a first O-ring is arranged in the first annular groove, and the inner ring of the first O-ring abuts against the movable ball.

[0015] As an optimized solution, second annular grooves are arranged in parallel on the outer wall of the movable flange, a second O-ring is arranged in the second annular groove, and the outer ring of the second O-ring abuts against the inner hole.

[0016] As an optimized solution, a plurality of through holes are provided on the step and the fastening flange, corresponding thread grooves are provided on the movable flange and the boss, and the inner end of the limit screw or the fastening bolt passes through the through hole and is connected to the thread groove.

[0017] The utility model also discloses a pressure container, on which a ball-jointed pipe is fixed.

[0018] As an optimized solution, the pressure container is provided with an opening matching the outer wall of the limiter, and the outer wall of the limiter and the opening are welded and sealed.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] 1. The movable ball is fixed between the movable flange and the fastening flange, and the movable flange and the fastening flange are fixed by fastening bolts, so that the movable ball, the movable flange and the fastening flange become one, and there will be no relative displacement between them; the limit screw connects the limiter and the movable flange, and the outer diameter of the screw of the limit screw is smaller than the diameter of the light hole of the limiter. At the same time, a gap is set between the limiter and the movable flange. When there is a horizontal load, the movable ball, the movable flange and the fastening flange will produce axial displacement, thereby offsetting the load;

[0021] 2. By screwing the limit screw, adjust the depth of the limit screw into the threaded hole, thereby adjusting the range of axial movement of the movable flange. It is easy to adjust, no need to disassemble, and saves a lot of debugging costs;

[0022] 3. The inner wall of the movable flange and the fastening flange is an arc channel, and the movable ball can rotate freely. When the pipe is subjected to circumferential load, the pipe can continuously eliminate the circumferential load as the movable ball rotates;

[0023] 4. Through the detachable connection of the movable ball, if there is a problem with the pipe itself, the pipe and the movable ball can be replaced together. For equipment that needs to be inspected by a special inspection institute, there is no need to report it for inspection again; saving the inspection and welding costs;

[0024] 5. The directly welded pipe is optimized into a ball-jointed pipe that can rotate in a circle and allow axial displacement. The structural optimization avoids the generation of large pipe mouth loads to avoid failure of the pipe structure or seal caused by large pipe mouth loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0026] Figure 1 It is a schematic diagram of the structure of the utility model;

[0027] Figure 2 It is a schematic diagram of the utility model bearing horizontal load;

[0028] Figure 3 It is a schematic diagram of the utility model bearing horizontal and axial loads.

[0029] In the figure: 1-limiter; 2-movable flange; 3-fastening flange; 4-movable ball; 5-channel; 6-first O-ring; 7-second O-ring; 8-inner hole; 9-step; 10-boss; 11-preload gap; 12-limiting screw; 13-fastening bolt; 14-pipe connection; 15-pressure vessel; 16-outer ring of boss. DETAILED DESCRIPTION

[0030] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0031] like Figures 1 to 3 As shown, the ball-jointed tube includes a limiter 1, a movable flange 2 is connected to the limiter 1, a fastening flange 3 is connected to the movable flange 2, a movable ball 4 is spherically jointed between the movable flange 2 and the fastening flange 3, and a channel 5 is opened on the movable ball 4.

[0032] A pipe 14 is fixedly connected to the end of the channel 5 close to the fastening flange 3 .

[0033] An arc-shaped channel matching with the movable ball 4 is provided on the opposite ends of the movable flange 2 and the fastening flange 3 .

[0034] A boss 10 is provided on the side wall of the movable flange 2 facing the fastening flange 3 , and the fastening flange 3 is connected to the boss 10 by fastening bolts 13 .

[0035] An inner hole 8 for constraining the movable flange 2 is opened on the limiter 1, and a step 9 is provided at the end of the inner hole 8 away from the movable flange 2, and the movable flange 2 is connected to the step 9 by a limit screw 12. The limit screw 12 can move on the limiter 1, and the travel range of the movable flange 2 is limited by the boss outer ring 16 of the movable flange 2 and the head of the limit screw 12, and the step 9 can be stuck in the boss outer ring 16.

[0036] A pre-tightening gap 11 is provided between the movable flange 2 and the fastening flange 3 . The pre-tightening gap 11 can be appropriately larger to ensure that the movable ball 4 can be clamped when the fastening bolt 13 is tightened, thereby ensuring the sealing performance of the movable ball 4 .

[0037] The arc-shaped channel of the movable flange 2 is provided with first annular grooves in parallel, and a first O-ring 6 is arranged in the first annular groove. The inner ring of the first O-ring 6 abuts against the movable ball 4 .

[0038] Second annular grooves are arranged in parallel on the outer wall of the movable flange 2 , and a second O-ring 7 is arranged in the second annular groove. The outer ring of the second O-ring 7 abuts against the inner hole 8 .

[0039] The outer diameter of the boss 10 is smaller than the inner diameter of the step 9 , preferably smaller than 3 mm, that is, the distance W1 from the boss 10 to the outer wall of the movable flange 2 is larger than the distance W2 from the step 9 to the inner hole 8 .

[0040] The outer diameter of the boss 10 is the same as the outer diameter of the fastening flange 3 , the height of the boss 10 is 6 mm, and the height of the step 9 is higher than the height of the boss 10 , so the limiter 1 can make axial displacement relative to the movable flange 2 and the fastening flange 3 .

[0041] The outer diameter of the movable flange 2 is smaller than the diameter of the inner hole 8, and the difference in single-side distance between the two is 2 mm.

[0042] A plurality of through holes are arranged around the step 9 and the fastening flange 3 , and a corresponding thread groove is opened on the movable flange 2 , and the inner end of the limit screw 12 or the fastening bolt 13 passes through the through hole and is connected to the thread groove.

[0043] The utility model further discloses a pressure container. A ball-jointed tube is fixed on the pressure container 15. An opening matching the outer wall of the stopper 1 is provided on the pressure container. The outer wall of the stopper 1 and the opening are welded and sealed.

[0044] The assembly process of this device is:

[0045] First, the stopper 1 is welded to the cylinder of the pressure vessel 15, and then the second O-ring 7 is assembled into the outer groove of the movable flange 2, and then installed into the stopper 1 from the inside of the equipment, and at the same time, the stopper 1 and the movable flange 2 are assembled together by the stop screw 12 on the outside;

[0046] Install the first O-ring 6 into the movable flange 2, install the movable ball 4 into the movable flange 2, assemble the fastening flange 3 onto the movable flange 2 and tighten the fastening bolts 13 on the outside;

[0047] Finally, the pipe 14 is welded to the movable ball 4 through the groove, ensuring that the pipe 14 is aligned with the channel 5;

[0048] When the equipment is transported to the customer's site, the pipe 14 is connected to the pipeline. When the pipe 14 is subjected to the gravity, tension, or thrust of the pipeline, the pipe 14 rotates with the movable ball 4, thereby dissolving these external loads;

[0049] When subjected to horizontal axial force, the connecting pipe 14 pushes the movable ball 4, thereby causing the movable flange 2 and the fastening flange 3 to move toward the inside of the pressure vessel. Because the limit screw 12 can move axially in the light hole of the limiter 1, the movable flange 2 will be displaced relative to the limiter 1 until the head of the limit screw 12 is stuck on the limiter 1, thereby eliminating the horizontal load.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. Ball joint pipe, characterized by: The invention comprises a stopper (1), the stopper (1) is connected to a movable flange (2), the movable flange (2) is connected to a fastening flange (3), a movable ball (4) is spherically jointed between the movable flange (2) and the fastening flange (3), and a channel (5) is provided on the movable ball (4); A connecting pipe (14) is fixedly connected to the end of the channel (5) close to the fastening flange (3).

2. The ball joint pipe according to claim 1, characterized in that: A pre-tightening gap (11) is provided between the movable flange (2) and the fastening flange (3).

3. The ball joint pipe according to claim 1, characterized in that: An arc-shaped channel matching the movable ball (4) is provided on the opposite ends of the movable flange (2) and the fastening flange (3).

4. The ball joint pipe according to claim 1, characterized in that: The limiter (1) is provided with an inner hole (8) for constraining the movable flange (2); a step (9) is provided at one end of the inner hole (8) away from the movable flange (2); and the movable flange (2) is connected to the step (9) by a limit screw (12); the outer diameter of the movable flange (2) is smaller than the diameter of the inner hole (8).

5. The ball joint pipe according to claim 4, characterized in that: A boss (10) is provided on the side wall of the movable flange (2) facing the fastening flange (3), and the fastening flange (3) is connected to the boss (10) by means of a fastening bolt (13); the outer diameter of the boss (10) is the same as the outer diameter of the fastening flange (3); the outer diameter of the boss (10) is smaller than the inner diameter of the step (9); and the height of the step (9) is higher than the height of the boss (10).

6. The ball joint pipe according to claim 3, characterized in that: The arc-shaped channel of the movable flange (2) is provided with first annular grooves in parallel, a first O-ring (6) is arranged in the first annular groove, and the inner ring of the first O-ring (6) abuts against the movable ball (4).

7. The ball joint pipe according to claim 4, characterized in that: Second annular grooves are arranged in parallel on the outer wall of the movable flange (2), a second O-ring (7) is arranged in the second annular groove, and the outer ring of the second O-ring (7) abuts against the inner hole (8).

8. The ball joint pipe according to claim 5, characterized in that: The step (9) and the fastening flange (3) are surrounded by a plurality of through holes, the movable flange (2) is provided with a corresponding thread groove, and the inner end of the limit screw (12) or the fastening bolt (13) passes through the through hole and is connected to the thread groove.

9. A pressure vessel, characterized in that: A ball joint tube is fixed on the pressure vessel, and the ball joint tube is the ball joint tube as described in any one of claims 1 to 8.

10. The pressure vessel according to claim 9, characterized in that: The pressure container (15) is provided with an opening that matches the outer wall of the stopper (1), and the outer wall of the stopper (1) and the opening are welded and sealed.

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