Pipe cap sealing device for pressurizing pressure vessel pipeline

Abstract

The invention relates to the technical field of pressure vessels, in particular to a pipe cap sealing device for pressurizing a pressure vessel pipeline, which comprises a pressure pipeline, a connecting rod is arranged at a pipe orifice at the upper end of the pressure pipeline, and one end of the connecting rod extends into the pressure pipeline and is fixedly connected with an inner conical ring; the other end of the connecting rod extends out of the pressure pipeline and is fixedly connected with an outer conical ring, the top end of the pressure pipeline is sleeved with a pipe cap, the inner sealing set and the outer sealing set are hung inside and outside the pressure pipeline through the connecting rod and kept at the same height, and then a nut connected with the pipe cap is rotated. The conical threaded groove and the conical threaded block on the pipe cap are meshed with the inner conical ring and the outer conical ring respectively, the pipe cap is fixed through interaction and extrusion of the pipeline, the pipe cap and the pressure pipeline are sealed through the sealing ring during extrusion, and the inner conical ring and the outer conical ring act on the pipeline in an extrusion mode through the structural form of the inner gasket and the outer gasket. And excessive extrusion deformation of the pipeline is avoided.

Description

Technical Field

[0001] This invention relates to the field of pressure vessel technology, specifically to a pipe cap sealing device for pressurizing pressure vessel pipelines. Background Technology

[0002] Pressure vessels are core equipment for industrial production, storage, and transportation of chemical media. Their safety and reliability are directly related to the stable operation of the production system and the safety of personnel and property.

[0003] Pressure testing, a core component of the manufacturing, installation, and inspection process of pressure vessels, is the "touchstone" for verifying the structural integrity, sealing, and pressure-bearing capacity of the equipment. It is crucial throughout the entire lifecycle of a pressure vessel and ensures its safe and reliable operation. Through hydrostatic or pneumatic testing, under conditions simulating or even exceeding the equipment's operating pressure, defects will show signs of leakage or deformation due to stress concentration, allowing for timely identification and repair. This process effectively prevents substandard equipment from entering the production process, fundamentally eliminating catastrophic accidents such as explosions and leaks caused by manufacturing defects. Paying close attention to and strictly implementing pressure testing procedures is of irreplaceable importance for maintaining the safety and stability of industrial production and promoting high-quality development in the industry.

[0004] In pressure testing, it is usually necessary to seal the pipe ends (plain pipes) without flanges. Generally, welded pipe caps are used. However, due to the welding and removal of the pipe caps, impurities such as welding slag and iron filings may leak into the pressure vessel, which cannot meet the equipment requirements. Therefore, it is necessary to propose a pipe cap sealing device for pressurizing pressure vessel pipelines. Summary of the Invention

[0005] To address the problems in the prior art, the present invention provides a pipe cap sealing device for pressurizing pressure vessel pipelines.

[0006] The technical solution adopted by this invention to solve its technical problem is: a pipe cap sealing device for pressurizing a pressure vessel pipeline, including a pressure pipeline, a connecting rod provided at the upper end of the pressure pipeline, one end of the connecting rod extending into the pressure pipeline and fixedly connected to an inner conical ring, the other end of the connecting rod extending out of the pressure pipeline and fixedly connected to an outer conical ring, a pipe cap fitted at the top of the pressure pipeline, a conical threaded groove opened at the lower opening of the pipe cap, a conical threaded block fixedly connected to the top of the inner end of the pipe cap, a rotating nut fixedly connected to the upper surface of the pipe cap, and annular grooves opened on the outer side wall of the inner conical ring and the inner side wall of the outer conical ring, with a sealing ring fixedly installed in the annular groove.

[0007] Specifically, the threads on the inner conical ring are arranged in a tapered thread with a larger upper diameter and a smaller lower diameter, and the inner conical ring is threadedly connected to the tapered thread block, and the outer wall of the inner conical ring abuts against the inner wall of the pressure pipe.

[0008] Specifically, the threads on the outer conical ring are tapered threads with a smaller upper diameter and a larger lower diameter, and the outer conical ring is threadedly connected to the tapered thread groove, and the inner wall of the outer conical ring abuts against the outer wall of the pressure pipeline.

[0009] Specifically, the inner and outer conical rings are arranged in several groups, and the several groups of inner and outer conical rings together form an inner sealing group and an outer sealing group arranged in a ring. Each group of inner and outer conical rings is fixedly connected by a connecting rod.

[0010] Specifically, the two sealing rings abut against the inner and outer walls of the pressure pipe, respectively.

[0011] The beneficial effects of the present invention are as follows: The pipe cap sealing device for pressurizing pressure vessel pipelines of the present invention suspends the inner sealing assembly and the outer sealing assembly inside and outside the pressure pipeline through a connecting rod and keeps them at the same height. Then, the nut connected to the pipe cap is rotated to make the tapered thread groove and tapered thread block on the pipe cap mesh with the inner tapered ring and the outer tapered ring respectively. Through interaction, the pipe is squeezed to fix the pipe cap. During the squeezing, the sealing ring achieves the seal between the pipe cap and the pressure pipeline. Moreover, by setting the structure of inner and outer double washers, the inner tapered ring and the outer tapered ring squeeze the pipeline, avoiding excessive squeezing deformation of the pipeline. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 A schematic diagram of the external structure of a pipe cap sealing device for pressurizing a pressure vessel pipeline provided by the present invention;

[0014] Figure 2 An internal sectional view of a pipe cap sealing device for pressurizing a pressure vessel pipeline provided by the present invention;

[0015] Figure 3 A bottom view of the pipe cap structure of a pipe cap sealing device for pressurizing pipelines of pressure vessels provided by the present invention;

[0016] Figure 4 A schematic diagram of the connection structure between the inner sealing group and the outer sealing group of a pipe cap sealing device for pressurizing a pressure vessel pipeline provided by the present invention;

[0017] Figure 5 This invention provides a schematic diagram of the connection structure between the inner conical ring, the outer conical ring, and the connecting rod of a pipe cap sealing device for pressurizing a pressure vessel pipeline.

[0018] In the diagram: 1. Pressure pipe; 2. Connecting rod; 3. Inner conical ring; 4. Outer conical ring; 5. Pipe cap; 6. Conical threaded groove; 7. Conical threaded block; 8. Rotating nut; 9. Annular groove; 10. Sealing ring. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0020] like Figures 1-5 As shown, the present invention provides the following technical solution:

[0021] Example 1: A pipe cap sealing device for pressurizing a pressure vessel pipeline includes a pressure pipeline 1. A connecting rod 2 is provided at the upper end of the pressure pipeline 1. One end of the connecting rod 2 extends into the pressure pipeline 1 and is fixedly connected to an inner conical ring 3. The other end of the connecting rod 2 extends out of the pressure pipeline 1 and is fixedly connected to an outer conical ring 4. A pipe cap 5 is fitted onto the top end of the pressure pipeline 1. A conical threaded groove 6 is opened at the lower end opening of the pipe cap 5. A conical threaded block 7 is fixedly connected to the top end inside the pipe cap 5. A rotating nut 8 is fixedly connected to the upper surface of the pipe cap 5. Annular grooves 9 are opened on the outer wall of the inner conical ring 3 and the inner wall of the outer conical ring 4. A sealing ring 10 is fixedly installed in the annular groove 9.

[0022] In use, first place the inner conical ring 3 inside the pressure pipe 1, then place the outer conical ring 4 outside the pressure pipe 1. Next, lower the inner conical ring 3 and outer conical ring 4, causing the connecting rod 2 to descend. The upper end of the connecting rod 2 abuts against the upper opening of the pressure pipe 1, thus suspending the inner conical ring 3 and outer conical ring 4 at the same height inside and outside the pressure pipe 1. Then, place other inner conical rings 3 and outer conical rings 4 in sequence, forming an inner sealing group and an outer sealing group. Next, place the pipe cap 5 over the top of the pressure pipe 1, and then rotate the pipe cap 5 by turning the nut 8. The pipe cap 5 will then drive the conical thread groove 6 and the conical thread block 7 to rotate. The conical thread groove 6 and the outer conical ring 4... The threaded connection compresses the outer conical ring 4 inward, and the conical threaded block 7 is threaded to the inner conical ring 3 and extends outward. Under the interaction force, the outer conical ring 4 and the inner conical ring 3 will fix the pipe cap 5 through the conical threaded groove 6 and the conical threaded block 7, thereby fixing the pipe cap 5 on the pressure pipeline 1. At the same time, the outer conical ring 4 and the inner conical ring 3 will compress the inside and outside of the pressure pipeline 1 through the sealing ring 10, thereby sealing the pressure pipeline 1 and avoiding excessive compression of the pressure pipeline 1. After use, the nut 8 is rotated in the opposite direction to remove the pipe cap 5, the conical threaded groove 6 and the conical threaded block 7. Then, the inner conical ring 3 and the outer conical ring 4 can be removed through the connecting rod 2 for subsequent use.

[0023] Example 2: The technical solutions in this example that differ from Example 1 include:

[0024] The inner conical ring 3 has a tapered thread with a larger upper diameter and a smaller lower diameter. The inner conical ring 3 is threadedly connected to the tapered threaded block 7, and the outer wall of the inner conical ring 3 abuts against the inner wall of the pressure pipe 1. The outer conical ring 4 has a tapered thread with a smaller upper diameter and a larger lower diameter. The outer conical ring 4 is threadedly connected to the tapered threaded groove 6, and the inner wall of the outer conical ring 4 abuts against the outer wall of the pressure pipe 1. Both the inner and outer conical rings 3 and 4 are arranged in several groups. These groups together form an annular inner and outer sealing group. After the tapered threaded block 7 is connected to the inner sealing group, the outer conical shape of the tapered threaded block 7 pushes the inner sealing group... In the sealing assembly, the inner conical ring 3 expands outward in an annular pattern and clamps against the inner wall of the pressure pipe 1. The conical thread groove 6 and the outer conical ring 4 contract inward through the inner conical shape of the conical thread groove 6 and clamp against the outer wall of the pressure pipe 1. Each set of inner conical rings 3 and outer conical rings 4 are fixedly connected by a connecting rod 2. The two sealing rings 10 abut against the inner and outer walls of the pressure pipe, respectively. The outer conical ring 4 and the inner conical ring 3 squeeze the inside and outside of the pressure pipe 1 through the sealing rings 10, thereby sealing the pressure pipe 1 and preventing excessive compression of the pressure pipe 1.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pipe cap sealing device for pressurizing a pressure vessel pipeline, comprising a pressure pipeline (1), characterized in that, A connecting rod (2) is provided at the upper end of the pressure pipe (1). One end of the connecting rod (2) extends into the pressure pipe (1) and is fixedly connected to an inner conical ring (3). The other end of the connecting rod (2) extends out of the pressure pipe (1) and is fixedly connected to an outer conical ring (4). A pipe cap (5) is fitted at the top of the pressure pipe (1). A conical thread groove (6) is opened at the lower end of the pipe cap (5). A conical thread block (7) is fixedly connected to the top of the inside of the pipe cap (5). A rotating nut (8) is fixedly connected to the upper surface of the pipe cap (5). An annular groove (9) is opened on the outer wall of the inner conical ring (3) and the inner wall of the outer conical ring (4). A sealing ring (10) is fixedly installed in the annular groove (9).

2. The pipe cap sealing device for pressurizing pressure vessel pipelines according to claim 1, characterized in that: The inner conical ring (3) has a tapered thread with a larger upper part and a smaller lower part. The inner conical ring (3) is threadedly connected to the tapered thread block (7), and the outer wall of the inner conical ring (3) abuts against the inner wall of the pressure pipe (1).

3. The pipe cap sealing device for pressurizing pressure vessel pipelines according to claim 1, characterized in that: The threads on the outer conical ring (4) are tapered threads with smaller upper diameter and larger lower diameter, and the outer conical ring (4) is threadedly connected to the tapered thread groove (6), and the inner wall of the outer conical ring (4) abuts against the outer wall of the pressure pipe (1).

4. A pipe cap sealing device for pressurizing pressure vessel pipelines according to claim 1, characterized in that: The inner conical ring (3) and the outer conical ring (4) are arranged in several groups. The several groups of inner conical rings (3) and outer conical rings (4) together form an inner sealing group and an outer sealing group arranged in a ring. Each group of inner conical rings (3) and outer conical rings (4) are fixedly connected by a connecting rod (2).

5. A pipe cap sealing device for pressurizing pressure vessel pipelines according to claim 1, characterized in that: The two sealing rings (10) abut against the inner and outer walls of the pressure pipe, respectively.

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