Sectional pressure vessel pressure test structure

Abstract

The utility model relates to a segmented pressure vessel pressure test structure. The segmented pressure vessel pressure test structure comprises a plurality of segmented shells, at least two pressure test end sockets and at least one annular half-tube pressure test tool, a pressure test allowance is reserved at the end part of each segmented shell, a half-pipe pre-welding piece is arranged at the position, close to the end part, of each segmented shell, and the annular half-pipe pressure test tool is configured to be welded on the corresponding half-pipe pre-welding pieces of the two adjacent segmented shells. The segmented pressure vessel pressure test structure can be used for respectively executing a hydraulic pressure test on each segmented shell and a folding welding seam between two adjacent segmented shells after folding welding, and the problems that water filling and water draining of a pressure vessel are difficult and the pressure vessel bears too heavy pressure after water filling are solved.

Description

Technical Field

[0001] The present application generally relates to the technical field of pressure vessel performance testing, and more specifically, to a segmented pressure vessel pressure testing structure for performing a water pressure test on a large pressure vessel. Background Art

[0002] During the assembly of pressure vessels, due to transportation restrictions, large pressure vessels need to be transported to the installation site in sections and assembled vertically in sections on site. Due to the large length of the pressure vessel, it is difficult to fill and drain the pressure vessel if a hydraulic test is performed on it, and the pressure vessel base may not be able to bear the overall weight of the pressure vessel after it is filled with water, making the hydraulic test difficult to implement.

[0003] In view of this, how to provide a structure suitable for performing a water pressure test on a large pressure vessel without damaging the pressure vessel base is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the present application provides a segmented pressure vessel pressure testing structure, which divides the water pressure test into multiple steps based on the segmented shell, solving the problems that the pressure vessel is difficult to fill and drain and bears excessive pressure after filling with water.

[0005] The present application provides a segmented pressure vessel pressure test structure, comprising: a plurality of segmented shells, at least two pressure test heads and at least one annular half-tube pressure test fixture; a pressure test margin is reserved at the end of each segmented shell, a half-tube pre-weld is arranged at a position close to the end of each segmented shell, and the annular half-tube pressure test fixture is configured to be welded on the corresponding half-tube pre-weld of two adjacent segmented shells; the steps of performing a water pressure test are as follows: welding the pressure test head to the end of each segmented shell, and performing a water pressure test on each segmented shell; cutting off the pressure test head and the pressure test margin, and closing and welding a plurality of segmented shells together; welding the annular half-tube pressure test fixture to the corresponding half-tube pre-weld of two adjacent segmented shells, and performing a water pressure test on the closed weld between the two adjacent segmented shells by using the annular space formed between the annular half-tube pressure test fixture and the two adjacent segmented shells; and cutting off the annular half-tube pressure test fixture and the half-tube pre-weld, and grinding to remove the cut marks.

[0006] Optionally, the number of pressure test heads is twice the number of segmented shells.

[0007] Optionally, the segmented pressure vessel pressure testing structure includes two pressure testing heads.

[0008] Optionally, the number of annular half-pipe pressure testing fixtures is one less than the number of segmented shells.

[0009] Optionally, the segmented pressure vessel pressure testing structure includes an annular half-tube pressure testing fixture.

[0010] Optionally, the pressure test margin forms a groove structure after being cut off.

[0011] Optionally, the total length of the pressure vessel is greater than 35 meters.

[0012] Compared with the prior art, the segmented pressure vessel pressure testing structure provided by the present application has the following beneficial effects:

[0013] Compared with the integral pressure vessel hydraulic test structure in the prior art, the segmented pressure vessel hydraulic test structure provided by the present application can divide the hydraulic test into two parts, and adopts a combination of the segmented shell hydraulic test in the factory and the hydraulic test of the weld after closing on site, so as to realize the hydraulic test of all parts of the large pressure vessel that needs to be transported in sections due to excessive length. In addition, the end of the segmented shell is reserved with a pressure test margin and a half-pipe pre-weld is arranged near the end, which avoids the welding defects that may be caused by the closing welding and hydraulic test of the segmented shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the present application, the implementation methods of the present application will be further illustrated and described based on the following drawings. These drawings are only used to more conveniently and specifically describe the implementation methods of the present application rather than to limit the present application.

[0015] Figure 1 is a structural schematic diagram of a segmented pressure vessel pressure test structure when performing a water pressure test on a segmented shell according to a preferred embodiment of the present application; and

[0016] Figure 2 It is a structural schematic diagram of a segmented pressure vessel pressure test structure when performing a water pressure test on a closing weld according to a preferred embodiment of the present application.

[0017] In the figure: 1 is the segmented shell, 2 is the pressure test head, 3 is the annular half-pipe pressure test fixture; 11 is the pressure test margin, and 12 is the half-pipe pre-weld. DETAILED DESCRIPTION

[0018] The present application provides a segmented pressure vessel pressure testing structure, which is suitable for performing segmented water pressure testing on large pressure vessels without causing difficulties in filling and draining water or damaging the base due to excessive water pressure.

[0019] In a preferred embodiment of the present application, a segmented pressure vessel pressure test structure is provided, comprising: a plurality of segmented shells 1, at least two pressure test heads 2 and at least one annular half-tube pressure test fixture 3; wherein a pressure test margin 11 is reserved at the end of each segmented shell 1, and a half-tube pre-weld 12 is provided at a position close to the end of each segmented shell 1, and the annular half-tube pressure test fixture 3 is configured to be welded to the corresponding half-tube pre-weld 12 of two adjacent segmented shells 1; the length of the pressure test margin 11 and the position of the half-tube pre-weld 12 can be reasonably set according to the segmented position and the closed position of the shell during the preparation of the segmented shell 1. Reference Figure 1 and Figure 2 The steps of performing a water pressure test using the segmented pressure vessel pressure test structure provided by the present application are as follows: Figure 1 As shown, after the segmented shell 1 is prepared and inspected, the pressure test head 2 is welded to the end of each segmented shell 1, and a water pressure test is performed on each segmented shell 1; after the water pressure test of each segmented shell 1 is completed, the pressure test head 2 and the pressure test margin 11 are cut off, and after all are completed, multiple segmented shells 1 are closed and welded together for the subsequent closing weld water pressure test step; further reference is made to Figure 2 After the closing and welding of multiple segmented shells 1 is completed, the annular half-pipe pressure test fixture 3 is welded to the corresponding half-pipe pre-welds 12 of two adjacent segmented shells 1, and the closed weld between the two adjacent segmented shells 1 is subjected to a water pressure test using the annular space formed between the annular half-pipe pressure test fixture 3 and the two adjacent segmented shells 1; after the water pressure test of the closed weld is completed, the annular half-pipe pressure test fixture 3 and the half-pipe pre-weld 12 are cut off and the cut marks are removed by grinding. The provision of the half-pipe pre-weld 12 avoids possible damage to the inner wall of the segmented shell 1 during the removal of the annular half-pipe pressure test fixture 3, and can improve the stability of the formed annular space, which is conducive to the safe implementation of the water pressure test; according to the above steps, a water pressure test is performed on the closed weld between every two adjacent segmented shells 1.

[0020] In a preferred embodiment of the present application, at least two pressure test heads 2 and at least one annular half-pipe pressure test fixture 3 can be prepared according to the number of segmented shells 1, so as to perform a water pressure test on each segmented shell 1 and the closing weld between every two segmented shells 1 after the segmented shells 1 are closed simultaneously or in sequence. In a specific embodiment, the number of pressure test heads 2 is twice the number of segmented shells 1, so as to perform a water pressure test on each segmented shell 1 at the same time. In an embodiment, the number of annular half-pipe pressure test fixtures 3 is one less than the number of segmented shells 1, so as to perform a water pressure test on the closing weld between every two segmented shells 1 at the same time. Preparing multiple pressure test heads 2 and multiple annular half-pipe pressure test fixtures 3 and performing a water pressure test at the same time can greatly reduce the time required to perform the test. In another specific embodiment, the segmented pressure vessel pressure test structure provided by the present application only includes two pressure test heads 2 and one annular half-pipe pressure test fixture 3, and the water pressure test is performed sequentially and singly, and such a structure and method saves preparation materials.

[0021] In a preferred embodiment of the present application, the pressure test margin 11 forms a groove structure after cutting off, so as to facilitate the subsequent closing welding between two adjacent segmented shells 1. In a preferred embodiment of the present application, the segmented pressure vessel pressure test structure provided by the present application is suitable for performing a water pressure test on a pressure vessel with a total length greater than 30 meters, 35 meters, 40 meters or 45 meters. In a specific embodiment of the present application, the total length of the pressure vessel is greater than 35 meters.

[0022] A large number of specific examples are provided in the embodiments provided herein, and it should be understood that these examples are only for the purpose of describing the embodiments of the present application in detail and are not intended to limit the present application. The embodiments in the present application can be practiced without these specific examples. In some embodiments, structures and / or technologies known to those skilled in the art are not shown in detail so as not to obscure the understanding of the present application.

[0023] Although the preferred embodiments of the present application have been shown and described herein, it is readily understood by those skilled in the art that these embodiments are provided by way of example only. Those skilled in the art will expect multiple changes, modifications and substitutions without departing from the present application. It should be understood that the various alternatives of the embodiments of the present application described herein are optionally used to implement the present application. It is intended to define the scope of the present application by the claims, and thus encompass structures and equivalents within the scope of these claims.

Claims

1. A segmented pressure vessel pressure testing structure, characterized in that: include: A plurality of segmented shells (1), at least two pressure test heads (2), and at least one annular half-pipe pressure test fixture (3); A pressure test margin (11) is reserved at the end of each segmented shell (1), and a half-pipe pre-weld (12) is provided at a position close to the end of each segmented shell (1), and the annular half-pipe pressure test fixture (3) is configured to be welded to the corresponding half-pipe pre-weld (12) of two adjacent segmented shells (1); The steps to perform a hydrostatic test are as follows: Welding the pressure test head (2) to the end of each segmented shell (1), and performing a water pressure test on each segmented shell (1); Cutting off the pressure test head (2) and the pressure test margin (11), and closing and welding the plurality of segmented shells (1) together; The annular half-pipe pressure test fixture (3) is welded to the corresponding half-pipe pre-welded parts (12) of the two adjacent segmented shells (1), and a water pressure test is performed on the closed weld between the two adjacent segmented shells (1) by utilizing the annular space formed between the annular half-pipe pressure test fixture (3) and the two adjacent segmented shells (1); as well as The annular half-pipe pressure test fixture (3) and the half-pipe pre-weld (12) are cut off and ground to remove the cut marks.

2. The segmented pressure vessel pressure testing structure according to claim 1 is characterized in that: The number of the pressure test heads (2) is twice the number of the segmented shells (1).

3. The segmented pressure vessel pressure testing structure according to claim 1 is characterized in that: The segmented pressure vessel pressure testing structure comprises two pressure testing heads (2).

4. The segmented pressure vessel pressure testing structure according to claim 1 is characterized in that: The number of the annular half-pipe pressure testing fixtures (3) is one less than the number of the segmented shells (1).

5. The segmented pressure vessel pressure testing structure according to claim 1 is characterized in that: The segmented pressure vessel pressure testing structure comprises an annular half-tube pressure testing tool (3).

6. The segmented pressure vessel pressure testing structure according to claim 1 is characterized in that: The pressure test margin (11) forms a groove structure after being cut off.

7. The segmented pressure vessel pressure testing structure according to claim 1 is characterized in that: The total length of the pressure vessel is greater than 35 meters.

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