A non-destructive clamping and internal pressure testing device for soft thin-walled metal tubes

Abstract

This utility model discloses a non-destructive clamping internal pressure testing device for soft thin-walled metal tubes, comprising: a base with a test pipe connection seat at its bottom; a lower plug mounted on the upper part of the base; a column mounted on the base with a crossbeam on its upper part; an upper plug mounted on the crossbeam; and a placement position between the lower and upper plugs for mounting the tube to be tested. The base includes a connector with a first liquid passage extending from the bottom end face to the bottom top end face. A lower mounting position is provided on the bottom top end face, containing a first sealing ring. A test pipe mounting position is provided on the bottom top end face, containing a second sealing ring. The lower and upper plugs are used to compress and deform the conical sealing rings through a clamping sleeve, thereby achieving a seal on the tube to be tested. The inner plug provides internal support for the tube to be tested, effectively preventing damage to the tube during pressure testing.

Description

Technical Field

[0001] This utility model relates to the field of clamping structures, specifically to a non-destructive clamping internal pressure testing device for soft thin-walled metal tubes. Background Technology

[0002] For flexible, thin-walled pipes that need to withstand significant internal pressure, an internal pressure test is required to verify whether the material performance meets design specifications and to check for defects such as cracks. The test involves filling the pipe with liquid and pressurizing it to the test pressure to assess whether the pipe ruptures. In traditional production, O-rings are commonly used to seal the outer diameter of the pipe, or conical expansion plugs are used to seal the inside. The former has the disadvantage of poor sealing reliability, while the latter can cause pipe deformation due to the expansion plug, resulting in material waste. Utility Model Content

[0003] The purpose of this invention is to provide a non-destructive clamping internal pressure testing device for soft thin-walled metal tubes in order to solve the above-mentioned problems, thereby addressing the inconvenience of pressure testing for soft thin-walled metal tubes and the resulting damage to the metal tubes.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a non-destructive clamping internal pressure testing device for soft thin-walled metal tubes, comprising: a base with a test pipe connection seat at its bottom; a lower plug installed on the upper part of the base; a column installed on the base with a crossbeam on its upper part; an upper plug installed on the crossbeam; and a placement position between the lower plug and the upper plug for installing the tube to be tested.

[0005] As a further improvement to the above technical solution:

[0006] The base includes a connector, which has a first liquid passage hole extending from the bottom end face to the top end face. The top end face has a lower mounting position with a first sealing ring inside. The bottom end face has a test pipeline mounting position with a second sealing ring inside.

[0007] The lower plug includes a lower plug body, a lower sealing nut, a lower clamping sleeve, and a sealing ring assembly. The lower plug body is threadedly connected to the lower mounting position. The sealing ring assembly is installed inside the lower plug body. The lower clamping sleeve is installed above the sealing ring assembly. The lower sealing nut is threadedly connected to the lower plug body. By rotating the lower sealing nut, the lower clamping sleeve is moved, causing the sealing ring assembly to be compressed.

[0008] The lower plug body is provided with a lower inner plug, which is a hollow structure, and the lower end of the tube to be tested is supported outside the lower inner plug.

[0009] The upper plug includes an upper plug body, an upper sealing nut, an upper clamping sleeve, a sealing ring assembly, and an upper inner plug. The sealing ring assembly is installed inside the upper plug body, and the upper clamping sleeve is installed below the sealing ring assembly. The upper sealing nut is threadedly connected to the upper plug body. By rotating the upper sealing nut, the upper clamping sleeve is moved, causing the sealing ring assembly to be squeezed. The upper end of the tube to be tested is supported outside the upper inner plug.

[0010] The sealing ring assembly includes a first conical sealing ring and a second conical sealing ring installed in opposite directions.

[0011] The base is provided with several threaded holes, the column is threadedly engaged with the threaded holes, and the column is provided with several pin holes, in which pins are inserted.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] Non-destructive sealing protects the tube under test: Both the lower and upper plugs in this invention feature unique non-destructive sealing structures. By compressing the conical sealing ring with a clamping sleeve, a double seal is achieved between the lower and upper plug bodies and the tube under test. Simultaneously, the inner plug provides internal support for the tube under test, effectively preventing damage due to pressure during the pressure test, ensuring the integrity of the tube and the accuracy of the test results.

[0014] Simple structure and easy operation: This device mainly consists of a base, lower plug, upper plug, column, crossbeam, and pin. Its simple structure, few parts, and ease of assembly and disassembly make it easy to use. The lower plug is mounted on the base, and the upper plug is fixed by the column and crossbeam. Operators can flexibly adjust the position of the pin on the column according to the length of the tube to be tested, allowing for convenient and quick fixing of tubes of different lengths into the device for testing.

[0015] Safe and reliable, preventing accidents: This utility model incorporates safety protection measures, consisting of columns, a crossbeam, and pins. The columns have a row of evenly spaced pin holes, allowing for selection of appropriate hole positions based on the length of the tube to be tested. The crossbeam has three circular holes, which can simultaneously fit over two columns and the upper plug. The pins are inserted into the adjacent column holes above the crossbeam, effectively preventing the upper plug from dislodging due to excessive pressure during the pressure test, ensuring the safety of the operators and the smooth progress of the test.

[0016] Wide applicability and strong versatility: This device can be used for internal pressure testing of soft, thin-walled pipes of different lengths and specifications. By adjusting the position of the pin on the column, pipes of different lengths can be easily fixed; by replacing the plugs and sealing rings of different specifications, it can be adapted to test pipes of different specifications, demonstrating wide applicability and versatility.

[0017] Excellent sealing performance and accurate test results: The non-destructive sealing structure adopted by the lower and upper plugs, through the cooperation of the clamping sleeve and the conical sealing ring, achieves a good sealing effect and effectively prevents leakage of the test liquid. This ensures the stability and accuracy of the internal pressure of the pipe during the test, thereby improving the reliability and accuracy of the test results.

[0018] In summary, the non-destructive clamping internal pressure testing device for soft thin-walled pipes of this invention has the advantages of non-destructive sealing, simple structure, convenient operation, safety and reliability, wide applicability, and good sealing performance. It can effectively improve the efficiency and accuracy of internal pressure testing of soft thin-walled pipes and has important practical value and promotion significance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is one of the schematic diagrams of the internal structure of this utility model;

[0022] Figure 3 This is the second schematic diagram of the internal structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the base structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the lower plug structure of this utility model;

[0025] Figure 6 This is a schematic diagram of the upper plug structure of this utility model;

[0026] Figure 7 This is a schematic diagram of the sealing ring assembly structure of this utility model.

[0027] The reference numerals in the attached drawings are explained as follows: 1. Base; 100. Tube to be tested; 101. Connector; 102. First sealing ring; 103. Second sealing ring; 110. Lower sealing nut; 120. Upper sealing nut; 2. Lower plug; 201. Lower plug body; 202. Lower inner plug; 3. Upper plug; 301. Upper plug body; 302. Upper inner plug; 4. Column; 5. Crossbeam; 6. Pin; 7. First conical sealing ring; 8. Second conical sealing ring; 91. Lower clamping sleeve; 92. Upper clamping sleeve. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] like Figure 1 and Figure 2 As shown, the non-destructive clamping internal pressure testing device for soft thin-walled metal tubes in this embodiment includes: a base 1 with a test pipe connection seat at its bottom; a lower plug 2 installed on the upper part of the base 1; a column 4 installed on the base 1 with a crossbeam 5 on its upper part; an upper plug 3 installed on the crossbeam 5; and a placement position between the lower plug 2 and the upper plug 3 for installing the tube 100 to be tested. The base 1 has several threaded holes, and the column 4 is threaded into these holes. The column 4 also has several evenly spaced pin holes, each containing a pin 6. The pins can be installed at the selected hole position according to the length of the tube to be tested. The crossbeam 5 has three circular holes, which can simultaneously fit onto two columns 4 and the upper plug 3. The pin 6 is a cylindrical pin, inserted into the hole of the adjacent column 4 above the crossbeam 5 according to the actual installation height of the crossbeam 5. The pins and the crossbeam prevent the upper plug 3 from coming out. The test liquid enters the tube to be tested 100 through the test pipeline, base 1, and lower plug 2 to achieve internal pressure testing. The base 1 is used to install and connect other components, conduct test liquid, connect test pipeline, and fix this utility model on the workbench. The lower plug 2 is installed on the base 1 and its function is to seal the lower end of the tube to be tested 100 and conduct test liquid.

[0030] like Figure 3 and Figure 4 As shown, the base 1 includes a connector 101, which has a first fluid passage extending from the bottom end face to the top end face. The top end face has a lower mounting position containing a first sealing ring 102. The bottom end face also has a test pipeline mounting position containing a second sealing ring 103. The connector 101 has several threaded holes and through holes for mounting the column 4 and connecting to the worktable.

[0031] like Figure 5As shown, the lower plug 2 includes a lower plug body 201, a lower sealing nut 110, a lower clamping sleeve 91, and a sealing ring assembly. The lower plug body 201 is threadedly connected to the lower mounting position. The sealing ring assembly is installed inside the lower plug body 201, and the lower clamping sleeve 91 is installed above the sealing ring assembly. The lower sealing nut 110 is threadedly connected to the lower plug body 201. By rotating the lower sealing nut 110, the lower clamping sleeve 91 is moved, causing the sealing ring assembly to be compressed. A second liquid passage hole is provided inside the lower plug body 201. The outer surface of the lower sealing nut 110 is machined into a hexagon for easy clamping and tightening, and there is a through hole in the middle, slightly larger than the outer diameter of the tube to be tested 100. The inner hole of the lower clamping sleeve 91 is slightly larger than the outer diameter of the tube to be tested 100, and the lower outer diameter is clearance-fitted with the stepped hole of the lower plug body 201.

[0032] The lower plug body 201 is provided with a lower inner plug 202. The lower inner plug 202 is a hollow structure, and the lower end of the tube to be tested 100 is supported on the outside of the lower inner plug 202. The lower inner plug 202 is a round tubular part with an outer diameter slightly smaller than the inner diameter of the tube to be tested 100, and has a through hole inside.

[0033] like Figure 6 As shown, the upper plug 3 includes an upper plug body 301, an upper sealing nut 120, an upper clamping sleeve 92, a sealing ring assembly, and an upper inner plug 302. The sealing ring assembly is installed inside the upper plug body 301, and the upper clamping sleeve 92 is installed below the sealing ring assembly. The upper sealing nut 120 is threadedly connected to the upper plug body 301. By rotating the upper sealing nut 120, the upper clamping sleeve 92 is driven to move, causing the sealing ring assembly to be squeezed. The upper end of the tube to be tested 100 is supported outside the upper inner plug 302.

[0034] like Figure 7 As shown, the sealing ring assembly includes a first conical sealing ring 7 and a second conical sealing ring 8 installed in a crisscross pattern. The clamping sleeve compresses the first conical sealing ring 7 and the second conical sealing ring 8, deforming them and simultaneously sealing the lower (upper) plug body and the tube to be tested. At the same time, the inner plug provides internal support to the tube to be tested, preventing damage. Both the first conical sealing ring 7 and the second conical sealing ring 8 are made of polytetrafluoroethylene (PTFE). One end of the first conical sealing ring 7 has an outer conical surface, with its inner diameter slightly larger than the outer diameter of the tube to be tested. One end of the second conical sealing ring 8 has an inner conical surface, with its outer diameter slightly smaller than the countersunk hole of the lower plug body 201. Two pieces each of the first conical sealing ring 7 and the second conical sealing ring 8 are alternately installed in the countersunk hole. Then, the inner plug, clamping sleeve, and sealing nut are installed in sequence. The tube to be tested 100 is inserted into the inner hole of the plug. While tightening the sealing nut, the clamping sleeve compresses and deforms the conical sealing rings, thereby sealing the lower end of the tube to be tested. Due to the action of the inner plug, the tube to be tested 100 will not be deformed by compression.

[0035] This embodiment also discloses a method for using the non-destructive clamping internal pressure testing device for soft thin-walled metal tubes, including the following steps:

[0036] S1. Fix base 1 on the workbench and connect the test pipeline to the bottom of base 1;

[0037] S2. Install the lower plug 2, install the lower plug body 201 in the lower installation position, and install the sealing ring group, lower inner plug 202, lower clamping sleeve 91 and lower sealing nut 110 in sequence.

[0038] S3. Prepare the upper plug 3. Install the sealing ring assembly, lower inner plug 202, upper clamping sleeve 92 and upper sealing nut 120 into the lower plug body 201 in sequence.

[0039] S4. Insert the lower end of the tube to be tested 100 into the lower plug 2, and insert the upper plug 3 into the upper end of the tube to be tested 100.

[0040] S5. Align the upper hole of the crossbeam 5 with the column 4 and the upper plug 3 and insert them so that the lower surface of the crossbeam 5 presses against the upper plug 3. Then insert the pin 6 into the pin hole of the column 4.

[0041] Within the scope of the technology disclosed in this utility model, any variations or substitutions that can be easily conceived should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A non-destructive clamping internal pressure testing device for soft thin-walled metal tubes, characterized in that, include: The base (1) has a test pipeline connection seat at its bottom; The lower plug (2) is installed on the upper part of the base (1); A column (4) is installed on a base (1), and a crossbeam (5) is provided on its upper part; The upper end cap (3) is installed on the crossbeam (5); A placement position is provided between the lower plug (2) and the upper plug (3) for installing the tube to be tested (100).

2. The non-destructive clamping internal pressure testing device for soft thin-walled metal tubes according to claim 1, characterized in that: The base (1) includes a connector (101), the connector (101) is provided with a first liquid passage hole, the first liquid passage hole extends from the bottom end face to the bottom top end face, the bottom top end face is provided with a lower mounting position, the lower mounting position is provided with a first sealing ring (102), the bottom end face is provided with a test pipeline mounting position, the test pipeline mounting position is provided with a second sealing ring (103).

3. The non-destructive clamping internal pressure testing device for soft thin-walled metal tubes according to claim 2, characterized in that: The lower plug (2) includes a lower plug body (201), a lower sealing nut (110), a lower clamping sleeve (91), and a sealing ring assembly. The lower plug body (201) is threadedly connected to the lower mounting position. The sealing ring assembly is installed inside the lower plug body (201). The lower clamping sleeve (91) is installed above the sealing ring assembly. The lower sealing nut (110) is threadedly connected to the lower plug body (201). By rotating the lower sealing nut (110), the lower clamping sleeve (91) is driven to move, causing the sealing ring assembly to be squeezed.

4. The non-destructive clamping internal pressure testing device for soft thin-walled metal tubes according to claim 3, characterized in that: The lower plug body (201) is provided with a lower inner plug (202), which is a hollow structure, and the lower end of the tube to be tested (100) is supported outside the lower inner plug (202).

5. The non-destructive clamping internal pressure testing device for soft thin-walled metal tubes according to claim 4, characterized in that: The upper plug (3) includes an upper plug body (301), an upper sealing nut (120), an upper clamping sleeve (92), a sealing ring assembly, and an upper inner plug (302). The sealing ring assembly is installed inside the upper plug body (301), and the upper clamping sleeve (92) is installed below the sealing ring assembly. The upper sealing nut (120) is threadedly connected to the upper plug body (301). By rotating the upper sealing nut (120), the upper clamping sleeve (92) is driven to move, so that the sealing ring assembly is squeezed. The upper end of the tube to be tested (100) is supported outside the upper inner plug (302).

6. The non-destructive clamping internal pressure testing device for soft thin-walled metal tubes according to claim 5, characterized in that: The sealing ring assembly includes a first conical sealing ring (7) and a second conical sealing ring (8) installed in opposite directions.

7. The non-destructive clamping internal pressure testing device for soft thin-walled metal tubes according to claim 6, characterized in that: The base (1) is provided with several threaded holes, the column (4) is threadedly engaged with the threaded holes, the column (4) is provided with several pin holes, and a pin (6) is provided in the pin hole.

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