Soft thin-wall metal pipe lossless clamping internal pressure test device and use method

Abstract

The invention discloses a soft thin-wall metal pipe lossless clamping internal pressure test device, which comprises a base, the bottom of which is provided with a test pipeline connecting seat; the lower plug is mounted at the upper part of the base; a cross beam is arranged at the upper part of the stand column; the upper plug is mounted on the cross beam; a placement position is arranged between the lower plug and the upper plug and is used for mounting a to-be-detected pipe. The base comprises a connector, the connector is provided with a first liquid passing hole, the first liquid passing hole extends from the lower end face of the bottom to the upper end face of the bottom, the upper end face of the bottom is provided with a lower installation position, a first sealing ring is arranged in the lower installation position, the lower end face of the bottom is provided with a test pipeline installation position, and a second sealing ring is arranged in the test pipeline installation position. The lower plug and the upper plug are adopted to press the conical sealing ring through the packing sleeve to enable the conical sealing ring to deform, and therefore sealing of the to-be-detected pipe is achieved. The inner plug supports the to-be-detected pipe from the inside, so that the to-be-detected pipe is effectively prevented from being damaged due to the pressure effect in the pressurization testing process.

Description

Technical Field

[0001] The present invention relates to the field of fixture structures, and particularly to a non-destructive clamping internal pressure test device for soft thin-walled metal pipes. Background Art

[0002] For soft thin-walled pipe working conditions that need to withstand a large internal pressure, in order to test whether the material performance meets the design indicators and whether there are defects such as cracks, an internal pressure test needs to be carried out. The test method is to fill the inside of the pipe with liquid and pressurize it to the test pressure to check whether the pipe bursts. In traditional production, an O-ring is often used to seal the outer diameter of the pipe, or a tapered expansion plug is used to seal the inside of the pipe. The disadvantage of the former is poor sealing reliability, and the disadvantage of the latter is that the expansion plug will cause deformation of the pipe, resulting in material waste. Summary of the Invention

[0003] The purpose of the present invention is to provide a non-destructive clamping internal pressure test device for soft thin-walled metal pipes to solve the problems of inconvenient pressure testing of soft thin-walled metal pipes and damage to the metal pipes.

[0004] To achieve the above purpose, the present invention provides the following technical solutions: A non-destructive clamping internal pressure test device for soft thin-walled metal pipes, comprising: a base, at the bottom of which there is a test pipeline connection seat; a lower plug, installed on the upper part of the base; a column, installed on the base, and at the upper part of which there is a cross beam; an upper plug, installed on the cross beam; a placement position is provided between the lower plug and the upper plug for installing the pipe to be detected.

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

[0006] The base includes a connector, the connector is provided with a first liquid passage hole, the first liquid passage hole extends from the bottom end face to the top end face, a lower installation position is provided on the top end face, a first sealing ring is arranged in the lower installation position, a test pipeline installation position is provided on the bottom end face, and a second sealing ring is arranged in the test pipeline installation position.

[0007] The lower plug includes a lower plug body, a lower sealing nut, a lower pressing sleeve and a sealing ring group; the lower plug body is threadedly connected to the lower installation position, the sealing ring group is installed in the lower plug body, the lower pressing sleeve is installed above the sealing ring group, and the lower sealing nut is threadedly connected to the lower plug body. By rotating the lower sealing nut, the lower pressing sleeve is driven to move, so that the sealing ring group is extruded.

[0008] A lower inner plug is arranged in the lower plug body, the lower inner plug is of a hollow structure, and the lower end of the pipe to be detected is supported outside the lower inner plug.

[0009] The upper plug includes an upper plug body, an upper sealing nut, an upper pressing sleeve, a sealing ring group, and an upper inner plug. The sealing ring group is installed inside the upper plug body. The upper pressing sleeve is installed below the sealing ring group. The upper sealing nut is threadedly connected to the upper plug body. By rotating the upper sealing nut, the upper pressing sleeve is driven to move, so that the sealing ring group is extruded. The upper end of the pipe to be detected is supported outside the upper inner plug.

[0010] The sealing ring group includes a first conical sealing ring and a second conical sealing ring installed in a positive and negative cross manner.

[0011] A number of threaded holes are provided on the base. The column is in threaded cooperation with the threaded holes. A number of pin holes are provided on the column, and pins are provided in the pin holes.

[0012] The present invention also discloses a method for using a non-destructive clamping internal pressure test device for a soft thin-walled metal pipe, including the following steps:

[0013] S1. Fix the base on the workbench and connect the test pipeline to the bottom of the base;

[0014] S2. Install the lower plug. Install the lower plug body at the lower installation position, and sequentially install the sealing ring group, the lower inner plug, the lower pressing sleeve, and the lower sealing nut;

[0015] S3. Prepare the upper plug. Install the sealing ring group, the lower inner plug, the upper pressing sleeve, and the upper sealing nut into the lower plug body in sequence;

[0016] S4. Insert the lower end of the pipe to be detected into the lower plug, and insert the upper plug into the upper end of the pipe to be detected;

[0017] S5. Align the holes on the crossbeam with the column and the upper plug at the same time and put it on, so that the lower plane of the crossbeam presses on the upper plug, and then insert the pin into the pin hole of the column.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] Non-destructive sealing and protection of the pipe to be detected: Both the lower plug and the upper plug adopted by the present invention have unique non-destructive sealing structures. By pressing the conical sealing ring with the pressing sleeve to make it deformed, double sealing of the lower and upper plug bodies and the pipe to be detected is realized. At the same time, the inner plug provides support for the pipe to be detected from the inside, effectively preventing the pipe to be detected from being damaged due to pressure during the pressure test, ensuring the integrity of the pipe to be detected and the accuracy of the test results.

[0020] Simple structure and convenient operation: The device mainly consists of a base, a lower plug, an upper plug, columns, crossbeams, pins, etc. It has a simple structure, few components, and is easy to assemble and disassemble. The lower plug is installed on the base, and the upper plug is fixed by columns and crossbeams. Operators can flexibly adjust the position of the pins on the columns according to the length of the pipe to be tested, and conveniently and quickly fix pipes of different lengths to be tested in the device for testing.

[0021] Safe and reliable, preventing accidents: The present invention is provided with safety protection measures, which are composed of columns, crossbeams and pins. A row of evenly spaced pin holes are machined on the columns, and appropriate hole positions can be selected according to the length of the pipe to be tested to install the pins; there are three circular holes on the crossbeam, which can be sleeved on 2 columns and the upper plug at the same time; the pins are inserted into the adjacent column holes above the crossbeam, effectively preventing the upper plug from coming off due to excessive pressure during the pressure test, ensuring the safety of operators and the smooth progress of the test.

[0022] Wide range of applications and strong versatility: The device can be applied to internal pressure tests of soft thin-walled pipes of different lengths and specifications. By adjusting the position of the pins on the columns, pipes of different lengths to be tested can be conveniently fixed; by replacing plugs and sealing rings of different specifications, it can adapt to pipes of different specifications for testing, with wide applicability and versatility.

[0023] Good sealing performance and accurate test results: The lower plug and the upper plug adopt a non-destructive sealing structure. Through the cooperation of the tightening sleeve and the conical sealing ring, a good sealing effect is achieved, effectively preventing the leakage of the test liquid. This ensures the stability and accuracy of the internal pressure of the pipe during the test, thus improving the reliability and accuracy of the test results.

[0024] In summary, the non-destructive clamping internal pressure test device for soft thin-walled pipes of the present invention has the advantages of non-destructive sealing, simple structure, convenient operation, safe and reliable, wide range of applications, good sealing performance, etc. It can effectively improve the efficiency and accuracy of the internal pressure test of soft thin-walled pipes, and has important practical value and popularization significance. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for description in the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is one of the schematic diagrams of the internal structure of the present invention;

[0028] Figure 3 This is the second schematic diagram of the internal structure of the present invention;

[0029] Figure 4 This is the schematic diagram of the base structure of the present invention;

[0030] Figure 5 This is the schematic diagram of the lower plug structure of the present invention;

[0031] Figure 6 This is the schematic diagram of the upper plug structure of the present invention;

[0032] Figure 7 This is the schematic diagram of the seal ring group structure of the present invention.

[0033] Explanation of the reference numerals in the drawings is as follows: 1. Base; 100. Pipe to be detected; 101. Connector; 102. First seal ring; 103. Second seal 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. Cross beam; 6. Bolt; 7. First conical seal ring; 8. Second conical seal ring; 91. Lower pressing sleeve; 92. Upper pressing sleeve. Specific embodiments

[0034] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other implementation manners obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope protected by the present invention.

[0035] Such as Figure 1 And Figure 2As shown in the figure, the non-destructive clamping internal pressure test device for soft thin-walled metal pipes in this embodiment includes: a base 1, with a test pipeline connection seat provided 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 cross beam 5 provided at its upper part; an upper plug 3, installed on the cross beam 5; a placement position is provided between the lower plug 2 and the upper plug 3 for installing the pipe 100 to be detected. A number of threaded holes are provided on the base 1, and the column 4 is in threaded cooperation with the threaded holes. A number of evenly spaced pin holes are provided on the column 4, and a plug 6 is provided in the pin holes, and the hole position can be selected according to the length of the pipe to be detected for installing the plug. There are three circular holes on the cross beam 5, which can be sleeved on 2 columns 4 and the upper plug 3 at the same time; the plug 6 is a cylindrical pin, and according to the actual installation height of the cross beam 5, it is inserted into the hole of the adjacent column 4 above the cross beam 5. The plug and the cross beam are used to prevent the upper plug 3 from coming out. The test liquid enters the pipe 100 to be detected through the base 1 and the lower plug 2 from the test pipeline, realizing the internal pressure test. The base 1 is used to install and connect other components, conduct the test liquid, connect the test pipeline and fix the present invention on the workbench. The lower plug 2 is installed on the base 1, and its function is to seal the lower end of the pipe 100 to be detected and conduct the test liquid.

[0036] As Figure 3 and Figure 4 shown in the figure, the base 1 includes a connector 101. The connector 101 is provided with a first liquid passing hole, and the first liquid passing hole extends from the bottom end face to the top end face. A lower installation position is provided on the top end face, and a first sealing ring 102 is provided in the lower installation position. A test pipeline installation position is provided on the bottom end face, and a second sealing ring 103 is provided in the test pipeline installation position. There are a number of threaded holes and through holes on the connector 101 for installing the column 4 and connecting with the workbench.

[0037] As Figure 5 shown in the figure, the lower plug 2 includes a lower plug body 201, a lower sealing nut 110, a lower pressing sleeve 91 and a sealing ring group; the lower plug body 201 is in threaded connection with the lower installation position, the sealing ring group is installed in the lower plug body 201, the lower pressing sleeve 91 is installed above the sealing ring group, and the lower sealing nut 110 is in threaded connection with the lower plug body 201. By rotating the lower sealing nut 110, the lower pressing sleeve 91 is driven to move, so that the sealing ring group is extruded. A second liquid passing hole is provided inside the lower plug body 201. The outer circular surface of the lower sealing nut 110 is processed into a hexagon for convenient clamping and tightening, and there is a through hole in the middle, which is slightly larger than the outer diameter of the pipe 100 to be detected. The inner hole of the lower pressing sleeve 91 is slightly larger than the outer diameter of the pipe 100 to be detected, and the outer diameter of the lower part is in clearance fit with the step hole of the lower plug body 201.

[0038] A lower inner plug 202 is provided inside the lower plug body 201. The lower inner plug 202 is of a hollow structure, and the lower end of the pipe 100 to be detected is supported outside the lower inner plug 202. The lower inner plug 202 is a round pipe-shaped part, with an outer diameter slightly smaller than the inner diameter of the pipe 100 to be detected, and there is a through hole inside.

[0039] As Figure 6 shown in the figure, the upper plug 3 includes an upper plug body 301, an upper sealing nut 120, an upper pressing sleeve 92, a sealing ring group, and an upper inner plug 302. The sealing ring group is installed inside the upper plug body 301, the upper pressing sleeve 92 is installed below the sealing ring group, and the upper sealing nut 120 is threadedly connected to the upper plug body 301. By rotating the upper sealing nut 120, the upper pressing sleeve 92 is driven to move, so that the sealing ring group is squeezed, and the upper end of the pipe 100 to be tested is supported outside the upper inner plug 302.

[0040] As Figure 7 shown in the figure, the sealing ring group includes a first tapered sealing ring 7 and a second tapered sealing ring 8 installed in a positive and negative cross manner. The pressing sleeve presses the first tapered sealing ring 7 and the second tapered sealing ring 8 to deform them, while sealing the lower (upper) plug body and the pipe to be tested. At the same time, the inner plug provides support for the pipe to be tested from the inside to prevent the pipe to be tested from being damaged. Both the first tapered sealing ring 7 and the second tapered sealing ring 8 are made of polytetrafluoroethylene. One end of the first tapered sealing ring 7 is provided with an outer conical surface, and its inner diameter is slightly larger than the outer diameter of the pipe to be tested. One end of the second tapered sealing ring 8 is provided with an inner conical surface, and its outer diameter is slightly smaller than the counterbore of the lower plug body 201. Two pieces of the first tapered sealing ring 7 and the second tapered sealing ring 8 are alternately installed in the counterbore, and then the inner plug, the pressing sleeve, and the sealing nut are installed in sequence. The pipe 100 to be tested is inserted into the inner hole of the plug. While tightening the sealing nut, the pressing sleeve squeezes the tapered sealing ring to deform, so as to realize the sealing of the lower port of the pipe to be tested. Due to the action of the inner plug, the pipe 100 to be tested will not be squeezed and deformed.

[0041] This embodiment also discloses a method for using a non-destructive clamping internal pressure test device for a soft thin-walled metal pipe, including the following steps:

[0042] S1. Fix the base 1 on the workbench and connect the test pipeline to the bottom of the base 1;

[0043] S2. Install the lower plug 2, install the lower plug body 201 in the lower installation position, and install the sealing ring group, the lower inner plug 202, the lower pressing sleeve 91, and the lower sealing nut 110 in sequence;

[0044] S3. Prepare the upper plug 3 and install the sealing ring group, the lower inner plug 202, the upper pressing sleeve 92, and the upper sealing nut 120 into the lower plug body 201 in sequence;

[0045] S4. Insert the lower end of the pipe 100 to be tested into the lower plug 2, and insert the upper plug 3 into the upper end of the pipe 100 to be tested;

[0046] S5. Align the holes on the cross beam 5 with the column 4 and the upper plug 3 at the same time and put them on, so that the lower plane of the cross beam 5 presses the upper plug 3, and then insert the pin 6 into the pin hole of the column 4.

[0047] Within the scope of the technology disclosed in the present invention, any changes or substitutions that can be easily conceived should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the said claims.

Claims

1. A non-destructive clamping internal pressure test device for a soft thin-walled metal tube, characterized in that Comprising: A base (1) with a test pipeline connection seat provided 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 cross beam (5) provided at its upper part; An upper plug (3) installed on the cross beam (5); A placement position is provided between the lower plug (2) and the upper plug (3) for installing the pipe to be tested (100).

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

3. The non-destructive clamping internal pressure test device for the soft thin-walled metal pipe according to claim 2, characterized in that: The lower plug (2) includes a lower plug body (201), a lower sealing nut (110), a lower pressing sleeve (91), and a sealing ring group. The lower plug body (201) is threadedly connected to the lower installation position. The sealing ring group is installed in the lower plug body (201). The lower pressing sleeve (91) is installed above the sealing ring group. The lower sealing nut (110) is threadedly connected to the lower plug body (201). By rotating the lower sealing nut (110), the lower pressing sleeve (91) is driven to move, so that the sealing ring group is squeezed.

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

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

6. The non-destructive clamping internal pressure test device for soft thin-walled metal pipes according to claim 5, characterized in that: The sealing ring group includes a first conical sealing ring (7) and a second conical sealing ring (8) installed in a cross - reverse manner.

7. The non-destructive clamping internal pressure test device for soft thin-walled metal pipes according to claim 6, characterized in that: A number of threaded holes are provided on the base (1). The column (4) is in threaded cooperation with the threaded holes. A number of pin holes are provided on the column (4), and pins (6) are provided in the pin holes.

8. A method for using a non-destructive clamping internal pressure test device for a soft thin-walled metal tube, based on the non-destructive clamping internal pressure test device for a soft thin-walled metal tube according to claim 7, characterized in that, Including the following steps: S1. Fix the base (1) on the workbench and connect the test pipeline to the bottom of the base (1); S2. Install the lower plug (2). Install the lower plug body (201) in the lower installation position, and sequentially install the sealing ring group, the lower inner plug (202), the lower pressing sleeve (91), and the lower sealing nut (110); S3. Prepare the upper plug (3). Install the sealing ring group, the lower inner plug (202), the upper pressing sleeve (92), and the upper sealing nut (120) into the lower plug body (201) in sequence; S4. Insert the lower end of the tube to be detected (100) into the lower plug (2), and insert the upper plug (3) into the upper end of the tube to be detected (100). S5. Align the holes on the cross beam (5) with the upright column (4) and the upper plug (3) simultaneously and slip them on, so that the lower plane of the cross beam (5) presses against the upper plug (3), and then insert the bolt (6) into the pin hole of the upright column (4).

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