Pipe welding-free pressure test device and working method thereof

Abstract

The invention is suitable for the technical field of pipe welding-free pressure testing, and provides a pipe welding-free pressure testing device and a working method thereof.The pipe welding-free pressure testing device comprises a placing assembly, and the top of the placing assembly is oppositely provided with a first plugging assembly and a second plugging assembly; a first detection assembly and a second detection assembly are arranged on the two sides of the first plugging assembly and the two sides of the second plugging assembly respectively, a pipe fitting assembly and a pressurizing assembly are arranged between the first plugging assembly and the second plugging assembly, the pipe fitting assembly comprises a first pipe body, and a second pipe body is arranged at one end of the first pipe body; a conical transition area is arranged between the first pipe body and the second pipe body and comprises a detection point A, a detection point B, a detection point C and a detection point D. A pressurization assembly is arranged to inject gas for pressurization testing, the gas can rapidly permeate, leakage appears, and the detection accuracy is improved. And the pressure resistance of the pipe fitting assembly is detected through the first visual detection mechanism and the second visual detection mechanism.

Description

Technical Field

[0001] This invention relates to the field of weld-free pressure testing technology for pipe fittings, and more specifically, to a weld-free pressure testing device for pipe fittings and its working method. Background Technology

[0002] With the development of production, different pipe diameters are needed to meet production requirements in actual production work. The production method of different pipe diameters is to apply axial pressure to one end or the middle section of the pipe, so that the pipe body gradually shrinks under the constraint of the mold to form a small diameter section, thereby realizing the pipe fitting with a smooth transition between different pipe diameters at both ends. After the pipe fitting is produced, the sealing and pressure resistance tests of the transition area of ​​the pipe fitting connection are also required. The existing testing method is generally a non-welding pressure test.

[0003] Weld-free pressure testing is a non-destructive pressure testing technology for pipe systems. Its core feature is that it uses weld-free connection methods, such as quick couplings, to build a test circuit, and applies and holds a specified pressure to the system to test its pressure resistance without relying on welding processes.

[0004] The existing weldless pressure testing device works by injecting liquid into the workpiece and then observing the surface of the pipe. If there are cracks or obvious plastic deformation on the surface of the pipe, the pressure resistance of the pipe is unqualified; otherwise, the pressure resistance of the pipe is good.

[0005] However, when the transition zone of the pipe fitting is a conical surface, the liquid will flow along the inclined surface due to gravity, which can easily cause visual errors and misjudgments. Furthermore, due to the influence of liquid flow marks, it is not easy to observe the surface cracks of the pipe fitting, which will affect the judgment of the test results. To address these issues, a non-welding pressure testing device for pipe fittings and its working method are proposed. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a pipe fitting pressure testing device without welding and its working method.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a pipe fitting pressure testing device without welding, comprising a placement component, wherein a first sealing component and a second sealing component are disposed opposite each other on the top of the placement component, a first detection component and a second detection component are disposed on both sides of the first sealing component and the second sealing component, and a pipe fitting component and a pressurizing component are disposed in the middle position of the first sealing component and the second sealing component.

[0008] The pipe assembly includes a first pipe body, a second pipe body is provided at one end of the first pipe body, and a tapered transition area is provided between the first pipe body and the second pipe body.

[0009] The conical transition zone includes detection point A, detection point B, detection point C, and detection point D.

[0010] The first sealing assembly includes a first sealing head for sealing the first pipe body.

[0011] The second sealing assembly includes a second sealing head for sealing the second pipe body.

[0012] The first detection component includes a first visual detection mechanism for detecting the tapered transition zone.

[0013] The second detection component includes a second visual detection mechanism for detecting the conical transition zone.

[0014] The present invention is further configured such that: the placement component includes a worktable, a first clamping mechanism is provided on the top of the worktable, and a second clamping mechanism is provided on one side of the first clamping mechanism.

[0015] The present invention is further configured such that: the second clamping mechanism includes a base, a first limiting member is provided on the top of the base, a second limiting member is provided above the first limiting member, the second tube is provided at the middle position between the second limiting member and the first limiting member, and the shapes of the second limiting member and the first limiting member are adapted to the shape of the second tube.

[0016] The present invention is further configured such that: a guide rail is provided on one side of the first limiting member, a sliding block is slidably connected to the middle position of the guide rail, the second limiting member is provided at the bottom of the sliding block, a telescopic cylinder is provided at the top of the guide rail, and the output end of the telescopic cylinder passes through the guide rail and is connected to the sliding block.

[0017] The present invention is further configured such that: the first sealing component further includes a first mounting bracket, the first mounting bracket is disposed on the top of the component, a first sealing cylinder is disposed on one side of the first mounting bracket, and the output end of the first sealing cylinder is connected to the first sealing head.

[0018] The present invention is further configured such that: the first detection component includes a support base, the support base is L-shaped, the support base is disposed on the top of the placement component, the first visual detection mechanism is disposed on one side of the support base, and the first visual detection mechanism corresponds to the tapered transition area of ​​the pipe component.

[0019] The present invention is further configured such that: the second sealing component includes a second mounting bracket, the second mounting bracket is disposed on the top of the component, a second sealing cylinder is disposed on one side of the second mounting bracket, and a second sealing head is disposed at the output end of the second sealing cylinder.

[0020] The present invention is further configured such that: the second detection component further includes an electric slide rail, the electric slide rail is disposed on the top of the placement component, the top of the electric slide rail is slidably connected to a mounting plate, the top of the mounting plate is symmetrically provided with two sets of limiting frames, each set of limiting frames is hinged with a set of adjusting cylinders inside, and the output ends of the two sets of adjusting cylinders are connected to adjusting plates.

[0021] The present invention is further configured such that: a mounting base is provided on the top of the adjusting plate, a rotary cylinder is provided on one side of the mounting base, a connecting plate is connected to the output end of the rotary cylinder, the connecting plate is L-shaped, and the second visual inspection mechanism is provided on one side of the connecting plate.

[0022] A welding method for a pipe fitting weld-free pressure testing device, using the pipe fitting weld-free pressure testing device as described above, includes the following steps:

[0023] S1. The pipe fitting assembly is placed in the position of the placement assembly by the robotic arm, and the placement assembly limits the pipe fitting assembly.

[0024] S2. After the pipe fitting assembly is placed, it is sealed by the first sealing assembly and the second sealing assembly respectively.

[0025] S3. After the pipe fitting assembly is sealed, gas is injected into it through the pressurization component to pressurize it and complete the pressure resistance test. The first detection component and the second detection component are then used to test it.

[0026] S4. After the pressure resistance test is completed, adjust the pressurization conditions and continue to test the airtightness of the pipe fittings that have passed the pressure resistance test.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] (1) Pressurization test is conducted by injecting gas through a pressurization component. The gas molecule volume is much smaller than that of liquid molecule, and it has stronger fluidity and permeability. Even the tiny gaps in the conical transition surface can be quickly penetrated by the gas and show leakage. The pressure resistance performance of the pipe component is tested by the first vision inspection mechanism and the second vision inspection mechanism.

[0029] (2) The position of the second vision inspection mechanism can be adjusted by the two sets of adjusting cylinders being in different states. When the two sets of adjusting cylinders are stable, the second vision inspection mechanism is placed horizontally. When the position of the two sets of adjusting cylinders changes, the second vision inspection mechanism follows the change, which can realize the change of different angles of the second vision inspection mechanism, making it convenient for the second vision inspection mechanism to perform point inspection on the pipe components.

[0030] (3) By setting the first clamping mechanism and the second clamping mechanism, the two ends of the pipe assembly can be limited and clamped, reducing the possibility of premature deformation of the pipe assembly during pressure testing. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a pipe fitting pressure testing device without welding and its working method according to the present invention.

[0032] Figure 2 for Figure 1 Isometric side view.

[0033] Figure 3 for Figure 1 Rear view.

[0034] Figure 4 This is a schematic diagram of the structure of the second clamping mechanism in this invention.

[0035] Figure 5 This is a schematic diagram of the structure of the second detection component in this invention.

[0036] Figure 6 This is a schematic diagram of the pipe fitting assembly in this invention.

[0037] Figure 7 This is a schematic diagram of the detection point structure in this invention.

[0038] Explanation of reference numerals in the attached drawings: 1. Placement component; 11. Worktable; 12. First clamping mechanism; 13. Second clamping mechanism; 131. Base; 132. First limiting member; 133. Second limiting member; 134. Sliding block; 135. Guide rail; 136. Telescopic cylinder;

[0039] 2. First sealing assembly; 21. First mounting bracket; 22. First sealing cylinder;

[0040] 3. First detection component; 31. Support base; 32. First vision inspection mechanism;

[0041] 4. Second sealing assembly; 41. Second mounting bracket; 42. Second sealing cylinder; 43. Second sealing head;

[0042] 5. Pipe assembly; 51. First pipe body; 52. Second pipe body;

[0043] 6. Second detection component; 61. Electric slide rail; 62. Mounting plate; 63. Limiting bracket; 64. Adjusting cylinder; 65. Adjusting plate; 66. Mounting base; 67. Rotary cylinder; 68. Connecting plate; 69. Second vision inspection mechanism;

[0044] 7. Pressurization components. Detailed Implementation

[0045] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0046] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0047] Please see Figures 1-7 The present invention provides the following technical solutions:

[0048] Example 1: In order to solve the problem of easy interference in the liquid injection pressure test of different pipe fittings, a welding-free pressure test device is set up to make the component suitable for pipe fitting testing.

[0049] First, the formation of the tapered transition zone is generally related to the size of the pipe fittings, that is, the sizes of the two pipe fittings are different, and a tapered transition zone is formed at the connection of the two pipe fittings.

[0050] The pipe fitting is specifically configured as pipe fitting assembly 5, and the specific structure of pipe fitting assembly 5 is as follows:

[0051] See Figure 6 The pipe assembly 5 includes a first pipe body 51, a second pipe body 52 is provided at one end of the first pipe body 51, and a tapered transition area is provided between the first pipe body 51 and the second pipe body 52.

[0052] Since the conical transition zone connects the first tube 51 and the second tube 52, and both the first tube 51 and the second tube 52 are hollow cylinders, and the diameter of the first tube 51 is smaller than the diameter of the second tube 52, the first tube 51, the second tube 52 and the conical transition zone form tubes of different sizes.

[0053] During the production process, due to the influence of the production method of the conical transition zone, it is necessary to conduct a non-welding pressure test on the pressure resistance of the conical transition zone.

[0054] Among them, pressure resistance mainly refers to whether the conical transition zone deforms under a certain pressure. That is, observe the surface of the pipe fitting during the pressure holding stage. If there is cracking or obvious plastic deformation on the surface of the pipe fitting, the pressure resistance of the pipe fitting is unqualified. Conversely, the pressure resistance of the pipe fitting is good.

[0055] See Figure 1 In the actual pressure test process, a placement component 1 is set below the pipe fitting assembly 5 to clamp and place the pipe fitting assembly 5. The specific structure of the placement component 1 is as follows:

[0056] See Figure 2 and Figure 3The placement component 1 includes a workbench 11, a first clamping mechanism 12 is provided on the top of the workbench 11, and a second clamping mechanism 13 is provided on one side of the first clamping mechanism 12.

[0057] See Figure 4 The second clamping mechanism 13 includes a base 131, a first limiting member 132 is provided on the top of the base 131, a second limiting member 133 is provided above the first limiting member 132, and a second tube 52 is provided in the middle position between the second limiting member 133 and the first limiting member 132. The shapes of the second limiting member 133 and the first limiting member 132 are adapted to the shape of the second tube 52.

[0058] See Figure 4 A guide rail 135 is provided on one side of the first limiting member 132, and a sliding block 134 is slidably connected to the middle position of the guide rail 135. The second limiting member 133 is provided at the bottom of the sliding block 134, and a telescopic cylinder 136 is provided at the top of the guide rail 135. The output end of the telescopic cylinder 136 passes through the guide rail 135 and is connected to the sliding block 134.

[0059] Among them, the tapered transition area of ​​the pipe assembly 5 is a stress concentration area. During the pressure test, the medium pressure will cause it to bulge radially or stretch axially. The first limiting member 132 and the second limiting member 133 are both made of flexible materials. By using the first limiting member 132 and the second limiting member 133 to flexibly constrain the pipe assembly 5, excessive deformation can be limited, reducing the possibility of premature deformation due to lack of constraint that may cover up potential defects.

[0060] The process by which the second clamping mechanism 13 limits the first tube 51 is as follows:

[0061] First, after the second tube 52 is placed in the position of the first limiting member 132, the telescopic cylinder 136 is activated. Under the drive of the telescopic cylinder 136, the sliding block 134 moves along the guide rail 135 above the second tube 52. At this time, the second limiting member 133 set at the bottom of the sliding block 134 contacts the upper surface of the second tube 52, and the second tube 52 is limited by the first limiting member 132 and the second limiting member 133.

[0062] The structure of the first clamping mechanism 12 is the same as that of the second clamping mechanism 13, and they have the same function. The first clamping mechanism 12 clamps the first tube 51 and makes corresponding adjustments according to the different sizes of the first tube 51, so that the first clamping mechanism 12 can limit the first tube 51.

[0063] The first clamping mechanism 12 and the second clamping mechanism 13 can limit and clamp both ends of the pipe assembly 5, reducing the possibility of premature deformation of the pipe assembly 5 during pressure testing.

[0064] After the pipe assembly 5 is limited by the first clamping mechanism 12 and the second clamping mechanism 13, it is also necessary to seal the pipe assembly 5 during the specific testing process. In order to achieve the purpose of sealing, the first sealing component 2 and the second sealing component 4 are set at both ends of the pipe assembly 5 to achieve the purpose of sealing. The first sealing component 2 and the second sealing component 4 respectively seal the first pipe body 51 and the second pipe body 52 to meet the sealing environment of the pressure testing device.

[0065] The specific structure of the first sealing component 2 is as follows:

[0066] See Figure 2 and Figure 3 The first sealing assembly 2 includes a first sealing head for sealing the first pipe body 51.

[0067] See Figure 2 and Figure 3 The first sealing component 2 also includes a first mounting bracket 21, which is disposed on the top of the component 1. A first sealing cylinder 22 is disposed on one side of the first mounting bracket 21, and the output end of the first sealing cylinder 22 is connected to the first sealing head.

[0068] The specific structure of the second sealing component 4 is as follows:

[0069] See Figure 2 and Figure 3 The second sealing assembly 4 includes a second sealing head 43 for sealing the second pipe body 52.

[0070] See Figure 2 and Figure 3 The second sealing component 4 includes a second mounting bracket 41, which is disposed on the top of the component 1. A second sealing cylinder 42 is disposed on one side of the second mounting bracket 41, and a second sealing head 43 is disposed at the output end of the second sealing cylinder 42.

[0071] The process of the first sealing component 2 sealing the first pipe body 51 is as follows:

[0072] After the pipe assembly 5 is placed in the first clamping mechanism 12 and the second clamping mechanism 13, the first sealing cylinder 22 is activated. The first sealing head is inserted into the inside of the first pipe body 51 under the drive of the first sealing cylinder 22. The first sealing head completes the sealing of the first pipe body 51. The first sealing head is adapted to the inner wall of the first pipe body 51 to achieve the sealing treatment of the first pipe body 51.

[0073] The sealing process of the second sealing component 4 on the second pipe body 52 is the same as the sealing process of the first sealing component 2 on the first pipe body 51. The second sealing head 43 is adapted to the inner wall of the second pipe body 52, and the second sealing head 43 can complete the sealing of the second pipe body 52.

[0074] After the first pipe body 51 and the second pipe body 52 are sealed by the first plug and the second plug 43 respectively, the pipe assembly 5 is in a sealed state. After the pipe assembly 5 is in a sealed state, the pressure testing device is pressurized by setting the pressure component 7.

[0075] The pressurizing assembly 7 is located below the pipe fitting assembly 5. The pressurizing assembly 7 includes a power pump set, a pressure regulating device, and connecting pipes. The power pump set provides power to the entire device. The pressure regulating device mainly includes a pressure gauge, a pressure regulating valve, and a pressure relief valve. The connecting pipes connect the pressurizing assembly 7 and the pipe fitting assembly 5. The pressurizing assembly 7 is used to provide a suitable pressure for the pressure testing device. In actual pressure testing, the pressure is mainly tested by inputting gas.

[0076] The connecting pipe of the pressurizing component 7 passes through the second pipe body 52. ​​The pressurizing component 7 can pressurize the interior of the pipe component 5 through the connecting pipe to meet the pressure test requirements.

[0077] The pressurization of the pipe fitting assembly 5 by the pressurization component 7 is mainly divided into two stages: slow pressurization and pressure holding. The staged pressurization mainly involves gradually increasing the pressure and holding the pressure briefly in each stage, during which the changes of the pipe fitting assembly 5 are detected. The pressure holding stage mainly involves holding the pressure for a long time after the test pressure is reached, during which the pipe fitting assembly 5 is monitored.

[0078] Pressurization tests were conducted by injecting gas through the pressurization component 7. Gas molecules are much smaller than liquid molecules and have stronger fluidity and permeability. Even the tiny gaps in the conical transition surface can be quickly penetrated by gas, causing leaks to appear.

[0079] In order to monitor changes in the pipe fitting assembly 5, a first detection component 3 is installed on one side of the pipe fitting assembly 5 to monitor its changes.

[0080] The specific structure of the first detection component 3 is as follows:

[0081] See Figure 2 and Figure 3 The first detection component 3 includes a first visual detection mechanism 32 for detecting the conical transition zone.

[0082] See Figure 2 and Figure 3 The first detection component 3 includes a support base 31, which is L-shaped and is located on the top of the placement component 1. The first visual detection mechanism 32 is located on one side of the support base 31 and corresponds to the tapered transition area of ​​the pipe component 5.

[0083] The first visual inspection unit 32 is a high-speed camera. The high-speed camera can detect the contour changes of the conical transition area of ​​the pipe component 5. At the same time, the high-speed camera can also detect the airflow. Its airflow detection principle is based on the combination of high-speed dynamic imaging and airflow visualization technology. By capturing the instantaneous details of airflow movement, it can analyze the airflow shape, speed, and leakage point characteristics.

[0084] To more intuitively observe the leakage of the pipe assembly 5, the pressurized gas in the pressurization assembly 7 is a colored inert gas, and the first visual detection mechanism 32 can detect changes in airflow.

[0085] The first visual inspection mechanism 32 can only inspect the side directly opposite to it. If the pipe component 5 on the side opposite to the first visual inspection mechanism 32 is deformed, it cannot be inspected by the first visual inspection mechanism 32 alone. Therefore, a second inspection mechanism 6 needs to be set on the side opposite to the first inspection mechanism 32 to inspect the other side of the pipe component 5.

[0086] The specific structure of the second detection component 6 is as follows:

[0087] See Figure 2 and Figure 3 The second detection component 6 includes a second visual detection mechanism 69 for detecting the conical transition zone.

[0088] Below the second vision inspection mechanism 69 is an electric slide rail 61. The working principle of the electric slide rail 61 is to use a motor to provide power, and through a reducer, synchronous belt and ball screw, the rotational motion of the motor is converted into linear motion, which drives the slider on the slide rail to move along the slide rail. The electric slide rail 61 can drive the second vision inspection mechanism 69 to move horizontally, which makes it easier for the second vision inspection mechanism 69 to adjust the distance between itself and the pipe fitting assembly 5, and makes it easier to pick up and drop the pipe fitting assembly 5.

[0089] When the second vision inspection mechanism 69 is located above the pipe assembly 5, the structure and function of the second vision inspection mechanism 69 are the same as those of the first vision inspection mechanism 32. The second vision inspection mechanism can detect the deformation on the opposite side of the first vision inspection mechanism 32. Through the cooperation of the second vision inspection mechanism 69 and the first vision inspection mechanism 32, the complete deformation detection of the pipe assembly 5 can be completed.

[0090] The deformation of pipe assembly 5 during the pressure test is divided into elastic deformation and plastic deformation. Elastic deformation is recoverable, while plastic deformation is irrecoverable. If the pipe diameter of pipe assembly 5 expands beyond the standard during the pressure test, it is judged as plastic deformation. If the pipe diameter of pipe assembly 5 does not exceed the standard during the pressure test, it can be observed after depressurization whether permanent deformation occurs and the pressure resistance performance is not up to standard. If the pipe assembly 5 returns to its original state after depressurization, elastic deformation has occurred and the pressure resistance is good.

[0091] The specific procedures for the pressure resistance performance testing of the pipe assembly 5 by the first visual inspection unit 32 and the second visual inspection unit 69 are as follows:

[0092] First, the pipe assembly 51 is positioned at the first clamping mechanism 12 and the second clamping mechanism 13 using a robotic arm. The first clamping mechanism 12 and the second clamping mechanism 13 are then activated to limit the movement of the second pipe body 52 and the first pipe body 51, respectively. Next, the first sealing cylinder 22 and the second sealing cylinder 42 are activated. The first sealing head and the second sealing head 43, driven by the first sealing cylinder 22 and the second sealing cylinder 42, respectively seal the first pipe body 51 and the second pipe body 52, creating a sealed environment for the pressure resistance test. Then, the pressurization component 7 is activated, and the pipe assembly 5 is pressurized in stages. The first visual inspection mechanism 32 and the second visual inspection mechanism 69 photograph and monitor the conical transition area of ​​the pipe assembly 5 after the pressurization begins, recording changes in the conical transition area. If a large amount of gas leakage occurs in the conical transition area... If any obvious cracks appear, or if significant deformation occurs in the conical transition area of ​​pipe assembly 5, or if a noticeable protrusion appears in the comparison of photographic monitoring by the first visual inspection mechanism 32 and the second visual inspection mechanism 69, or if the pipe diameter expands beyond the standard and undergoes plastic deformation, pressurization should be stopped immediately and the pressure should be slowly released through the pressure relief valve to allow pipe assembly 5 to slowly return to normal pressure. If neither of these two situations occurs after the pressure holding time ends, the pressure should continue to be slowly released through the pressure relief valve to allow pipe assembly 5 to return to normal pressure. The conical transition area of ​​pipe assembly 5 should then be inspected again by the first visual inspection mechanism 32 and the second visual inspection mechanism 69. If no obvious defects are found in the pipe, the pressure resistance performance of pipe assembly 5 is good; otherwise, the pressure resistance performance of pipe assembly 5 does not meet the standard, and the pressure resistance performance test of pipe assembly 5 is completed.

[0093] In Example 2, the pressure resistance test of the pipe assembly 5 is completed using the above structure. In practical applications, in addition to the pressure resistance test, the air tightness test is also required for the pipe assembly 5. The pressure of the pressure resistance test is usually much higher than the working pressure, and the purpose is to verify the structural strength of the pipe assembly 5. However, even if there are tiny gaps, gas leakage under high pressure may be masked by the large pressure difference. In actual operation, the pipeline may leak continuously due to tiny gaps under lower working pressure, affecting the normal operation of the system. Therefore, air tightness testing is required after the pressure resistance test.

[0094] In Embodiment 1, gas flow can be detected by the first visual detection mechanism 32. However, analyzing airflow changes solely through the first visual detection mechanism 32 cannot accurately pinpoint the leak location. For example, when leaks occur simultaneously at corresponding points on both sides of the conical transition zone, the airflow image captured by the first visual detection mechanism 32 only shows one set, making it impossible to accurately determine whether the leak is on the directly opposite side or the opposite side. Even when the detection results of the second visual detection mechanism 69 are superimposed, the leak location still cannot be determined. Therefore, the second detection component 6 is further designed to enable it to continue detecting other locations.

[0095] The specific structure of the second detection component 6 is as follows:

[0096] See Figure 5 The second detection component 6 also includes an electric slide rail 61, which is located on the top of the placement component 1. The top of the electric slide rail 61 is slidably connected to a mounting plate 62. Two sets of limit frames 63 are symmetrically arranged on the top of the mounting plate 62. Each set of limit frames 63 has a set of adjusting cylinders 64 hinged inside. The output ends of the two sets of adjusting cylinders 64 are connected to adjusting plates 65.

[0097] See Figure 5 The top of the adjusting plate 65 is provided with a mounting base 66, and a rotary cylinder 67 is provided on one side of the mounting base 66. The output end of the rotary cylinder 67 is connected to a connecting plate 68, which is L-shaped. The second vision inspection mechanism 69 is located on one side of the connecting plate 68.

[0098] Among them, both sets of regulating cylinders 64 are multi-stage regulating cylinders, which can achieve a long extension and retraction distance to meet the needs of testing work.

[0099] In practical applications, the position of the second vision detection mechanism 69 can be adjusted, and the adjustment process is as follows:

[0100] The position of the second vision inspection mechanism 69 can be adjusted by adjusting the two sets of cylinders 64 in different states. When the two sets of cylinders 64 are stable, the second vision inspection mechanism 69 is placed horizontally. When the position of the two sets of cylinders 64 changes, the second vision inspection mechanism 69 follows the change, which can realize the change of different angles of the second vision inspection mechanism 69, so as to facilitate the second vision inspection mechanism 69 to perform point inspection on the pipe assembly 5.

[0101] To facilitate better detection, the detection points in the conical transition zone are categorized based on their different locations. The specific categorization of the detection points is as follows:

[0102] See Figure 7 The conical transition zone includes detection points A, B, C, and D.

[0103] Detection points A and B are the detection positions on the left and right sides of the conical transition zone. Detection point A corresponds to the second detection component 6, and detection point B corresponds to the first detection component 3. Detection points C and D are the detection positions on the upper and lower sides of the conical transition zone.

[0104] Since the second vision inspection mechanism 69 needs to move during the inspection process, it can stay for a period of time to continuously take pictures and inspect each inspection point during the specific inspection process, thereby reducing the impact of airflow on the inspection results.

[0105] In addition, in actual data analysis, the comprehensive analysis of the detection results of the first vision detection agency 32 and the second vision detection agency 69 can corroborate the actual detection results and reduce the error of the detection results.

[0106] The inspection process for 69 pairs of inspection points A, C, and D by the second vision inspection agency is as follows:

[0107] First, start the electric slide rail 61. Driven by the electric slide rail 61, the mounting plate 62, limit frame 63, adjusting cylinder 64, adjusting plate 65, mounting base 66, rotating cylinder 67, connecting plate 68 and second vision detection mechanism 69 are moved horizontally to the position of detection point C, and the upper side of the conical transition area is photographed to complete the photographing and detection of detection point C.

[0108] After the detection at point C is completed, the electric slide rail 61 is started in reverse. Driven by the electric slide rail 61, the second vision detection mechanism 69 moves away from the detection point C. At this time, the rotary cylinder 67 is started, and the connecting plate 68 and the second vision detection mechanism 69 rotate 180° under the drive of the rotary cylinder 67. Then, the two sets of adjusting cylinders 64 are started respectively. Driven by the two sets of adjusting cylinders 64, the adjusting plate 65, the mounting base 66, the rotary cylinder 67, the connecting plate 68, and the second vision detection mechanism 69 move vertically downward. The electric slide rail 61 is started again, and the second vision detection mechanism 69 moves to the position of the detection point D under the drive of the electric slide rail 61. Then, the second vision detection mechanism 69 takes a picture of the lower side of the conical transition area, completing the picture detection of the detection point D.

[0109] After the detection at point D is completed, the electric slide rail 61 is restarted. Driven by the electric slide rail 61, the second vision detection mechanism 69 moves away from the conical transition area. One set of adjusting cylinders 64 is activated to extend, and the position of the other set of adjusting cylinders 64 is adjusted appropriately. The two sets of adjusting cylinders 64 are in a state of one high and one low. Under the adjustment of the two sets of adjusting cylinders 64, the second vision detection mechanism 69 is aligned with the detection point A. The electric slide rail 61 is restarted, and the second vision detection mechanism 69 moves closer to the detection point A. The second vision detection mechanism 69 takes a picture of the detection point A, completing the detection of the detection point A.

[0110] Through the above-mentioned shooting and detection, the detection results of detection points A, C and D can be obtained. During the detection process, the second vision detection mechanism 69 can be adjusted in position under the drive of two sets of adjusting cylinders 64. For the detection position, a second photo can be taken to supplement the undetected position, reducing the error caused by missed shooting. Multiple data references can more accurately determine the location of the leak.

[0111] Example 3: A method for operating a pipe fitting weld-free pressure testing device, comprising the following steps:

[0112] S1. The pipe fitting assembly 5 is placed in the position of the placement assembly 1 by the robotic arm, and the placement assembly 1 limits the pipe fitting assembly 5.

[0113] S11. After the pipe assembly 5 is placed in the positions of the first clamping mechanism 12 and the second clamping mechanism 13 by the robotic arm, the first clamping mechanism 12 and the second clamping mechanism 13 are activated respectively to limit the first pipe body 51 and the second pipe body 52.

[0114] S2. After the pipe fitting assembly 5 is placed, it is sealed by the first sealing assembly 2 and the second sealing assembly 4 respectively.

[0115] S21. After the first tube 51 and the second tube 52 are placed in the first clamping mechanism 12 and the second clamping mechanism 13, the first sealing cylinder 22 and the second sealing cylinder 42 are activated respectively. The first sealing head is inserted into the inside of the first tube 51 under the drive of the first sealing cylinder 22, and the first sealing head completes the sealing of the first tube 51. The second sealing head 43 is inserted into the inside of the second tube 52 under the drive of the second sealing cylinder 42, and the second sealing head 43 completes the sealing of the second tube 52.

[0116] S3. After the pipe fitting assembly 5 is sealed, it is pressurized by injecting gas through the pressurization assembly 7 to complete the pressure resistance test, and then tested by the first detection assembly 3 and the second detection assembly 6.

[0117] S31. After the first pipe body 51 and the second pipe body 52 are sealed by the first sealing head and the second sealing head 43 respectively, the pipe assembly 5 is in a sealed state.

[0118] S32. Start pressurization component 7 and pressurize pipe component 5 in sections through pressurization component 7.

[0119] S33, the first visual inspection mechanism 32, and the second visual inspection mechanism 69 take pictures and monitor the conical transition area of ​​the pipe assembly 5 after the inflation starts, and record the changes in the conical transition area of ​​the pipe assembly 5.

[0120] S34. If a significant protrusion appears in the comparison of the photo monitoring of the first visual inspection agency 32 and the second visual inspection agency 69, and the pipe diameter expands beyond the standard and plastic deformation occurs, in any of the above situations, pressurization should be stopped in time and the pressure should be slowly released through the pressure relief valve so that the pipe assembly 5 can slowly return to the normal pressure state.

[0121] S35. After the pressure holding time ends, if neither of the above two situations occurs in the pipe fitting assembly 5, continue to slowly release pressure through the pressure relief valve to restore the pipe fitting assembly 5 to the normal pressure state. Continue to inspect the conical transition area of ​​the pipe fitting assembly 5 through the first visual inspection mechanism 32 and the second visual inspection mechanism 69. If no obvious defects are found in the pipe fitting, the pressure resistance performance of the pipe fitting assembly 5 is good; otherwise, the pressure resistance performance of the pipe fitting assembly 5 does not meet the standard, and the pressure resistance performance test of the pipe fitting assembly 5 is completed.

[0122] S4. After the pressure resistance test is completed, adjust the pressurization conditions and continue to test the airtightness of the pipe fitting assembly 5 that has passed the pressure resistance test.

[0123] S41. After the pressure resistance test is completed, adjust the pressurization conditions and continue to inject gas into the pipe assembly 5 through the pressurization component 7.

[0124] S42. Start the first visual inspection mechanism 32 to inspect the airflow at inspection point B.

[0125] S43. Start the electric slide rail 61. Driven by the electric slide rail 61, the mounting plate 62, limit frame 63, adjusting cylinder 64, adjusting plate 65, mounting base 66, rotating cylinder 67, connecting plate 68 and second vision detection mechanism 69 are moved horizontally to the position of detection point C, and the upper side of the conical transition area is photographed to complete the photographing and detection of detection point C.

[0126] After detection at point C is completed, the electric slide rail 61 is activated in reverse. Driven by the electric slide rail 61, the second vision detection mechanism 69 moves away from point C. At this time, the rotary cylinder 67 is activated, and the connecting plate 68 and the second vision detection mechanism 69 rotate 180° under the drive of the rotary cylinder 67. Then, the two sets of adjusting cylinders 64 are activated respectively. Driven by the two sets of adjusting cylinders 64, the second vision detection mechanism 69 moves vertically downward. The electric slide rail 61 is activated again, and the second vision detection mechanism 69 moves to the position of detection point D under the drive of the electric slide rail 61. Then, the second vision detection mechanism 69 takes a picture of the lower side of the conical transition area, completing the picture detection of detection point D.

[0127] S45. After the detection of detection point D is completed, the electric slide rail 61 is restarted. Driven by the electric slide rail 61, the second vision detection mechanism 69 moves away from the conical transition area. One set of adjusting cylinders 64 is activated to extend, and the position of the other set of adjusting cylinders 64 is adjusted appropriately. The two sets of adjusting cylinders 64 are in a state of one high and one low. Under the adjustment of the two sets of adjusting cylinders 64, the second vision detection mechanism 69 is aligned with the detection point A. The electric slide rail 61 is restarted. Driven by the electric slide rail 61, the second vision detection mechanism 69 moves closer to the detection point A. The second vision detection mechanism 69 takes a picture of the detection point A and completes the detection of the detection point A.

[0128] S46. After the detection points A, B, C and D have all completed their corresponding detections, the second vision detection mechanism 69 can be adjusted in position by the two sets of adjusting cylinders 64. For the detection positions, the undetected positions can be photographed again to supplement the data, increase the richness of the data, analyze the leakage points, and complete the airtightness detection of the conical transition zone of the pipe fitting assembly 5.

[0129] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

Claims

1. A pipe fitting pressure testing device without welding, characterized in that: The device includes a placement component (1), on which a first sealing component (2) and a second sealing component (4) are disposed opposite each other. A first detection component (3) and a second detection component (6) are disposed on both sides of the first sealing component (2) and the second sealing component (4). A pipe fitting component (5) and a pressurizing component (7) are disposed in the middle of the first sealing component (2) and the second sealing component (4). The pipe assembly (5) includes a first pipe body (51), a second pipe body (52) is provided at one end of the first pipe body (51), and a tapered transition area is provided between the first pipe body (51) and the second pipe body (52). The conical transition zone includes detection point A, detection point B, detection point C, and detection point D; The first sealing assembly (2) includes a first sealing head for sealing the first pipe body (51); The second sealing assembly (4) includes a second sealing head (43) for sealing the second pipe body (52); The first detection component (3) includes a first visual detection mechanism (32) for detecting the conical transition region; The second detection component (6) includes a second visual detection mechanism (69) for detecting the conical transition zone.

2. The pipe fitting pressure testing device without welding according to claim 1, characterized in that: The placement assembly (1) includes a workbench (11), a first clamping mechanism (12) is provided on the top of the workbench (11), and a second clamping mechanism (13) is provided on one side of the first clamping mechanism (12).

3. The pipe fitting pressure testing device without welding according to claim 2, characterized in that: The second clamping mechanism (13) includes a base (131), a first limiting member (132) is provided on the top of the base (131), a second limiting member (133) is provided above the first limiting member (132), and the second tube (52) is located in the middle position between the second limiting member (133) and the first limiting member (132). The shapes of the second limiting member (133) and the first limiting member (132) are adapted to the shape of the second tube (52).

4. The pipe fitting pressure testing device without welding according to claim 3, characterized in that: A guide rail (135) is provided on one side of the first limiting member (132), and a sliding block (134) is slidably connected to the middle position of the guide rail (135). The second limiting member (133) is provided at the bottom of the sliding block (134), and a telescopic cylinder (136) is provided at the top of the guide rail (135). The output end of the telescopic cylinder (136) passes through the guide rail (135) and is connected to the sliding block (134).

5. The pipe fitting pressure testing device without welding according to claim 1, characterized in that: The first sealing assembly (2) further includes a first mounting bracket (21), which is disposed on the top of the placement assembly (1). A first sealing cylinder (22) is disposed on one side of the first mounting bracket (21), and the output end of the first sealing cylinder (22) is connected to the first sealing head.

6. The pipe fitting pressure testing device without welding according to claim 1, characterized in that: The first detection component (3) includes a support base (31) with an L-shaped shape. The support base (31) is located on the top of the placement component (1). The first visual inspection mechanism (32) is located on one side of the support base (31) and corresponds to the tapered transition area of ​​the pipe component (5).

7. The pipe fitting pressure testing device without welding according to claim 1, characterized in that: The second sealing assembly (4) includes a second mounting bracket (41), which is disposed on the top of the placement assembly (1). A second sealing cylinder (42) is disposed on one side of the second mounting bracket (41), and a second sealing head (43) is disposed at the output end of the second sealing cylinder (42).

8. The pipe fitting pressure testing device without welding according to claim 1, characterized in that: The second detection component (6) also includes an electric slide rail (61), which is located on the top of the placement component (1). The top of the electric slide rail (61) is slidably connected to a mounting plate (62). The top of the mounting plate (62) is symmetrically provided with two sets of limiting frames (63). Each set of limiting frames (63) is hinged with a set of adjusting cylinders (64). The output ends of the two sets of adjusting cylinders (64) are connected to adjusting plates (65).

9. A pipe fitting pressure testing device without welding according to claim 8, characterized in that: The top of the adjustment plate (65) is provided with a mounting base (66), and a rotary cylinder (67) is provided on one side of the mounting base (66). The output end of the rotary cylinder (67) is connected to a connecting plate (68), and the shape of the connecting plate (68) is set to L-shape. The second visual inspection mechanism (69) is provided on one side of the connecting plate (68).

10. A method for operating a pipe fitting weld-free pressure testing device, using the pipe fitting weld-free pressure testing device as described in any one of claims 1-9, characterized in that: Includes the following steps: S1. The pipe fitting assembly (5) is placed in the position of the placement assembly (1) by the robotic arm, and the placement assembly (1) limits the pipe fitting assembly (5); S2. After the pipe fitting assembly (5) is placed, it is sealed by the first sealing assembly (2) and the second sealing assembly (4) respectively. S3. After the pipe fitting assembly (5) is sealed, gas is injected into it through the pressurization assembly (7) to pressurize it and complete the pressure resistance test. The first detection assembly (3) and the second detection assembly (6) are used to test it. S4. After the pressure resistance test is completed, adjust the pressurization conditions and continue to test the air tightness of the pipe fitting assembly (5) that has passed the pressure resistance test.

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