Pipeline welding port sealing performance detection device

Abstract

The invention relates to the technical field of pipeline sealing performance detection, in particular to a pipeline welding port sealing performance detection device which comprises an equipment body and a fixing mechanism arranged in the equipment body and used for fixing and sealing a workpiece, a detection mechanism is connected to the outer side of the workpiece, and an elastic triggering mechanism is fixedly connected to the interior of the detection mechanism. The elastic triggering mechanism comprises two groups of elastic parts fixedly connected to the inner side of the detection mechanism; a first elastic film and a second elastic film of the elastic triggering mechanism are tightly attached to a weld joint area, gas exhausted from a weld joint leakage position directly impacts the elastic films to generate local protrusions, the protrusions drive the abutting assembly to be separated from limiting and abut against the upper end adjusting assembly to move, and then the adjusting assembly drives the marking assembly to move. The marking piece is automatically in contact with the surface of the workpiece to complete position marking, leakage of all positions of the welding seam can be accurately captured and automatically marked, and subsequent workers can directly and rapidly lock the leakage position through marks.

Description

Technical Field

[0001] This invention relates to the field of pipeline sealing performance testing technology, specifically a device for testing the sealing performance of pipeline weld joints. Background Technology

[0002] In industrial production and civil infrastructure construction, various metal pipes are used extensively as transport carriers for gases and liquids. When laying pipes, if the length of the pipes or other reasons cannot meet the requirements, multiple pipes need to be welded together. In order to ensure the sealing performance of the pipe weld joints, it is usually necessary to use detection devices to inspect the pipe connection welds. Most existing detection methods are divided into two types: pneumatic detection and hydrostatic detection. Since the diameter of gas molecules is much smaller than that of water molecules, they can penetrate the extremely fine pinholes and microcracks in the weld, making them more sensitive to detecting minute leaks. Therefore, pneumatic detection is widely used.

[0003] Chinese patent CN111141465A discloses a metal pipe welding airtightness detection device. When installed on the external weld of a pipe for inspection, the device divides the pipe weld into twelve parts through a leak detection chamber. This allows for the use of pressure gauges connected to the leak detection chamber to inspect the external weld of the pipe in different areas, improving the accuracy of weld inspection. When a leak is detected, the pressure gauges pinpoint the location of the leak, enabling personnel to perform welding repair work on the leak.

[0004] The above-mentioned and similar existing technologies test the sealing performance of pipelines by sealing both ends of the pipeline with a sealing structure, then injecting gas into the pipeline to achieve a certain pressure and holding it. The presence of leaks at the pipeline weld joints is determined by observing the pressure changes inside the pipeline or by placing the pipeline in a water tank to observe whether bubbles are generated. Although it can determine whether there are leaks at the pipeline weld joints, it is not convenient to detect the location of the leak, so it is more complicated in subsequent maintenance. Existing technology detects leaks by installing a ring-shaped auxiliary device at the weld joint on the outside of the pipe. The ring structure is divided into multiple chambers, with elastic seals separating each chamber. Pressure gauges are connected to the outside of each chamber to detect pressure changes inside, and the leak location is roughly determined by manual marking. While this can reduce the complexity of subsequent maintenance to some extent, if the leak occurs at the contact point between the elastic seal and the weld joint, the tight connection between the elastic seal and the pipe body can lead to inaccurate detection results. If a leak occurs during subsequent use, it may cause irreversible problems such as safety risks and economic losses.

[0005] Therefore, the present invention provides a device for testing the sealing performance of pipe weld joints that provides accurate test results and facilitates subsequent maintenance. Summary of the Invention

[0006] To address the problem of inaccurate test results in existing technologies leading to malfunctions in subsequent use, a sealing performance testing device for pipe weld joints has been designed.

[0007] The technical solution adopted by the present invention to solve its technical problem is: a sealing performance testing device for pipe weld joints, including a main body of equipment and a fixing mechanism inside the main body for fixing and sealing the workpiece, wherein the workpiece is connected to the outside of the testing mechanism, and an elastic triggering mechanism is fixedly connected inside the testing mechanism. The elastic triggering mechanism includes two sets of elastic parts fixedly connected to the inner side of the detection mechanism. The two sets of elastic parts connect and separate with the detection mechanism. When the workpiece is being inspected, the detection mechanism drives the elastic parts to adhere tightly to the weld seam of the workpiece and generate elastic deformation. Gas discharged from the leak impacts the elastic parts, causing them to bulge locally. The detection mechanism includes an installation part and several sets of contact adjustment parts disposed inside the installation part. A marking component is elastically connected to the bottom of one end of the contact adjustment part. When gas impacts the elastic part at the leak, the elastic part bulges locally, causing the contact adjustment part to move, which in turn causes the marking component to move so that its bottom contacts the outer side of the workpiece and marks its position.

[0008] Furthermore, the elastic part includes a first elastic membrane and a second elastic membrane that are fixedly connected to the inner side of the detection mechanism. The first elastic membrane has protrusions at both ends and the second elastic membrane has grooves at both ends. When the detection mechanism is installed, the protrusions of the first elastic membrane are connected to the grooves of the second elastic membrane to prevent local leakage when the leakage point is located at the connection part of the detection mechanism, which would make it difficult to impact the elastic part to make it protrude.

[0009] Furthermore, the detection mechanism also includes an adjustment cavity inside the mounting part. The mounting part includes a first mounting component and a second mounting component. A set of abutment adjustment components includes an abutment component slidably connected inside the adjustment cavity and an adjustment component connected to the upper end of the abutment component. Limiting components are symmetrically arranged inside the adjustment cavity about the abutment component. Several sets of reset components are arranged on one side of the first mounting component and the second mounting component. Adjustment grooves are provided inside the first mounting component and the second mounting component about the adjustment component and the marking component, which are used to drive the marking component to move inside the adjustment groove when the adjustment component moves.

[0010] Furthermore, one end of the first mounting component and the second mounting component are rotatably connected, and the other end is fixedly connected and separated by bolts. The adjustment cavity extends through the inner side of the first mounting component and the second mounting component. The first elastic membrane is fixedly connected to the inner side of the first mounting component, and the second elastic membrane is fixedly connected to the inner side of the second mounting component. Several sets of marking components are provided around the adjustment components. The marking components are used to mark the outer side of the workpiece to facilitate subsequent repair of weld leaks. Several sets of reset components are evenly distributed on one side of the first mounting component and the second mounting component.

[0011] Furthermore, the first mounting component has symmetrically arranged locking blocks at both ends, and the second mounting component has symmetrically arranged locking grooves at both ends. Several sets of protrusions are symmetrically arranged inside the adjustment cavity about the contact component. The limiting component is located inside the protrusions. The protrusion of the first elastic membrane is fixedly connected to the bottom of the locking block, and the groove of the second elastic membrane is opened at the bottom of the locking groove. It is used to drive the protrusion of the first elastic membrane into the groove of the second elastic membrane by the locking block when the detection mechanism is installed, so as to prevent gas from leaking from the connection.

[0012] Furthermore, a set of the abutting components includes an adjusting block and an abutting protrusion fixedly connected to the upper end of the adjusting block. A first elastic element is symmetrically arranged on the upper end of the adjusting block about the abutting protrusion. Sliders are fixedly connected to both sides of the adjusting block. Limiting grooves are symmetrically opened on both sides of the adjusting block at the bottom of the sliders. The adjusting component is slidably connected to the protrusion through the sliders to cooperate with the limiting component to limit the position of the abutting component and prevent it from maintaining its initial position when it is not abutted by the elastic triggering mechanism.

[0013] Furthermore, one set of the adjustment components includes an abutment member connected to the upper end of the abutment protrusion and an adjustment rod fixedly connected to the other end of the abutment member, with a marking component for marking the outside of the workpiece elastically connected to the bottom of the other end of the adjustment rod.

[0014] Furthermore, a set of the marking components includes a marking element and a sliding rod fixedly connected to the upper end of the marking element. The other end of the sliding rod is slidably connected to the inside of the adjusting rod, and a second elastic element is provided on the outside of the sliding rod.

[0015] A set of the reset components includes a pressing member and several sets of abutting rods arranged on the inner side of the pressing member about the adjusting rod. Several sets of third elastic members are fixedly connected to the inner side of the pressing member, and auxiliary slide rods are symmetrically arranged on the inner side of the pressing member about the third elastic members.

[0016] Furthermore, the main body of the equipment is provided with a support component for supporting the workpiece to be tested. The fixing mechanism includes fixing components symmetrically arranged inside the main body of the equipment. A sealing component is fixedly connected to one side of the fixing component for sealing both ends of the workpiece during testing. An air inlet is provided on one side of the sealing component.

[0017] The beneficial effects of this invention are: The present invention discloses a pipe weld joint sealing performance testing device. Through an elastic trigger mechanism, the first and second elastic membranes are tightly fitted to the weld area. Gas escaping from a weld leak directly impacts the elastic membranes, causing them to bulge locally. This bulge causes the contact component to disengage from its limit position and contact the upper adjustment component, which then moves the marking component. The adjustment component then moves the marking component, causing the marking element to automatically contact the workpiece surface and complete the position marking. This device accurately detects leaks at various points along the weld and automatically marks them. Subsequent workers can quickly locate the leak directly through the markings, avoiding the blind inspection of the entire weld area in traditional maintenance. This significantly reduces welding material consumption and wasted time, further improving subsequent maintenance efficiency. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the workpiece during installation according to the present invention; Figure 3 This is a schematic diagram of the fixing mechanism structure of the present invention; Figure 4 This is a schematic diagram of the workpiece and detection mechanism structure of the present invention; Figure 5 This is a schematic diagram of the detection mechanism structure of the present invention; Figure 6 This is a partial cross-sectional view of the detection mechanism of the present invention; Figure 7 For the present invention Figure 6 A partially enlarged sectional view at point A; Figure 8 This is a schematic diagram of the elastic triggering mechanism of the present invention; Figure 9 For the present invention Figure 8 A magnified view of section B; Figure 10 This is a schematic diagram of the second mounting component structure of the present invention; Figure 11 For the present invention Figure 10 A magnified view of a portion at point C; Figure 12 This is a schematic diagram of the structure of the first mounting component of the present invention; Figure 13 For the present invention Figure 11 A magnified view of a portion at point D; Figure 14 This is a partial cross-sectional view of the first mounting component of the present invention; Figure 15 For the present invention Figure 14A magnified view of a portion at point E; Figure 16 For the present invention Figure 14 A magnified view of a portion at point F; Figure 17 This is a schematic diagram of the structure of the contact component of the present invention; Figure 18 This is a schematic diagram of the structure of the adjustment component and the marking component of the present invention; Figure 19 This is a schematic diagram of the reset component structure of the present invention; Figure 20 This is a schematic diagram of the limiting component structure of the present invention.

[0020] In the diagram: 1. Main body of the equipment; 2. Fixing mechanism; 21. Fixing component; 22. Sealing component; 23. Air inlet; 3. Support component; 4. Workpiece; 5. Detection mechanism; 51. First mounting component; 511. Locking block; 52. Second mounting component; 521. Locking groove; 53. Adjustment cavity; 531. Protrusion; 54. Abutment assembly; 541. Adjustment block; 542. Abutment protrusion; 543. First elastic component; 544. Slider; 545. Limiting groove; 55 56. Limiting component; 56. Adjusting component; 561. Abutting element; 562. Adjusting rod; 57. Marking component; 571. Marking element; 572. Sliding rod; 573. Second elastic element; 58. Reset component; 581. Pressing element; 582. Abutting rod; 583. Third elastic element; 584. Auxiliary sliding rod; 59. Adjusting groove; 6. Elastic triggering mechanism; 61. First elastic membrane; 611. Protrusion; 62. Second elastic membrane; 621. Groove. Detailed Implementation

[0021] To make the technical means, technical features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] Example: Figure 1 - Figure 20As shown, the sealing performance testing device for pipe weld joints of the present invention includes a main body 1 and a fixing mechanism 2 inside the main body 1 for fixing and sealing a workpiece 4. A testing mechanism 5 is connected to the outside of the workpiece 4, and an elastic triggering mechanism 6 is fixedly connected inside the testing mechanism 5. The elastic triggering mechanism 6 includes two sets of elastic parts fixedly connected to the inside of the testing mechanism 5. The two sets of elastic parts connect and separate with the testing mechanism 5. When testing the workpiece 4, the testing mechanism 5 drives the elastic parts to tightly adhere to the weld joint of the workpiece 4 to generate elastic deformation. Gas discharged from the leak impacts the elastic parts, causing them to bulge locally. The testing mechanism 5 includes an installation part and several sets of contact adjustment parts inside the installation part. A marking component 57 is elastically connected to the bottom of one end of the contact adjustment part. When gas impacts the elastic part at the leak, the elastic part bulges locally, causing the contact adjustment part to move, which in turn causes the marking component 57 to move so that its bottom contacts the outside of the workpiece 4 and marks its position.

[0023] Specifically, the main body 1 of the equipment is equipped with a support member 3 for supporting the workpiece 4 to be tested. The fixing mechanism 2 includes a fixing member 21 symmetrically arranged inside the main body 1. A sealing member 22 is fixedly connected to one side of the fixing member 21 for sealing both ends of the workpiece 4 during testing. A driving mechanism is provided inside the fixing member 21 for driving the sealing member 22 to move, so as to realize the contact and separation of the sealing member 22 with the workpiece 4. An air inlet 23 is provided on one side of the sealing member 22 for injecting gas into the workpiece 4 when testing the sealing performance of the workpiece 4, so that the internal air pressure of the workpiece 4 reaches a certain level, and then pressure is maintained. The workpiece 4 is made of two sets of pipes welded together and can be used in a vacuum system. The product qualification is determined by detecting whether there is leakage at the weld. When testing the sealing performance of the weld joint of workpiece 4, workpiece 4 is first placed on the upper end of support member 3, and then sealed by sealing member 22 to ensure that no leakage occurs during processing. Next, the detection mechanism 5 is opened by rotating the first mounting member 51, and then the detection mechanism 5 is installed at the weld joint on the outside of workpiece 4 and connected to the mounting part by bolts. As the mounting part is connected, the elastic part is connected. At the same time, the elastic part deforms when it contacts the weld joint, so that it fits tightly with the weld joint to prevent leakage at the connection point from affecting the triggering effect of the detection mechanism 5. Then, gas is injected into the inside of workpiece 4 through air inlet 23 to make the internal air pressure of workpiece 4 reach a certain level, and then the pressure is maintained for a period of time. If a leak occurs at the weld joint, the leaking gas will impact the elastic part and cause a local bulge. As the bulge is generated, it will abut against the upper abutment adjustment part, and then the abutment adjustment part will drive the marking component 57 to move. As the marking component 57 moves, it automatically marks the outside of workpiece 4, so that subsequent workers can quickly determine the location of the weld leak and carry out subsequent operations such as repair by using the marked position.

[0024] In this embodiment, the elastic part includes a first elastic membrane 61 and a second elastic membrane 62, which are respectively fixedly connected to the inner side of the detection mechanism 5. The first elastic membrane 61 has protrusions 611 at both ends, and the second elastic membrane 62 has grooves 621 at both ends; specifically, as shown... Figure 8 and Figure 9 As shown, when the first elastic membrane 61 and the second elastic membrane 62 deform, the middle part close to the weld seam slightly arches up. The surfaces of the first elastic membrane 61 and the second elastic membrane 62 are flat in the initial state. When the detection mechanism 5 is installed, the mounting part drives the protrusion 611 of the first elastic membrane 61 to connect with the groove 621 of the second elastic membrane 62, so that the contact parts of the first elastic membrane 61 and the second elastic membrane 62 overlap. When the leakage point is located at the connection part of the detection mechanism 5, the gas leakage rate at the connection of the first elastic membrane 61 and the second elastic membrane 62 can be reduced, avoiding local leakage that makes it difficult for the gas to impact the first elastic membrane 61 or the second elastic membrane 62 to cause it to bulge. After the detection mechanism 5 is installed, it presses the elastic triggering mechanism 6 to make it fit tightly against the outside of the workpiece 4 to prevent gas leakage. The two sides of the first elastic membrane 61 and the second elastic membrane 62 are fixedly connected to the inside of the first mounting part 51 and the second mounting part 52. After the first elastic membrane 61 and the second elastic membrane 62 are installed with the detection mechanism 5, they can close the side of the adjustment cavity 53 near the workpiece 4.

[0025] In this embodiment, the detection mechanism 5 further includes an adjustment cavity 53 inside the mounting part. The mounting part includes a first mounting member 51 and a second mounting member 52. A set of abutment adjustment parts includes an abutment component 54 slidably connected inside the adjustment cavity 53 and an adjustment component 56 connected to the upper end of the abutment component 54. Limiting components 55 are symmetrically arranged inside the adjustment cavity 53 about the abutment component 54. Several sets of reset components 58 are arranged on one side of the first mounting member 51 and the second mounting member 52. Adjustment grooves 59 are arranged inside the first mounting member 51 and the second mounting member 52 about the adjustment component 56 and the marking component 57.

[0026] Specifically, such as Figure 4 - Figure 7 and Figure 10 - Figure 20As shown, the connecting end faces of the first mounting member 51 and the second mounting member 52 are sealed, and the interiors of the first mounting member 51 and the second mounting member 52 are sealed, located on both sides of the elastic triggering mechanism 6. One end of the first mounting member 51 and the second mounting member 52 are rotatably connected, and the other end is fixedly connected and separated by bolts. The adjusting cavity 53 extends through the inner side of the first mounting member 51 and the second mounting member 52. The first elastic membrane 61 is fixedly connected to the inner side of the first mounting member 51, and the second elastic membrane 62 is fixedly connected to the inner side of the second mounting member 52. Several sets of marking components 57 are provided around the adjusting component 56. The marking components 57 are used to mark the outer side of the workpiece 4 to facilitate subsequent repair of weld leaks. Several sets of reset components 58 are evenly distributed on one side of the first mounting member 51 and the second mounting member 52. The adjusting groove 59 is used to drive the marking components 57 to move inside the adjusting groove 59 when the adjusting component 56 moves. The limiting component 55 is as follows. Figure 20 The diagram includes an elastic telescopic rod and a dome block at one end. The limiting component 55 can also be set to any other structure that can achieve the same effect. The first mounting component 51 has symmetrically arranged locking blocks 511 at both ends, and the second mounting component 52 has symmetrically arranged locking grooves 521 at both ends. The adjustment cavity 53 has several sets of protrusions 531 symmetrically arranged about the contact component 54. The limiting component 55 is located inside the protrusions 531. The protrusions 611 of the first elastic membrane 61 are fixedly connected to the bottom of the locking blocks 511. The grooves 621 of the second elastic membrane 62 are opened at the bottom of the locking grooves 521. When the detection mechanism 5 is installed, the protrusions 611 of the first elastic membrane 61 are driven by the locking blocks 511 to engage with the grooves 621 of the second elastic membrane 62 to prevent gas from leaking from the connection.

[0027] In this embodiment, a set of abutment components 54 includes an adjustment block 541 and an abutment protrusion 542 fixedly connected to the upper end of the adjustment block 541. A first elastic element 543 is symmetrically arranged on the upper end of the adjustment block 541 about the abutment protrusion 542. A slider 544 is fixedly connected to both sides of the adjustment block 541. A limiting groove 545 is symmetrically opened on both sides of the adjustment block 541 at the bottom of the slider 544. The adjustment component 56 is slidably connected to the protrusion 531 through the slider 544, and is used to cooperate with the limiting component 55 to limit the position of the abutment component 54 and prevent it from remaining unchanged in its initial position when it is not abutted by the elastic triggering mechanism 6.

[0028] Specifically, such as Figure 17As shown, the end of the abutting protrusion 542 away from the adjusting block 541 has an inclined surface. The two ends of the first elastic member 543 are fixedly connected to the adjusting block 541 and the inner wall of the adjusting cavity 53, respectively. The first elastic member 543 is set as a pre-tension spring. The tension force provided by the first elastic member 543 to the adjusting block 541 is less than the limiting force of the limiting component 55 on the abutting component 54, so it will not cause the abutting component 54 to disengage from the limiting position. When the local protrusion generated by the first elastic membrane 61 or the second elastic membrane 62 abuts against the bottom of the adjusting block 541, the abutting component 54 can easily disengage from the limiting component 55. Subsequently, the abutting component 54 moves due to the reset of the first elastic member 543 and the local protrusion generated by the first elastic membrane 61 or the second elastic membrane 62. Then, the inclined surface at the top of the abutting protrusion 542 drives the adjusting component 56 to move. The dome block at one end of the limiting component 55 is inserted into the limiting groove 545 to limit the abutting component 54.

[0029] In this embodiment, a set of adjustment components 56 includes an abutment 561 connected to the upper end of the abutment protrusion 542 and an adjustment rod 562 fixedly connected to the other end of the abutment 561. The bottom of the other end of the adjustment rod 562 is elastically connected to a marking component 57 for marking the outside of the workpiece 4. A set of marking components 57 includes a marking element 571 and a sliding rod 572 fixedly connected to the upper end of the marking element 571. The other end of the sliding rod 572 is slidably connected inside the adjustment rod 562. A second elastic element 573 is provided on the outside of the sliding rod 572.

[0030] Specifically, such as Figure 18 As shown, the end of the abutment 561 away from the adjusting rod 562 is connected to the upper inclined surface of the abutment protrusion 542. As the abutment protrusion 542 moves, it presses the abutment 561 to move. The upper inclined surface of the abutment protrusion 542 makes the moving distance of the abutment 561 greater than the moving distance of the abutment protrusion 542. The adjusting rod 562 is L-shaped, and the bottom of the end away from the abutment 561 is connected to the marking component 57. When the adjusting component 56 is abutted, the adjusting rod 562 can slide inside the first mounting component 51 or the second mounting component 52. The end of the sliding rod 572 inside the marking assembly 57, away from the marking element 571, is slidably connected to the inside of the adjusting rod 562. The two ends of the second elastic element 573 are fixedly connected to the bottom of the adjusting rod 562 and the top of the marking element 571, respectively. The second elastic element 573 is configured as a pre-compression spring. Figure 16As shown, an arc-shaped protrusion is provided on the bottom side of the adjustment groove 59 to accommodate the marking component 57. Normally, the marking component 57 will not be marked on the outside of the workpiece 4. When the adjustment rod 562 moves the marking component 57, the marking component 571 disengages from the arc-shaped protrusion. At this time, the second elastic element 573 resets and causes the marking component 571 to contact the outside of the workpiece 4 and make a mark. At the same time, the marking range can be further increased as it moves. The marking component 571 is set to a structure that can slide a mark or color on the outside of the workpiece 4 through the bottom. It can also be set to any other structure that can achieve the same effect.

[0031] In this embodiment, a set of reset components 58 includes a pressing member 581 and a plurality of abutting rods 582 disposed on the inner side of the pressing member 581 about the adjusting rod 562. A plurality of third elastic members 583 are fixedly connected to the inner side of the pressing member 581. Auxiliary slide rods 584 are symmetrically disposed on the inner side of the pressing member 581 about the third elastic members 583.

[0032] Specifically, such as Figure 19 As shown, the reset component 58 is used to apply force to the pressing member 581 and drive the triggered adjustment component 56 to reset via the abutment rod 582, thereby driving the marking component 57 and the abutment component 54 to reset. Each set of reset components 58 drives the same number of adjustment components 56 to reset. As the pressing member 581 is pressed, the abutment rod 582 will abut against one end of the adjustment rod 562 and drive it to move. The abutment member 561 will press the upper inclined surface of the abutment protrusion 542, causing the abutment component 54 to move and reset. The third elastic member 583 is used to drive the pressing member 581 to reset after being pressed. The auxiliary slide rod 584 is used to stabilize the movement of the pressing member 581 and at the same time limit the pressing member 581 to prevent it from detaching from the first mounting member 51 or the second mounting member 52. The third elastic member 583 can be set as a spring, or it can be set as any other structure that can achieve the same effect.

[0033] Working principle: When testing the sealing performance of the weld joint of workpiece 4, workpiece 4 is first placed on the upper end of support member 3. Then, the drive mechanism inside the fixing member 21 drives the closing member 22 to move, so that one end of it is installed inside the workpiece 4 to seal it and ensure that no leakage occurs during processing. Next, the first mounting member 51 is rotated to open the detection mechanism 5. Then, the detection mechanism 5 is installed on the outside of workpiece 4 and the first mounting member 51 and the second mounting member 52 are connected by bolts. As the first mounting member 51 and the second mounting member 52 are connected, the locking block 511 drives the protrusion 611 of the first elastic membrane 61 to engage with the groove 621 of the second elastic membrane 62. At the same time, the first elastic membrane 61 and the second elastic membrane 62 deform and fit tightly with the weld joint to prevent leakage when the weld leakage point is located at the connection. Then, gas can be injected into the workpiece 4 through the air inlet 23 to make the internal air pressure of the workpiece 4 reach a certain level, and then maintain the pressure for a period of time. If a leak occurs at the weld, the leaking gas will impact the first elastic membrane 61 or the second elastic membrane 62 to make a local protrusion. As the protrusion is generated, it will abut against the upper abutment component 54. When the abutment component 54 is abutted, it moves and breaks away from the limit component 55. Then, the inclined end of the upper abutment protrusion 542 abuts against the adjustment component 56. As the abutment protrusion 542 moves, it drives the adjustment component 56 to move. Then, the adjustment component 56 drives the marking component 57 to move. As the marking component 57 moves, its bottom marking piece 571 automatically marks the outside of the workpiece 4, so that subsequent workers can quickly determine the location of the weld leak and carry out subsequent operations such as repair by using the marked position. After holding the pressure for a period of time, the detection mechanism 5 can be disassembled. By pressing the reset component 58, the internal abutment rod 582 abuts against one end of the internal adjustment rod 562 of the adjustment component 56, and the adjustment component 56 drives the abutment component 54 to reset, so that the limit component 55 limits the abutment component 54 again for subsequent detection.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for testing the sealing performance of pipe weld joints, comprising a main body and a fixing mechanism inside the main body for fixing and sealing the workpiece, characterized in that: A detection mechanism is connected to the outside of the workpiece, and an elastic triggering mechanism is fixedly connected inside the detection mechanism. The elastic triggering mechanism includes two sets of elastic parts fixedly connected to the inner side of the detection mechanism. The two sets of elastic parts connect and separate with the detection mechanism. When the workpiece is being inspected, the detection mechanism drives the elastic parts to fit tightly against the weld seam of the workpiece. Gas discharged from the leak point impacts the elastic parts, causing them to bulge locally. The detection mechanism includes an installation part and several sets of contact adjustment parts inside the installation part. A marking component is elastically connected to the bottom of one end of the contact adjustment part. When gas impacts the elastic part at the leak point, the elastic part generates a local protrusion, which drives the contact adjustment part to move, thereby driving the marking component to move so that its bottom contacts the outside of the workpiece and marks the position.

2. The pipe weld joint sealing performance testing device according to claim 1, characterized in that: The elastic part includes a first elastic membrane and a second elastic membrane that are fixedly connected to the inner side of the detection mechanism. The first elastic membrane has protrusions at both ends and the second elastic membrane has grooves at both ends, which are used to connect the protrusions of the first elastic membrane with the grooves of the second elastic membrane when the detection mechanism is installed.

3. The pipe weld joint sealing performance testing device according to claim 2, characterized in that: The detection mechanism also includes an adjustment cavity inside the mounting part. The mounting part includes a first mounting component and a second mounting component. A set of abutment adjustment components includes an abutment component slidably connected inside the adjustment cavity and an adjustment component connected to the upper end of the abutment component. Limiting components are symmetrically arranged inside the adjustment cavity about the abutment component. Several sets of reset components are arranged on one side of the first mounting component and the second mounting component. Adjustment grooves are provided inside the first mounting component and the second mounting component about the adjustment component and the marking component.

4. The pipe weld joint sealing performance testing device according to claim 3, characterized in that: One end of the first mounting component and the second mounting component are rotatably connected, and the other end is fixedly connected and separated by bolts. The adjustment cavity extends through the inner side of the first mounting component and the second mounting component. The first elastic membrane is fixedly connected to the inner side of the first mounting component, and the second elastic membrane is fixedly connected to the inner side of the second mounting component. Several sets of marking components are provided around the adjustment components. The marking components are used to mark the outer side of the workpiece to facilitate subsequent repair of weld leaks.

5. The pipe weld joint sealing performance testing device according to claim 4, characterized in that: The first mounting component has symmetrically arranged locking blocks at both ends, and the second mounting component has symmetrically arranged locking grooves at both ends. Several sets of protrusions are symmetrically arranged inside the adjustment cavity about the contact component. The limiting component is located inside the protrusions. The protrusion of the first elastic membrane is fixedly connected to the bottom of the locking block. The groove of the second elastic membrane is opened at the bottom of the locking groove, which is used to drive the protrusion of the first elastic membrane into the groove of the second elastic membrane when the detection mechanism is installed.

6. The pipe weld joint sealing performance testing device according to claim 3, characterized in that: A set of the abutting components includes an adjusting block and an abutting protrusion fixedly connected to the upper end of the adjusting block. A first elastic element is symmetrically arranged on the upper end of the adjusting block about the abutting protrusion. Sliders are fixedly connected to both sides of the adjusting block. Limiting grooves are symmetrically opened on both sides of the adjusting block at the bottom of the sliders. The adjusting component is slidably connected to the protrusion through the sliders to cooperate with the limiting component to limit the position of the abutting component.

7. The pipe weld joint sealing performance testing device according to claim 4, characterized in that: One set of the adjustment components includes an abutment member connected to the upper end of the abutment protrusion and an adjustment rod fixedly connected to the other end of the abutment member. The bottom of the other end of the adjustment rod is elastically connected to a marking component for marking the outside of the workpiece.

8. The pipe weld joint sealing performance testing device according to claim 7, characterized in that: A set of the marking components includes a marking element and a sliding rod fixedly connected to the upper end of the marking element. The other end of the sliding rod is slidably connected to the inside of an adjusting rod, and a second elastic element is provided on the outside of the sliding rod.

9. The pipe weld joint sealing performance testing device according to claim 4, characterized in that: A set of the reset components includes a pressing member and several sets of abutting rods arranged on the inner side of the pressing member about the adjusting rod. Several sets of third elastic members are fixedly connected to the inner side of the pressing member, and auxiliary slide rods are symmetrically arranged on the inner side of the pressing member about the third elastic members.

10. The pipe weld joint sealing performance testing device according to claim 1, characterized in that: The main body of the equipment is equipped with a support component for supporting the workpiece to be tested. The fixing mechanism includes fixing components symmetrically arranged inside the main body of the equipment. A sealing component is fixedly connected to one side of the fixing component to seal both ends of the workpiece during testing. An air inlet is provided on one side of the sealing component.

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