Leakage test tool for intensive welded pipeline group and operation method

Abstract

The invention relates to a leakage test tool for an intensive welded pipeline group and an operation method, the leakage test tool comprises a support assembly, turntables, a rotating mechanism, a pipeline body and a clamping mechanism, the turntables are arranged in the support assembly, the rotating mechanism is sleeved outside the turntables, the pipeline body is sleeved in the two turntables, and the clamping mechanism is arranged at the top end of the support assembly. According to the method, the problem that weld joint quality detection cannot be rapidly and reliably carried out on an existing intensive welded pipeline is solved, a pipeline body is placed in a rotary disc, and the rotary disc is temporarily buckled through a support assembly; a motor is started to drive a main driving disc and an auxiliary driving disc to rotate synchronously through a rotating shaft, so that a main wheel disc and an auxiliary wheel disc are driven to rotate synchronously through a belt, and the main wheel disc and the auxiliary wheel disc drive rotating discs at the two ends and a pipeline body in the rotating discs to rotate and generate centrifugal force in a pipeline; the particle trapper is arranged outside the pipeline to serve as monitoring equipment to monitor whether leakage of the pipeline welding seam occurs or not, and the requirement for quality detection of the pipeline welding seam is met.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline welding, and in particular to a welding quality detection technology for a multi-channel pipeline group with narrow separation space formed due to densely arranged pipelines, and specifically to a leakage test tool and an operation method for a densely welded pipeline group. Background Art

[0002] In the field of industrial pipelines, the possibility of gas (or fluid) leakage from the weld of welded pipelines is a complex and critical safety issue, which is affected by a variety of factors. Among them, the quality of the weld is crucial. If there are defects such as lack of fusion, lack of penetration, slag inclusions, cracks, etc., these will become direct channels for gas (or fluid) to leak under pressure. At the same time, the strength, toughness and corrosion resistance of the pipeline material will also affect the sealing and overall strength of the weld. If the material itself has defects or is susceptible to corrosion, then the weld will be more likely to leak when under pressure.

[0003] In addition, the type of gas (or fluid) and its pressure are also important factors affecting the possibility of leakage. In particular, some toxic and harmful gases, such as carbon monoxide, nitrogen oxides, ozone and hydrogen fluoride, are more likely to leak through weld defects under pressure due to their small size and strong permeability. The leakage of these toxic and harmful gases will not only pollute the environment, but also pose a serious threat to people's lives and health.

[0004] In particular, there are many challenges in conducting weld leak detection on pipelines in a small space where pipelines are close to each other: space limitations make it difficult for inspectors to perform their duties, their vision is blocked, the operation is more difficult, such as equipment operation difficulties, extended detection time, and the applicability of detection technology is limited. The detection technology may not be able to fully function due to space limitations, and some detection equipment is too large or heavy to be suitable for small spaces. In addition, the need for specific power supply or environmental conditions further aggravates the difficulty and complexity of detection.

[0005] Therefore, in order to ensure the safe operation of welded pipelines, a series of effective detection and prevention measures must be taken on the pipelines before they are put into use. Summary of the invention

[0006] The purpose of the present invention is to provide a leakage test tool and operation method for a densely welded pipe group, by placing the pipe body in a turntable, and temporarily locking the turntable with a bracket assembly; starting a motor to use a rotating shaft to drive a main drive disk and an auxiliary drive disk to rotate synchronously, thereby driving a main wheel disk and an auxiliary wheel disk to rotate synchronously with the help of a belt, and the main wheel disk and the auxiliary wheel disk respectively drive the turntables at both ends and the pipe body inside to rotate, so that the pipe rotates continuously and generates centrifugal force, and at the same time, the weld part of the pipe is detected in real time by a detection device arranged with the pipe; in this way, the purpose of leak testing welds in densely packed pipe groups and narrow spaces is achieved, and the problems raised in the above-mentioned background technology are solved.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a leakage testing tool for a densely welded pipe group, comprising a bracket assembly, a turntable, a rotating mechanism, a pipe body and a clamping mechanism, wherein two bracket assemblies are provided, each bracket assembly is provided with a turntable inside, the outside of the turntable is sleeved with a rotating mechanism for driving the turntable to rotate, the two ends of the pipe body are respectively sleeved inside the two turntables, and the top of each bracket assembly is respectively provided with a clamping mechanism for temporarily clamping the bracket assembly and the turntable inside the pipe body.

[0008] Furthermore, the bracket assembly includes a base, a hinge, a clamping block and a semi-arc groove. The hinges are symmetrically arranged on both sides of the base, and the clamping blocks are symmetrically arranged on the upper end surface of the base. The clamping blocks are movably connected to the base through the hinges on both sides. A semi-arc groove is opened on the inner side of each clamping block, and a circular hole is formed by the semi-arc grooves on both sides for socketing the turntable.

[0009] Furthermore, a large through hole is provided at the center of the turntable, and small through holes are provided around the periphery of the large through hole, and a detachable leak detector (23) is provided on the outside of one of the small through holes, wherein the leak detector (23) has an annular insulating shell and a built-in high-sensitivity gas sensor or particle trap, and can accurately detect a variety of harmful gases through the built-in high-sensitivity gas sensor or particle trap; the leak detector (23) is also equipped with a rechargeable lithium battery and a high-brightness LED light or a buzzer, and when it is detected that the gas concentration exceeds the standard, the indicator immediately activates an audible and visual alarm, and sends out an obvious alarm signal through the high-brightness LED light and the buzzer.

[0010] Furthermore, the rotating mechanism includes a main wheel disc, an auxiliary wheel disc, a belt, a main drive disc, an auxiliary drive disc, a rotating shaft and a motor. The main wheel disc and the auxiliary wheel disc are respectively sleeved on two rotating discs. The main wheel disc and the auxiliary wheel disc are respectively sleeved on a belt, and the other ends of the two belts are respectively on the main drive disc and the auxiliary drive disc. A rotating shaft is connected between the main drive disc and the auxiliary drive disc, and one end of the rotating shaft passes through the interior of the main drive disc and is connected to the motor.

[0011] Furthermore, the clamping mechanism includes a slide rail, a slider, a connecting plate, a gas rod and a cylinder. The slide rail is arranged on one side of the top of the bracket assembly, and the slider is sleeved on the slide rail. Connecting plates are symmetrically arranged on both sides of the slider. A gas rod is inserted into each connecting plate, and the other end of the gas rod is connected to the cylinder.

[0012] Furthermore, a hard rubber protective layer is provided on the inner walls of the large through hole and the small through hole in the rotating disk, and the inner diameters of the large through hole and the small through hole are respectively matched with the outer diameter of the pipeline body.

[0013] Furthermore, support feet are respectively provided on both sides of the main driving disk and the auxiliary driving disk, and the bottoms of the support feet are connected to support plates.

[0014] Furthermore, one end of the gas rod passing through the connecting plate is sleeved with a connecting ring, and the connecting ring and the gas rod are temporarily fastened by a rotating thread.

[0015] Furthermore, limit plates are vertically arranged on the upper end surfaces on both sides of the slide rail.

[0016] A method for operating a leak testing tool for a densely welded pipe group comprises the following steps: Step 1: Before testing, remove the connecting ring, push the slider outward to make the connecting plate away from the gas rod, place the turntable in the semi-arc grooves of the two clamping blocks, and then sleeve several pipe bodies into the large through hole and the small through hole respectively; Step 2: Before testing, fold up the clamps on both sides to insert the gas rod into the corresponding connecting plate and put the connecting ring back. Start the cylinder to make the gas rod pull the connecting plate and the slider to move inward along the slide rail. Temporarily buckle the turntable and its pipeline body in the bracket assembly. There is a certain gap between the turntable and the inner wall of the clamp after the buckling, so that the turntable can rotate. Then operate the turntable and the bracket assembly at the other end according to the same steps. Step 3: Before testing, a leakage detector (23) is installed on a certain pipeline body (4), and in particular, the leakage detector (23) can be installed at a weld position of a key pipeline body (4); Step 4: Fill all test pipes with inert gas and temporarily seal the pipe ports with plugs or blind plates; Step 5: Start the motor (37) to drive the rotating shaft (36) to drive the main drive disc (34) and the auxiliary drive disc (35) to rotate synchronously. The main drive disc (34) and the auxiliary drive disc (35) respectively drive the main wheel disc (31) and the auxiliary wheel disc (32) to rotate synchronously by means of the belt (33). Based on this, the main wheel disc (31) and the auxiliary wheel disc (32) respectively drive the rotating discs (2) at both ends to rotate, so that the pipeline gradually generates centrifugal force due to the rotation; Step 6: Under the action of the centrifugal force generated by the continuous rotation, the inert gas inside the pipeline body (4) generates pressure outside the pipeline. Based on this, the leakage detector (23) rotating with the pipeline performs continuous leakage detection on the pipeline, especially the weld position of the pipeline, in real time; Step 7: When the motor (37) is turned off and stops rotating, the air cylinder (55) is started to cause the air rod (54) to pull the connecting plate (53) and the slider (52) to move outward along the slide rail (51), then the connecting ring (541) is removed to move the air rod (54) out of the inside of the connecting plate (53), and the clamping blocks (13) on both sides are folded downward to remove the turntable (2), remove the pipeline body (4), remove the leakage detector (23), and then operate the turntable (2) and the bracket assembly (1) at the other end according to the same steps.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention places a plurality of pipeline bodies in a turntable, and temporarily holds the turntable by using bracket assemblies at both ends; a starting motor drives a main drive disk and an auxiliary drive disk to rotate synchronously by using a rotating shaft, thereby driving a main wheel disk and an auxiliary wheel disk to rotate synchronously by means of a belt, and the main wheel disk and the auxiliary wheel disk respectively drive the turntables at both ends and the pipeline bodies inside thereof to rotate, and centrifugal force is generated during the rotation process, thereby creating pressure for the test gas inside the pipeline body, so as to further test whether the gas will seep out from the weld part of the pipeline under pressure by using a leak detector, thereby achieving weld testing of a dense pipeline group; thus, safety protection is provided for the subsequent actual use of the pipeline group. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the leakage test tool for the intensive welding pipeline group of the present invention; Figure 2 It is a front view schematic diagram of the rotating mechanism of the present invention; Figure 3 It is a front view schematic diagram of a leakage testing tool for a densely welded pipe group of the present invention; Figure 4 It is a front view of the clamping mechanism of the present invention; Figure 5 It is a partial enlarged view of the leakage testing tool for the densely welded pipe group of the present invention.

[0019] In the figure: 1. bracket assembly; 11. base; 12. hinge; 13. clamping block; 14. semi-arc groove; 2. turntable; 21. large through hole; 22. small through hole; 23. leakage detector; 3. rotating mechanism; 31. main pulley; 32. auxiliary pulley; 33. belt; 34. main drive disk; 35. auxiliary drive disk; 36. rotating shaft; 37. motor; 4. pipeline body; 5. clamping mechanism; 51. slide rail; 52. slider; 53. connecting plate; 54. gas rod; 541. connecting ring; 55. cylinder. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] For densely packed pipe groups, the existing inspection equipment is often limited by the volume and cannot reach the weld position for weld inspection due to the small distance between the pipes. Figure 1-Figure 5 , this embodiment provides the following technical solutions: In this embodiment, for example, a factory needs to perform leakage tests on welds of multiple straight pipe sections and curved pipe sections.

[0022] A leakage test tool for a densely welded pipe group, comprising a support assembly 1, a turntable 2, a rotating mechanism 3, a pipe body 4 and a clamping mechanism 5, wherein two support assemblies 1 are provided, each support assembly 1 is provided with a turntable 2 inside, the support assembly 1 comprises a base 11, a hinge 12, a clamping block 13 and a semi-arc groove 14, the two sides of the base 11 are symmetrically provided with hinges 12, the upper end surface of the base 11 is symmetrically provided with clamping blocks 13, and the clamping blocks 13 are movably connected to the base 11 through the hinges 12 on both sides, and the base 11 is clamped by the hinges 12. The base 11 is connected to the clamping block 13, so that the clamping block 13 can be freely opened and closed on the upper end surface of the base 11 by the hinge 12, so as to facilitate the placement of the turntable 2; a semi-arc groove 14 is provided on the inner side of each clamping block 13, and a circular hole is formed by the semi-arc grooves 14 on both sides for sleeve-fitting the turntable 2, a large through hole 21 is provided at the center of the turntable 2, and small through holes 22 are arranged around the periphery of the large through hole 21, and the setting of the large through hole 21 and the small through hole 22 optimizes the diversity of accommodating the pipeline body 4; the inner side of the large through hole 21 and the small through hole 22 in the turntable 2 A hard rubber protective layer is provided on the wall to protect the outer wall of the pipe body 4 and prevent the outer wall of the pipe body 4 from being worn; and the inner diameters of the large through hole 21 and the small through hole 22 are respectively adapted to the outer diameter of the pipe body 4, and a leak detector 23 is provided outside one of the small through holes 22, and the leak detector 23 has an annular insulating shell and a built-in high-sensitivity gas sensor or particle trap, and accurately detects a variety of harmful gases through the built-in high-sensitivity gas sensor or particle trap; the leak detector 23 is also equipped with a rechargeable lithium battery and a high-brightness LED light or a buzzer. When it is detected that the gas concentration exceeds the standard, the prompter immediately starts the sound and light alarm, and sends out an obvious alarm signal through the high-brightness LED light and the buzzer; the leak detector 23 can be set outside a small through hole 22 to detect the leakage of the pipe body 4 connected thereto, or it can be set outside each small through hole 22 one by one to detect the leakage of each connected pipe body 4. Since the active leak detector 23 is an existing public technology, the present invention does not make much description.The outer part of each turntable 2 is sleeved with a rotating mechanism 3 for driving the turntable 2 to rotate. The rotating mechanism 3 includes a main wheel disc 31, an auxiliary wheel disc 32, a belt 33, a main drive disc 34, an auxiliary drive disc 35, a rotating shaft 36 and a motor 37. The main wheel disc 31 and the auxiliary wheel disc 32 are sleeved on the two turntables 2 respectively. The main wheel disc 31 and the auxiliary wheel disc 32 are sleeved with a belt 33 respectively, and the other ends of the two belts 33 are respectively on the main drive disc 34 and the auxiliary drive disc 35. The main wheel disc 31 is connected to the main drive disc 34 through the corresponding belt 33, and the auxiliary wheel disc 32 is connected to the main drive disc 34 through the corresponding belt 33. The main drive disk 34 and the auxiliary drive disk 35 are connected; support feet are respectively arranged on both sides of the main drive disk 34 and the auxiliary drive disk 35, and the bottom of the support feet is connected to a support plate, and the support feet cooperate with the support plate to improve the stability of the placement of the main drive disk 34 and the auxiliary drive disk 35; a rotating shaft 36 is connected between the main drive disk 34 and the auxiliary drive disk 35, and one end of the rotating shaft 36 passes through the interior of the main drive disk 34 and is connected to the motor 37; the motor 37 cooperates with the rotating shaft 36, which can not only drive the main drive disk 34 and the auxiliary drive disk 35 to rotate synchronously, but also ensure that the turntable 2 and its pipeline body 4 rotate synchronously Rotation, while reducing the cost of electricity use and resource waste; the two ends of the pipeline body 4 are respectively sleeved inside the two turntables 2, and a clamping mechanism 5 is respectively provided at the top of each bracket assembly 1, which is used to temporarily clamp the bracket assembly 1 and the turntable 2 inside it with the pipeline body 4. The clamping mechanism 5 includes a slide rail 51, a slider 52, a connecting plate 53, a gas rod 54 and a cylinder 55. The slide rail 51 is arranged on one side of the top of the bracket assembly 1, and the upper end surfaces on both sides of the slide rail 51 are respectively vertically provided with limit plates, and the slide rail 51 is sleeved with a slider 52, and the two sides of the slider 52 are symmetrically provided with connecting plates 53, each connecting A gas rod 54 is inserted into the interior of the plate 53. One end of the gas rod 54 passes through the connecting plate 53 and is sleeved with a connecting ring 541. The connecting ring 541 and the gas rod 54 are temporarily fastened by a rotating thread, and the other end of the gas rod 54 is connected to the cylinder 55. By locking the knob of the connecting ring 541 on one end of the gas rod 54, the gas rod 54 is limited to one side of the connecting plate 53. When it is necessary to open the clamping blocks 13 on both sides, the knob of the connecting ring 541 can be removed, and then the slider 52 can be pushed to the outside of the slide rail 51 to make the connecting plate 53 away from the gas rod 54. At this time, the clamping blocks 13 on both sides lose connection, so that they are folded to both sides.

[0023] For example, when testing the straight-segment pipe body 4, specifically, the two turntables 2 are respectively placed inside the bracket assemblies 1 on both sides, the main wheel disc 31 and the auxiliary wheel disc 32 of the rotating mechanism 3 are respectively sleeved on the two turntables 2, and then the two ends of the plurality of straight-segment pipe bodies 4 are respectively sleeved in the large through holes 21 and the small through holes 22 of the turntables 2 on both sides. The specific placement position can be selected according to the diameter of the straight-segment pipe body 4; after the plurality of straight-segment pipe bodies 4 are placed, the two cylinders 55 of the clamping mechanism 5 are started to provide driving force, and the cylinders 55 are used to drive the gas rods 54 connected thereto to pull the connecting plates 53 on both sides to move inward, and then the connecting plates 53 on both sides pull the middle slider 52 to move inward along the slide rail 51, thereby the clamping blocks 13 on both sides are clamped. The bracket assembly 1 is locked to form an integral whole; the turntable 2 at the other end and the bracket assembly 1 are operated according to the same steps, based on which the two turntables 2 are temporarily buckled in the bracket assemblies 1 at both ends; it should be noted that there is a certain gap between the turntable 2 and the inner wall of the clamping block 13 after being temporarily buckled, so that the turntable 2 can rotate; at this time, the motor 37 is started to provide driving force, and the motor 37 is used to drive the shaft 36 to drive the main drive disk 34 and the auxiliary drive disk 35 to rotate synchronously, and the main drive disk 34 and the auxiliary drive disk 35 respectively drive the main wheel disk 31 and the auxiliary wheel disk 32 to rotate synchronously with the help of the belt 33 sleeved therewith; based on this, the turntables 2 at both ends are respectively driven to rotate by the main wheel disk 31 and the auxiliary wheel disk 32, thereby driving the straight segment pipe body 4 sleeved by the turntable 2 to rotate synchronously.

[0024] In order to better demonstrate the operation process of a leakage test tool for a densely welded pipe group, the present invention provides an operation method of a leakage test tool for a densely welded pipe group, comprising the following steps: Step 1: Before testing, remove the connecting ring 541, push the slider 52 outward to make the connecting plate 53 away from the gas rod 54, place the turntable 2 in the semi-arc grooves 14 of the two clamping blocks 13, and then sleeve a plurality of pipe bodies 4 in the large through hole 21 and the small through hole 22 respectively; Step 2: Before testing, fold the clamping blocks 13 on both sides upwards, insert the gas rod 54 into the corresponding connecting plate 53, and sleeve the connecting ring 541 back, start the cylinder 55 to cause the gas rod 54 to pull the connecting plate 53 and the slider 52 to move inward along the slide rail 51, and temporarily lock the turntable 2 and its pipeline body 4 in the bracket assembly 1, and there is a certain gap between the turntable 2 and the inner wall of the clamping block 13 after being temporarily locked, so that the turntable 2 can rotate, and then operate the turntable 2 and the bracket assembly 1 at the other end according to the same steps; Step 3: Before testing, a leak detector 23 is installed on a certain pipe body 4, and in particular, the leak detector 23 can be installed at the weld position of the key pipe body 4; Step 4: Fill all test pipes with inert gas and temporarily seal the pipe ports with plugs or blind plates; Step 5: Start the motor 37 to drive the rotating shaft 36 to drive the main driving disk 34 and the auxiliary driving disk 35 to rotate synchronously. The main driving disk 34 and the auxiliary driving disk 35 drive the main wheel disk 31 and the auxiliary wheel disk 32 to rotate synchronously respectively by means of the belt 33. Based on this, the main wheel disk 31 and the auxiliary wheel disk 32 respectively drive the rotating disks 2 at both ends to rotate, and gradually the pipeline generates centrifugal force due to the rotation; Step 6: Under the action of the centrifugal force generated by the continuous rotation, the inert gas inside the pipeline body 4 generates pressure outside the pipeline. Based on this, the leakage detector 23 rotating with the pipeline performs continuous leakage detection on the pipeline, especially the weld position of the pipeline, in real time; Step 7: When the motor 37 is turned off and stops rotating, the air cylinder 55 is started to cause the air rod 54 to pull the connecting plate 53 and the slider 52 to move outward along the slide rail 51, then the connecting ring 541 is removed to move the air rod 54 out of the inside of the connecting plate 53, and the clamping blocks 13 on both sides are folded down to take out the turntable 2, take out the pipeline body 4, remove the leakage detector 23, and then operate the turntable 2 and the bracket assembly 1 at the other end according to the same steps.

[0025] The beneficial effects achieved by the above content are as follows: Through the above method, the pressure testing requirements of pipe section welds under the premise of narrow space caused by pipeline groups are met, the quality of welds is ensured, and it is in line with the development trend of industrialized construction in the construction industry; at the same time, the leakage detector can be used to realize synchronous leakage testing of multiple pipelines to improve work efficiency.

[0026] Working principle: by placing multiple pipe bodies 4 in the turntable 2, the turntable 2 is temporarily locked by the bracket assemblies 1 at both ends; the starting motor 37 drives the main drive disk 34 and the auxiliary drive disk 35 to rotate synchronously by using the rotating shaft 36, thereby driving the main wheel disk 31 and the auxiliary wheel disk 32 to rotate synchronously with the help of the belt 33, and the turntables 2 at both ends and the pipe bodies 4 inside them are driven by the main wheel disk 31 and the auxiliary wheel disk 32 to rotate and generate centrifugal force. Under the action of centrifugal force, the inert gas inside the pipe body 4 forms pressure on the pipe wall, and further cooperates with the leakage detector 23 to meet the purpose of pressure testing the weld of the pipe body 4.

[0027] The leak detector 23 in this embodiment can also be used for fluid testing. For example, a chemical test paper is set at the contact position of the weld between the leak detector 23 and the pipeline body 4, and the corresponding reagent is filled in the pipeline body 4. The centrifugal force during the rotation of the pipeline body 4 causes the reagent to exert pressure on the pipe wall of the pipeline body 4. The test paper at the weld position of the outer wall of the outer pipeline body 4 is further used to test whether the weld of the pipeline body 4 is leaking.

[0028] Furthermore, in some hazardous gas or precision industrial piping systems, even a slight gas leak can cause serious damage to life or property. For this reason, it is very necessary to test these piping systems for particulate matter before they are put into production.

[0029] Since the particle diameter of helium is very small, helium testing can detect very small leaks in the pipeline, which is conducive to leak testing of the above-mentioned precision industrial piping systems.

[0030] Based on the above reasons, if the leakage detector 23 in this embodiment is designated as a particle trap (or particle detector), it can be implemented as an effective means of performing helium testing on the pipeline. The general testing process is as follows: Step 1: pre-blow the pipeline to be tested for more than 1 hour to ensure that it meets the cleanliness requirements; Step 2: connect the pipeline to be tested to the leak test tool and fill it with helium for testing; Step 3: turn on the power supply, so that the leak test tool drives the pipeline to be tested to rotate and generates centrifugal force inside the pipeline, so that the helium continues to exert pressure on the pipe wall; Step 4: turn on the leak detector 23 (i.e., particle trap or particle detector) to start monitoring; Step 5: When the test time is reached, the leak detector 23 and the leak test tool are turned off in sequence; Step 6: Determine whether there is a helium leak by using the leak detector 23.

[0031] During the above helium leak test, the data must be qualified within 3 minutes of continuous operation to be valid. During the test, if the test data is unqualified, the data will be invalidated and retested until it is qualified; if the pipeline reason is eliminated and the data is still unqualified, the gas source should be checked to see if it is qualified.

[0032] In the above-mentioned helium test process, for the particle trap used as the leak detector 23, the particle test specifications are 0.1, 0.2, 0.3, 0.5, 1.0, 2.0, 3.0, 5.0; unit: um.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A leak testing tool for a densely welded pipe group, comprising a support assembly (1), a turntable (2), a rotating mechanism (3), a pipe body (4) and a clamping mechanism (5), characterized in that: Two support assemblies (1) are provided, each support assembly (1) is provided with a turntable (2) inside, the turntable (2) is sleeved with a rotating mechanism (3) outside, and is used to drive the turntable (2) to rotate, the two ends of the pipeline body (4) are sleeved inside the two turntables (2), and the top end of each support assembly (1) is provided with a clamping mechanism (5), and is used to temporarily clamp the support assembly (1) and the turntable (2) inside the support assembly (1) and the pipeline body (4).

2. The leak testing tool for a densely welded pipe group according to claim 1, characterized in that: The support assembly (1) comprises a base (11), a hinge (12), a clamping block (13) and a semi-arc groove (14), the hinges (12) being symmetrically arranged on both sides of the base (11), the clamping block (13) being symmetrically arranged on the upper end surface of the base (11), and the clamping block (13) being movably connected to the base (11) via the hinges (12) on both sides, and a semi-arc groove (14) is formed on the inner side of each clamping block (13), and a circular hole is formed by the semi-arc grooves (14) on both sides for sleeve-engaging the turntable (2).

3. The leak testing tool for a densely welded pipe group according to claim 1, characterized in that: A large through hole (21) is provided at the center of the turntable (2), and small through holes (22) are arranged around the periphery of the large through hole (21), wherein a detachable leak detector (23) is additionally arranged outside one of the small through holes (22), and the leak detector (23) has an annular insulating shell so as to be sleeved on the pipeline body (4), and has a built-in high-sensitivity gas sensor or particle trap, and can accurately detect a variety of harmful gases through the built-in high-sensitivity gas sensor or particle trap; the leak detector (23) is also equipped with a rechargeable lithium battery and a high-brightness LED light or a buzzer, and when it is detected that the gas concentration exceeds the standard, the indicator immediately activates an audible and visual alarm, and sends out an obvious alarm signal through the high-brightness LED light and the buzzer.

4. The leak testing tool for a densely welded pipe group according to claim 1, characterized in that: The rotating mechanism (3) comprises a main wheel disc (31), an auxiliary wheel disc (32), a belt (33), a main drive disc (34), an auxiliary drive disc (35), a rotating shaft (36) and a motor (37). The main wheel disc (31) and the auxiliary wheel disc (32) are respectively sleeved on the two rotating discs (2). The main wheel disc (31) and the auxiliary wheel disc (32) are respectively sleeved on a belt (33), and the other ends of the two belts (33) are respectively on the main drive disc (34) and the auxiliary drive disc (35). A rotating shaft (36) is connected between the main drive disc (34) and the auxiliary drive disc (35). One end of the rotating shaft (36) passes through the interior of the main drive disc (34) and is connected to the motor (37).

5. The leak testing tool for a densely welded pipe group according to claim 1, characterized in that: The clamping mechanism (5) comprises a slide rail (51), a slider (52), a connecting plate (53), a gas rod (54) and a cylinder (55). The slide rail (51) is arranged on one side of the top of the bracket assembly (1). The slider (52) is sleeved on the slide rail (51). Connecting plates (53) are symmetrically arranged on both sides of the slider (52). A gas rod (54) is inserted into the interior of each connecting plate (53). The other end of the gas rod (54) is connected to the cylinder (55).

6. The leak testing tool for a densely welded pipe group according to claim 3, characterized in that: A hard rubber protective layer is provided on the inner walls of the large through hole (21) and the small through hole (22) in the rotating disk (2), and the inner diameters of the large through hole (21) and the small through hole (22) are respectively matched to the outer diameter of the pipeline body (4).

7. The leak testing tool for a densely welded pipe group according to claim 4, characterized in that: Support feet are respectively provided on both sides of the main drive disk (34) and the auxiliary drive disk (35), and the bottoms of the support feet are connected to support plates.

8. The leak testing tool for a densely welded pipe group according to claim 5, characterized in that: One end of the gas rod (54) passing through the connecting plate (53) is sleeved with a connecting ring (541), and the connecting ring (541) and the gas rod (54) are temporarily fastened via a rotating thread.

9. The leak testing tool for a densely welded pipe group according to claim 5, characterized in that: Limiting plates are respectively vertically arranged on the upper end surfaces of both sides of the slide rail (51).

10. An operating method of a leakage testing tool for a densely welded pipe group according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Before testing, remove the connecting ring (541), push the slider (52) outward to move the connecting plate (53) away from the gas rod (54), place the turntable (2) in the semi-arc grooves (14) of the two clamping blocks (13), and then respectively sleeve a plurality of pipe bodies (4) into the large through hole (21) and the small through hole (22); Step 2: Before testing, fold the clamping blocks (13) on both sides upwards, insert the gas rod (54) into the corresponding connecting plate (53), and put it back on the connecting ring (541), start the cylinder (55) to make the gas rod (54) pull the connecting plate (53) and the slider (52) to move inward along the slide rail (51), and temporarily lock the turntable (2) and its pipeline body (4) in the bracket assembly (1), and there is a certain gap between the turntable (2) and the inner wall of the clamping block (13) after being temporarily locked, so that the turntable (2) and the bracket assembly (1) at the other end are operated according to the same steps; Step 3: Before testing, a leakage detector (23) is installed on a certain pipeline body (4), and in particular, the leakage detector (23) can be installed at a weld position of a key pipeline body (4); Step 4: Fill all test pipes with inert gas and temporarily seal the pipe ports with plugs or blind plates; Step 5: Start the motor (37) to drive the rotating shaft (36) to drive the main drive disc (34) and the auxiliary drive disc (35) to rotate synchronously. The main drive disc (34) and the auxiliary drive disc (35) respectively drive the main wheel disc (31) and the auxiliary wheel disc (32) to rotate synchronously by means of the belt (33). Based on this, the main wheel disc (31) and the auxiliary wheel disc (32) respectively drive the rotating discs (2) at both ends to rotate, so that the pipeline gradually generates centrifugal force due to the rotation; Step 6: Under the action of the centrifugal force generated by the continuous rotation, the inert gas inside the pipeline body (4) generates pressure outside the pipeline. Based on this, the leakage detector (23) rotating with the pipeline performs continuous leakage detection on the pipeline, especially the weld position of the pipeline, in real time; Step 7: When the motor (37) is turned off and stops rotating, the air cylinder (55) is started to cause the air rod (54) to pull the connecting plate (53) and the slider (52) to move outward along the slide rail (51), then the connecting ring (541) is removed to move the air rod (54) out of the inside of the connecting plate (53), and the clamping blocks (13) on both sides are folded downward to remove the turntable (2), remove the pipeline body (4), remove the leakage detector (23), and then operate the turntable (2) and the bracket assembly (1) at the other end according to the same steps.

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