CN118583403B - Air leakage detection system for pipeline - Google Patents
Air leakage detection system for pipeline Download PDFInfo
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- CN118583403B CN118583403B CN202410690680.8A CN202410690680A CN118583403B CN 118583403 B CN118583403 B CN 118583403B CN 202410690680 A CN202410690680 A CN 202410690680A CN 118583403 B CN118583403 B CN 118583403B
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- 238000001514 detection method Methods 0.000 title claims abstract description 109
- 238000007789 sealing Methods 0.000 claims abstract description 24
- 230000008093 supporting effect Effects 0.000 claims description 47
- 230000002457 bidirectional effect Effects 0.000 claims description 29
- 210000001503 joint Anatomy 0.000 claims description 16
- 230000000712 assembly Effects 0.000 claims description 5
- 238000000429 assembly Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 12
- 238000005452 bending Methods 0.000 description 7
- 238000003032 molecular docking Methods 0.000 description 7
- 230000033001 locomotion Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009957 hemming Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
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- Examining Or Testing Airtightness (AREA)
Abstract
The application relates to an air leakage detection system for a pipeline, and relates to the technical field of air tightness detection; the device comprises a sealing mechanism, an air supply piece, a controller, an air pressure detection module and an air flow detection module; the sealing mechanism is used for sealing two ends of the pipeline so as to form a hollow detection space inside the pipeline; the gas supply piece is used for conveying gas to the detection space; the air pressure detection module and the air flow detection module are electrically connected to the controller, the air pressure detection module is used for detecting air pressure data in the detection space, the air flow detection module is used for detecting air flow data in the detection space and/or at the end part of the pipeline, and the controller is used for acquiring and displaying the air pressure data and the air flow data; the application has the effect of realizing high-efficiency and accurate detection of the air leakage condition of the pipeline.
Description
Technical Field
The application relates to the technical field of pipeline air tightness detection, in particular to an air leakage detection system for a pipeline.
Background
The pipeline is a structure for conveying gas or other fluid media, can realize remote transportation, and is a quick and convenient transportation mode. In the actual production process of the pipeline, a sheet-shaped or plate-shaped raw material is generally molded into a pipeline mother board with a certain sizing degree and thickness by a rolling and bending method, and then welded to form a tubular structure after a plurality of steps such as hemming, pre-bending, submerged arc welding and the like.
After the production is finished, the production quality of the pipeline is generally required to be detected, such as detection of welding quality, but the current detection mode is generally performed in a manual visual detection mode, the detection mode is rough, the quality of welding quality generally influences the air tightness of the pipeline, and the manual visual detection mode cannot accurately detect whether the air leakage exists in the pipeline or not, so that improvement is needed.
Disclosure of Invention
In order to optimize the detection mode of the air tightness of the pipeline and improve the detection accuracy, the application provides an air leakage detection system for the pipeline.
The application provides an air leakage detection system for a pipeline, which comprises a sealing mechanism, an air supply piece, a controller, an air pressure detection module and an air flow detection module, wherein the air supply piece is connected with the controller; the sealing mechanism is used for sealing two ends of the pipeline so as to form a hollow detection space inside the pipeline; the gas supply piece is used for conveying gas to the detection space; the air pressure detection module and the air flow detection module are electrically connected to the controller, the air pressure detection module is used for detecting air pressure data in the detection space, the air flow detection module is used for detecting air flow data in the detection space and/or at the end part of the pipeline, and the controller is used for acquiring and displaying the air pressure data and the air flow data.
Through adopting above-mentioned technical scheme, when the pipeline air leakage condition is tested, utilize sealing mechanism to seal the pipeline, specifically seal pipeline both ends, so that the inside cavity position of pipeline forms the detection space, the gas is carried in to the detection space to the gas feed spare again, detect the atmospheric pressure condition in the detection space by atmospheric pressure detection module real time, show atmospheric pressure data by the controller, for the inspector decides when stopping the air feed according to atmospheric pressure data, if when atmospheric pressure data reaches appointed atmospheric pressure value, stop the gas feed spare and carry gas in the detection space, then utilize the gas flow detection module to detect the gas flow of detection space, and show this gas flow numerical value through the controller, for inspector observes and analyzes the gas flow data and judges whether the pipeline leaks out.
Preferably, the sealing mechanism comprises a frame, a support rod arranged on the frame, a baffle plate connected to the end part of the support rod in a sliding manner, and a sliding assembly for driving the baffle plate to slide; the pipeline is sleeved on the supporting rod, and the length direction of the supporting rod is parallel to the length direction of the pipeline; the diameter of the baffle is not smaller than the outer diameter of the pipeline, the sliding component is used for driving the baffle to move along the direction close to or far away from the pipeline, the moving direction of the baffle is parallel to the length direction of the support rod, and the baffle is used for being abutted to the end wall of the pipeline when being close to the pipeline.
Through adopting above-mentioned technical scheme, locate the pipeline cover that will wait to detect on the bracing piece, support the pipeline through the bracing piece, then utilize the subassembly that slides to drive the baffle and remove along the direction that is on a parallel with bracing piece length and be close to the pipeline gradually, until the butt in pipeline end wall to realize sealing to the pipeline.
Preferably, the side wall of the baffle, which faces the pipe, is provided with a flexible gasket for interference with the end wall of the pipe.
Through adopting above-mentioned technical scheme, when the setting of flexible sealing pad can alleviate pipeline and baffle and contradict on the one hand, the wearing and tearing of pipeline end wall, on the other hand also can improve the leakproofness of pipeline end wall and baffle lateral wall seam position, optimizes the air leakage detection effect to pipeline inside detection space.
Preferably, the sealing mechanism further comprises a driving piece and a plurality of groups of bearing assemblies, wherein the driving piece comprises a driving motor, a bidirectional screw rod connected with the driving end of the driving motor, and a sliding block connected with the bidirectional screw rod in a threaded manner; the length direction of the bidirectional screw rod is parallel to the length direction of the supporting rod, the bidirectional screw rod is rotationally connected to the supporting rod, the number of the sliding blocks is 2, the sliding blocks are connected to the supporting rod in a sliding manner, and the sliding directions of the sliding blocks in sliding during driving of the bidirectional screw rod are opposite;
the bearing assembly sets up on the bracing piece along bracing piece circumference, every bearing assembly all includes two connecting rods and a bearing piece, same two connecting rods that bearing assembly contained and slider one-to-one, one of them end of connecting rod articulates in corresponding slider, and the other end articulates in the bearing piece.
Through adopting above-mentioned technical scheme, because locate the pipeline cover on the bracing piece, the pipeline will make the inside roof of pipeline laminate in the surface of bracing piece top department under the dead weight effect, influence follow-up leak detection effect to the inside roof of pipeline, consequently, special bearing assembly is come along the radial removal pipeline of bracing piece, so that pipeline axis coincides mutually with the bracing piece, make the pipeline inner wall all not laminate mutually with the bracing piece, so that when follow-up air feed piece is to the inside gas of letting in of pipeline, the gas can contact with each position of whole pipeline inner wall, optimize the leak detection effect to the pipeline inner wall.
Preferably, the device further comprises a gas homogenizing component, wherein the gas homogenizing component is used for flaring the air flow in the detection space.
Through adopting above-mentioned technical scheme, when utilizing the air feed piece to carry gas in the detection space of pipeline, the accessible even gas subassembly is moved the air current in the detection space to make the gas by in the input detection space can more evenly distribute in the detection space, with the detection accuracy of the whole detection space that improves atmospheric pressure detection module and air flow detection module.
Preferably, the air homogenizing component comprises a butt joint rod, a gear, a rack and an air homogenizing plate, wherein the butt joint rod is rotationally connected to the sliding block, the gear is fixedly sleeved on the butt joint rod, and the air homogenizing plate is connected to the butt joint rod; the rack is arranged on the support rod, the length direction of the rack is parallel to the sliding direction of the sliding block, and the gear is meshed with the rack.
Through adopting above-mentioned technical scheme, when the baffle butt in pipeline both ends, can utilize the baffle to realize the support to the pipeline to the clamping force of pipeline, accessible driving motor drives two-way lead screw and rotates this moment to make slider reciprocating motion, and at slider reciprocating motion in-process, even gas piece will swing under the transmission effect of gear and rack, thereby play the even gas effect of flaring air current.
Preferably, the length between one end of the gas homogenizing plate far away from the butt joint rod and the butt joint rod is adjustable.
By adopting the technical scheme, the distance between the end of the gas homogenizing plate, which is far away from the butt joint rod, and the butt joint rod can be adjusted according to the diameter of the pipeline, and the distance is = (the diameter of the pipeline-the butt joint rod)/2; so as to ensure that the gas homogenizing plate can furthest expand the gas in the detection space on the premise that the inner wall of the pipeline does not block the rotation of the gas homogenizing plate.
Preferably, a supporting block is slidingly connected to the side wall of the baffle on one side, facing the supporting rod, along the radial direction of the baffle, and when the baffle is attached to the end wall of the pipeline, the inner wall of the pipeline is positioned on the sliding path of the supporting block; the baffle is provided with a sliding piece for driving the supporting block to slide and fixing the sliding position of the supporting block, the sliding piece is controlled by a controller, and the controller is used for controlling the sliding piece to slide towards a direction close to or far away from the inner wall of the pipeline.
Through adopting above-mentioned technical scheme, in order to optimize the supporting effect of baffle to the pipeline, the accessible slider drives the supporting shoe and removes to the position of laminating in the pipeline inner wall to spacing to the pipeline through the supporting shoe, the cooperation baffle is to the centre gripping effect of pipeline tip, realizes the support to the pipeline jointly.
Preferably, the air supply piece comprises a plurality of fans distributed along the circumferential direction of the baffle plate, the air outlets of the fans face the detection space, and the fans are rotationally connected to the baffle plate; the baffle is also provided with a rotating piece for driving the fan to rotate.
Through adopting above-mentioned technical scheme, when blowing the air in to detecting the space through the fan, drive the fan through rotating the piece and rotate to switch fan wind gap orientation, further improve even gas effect.
Preferably, a reset torsion spring and a linkage deflector rod are arranged at the rotation connecting center of the fan and the baffle, and the rotation piece comprises a linkage rod, an extension rod and a reset spring; the linkage rod is connected to one end of the bidirectional screw rod, which is far away from the driving motor, and one side of the linkage rod, which is far away from the bidirectional screw rod, is rotationally connected to one side of the baffle along with the rotation of the bidirectional screw rod; the extension rods, the fans and the reset springs are arranged in one-to-one correspondence, the extension rods are connected to the baffle plate in a sliding manner through the corresponding reset springs, when the reset springs and the reset torsion springs are not deformed, one end of each extension rod is located on a rotating path when the linkage rod rotates along with the bidirectional screw rod, and the linkage deflector rod is located on a sliding path at the other end of each extension rod; when the linkage rod rotates to be abutted against any extension rod, the abutted extension rod moves towards the direction close to the corresponding fan and abuts against the linkage deflector rod of the corresponding fan, so that the fan rotates.
Through adopting above-mentioned technical scheme, when driving motor drives two-way lead screw and rotates, the gangbar will rotate along with the rotation of two-way lead screw to contradict the extension rod in the rotation process, so that the extension rod that receives the conflict removes and contradicts the linkage driving lever of fan towards the direction that is close to the fan, finally makes the fan rotate, and when the gangbar rotates and releases the conflict to the extension rod, the extension rod will be moved towards the direction of keeping away from the fan under reset spring's elasticity effect, so that the fan rotates the reset under reset torsion spring's elasticity effect.
In summary, the application has the following beneficial technical effects:
When the pipeline air leakage condition is tested, the pipeline is sealed by the sealing mechanism, so that a detection space is formed in the hollow part inside the pipeline, then the air supply piece is used for conveying air into the detection space, the air pressure detection module is used for detecting the air pressure condition in the detection space in real time, the controller is used for displaying air pressure data, so that a detector can determine when to stop air supply according to the air pressure data, if the air pressure data reach a specified air pressure value, the air supply piece is stopped for conveying air into the detection space, then the air flow detection module is used for detecting the air flow in the detection space, and the controller is used for displaying the air flow value, so that the detector can observe and analyze the air flow data to judge whether the pipeline leaks air or not, and the air leakage detection of the pipeline is realized.
Drawings
Fig. 1 is a schematic structural view of a system for detecting leakage air for a duct, in which a duct is installed according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of an air leakage detection system for a pipeline according to an embodiment of the present application.
Fig. 3 is a cross-sectional view taken along the direction A-A in fig. 1.
Fig. 4 is a schematic diagram of a structure at a baffle for embodying an embodiment of the present application.
Fig. 5 is an enlarged schematic view of the structure at B in fig. 3.
Fig. 6 is a schematic diagram of a structure of a gas homogenizing assembly according to an embodiment of the present application.
Reference numerals illustrate: 1. a sealing mechanism; 11. a frame; 12. a support rod; 13. a baffle; 131. a fixing plate; 132. a movable plate; 133. a telescoping member; 134. a flexible gasket; 135. a support block; 136. a sliding member; 14. a slip assembly; 15. a driving member; 151. a two-way screw rod; 152. a slide block; 153. a driving motor; 16. a support assembly; 161. a support block; 162. a connecting rod; 2. a gas supply member; 21. a blower; 22. a reset torsion spring; 23. a linkage deflector rod; 24. a rotating member; 241. a linkage rod; 242. an extension rod; 243. a return spring; 3. a controller; 4. an air pressure detection module; 5. a gas flow detection module; 6. a pipe; 7. a gas homogenizing component; 71. a butt joint rod; 72. a gear; 73. a rack; 74. and (3) a qi homogenizing tablet.
Detailed Description
The application is described in further detail below with reference to fig. 1-6.
The embodiment of the application discloses an air leakage detection system for a pipeline. Referring to fig. 1,2 and 3, the air leakage detection system for a pipeline includes a sealing mechanism 1, an air supply member 2, a controller 3, an air pressure detection module 4 and an air flow rate detection module 5; the sealing mechanism 1 is used for plugging the end part of the pipeline 6 to be tested, so that a detection space is formed in the hollow part inside the pipeline 6, the air supply piece 2 is used for conveying air into the detection space, the air pressure detection module 4 is used for detecting air pressure data in the detection space, the air flow detection module 5 is used for detecting air flow data in the detection space and/or the pipeline 6, the controller 3 can be a PLC (programmable logic controller), the air supply piece 2, the air pressure detection module 4 and the air flow detection module 5 are all electrically connected to the controller 3, the controller 3 is used for acquiring the air pressure data and the air flow data, and stopping the air supply of the air supply piece 2 to the detection space when the air pressure data reach a specified air pressure value, and the controller 3 is also used for displaying the air pressure data and the air flow data on a preset display screen.
Referring to figures 1,2 and 3, the sealing mechanism 1 comprises a frame 11, a support bar 12, a baffle 13, a slip assembly 14, a drive member 15 and sets of support assemblies 16. Baffle 13 specifically divide into fixed plate 131 and fly leaf 132, and fixed plate 131 fixed connection is provided with expansion piece 133 on frame 11, and the expansion piece 133 specifically is the inserted bar of sliding connection in the bracing piece 12 tip along bracing piece 12 length direction, and bracing piece 12 tip passes through bolt and inserted bar fixed connection to be used for adjusting the distance between bracing piece 12 and the fixed plate 131. The movable plate 132 is located at one end of the support rod 12 far away from the fixed plate 131, and flexible sealing gaskets 134 are fixedly adhered to side walls of one side of the movable plate 132 and one side of the fixed plate 131 facing the support rod 12, wherein the flexible sealing gaskets 134 can be made of rubber; the movable plate 132 is slidably connected to the frame 11, the sliding direction of the movable plate 132 is parallel to the length direction of the support rod 12, the sliding component 14 is used for driving the movable plate 132 to slide, and the sliding component 14 can be specifically a combined structure of motor screw rods.
Referring to fig. 2 and 3, the air pressure detecting modules 4 may be several and uniformly distributed on the side walls of the support rods 12, and the air flow detecting modules 5 may be several and mounted on the side walls of the fixed plate 131 and the movable plate 132; when the air pressure data of all the air pressure detection modules 4 reach the specified air pressure value, the air pressure data in the detection space is considered to reach the specified air pressure value, and the controller 3 closes the air supply member 2.
Referring to fig. 2 and 3, the driving member 15 includes a bidirectional screw rod 151 rotatably connected to the support rod 12, a slider 152 screwed on the bidirectional screw rod 151, and a driving motor 153 for driving the bidirectional screw rod 151 to rotate, wherein the driving motor 153 is embedded in the support rod 12, and the driving motor 153 is electrically connected to the controller 3. The bidirectional screw rod 151 is arranged along the length direction of the supporting rod 12, the number of the sliding blocks 152 is 2, the sliding blocks 152 are connected to the supporting rod 12 in a sliding manner along the direction parallel to the supporting rod 12, and the sliding directions of the two sliding blocks 152 under the rotation driving of the bidirectional screw rod 151 are opposite.
Referring to fig. 2 and 3, the bearing assembly 16 is uniformly arranged on the support bar 12 along the circumferential direction of the support bar 12, the bearing assembly 16 comprises a bearing block 161 and two connecting rods 162, one end of each connecting rod 162 is hinged with the sliding block 152, the other end is hinged with the bearing block 161, and the sliding blocks 152 hinged with the two connecting rods 162 of the same bearing assembly 16 are different; when the two sliding blocks 152 move towards each other, the supporting blocks 135 are driven by the connecting rods 162 to move towards the direction approaching the inner wall of the pipeline 6, so that the pipeline 6 can be pushed by all the bearing assemblies 16 together, so that the pipeline 6 moves along the direction parallel to the radial direction of the supporting rods 12 until the central axis of the pipeline 6 coincides with the supporting rods 12, i.e. all the bearing blocks 161 simultaneously abut against the inner wall of the pipeline 6. It should be noted that, the movement stroke of the supporting block 161 may be calculated in advance according to the diameter of the pipe 6 and the diameter of the supporting rod 12, so that the final movement position of the two sliding blocks 152 may be combined with the initial position before the sliding blocks 152 are not moved to obtain the rotation direction and the rotation duration of the driving shaft of the driving motor 153, and the controller 3 controls the rotation and the start and stop of the driving motor 153. The initial position of the slider 152 may be a preset slider 152 position.
Referring to fig. 3, 4 and 5, the air supply member 2 specifically includes a plurality of fans 21, and the fans 21 are configured to draw air from a side of the fixing plate 131 facing away from the support rod 12 into the detection space. The fans 21 are uniformly distributed on one side of the fixing plate 131 facing the support rod 12 along the circumferential direction of the fixing plate 131, and the air outlets of the fans 21 face the detection space; the fan 21 is rotatably connected to the side wall of the fixed plate 131 through a rotating shaft, and a reset torsion spring 22 is sleeved on the rotating shaft, one end of the reset torsion spring 22 is connected to the rotating shaft, and the other end of the reset torsion spring is connected to the fixed plate 131; the rotating shaft is also fixedly connected with a linkage deflector rod 23.
Referring to fig. 4 and 5, the fixing plate 131 is further provided with a rotating member 24 for driving the blower 21 to rotate about a rotation axis, and the rotating member 24 specifically includes a link lever 241, an extension lever 242, and a return spring 243; the linkage rod 241 is in an L shape, the linkage rod 241 comprises a telescopic part and a bending part, the telescopic part is telescopic, the telescopic part penetrates through the telescopic part 133 and is fixedly connected to the end part of the bidirectional screw rod 151, the telescopic part can rotate along with the rotation of the bidirectional screw rod 151, and the length direction of the telescopic part, the length direction of the bidirectional screw rod 151 and the length direction of the telescopic part 133 are parallel; the bending part is arranged at one end of the telescopic part away from the bidirectional screw rod 151, and the bending part is positioned at the center of the fixed plate 131.
Referring to fig. 4 and 5, the extension rods 242, the return springs 243 and the blower 21 are arranged in one-to-one correspondence, one end of each return spring 243 is fixedly connected to the corresponding extension rod 242, the other end of each return spring 243 is fixedly connected to the fixed plate 131, and the extension rods 242 are slidably connected to the fixed plate 131 through the return springs 243; when the return spring 243 and the return torsion spring 22 are not deformed, one end of the extension rod 242 is located on the rotating path when the bending part rotates along with the bidirectional screw rod 151, the linkage deflector 23 is located on the sliding path at the other end of the extension rod 242, and when the bending part rotates and presses any extension rod 242, the pressed extension rod 242 moves towards the direction approaching to the corresponding fan 21 and pushes the linkage deflector 23 in the moving process, so that the linkage deflector 23 drives the rotating shaft to rotate, and the corresponding fan 21 rotates.
Referring to fig. 3, the fixed plate 131 and/or the movable plate 132 are/is further slidably connected to the supporting block 135 toward one side wall of the supporting rod 12, the sliding direction of the supporting block 135 is parallel to the supporting rod 12, the sliding member 136 for driving the supporting block 135 to slide is arranged on the baffle 13, the sliding member 136 specifically comprises a combined structure of a motor screw and a ranging sensor, the ranging sensor is embedded in the side wall of the supporting block 135, the ranging sensor is used for detecting the distance between the ranging sensor and the inner wall of the pipeline 6, and the combined structure of the motor screw is used for driving the supporting block 135 to slide in a direction close to or far away from the inner wall of the pipeline 6. The sliding piece 136 is controlled by the controller 3, and the controller 3 is used for acquiring the distance value detected by the distance measuring sensor and controlling the start and stop of the motor screw rod combined structure so that the supporting block 135 can move to a position attached to the inner wall of the pipeline 6.
Referring to fig. 6, the air homogenizing component 7 is further included, the air homogenizing component 7 includes docking rods 71, gears 72, racks 73 and air homogenizing sheets 74, the docking rods 71 can be arranged in one-to-one correspondence with the connecting rods 162, the docking rods 71 are rotatably connected to the sliding blocks 152, each docking rod 71 corresponds to at least one gear 72 and at least one air homogenizing sheet 74, the gears 72 are fixedly sleeved on the corresponding docking rod 71, one end of each air homogenizing sheet 74 is fixedly connected to the docking rod 71, and the other end of each air homogenizing sheet is of a telescopic structure; the air homogenizing plate 74 is located at the periphery of the support rod 12, so as to prevent the support rod 12 from obstructing the rotation of the air homogenizing plate 74 when the air homogenizing plate 74 rotates along with the docking rod 71. The rack 73 is disposed on the support rod 12, the length direction of the rack 73 is parallel to the length direction of the support rod 12, and the gear 72 is engaged with the rack 73.
The embodiment of the application provides an implementation principle of an air leakage detection system for a pipeline, which comprises the following steps: the length of the telescopic piece 133 is adjusted in advance according to the length of the pipeline 6, so that the sum of the telescopic piece 133 and the supporting rod 12 is not smaller than the length of the pipeline 6; then the pipeline 6 is sleeved on the supporting rod 12, the pipeline 6 is driven to move through the bearing assembly 16, so that all the supporting blocks 135 stop moving when being moved to a position attached to the inner wall of the pipeline 6, and then the movable plate 132 is driven to move towards a direction close to the pipeline 6 through the sliding assembly 14 until the movable plate 132 and the fixed plate 131 are both abutted to the end wall of the pipeline 6, and then the movable plate 132 stops moving, so that sealing is realized; then, the sliding piece 136 is started to drive the supporting block 135 to be attached to the inner wall of the pipeline 6, then the air supply piece 2 is started to convey air into the detection space, and meanwhile, the controller 3 controls the driving motor to drive the bidirectional screw rod 151 to rotate in a forward and backward reciprocating manner, so that the sliding block 152 slides in a reciprocating manner, and the air homogenizing piece 74 swings in a reciprocating manner to prompt air flow; at the same time, the air pressure data is detected by the air pressure detection module 4, the air flow data is detected by the air flow detection module 5, the air pressure data and the air flow data are displayed in real time by the controller 3, and when the air pressure data reach the specified air pressure value, the controller 3 controls the air supply piece 2 to stop delivering air into the detection space.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (6)
1. The utility model provides a leak detection system for pipeline which characterized in that: comprises a sealing mechanism (1), an air supply piece (2), a controller (3), an air pressure detection module (4) and an air flow detection module (5); the sealing mechanism (1) is used for plugging two ends of the pipeline (6) so as to enable a hollow detection space to be formed inside the pipeline (6); the gas supply piece (2) is used for conveying gas to the detection space; the air pressure detection module (4) and the air flow detection module (5) are electrically connected to the controller (3), the air pressure detection module (4) is used for detecting air pressure data in the detection space, the air flow detection module (5) is used for detecting air flow data in the detection space and/or at the end part of the pipeline (6), and the controller (3) is used for acquiring and displaying the air pressure data and the air flow data;
The sealing mechanism (1) comprises a frame (11), a supporting rod (12) arranged on the frame (11), a baffle (13) connected to the end part of the supporting rod (12) in a sliding manner, and a sliding assembly (14) for driving the baffle (13) to slide; the pipeline (6) is sleeved on the supporting rod (12), and the length direction of the supporting rod (12) is parallel to the length direction of the pipeline (6); the diameter of the baffle plate (13) is not smaller than the outer diameter of the pipeline (6), the sliding assembly (14) is used for driving the baffle plate (13) to move in a direction approaching or separating from the pipeline (6), the moving direction of the baffle plate (13) is parallel to the length direction of the supporting rod (12), and the baffle plate (13) is used for abutting against the end wall of the pipeline (6) when approaching the pipeline (6);
The sealing mechanism (1) further comprises a driving piece (15) and a plurality of groups of bearing assemblies (16), wherein the driving piece (15) comprises a driving motor (153), a bidirectional screw rod (151) connected with the driving end of the driving motor (153), and a sliding block (152) connected with the bidirectional screw rod (151) in a threaded manner; the length direction of the bidirectional screw rod (151) is parallel to the length direction of the supporting rod (12), the bidirectional screw rod (151) is rotationally connected to the supporting rod (12), the number of the sliding blocks (152) is 2, the sliding blocks (152) are slidingly connected to the supporting rod (12), and the sliding directions of the sliding blocks (152) when the bidirectional screw rod (151) is driven are opposite;
The bearing assemblies (16) are circumferentially arranged on the supporting rods (12) along the supporting rods (12), each bearing assembly (16) comprises two connecting rods (162) and a bearing block (161), the two connecting rods (162) contained in the same bearing assembly (16) are in one-to-one correspondence with the sliding blocks (152), one end of each connecting rod (162) is hinged to the corresponding sliding block (152), and the other end of each connecting rod (162) is hinged to the corresponding bearing block (161);
The device also comprises a gas homogenizing component (7), wherein the gas homogenizing component (7) is used for flaring the air flow in the detection space;
The air homogenizing component (7) comprises a butt joint rod (71), a gear (72), a rack (73) and an air homogenizing sheet (74), wherein the butt joint rod (71) is rotationally connected to the sliding block (152), the gear (72) is fixedly sleeved on the butt joint rod (71), and the air homogenizing sheet (74) is connected to the butt joint rod (71); the rack (73) is arranged on the support rod (12), the length direction of the rack (73) is parallel to the sliding direction of the sliding block (152), and the gear (72) is meshed with the rack (73).
2. The air leakage detection system for a pipe according to claim 1, wherein: the side wall of the baffle plate (13) facing the pipeline (6) is provided with a flexible sealing gasket (134) for abutting against the end wall of the pipeline (6).
3. The air leakage detection system for a pipe according to claim 1, wherein: the length between one end of the air homogenizing plate (74) far away from the butt joint rod (71) and the butt joint rod (71) is adjustable.
4. The air leakage detection system for a pipe according to claim 1, wherein: the baffle (13) is connected with a supporting block (135) towards one side wall of the support rod (12) along the radial sliding of the baffle (13), and when the baffle (13) is attached to the end wall of the pipeline (6), the inner wall of the pipeline (6) is positioned on the sliding path of the supporting block (135); the baffle (13) is provided with a sliding piece (136) for driving the supporting block (135) to slide and fixing the sliding position of the supporting block (135), the sliding piece (136) is controlled by the controller (3), and the controller (3) is used for controlling the sliding piece (136) to slide towards a direction close to or far away from the inner wall of the pipeline (6).
5. The air leakage detection system for a pipe according to claim 1, wherein: the air supply piece (2) comprises a plurality of fans (21) which are circumferentially distributed along the baffle plate (13), the air outlets of the fans (21) face the detection space, and the fans (21) are rotationally connected to the baffle plate (13); the baffle (13) is also provided with a rotating piece (24) for driving the fan (21) to rotate.
6. The air leakage detection system for a pipe according to claim 5, wherein: a reset torsion spring (22) and a linkage deflector rod (23) are arranged at the rotation connecting center of the fan (21) and the baffle plate (13), and the rotating piece (24) comprises a linkage rod (241), an extension rod (242) and a reset spring (243); the linkage rod (241) is connected to one end of the bidirectional screw rod (151) away from the driving motor (153), and one side of the linkage rod (241) away from the bidirectional screw rod (151) is rotationally connected to one side of the baffle (13) along with the rotation of the bidirectional screw rod (151);
The extension rods (242), the fans (21) and the reset springs (243) are arranged in a one-to-one correspondence manner, the extension rods (242) are connected to the baffle plate (13) in a sliding manner through the corresponding reset springs (243), when the reset springs (243) and the reset torsion springs (22) are not deformed, one end of each extension rod (242) is located on a rotating path when the linkage rod (241) rotates along with the bidirectional screw rod (151), and the linkage deflector rod (23) is located on a sliding path at the other end of each extension rod (242); when the linkage rod (241) rotates to be abutted against any extension rod (242), the abutted extension rod (242) moves towards the direction approaching the corresponding fan (21) and abuts against the linkage deflector rod (23) of the corresponding fan (21) so as to enable the fan (21) to rotate.
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| CN113523695A (en) * | 2021-09-09 | 2021-10-22 | 点夺机电工程江苏有限公司 | Three-way pipe welding equipment with self sealss detect function |
| CN114910220A (en) * | 2022-05-10 | 2022-08-16 | 中铁八局集团第一工程有限公司 | Plateau tunnel ventilation hose air leakage detection device and method based on visual identification |
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| JP3203526B2 (en) * | 1993-01-21 | 2001-08-27 | 株式会社生野製作所 | Airtightness inspection method and device |
| WO1995003526A1 (en) * | 1993-07-20 | 1995-02-02 | Commonwealth Scientific And Industrial Research Organisation | An inspection system for a conduit |
| US7845211B2 (en) * | 2004-03-02 | 2010-12-07 | Car-Ber Investments Inc. | Apparatus and method for forming and testing lengths of pipe |
| CN213120985U (en) * | 2020-09-04 | 2021-05-04 | 福建省建诚工程咨询有限公司 | Air supply equipment for detecting air tightness of doors and windows |
| CN113804365A (en) * | 2021-10-14 | 2021-12-17 | 迈得医疗工业设备股份有限公司 | Plugging and leakage detecting structure and plugging and leakage detecting method |
| CN219391271U (en) * | 2023-03-17 | 2023-07-21 | 董鉴辉 | Detection device for pressure pipeline leakage |
| CN116772032A (en) * | 2023-06-28 | 2023-09-19 | 中国石油大学(北京) | Detection robot in pipeline |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113523695A (en) * | 2021-09-09 | 2021-10-22 | 点夺机电工程江苏有限公司 | Three-way pipe welding equipment with self sealss detect function |
| CN114910220A (en) * | 2022-05-10 | 2022-08-16 | 中铁八局集团第一工程有限公司 | Plateau tunnel ventilation hose air leakage detection device and method based on visual identification |
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