A gas leakage metering device for use between pipelines

Abstract

The present invention relates to the field of gas leakage detection, and in particular to a gas leakage metering device used between pipelines. Existing equipment is difficult to adapt to gas leakage detection of pipelines of multiple specifications; during the detection process, the gas sensor may collide with the flange, affecting the accuracy and increasing the risk of damage; the sensor position offset may also lead to missed detection, affecting the accuracy and coverage of the detection. A gas leakage metering device used between pipelines, including a lower plate; two female buckles are installed on one side of the lower plate, and two male buckles are installed on one side of the upper plate, and the two female buckles and the two male buckles can be buckled with each other. The present invention starts the two output shafts on the dual-axis motor to rotate forward and reverse, driving the two gears to rotate forward and reverse synchronously, and the gears drive the arc rack and the upper arc slide to move back and forth along the arc track. The two gas sensors sense the changes in gas concentration at the joints in real time, capture the leakage characteristic signals and output the detection data, and accurately locate the leakage point through high-sensitivity sensing technology.

Description

Technical Field

[0001] The invention relates to the field of gas leakage detection, and in particular to a gas leakage metering device used between pipelines. Background Art

[0002] Pipeline gas leak detection is critical to safety, environmental protection and economic benefits; leaks may cause accidents, pollute the environment, waste resources, and damage equipment; timely detection can prevent safety hazards, reduce energy loss, and extend equipment life.

[0003] Currently, pipelines and flanges are of various specifications, and existing equipment is difficult to adapt to gas leak detection in pipelines of different specifications. At the same time, the gas sensor is prone to collision with the flange during the detection process, which not only affects the detection accuracy but may also damage the sensor. In addition, the gas sensor may be close or far away during detection, causing the gas sensor to deviate from the flange joint, thereby increasing the risk of missed detection and possibly affecting the accuracy and coverage of the detection. Summary of the invention

[0004] In order to overcome the shortcomings that existing equipment is difficult to adapt to gas leakage detection of pipelines of multiple specifications; the gas sensor may collide with the flange during the detection process, affecting the accuracy and increasing the risk of damage; the sensor position offset may also lead to missed detection, affecting the accuracy and coverage of the detection, the purpose of the present invention is to provide a gas leakage metering device for use between pipelines, which can meet the gas leakage detection needs of pipelines and flanges of different specifications; the gas sensor can move accurately along the joints to avoid offset problems and effectively reduce the risk of missed detection; direct contact between the sensor and the flange is avoided during the detection process, reducing wear and improving detection accuracy; the stability of the detection process can be ensured, and the accuracy, coverage and reliability of the detection are improved.

[0005] Technical solution: A gas leakage metering device for use between pipelines, comprising a lower plate, two female buckles are installed on one side of the lower plate, two male buckles are installed on one side of the upper plate, the two female buckles and the two male buckles can be buckled with each other, two hinges are connected between the other sides of the lower plate and the upper plate, a driving mechanism and a centering mechanism are provided on the lower plate and the upper plate, the centering mechanism is used to center the pipeline body, a detection mechanism is provided on the driving mechanism, and the detection mechanism is used to detect gas leakage between the flanges.

[0006] As an improvement of the above scheme, the driving mechanism includes an upper guide block, an upper guide block is installed on the top of the upper plate, an upper arc-shaped slide bar is slidably provided on the upper guide block, a lower guide block is installed on the bottom of the lower plate, a lower arc-shaped slide bar is slidably provided on the lower guide block, an arc-shaped rack is installed on both sides of the upper arc-shaped slide bar, a dual-axis motor is installed on the top of the upper plate, a gear is installed on the two output shafts of the dual-axis motor, the two gears are meshed with the two arc-shaped racks, a protective cover is installed on the top of the upper plate, and the dual-axis motor and the two gears are located inside the protective cover.

[0007] As an improvement on the above scheme, the centering mechanism includes a centering rod, four centering rods are slidably provided on the lower plate and the upper plate respectively, a roller is rotatably provided on the side of the eight centering rods away from each other, two sliding plates are slidably provided on the lower plate and the upper plate respectively, there are four sliding plates in total, each sliding plate has two arc grooves, eight rollers are respectively located in the eight arc grooves, a threaded rack is installed between the two sliding plates on the lower plate, a threaded rack is also installed between the two sliding plates on the upper plate, both threaded racks are connected with a fastening bolt through a thread, and one side of the two fastening bolts are respectively in contact with one side of the lower plate and the upper plate.

[0008] As an improvement of the above scheme, the detection mechanism includes an outer square rod, and an outer square rod is slidably provided on the side where the upper arc slide bar and the lower arc slide bar are close to each other, and an outer spring is connected between the upper arc slide bar and the lower arc slide bar on the sides where the two outer square rods are away from each other, respectively. An inner square rod is slidably provided on the side where the two outer square rods are close to each other, and an inner spring is connected between the two outer rods on the sides where the two inner square rods are away from each other, and a gas sensor is installed on the side where the two inner square rods are close to each other, and the sides where the two gas sensors are close to each other are in contact with the gap between the two flanges.

[0009] As an improvement of the above scheme, it also includes a lifting mechanism arranged on the lower plate, the upper plate and the detection mechanism, the lifting mechanism is used to lift the gas sensor, the lifting mechanism includes a sleeve, a sleeve is respectively installed on the two opposite sides of the two outer rods, a clamping rod is slidably provided in the two sleeves, the two clamping rods are symmetrically arranged, a clamping spring is respectively connected between the two clamping rods and the two sleeves, a ball is provided at the ends of the two clamping rods away from each other, an arc limit frame is respectively installed on the two side surfaces of the lower plate and the upper plate, there are four arc limit frames in total, each arc limit frame has a guide groove, a groove is provided in the middle of the guide groove on the arc limit frame, the four sleeves are respectively located in the grooves in the middle of the guide grooves on the four arc limit frames, an arc top plate is installed on the side of the two arc limit frames on the lower plate away from each other, an inclined surface and a straight surface are provided on the side of the two arc top plates close to each other, the two arc top plates are symmetrically arranged, and each ball contacts the inclined surface on the arc top plate respectively.

[0010] As an improvement to the above solution, the elastic coefficient of the outer spring is greater than the elastic coefficient of the inner spring.

[0011] As an improvement of the above scheme, it also includes a positioning mechanism arranged on the lower guide block and the lower arc-shaped slide bar, the positioning mechanism is used to position the lower guide block and the lower arc-shaped slide bar, a movable magnet is installed in the middle of the lower arc-shaped slide bar, and a fixed magnet is installed on the side of the lower guide block close to the lower arc-shaped slide bar.

[0012] As an improvement to the above solution, the magnetic properties of the movable magnet and the fixed magnet on the sides close to each other are opposite, and the movable magnet and the fixed magnet are attracted to each other.

[0013] As an improvement of the above scheme, it also includes a fixing frame, each of the two gas sensors is equipped with a fixing frame, and two rollers are rotatably provided on one side of the two fixing frames close to each other, and the rollers are in contact with the flange.

[0014] As an improvement of the above scheme, it also includes scale bars, and two scale bars are respectively installed on the outer side surfaces of the lower plate and the upper plate, and the four scale bars are respectively aligned with one side of the four sliding plates.

[0015] The present invention has the following advantages: 1. Through the contact between the two gas sensors and the flange joint, the inner square rod slides in the outer square rod under the action of the inner spring, driving the gas sensor to move, so that the gas sensor can adapt to flanges of different diameters. The operator starts the two output shafts on the dual-axis motor to rotate forward and reversely, driving the two gears to rotate forward and reverse synchronously. The gears drive the arc rack and the upper arc slide bar to move back and forth along the arc track. The upper guide block provides a guiding effect to ensure that the upper arc slide bar moves smoothly, and at the same time, the lower arc slide bar moves synchronously in linkage. Under the guidance of the lower guide block, the lower arc slide bar maintains stable operation; the upper arc slide bar and the lower arc slide bar drive the outer square rod, the outer spring, the inner square rod, the inner spring and the gas sensor to move back and forth accurately along the flange joint. The two gas sensors sense the changes in gas concentration at the joint in real time, capture leakage characteristic signals and output detection data. The leakage point is accurately located through high-sensitivity sensing technology, and comprehensive, accurate and efficient detection of gas leakage in the flange joint is achieved.

[0016] 2. When the upper arc slide bar and the lower arc slide bar move back and forth, they drive the four sleeves to move out of the middle groove of the guide groove on the four arc limit frames into the guide groove. When the sleeve is not completely moved out of the groove, the four balls move from the inclined surface on the arc top plate to the straight surface, driving the four clamping rods to move inward and stretching the four clamping springs. After the four clamping rods are in close contact with the two inner square rods, the inner square rods are fixed to limit the expansion and contraction of the inner springs, thereby fixing the positions of the two gas sensors; when the sleeve is completely moved out of the groove, the two gas sensors move away from each other under the action of the guide groove of the arc limit frame, and move a certain distance on the flange, effectively avoiding long-term friction between the gas sensor and the flange, reducing sensor wear, and preventing debris, surface scratches or air tightness abnormalities caused by friction from interfering with the detection accuracy, ensuring that the gas sensor accurately captures the leakage signal, improves the detection sensitivity and reliability, and at the same time extends the service life of the sensor, ensuring the efficiency and integrity of the flange joint gas leakage detection.

[0017] 3. The interaction between the lower arc-shaped slide bar, the movable magnet and the fixed magnet realizes the limitation and positioning of the lower arc-shaped slide bar and the gas sensor, effectively avoiding shaking; the gas sensor moves through the fixed frame and the roller to avoid direct contact with the flange, prevent sensor damage and extend the service life; the position observation design of the sliding plate and the scale bar facilitates the precise adjustment of the moving distance of the sliding plate and the centering rod, thereby ensuring that the center of the device is aligned with the center of the pipeline body and the flange with high precision, further improving the reliability and applicability of gas leakage detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main stereoscopic structure of the present invention after it is unfolded.

[0019] Figure 2 It is a rear-view stereoscopic structural schematic diagram of the present invention after it is unfolded.

[0020] Figure 3 It is a schematic diagram of the disassembled three-dimensional structure of some parts of the driving mechanism and the centering mechanism of the present invention.

[0021] Figure 4 It is a schematic diagram of the disassembled three-dimensional structure of some parts of the centering mechanism of the present invention.

[0022] Figure 5 It is a schematic diagram of the main three-dimensional structure of the present invention after folding.

[0023] Figure 6 It is a schematic diagram of the folded cross-sectional three-dimensional structure of the present invention.

[0024] Figure 7 It is a schematic diagram of the cross-sectional three-dimensional structure of the lower plate, upper plate and centering rod of the present invention.

[0025] Figure 8It is a schematic diagram of the cross-sectional three-dimensional structure of the driving mechanism of the present invention.

[0026] Fig. 9 It is a cross-sectional three-dimensional structural schematic diagram of the lower plate, upper plate and detection mechanism of the present invention.

[0027] Fig.10 It is a three-dimensional structural schematic diagram of the driving mechanism and the detection mechanism of the present invention.

[0028] Fig.11 It is a cross-sectional three-dimensional structural schematic diagram of the driving mechanism and the detection mechanism of the present invention.

[0029] Fig.12 It is a schematic diagram of the three-dimensional structure of the driving mechanism of the present invention.

[0030] Fig.13 It is a three-dimensional structural schematic diagram of the detection mechanism and the lifting mechanism of the present invention.

[0031] Fig.14 It is a three-dimensional structural schematic diagram of the lifting mechanism of the present invention.

[0032] Fig.15 It is a schematic diagram of the disassembled three-dimensional structure of some parts of the lifting mechanism of the present invention.

[0033] Fig.16 It is a schematic diagram of the disassembled three-dimensional structure of some parts of the detection mechanism and the lifting mechanism of the present invention.

[0034] The meaning of the reference numerals in the figure: 1: pipe body, 2: flange, 3: lower plate, 31: female buckle, 4: upper plate, 41: male buckle, 5: hinge, 611: upper guide block, 612: upper arc slide, 621: lower guide block, 622: lower arc slide, 63: arc rack, 64: dual-axis motor, 65: gear, 66: shield, 71: centering rod, 72: roller, 73: sliding plate, 74: arc groove , 75: threaded frame, 76: fastening bolt, 91: outer square rod, 92: outer spring, 93: inner square rod, 94: inner spring, 95: gas sensor, 96: sleeve, 97: clamping rod, 98: clamping spring, 99: ball, 910: arc limit frame, 911: groove, 912: arc top plate, 81: movable magnet, 82: fixed magnet, 10: fixed frame, 11: roller, 12: scale bar. DETAILED DESCRIPTION

[0035] Reference to an embodiment herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] Embodiment 1: A gas leakage metering device for use between pipelines, such as Figure 1-Figure 10 As shown, it includes a lower plate 3, one side of the lower plate 3 is installed with two female buckles 31 by bolts, and one side of the upper plate 4 is installed with two male buckles 41 by bolts, the two female buckles 31 and the two male buckles 41 can be buckled with each other, and two hinges 5 are connected between the other sides of the lower plate 3 and the upper plate 4. The lower plate 3 and the upper plate 4 are provided with a driving mechanism and a centering mechanism, the centering mechanism is used to center the pipeline body 1, and the driving mechanism is provided with a detection mechanism, which is used to detect gas leakage between the flanges 2.

[0037] The driving mechanism includes an upper guide block 611, an upper guide block 611 is installed on the top of the upper plate 4, an upper arc-shaped slide bar 612 is slidably provided on the upper guide block 611, and the upper arc-shaped slide bar 612 will slide along the upper guide block 611, a lower guide block 621 is installed on the bottom of the lower plate 3, a lower arc-shaped slide bar 622 is slidably provided on the lower guide block 621, and the lower arc-shaped slide bar 622 will slide along the lower guide block 621, and an arc-shaped rack 63 is installed on both sides of the upper arc-shaped slide bar 612, respectively, a dual-axis motor 64 is installed on the top of the upper plate 4, and a gear 65 is installed on the two output shafts of the dual-axis motor 64, respectively, and the two gears 65 are meshed with the two arc-shaped racks 63, a shield 66 is installed on the top of the upper plate 4, and the dual-axis motor 64 and the two gears 65 are both located in the shield 66.

[0038] The centering mechanism includes a centering rod 71. Four centering rods 71 ​​for positioning are slidably provided on the lower plate 3 and the upper plate 4 respectively. A roller 72 is rotatably provided on one side of the eight centering rods 71 ​​away from each other through a bearing. Two sliding plates 73 are slidably provided on the lower plate 3 and the upper plate 4 respectively. There are four sliding plates 73 in total. Each sliding plate 73 has two arc grooves 74. The eight rollers 72 are respectively located in the eight arc grooves 74. A threaded frame 75 is installed between the two sliding plates 73 on the lower plate 3. A threaded frame 75 is also installed between the two sliding plates 73 on the upper plate 4. A fastening bolt 76 is threadedly connected to the two threaded frames 75. One side of the two fastening bolts 76 contacts one side of the lower plate 3 and the upper plate 4 respectively.

[0039] The detection mechanism includes an outer rod 91, and an outer rod 91 is slidably provided on the side where the upper arc slide bar 612 and the lower arc slide bar 622 are close to each other. The two outer rods 91 will slide along the upper arc slide bar 612 and the lower arc slide bar 622 respectively. An outer spring 92 is connected between the upper arc slide bar 612 and the lower arc slide bar 622 on the side where the two outer rods 91 are away from each other. An inner rod 93 is slidably provided on the side where the two outer rods 91 are close to each other. An inner spring 94 is connected between the two outer rods 91 on the side where the two inner rods 93 are away from each other. A gas sensor 95 for detecting gas leakage is installed on the side where the two inner rods 93 are close to each other. The side where the two gas sensors 95 are close to each other is in contact with the gap between the two flanges 2.

[0040] When measuring and detecting gas leakage between pipelines, the operator first puts the lower plate 3 and the upper plate 4 on the pipeline body 1 and the flange 2, then closes the lower plate 3 and the upper plate 4, and fastens the male buckle 41 through the female buckle 31, so that the lower plate 3 and the upper plate 4 are buckled on the pipeline body 1, and the two ends of the upper arc-shaped slide bar 612 and the lower arc-shaped slide bar 622 are aligned respectively, and the two gas sensors 95 are respectively in contact with the joints between the flanges 2. Under the action of the inner spring 94, the inner square rod 93 will slide in the outer square rod 91, and the inner square rod 93 drives the gas sensor 95 to move, so that the gas sensor 95 can adapt to flanges 2 of different diameters, thereby improving applicability; then the operator pushes the two fastening bolts 76 toward each other. The two fastening bolts 76 drive the four sliding plates 73 to move in the direction of approaching each other. Under the action of the eight arc grooves 74, the eight rollers 72 and the eight centering rods 71 ​​will move in the direction of approaching each other. After the eight centering rods 71 ​​contact the pipeline body 1, by adjusting the positions of the eight centering rods 71, the center of the circle of the device can be kept consistent with the center of the circle of the pipeline body 1 and the flange 2, so that the gas sensor 95 will not be displaced when moving along the flange 2, avoiding the movement of the gas sensor 95, and improving the detection accuracy. Then the operator rotates the two fastening bolts 76, and the sides of the two fastening bolts 76 that are close to each other are tightly fitted with the outer sides of the lower plate 3 and the upper plate 4 respectively. Thereby, the positions of the four sliding plates 73 can be fixed, and then the positions of the eight centering rods 71 ​​can be fixed through the eight arc grooves 74; then the operator starts the two output shafts of the dual-axis motor 64 to rotate forward and reversely, and the two output shafts of the dual-axis motor 64 drive the two gears 65 to rotate forward and reversely. Under the action of the protective cover 66, foreign objects can be prevented from getting stuck in the two output shafts and the two gears 65 of the dual-axis motor 64. The two gears 65 rotate forward and reversely to drive the two arc racks 63 and the upper arc slide 612 to move back and forth, and the upper guide block 611 guides the upper arc slide 612, and the upper arc slide 612 drives the lower arc slide 622 to move back and forth, and the lower guide block 621 guides the lower arc slide 622 When the upper arc-shaped slide bar 612 and the lower arc-shaped slide bar 622 move back and forth, they drive the two outer square rods 91, the two outer springs 92, the two inner square rods 93, the two inner springs 94 and the two gas sensors 95 to move back and forth. The two gas sensors 95 move along the joints of the two flanges 2 and detect whether there is gas leakage from the joints of the two flanges 2; after the detection is completed, the two output shafts of the dual-axis motor 64 stop rotating, the two gears 65 drive the two arc-shaped racks 63 to reset, and the two arc-shaped teeth drive the upper arc-shaped slide bar 612 and the lower arc-shaped slide bar 622 to reset, and then the operator unfastens the female buckle 31 and the male buckle 41, and then takes the device out of the pipeline body 1 and the flange 2;When performing gas leakage detection on the pipeline body 1 of the same specification, the operator does not need to adjust the position of the centering rod 71. When performing gas leakage detection on the pipeline body 1 of other specifications, the operator rotates the two fastening bolts 76 in the opposite direction. After the two fastening bolts 76 are separated from the outer side surfaces of the lower plate 3 and the upper plate 4 respectively, the operator adjusts the position of the four sliding plates 73, and then can adjust the position of the eight centering rods 71 ​​through the eight arc grooves 74, so as to adapt to the pipeline body 1 of other specifications. ;

[0041] Embodiment 2: Based on embodiment 1, Figure 8-Figure 16 As shown, it also includes a lifting mechanism arranged on the lower plate 3, the upper plate 4 and the detection mechanism, the lifting mechanism is used to lift the gas sensor 95, the lifting mechanism includes a sleeve 96, two opposite sides of the two outer rods 91 are respectively installed with a sleeve 96, the sleeve 96 is connected to the outer rod 91, and a clamping rod 97 for fixing the inner rod 93 is slidably provided in the two sleeves 96. The two clamping rods 97 are symmetrically arranged, and a clamping spring 98 is respectively connected between the two clamping rods 97 and the two sleeves 96. A ball 99 is provided at one end of the two clamping rods 97 away from each other, and the lower plate 3 and the upper plate 4 are respectively installed on both sides. An arc limit frame 910 is installed, and there are four arc limit frames 910 in total. Each arc limit frame 910 has a guide groove, and a groove 911 is set in the middle of the guide groove on the arc limit frame 910. The four sleeves 96 are respectively located in the grooves 911 in the middle of the guide grooves on the four arc limit frames 910. An arc top plate 912 is installed on the side of the two arc limit frames 910 on the lower plate 3 that are away from each other, and an inclined surface and a straight surface are set on the side of the two arc top plates 912 that are close to each other. The two arc top plates 912 are symmetrically arranged, and each ball 99 contacts the inclined surface on the arc top plate 912 respectively.

[0042] The elastic constant of the outer spring 92 is greater than the elastic constant of the inner spring 94 .

[0043] Initially, the four sleeves 96 are respectively located in the grooves 911 in the middle of the guide grooves on the four arc-shaped limit frames 910. The four sleeves 96 and the grooves 911 in the middle of the guide grooves on the four arc-shaped limit frames 910 can limit the lower arc-shaped slide 622 to prevent the lower arc-shaped slide 622 from shaking. Each ball 99 is in contact with the inclined surface on the arc-shaped top plate 912. When the upper arc-shaped slide 612 and the lower arc-shaped slide 622 move back and forth, the four sleeves 96 are driven to move out of the grooves 911 in the middle of the guide grooves on the four arc-shaped limit frames 910 and into the guide grooves on the four arc-shaped limit frames 910. The two sleeves 96 on the upper arc-shaped slide 612 drive the outer rod 91 and the inner rod 92 to move. 3. The inner spring 94, the gas sensor 95, the clamping rod 97, the clamping spring 98 and the ball 99 move toward the direction close to the upper guide block 611. When the two sleeves 96 on the upper arc-shaped slide bar 612 are not completely removed from the groove 911 in the middle of the guide grooves on the two arc-shaped limit frames 910, the two balls 99 move from the inclined surface on the arc-shaped top plate 912 to the straight surface on the arc-shaped top plate 912. The two balls 99 drive the two clamping rods 97 to move toward each other, and the two clamping springs 98 are stretched accordingly. After the two clamping rods 97 are in close contact with both sides of the inner square rod 93, the two clamping rods 97 can fix the inner square rod 93, thereby restricting the inner spring 94, so that the inner square rod 93 is The rod 93 will not slide on the outer rod 91, thereby limiting the position of the gas sensor 95; when the two sleeves 96 on the upper arc-shaped slide bar 612 are completely moved out of the groove 911 in the middle of the guide grooves on the two arc-shaped limit frames 910, under the action of the guide grooves on the two arc-shaped limit frames 910, the two sleeves 96, the outer rod 91, the inner rod 93, the inner spring 94, the gas sensor 95, the clamping rod 97, the clamping spring 98 and the ball 99 can be driven to move toward the upper guide block 611; the two sleeves 96 on the lower arc-shaped slide bar 622 drive the outer rod 91, the inner rod 93, the inner spring 94, the gas sensor 95, the clamping rod 97, the clamping spring 98 and the ball 99 to move toward the upper guide block 611. 9 moves in the direction close to the lower guide block 621. When the two sleeves 96 on the lower arc-shaped slide bar 622 have not completely moved out of the groove 911 in the middle of the guide groove on the two arc-shaped limit frames 910, the two balls 99 move from the inclined surface on the arc-shaped top plate 912 to the straight surface on the arc-shaped top plate 912. The two balls 99 drive the two clamping rods 97 to move in the direction close to each other, and the two clamping springs 98 are stretched accordingly. After the two clamping rods 97 are in close contact with both sides of the inner square rod 93, the two clamping rods 97 can fix the inner square rod 93, thereby limiting the inner spring 94, so that the inner square rod 93 will not slide on the outer square rod 91, thereby limiting the position of the gas sensor 95.When the two sleeves 96 on the lower arc-shaped slide bar 622 are completely moved out of the groove 911 in the middle of the guide grooves on the two arc-shaped limit frames 910, the two sleeves 96, the outer rod 91, the inner rod 93, the inner spring 94, the gas sensor 95, the clamping rod 97, the clamping spring 98 and the ball 99 can be driven to move in the direction close to the lower guide block 621 under the action of the guide grooves on the two arc-shaped limit frames 910; in this way, the two gas sensors 95 can be moved away from each other, so that the two gas sensors 95 can move a certain distance on the flange 2, so that when the gas sensor 95 moves along the flange 2, the gas sensor 95 will not rub against the flange 2 for a long time, reducing the wear of the gas sensor 95, and also preventing the friction between the gas sensor 95 and the flange 2 from interfering with the accuracy of gas detection. ;

[0044] Embodiment 3: Based on embodiment 2, Figure 8-Figure 16 As shown, it also includes a positioning mechanism arranged on the lower guide block 621 and the lower arc-shaped slide bar 622, the positioning mechanism is used to position the lower guide block 621 and the lower arc-shaped slide bar 622, a movable magnet 81 is installed in the middle of the lower arc-shaped slide bar 622, and a fixed magnet 82 is installed on one side of the lower guide block 621 close to the lower arc-shaped slide bar 622.

[0045] The movable magnet 81 and the fixed magnet 82 have opposite magnetic properties at the sides where they are close to each other, so that the movable magnet 81 and the fixed magnet 82 are attracted to each other.

[0046] It also includes a fixing frame 10 , and each of the two gas sensors 95 is equipped with a fixing frame 10 . Two rollers 11 are rotatably provided on one side of the two fixing frames 10 close to each other through bearings, and the rollers 11 are in contact with the flange 2 .

[0047] It also includes scale bars 12 . Two scale bars 12 are respectively installed on the outer side surfaces of the lower plate 3 and the upper plate 4 . The four scale bars 12 are respectively aligned with one side of the four sliding plates 73 .

[0048] When the lower arc slide 622 moves back and forth along the lower guide block 621, the lower arc slide 622 drives the movable magnet 81 to move back and forth, and the movable magnet 81 will be separated from the fixed magnet 82 on the lower guide block 621. When the lower arc slide 622 drives the movable magnet 81 to reset, the movable magnet 81 will be re-adsorbed with the fixed magnet 82, and then the lower arc slide 622 can be limited, thereby further limiting and positioning the gas sensor 95 on the lower arc slide 622, and further preventing the lower arc slide 622 and the gas sensor 95 from shaking.

[0049] When the gas sensor 95 moves toward the flange 2 , the gas sensor 95 drives the fixing frame 10 and the roller 11 to move toward the flange 2 , thereby preventing the gas sensor 95 from directly contacting the flange 2 , thereby preventing the gas sensor 95 from being damaged.

[0050] By observing the position of the sliding plate 73 and the scale bar 12, the sliding distance of the four sliding plates 73 can be adjusted more accurately, and then the moving distance of the eight centering rods 71 ​​can be accurately controlled, thereby improving the accuracy of alignment of the center of the device with the center of the pipe body 1 and the flange 2.

[0051] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, all equivalent changes made to the contents described in the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A gas leakage metering device for use between pipelines, characterized in that: The invention comprises a lower plate (3), wherein two female buckles (31) are installed on one side of the lower plate (3), and two male buckles (41) are installed on one side of the upper plate (4), wherein the two female buckles (31) and the two male buckles (41) can be buckled with each other, and two hinges (5) are connected between the other sides of the lower plate (3) and the upper plate (4), and a driving mechanism and a centering mechanism are provided on the lower plate (3) and the upper plate (4), wherein the centering mechanism is used to center the pipeline body (1), and a detection mechanism is provided on the driving mechanism, wherein the detection mechanism is used to detect gas leakage between the flange plates (2); the driving mechanism comprises an upper guide block (611), wherein an upper guide block (611) is installed on the top of the upper plate (4), and an upper arc-shaped sliding strip (612) is slidably provided on the upper guide block (611), and a lower guide block (621) is installed on the bottom of the lower plate (3), and a lower arc-shaped sliding strip (622) is slidably provided on the lower guide block (621); The centering mechanism comprises a centering rod (71), four centering rods (71) are slidably provided on the lower plate (3) and the upper plate (4), a roller (72) is rotatably provided on the side of the eight centering rods (71) away from each other, two sliding plates (73) are slidably provided on the lower plate (3) and the upper plate (4), and there are four sliding plates (73) in total, each sliding plate (73) has two arc grooves (74), and the eight rollers (72) are respectively located in the eight arc grooves (74), a threaded frame (75) is installed between the two sliding plates (73) on the lower plate (3), and a threaded frame (75) is also installed between the two sliding plates (73) on the upper plate (4), and the two threaded frames (75) are connected to a fastening bolt (76) by threading, and one side of the two fastening bolts (76) is in contact with one side of the lower plate (3) and the upper plate (4) respectively; The detection mechanism comprises an outer square rod (91), an outer square rod (91) is slidably provided on the sides of the upper arc-shaped slide bar (612) and the lower arc-shaped slide bar (622) that are close to each other, an outer spring (92) is connected between the upper arc-shaped slide bar (612) and the lower arc-shaped slide bar (622) on the sides of the two outer square rods (91) that are away from each other, an inner square rod (93) is slidably provided on the sides of the two outer square rods (91), an inner spring (94) is connected between the two outer square rods (91) on the sides of the two inner square rods (93) that are away from each other, and a gas sensor (95) is installed on the sides of the two inner square rods (93) that are close to each other, and the sides of the two gas sensors (95) that are close to each other are in contact with the gaps of the two flanges (2).

2. A gas leakage metering device for use between pipelines as claimed in claim 1, characterized in that: An arc-shaped rack (63) is respectively installed on both sides of the upper arc-shaped slide bar (612); a dual-axis motor (64) is installed on the outer top of the upper plate (4); a gear (65) is respectively installed on the two output shafts of the dual-axis motor (64); the two gears (65) are meshed with the two arc-shaped racks (63); a shield (66) is installed on the outer top of the upper plate (4); the dual-axis motor (64) and the two gears (65) are both located inside the shield (66).

3. A gas leakage metering device for use between pipelines as claimed in claim 2, characterized in that: The invention also includes a lifting mechanism arranged on the lower plate (3), the upper plate (4) and the detection mechanism, the lifting mechanism being used to lift the gas sensor (95), the lifting mechanism including a sleeve (96), two sleeves (96) being respectively installed on two opposite sides of the two outer rods (91), a clamping rod (97) being slidably arranged in the two sleeves (96), the two clamping rods (97) being symmetrically arranged, a clamping spring (98) being respectively connected between the two clamping rods (97) and the two sleeves (96), a ball (99) being respectively installed at one end of the two clamping rods (97) away from each other, and an arc-shaped limit frame (91) being respectively installed on the two sides of the lower plate (3) and the upper plate (4). 0), there are four arc-shaped limit frames (910), each arc-shaped limit frame (910) has a guide groove, a groove (911) is arranged in the middle of the guide groove on the arc-shaped limit frame (910), four sleeves (96) are respectively located in the grooves (911) in the middle of the guide grooves on the four arc-shaped limit frames (910), two arc-shaped limit frames (910) on the lower plate (3) are installed with an arc-shaped top plate (912) on the side away from each other, and the two arc-shaped top plates (912) are arranged with an inclined surface and a straight surface on the side close to each other, the two arc-shaped top plates (912) are symmetrically arranged, and each ball (99) is in contact with the inclined surface on the arc-shaped top plate (912).

4. A gas leakage metering device for use between pipelines as claimed in claim 3, characterized in that: The elastic constant of the outer spring (92) is greater than the elastic constant of the inner spring (94).

5. A gas leakage metering device for use between pipelines as claimed in claim 3, characterized in that: It also includes a positioning mechanism arranged on the lower guide block (621) and the lower arc-shaped slide bar (622), the positioning mechanism is used to position the lower guide block (621) and the lower arc-shaped slide bar (622), a movable magnet (81) is installed in the middle of the lower arc-shaped slide bar (622), and a fixed magnet (82) is installed on one side of the lower guide block (621) close to the lower arc-shaped slide bar (622).

6. A gas leakage metering device for use between pipelines as claimed in claim 5, characterized in that: The sides of the movable magnet (81) and the fixed magnet (82) that are close to each other have opposite magnetic properties, and the movable magnet (81) and the fixed magnet (82) are attracted to each other.

7. A gas leakage metering device for use between pipelines as claimed in claim 6, characterized in that: It also includes a fixing frame (10), each of the two gas sensors (95) being mounted with a fixing frame (10), and two rollers (11) are rotatably provided on one side of the two fixing frames (10) close to each other, and the rollers (11) are in contact with the flange (2).

8. A gas leakage metering device for use between pipelines as claimed in claim 7, characterized in that: It also includes scale bars (12), and two scale bars (12) are respectively installed on the outer side surfaces of the lower plate (3) and the upper plate (4), and the four scale bars (12) are respectively aligned with one side of the four sliding plates (73).

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