Pipeline gas tightness detection device and method

Abstract

The application relates to the technical field of detection devices, and discloses a pipeline air tightness detection device and method. The pipeline air tightness detection device comprises a first pipe arranged in the inside of a pipe body, a second pipe fixedly arranged at one end of the first pipe, and the inside of the first pipe and the second pipe is in communication. The shell is thrown outwards by centrifugal force, so that the sponge block approaches the inner wall of the second pipe. When there is a leakage hole on the wall of the second pipe, the high-pressure gas will run out of the leakage hole, so as to drive the fluorescent liquid in the sponge block to flow out of the leakage hole and onto the outer wall of the second pipe. Then, the outer wall of the second pipe is irradiated by fluorescence, so that the position of the leakage hole is found. The first pipe is inserted into the inside of the pipe body, and then the rotation of the brush disc drives the brush pieces to clean the inner wall of the pipe body, so that the device can accurately detect the leakage points on the pipe body, and the accuracy of the pipeline air tightness detection is improved.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, and more particularly to a pipeline airtightness testing device and method. Background Technology

[0002] In industrial production, lubrication is crucial for high-speed, precision machinery. Oil-air distributors provide precise, controllable, stable, and quantitative lubrication to lubrication points. They mix lubricating oil and compressed air to form an oil film, which is then delivered to the lubrication points along the inner wall of the high-pressure pipe via the flow of compressed air. High-pressure pipes must be kept sealed during use to prevent leakage of the medium inside. Leakage can lead to lubrication failure and even safety accidents. Therefore, airtightness testing is performed on high-pressure pipes.

[0003] Existing airtightness testing devices work by inserting the test head between the inner walls of a high-pressure pipe and then testing it with high-pressure gas. However, after prolonged use, dirt accumulates on the inner wall of the high-pressure pipe. During testing, this dirt can easily block the location of leaks in the pipe wall, making it impossible to detect leaks in a timely manner and affecting the accuracy of pipeline airtightness testing. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a pipeline airtightness testing device and method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] Pipeline airtightness testing device and method, used for airtightness testing of pipe bodies, including:

[0007] The first tube is located inside the tube body;

[0008] The second tube is fixedly installed at one end of the first tube, and the interiors of the first tube and the second tube are connected.

[0009] The brush disc is located at the end of the second tube furthest from the first tube and is able to rotate about the central axis of the second tube.

[0010] Two rubber rings are disposed on the outer circumference of the second tube. The two rubber rings are configured such that when the brush disc rotates, the outer surfaces of the two rubber rings can abut against the inner wall of the tube.

[0011] As a further embodiment of the present invention, a protrusion is fixedly installed on the end face of the second tube relative to one end of the first tube, the brush disk is rotatably installed on the outer circumferential surface of the protrusion, a bracket is fixedly installed on the inner wall of the second tube, an impeller is rotatably installed on the outer surface of the bracket near the first tube, and a first gear is fixedly installed on one end of the impeller through the outer surface of the bracket.

[0012] As a further embodiment of the present invention, a second gear is rotatably mounted on the bracket near the outer surface of the first gear, the first gear meshing with the second gear, and a first internal gear is fixedly mounted on the inner wall of the brush disc, the first internal gear meshing with the second gear.

[0013] As a further embodiment of the present invention, two rings are fixedly installed on the outer circumference of the second tube, and annular grooves are formed on the outer circumference of the two rings, with the two rubber rings respectively disposed inside the annular grooves.

[0014] As a further embodiment of the present invention, a second internal gear is rotatably mounted on the inner wall of the annular groove, and a plurality of guide grooves are equidistantly formed on the outer surface of the second internal gear. A slider is slidably mounted on the inner wall of the guide groove, and two support plates are symmetrically fixedly mounted on both ends of the slider. A guide wheel is rotatably mounted between the two support plates. The guide wheel abuts against the outer surface of the inner ring of the rubber ring. A second spring is fixedly connected to one end of the slider, and the other end of the second spring abuts against the inner wall of the guide groove. The guide groove and the diameter of the second internal gear are provided with an angle.

[0015] As a further embodiment of the present invention, a plurality of columnar gears are rotatably mounted between the two ring bodies, and the plurality of columnar gears mesh with the second internal gear. A fourth gear is fixedly mounted on one end of each columnar gear through the outer surface of the ring body, and a third gear is fixedly mounted on the outer surface of the brush disk near the fourth gear, and the third gear meshes with the fourth gear.

[0016] As a further embodiment of the present invention, multiple insertion holes are equidistantly provided on the end faces of the two ring bodies on opposite sides. A stop post is slidably inserted into the inner wall of each of the multiple insertion holes. One end of the stop post abuts against the bottom end of the support plate. The bottom end of the support plate is provided with an arc angle. The other end of the stop post penetrates the outer surface of the ring body and is provided with a sliding groove. The sliding groove is arranged perpendicular to the central axis of the stop post. Multiple baffles are rotatably installed equidistantly on the end faces of the two ring bodies on opposite sides. A sliding post is fixedly installed on the outer surface of the baffle near the stop post. The sliding post is slidably installed with the inner wall of the sliding groove. The baffle and the end face of the ring body are provided with an inclination angle.

[0017] As a further embodiment of the present invention, a plurality of first air holes are provided at equal intervals on the outer circumferential surface of the first tube near the baffle, and a plurality of second air holes are provided on the outer circumferential surface of the protrusion. The first air holes and the second air holes are both connected to the interior of the second tube, and the first air holes and the second air holes are both located directly below the baffle.

[0018] As a further embodiment of the present invention, a cylinder is rotatably mounted between the two ring bodies. A third internal gear is fixedly mounted on the inner wall of the cylinder, and the third internal gear meshes with multiple columnar gears. Two sets of air outlets are formed on the outer circumference of the cylinder in pairs. A connecting pipe is fixedly mounted on the inner wall of the second pipe, and a through hole is formed on the outer circumference of the second pipe. A gap is provided between the cylinder and the second pipe. The air outlets are connected to the connecting pipe through the gap and the through hole. A guide tube is fixedly mounted on the outer circumference of the cylinder near the air outlets. A housing is slidably mounted on the outer surface of the guide tube. A first spring is sleeved through the housing at the top end of the guide tube. One end of the first spring is fixedly connected to the top end of the guide tube, and the other end of the first spring abuts against the inner wall of the housing. A sponge block is fixedly mounted on the housing near the inner wall of the second pipe. The guide tube is connected to the air outlets.

[0019] The testing method for pipeline airtightness testing devices includes the following steps:

[0020] S1: During testing, place the first tube, the second tube, the brush disc, and two rubber rings inside the tube body, and then use the rotation to drive the brush disc to clean the inner wall of the tube body.

[0021] S2: When the brush disc rotates, the slider drives the guide wheel to move closer to the rubber ring through the two support plates, thereby squeezing the rubber ring onto the inner wall of the tube, making the rubber ring flat against the inner wall of the tube. Since the width of the rubber ring and the groove of the ring are matched, when the rubber ring is squeezed, the rubber ring will be flattened and deformed at the same time, thus flattening against the inner wall of the ring groove.

[0022] S3: The gas is ejected through the first and second air holes. The ejected gas blows the baffle plate. Because the baffle plate and the end face of the ring are inclined, the baffle plate will be blown up by the gas and move upward. Through the cooperation of the sliding column and the sliding groove, the baffle column is driven to move closer to the slider. The support plate abuts against the baffle column, thereby driving the slider to slide to one end of the guide groove, so that the guide wheel abuts against the rubber ring.

[0023] S4: When the cylinder rotates, the centrifugal force throws the shell outward, causing the sponge block to approach the inner wall of the second tube. When there is a leak hole on the wall of the second tube, the high-pressure gas will escape from the leak hole, which will cause the fluorescent liquid inside the sponge block to flow out from the leak hole to the outer wall of the second tube. Then, by irradiating the outer wall of the second tube with fluorescence, the location of the leak hole can be found.

[0024] When the cylinder rotates, the centrifugal force throws the shell outward, bringing the sponge block close to the inner wall of the second tube. When there is a leak in the wall of the second tube, high-pressure gas will escape from the leak, causing the fluorescent liquid inside the sponge block to flow out from the leak to the outer wall of the second tube. Then, by irradiating the outer wall of the second tube with fluorescence, the location of the leak can be found. By inserting the first tube into the tube body, and then using the rotation of the brush disk to drive the brush blades to clean the inner wall of the tube body, the device can accurately detect the leak point on the tube body, improving the accuracy of tube airtightness detection. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the pipeline airtightness testing device proposed in this invention.

[0026] Figure 2 This is a cross-sectional schematic diagram of the pipe body of the pipeline airtightness testing device proposed in this invention;

[0027] Figure 3 This is a schematic diagram of the first pipe of the pipeline airtightness testing device proposed in this invention.

[0028] Figure 4 This is a schematic diagram of the brush disc of the pipeline airtightness testing device proposed in this invention;

[0029] Figure 5 This is a cross-sectional schematic diagram of the pipeline airtightness testing device proposed in this invention;

[0030] Figure 6 This is a schematic diagram of the second pipe of the pipeline airtightness testing device proposed in this invention;

[0031] Figure 7 This is a schematic diagram of the cylinder of the pipeline airtightness testing device proposed in this invention;

[0032] Figure 8 This is a schematic diagram of the annular structure of the pipeline airtightness testing device proposed in this invention;

[0033] Figure 9 This is a schematic diagram of the first internal gear of the pipeline airtightness testing device proposed in this invention.

[0034] Figure 10 This is a schematic diagram of the housing of the pipeline airtightness testing device proposed in this invention;

[0035] Figure 11 This is a schematic diagram of the second internal gear of the pipeline airtightness testing device proposed in this invention;

[0036] Figure 12 This is a schematic diagram of the guide wheel of the pipeline airtightness testing device proposed in this invention;

[0037] Figure 13 for Figure 3 Enlarged view of a portion of point A in the middle;

[0038] Figure 14 for Figure 8 Enlarged view of a portion of point B in the middle;

[0039] Figure 15 for Figure 11 A magnified view of a portion of point C in the middle.

[0040] In the picture:

[0041] 100, tube body; 200, first tube; 210, first vent;

[0042] 300, Second tube; 310, Through hole; 320, Support; 330, Protrusion; 331, Second vent; 400, Brush plate;

[0043] 500, Ring body; 510, Ring groove; 600, Rubber ring; 700, Cylinder body; 710, Air outlet; 720, Third internal gear;

[0044] 800, conduit; 900, casing; 1000, first spring; 1100, sponge block; 1200, connecting pipe; 1300, impeller; 1400, first gear;

[0045] 1500, Second gear; 1600, First internal gear; 1700, Third gear; 1800, Fourth gear; 1900, Spur gear;

[0046] 2000, Second internal gear; 2010, Guide groove; 2100, Slider; 2110, Support plate; 2120, Second spring; 2200, Guide wheel;

[0047] 3000, baffle plate; 3010, sliding column; 3100, stop column; 3110, sliding groove. Detailed Implementation

[0048] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0049] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0050] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] In order to accurately locate leaks in high-pressure pipes during inspection, such as... Figure 1 and Figure 2 As shown, this invention proposes a pipe airtightness testing device for testing the airtightness of a pipe body 100. The pipe airtightness testing device includes: a first pipe 200, a second pipe 300, a brush disc 400, and two rubber rings 600. Specifically, as shown... Figure 2 As shown, the first tube 200 is located inside the tube body 100. In use, the operator connects the air inlet of the first tube 200 to an external high-pressure air pump via a connecting pipe, and then extends the first tube 200 into the tube body 100 via the connecting pipe for subsequent testing. Because... Figure 3 As shown, the second tube 300 is fixedly installed at one end of the first tube 200, so the interiors of the first tube 200 and the second tube 300 are connected. The brush disk 400 is installed at the end of the second tube 300 away from the first tube 200 and can rotate around the central axis of the second tube 300. When the brush disk 400 rotates, it unfolds the outer brush blades through centrifugal force. The unfolded brush blades are flat against the inner wall of the tube body 100. Then, the rotation drives the brush blades to clean the inner wall of the tube body 100. This arrangement allows the device to clean the inner wall of the tube body 100 before testing its airtightness, so that the device can accurately detect the leakage points on the tube body 100 and improve the accuracy of the airtightness test of the tube body 100.

[0052] In order to conduct segmented airtightness testing on the inner wall of pipe 100 and pinpoint the exact location of leaks, the pipe 100 needs to be divided into multiple segments for testing during the device inspection. Each segment then needs to be sealed. Details are as follows... Figure 2 As shown, two rubber rings 600 are disposed on the outer circumference of the second tube 300. When the second tube 300 is inserted into the tube body 100, the outer surfaces of the two rubber rings 600 will abut against the inner wall of the tube body 100, thereby making a section of the tube body 100 between the two rubber rings 600 in a sealed state, which facilitates subsequent sealing performance testing. Because the second tube 300 needs to move forward segment by segment inside the tube body 100, and if the rubber ring 600 is always in contact with the inner wall of the tube body 100, the frictional force makes it difficult for the second tube 300 to move within the tube body 100. Therefore, the rubber ring 600 needs to be in contact with the inner wall of the tube body 100 when the device is checking the sealing performance of the tube body 100, and not in contact with the inner wall of the tube body 100 when the sealing performance of the tube body 100 is not being checked. To solve this problem, the two rubber rings 600 are configured such that when the brush disk 400 rotates, the outer surfaces of the two rubber rings 600 can abut against the inner wall of the tube body 100, and conversely, when the brush disk 400 does not rotate, the outer surfaces of the two rubber rings 600 do not abut against the inner wall of the tube body 100 (the detailed principle is described below).

[0053] In order for the brush disc 400 to rotate, such as Figure 6 As shown, a protrusion 330 is fixedly installed on the end face of the second tube 300 relative to one end of the first tube 200. The brush disk 400 is rotatably mounted on the outer circumferential surface of the protrusion 330. The protrusion 330 restricts the installation position of the brush disk 400. It should be noted that the rotation center of the brush disk 400 coincides with the central axis of the first tube 200 and the second tube 300. Figure 4 and Figure 5 As shown, a bracket 320 is fixedly installed on the inner wall of the second tube 300. An impeller 1300 is rotatably mounted on the outer surface of the bracket 320 near the first tube 200. A first gear 1400 is fixedly mounted on one end of the impeller 1300, penetrating the outer surface of the bracket 320. A second gear 1500 is rotatably mounted on the outer surface of the bracket 320 near the first gear 1400. The first gear 1400 and the second gear 1500 mesh with each other. Figure 9As shown, a first internal gear 1600 is fixedly installed on the inner wall of the brush disc 400. The first internal gear 1600 meshes with the second gear 1500. When the external high-pressure air pump opens the solenoid valve, high-pressure gas enters the second pipe 300 through the connecting pipe and the first pipe 200, and then exits from the outlet of the second pipe 300. The high-pressure gas drives the impeller 1300 to rotate, which in turn drives the first gear 1400 to rotate. The first gear 1400 drives the second gear 1500 to rotate, and the second gear 1500 drives the brush disc 400 to rotate through the first internal gear 1600. The rotation of the brush disc 400 cleans the inner wall of the pipe body 100. It should be noted that the brush disc 400 is installed at the outlet of the second pipe 300 so that the dirt brushed off can be directly carried away by the high-pressure gas, preventing it from falling onto the inner wall of the pipe body 100, the first gear 1400, the second gear 1500, and the outer surface of the first internal gear 1600.

[0054] In order for the two rubber rings 600 to be installed on the outer circumference of the second tube 300, such as Figure 6 As shown, two rings 500 are fixedly installed on the outer circumference of the second tube 300. Each ring 500 has an annular groove 510 on its outer circumference. Two rubber rings 600 are respectively disposed inside the annular groove 510. The width of the annular groove 510 matches the diameter of the rubber ring 600. To support the position of the two rubber rings 600, as shown... Figure 7 As shown, a second internal gear 2000 is rotatably mounted on the inner wall of the annular groove 510. Multiple guide grooves 2010 are equidistantly opened on the outer surface of the second internal gear 2000. A slider 2100 is slidably mounted on the inner wall of the guide groove 2010. Two support plates 2110 are symmetrically fixed at both ends of the slider 2100. A guide wheel 2200 is rotatably mounted between the two support plates 2110. The guide wheel 2200 abuts against the outer surface of the inner ring of the rubber ring 600. The inner ring of the rubber ring 600 is supported by the arrangement of multiple guide wheels 2200, so that the rubber ring 600 is restricted to a fixed position in the annular groove 510.

[0055] In order for the two rubber rings 600 to seal the tube body 100 in adjacent sections when the brush disc 400 rotates, such as Figure 11 , Figure 12 As shown and Figure 15As shown, a second spring 2120 is fixedly connected to one end of the slider 2100, and the other end of the second spring 2120 abuts against the inner wall of the guide groove 2010. The guide groove 2010 and the diameter of the second internal gear 2000 are at an angle. When the second internal gear 2000 is driven to rotate, it will drive the guide wheel 2200 to rotate along the inner wall of the rubber ring 600. Because the guide wheel 2200 and the inner ring of the rubber ring 600 abut against each other, under the friction of the contact surface between them, the guide wheel 2200... It also rotates (it should be noted that this rotation has a certain damping, so that the guide wheel 2200 can be resisted by the rubber ring 600. In actual installation, a damping bearing can be used to connect the guide wheel 2200 and the support plate 2110 for rotation). When the guide wheel 2200 rotates around the center of the second internal gear 2000, it is subject to the resistance from the rubber ring 600, and the inclination direction of the guide groove 2010 is towards the rotation direction of the second internal gear 2000 (e.g., Figure 15 (As indicated by the arrow) At this time, the resistance will push the slider 2100 to slide along the inner wall of the guide groove 2010 and move towards the rubber ring 600. The slider 2100 drives the guide wheel 2200 to move towards the rubber ring 600 through the two support plates 2110, thereby squeezing the rubber ring 600 against the inner wall of the tube body 100, making the rubber ring 600 flat against the inner wall of the tube body 100. Since the width of the rubber ring 600 and the groove 510 are matched, when the rubber ring 600 is squeezed, the rubber ring 600 will be flattened and deformed at the same time, thus flattening against the inner wall of the groove 510. Through this setting, when the brush disk 400 rotates, the two rubber rings 600 can seal the tube body 100 in their adjacent sections, thereby forming a sealed space, which is convenient for subsequent testing. It should be noted that when the brush disk 400 is not rotating, the elastic force of the second spring 2120 causes the guide wheel 2200 to stop squeezing the rubber ring 600, making it easier for the second tube 300 to move to the next detection position.

[0056] In order to drive the second internal gear 2000 to rotate, such as Figure 8 As shown, multiple cylindrical gears 1900 are rotatably mounted between the two ring bodies 500, and all of the multiple cylindrical gears 1900 mesh with the second internal gear 2000, as shown. Figure 5 and Figure 6As shown, a fourth gear 1800 is fixedly installed at one end of the cylindrical gear 1900 through the outer surface of the ring 500. A third gear 1700 is fixedly installed on the brush disk 400 near the outer surface of the fourth gear 1800. The third gear 1700 meshes with the fourth gear 1800. The rotation of the brush disk 400 causes the third gear 1700 to rotate. The third gear 1700 drives the cylindrical gear 1900 to rotate through the fourth gear 1800. The rotation of the cylindrical gear 1900 drives the second internal gear 2000 to rotate, thereby enabling the second internal gear 2000 to drive the guide wheel 2200 to rotate.

[0057] Because the slider 2100 slides on the inner wall of the guide groove 2010, it is achieved by the resistance of the guide wheel 2200 and the rubber ring 600. In order to ensure that the slider 2100 can slide to one end of the guide groove 2010, so that the rubber ring 600 can be held in place by the guide wheel 2200, as follows: Figure 8 and Figure 14 As shown, multiple insertion holes are equidistantly opened on the end faces of the two ring bodies 500 on opposite sides. A stop post 3100 is slidably inserted into the inner wall of each insertion hole. One end of the stop post 3100 abuts against the bottom end of the support plate 2110. The bottom end of the support plate 2110 has a rounded corner. When the stop post 3100 moves towards the slider 2100, the rotation of the second internal gear 2000 will cause the support plate 2110 to abut against the stop post 3100. The bottom of 110 is provided with a rounded corner, so after the plates come into contact, the support plate 2110 is obstructed by the stop post 3100, which causes the slider 2100 to slide to one end of the guide groove 2010, so that the guide wheel 2200 abuts against the rubber ring 600. Because the resistance from the rubber ring 600 will increase after it abuts, the guide wheel 2200 will drive the slider 2100 to stop at one end of the guide groove 2010, thus ensuring that the rubber ring 600 can seal the tube body 100.

[0058] It should be noted that because the stop posts 3100 are spaced out, in actual design, the end of the stop post 3100 near the slider 2100 can be set as a strip, so that the ends of two adjacent stop posts 3100 can be connected into a ring after extending. When the strip ring extends, it will slowly contact the arc corner of the bottom end of the support plate 2110, pushing the support plate 2110 to drive the slider 2100 to one end of the guide groove 2010. At this time, the bottom end of the support plate 2110 will slide along the outer ring of the ring, thereby further ensuring that the guide wheel 2200 can abut against the rubber ring 600.

[0059] In order to allow the stop post 3100 to extend closer to the slider 2100, such as Figure 3 and Figure 13As shown, the other end of the stop post 3100 penetrates the outer surface of the ring body 500 and has a sliding groove 3110. The sliding groove 3110 is arranged perpendicular to the central axis of the stop post 3100. Multiple baffles 3000 are equidistantly rotatably mounted on the opposite end faces of the two ring bodies 500. A sliding post 3010 is fixedly mounted on the baffle 3000 near the outer surface of the stop post 3100. The sliding post 3010 is slidably mounted against the inner wall of the sliding groove 3110. The baffle 3000 and the end face of the ring body 500 are inclined at an angle. The fulcrum for the rotatable mounting of the baffle 3000 is located at the middle of its surface near the ring body 500. When the baffle 3000 tilts upwards, the cooperation of the sliding post 3010 and the sliding groove 3110 drives the stop post 3100 to move towards the slider 2100. To enable the baffle 3000 to tilt upwards, as shown... Figure 6 and Figure 13 As shown, the first tube 200 has multiple first air holes 210 evenly spaced on its outer circumferential surface near the baffle 3000, and the protrusion 330 has multiple second air holes 331 on its outer circumferential surface. Both the first air holes 210 and the second air holes 331 are connected to the interior of the second tube 300. Both the first air holes 210 and the second air holes 331 are located directly below the baffle 3000. When high-pressure gas passes through the second tube 300, some of the gas passes through the first air holes 210 and the second air holes 331. Gas ejected from hole 331 blows out a baffle plate 3000. Because the end face of the baffle plate 3000 is inclined at an angle to the end face of the ring 500, the baffle plate 3000 is blown up by the gas and moves upward. When no detection is needed and no gas is being blown out, a torsion spring is installed at the rotation mounting fulcrum of the baffle plate 3000 to allow it to retract downward. The torsion spring allows the baffle plate 3000 to return to its original position, thereby allowing the stop post 3100 to also retract and return to its original position. The baffle plate 3000 changes the direction of the ejected gas, blowing it onto the outer surfaces of the third gear 1700 and the fourth gear 1800, removing dust from their surfaces and preventing it from affecting subsequent transmission.

[0060] To test the airtightness of the second tube 300 sealed between the two rubber rings 600, such as... Figure 5 and Figure 7 As shown, a cylindrical body 700 is rotatably mounted between the two ring bodies 500. A third internal gear 720 is fixedly mounted on the inner wall of the cylindrical body 700. The third internal gear 720 meshes with multiple cylindrical gears 1900. The cylindrical gears 1900 drive the cylindrical body 700 to rotate through the third internal gear 720. Because the cylindrical body 700 is fitted over the second tube 300, there is a gap between the inner walls of the cylindrical body 700 and the second tube 300. Figure 5 and Figure 10As shown, the outer circumferential surface of the cylinder 700 has two sets of air outlets 710 arranged in pairs. The inner wall of the second pipe 300 is fixedly installed with a connecting pipe 1200. The outer circumferential surface of the second pipe 300 has a through hole 310. There is a gap between the cylinder 700 and the second pipe 300. The air outlets 710 are connected to the connecting pipe 1200 through the gap and the through hole 310. Since a conduit 800 is fixedly installed on the outer circumferential surface of the cylinder 700 near the air outlets 710, and the conduit 800 is connected to the air outlets 710, the gap between the inner walls of the cylinder 700 and the second pipe 300 is connected through the conduit 800 and the gap between the cylinder 700 and the second pipe 300. In use, the cylinder 700 is connected to the connecting pipe 1200 through an external hose, and then the hose is connected to a constant pressure high-pressure air pump, so that the gap between the cylinder 700 and the second pipe 300 is filled with high-pressure gas and is in a high-pressure environment.

[0061] In order to accurately detect the location of the leak in the second pipe 300, such as Figure 10 and Figure 6 As shown, a housing 900 is slidably mounted on the outer surface of the conduit 800. A first spring 1000 is sleeved through the housing 900 at the top end of the conduit 800. One end of the first spring 1000 is fixedly connected to the top end of the conduit 800, and the other end of the first spring 1000 abuts against the inner wall of the housing 900. A sponge block 1100 is fixedly mounted on the housing 900 near the inner wall of the second tube 300. In use, fluorescent liquid is injected into the sponge block 1100. When the cylinder 700 rotates, centrifugal force throws the housing 900 outward, causing the sponge block 1100 to approach the inner wall of the second tube 300. When there is a leakage hole in the wall of the second tube 300, high-pressure gas will escape from the leakage hole, thus driving the fluorescent liquid inside the sponge block 1100. The liquid flows out from the leak hole onto the outer wall of the second tube 300. Then, the outer wall of the second tube 300 is illuminated by a fluorescent detection lamp to locate the leak hole. When the cylinder 700 is not rotating, i.e., when the sealing of the second tube 300 is not being checked, the shell 900 and the sponge block 1100 retract into the gap between the inner walls of the cylinder 700 and the second tube 300 under the force of the first spring 1000. This prevents the sponge block 1100 from scraping against the port of the second tube 300 when the second tube 300 comes out of the tube 100, thus avoiding damage to the sponge block 1100. At the same time, when the second tube 300 moves to the next position, the sponge block 1100 will not scrape against the inner wall of the second tube 300, thus preventing the fluorescent liquid from being scraped onto the inner wall of the second tube 300 and wasting the fluorescent liquid.

[0062] The testing method for pipeline airtightness testing devices includes the following steps:

[0063] S1: During testing, the first tube 200, the second tube 300, the brush plate 400 and two rubber rings 600 are placed inside the tube body 100, and the brush plate is driven by the rotation to clean the inner wall of the tube body 100.

[0064] S2: When the brush disk 400 rotates, the slider 2100 drives the guide wheel 2200 to move closer to the rubber ring 600 through the two support plates 2110, thereby pressing the rubber ring 600 against the inner wall of the tube body 100, making the rubber ring 600 flat against the inner wall of the tube body 100. Since the width of the rubber ring 600 and the groove 510 are matched, when the rubber ring 600 is squeezed, the rubber ring 600 will be flattened and deformed at the same time, thus flattening against the inner wall of the groove 510.

[0065] S3: The gas is ejected through the first air hole 210 and the second air hole 331. The ejected gas will blow the baffle 3000. Because the baffle 3000 and the end face of the ring 500 are inclined, the baffle 3000 will be blown up by the gas and move upward. Through the cooperation of the sliding column 3010 and the sliding groove 3110, the baffle 3100 is driven to move closer to the slider 2100. The support plate 2110 abuts against the baffle 3100, thereby driving the slider 2100 to slide to one end of the guide groove 2010, so that the guide wheel 2200 abuts against the rubber ring 600.

[0066] S4: When the cylinder 700 rotates, the shell 900 is thrown outward by centrifugal force, so that the sponge block 1100 approaches the inner wall of the second tube 300. When there is a leakage hole on the wall of the second tube 300, the high-pressure gas will escape from the leakage hole, which will cause the fluorescent liquid inside the sponge block 1100 to flow out from the leakage hole to the outer wall of the second tube 300. Then, the location of the leakage hole can be found by irradiating the outer wall of the second tube 300 with fluorescence.

[0067] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A pipe airtightness testing device, used for airtightness testing of a pipe body (100), characterized in that, The pipeline airtightness testing device includes: The first tube (200) is disposed inside the tube body (100); The second tube (300) is fixedly disposed at one end of the first tube (200), and the interiors of the first tube (200) and the second tube (300) are connected. The brush disc (400) is located at the end of the second tube (300) away from the first tube (200) and is able to rotate about the central axis of the second tube (300). Two rubber rings (600) are disposed on the outer circumferential surface of the second tube (300). The two rubber rings (600) are configured such that when the brush disc (400) rotates, the outer surfaces of the two rubber rings (600) can abut against the inner wall of the tube body (100). A protrusion (330) is fixedly installed on the end face of the second tube (300) relative to one end of the first tube (200). The brush disc (400) is rotatably mounted on the outer circumferential surface of the protrusion (330). A bracket (320) is fixedly installed on the inner wall of the second tube (300). An impeller (1300) is rotatably mounted on the outer surface of the bracket (320) near the first tube (200). One end of the impeller (1300) is fixedly mounted on the outer surface of the bracket (320) through the first gear (1400). A second gear (1400) is rotatably mounted on the outer surface of the bracket (320) near the first gear (1400). Two gears (1500), the first gear (1400) meshes with the second gear (1500), the inner wall of the brush disc (400) is fixedly installed with a first internal gear (1600), the first internal gear (1600) meshes with the second gear (1500), two ring bodies (500) are fixedly installed on the outer circumference of the second tube (300), the outer circumference of the two ring bodies (500) is provided with annular grooves (510), the two rubber rings (600) are respectively set in the inside of the annular grooves (510), and the inner wall of the annular grooves (510) is rotatably installed with a second internal gear (20). 00), the outer surface of the second internal gear (2000) is provided with a plurality of guide grooves (2010) at equal intervals. A slider (2100) is slidably installed on the inner wall of the guide groove (2010). Two support plates (2110) are symmetrically fixed at both ends of the slider (2100). A guide wheel (2200) is rotatably installed between the two support plates (2110). The guide wheel (2200) abuts against the outer surface of the inner ring of the rubber ring (600). A second spring (2120) is fixedly connected to one end of the slider (2100). The other end of the second spring (2120) is against the inner wall of the guide groove (2010). The guide groove (2010) and the diameter of the second internal gear (2000) are at an angle to each other. Multiple cylindrical gears (1900) are rotatably installed between the two ring bodies (500). All of the multiple cylindrical gears (1900) mesh with the second internal gear (2000). A fourth gear (1800) is fixedly installed through the outer surface of the ring body (500) at one end of the cylindrical gear (1900). A third gear (1700) is fixedly installed near the outer surface of the fourth gear (1800) on the brush disc (400). The third gear (1700) meshes with the fourth gear (1800).

2. The pipeline airtightness testing device according to claim 1, characterized in that, The two ring bodies (500) have multiple insertion holes equidistantly spaced on their opposite end faces. Each insertion hole has a slidably inserted stop post (3100) on its inner wall. One end of the stop post (3100) abuts against the bottom end of the support plate (2110), which has a rounded corner at its bottom. The other end of the stop post (3100) penetrates the outer surface of the ring body (500) and has a sliding groove (3110). 0) The vertical stop post (3100) is set along the central axis. Multiple baffles (3000) are equidistantly mounted on the end faces of the two ring bodies (500) on opposite sides. A sliding post (3010) is fixedly mounted on the outer surface of the baffle (3000) near the stop post (3100). The sliding post (3010) is slidably mounted on the inner wall of the sliding groove (3110). The end faces of the baffle (3000) and the ring body (500) are set with an inclination angle.

3. The pipeline airtightness testing device according to claim 2, characterized in that, The first tube (200) has a plurality of first air holes (210) equidistantly opened on the outer circumferential surface near the baffle (3000), and the protrusion (330) has a plurality of second air holes (331) opened on the outer circumferential surface. The first air holes (210) and the second air holes (331) are both connected to the interior of the second tube (300), and the first air holes (210) and the second air holes (331) are both located directly below the baffle (3000).

4. The pipeline airtightness testing device according to claim 1, characterized in that, A cylinder (700) is rotatably mounted between the two rings (500). A third internal gear (720) is fixedly mounted on the inner wall of the cylinder (700). The third internal gear (720) meshes with multiple cylindrical gears (1900). Two sets of air outlets (710) are formed on the outer circumference of the cylinder (700). A connecting pipe (1200) is fixedly mounted on the inner wall of the second pipe (300). A through hole (310) is formed on the outer circumference of the second pipe (300). A gap is provided between the cylinder (700) and the second pipe (300). The air outlets (710) are connected to the connecting pipe (1200) through the gap and the through hole (310). 200) are connected. A conduit (800) is fixedly installed on the outer circumference of the cylinder (700) near the air outlet (710). A housing (900) is slidably installed on the outer surface of the conduit (800). A first spring (1000) is sleeved through the housing (900) at the top end of the conduit (800). One end of the first spring (1000) is fixedly connected to the top end of the conduit (800). The other end of the first spring (1000) abuts against the inner wall of the housing (900). A sponge block (1100) is fixedly installed on the inner wall of the housing (900) near the second tube (300). The conduit (800) is connected to the air outlet (710).

5. A testing method for a pipeline airtightness testing device, characterized in that, The pipeline airtightness testing device according to any one of claims 1-4 includes the following steps: S1: During testing, the first tube (200), the second tube (300), the brush plate (400) and two rubber rings (600) are placed inside the tube body (100), and the brush plate is driven by the rotation to clean the inner wall of the tube body (100); S2: When the brush disc (400) rotates, the slider (2100) drives the guide wheel (2200) to move closer to the rubber ring (600) through the two support plates (2110), thereby squeezing the rubber ring (600) onto the inner wall of the tube body (100), making the rubber ring (600) flat against the inner wall of the tube body (100). Since the width of the rubber ring (600) and the groove (510) are matched, when the rubber ring (600) is squeezed, the rubber ring (600) will be flattened and deformed at the same time, thus flattening against the inner wall of the groove (510). S3: The gas is ejected through the first air hole (210) and the second air hole (331). The ejected gas will blow the baffle (3000). Because the baffle (3000) and the end face of the ring (500) are inclined, the baffle (3000) will be blown up by the gas and move upward. Through the cooperation of the sliding column (3010) and the sliding groove (3110), the baffle (3100) will move closer to the slider (2100). The support plate (2110) will abut against the baffle (3100), thereby driving the slider (2100) to slide to one end of the guide groove (2010), so that the guide wheel (2200) abuts against the rubber ring (600). S4: When the cylinder (700) rotates, the shell (900) is thrown outward by centrifugal force, so that the sponge block (1100) approaches the inner wall of the second tube (300). When there is a leak hole on the wall of the second tube (300), the high-pressure gas will run out from the leak hole, which will cause the fluorescent liquid inside the sponge block (1100) to flow out from the leak hole to the outer wall of the second tube (300). Then, the location of the leak hole is found by irradiating the outer wall of the second tube (300) with fluorescence.

Images