Airtightness testing device for a cylindrical structural element

Abstract

The application relates to a kind of airtight detection devices of cylindrical structural member, comprising: frame body assembly, mass spectrometric leak detection assembly, sliding assembly, rolling assembly and guide rail piece, mass spectrometric leak detection assembly and sliding assembly are set on frame body assembly, sliding assembly is power connected with guide rail piece, for driving guide rail piece moves along the axial direction of cylindrical structural member;Rolling assembly is movably arranged on guide rail piece, and rolling assembly includes driving unit and detection gas nozzle, mass spectrometric leak detection assembly includes mass spectrometric leak detector, mass spectrometric leak detector is connected with detection gas nozzle, detection gas nozzle moves along guide rail piece under the power driving of driving unit to carry out scanning leak detection to the circumference of cylindrical structural member, sliding assembly drives detection gas nozzle to move along the axial direction of cylindrical structural member with guide rail piece to carry out scanning leak detection to the axial direction of cylindrical structural member, to realize the reduction of operation time length, and workload is reduced, to improve the detection efficiency low, and axial detection and circumferential make leak point position detection accurate, also there is no situation of missing detection.

Description

Technical Field

[0001] This application relates to the field of airtightness testing equipment, and more particularly to an airtightness testing device for a cylindrical structural component. Background Technology

[0002] Currently, using a helium mass spectrometer leak detector for airtightness testing of large cylindrical structural components offers high accuracy. This method involves filling the cylinder with helium gas, and the operator uses the detector's probe to scan the welds or screw joints on the cylinder's surface to detect leaks. However, this technique and method have several drawbacks: firstly, the process is time-consuming, labor-intensive, and inefficient; secondly, it's difficult for the operator to maintain a uniform scanning rate, posing a risk of inaccurate leak location detection. Summary of the Invention

[0003] This application provides an airtightness testing device for cylindrical structural components to solve the problems of time-consuming and labor-intensive operation, large workload, low testing efficiency, and the risk of inaccurate leak location detection.

[0004] To solve, or at least partially solve, the above-mentioned technical problems, this application provides an airtightness detection device for a cylindrical structure, comprising: a frame assembly, a mass spectrometry leak detection assembly, a sliding assembly, a rolling assembly, and a guide rail. The mass spectrometry leak detection assembly and the sliding assembly are disposed on the frame assembly. The sliding assembly is poweredly connected to the guide rail and drives the guide rail to move axially along the cylindrical structure. The rolling assembly is movably disposed on the guide rail and includes a drive unit and a detection nozzle. The mass spectrometry leak detection assembly includes a mass spectrometer leak detector, which is connected to the detection nozzle. The detection nozzle moves along the guide rail under the power drive of the drive unit to scan and detect leaks circumferentially in the cylindrical structure. The sliding assembly drives the detection nozzle to follow the guide rail and move axially along the cylindrical structure to scan and detect leaks axially in the cylindrical structure.

[0005] Optionally, the guide rail is an arc-shaped guide rail that matches the shape of the cylindrical structure. The arc-shaped guide rail is disposed on one side of the cylindrical structure so that the detection nozzle on the arc-shaped guide rail is aligned with the leak detection point on the side of the cylindrical structure.

[0006] Optionally, the arc-shaped guide rail has an inner guide groove and an outer guide groove. The drive unit includes a drive motor, a mounting plate, and two rollers. The detection nozzle, the drive motor, and the rollers are mounted on the mounting plate. One roller is positioned in the inner guide groove, and the other roller is positioned in the outer guide groove. The drive motor is poweredly connected to at least one roller, driving the roller to rotate and, under the guidance of the inner and outer guide grooves, moving the detection nozzle along the arc-shaped guide rail.

[0007] Optionally, the rolling assembly further includes a reducer, and the power end of the drive motor is poweredly connected to at least one roller through the reducer.

[0008] Optionally, the mass spectrometry leak detection assembly further includes a trachea and a trachea extension / retraction wheel. One end of the trachea is connected to the mass spectrometry leak detector, and the other end of the trachea is connected to the detection nozzle. The trachea extension / retraction wheel is disposed on one side of the mass spectrometry leak detector, and the trachea is wound around the trachea extension / retraction wheel. When the detection nozzle scans for leaks along the axial and / or circumferential direction of the cylindrical structure, the extension / retraction length of the trachea is adjusted by rotating the trachea extension / retraction wheel.

[0009] Optionally, the sliding assembly includes a first axial sliding module and a first crossbeam. One end of the first crossbeam is connected to the first axial sliding module, and the other end of the first crossbeam is connected to the guide rail. The first axial sliding module is arranged in a first direction parallel to the axial direction of the cylindrical structure. The detection nozzle is driven by the first axial sliding module to move along the guide rail in the first direction to scan and detect leaks in the axial direction of the cylindrical structure.

[0010] Optionally, the first axial sliding module includes a motor, a lead screw, and a slider. The lead screw is arranged along the first direction and is poweredly connected to the motor. The slider is sleeved on the lead screw. One end of the first crossbeam is fixed on the slider. When the motor drives the lead screw to rotate, it drives the slider to move along the lead screw, thereby driving the guide rail to move along the first direction.

[0011] Optionally, the sliding assembly includes a second axial sliding module and a second crossbeam. One end of the second crossbeam is connected to the second axial sliding module, and the other end of the second crossbeam is connected to the guide rail. The second axial sliding module is arranged parallel to the first direction along the axial direction of the cylindrical structure. The detection nozzle is driven by the second axial sliding module to move along the first direction following the guide rail to scan and detect leaks in the axial direction of the cylindrical structure.

[0012] Optionally, the second axial sliding module structure is the same as the first axial sliding module structure.

[0013] Optionally, the frame assembly includes a base and a frame body, with both the frame body and the mass spectrometry leak detection component disposed on the base, and the sliding component disposed on the frame body.

[0014] This application utilizes a frame assembly, a mass spectrometry leak detection assembly, a sliding assembly, a rolling assembly, and a guide rail. The mass spectrometry leak detection assembly and the sliding assembly are mounted on the frame assembly. The sliding assembly is dynamically connected to the guide rail and drives the guide rail to move axially along the cylindrical structure. The rolling assembly is movably mounted on the guide rail and includes a drive unit and a detection nozzle. The mass spectrometry leak detection assembly includes a mass spectrometry leak detector connected to the detection nozzle. The detection nozzle moves along the guide rail under the power of the drive unit to scan for leaks circumferentially in the cylindrical structure. The sliding assembly drives the detection nozzle to follow the guide rail and move axially along the cylindrical structure to scan for leaks axially. This reduces operation time and workload, thereby improving detection efficiency. Furthermore, axial and circumferential detection ensures comprehensive and accurate leak location detection, eliminating any missed leaks. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of an airtightness testing device for a cylindrical structural component according to this embodiment;

[0018] Figure 2 for Figure 1 A diagram from another angle;

[0019] Figure 3 for Figure 1 A schematic diagram of the scrolling component;

[0020] Figure 4 for Figure 1 A schematic diagram of the sliding component.

[0021] 1-Frame assembly, 1-1 Frame base, 1-2 Frame body, 2-Air tube retraction and extension wheel, 3-Mass spectrometer leak detector, 4, 5-Sliding assembly, 6-First crossbeam, 7-Guide rail component, 8-Rolling assembly, 9-Second crossbeam, 10-Air tube, 4_1 Motor, 4_2-Lead screw, 4_3-Connecting plate, 4_4-Base, 4_5-Slider, 8_1-Drive motor, 8_2-Reducer, 8_3-Mounting plate, 8_4-Bearing seat, 8_5-Roller, 8_6-Detection nozzle. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] like Figure 1 As shown in the embodiment of this application, an airtightness detection device for a cylindrical structure includes: a mass spectrometry leak detection component and sliding components 4 and 5 are disposed on the frame component 1. The sliding components 4 and 5 are poweredly connected to the guide rail component 7 and are used to drive the guide rail component 7 to move axially along the cylindrical structure component. A rolling component is movably disposed on the guide rail component 7. The rolling component includes a driving unit and a detection nozzle 8_6. The mass spectrometry leak detection component includes a mass spectrometry leak detector 3. The mass spectrometry leak detector 3 is connected to the detection nozzle 8_6. The detection nozzle 8_6 moves along the guide rail component 7 under the power drive of the driving unit to scan and detect leaks in the circumferential direction of the cylindrical structure component. The sliding components 4 and 5 drive the detection nozzle 8_6 to follow the guide rail component 7 to move axially along the cylindrical structure component to scan and detect leaks in the axial direction of the cylindrical structure component. This reduces operation time and workload, thereby improving detection efficiency. Furthermore, axial and circumferential detection ensures comprehensive and accurate leak location detection, eliminating any missed detections.

[0024] In one embodiment, the guide rail 7 is an arc-shaped guide rail that matches the shape of the cylindrical structure. The arc-shaped guide rail is disposed on one side of the cylindrical structure, aligning the detection nozzles on the arc-shaped guide rail with the leak detection points on the side of the cylindrical structure. In this embodiment, the guide rail 7 is an open semi-circular arc-shaped guide rail. This facilitates positioning the cylindrical structure to be tested on one side of the semi-circular arc-shaped guide rail, and also allows for positioning of the distance between the detection nozzles 8-6 and the cylindrical structure to be tested, improving the detection accuracy and efficiency of the detection nozzles 8-6. Furthermore, stops are provided at both ends of the semi-circular arc-shaped guide rail to limit the stroke of the rolling assembly 8 on the guide rail 7, preventing the rolling assembly 8 from slipping off the guide rail 7 during movement.

[0025] In one embodiment, the arc-shaped guide rail has an inner guide groove and an outer guide groove. The driving unit includes a drive motor 8_1, a mounting plate 8_3, and two rollers 8_5. The detection nozzle 8_6, the drive motor 8_1, and the rollers 8_5 are mounted on the mounting plate 8_3. One roller 8_5 is positioned in the inner guide groove, and the other roller 8_5 is positioned in the outer guide groove. The drive motor 8_1 is poweredly connected to at least one roller 8_5, driving the roller 8_5 to rotate and, under the guidance of the inner and outer guide grooves, moving the detection nozzle 8_6 along the arc-shaped guide rail. By driving the two rollers 8_5 through the drive motor 8_1, the detection nozzle 8_6 on the mounting plate 8_3 is moved circumferentially, causing the detection nozzle 8_6 to move along the guide rail 7 to detect whether there is air leakage at different circumferential positions of the device under test. This facilitates detection, avoids manual inspection, and prevents missed detections.

[0026] In one embodiment, the rolling assembly further includes a reducer 8_2, and the power end of the drive motor 8_1 is poweredly connected to at least one roller 8_5 through the reducer 8_2. Optionally, the rolling assembly 8 further includes two bearing seats 8-4, the reducer 8-2 and the two bearing seats 8-4 are respectively disposed on opposite sides of the mounting plate 8-3, the two rollers 8-2 are respectively disposed on the two bearing seats 8-4, and the shaft of the drive motor 8-1 is connected to the drive motor 8-1 and passes through the mounting plate 8-3 to connect with the rollers 8-5. The drive motor 8-1 drives the reducer 8-2, the bearing seats 8-4 and the rollers 8-5, thereby causing the rollers 8-5 to move circumferentially on the guide rail 7. Further, the motor output shaft of the drive motor 8-1 is connected to the input shaft of the reducer 8-2 by a keyway. The reducer 8-2 is fixed to one side of the mounting plate 8-3 by screws. The mounting plate 8-3 has two through holes for mounting the bearing housing 8-4. The roller 8-5 shaft and the inner ring of the bearing housing 8-4 are interference-fitted. The roller 8-5 shaft is connected to the output shaft of the reducer 8-2 via a keyway. When the drive motor 8-1 is working, the circumferential rolling assembly 8 moves circumferentially along the arc-shaped guide rail 7. When the detection nozzle 8-6 moves, one end of the air pipe 10 moves with the detection nozzle 8-6, and the air pipe 10 is extended or retracted by the air pipe 10 extension / retraction wheel 2.

[0027] In one embodiment, the mass spectrometry leak detection assembly further includes a trachea 10 and a trachea extension / retraction wheel 2. One end of the trachea 10 is connected to the mass spectrometry leak detector 3, and the other end is connected to the detection nozzle 8-6. The trachea extension / retraction wheel 2 is disposed on one side of the mass spectrometry leak detector 3, and the trachea 10 is wound around the trachea extension / retraction wheel 2. When the detection nozzle 8-6 scans for leaks along the axial and / or circumferential direction of the cylindrical structure, the extension / retraction length of the trachea 10 is adjusted by rotating the trachea extension / retraction wheel 2. When the trachea extension / retraction wheel 2 rotates clockwise or counterclockwise, the length of the trachea 10 extends or shortens with the movement of the detection nozzle 8-6, thereby facilitating the extension or retraction of the trachea 10 and preventing insufficient length or inability to retract the trachea 10. During leak detection, helium gas is introduced into the cylindrical structure, and the entire outer surface of the cylindrical structure is scanned through the detection nozzle 8-6. The results of the mass spectrometer leak detector are used to determine whether there are leaks on the cylindrical structure and to locate the leaks.

[0028] In one embodiment, the sliding assembly includes a first axial sliding module and a first crossbeam 6. One end of the first crossbeam 6 is connected to the first axial sliding module, and the other end of the first crossbeam 6 is connected to the guide rail 7. The first axial sliding module is arranged in a first direction parallel to the axial direction of the cylindrical structure. The detection nozzle is driven by the first axial sliding module to move along the guide rail 7 in the first direction to scan and detect leaks in the axial direction of the cylindrical structure. By driving the first crossbeam 6 to move axially through the first axial sliding module, the guide rail 7 is moved axially, causing the detection nozzle on the guide rail 7 to move axially, thus achieving comprehensive and accurate detection of whether the device under test is leaking.

[0029] In one embodiment, the first axial sliding module includes a motor 4_1, a lead screw 4_2, and a slider 4_5. The lead screw 4_2 is arranged along the first direction and is poweredly connected to the motor 4_1. The slider 4_5 is sleeved on the lead screw 4_2. One end of the first crossbeam is fixed on the slider 4_5. When the motor 4_1 drives the lead screw 4_2 to rotate, it drives the slider 4_5 to move along the lead screw 4_2, thereby driving the guide rail to move along the first direction. By driving the lead screw 4_2 to rotate, the slider moves the guide rail 7, which in turn drives the guide rail to move, thus achieving accurate detection of whether the device to be tested is leaking air. Optionally, the first axial sliding module also includes a base and a connecting plate 4_3. The motor 4_1 is arranged on one side of the base 4_4 and connected to the lead screw 4_2. The slider 4_5 is sleeved on the lead screw 4_2. The connecting plate 4_3 is arranged on the slider 4_5 and connected to the first crossbeam 6. Optionally, a sliding motor 4-1 is fixed to one end of the base 4-4 with screws and connected to the lead screw 4-2 via a coupling. The lead screw 4-2 is fixed to the base 4-4 by bearings at both ends and can rotate freely. A threaded hole is formed in the middle of the slider 4-5, matching the thread of the lead screw 4-2. When the lead screw 4-2 rotates, the slider 4-5 can slide on the base 4-4. The slider 4-5 has four threaded holes and is fixed to the connecting plate 4-3 with screws.

[0030] In one embodiment, the sliding assembly includes a second axial sliding module and a second crossbeam 9. One end of the second crossbeam 9 is connected to the second axial sliding module, and the other end is connected to the guide rail 7. The second axial sliding module is arranged parallel to the first direction along the axial direction of the cylindrical structure. The second axial sliding module drives the detection nozzle to move along the first direction following the guide rail 7 to scan and detect leaks along the axial direction of the cylindrical structure. The first and second axial sliding modules provide more stable horizontal movement of the guide rail 7 and can stably support the guide rail 7 for a long time, preventing the guide rail 7 from falling off.

[0031] In one embodiment, the second axial sliding module and the first axial sliding module have the same structure. Since the second axial sliding module and the first axial sliding module have the same structure, the effect is the same as that produced by the first axial sliding module, and will not be described again here.

[0032] In one embodiment, the frame assembly 1 includes a base 1-1 and a frame body 1-2. Both the frame body 1-2 and the mass spectrometer leak detection assembly are mounted on the base 1-1, and the sliding components 4 and 5 are mounted on the frame body 1-2. Optionally, the assembly is welded from channel steel. The base 1-1 is U-shaped, with a square groove welded to the bottom center to provide placement space for the helium mass spectrometer leak detector 3. Two uprights are welded to the frame body 1-2, with threaded holes on the uprights to provide mounting interfaces for the axial sliding components 4 and 5. The air tube 10 take-up and put-down wheels 2 are fixed to the base 1-1 with screws, and the air tube 10 is wound around the air tube 10 take-up and put-down wheels 2 for storage. When the device is in operation, the arc-shaped guide rail moves axially together with the connecting plate 4-3 of the axial sliding mechanism.

[0033] In summary, during operation, the sliding motor 4-1 rotates, driving the lead screw 4-2 to rotate. The slide table moves axially, moving the circumferential rolling mechanism to the surface of the cylinder to be inspected, aligning the detection nozzle 8-6 on the circumferential rolling assembly 8 with the weld or screw interface on the cylinder. The rolling motor begins to rotate at a constant speed, driving the detection nozzle 8-6 to move circumferentially across the cylinder surface, completing the scanning of the weld or screw interface. When the scanning of the weld or screw interface on the same circumferential section of the cylinder is completed, the slide table motor continues to rotate, moving the circumferential rolling assembly 8 to the next section for scanning, until the automatic scanning of all sections of the cylinder is completed.

[0034] In summary, the embodiments of the present invention provide an airtightness detection device for cylindrical structural components. This device can not only realize the automatic scanning of the axial and circumferential directions of the detection nozzles 8-6 by the helium mass spectrometer leak detector 3, thereby improving the detection efficiency, but also control the scanning rate of the detection nozzles 8-6 by a motor, thereby reducing the problem of inaccurate leak location detection.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An airtightness testing device for a cylindrical structural component, characterized in that, include: The system comprises a frame assembly, a mass spectrometry leak detection assembly, a sliding assembly, a rolling assembly, and a guide rail. The mass spectrometry leak detection assembly and the sliding assembly are mounted on the frame assembly. The sliding assembly is dynamically connected to the guide rail and drives the guide rail to move axially along the cylindrical structure. The rolling assembly is movably mounted on the guide rail and includes a drive unit and a detection nozzle. The mass spectrometry leak detection assembly includes a mass spectrometry leak detector connected to the detection nozzle. The detection nozzle moves along the guide rail under the power of the drive unit to scan for leaks in the circumference of the cylindrical structure. The sliding assembly drives the detection nozzle to follow the guide rail along the cylindrical structure. Axial movement is used to scan and detect leaks along the axial direction of the cylindrical structure. The guide rail is an arc-shaped guide rail that matches the shape of the cylindrical structure and is an open semi-circular arc-shaped guide rail. The semi-circular arc-shaped guide rail is located on one side of the cylindrical structure, aligning the detection nozzle on the arc-shaped guide rail with the leak detection point on the side of the cylindrical structure. Stops are provided at both ends of the semi-circular arc-shaped guide rail to limit the travel of the rolling assembly along the semi-circular arc-shaped guide rail, preventing the rolling assembly from slipping off the guide rail. The arc-shaped guide rail has inner and outer guide grooves extending circumferentially. The drive unit includes a drive motor, a mounting plate, and two rollers. The detection nozzle, the drive motor, and the rollers are located on... On the mounting plate, one roller is positioned in the inner guide groove, and another roller is positioned in the outer guide groove. The drive motor is poweredly connected to at least one roller, driving the roller to rotate and, under the guidance of the inner and outer guide grooves, moving the detection nozzle along the arc-shaped guide rail. The rolling assembly also includes a reducer, and the power end of the drive motor is poweredly connected to at least one roller through the reducer. The rolling assembly also includes two bearing seats, with the reducer and the two bearing seats respectively disposed on opposite sides of the mounting plate, and the two rollers respectively disposed on the two bearing seats. The motor output shaft of the drive motor is connected to the input shaft of the reducer through a keyway. The roller shaft of the wheel is interference-fitted with the inner ring of the bearing housing, and the roller shaft is connected to the output shaft of the reducer via a keyway; the sliding assembly includes a first axial sliding module and a second axial sliding module located at both ends of the arc-shaped guide rail. The first axial sliding module is arranged along the first direction and connected to one end of the arc-shaped guide rail via a first crossbeam. The second axial sliding module is arranged along the first direction and connected to the other end of the arc-shaped guide rail via a second crossbeam, so that the arc-shaped guide rail moves as a whole along the first direction under the joint drive of the first axial sliding module and the second axial sliding module, thereby achieving stable axial scanning and leak detection support for long cylindrical structural components;The first axial sliding module includes a motor, a lead screw, a slider, a base, and a connecting plate. The lead screw is arranged along the first direction and is powered by the motor. The slider is sleeved on the lead screw, and the connecting plate is disposed on the slider. One end of the first crossbeam is fixed on the connecting plate. When the motor drives the lead screw to rotate, it causes the slider to move along the lead screw, thereby causing the guide rail to move along the first direction. The second axial sliding module has the same structure as the first axial sliding module. The mass spectrometer leak detection assembly also includes a gas tube and a gas tube extension / retraction wheel. One end of the gas tube is connected to the mass spectrometer leak detector, and the other end of the gas tube is connected to the detection nozzle. The gas tube extension / retraction wheel is disposed on one side of the mass spectrometer leak detector, and the gas tube is wound around the gas tube extension / retraction wheel. When the detection nozzle scans for leaks along the axial and / or circumferential direction of the cylindrical structure, the extension / retraction length of the gas tube is adjusted by rotating the gas tube extension / retraction wheel.

2. The airtightness testing device for cylindrical structural components according to claim 1, characterized in that, The frame assembly includes a base and a frame body. The frame body and the mass spectrometry leak detection component are both mounted on the base, and the sliding component is mounted on the frame body.

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