A high pressure flange air tightness detection device

Abstract

The invention discloses a high-pressure flange air tightness detection device, comprising a base, a support frame is arranged on one side of the upper end surface of the base, a mounting sleeve is arranged in the support frame, a pressure mechanism for increasing air pressure is arranged on the inner side of the mounting sleeve, a positioning component for fixing the flange is arranged at the opening of the mounting sleeve, a sealing mechanism is movably arranged on the side of the upper end surface of the base away from the support frame, the sealing mechanism is used to control the clamping force of the flange connection part, and a controller and an air pressure sensor are also arranged on the sealing mechanism. The invention has a simple structure and a reasonable design, and the whole operation process is simple and convenient, which significantly improves the pressure relief efficiency of the flange when the air pressure is abnormal, effectively avoids the occurrence of explosion, and because the gas is not discharged in the telescopic sleeve during the pressure reduction process, it is avoided that the high-pressure gas causes harm to the staff during the pressure relief process, thereby ensuring the safety of the air tightness detection equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of sealing detection equipment, and specifically provides a high-pressure flange airtightness detection device. Background Art

[0002] With the continuous progress of industrial technology, high-pressure gas transmission pipelines have been widely used in multiple fields such as petroleum, chemical industry, and natural gas. In these systems, flanges, especially high-pressure flanges, as key components for connecting pipelines, their airtightness is directly related to the safety and stability of the entire system. Therefore, strict airtightness detection of high-pressure flanges is an important link to ensure the safe operation of the system. Currently, the commonly used methods for detecting the airtightness of high-pressure flanges in the market mainly involve injecting high-pressure gas into the inner side of the flanges connected by seals through a pressure boosting device and maintaining the pressure for observation, so as to draw conclusions related to the sealing performance.

[0003] The traditional devices have the following deficiencies:

[0004] In the prior art, although the pneumatic test can effectively evaluate the airtightness of flanges, in the face of possible quality problems of the flanges themselves, especially material defects caused by unqualified heat treatment, this detection method faces huge safety hazards. When the flange fails to meet the specified strength and toughness standards during the heat treatment process, it is extremely likely to explode during the pressure boosting process. Such an explosion will not only cause equipment damage and production line interruption, but may also trigger serious safety accidents, causing inestimable harm to personnel and the environment. Existing airtightness detection equipment has a certain degree of protection function to a certain extent. Since cracks will appear in the flange before it explodes, the cracks will cause the air pressure inside the flange to increase slowly or even decrease. When the equipment detects abnormal air pressure, it will respond quickly and reduce the system pressure by stopping the pressure boosting or opening the solenoid valve to exhaust air. However, such equipment still has obvious deficiencies in dealing with the explosion risk of high-pressure flanges. Specifically, due to the diameter limitation of the exhaust holes, when the equipment detects abnormal air pressure during the pressure boosting process and implements pressure reduction measures, it often takes a long time to complete the pressure release, while the process from abnormal air pressure to actual explosion of the flange may be very short. This mismatch in time makes the existing pressure reduction methods difficult to effectively prevent the explosion of the flange before it occurs, and it is very likely that the release of high-pressure gas will also cause harm to nearby workers, thus unable to meet the high standards of explosion-proof performance requirements for airtightness detection equipment in the current industrial field. Summary of the Invention

[0005] The purpose of the present invention is to provide a high-pressure flange airtightness detection device to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A high-pressure flange airtightness detection device, including a base, on one side of the upper end surface of the base, there is a support frame, inside the support frame, there is a mounting sleeve, inside the mounting sleeve, there is a pressure mechanism for increasing air pressure, at the opening of the mounting sleeve, there is a positioning component for fixing the flange, on the side of the upper end surface of the base away from the support frame, there is a sealing mechanism movably arranged, the sealing mechanism is used to control the pressing force at the flange connection part, and on the sealing mechanism, there are also a controller and a pneumatic sensor;

[0007] The pressure mechanism includes:

[0008] A telescopic sleeve, the telescopic sleeve is movably arranged at the end of the mounting sleeve and the sleeve opening of the telescopic sleeve is sleeved outside the opening of the mounting sleeve, at the inner end of the telescopic sleeve located inside the mounting sleeve, there is a connection disk, on the inner wall of the mounting sleeve, there are several transverse grooves opened, and the outside of the connection disk is slidably connected in the transverse grooves through the arranged sliders;

[0009] A mounting groove, the mounting groove is horizontally opened on the inner wall of the mounting sleeve and is distributed at intervals with the transverse grooves, inside the mounting groove, there is an arc-shaped threaded sliding plate movably arranged, the centers of the cross-sections of the threaded sliding plates are all at the same point, on the main body of the mounting sleeve outside the mounting groove, there is an electromagnetic sheet, and inside the threaded sliding plate, there is a permanent magnetic sheet matched with the electromagnetic sheet embedded;

[0010] A sliding frame, the sliding frame is slidably connected in the transverse groove, inside the sliding frame, there is a driving motor, the output end of the driving motor is connected with a speed reducer, the end of the speed reducer is connected with a stud, the other end of the stud is rotatably connected with the connection disk, and the external thread of the stud is matched with the internal thread on the threaded sliding plate;

[0011] A telescopic airbag, the telescopic airbag is arranged at the end of the mounting sleeve on one side of the sliding frame.

[0012] Preferably, the sealing mechanism includes:

[0013] A support seat, the support seat is movably arranged on the upper end surface of the base, on the upper end of the support seat, there is a mounting cavity, and inside the mounting cavity, there is an electromagnetic disk;

[0014] A sliding sleeve, the sliding sleeve is slidably connected in the mounting cavity, inside the sliding sleeve, there is a permanent magnetic disk matched with the electromagnetic disk embedded, on the end surface of the permanent magnetic disk located inside the sliding sleeve, there is a sealing rubber seat, and the pneumatic sensor is arranged on the end surface of the sealing rubber seat;

[0015] An air inlet pipe, the end of the air inlet pipe sequentially penetrates through the through holes on the support seat, the electromagnetic disk, the sliding sleeve, the permanent magnetic disk and the sealing rubber seat and is fixedly connected with the end surface of the sealing rubber seat.

[0016] Preferably, the positioning component includes:

[0017] An extension part, which is arranged on the outer wall of the end of the mounting sleeve. A plurality of positioning holes are arranged on the end face of the side of the extension part adjacent to the support seat. A connecting cross bar is slidably connected in the positioning holes. A hexagonal part is arranged on the rod body of the connecting cross bar for rotating the main body of the connecting cross bar;

[0018] A clamping ring, which is movably arranged on one side of the extension part. A plurality of internal thread sleeves are arranged on the end face of the clamping ring. The internal thread sleeves are threadedly connected with the ends of the connecting cross bars. The diameter of the internal thread sleeves matches the bolt holes on the flange.

[0019] A thick sealing ring, which is movably arranged inside the clamping ring and is used for sealing during the detection of the flange sealing surface.

[0020] Preferably, a rubber pad is bonded to the end face of the clamping ring on the side of the internal thread sleeve to protect the stressed part of the flange.

[0021] Preferably, the inner diameter of the opening part of the support seat is larger than the outer diameter of the clamping ring.

[0022] Preferably, the controller is installed on the side wall at the lower end of the support seat. The controller is electrically connected to the electromagnetic sheet, the driving motor, the electromagnetic disk and the air pressure sensor through wires respectively.

[0023] Preferably, both the telescopic sleeve and the telescopic airbag are made of rubber material and are in a corrugated shape.

[0024] Preferably, the transverse groove runs through the entire inner wall of the mounting sleeve.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] By setting a pressure mechanism, the present invention utilizes the extrusion of the telescopic sleeve to achieve the pressurization effect inside the flange. When abnormal air pressure is detected, the threaded sliding piece is quickly retracted into the installation groove. The end of the telescopic sleeve loses the horizontal constraint and is instantly stretched, and the air pressure inside the flange is also instantly reduced. The whole operation process is simple and convenient, significantly improving the pressure relief efficiency of the flange when the air pressure is abnormal, effectively avoiding the occurrence of explosion, and since the gas is still in the telescopic sleeve and not discharged during the pressure reduction process, it avoids the harm caused by high-pressure gas to the staff during the pressure relief process, ensuring the safety of the airtightness detection equipment. At the same time, the pressurization by pushing the telescopic sleeve also significantly improves the sealing performance of the equipment itself, and the mounting sleeve sleeved outside the telescopic sleeve and the telescopic airbag to prevent its radial deformation also significantly improves the pressure-bearing limit of the telescopic sleeve and the telescopic airbag;

[0027] By providing a sealing mechanism, the present invention realizes precise control of the sealing clamping force of the flange by adjusting the current magnitude on the electromagnetic disk during the airtightness detection of the flange, enabling the entire detection process of the flange to simulate the actual clamping effect of the bolt under normal working conditions, avoiding excessive or insufficient clamping pressure, and further enhancing the accuracy and reliability of the detection results.

[0028] By providing a positioning component, the present invention realizes pre-positioning and sealing of the single-sided flange and the telescopic sleeve at the port of the mounting sleeve. The sealing effect of the telescopic sleeve is only controlled by the connecting cross bar and is not affected by the pressing force of the sealing mechanism. The detection results are more controllable. The sealing mechanism can dock the other side flange according to the magnitude of the bolt clamping force under actual working conditions, which also simplifies the operation process of the sealing mechanism, improves the sealing efficiency, and such a fixing method also avoids damage to the flange during the detection process, affecting secondary sales. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is the overall three-dimensional view of the present invention;

[0030] Figure 2 is the overall front view of the present invention;

[0031] Figure 3 is the schematic front view of the internal structure of the present invention;

[0032] Figure 4 is the Figure 3 magnified schematic view at A in the present invention;

[0033] Figure 5 is the Figure 3 magnified schematic view at B in the present invention;

[0034] Figure 6 is the schematic view of the internal structure of the mounting sleeve and the support seat of the present invention;

[0035] Figure 7 is the schematic view of the stud installation of the present invention;

[0036] Figure 8 is the schematic side view of the internal structure of the mounting sleeve of the present invention;

[0037] Figure 9 is the schematic view of the connection between the sliding frame and the transverse groove of the present invention;

[0038] Figure 10 is the schematic view of the flange pressing of the present invention;

[0039] Figure 11 is the three-dimensional schematic view of the telescopic sleeve and the telescopic airbag of the present invention.

[0040] In the figure: 1, base; 2, support frame; 3, mounting sleeve; 4, pressure mechanism; 401, telescopic sleeve; 402, connecting plate; 403, transverse groove; 404, mounting groove; 405, threaded sliding piece; 406, electromagnetic sheet; 407, permanent magnet sheet; 408, sliding frame; 409, drive motor; 410, reducer; 411, stud; 412, telescopic airbag; 5, positioning component; 501, extension part; 502, positioning hole; 503, connecting cross bar; 504, hexagonal part; 505, clamping ring; 506, internal thread sleeve; 507, thick sealing ring; 6, sealing mechanism; 601, support seat; 602, mounting cavity; 603, electromagnetic disk; 604, sliding sleeve; 605, permanent magnet disk; 606, sealing glue seat; 607, air inlet pipe; 7, controller; 8, air pressure sensor; 9, rubber pad; 10, flange A; 11, flange B. Detailed implementation mode

[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0042] It should be noted that when an element is referred to as being "fixed", "installed", "connected" or "disposed" on another element, it can be directly on the other element or indirectly on the other element. It should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0043] As a further improvement of the present invention, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0044] Please refer to Figures 1-11As shown in the figure, the present invention provides a technical solution for a high-pressure flange airtightness detection device: a high-pressure flange airtightness detection device, including a base 1. On one side of the upper end surface of the base 1, a support frame 2 is fixedly installed. Inside the support frame 2, an installation sleeve 3 is fixedly installed. Inside the installation sleeve 3, a pressure mechanism 4 for increasing the air pressure during airtightness detection is installed. When the flange is subjected to airtightness detection, it is necessary to simulate the seal with a mutually adapted A flange 10 and B flange 11. At the opening of the installation sleeve 3, a positioning component 5 for fixing the A flange 10 is installed. On the side of the upper end surface of the base 1 away from the support frame 2, a sealing mechanism 6 is movably installed. The sealing mechanism 6 is used to control the pressing force at the flange connection part. A controller 7 and a pressure sensor 8 are also installed on the sealing mechanism 6;

[0045] The pressure mechanism 4 includes a telescopic sleeve 401, an installation groove 404, a sliding frame 408, and a telescopic airbag 412. The telescopic sleeve 401 is movably installed at the end of the installation sleeve 3, and the sleeve opening of the telescopic sleeve 401 is sleeved outside the opening of the installation sleeve 3. At the inner end of the telescopic sleeve 401 located inside the installation sleeve 3, a connection disk 402 is fixedly connected. A number of horizontal grooves 403 are opened on the inner wall of the installation sleeve 3. The outside of the connection disk 402 is slidably connected in the horizontal groove 403 through a slider. The installation groove 404 is horizontally opened on the inner wall of the installation sleeve 3 and is distributed at intervals with the horizontal groove 403. An arc-shaped threaded sliding piece 405 is movably installed in the installation groove 404. The threaded sliding piece 405 slides along the groove opening in the installation groove 404. The centers of the cross-sections of the threaded sliding piece 405 are all at the same point. An electromagnetic sheet 406 is installed on the main body of the installation sleeve 3 outside the installation groove 404. A permanent magnet sheet 407 matching the electromagnetic sheet 406 is embedded in the threaded sliding piece 405. The sliding frame 408 is slidably connected in the horizontal groove 403 through a slider. A driving motor 409 is installed inside the sliding frame 408. This driving motor 409 can be a DC brushless motor. The output end of the driving motor 409 is connected to a speed reducer 410. The end of the speed reducer 410 is connected to a stud 411. The other end of the stud 411 is rotatably connected to the connection disk 402. The external thread of the stud 411 matches the internal thread on the threaded sliding piece 405.

[0046] After the electromagnetic sheet 406 is powered on, it generates a repulsive force on the permanent magnet sheet 407, causing the threaded sliding sheet 405 to extend out of the installation groove 404 and the internal thread on its inner side to engage with the external thread of the stud 411. The sliding frame 408 can only move horizontally along the inner wall of the installation sleeve 3 under the limiting action of the slider and the horizontal groove 403 and cannot rotate. Therefore, the driving motor 409 drives the rotation of the stud 411 relative to the threaded sliding sheet 405, driving itself and the sliding frame 408 to move horizontally in the installation sleeve 3 to achieve the purpose of applying pressure to the telescopic sleeve 401. The telescopic airbag 412 is movably installed at one end of the installation sleeve 3 on the side of the sliding frame 408. When the sliding frame 408 moves rapidly towards the telescopic airbag 412, the telescopic airbag 412 can provide sufficient support and buffering. The pressure-bearing limit of the telescopic airbag 412 should be greater than the pressure-bearing limit of the telescopic sleeve 401.

[0047] When the airtightness detection device needs to be pressurized, first move the telescopic sleeve 401, the stud 411, and the sliding frame 408 to appropriate positions. Then, power on the electromagnetic sheet 406 to apply sufficient thrust to the permanent magnet sheet 407 until the threaded sliding sheet 405 is stably engaged with the stud 411. Next, start the driving motor 409. The driving motor 409 drives the stud 411 to rotate through the reducer 410. The stud 411 moves towards the telescopic sleeve 401 under the action of the threaded sliding sheet 405 and compresses the telescopic sleeve 401 until the specified air pressure is reached inside the telescopic sleeve 401. Then, control the driving motor 409 to turn off through the controller 7. Under the self-locking action of the driving motor 409, both the telescopic sleeve 401 and the sliding frame 408 are in a stable state, and the inside of the telescopic sleeve 401 is kept pressurized. If during the rotation and pressurization process of the driving motor 409 and the stud 411, the controller 7 detects that the air pressure inside the flange is abnormal and there is a risk of explosion, at this time, the controller 7 quickly controls the electromagnetic sheet 406 to change the direction of the passing current, thereby generating an attractive force on the permanent magnet sheet 407. After the threaded sliding sheet 405 retracts into the installation groove 404, it separates from the stud 411. At this time, the stud 411 and the sliding frame 408 lose their corresponding constraints and quickly slide backward under the push of the high-pressure gas inside the telescopic sleeve 401. The telescopic sleeve 401 extends, and the internal air pressure decreases rapidly. When the sliding frame 408 moves to the end of the installation sleeve 3, the telescopic airbag 412 provides buffering to prevent the sliding frame 408 from colliding violently with the inner wall of the installation sleeve 3.

[0048] Through the pressure mechanism 4, the pressurization effect inside the flange is achieved by squeezing the telescopic sleeve 401. When abnormal air pressure is detected, the threaded sliding piece 405 is quickly retracted into the installation groove 404. The end of the telescopic sleeve 401 loses horizontal restraint and can be stretched instantly, and the air pressure inside the flange also drops instantly. The whole process is simple and convenient, significantly improving the pressure relief efficiency of the flange in case of abnormal air pressure, effectively avoiding the occurrence of explosion. And since the gas is still in the telescopic sleeve 401 and not discharged during the pressure reduction process, it avoids the harm caused by high-pressure gas to the staff during the pressure relief process, ensuring the safety of the airtightness detection equipment. At the same time, pressing by pushing the telescopic sleeve 401 also significantly improves the sealing performance of the equipment itself. The installation sleeve 3 is sleeved outside the telescopic sleeve 401 and the expansion airbag 412 to prevent radial deformation, which also significantly increases the pressure-bearing limit of the two.

[0049] The sealing mechanism 6 includes a support base 601, a sliding sleeve 604 and an air inlet pipe 607. The support base 601 is movably installed in the slide rail on the upper end surface of the base 1. The support base 601 slides and positions along the slide rail on the upper end surface of the base 1. An installation cavity 602 is opened at the upper end of the support base 601, and an electromagnetic disk 603 is fixedly installed inside the installation cavity 602. The sliding sleeve 604 is slidably connected in the installation cavity 602. A permanent magnetic disk 605 matching the electromagnetic disk 603 is embedded inside the sliding sleeve 604. The sliding sleeve 604 moves horizontally along the installation cavity 602 under the combined action of the attraction and repulsion forces of the permanent magnetic disk 605 and the electromagnetic disk 603. A sealing glue seat 606 is bonded to the end surface of the permanent magnetic disk 605 inside the sliding sleeve 604. The air pressure sensor 8 is installed on the end surface of the sealing glue seat 606 to detect the real-time air pressure inside the flange. The end of the air inlet pipe 607 sequentially penetrates through the through holes on the support base 601, the electromagnetic disk 603, the sliding sleeve 604, the permanent magnetic disk 605 and the sealing glue seat 606 and is fixedly connected to the end surface of the sealing glue seat 606 for initially adjusting the air pressure inside the flange before pressing.

[0050] When the equipment needs to perform airtightness detection on the flange, first move the support base 601 along the track on the base 1 to the side away from the installation sleeve 3 to leave enough operating space. Then, put the B flange 11 on the sealing glue seat 606, inside the sliding sleeve 604. After the A flange 10 is positioned, the support base 601 can be moved towards the installation sleeve 3 to the specified position to adjust the distance between the A flange 10 and the B flange 11. At this time, the controller 7 is used to control the current with a specified direction and magnitude to be passed into the electromagnetic disk 603, so that the electromagnetic disk 603 generates a constant repulsive force on the permanent magnetic disk 605, and the magnitude of this repulsive force is the same as the clamping force applied when the A flange 10 and the B flange 11 are bolted. At this time, the A flange 10 and the B flange 11 are pressed tightly and can be tested by pressing. When it is necessary to adjust the magnitude of the clamping force, just adjust the current magnitude of the electromagnetic disk 603.

[0051] Through the sealing mechanism 6, when performing the airtightness detection on the flange, the accurate control of the sealing clamping force of the electromagnetic disk 603 can be achieved by adjusting the current magnitude on the electromagnetic disk 603, enabling the entire detection process of the flange to simulate the actual clamping effect of the bolt under normal working conditions, avoiding excessive or insufficient pressure, and further improving the accuracy and reliability of the detection results.

[0052] The positioning component 5 includes an extension part 501, a clamping ring 505, and a thick sealing ring 507. The extension part 501 is arranged on the outer wall of the end of the mounting sleeve 3. On the end face of the side of the extension part 501 adjacent to the support seat 601, a plurality of positioning holes 502 are provided. A connecting cross bar 503 is slidably connected in the positioning holes 502. An hexagonal part 504 is integrally formed on the rod body of the connecting cross bar 503 for rotating the main body of the connecting cross bar 503. The clamping ring 505 is movably installed on one side of the extension part 501 for fixing the A flange 10. A plurality of internal thread sleeves 506 are provided on the end face of the clamping ring 505. The internal thread sleeves 506 are threadedly connected to the ends of the connecting cross bars 503. The diameter of the internal thread sleeves 506 matches the bolt holes on the flange. The A flange 10 is hung on the internal thread sleeves 506 through the bolt holes. A rubber pad 9 is bonded on the end face of the clamping ring 505 on the side of the internal thread sleeve 506 for protecting the stressed part of the flange. The thick sealing ring 507 is movably installed inside the clamping ring 505 and can be flexibly disassembled. The thick sealing ring 507 is used for sealing during the detection of the flange sealing surface.

[0053] When it is necessary to fix the A flange 10, first rotate the connecting cross bar 503 by turning the hexagonal part 504 to remove the clamping ring 505. Subsequently, hang the corresponding A flange 10 on the internal thread sleeves 506 of the clamping ring 505 through its own bolt holes. Then, reconnect the clamping ring 505 to the connecting cross bar 503 through the internal thread sleeves 506 and tighten the connecting cross bar 503 to ensure the installation stability of the A flange 10. At the same time, the pressing force provided by the connecting cross bar 503 also ensures the sealing effect between the two sides of the sleeve mouth of the telescopic sleeve 401 and the end face of the A flange 10 and the port of the mounting sleeve 3 respectively. Finally, place the thick sealing ring 507 on the sealing surfaces of the clamping ring 505 and the A flange 10. When the sealing surfaces of the A flange 10 and the B flange 11 are connected, the thick sealing ring 507 can ensure effective fitting with the sealing surfaces of the two flanges on both sides.

[0054] Through the positioning component 5, the pre-positioning and sealing of the single-sided flange and the telescopic sleeve 401 at the port of the mounting sleeve 3 are realized. The sealing effect of the telescopic sleeve 401 is only controlled by the connecting cross bar 503 and is not affected by the pressing force of the sealing mechanism 6. The detection result is more controllable. The sealing mechanism 6 only needs to dock the other flange according to the magnitude of the bolt clamping force under the actual working conditions, which also simplifies the operation process of the sealing mechanism 6, improves the sealing efficiency, and such a fixing method also avoids damage to the flange during the detection process, affecting secondary sales.

[0055] During the actual detection process, the opening of the support base 601 should be sleeved outside the clamping ring 505. Therefore, the inner diameter of the opening of the support base 601 being larger than the outer diameter of the clamping ring 505 can avoid mutual interference.

[0056] The controller 7 is installed on the side wall at the lower end of the support base 601. The controller 7 is electrically connected to the electromagnetic sheet 406, the drive motor 409, the electromagnetic disk 603, and the air pressure sensor 8 through wires respectively. After receiving the electrical signal from the air pressure sensor 8, the controller 7 controls the electromagnetic sheet 406, the drive motor 409, and the electromagnetic disk 603 through wires respectively to ensure the stable operation of the device.

[0057] Both the telescopic sleeve 401 and the telescopic airbag 412 are made of rubber material and are in the shape of bellows. The bellows shape is beneficial for more precisely controlling the telescopic profile and path.

[0058] The transverse groove 403 runs across the entire inner wall of the mounting sleeve 3. The relatively long length of the transverse groove 403 also provides a larger stroke for the telescopic sleeve 401 and the sliding frame 408, further optimizing the limit and buffering ability of the pressure application.

[0059] Working principle: When using the present invention to perform airtightness detection on the flange, first move the support base 601 along the track on the base 1 to the side far from the mounting sleeve 3 to leave enough operating space, then remove the clamping ring 505. Subsequently, hang the corresponding flange A 10 on the internal thread sleeve 506 of the clamping ring 505 through its own bolt holes, and then reconnect the clamping ring 505 to the connecting cross bar 503 through the internal thread sleeve 506 and tighten the connecting cross bar 503 to ensure that the two sides of the sleeve opening of the telescopic sleeve 401 are closely attached to the end face of the flange A 10 and the port of the mounting sleeve 3 respectively. Finally, place the thick sealing ring 507 on the sealing surfaces of the clamping ring 505 and the flange A 10. At this time, the sealing of the flange can be carried out. Sleeve the flange B 11 on the sealing rubber seat 606, and move the support base 601 towards the mounting sleeve 3 to the specified position. Adjust the distance between the flange A 10 and the flange B 11 and then fix the support base 601. At this time, control the controller 7 to pass a current with a specified direction and magnitude into the electromagnetic disk 603, so that the electromagnetic disk 603 generates a constant repulsive force on the permanent magnetic disk 605, which is used to simulate the clamping force applied to the two flanges during bolt tightening under normal working conditions. At this time, initially adjust the air pressure inside the flange through the air inlet pipe 607. After the sliding frame 408, the stud 411, etc. are all in the accurate positions, the airtightness test can be carried out.

[0060] First, the controller 7 controls the electromagnetic sheet 406 to be energized to generate a repulsive force on the permanent magnet sheet 407, so that the threaded sliding sheet 405 and the stud 411 are stably engaged. Then, the driving motor 409 is started. The driving motor 409 drives the stud 411 to rotate. Under the action of the threaded sliding sheet 405, the stud 411 compresses the telescopic sleeve 401 until the specified air pressure is reached inside the telescopic sleeve 401. Then, the controller 7 is triggered by the air pressure sensor 8 and controls the driving motor 409 to shut down. Due to the self-locking effect of the driving motor 409, both the telescopic sleeve 401 and the sliding frame 408 are in a stable state, and the air pressure inside the telescopic sleeve 401 is maintained. If during the rotation and pressurization process of the driving motor 409 and the stud 411, the controller 7 detects through the air pressure sensor 8 that the air pressure inside the flange is abnormal and there is a risk of explosion, at this time, the controller 7 quickly controls the electromagnetic sheet 406 to change the direction of the passing current, thereby generating an attractive force on the permanent magnet sheet 407. The threaded sliding sheet 405 instantly shrinks into the installation groove 404 and separates from the stud 411. At this time, after the stud 411 and the sliding frame 408 lose their corresponding constraints, they are quickly pushed by the high-pressure gas inside the telescopic sleeve 401 and slide along the transverse groove 403 towards the inner side of the installation sleeve 3. The telescopic sleeve 401 is extended, and the internal air pressure decreases rapidly. When the sliding frame 408 moves to the end of the installation sleeve 3, the telescopic airbag 412 provides buffering to prevent the sliding frame 408 from violently hitting the inner wall of the installation sleeve 3.

[0061] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0062] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-pressure flange air tightness detection device, comprising a base (1), a support frame (2) being arranged on one side of an upper end surface of the base (1), characterized in that: The support frame (2) is provided with a mounting sleeve (3), the inner side of the mounting sleeve (3) is provided with a pressure mechanism (4) for increasing air pressure, the opening of the mounting sleeve (3) is provided with a positioning assembly (5) for fixing the flange, and a sealing mechanism (6) is movably provided on a side of the upper end surface of the base (1) away from the support frame (2), the sealing mechanism (6) is used to control the pressing force of the flange connection part, and the sealing mechanism (6) is also provided with a controller (7) and an air pressure sensor (8); The pressure mechanism (4) comprises: A telescopic sleeve (401), the telescopic sleeve (401) being movably arranged at the end of the mounting sleeve (3) and the sleeve opening of the telescopic sleeve (401) being arranged outside the opening of the mounting sleeve (3), the telescopic sleeve (401) being provided with a connecting plate (402) at the inner end of the mounting sleeve (3), a plurality of transverse grooves (403) being provided on the inner wall of the mounting sleeve (3), and the outer side of the connecting plate (402) being slidably connected in the transverse groove (403) by providing a sliding block; A mounting groove (404), the mounting groove (404) being horizontally opened on the inner wall of the mounting sleeve (3) and spaced apart from the transverse groove (403), a circular arc-shaped threaded sliding piece (405) being movably arranged in the mounting groove (404), the center of the cross section of the threaded sliding piece (405) being at the same point, an electromagnetic piece (406) being arranged on the outer side of the mounting groove (404) on the main body of the mounting sleeve (3), and a permanent magnetic piece (407) matching the electromagnetic piece (406) being embedded in the threaded sliding piece (405); A sliding frame (408), wherein the sliding frame (408) is slidably connected in the transverse groove (403), a driving motor (409) is arranged inside the sliding frame (408), an output end of the driving motor (409) is connected to a reducer (410), an end of the reducer (410) is connected to a stud (411), the other end of the stud (411) is rotatably connected to the connecting plate (402), and an external thread of the stud (411) matches an internal thread on the threaded slide (405); A telescopic airbag (412) is arranged at an end of the mounting sleeve (3) and located on one side of the sliding frame (408).

2. The high-pressure flange air tightness detection device according to claim 1, characterized in that: The sealing mechanism (6) comprises: A support seat (601), the support seat (601) being movably arranged on the upper end surface of the base (1), a mounting cavity (602) being provided at the upper end of the support seat (601), and an electromagnetic disk (603) being provided inside the mounting cavity (602); A sliding sleeve (604), wherein the sliding sleeve (604) is slidably connected in the installation cavity (602), a permanent magnetic disk (605) matching the electromagnetic magnetic disk (603) is embedded in the interior of the sliding sleeve (604), a sealing rubber seat (606) is arranged on the end surface of the permanent magnetic disk (605) in the sliding sleeve (604), and the air pressure sensor (8) is arranged on the end surface of the sealing rubber seat (606); An air intake pipe (607), wherein an end of the air intake pipe (607) sequentially passes through the through holes on the support seat (601), the electromagnetic disk (603), the sliding sleeve (604), the permanent disk (605) and the sealant seat (606) and is fixedly connected to an end surface of the sealant seat (606).

3. The high-pressure flange air tightness detection device according to claim 2, characterized in that: The positioning component (5) comprises: An extension part (501), the extension part (501) being arranged on the outer wall of the end of the mounting sleeve (3), a plurality of positioning holes (502) being arranged on the end surface of the extension part (501) adjacent to the support seat (601), a connecting cross bar (503) being slidably connected in the positioning hole (502), and a hexagonal part (504) being arranged on the rod body of the connecting cross bar (503) for rotation of the main body of the connecting cross bar (503); A clamping ring (505), the clamping ring (505) being movably arranged on one side of the extension portion (501), a plurality of internal thread sleeves (506) being provided on the end surface of the clamping ring (505), the internal thread sleeves (506) being threadedly connected to the end of the connecting cross bar (503), and the diameter of the internal thread sleeves (506) matching the bolt holes on the flange; A thick sealing ring (507) is movably arranged on the inner side of the clamp ring (505), and the thick sealing ring (507) is used for sealing during flange sealing surface inspection.

4. The high-pressure flange air tightness detection device according to claim 3 is characterized in that: A rubber pad (9) is bonded to the end surface of the clamping ring (505) located on one side of the internal threaded sleeve (506) to protect the stress-bearing part of the flange.

5. The high-pressure flange air tightness detection device according to claim 3, characterized in that: The inner diameter of the opening of the support seat (601) is greater than the outer diameter of the clamp ring (505).

6. The high-pressure flange air tightness detection device according to claim 2, characterized in that: The controller (7) is mounted on the side wall at the lower end of the support seat (601), and the controller (7) is electrically connected to the electromagnetic sheet (406), the drive motor (409), the electromagnetic disk (603) and the air pressure sensor (8) respectively through wires.

7. The high-pressure flange air tightness detection device according to claim 1, characterized in that: The telescopic sleeve (401) and the telescopic airbag (412) are both made of rubber material and are in the shape of a bellows.

8. The high-pressure flange air tightness detection device according to claim 1, characterized in that: The transverse groove (403) crosses the entire inner wall of the installation sleeve (3).

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