High-pressure flange air tightness detection device

Abstract

The high-pressure flange airtightness detection device comprises a base, a supporting frame is arranged on one side of the upper end face of the base, a mounting sleeve is arranged in the supporting frame, a pressure mechanism used for increasing the pressure is arranged on the inner side of the mounting sleeve, and a positioning assembly used for fixing a flange is arranged at an opening of the mounting sleeve. A sealing mechanism is movably arranged on the side, away from the supporting frame, of the upper end face of the base, the sealing mechanism is used for controlling the pressing force of the flange connecting part, and a controller and an air pressure sensor are further arranged on the sealing mechanism. The pressure relief device is simple in structure and reasonable in design, the whole operation process is simple, convenient and fast, the pressure relief efficiency of the flange when the air pressure is abnormal is remarkably improved, explosion is effectively avoided, gas is not exhausted in the telescopic sleeve in the pressure relief process, the situation that high-pressure gas hurts workers in the pressure relief process is avoided, and the safety of the workers is improved. And the safety of the air tightness detection equipment is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of sealing detection equipment, in particular to a high-pressure flange air tightness detection device. Background Art

[0002] With the continuous advancement of industrial technology, high-pressure gas pipelines have been widely used in many fields such as petroleum, chemical industry, and natural gas. In these systems, flanges, especially high-pressure flanges, are key components for connecting pipelines, and their air tightness is directly related to the safety and stability of the entire system. Therefore, strict air tightness testing of high-pressure flanges is an important part of ensuring the safe operation of the system. At present, the commonly used high-pressure flange air tightness testing method on the market is mainly to inject high-pressure gas into the inner side of the sealed flange through pressure equipment and observe the pressure maintenance, so as to draw conclusions related to the sealing.

[0003] The traditional device has the following shortcomings: In the prior art, although the air pressure test can effectively evaluate the air tightness of the flange, this detection method faces huge safety hazards when facing the quality problems that may exist in the flange itself, especially the material defects caused by unqualified heat treatment. When the flange fails to meet the specified strength and toughness standards during the heat treatment process, it is very easy to burst during the pressurization process. This bursting will not only cause equipment damage and production line interruption, but may also cause serious safety accidents, causing immeasurable harm to personnel and the environment. The existing air tightness detection equipment has a certain degree of protection function. Since the flange will first crack before bursting, the crack will cause the air pressure inside the flange to rise slowly or even decrease. The equipment will respond quickly when the air pressure is detected to be abnormal, and the system pressure will be reduced by stopping the pressure or opening the solenoid valve to exhaust the air outward. However, this type of equipment still has obvious shortcomings in dealing with the risk of high-pressure flange bursting. Specifically, due to the caliber limitation of the exhaust hole, when the equipment detects the abnormal air pressure during the pressurization process and implements the pressure reduction measures, it often takes a long time to complete the pressure release, while the process from the abnormal air pressure to the actual bursting of the flange may be very short. This time mismatch makes it difficult for the existing pressure reduction method to effectively prevent the flange from bursting before it explodes, and the high-pressure gas release process is likely to cause harm to nearby workers, thus failing to meet the current high standards for explosion-proof performance of air tightness testing equipment in the industrial field. Summary of the invention

[0004] The purpose of the present invention is to provide a high-pressure flange air tightness detection device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: 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 inside the support frame, a pressure mechanism for increasing air pressure is arranged on the inner side of the mounting sleeve, a positioning assembly for fixing the flange is arranged at the opening of the mounting sleeve, a sealing mechanism is movably arranged on one side of the upper end surface of the base away from the support frame, the sealing mechanism is used to control the pressing force of the flange connection part, and a controller and an air pressure sensor are also arranged on the sealing mechanism; The pressure mechanism comprises: A telescopic sleeve, wherein the telescopic sleeve is movably arranged at the end of the mounting sleeve and the sleeve opening of the telescopic sleeve is arranged outside the opening of the mounting sleeve, the telescopic sleeve is provided with a connecting plate at the inner end of the mounting sleeve, a plurality of transverse grooves are provided on the inner wall of the mounting sleeve, and the outer side of the connecting plate is slidably connected in the transverse groove by providing a slider; A mounting groove, the mounting groove is horizontally opened on the inner wall of the mounting sleeve and is spaced apart from the transverse groove, a circular arc-shaped threaded sliding piece is movably arranged in the mounting groove, the center of the cross section of the threaded sliding piece is at the same point, an electromagnetic piece is arranged on the outer side of the mounting groove on the mounting sleeve body, and a permanent magnetic piece matching the electromagnetic piece is embedded in the threaded sliding piece; A sliding frame, wherein the sliding frame is slidably connected in the transverse groove, a driving motor is arranged inside the sliding frame, an output end of the driving motor is connected to a reducer, an end of the reducer is connected to a stud, the other end of the stud is rotatably connected to the connecting plate, and the external thread of the stud matches the internal thread on the threaded slide; The telescopic airbag is arranged at the end of the mounting sleeve and located on one side of the sliding frame.

[0006] Preferably, the sealing mechanism comprises: A support seat, wherein the support seat is movably arranged on the upper end surface of the base, an installation cavity is opened at the upper end of the support seat, and an electromagnetic disk is arranged inside the installation cavity; A sliding sleeve, wherein the sliding sleeve is slidably connected in the installation cavity, a permanent magnetic disk matching the electromagnetic disk is embedded in the sliding sleeve, a sealing rubber seat is arranged on the end surface of the permanent magnetic disk in the sliding sleeve, and the air pressure sensor is arranged on the end surface of the sealing rubber seat; The end of the air intake pipe sequentially passes through the support seat, the electromagnetic disk, the sliding sleeve, the permanent disk and the through hole on the sealant seat and is fixedly connected to the end surface of the sealant seat.

[0007] Preferably, the positioning component includes: An extension part, the extension part is arranged on the outer wall of the end of the mounting sleeve, a plurality of positioning holes are arranged on the end surface of the extension part adjacent to the support seat, a connecting cross bar is slidably connected in the positioning hole, and a hexagonal part is arranged on the rod body of the connecting cross bar for connecting the rotation of the cross bar body; A clamping ring is movably arranged on one side of the expansion portion, and a plurality of internal threaded sleeves are provided on the end surface of the clamping ring. The internal threaded sleeves are threadedly connected to the end of the connecting cross bar, and the diameter of the internal threaded sleeves matches the bolt holes on the flange.

[0008] A thick sealing ring is movably arranged on the inner side of the clamp ring and is used for sealing during flange sealing surface inspection.

[0009] Preferably, a rubber pad is bonded to the end surface of the clamping ring on one side of the internal threaded sleeve to protect the stress-bearing part of the flange.

[0010] Preferably, the inner diameter of the opening of the support seat is larger than the outer diameter of the clamp ring.

[0011] Preferably, the controller is mounted on the side wall of the lower end of the support seat, and the controller is electrically connected to the electromagnetic sheet, the drive motor, the electromagnetic disk and the air pressure sensor respectively through wires.

[0012] Preferably, the telescopic sleeve and the telescopic airbag are both made of rubber material and are in a bellows shape.

[0013] Preferably, the transverse groove crosses the entire inner wall of the mounting sleeve.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention is provided with a pressure mechanism, and utilizes the extrusion expansion sleeve to achieve the pressurization effect in the flange. When the air pressure abnormality is detected, the threaded slide is quickly retracted into the installation groove, and the end of the expansion sleeve loses the horizontal constraint and is instantly extended, and the air pressure inside the flange is also instantly reduced. The whole operation process is simple and convenient, which significantly improves the pressure relief efficiency of the flange when the air pressure is abnormal, and effectively avoids the occurrence of explosion. In addition, since the gas is still in the expansion sleeve and is not discharged during the pressure reduction process, it is avoided that the high-pressure gas causes harm to the staff during the pressure relief process, and the safety of the air tightness detection equipment is ensured. At the same time, the pressurization by pushing the expansion sleeve also significantly improves the sealing performance of the equipment itself, and the installation sleeve is arranged on the outside of the expansion sleeve and the expansion airbag to prevent their radial deformation, which also significantly improves the pressure bearing limit of the expansion sleeve and the expansion airbag. The present invention is provided with a sealing mechanism, so that when the flange is tested for air tightness, the flange sealing clamping force can be precisely controlled by adjusting the current on the electromagnetic disk, so that the entire flange testing process can be carried out according to the actual clamping effect of the bolt under normal working conditions, avoiding excessive or insufficient clamping pressure, and further improving the accuracy and reliability of the test results. The present invention realizes the pre-positioning and sealing of the single-side flange and the telescopic sleeve at the port of the mounting sleeve by providing a positioning component. The sealing effect of the telescopic sleeve is only controlled by the connecting cross bar and is not affected by the clamping force of the sealing mechanism. The detection result is more controllable. The sealing mechanism can dock the other side flange with the bolt according to the size of the bolt clamping force under actual working conditions. The operation process of the sealing mechanism is simplified and the sealing efficiency is improved. In addition, such a fixing method avoids damage to the flange during the detection process, which affects the secondary sales. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an overall stereogram of the present invention; Figure 2 It is the overall front view of the present invention; Figure 3 It is a schematic diagram of the internal structure of the present invention; Figure 4 For the present invention Figure 3 An enlarged schematic diagram at A in FIG. Figure 5 For the present invention Figure 3 The enlarged schematic diagram at B in FIG. Figure 6 It is a schematic diagram of the internal structure of the mounting sleeve and the supporting base of the present invention; Figure 7 It is a schematic diagram of stud installation of the present invention; Figure 8 It is a schematic side view of the internal structure of the installation sleeve of the present invention; Fig. 9 It is a schematic diagram of the connection between the sliding frame and the transverse groove of the present invention; Fig.10 It is a schematic diagram of flange compression of the present invention; Fig.11 It is a stereoscopic schematic diagram of the telescopic sleeve and the telescopic airbag of the present invention.

[0016] 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 slide; 406, electromagnetic sheet; 407, permanent magnet sheet; 408, sliding frame; 409, driving motor; 410, reducer; 411, stud; 412, telescopic airbag; 5, positioning assembly; 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, installation cavity; 603, electromagnetic disk; 604, sliding sleeve; 605, permanent disk; 606, sealant seat; 607, intake pipe; 7, controller; 8, air pressure sensor; 9, rubber pad; 10, A flange; 11, B flange. DETAILED DESCRIPTION

[0017] 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 is further described in detail below in conjunction with 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 intended to limit the present invention.

[0018] It should be noted that when an element is referred to as being "fixed", "mounted", "connected" or "disposed" with another element, it may be directly on the other element or indirectly on the other element. It should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation in the specification, and therefore cannot be understood as limiting the present invention.

[0019] As a further improvement of the present invention, the terms "first", "second", "third", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0020] See also Figure 1-11As shown, the present invention provides a technical solution for a high-pressure flange air tightness detection device: a high-pressure flange air tightness detection device, comprising a base 1, a support frame 2 is fixedly installed on one side of the upper end surface of the base 1, a mounting sleeve 3 is fixedly installed inside the support frame 2, a pressure mechanism 4 for increasing air pressure when performing air tightness detection is installed on the inner side of the mounting sleeve 3, the flange must have mutually adapted A flange 10 and B flange 11 to simulate sealing when performing air tightness detection, a positioning component 5 for fixing the A flange 10 is installed at the opening of the mounting sleeve 3, a sealing mechanism 6 is movably installed on one 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 a controller 7 and an air pressure sensor 8 are also installed on the sealing mechanism 6; The pressure mechanism 4 includes a telescopic sleeve 401, a mounting groove 404, a sliding frame 408 and a telescopic airbag 412. The telescopic sleeve 401 is movably mounted on the end of the mounting sleeve 3 and the sleeve opening of the telescopic sleeve 401 is sleeved on the outside of the opening of the mounting sleeve 3. The inner end of the telescopic sleeve 401 located at the mounting sleeve 3 is fixedly connected with a connecting plate 402. A plurality of transverse grooves 403 are provided on the inner wall of the mounting sleeve 3. The outer side of the connecting plate 402 is slidably connected in the transverse groove 403 by providing a slider. The mounting groove 404 is horizontally provided on the inner wall of the mounting sleeve 3 and is spaced apart from the transverse groove 403. A circular arc-shaped threaded slide 405 is movably installed in the mounting groove 404. The threaded slide 405 slides along the groove in the mounting groove 404. The center of the cross section of the threaded slide 405 is at the same point. An electromagnetic sheet 406 is installed on the outer side of the mounting groove 404 on the main body of the mounting sleeve 3. A permanent magnetic sheet 407 matching the electromagnetic sheet 406 is embedded and installed in the threaded slide 405. The sliding frame 408 is slidably connected in the horizontal groove 403 through a slider, and a driving motor 409 is installed inside the sliding frame 408. The driving motor 409 can be a DC brushless motor. The output end of the driving motor 409 is connected to a reducer 410, and the end of the reducer 410 is connected to a stud 411. The other end of the stud 411 is rotatably connected to the connecting disk 402, and the external thread of the stud 411 matches the internal thread on the threaded slide 405.

[0021] After the electromagnetic sheet 406 is energized, a repulsive force is generated on the permanent magnet sheet 407, so that the threaded slide 405 extends out of the installation slot 404 and the internal thread on the inner side thereof meshes with the external thread of the stud 411. Under the limiting action of the slider and the transverse slot 403, the sliding frame 408 can only move horizontally along the inner wall of the installation sleeve 3 and cannot rotate. Therefore, the driving motor 409 drives the stud 411 to rotate relative to the threaded slide 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 mounted on the end of the installation sleeve 3 on one side of the sliding frame 408. When the sliding frame 408 moves rapidly toward the telescopic airbag 412, the telescopic airbag 412 can provide sufficient support and buffering. The pressure limit of the telescopic airbag 412 should be greater than the pressure limit of the telescopic sleeve 401.

[0022] When the air tightness detection device needs to be pressurized, the telescopic sleeve 401, the stud 411 and the sliding frame 408 are first moved to the appropriate position, and then the electromagnetic sheet 406 is energized to apply sufficient thrust to the permanent magnetic sheet 407 until the threaded slide 405 is stably engaged with the stud 411. Then the drive motor 409 is started, and the drive motor 409 drives the stud 411 to rotate through the reducer 410. The stud 411 moves toward the telescopic sleeve 401 under the action of the threaded slide 405, compressing the telescopic sleeve 401 until the specified air pressure is reached in the telescopic sleeve 401. The drive motor 409 is controlled to be closed through the controller 7. Under the self-locking action of the drive motor 409, the telescopic sleeve 401 and the sliding frame 408 are both in a stable state, and the inside of the telescopic sleeve 401 is kept pressurized. If the controller 7 detects that the internal air pressure of the flange is abnormal and there is a risk of explosion during the rotation and pressurization of the driving motor 409 and the stud 411, the controller 7 will quickly control the electromagnetic sheet 406 to change the direction of the current passing through, thereby generating an attraction force on the permanent magnet sheet 407, and the threaded slide 405 will be retracted into the installation slot 404 and separated from the stud 411. At this time, the stud 411 and the sliding frame 408 lose the corresponding constraints and slide backward rapidly under the push of the high-pressure gas in the telescopic sleeve 401, so that the telescopic sleeve 401 can be extended, and the internal air pressure will be rapidly reduced. When the sliding frame 408 moves to the end of the installation sleeve 3, the telescopic airbag 412 provides a buffer to prevent the sliding frame 408 from violently colliding with the inner wall of the installation sleeve 3.

[0023] Through the pressure mechanism 4, the pressurization effect in the flange is achieved by squeezing the telescopic sleeve 401. When abnormal air pressure is detected, the threaded slide 405 is quickly retracted into the installation groove 404, and the end of the telescopic sleeve 401 loses horizontal constraint and is able to stretch instantly, and the air pressure inside the flange is also able to be reduced instantly. The whole process is simple and convenient, which significantly improves the pressure relief efficiency of the flange when the air pressure is abnormal, and effectively avoids the occurrence of explosion. In addition, since the gas is still in the telescopic sleeve 401 and is not discharged during the pressure reduction process, the high-pressure gas is prevented from causing harm to the staff during the pressure relief process, thereby ensuring the safety of the air tightness detection equipment. At the same time, the sealing performance of the equipment itself is also significantly improved by pressing the telescopic sleeve 401. The installation sleeve 3 is arranged on the outside of the telescopic sleeve 401 and the telescopic airbag 412 to prevent radial deformation, which also significantly improves the pressure bearing limit of the two.

[0024] The sealing mechanism 6 includes a support seat 601, a sleeve 604 and an air inlet pipe 607. The support seat 601 is movably mounted in a slide rail on the upper end surface of the base 1. The support seat 601 slides and is positioned on the upper end surface of the base 1 along the slide rail. An installation cavity 602 is provided at the upper end of the support seat 601, and an electromagnetic disk 603 is fixedly installed inside the installation cavity 602. The sleeve 604 is slidably connected in the installation cavity 602. A permanent magnetic disk 605 matching the electromagnetic disk 603 is embedded inside the sleeve 604. The sleeve 604 moves horizontally along the installation cavity 602 under the cooperation of the attraction and repulsion of the permanent magnetic disk 605 and the electromagnetic disk 603. A sealant seat 606 is bonded on the end surface of the permanent magnetic disk 605 in the sleeve 604. The air pressure sensor 8 is installed on the end surface of the sealant seat 606 to detect the real-time air pressure inside the flange. The end of the air inlet pipe 607 passes through the through holes on the support seat 601, the electromagnetic disk 603, the sliding sleeve 604, the permanent magnetic disk 605 and the sealant seat 606 in sequence and is fixedly connected to the end face of the sealant seat 606 for preliminarily adjusting the air pressure inside the flange before pressing.

[0025] When the equipment needs to perform air tightness test on the flange, the support seat 601 needs to be moved along the track on the base 1 to the side away from the installation sleeve 3 to leave enough operating space, and then the B flange 11 is put on the sealant seat 606, located on the inner side of the sliding sleeve 604. After the A flange 10 is positioned, the support seat 601 can be moved to the specified position in the direction of the installation sleeve 3 to adjust the distance between the A flange 10 and the B flange 11. At this time, the controller 7 controls the current of the specified direction and magnitude to be passed to the electromagnetic disk 603, so that the electromagnetic disk 603 generates a constant repulsive force on the permanent disk 605, and the magnitude of the repulsive force is consistent with the clamping force applied by the A flange 10 and the B flange 11 when the bolts are tightened. At this time, the A flange 10 and the B flange 11 are pressed tightly, and a pressure test can be performed. When the magnitude of the clamping force needs to be adjusted, the current magnitude of the electromagnetic disk 603 can be adjusted.

[0026] Through the sealing mechanism 6, the flange sealing clamping force can be precisely controlled by adjusting the current on the electromagnetic disk 603 when the flange is tested for air tightness, so that the entire flange testing process can be carried out according to normal working conditions to simulate the actual clamping effect of the bolt, avoiding excessive or insufficient pressure, and further improving the accuracy and reliability of the test results.

[0027] The positioning assembly 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 installation sleeve 3. A plurality of positioning holes 502 are provided on the end surface of the extension part 501 adjacent to the support seat 601. A connecting crossbar 503 is slidably connected in the positioning hole 502. A hexagonal portion 504 is integrally formed on the rod body of the connecting crossbar 503 for the rotation of the main body of the connecting crossbar 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 surface of the clamping ring 505. The internal thread sleeve 506 is threadedly connected to the end of the connecting crossbar 503. The diameter of the internal thread sleeve 506 matches the bolt hole on the flange. The A flange 10 is hung on the internal thread sleeve 506 through the bolt hole. A rubber pad 9 is bonded to the end surface of the clamping ring 505 located on one side of the internal thread sleeve 506 for protecting the stress-bearing part of the flange. The thick sealing ring 507 is movably mounted on the inner side of the clamp ring 505 and can be flexibly disassembled. The thick sealing ring 507 is used for sealing during flange sealing surface inspection.

[0028] When the A flange 10 needs to be fixed, first rotate the connecting cross bar 503 by twisting the hexagonal portion 504 to remove the clamp ring 505, then hang the corresponding A flange 10 on the internal thread sleeve 506 of the clamp ring 505 through its own bolt hole, and then re-connect the clamp ring 505 to the connecting cross bar 503 through the internal thread sleeve 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 telescopic sleeve 401 sleeve and the end face of the A flange 10 and the port of the installation sleeve 3. Finally, the thick sealing ring 507 is placed on the sealing surface of the clamp ring 505 and the A flange 10. When the A flange 10 is connected to the B flange 11 sealing surface, the thick sealing ring 507 can ensure effective fit with the sealing surfaces of the flanges on both sides.

[0029] Through the positioning component 5, the single-side flange and the telescopic sleeve 401 are pre-positioned and sealed at the port of the installation sleeve 3. The sealing effect of the telescopic sleeve 401 is only controlled by the connecting cross bar 503 and is not affected by the clamping force of the sealing mechanism 6. The detection result is more controllable. The sealing mechanism 6 can dock the other side flange with it according to the size of the bolt clamping force under actual working conditions. The operation process of the sealing mechanism 6 is simplified and the sealing efficiency is improved. In addition, this fixing method also avoids damage to the flange during the detection process, which affects the secondary sales.

[0030] In the actual detection process, the opening of the support seat 601 should be sleeved on the outside of the clamp ring 505, so the inner diameter of the opening of the support seat 601 is larger than the outer diameter of the clamp ring 505 to avoid mutual interference.

[0031] The controller 7 is installed on the side wall of the lower end of the support base 601. The controller 7 is electrically connected to the electromagnetic plate 406, the drive motor 409, the electromagnetic disk 603 and the air pressure sensor 8 through wires. After receiving the electrical signal from the air pressure sensor 8, the controller 7 controls the electromagnetic plate 406, the drive motor 409 and the electromagnetic disk 603 through wires to ensure the stable operation of the equipment.

[0032] The telescopic sleeve 401 and the telescopic airbag 412 are both made of rubber material and are in the shape of a bellows. The bellows shape is conducive to more precise control of the telescopic profile and path.

[0033] The transverse groove 403 crosses the entire inner wall of the installation sleeve 3. The 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 pressing limit and buffering capacity.

[0034] Working principle: When using the present invention to test the air tightness of the flange, first move the support seat 601 along the track on the base 1 to the side away from the installation sleeve 3 to leave enough operating space, then remove the clamp ring 505, and then hang the corresponding A flange 10 on the internal threaded sleeve 506 of the clamp ring 505 through its own bolt hole, and then re-connect the clamp ring 505 to the connecting cross bar 503 through the internal threaded sleeve 506, and tighten the connecting cross bar 503 to ensure that the two sides of the telescopic sleeve 401 sleeve mouth are tightly fitted with the end face of the A flange 10 and the port of the installation sleeve 3. Finally, place the thick sealing ring 507 on the sealing surface of the clamp ring 505 and the A flange 10. At this time, the flange can be sealed. Put the B flange 11 on the sealant seat 606, and move the support seat 601 to the specified position in the direction of the installation sleeve 3, adjust the distance between the A flange 10 and the B flange 11, and then fix the support seat 601. At this time, the controller 7 controls the current of 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 disk 605, which is used to simulate the clamping force applied to the flanges on both sides when the bolts are tightened under normal working conditions. At this time, the air pressure inside the flange is preliminarily adjusted through the air inlet pipe 607, so that the sliding frame 408, stud 411, etc. are all in the accurate position before the air tightness test can be carried out.

[0035] First, the controller 7 controls the electromagnetic sheet 406 to be energized to generate a repulsive force on the permanent magnetic sheet 407, so that the threaded slide 405 and the stud 411 are stably engaged. Then, the drive motor 409 is started, and the drive motor 409 drives the stud 411 to rotate. The stud 411 compresses the telescopic sleeve 401 under the action of the threaded slide 405 until the specified air pressure is reached in the telescopic sleeve 401. The controller 7 is triggered by the air pressure sensor 8 and then controls the drive motor 409 to close. Under the self-locking action of the drive motor 409, the telescopic sleeve 401 and the sliding frame 408 are both in a stable state, and the inside of the telescopic sleeve 401 is kept under pressure. If the controller 7 detects that the air pressure inside the flange is abnormal through the air pressure sensor 8 during the rotation and pressurization of the drive motor 409 and the stud 411, and there is a risk of explosion, the controller 7 quickly controls the electromagnetic sheet 406 to change the direction of the current passing through, thereby generating an attractive force on the permanent magnetic sheet 407, and the threaded slide 405 instantly shrinks into the installation slot 404 and separates from the stud 411. At this time, the stud 411 and the sliding frame 408 lose their corresponding constraints and slide rapidly along the transverse groove 403 toward the inner side of the installation sleeve 3 under the push of the high-pressure gas in the telescopic sleeve 401, so that 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 a buffer to prevent the sliding frame 408 from colliding violently with the inner wall of the installation sleeve 3.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that 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).

Images