CN114778032A

CN114778032A - Sealing structure and detection method of pressure container air tightness detection device

Info

Publication number: CN114778032A
Application number: CN202210232211.2A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Jiushu Machinery Co ltd
Current assignee: Zhejiang Jiushu Machinery Co ltd
Priority date: 2022-03-09
Filing date: 2022-03-09
Publication date: 2022-07-22

Abstract

The invention discloses pressure vessel air tightness detection equipment, and particularly relates to a sealing structure and a detection method of a pressure vessel air tightness detection device. Meanwhile, the front end of the front supporting seat is provided with a movable front seat body, the front seat body is provided with an air inlet connected with an air inlet nozzle at the front end of the pressure container and an air outlet connected with an air outlet nozzle, and compressed air or nitrogen and hydrogen gas is introduced into the pressure container so as to detect the sealing performance of the pressure container. The air inlet is provided with an opening structure which can enable the connecting pipe to be embedded, the inner wall of the opening structure is provided with a groove, and a sealing ring is embedded in the groove. The rear supporting seat is provided with an annular sealing cavity covering the welding position of the pressure container, and meanwhile, the rear supporting seat is provided with an air suction port communicated with the annular sealing cavity and an air overflow port through which air can enter the annular sealing cavity from the outside in one way.

Description

Sealing structure and detection method of pressure container air tightness detection device

Technical Field

The invention belongs to the technical field of pressure container air tightness detection, and particularly relates to a sealing structure and a detection method of a pressure container air tightness detection device.

Background

Pressure vessels are often used to contain high temperature, high pressure, toxic or corrosive fluids, and therefore the gas tightness of the pressure vessel is critical to the safety of the pressure vessel.

The Chinese patent with application number 201611016104.7 discloses a high-pressure container air tightness detection device, which comprises a frame, a sealing mechanism, an air inlet control mechanism and an air compressor; control mechanism admits air is including admitting air the person in charge, first air inlet branch pipe, the second air inlet branch pipe, the pressure control valve, switching-over valve and sound device, the both ends of the person in charge of admitting air respectively with the access connection of air compressor machine and switching-over valve, be equipped with first air flue in the upper seal lid, be equipped with the second air flue in the lower seal lid, the one end of first air inlet branch pipe and second air inlet branch pipe communicates with the one end of first air flue and second air flue respectively, the switching-over valve is equipped with two exports of being connected with the other end of first air inlet branch pipe and second air inlet branch pipe respectively, the pressure control valve is connected in main intake pipe, sound device sets up at the up end of lower seal lid and communicates with the second air flue.

The Chinese patent with application number 201110141510.7 discloses a pressure vessel airtightness experimental device and method, which consists of a gas compressor, a gas-driven pump, a high-pressure gas storage tank, a low-pressure gas storage tank and more than two tested vessels, wherein the tested vessels are respectively provided with respective pressure indicating devices, a pipeline with a gas inlet valve is respectively arranged on a gas inlet of each tested vessel, a pipeline with a two-way valve is respectively arranged on a gas inlet and a gas outlet of each tested vessel, the high-pressure gas storage tank is communicated with the low-pressure gas storage tank and a plurality of tested vessels through pipelines, the tested vessels which are pressure-maintaining are completed divide the gas therein to the vessels which are not tested and then to the low-pressure gas storage tank; the outlet pipeline of the low-pressure gas storage tank is provided with a gas drive pump, and the outlet pipeline of the low-pressure gas storage tank with the gas drive pump is communicated with the air inlet pipeline of the high-pressure gas storage tank.

In the existing pressure vessel airtightness detection equipment, a tested pressure vessel is often required to be communicated through an air inlet pipeline, and meanwhile, a part of the pressure vessel, which needs to be subjected to airtightness testing, is required to be covered and sealed through an upper sealing cover and a lower sealing cover, so that the accuracy of airtightness testing is directly influenced on the quality of the sealing performance of an air inlet connector and the part subjected to airtightness testing.

Disclosure of Invention

The invention aims to provide a sealing structure of a pressure container air tightness detection device with good sealing performance in order to solve the technical problems.

The purpose of the invention is realized by the following steps: the utility model provides an airtight performance check out test set is made to pressure vessel, includes preceding supporting seat and back supporting seat, and preceding supporting seat and back supporting seat are used for supporting pressure vessel. Meanwhile, the front end of the front supporting seat is provided with a movable front seat body, the front seat body is provided with an air inlet connected with an air inlet nozzle at the front end of the pressure container and an air outlet connected with an air outlet nozzle, and the connecting pipes are connected with the air inlet nozzle and the air inlet and the air outlet nozzle and the air outlet. Be equipped with the open structure that can make the connecting pipe embedding on the air inlet, be equipped with the recess on open structure's the inner wall, the embedding has the sealing washer in the recess, and when connecting pipe embedding open structure was connected with the air inlet, thereby the outer wall of connecting pipe contradicts with the sealing washer and extrudees the sealing washer, can improve the air inlet and the sealing performance who is connected with the suction nozzle. The sealing washer comprises a plurality of lamella rings, and the lamella ring is radial arrangement, and the diameter of lamella ring reduces to both sides from the centre gradually, makes the laminating connecting pipe that the sealing washer can be better, further guarantees sealing performance.

Furthermore, an annular sealing cavity covering the welding position of the pressure container is arranged on the rear supporting seat, and an air suction port communicated with the annular sealing cavity and an air overflow port through which air can enter the annular sealing cavity from the outside in one way are arranged on the rear supporting seat. The annular sealing cavity is provided with a deformation mechanism, and the diameter of the annular sealing cavity can be changed, so that the annular sealing cavity can be adapted to pressure containers with different diameters, and the universality is improved. The deformation mechanism is provided with the sealing mechanism, so that the deformation mechanism can be sealed, and the sealing performance of a welding seam to be tested of the pressure container is ensured. The rear end of the rear supporting seat is provided with a rear seat body which supports against the rear part of the pressure vessel, and the stability of fixing the pressure vessel can be ensured. Simultaneously, a pressure sensor is arranged at the air outlet of the front seat body, the air inlet is connected with an electromagnetic valve, the electromagnetic valve is connected with a nitrogen hydrogen gas inlet pipe and a compressed air inlet pipe, and the nitrogen hydrogen gas inlet pipe or the compressed air inlet pipe can be in control connection through the electromagnetic valve.

Among this technical scheme, back supporting seat is mobilizable annular structure, can adjust the position of annular seal chamber through the removal of back supporting seat to can conveniently make annular seal chamber cover its welded joint to the pressure vessel of difference. The deformation mechanism comprises a plurality of structural sheets arranged on two sides of the rear supporting seat, and the structural sheets on the two sides and the rear supporting seat jointly form an annular sealing cavity. The structural sheets on one side are arranged in a ring shape. And meanwhile, a plurality of sliding grooves which correspond to the structural sheets one by one are formed in the rear supporting seat, and guide columns are arranged on the structural sheets and can be embedded into the sliding grooves to enable the structural sheets to move on the sliding grooves. Be provided with actuating mechanism on the structure piece, can drive the structure piece through actuating mechanism and remove on the spout, the one end at support seat center is the acute angle behind the structure piece orientation, constitutes nearly circular structure through the one end at a plurality of structure pieces orientation support seat centers with one side, can adjust the diameter of nearly circular structure through the synchronous motion of structure piece to adjust the diameter in annular seal chamber.

Furthermore, the driving mechanism comprises a rotary disc arranged on the structural sheet, the rotary disc is of an annular structure, a plurality of driving grooves in one-to-one correspondence with the structural sheet are arranged on the rotary disc, and the driving grooves are of arc-shaped structures. Meanwhile, the driving column capable of being embedded into the driving groove is arranged on the structural piece, the driving column can move in the driving groove, one end of the driving groove can abut against the driving column through rotation of the driving groove, and the driving column drives the structural groove to move. Be provided with a plurality of driving teeth on the outward flange of carousel and make the outward flange of carousel constitute gear column structure, be provided with driving motor on the back supporting seat, driving motor is connected with drive gear, the gear column structure meshing that the outward flange of drive gear and carousel constitutes to the drive carousel rotates and drives the structure piece and removes, adjusts the diameter in annular sealed chamber.

Among this technical scheme, be provided with the sealing mechanism who is used for sealed annular seal chamber on the back supporting seat, sealing mechanism is including setting up the support frame of the loop configuration on the back supporting seat, and rotatable being connected with the backup pad that a plurality of annular equidistance set up on the support frame. Meanwhile, a driving ring is arranged on the outer side of the supporting frame in a surrounding mode, an inclined groove is formed in the supporting frame, a transmission rod is arranged in the inclined groove, the transmission rod penetrates through one end of the inclined groove and is hinged to the supporting plate, and the other end of the transmission rod is hinged to the driving ring. The driving ring is connected with a push rod, and the push rod pushes the driving ring to move.

Furthermore, the supporting plates are of fan-shaped structures and can rotate towards the centers of the supporting rings, the adjacent supporting plates are closely arranged, one side, facing the centers of the supporting rings, of each supporting plate is enclosed into a circular structure, and each supporting plate is connected with an elastic sealing sleeve. Thereby can make the elastic sealing cover expand or contract through the synchronous rotation of each backup pad to can guarantee the surface laminating of elastic sealing cover and pressure vessel when to different diameter pressure vessels, thereby guarantee sealing performance.

Among this technical scheme, be provided with the first fixed knot who is used for fixed elastic sealing cover on the back supporting seat and construct, first fixed knot constructs including setting up the first fixed slot of the loop configuration in back supporting seat both sides, and first fixed slot is including being close to first lateral wall and relative second lateral wall in the back supporting seat. A fixing block and an extrusion ring are arranged in the first fixing groove, the fixing block is close to the first side wall, and the extrusion ring is close to the second side wall. The first side wall is ensured to form a first inclined plane with a first vertical plane at the upper part and a second vertical plane at the lower part, and a first inclined plane is formed between the first vertical plane and the second vertical plane.

Further, one side of the first side of the fixed block orientation includes a third vertical surface and a second inclined surface, the first vertical surface and the third vertical surface constitute a fixed cavity which enables the edge of the elastic sealing sleeve to be embedded, and the second inclined surface can follow the first inclined surface, so that the size of the fixed cavity is changed, the elastic sealing sleeve is extruded, and the elastic sealing sleeve is fixed.

Furthermore, one side of the fixed block, facing the extrusion ring, is a third inclined plane, one side of the extrusion ring, facing the fixed block, is a fourth inclined plane, and the fourth inclined plane can move along the third inclined plane, so that the extrusion ring is inserted into the first fixing groove and is extruded and fixed to the fixed block and the elastic sealing sleeve between the fixed block and the first side face. Simultaneously the upper end of the extrusion ring towards one side of the fixed block is provided with a sealing ring capable of covering an opening of the fixed cavity, the upper end of the extrusion ring towards one side of the second side plate is provided with a connecting block, a connecting groove capable of enabling the connecting block to be embedded is formed in the rear supporting seat, and the extrusion ring can be fixed with the rear supporting seat through the matching of the connecting block and the connecting groove. The sealing ring can further extrude the elastic sealing sleeve, and the sealing performance and the stability of the fixation of the elastic sealing sleeve are further enhanced.

Among this technical scheme, be equipped with the second fixed knot who is used for fixed elastic sealing cover in the backup pad and construct, second fixed knot constructs including being located the backup pad towards the second fixed slot of back supporting seat center one side. And an elastic ball column capable of being embedded into the second fixing groove is arranged on the outer side of the elastic sealing sleeve. And meanwhile, an elastic groove is formed in the second fixing groove, the elastic groove is matched with the elastic ball column in shape, and the elastic ball column can be embedded into the elastic groove, so that the elastic sealing sleeve is connected with the supporting plate. The opening part in elasticity groove is provided with the stopper that a plurality of equidistance set up simultaneously, and the surface of stopper is provided with a plurality of antislip strips, and the stopper of elasticity groove opening part is contradicted with the elasticity ball post when elasticity ball post embedding elasticity inslot, increases the friction between elasticity groove and the elasticity ball post, prevents that the roll-off of elasticity ball post from causing the elastic sealing cover to drop. Be equipped with a plurality of grafting strips on the lateral wall of elastic groove, be equipped with on the second fixed slot inner wall with grafting strip complex inserting groove, fastness of being connected between can elastic groove and the second fixed slot.

In the technical scheme, the inner side of the elastic sealing sleeve is provided with a sealing part corresponding to the edge position of the support plate, the middle part of the sealing part is provided with an annular boss, the annular boss is provided with arc tips extending towards two sides, and the two arc tips form a bifurcation structure. Sealing platforms are arranged on two sides of the annular boss, and a sealing cavity with an opening is formed between the side wall of each sealing platform and the side wall of the annular boss. When the supporting plate rotates to enable the elastic sealing sleeve to abut against the surface of the pressure container, the annular boss corresponds to the edge of the supporting plate, the annular boss and the sealing platforms on the two sides of the annular boss are firstly contacted with the surface of the pressure container, and the sealing cavity is extruded at the moment, so that the opening is sealed to achieve the self-sealing effect, and the sealing performance of the annular sealing cavity is further enhanced. Be equipped with a plurality of seal grooves that set up side by side on the sealing bench, can the annular pointed end imbed in the seal groove when sealed chamber pressurized extrusion and compression to further improve sealing performance.

The invention also provides a process for detecting the airtight performance of the pressure container, which is characterized by comprising the following steps of:

s1: fixing the front end of the pressure container on a front supporting seat and enabling the pressure container to penetrate through a rear supporting seat;

s2: moving the front seat body and the rear seat body and respectively propping against the front end and the rear end of the pressure vessel;

s3: moving the rear support base to enable the rear support base to surround the welding seam of the pressure vessel;

s4: starting a driving motor to enable a plurality of structural sheets on two sides of the rear supporting seat to extend out of the rear supporting seat and clamp the column pressure container to enable the periphery of a welding seam of the pressure container to form an annular sealing cavity;

s5: starting a push rod, pushing the driving ring to be close to the supporting ring by the push rod, driving the supporting plate to rotate towards the center of the supporting ring through the transmission rod, enabling the supporting plate to be abutted against the pressure container and cover the annular sealing cavity, and enabling the elastic sealing sleeve to seal the annular sealing cavity;

s6: the control electromagnetic valve is communicated with a compressed air inlet pipe, so that compressed air is filled into the pressure container, and the pressure value in the pressure container is confirmed through the pressure sensor;

s7: step S6, opening the air outlet after the pressure sensor has stable numerical value and is qualified, and closing the air outlet after the compressed air in the pressure container is discharged;

s8: controlling the electromagnetic valve to be communicated with a nitrogen-hydrogen gas inlet pipe to charge nitrogen-hydrogen gas into the pressure container, stopping charging after the pressure is stable, and extracting gas in the annular sealing cavity through the air suction port;

s9: the gas extracted in step S8 is analyzed for the nitrogen-hydrogen gas ratio.

The beneficial effects of the invention are:

1. preceding supporting seat supports pressure vessel jointly with back supporting seat and supports pressure vessel's front end and rear end respectively through preceding pedestal and back pedestal, can guarantee pressure vessel's stable fixed, and the diameter that sets up the annular seal chamber that covers pressure vessel weld joint and annular seal chamber in the back supporting seat simultaneously can be adjusted through deformation mechanism, makes the pressure vessel of different diameters and length detect to reduce cost.

2. The air inlet is also provided with an opening structure capable of enabling the air inlet nozzle to be embedded, the inner wall of the opening structure is provided with a groove, a sealing ring is embedded into the groove, the sealing ring can be abutted against the side wall of the air inlet nozzle embedded into the opening structure, and the sealing performance between the air inlet nozzle and the air inlet can be enhanced through the extrusion deformation of the sealing ring. Meanwhile, the sealing ring is composed of a plurality of flap rings,

3. the deformation mechanism is including setting up a plurality of structure pieces in back supporting seat both sides, and the structure piece annular of every side is arranged and is set up, is provided with the spout that corresponds with every structure piece position on the supporting seat simultaneously, thereby the structure piece can move on the spout and stretch out and draw back towards the center of back supporting seat, thereby the size of the circle of adjusting the structure piece front end structure through adjusting flexible volume, the regulation of the annular seal chamber diameter of being convenient for.

4. The rear supporting seat is provided with a sealing mechanism for sealing the annular sealing cavity, so that external air is prevented from entering the annular sealing cavity, and the accuracy of testing is ensured. The sealing mechanism comprises support rings arranged on two sides of the rear support seat, rotatable support plates are arranged on the support rings at equal intervals in an annular mode, an elastic sealing sleeve is arranged on each support plate, the diameter of the elastic sealing sleeve can be changed through rotation of the support plates, the elastic sealing sleeve can be made to be closely attached to pressure containers with different diameters, and the sealing performance of an annular sealing cavity is guaranteed.

5. Be provided with first fixed knot structure on the back supporting seat, be provided with second fixed knot structure in the backup pad, the elasticity seal cover is fixed the elasticity seal cover through first fixed knot structure and second fixed knot structure, can guarantee the stability that elasticity seal cover and back supporting seat and cardboard are connected, guarantees sealing performance.

6. Be provided with the sealing on the elastic seal cover, the middle part of sealing is provided with annular boss, is provided with the arc pointed end that extends towards both sides on the annular boss, and the both sides of annular sand grip are provided with the seal table simultaneously, and the sealed opening of lateral wall and the constitution of annular boss of seal table is sealed when the sealing is laminated with pressure vessel sealed opening is extrudeed and is reached the effect of self sealedly to further strengthen the sealing performance in annular sealed chamber.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the air intake of the present invention;

FIG. 3 is a schematic view of the rear support base;

FIG. 4 is a schematic view of the structure of the structural sheet mounted on the rear support base;

FIG. 5 is a schematic structural view of a turntable driving structure piece;

FIG. 6 is a cross-sectional structural view of the rear support mount;

FIG. 7 is a schematic view of the structure at A in FIG. 6;

FIG. 8 is a schematic view of the structure at B in FIG. 6;

FIG. 9 is a schematic view of the structure at C in FIG. 6;

wherein the reference numerals are: 100. a front seat body; 110. a front support base; 120. an air inlet; 121. an open structure; 122. a groove; 123. a seal ring; 124. a flap ring; 200. a rear support base; 201. an annular seal cavity; 202. connecting grooves; 210. a rear seat body; 300. a deformation mechanism; 310. a structural sheet; 311. a drive column; 312. a guide post; 320. a chute; 330. a turntable; 331. a drive slot; 332. a transmission gear; 340. a drive gear; 341. a drive motor; 400. a sealing mechanism; 410. a support plate; 420. a support ring; 421. an inclined groove; 430. a drive ring; 440. a transmission rod; 441. a first transmission joint; 442. a second drive joint; 450. a push rod; 500. a first fixing groove; 501. a first vertical face; 502. a second vertical face; 503. a first inclined surface; 510. a fixed block; 511. a third vertical face; 512. a second inclined surface; 513. a third inclined surface; 520. an extrusion ring; 521. a fourth inclined surface; 522. a seal ring; 523. connecting blocks; 600. an elastic sealing sleeve; 610. a sealing part; 611. an annular boss; 612. an arc-shaped tip; 613. a sealing table; 614. sealing the cavity; 615. a sealing groove; 620. an elastic ball stud; 700. a second fixing groove; 701. inserting grooves; 710. an elastic groove; 711. a limiting block; 712. anti-slip strips; 713. and (4) inserting strips.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention is clearly and completely described below with reference to the accompanying drawings:

example 1:

referring to fig. 1 to 6, an airtight performance testing apparatus for pressure vessel fabrication includes a front supporter 110 and a rear supporter 200, the front supporter 110 and the rear supporter 200 being used to support a pressure vessel. Meanwhile, the front end of the front supporting seat 110 is provided with a movable front seat body 100, the front seat body 100 is provided with an air inlet 120 connected with an air inlet nozzle at the front end of the pressure container and an air outlet connected with an air outlet nozzle, and connecting pipes are connected with the air inlet 120, the air outlet nozzle and the air outlet nozzle, so that the sealing performance of the pressure container can be detected by introducing compressed air or nitrogen and hydrogen into the pressure container. Be equipped with the open structure 121 that can make the connecting pipe embedding on the air inlet 120, be equipped with recess 122 on the inner wall of open structure 121, the embedding has sealing washer 123 in the recess 122, and when connecting pipe embedding open structure 121 was connected with air inlet 120, thereby the outer wall of connecting pipe contradicts with sealing washer 123 and extrudes sealing washer 123, can improve the sealing performance that air inlet 120 and suction nozzle are connected. The sealing ring 123 is composed of a plurality of flap rings 124, the flap rings 124 are radially arranged, and the diameters of the flap rings 124 are gradually reduced from the middle to two sides, so that the sealing ring 123 can be better attached to a connecting pipe, and the sealing performance is further ensured.

As shown in fig. 2, 3 and 4, in this embodiment, preferably, the rear support 200 is a movable annular structure, and the position of the annular sealing cavity 201 can be adjusted by moving the rear support 200, so that the annular sealing cavity 201 can conveniently cover the welding seams of different pressure vessels. The deforming mechanism 300 includes a plurality of structural sheets 310 disposed on two sides of the rear support 200, and the structural sheets 310 on the two sides and the rear support 200 together form an annular sealing cavity 201. The structural pieces 310 on one side are arranged in a circular pattern. Meanwhile, a plurality of sliding grooves 320 corresponding to the structural sheets 310 one by one are formed in the rear support base 200, guide posts 312 are arranged on the structural sheets 310, and the guide posts 312 can be embedded into the sliding grooves 320 to enable the structural sheets 310 to move on the sliding grooves 320. The driving mechanism is arranged on the structure pieces 310, the structure pieces 310 can be driven to move on the sliding grooves 320 through the driving mechanism, one ends, facing the center of the rear supporting seat 200, of the structure pieces 310 are acute angles, one ends, facing the center of the supporting seat, of the structure pieces 310 on the same side form a nearly circular structure, the diameter of the nearly circular structure can be adjusted through synchronous movement of the structure pieces 310, and therefore the diameter of the annular sealing cavity 201 can be adjusted.

As shown in fig. 5, in the present embodiment, preferably, the driving mechanism includes a rotating disc 330 disposed on the structural sheet 310, the rotating disc 330 is of an annular structure, a plurality of driving grooves 331 are disposed on the rotating disc 330, and the driving grooves 331 are in an arc structure and correspond to the structural sheet 310 one to one. Meanwhile, the structure piece 310 is provided with a driving column 311 which can be embedded into the driving groove 331, the driving column 311 can move in the driving groove 331, one end of the driving groove 331 can be abutted against the driving column 311 through the rotation of the driving groove 331, and the driving column 311 drives the structure groove to move. The outer edge of the rotating disc 330 is provided with a plurality of transmission teeth 332 so that the outer edge of the rotating disc 330 forms a gear-shaped structure, the rear supporting base 200 is provided with a driving motor 341, the driving motor 341 is connected with a driving gear 340, and the driving gear 340 is meshed with the gear-shaped structure formed by the outer edge of the rotating disc 330, so that the rotating disc 330 is driven to rotate and drive the structure piece 310 to move, and the diameter of the annular sealing cavity 201 is adjusted.

Example 2:

referring to fig. 3 and fig. 6, the present embodiment provides an apparatus for detecting an airtight performance in manufacturing a pressure vessel, and in addition to the technical features of the above embodiment, the present embodiment further includes the following technical features.

As shown in fig. 3 and fig. 6, a sealing mechanism 400 for sealing a ring 522-shaped sealing cavity 614201 is disposed on the rear supporting seat 200, the sealing mechanism 400 includes a supporting frame of an annular structure disposed on the rear supporting seat 200, and a plurality of annular supporting plates 410 disposed at equal intervals are rotatably connected to the supporting frame. Meanwhile, a driving ring 430 is surrounded on the outer side of the support frame, an inclined groove 421 is arranged on the support frame, a transmission rod 440 is arranged in the inclined groove 421, one end of the transmission rod 440 penetrating through the inclined groove 421 is hinged with the support plate 410, and the other end is hinged with the driving ring 430. The driving rod 440 includes a first driving joint 441 and a second driving joint 442, one end of the first driving joint 441 is hinged to the supporting plate 410, the other end of the second driving joint 442 is hinged to the second driving joint 442, the other end of the second driving joint 442 is hinged to the driving ring 430, the driving ring 430 can push the supporting plate 410 to rotate by the movement of the driving ring 430, the driving ring 430 is connected with a push rod 450, and the movement of the driving ring 430 is pushed by the push rod 450.

As shown in fig. 6, in the present embodiment, it is preferable that the supporting plates 410 have a fan-shaped structure and can rotate toward the center of the supporting ring 420, the adjacent supporting plates 410 are closely arranged, one side of each supporting plate 410 facing the center of the supporting ring 420 is surrounded by a circular structure, and the supporting plates 410 are connected to the elastic sealing sleeves 600. The elastic sealing sleeve 600 can be expanded or contracted through the synchronous rotation of the support plates 410, so that the surface attachment of the elastic sealing sleeve 600 and a pressure container can be ensured when the pressure containers with different diameters are treated, and the sealing performance is ensured.

Example 3:

referring to fig. 7 and 9, the present embodiment provides an apparatus for detecting an airtight performance in manufacturing a pressure vessel, and in addition to the technical features of the above embodiment, the present embodiment further includes the following technical features.

As shown in fig. 7, a first fixing structure for fixing the elastic sealing boot 600 is provided on the rear support 200, the first fixing structure includes a first fixing groove 500 of a ring structure provided at both sides of the rear support 200, and the first fixing groove 500 includes a first sidewall adjacent to and an opposite second sidewall in the rear support 200. A fixing block 510 and a pressing ring 520 are disposed in the first fixing groove 500, the fixing block 510 is close to the first sidewall, and the pressing ring 520 is close to the second sidewall. The first side wall is ensured to form a first inclined surface 503 with a first vertical surface 501 at the upper part and a second vertical surface 502 at the lower part, wherein the first inclined surface 503 is formed between the first vertical surface 501 and the second vertical surface 502.

The side of the fixing block 510 facing the first side surface includes a third vertical surface 511 and a second inclined surface 512, the first vertical surface 501 and the third vertical surface 511 constitute a fixing cavity in which the edge of the elastic sealing sleeve 600 is embedded, and the second inclined surface 512 can follow the first inclined surface 503, thereby changing the size of the fixing cavity, thereby pressing the elastic sealing sleeve 600, and fixing the elastic sealing sleeve 600.

The side of the fixing block 510 facing the pressing ring 520 is a third inclined surface 513, the side of the pressing ring 520 facing the fixing block 510 is a fourth inclined surface 521, and the fourth inclined surface 521 can move along the third inclined surface 513, so that the pressing ring 520 is inserted into the first fixing groove 500 and is pressed and fixed to the fixing block 510 and the elastic sealing sleeve 600 between the fixing block 510 and the first side surface. Meanwhile, the upper end of one side of the extrusion ring 520 facing the fixed block 510 is provided with a sealing ring 522 capable of covering an opening of the fixed cavity, the upper end of one side of the extrusion ring 520 facing the second side plate is provided with a connecting block 523, the rear support base is provided with a connecting groove 202 capable of enabling the connecting block 523 to be embedded, and the extrusion ring 520 and the rear support base 200 can be fixed through the matching of the connecting block 523 and the connecting groove 202. The sealing ring 522 can further compress the elastomeric sealing boot 600, further enhancing the sealing performance and stability of the elastomeric sealing boot 600 in its secure position.

As shown in fig. 9, in the present embodiment, it is preferable that the support plate 410 is provided with a second fixing structure for fixing the elastic sealing boot 600, and the second fixing structure includes a second fixing groove 700 at a side of the support plate 410 facing the center of the rear support base 200. An elastic ball column 620 capable of being inserted into the second fixing groove 700 is provided on the outer side of the elastic sealing boot 600. Meanwhile, an elastic groove 710 is formed in the second fixing groove 700, the elastic groove 710 is matched with an elastic ball column 620 in shape, and the elastic ball column 620 can be inserted into the elastic groove 710, thereby connecting the elastic sealing boot 600 with the support plate 410. Meanwhile, a plurality of limiting blocks 711 arranged at equal intervals are arranged at the opening of the elastic groove 710, a plurality of anti-slip strips 712 are arranged on the surface of the limiting blocks 711, when the elastic ball column 620 is embedded into the elastic groove 710, the limiting blocks 711 at the opening of the elastic groove 710 are abutted against the elastic ball column 620, friction between the elastic groove 710 and the elastic ball column 620 is increased, and the elastic sealing sleeve 600 is prevented from falling off due to the fact that the elastic ball column 620 slides out. The outer side wall of the elastic groove 710 is provided with a plurality of insertion strips 713, and the inner wall of the second fixing groove 700 is provided with the insertion groove 701 matched with the insertion strips 713, so that the firmness of connection between the elastic groove 710 and the second fixing groove 700 can be improved.

Example 4:

referring to fig. 8, the present embodiment provides an apparatus for detecting airtightness when manufacturing a pressure vessel, and in addition to the technical features of the above-described embodiments, the present embodiment further includes the following technical features.

As shown in fig. 8, the inner side of the elastic sealing sleeve 600 is provided with a sealing portion 610 corresponding to the edge position of the support plate 410, the middle of the sealing portion 610 is provided with an annular boss 611, the annular boss 611 is provided with arc-shaped tips 612 extending towards both sides, and the two arc-shaped tips 612 form a bifurcated structure. Sealing platforms 613 are arranged on two sides of the annular boss 611, and a sealing cavity 614 with an opening is formed between the side wall of the sealing platform 613 and the side wall of the annular boss 611. When the support plate 410 rotates to make the elastic sealing sleeve 600 abut against the surface of the pressure vessel, since the annular boss 611 corresponds to the edge of the support plate 410, the annular boss 611 and the sealing platforms 613 at the two sides of the annular boss 611 are firstly contacted with the surface of the pressure vessel, and at this time, the opening is sealed when the sealing cavity 614 is squeezed, so that the self-sealing effect is achieved, and the sealing performance of the annular sealing cavity 201 is further enhanced. The sealing table 613 is provided with a plurality of sealing grooves 615 arranged side by side, and when the sealing cavity 614 is compressed by pressure and extrusion, the annular tip can be embedded into the sealing grooves 615, so that the sealing performance is further improved.

s1: fixing the front end of the pressure vessel on a front supporting seat and enabling the pressure vessel to penetrate through a rear supporting seat;

s3: moving the rear supporting seat to enable the rear supporting seat to surround the welding seam of the pressure vessel;

s6: the control electromagnetic valve is communicated with a compressed air inlet pipe, so that compressed air is filled in the pressure container, and the pressure value in the pressure container is confirmed through the pressure sensor;

s8: controlling an electromagnetic valve to be communicated with a nitrogen-hydrogen gas inlet pipe to charge nitrogen-hydrogen gas into the pressure container, stopping charging after the pressure is stable, and pumping gas in the annular sealing cavity through an air suction port;

The above embodiments are only preferred embodiments of the present invention, not all embodiments, and other embodiments obtained based on the above embodiments by those skilled in the art should fall within the protection scope of the present invention without making creative efforts, so that: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. A sealing structure of a pressure container air tightness detection device is characterized by comprising:

a front support seat (110),

a rear support base (200) which supports the pressure vessel together with the front support base (110);

wherein, a movable front seat body (100) which props against the front end of the pressure vessel is arranged in front of the front supporting seat (110), an air inlet (120) which is connected with an air inlet nozzle at the front end of the pressure vessel and an air outlet which is connected with an air outlet nozzle are arranged on the front seat body (100),

an opening structure (121) capable of enabling the connecting pipe to be embedded into is arranged on the air inlet (120), a groove (122) is formed in the inner wall of the opening structure (121), a sealing ring (123) is embedded into the groove (122), the sealing ring (123) is composed of a plurality of flap rings (124), the flap rings (124) are arranged in a radial mode, and the diameter of the flap rings (124) is gradually reduced from the middle to two sides;

the rear support base (200) is provided with an annular sealing cavity (201) covering the welding position of the pressure vessel and an air suction port communicated with the annular cavity, the rear support base (200) is provided with a deformation mechanism (300) capable of changing the diameter of the annular sealing cavity (201), the deformation mechanism (300) is provided with a sealing mechanism (400), and a movable rear base body (210) abutting against the rear end of the pressure vessel is arranged behind the rear support base (200);

a pressure sensor is arranged at an air outlet on the front base body (100), the air inlet (120) is connected with an electromagnetic valve, and the electromagnetic valve is connected with a nitrogen hydrogen gas inlet pipe and a compressed air inlet pipe.

2. The sealing structure of the pressure vessel airtightness detection apparatus according to claim 1, wherein the rear support seat (200) is a movable annular structure, and the deformation mechanism (300) includes:

the structural sheets (310) are arranged on two sides of the rear supporting seat (200), a plurality of structural sheets are arranged on each side, the adjacent structural sheets (310) are closely arranged, and the structural sheets (310) on the two sides and the inner ring of the rear supporting seat (200) form the annular sealing cavity (201);

the sliding grooves (320) are arranged on the side surfaces of the rear supports and correspond to the structural sheets (310) one by one, guide columns (312) capable of being embedded into the sliding grooves (320) are arranged on the structural sheets (310), and the guide columns (312) can move in the sliding grooves (320) to enable the structural sheets (310) to stretch towards the inner side of the rear support base (200);

the driving mechanism drives the structural piece (310) to move in the sliding groove (320);

wherein, one end of the structural sheet (310) facing to the center of the rear supporting seat (200) is an acute angle.

3. The sealing structure of the airtightness detection apparatus according to claim 2, wherein the drive mechanism includes:

the rotary disc (330) is of an annular structure and is arranged on the outer side of the structural sheet (310);

the driving grooves (331) are arranged on the turntable (330), the number of the driving grooves is consistent with that of the structure pieces (310), the structure pieces (310) are provided with driving columns (311) which can be embedded into the driving grooves (331), and the driving columns (311) can move in the driving grooves (331);

the transmission gear (332) is arranged on the edge of the outer ring of the rotating disc (330) to enable the outer ring of the rotating disc (330) to form a gear structure;

the driving motor (341) is arranged on the rear supporting seat (200) and is connected with a driving gear (340), and the driving gear (340) is meshed with a gear structure of an outer ring of the turntable (330);

the driving groove (331) is of an arc-shaped structure, and when the driving motor (341) drives the turntable (330) to rotate, the driving groove (331) drives the structure piece (310) to move on the sliding groove (320) through the driving column (311).

4. The sealing structure of the pressure vessel airtightness detection apparatus according to claim 2, wherein the sealing mechanism (400) includes:

support rings (420) disposed at both sides of the rear support base (200);

the supporting plate (410) is provided with a plurality of supporting plates which are distributed on the supporting ring (420) in an annular and equidistant mode and hinged with the supporting ring (420);

the inclined groove (421) is arranged at the edge of the supporting ring (420) and is connected with the upper end surface and the side wall of the supporting ring (420);

a driving ring (430) surrounding the outside of the supporting ring (420);

a transmission rod (440) passing through the inclined groove (421) to connect the support plate (410) and the driving ring (430);

a push rod (450) pushing the drive ring (430) closer to or away from the support ring (420);

the supporting plates (410) are of fan-shaped structures and can rotate towards the center of the supporting ring (420), the adjacent supporting plates (410) are tightly arranged, one side, facing the center of the supporting ring (420), of each supporting plate (410) is surrounded to form a circular structure, each supporting plate (410) is connected with an elastic sealing sleeve (600) together, and the supporting plates (410) are driven to rotate to adjust the diameter of the elastic sealing sleeves (600);

the driving rod (440) comprises a first driving joint (441) and a second driving joint (442), one end of the first driving joint (441) is hinged with one end of the second driving joint (442), the other end of the first driving joint (441) is hinged with the supporting plate (410), and the other end of the second driving joint (442) is hinged with the driving ring (430).

5. The sealing structure of the pressure vessel tightness detection device according to claim 4, characterized in that a first fixing structure for fixing an elastic sealing sleeve (600) is provided on the rear supporting seat (200), and the first fixing structure comprises:

the first fixing grooves (500) are of annular structures, are arranged on two sides of the rear supporting seat (200), and have diameters smaller than those of the supporting rings (420);

the fixing block (510) can be embedded into the first fixing groove (500) and forms a fixing cavity with the inner wall of the first fixing groove (500), and the elastic sealing sleeve (600) can be embedded into the fixing cavity;

the extrusion ring (520) can be embedded into the first fixing groove (500) and is abutted against the fixing block (510);

wherein the side wall of the first fixing groove (500) facing the fixing block (510) comprises a first vertical surface (501) arranged at the upper part and a second vertical surface (502) arranged at the lower part, a first inclined surface (503) is formed between the first vertical surface (501) and the second vertical surface (502),

one side of the fixing block (510) facing the first fixing groove (500) comprises a third vertical surface (511) and a second inclined surface (512), the third vertical surface (511) and the first vertical surface (501) form the fixing cavity, the second inclined surface (512) can move along the first inclined surface (503), one side of the fixing block (510) facing the extrusion ring (520) is a third inclined surface (513),

one side of the extrusion ring (520) towards the fixing block (510) is a fourth inclined surface (521), the fourth inclined surface (521) can move along the third inclined surface (513), the extrusion ring (520) is provided with a sealing ring (522) covering the opening of the fixing cavity and a connecting block (523) opposite to the sealing ring (522), and the rear supporting seat (200) is provided with a connecting groove (202) capable of enabling the connecting block (523) to be embedded.

6. A sealing structure of a device for detecting the tightness of a pressure vessel according to claim 4, characterized in that said supporting plate (410) is provided with a second fixing structure for fixing an elastic sealing sleeve (600), said second fixing structure comprising:

a second fixing groove (700) disposed at one side of the support plate (410) toward the center of the support ring (420);

the elastic ball column (620) is arranged on one side of the elastic sealing sleeve (600) abutting against the supporting plate (410) and can be embedded into the second fixing groove (700);

the elastic groove (710) is arranged in the second fixing groove (700) and is matched with the elastic ball column (620) in shape, so that the elastic ball column (620) can be embedded into the elastic groove (710);

a limiting block (711) which is arranged at the opening of the elastic groove (710) and is abutted against the elastic ball column (620);

wherein the limiting block (711) is provided with a plurality of openings which are distributed at the same distance in the elastic groove (710), the surface of the limiting block (711) is provided with a plurality of anti-skid strips (712) in parallel,

the outer side wall of the elastic groove (710) is provided with a plurality of inserting strips (713), and the inner wall of the second fixing groove (700) is provided with an inserting groove (701) matched with the inserting strips (713).

7. The sealing structure of the pressure vessel tightness detection device according to claim 6, characterized in that the elastic sealing sleeve (600) is provided with:

a sealing part (610) which is arranged on one side of the elastic sealing sleeve (600) facing to the center of the support ring (420) and corresponds to the edge of the support plate (410);

the annular boss (611) is arranged in the middle of the sealing part (610), and an arc-shaped tip (612) extending towards two sides is arranged on the annular boss (611);

the sealing platform (613) is arranged at two sides of the annular boss (611), the side wall facing one side of the annular boss (611) is arc-shaped, and the sealing platform and the side wall of the Huaxin boss form a sealing cavity (614) structure with an opening;

the sealing table (613) is provided with a plurality of sealing grooves (615) which are arranged side by side, and the annular tip can be embedded into the sealing grooves (615).

8. The method for detecting the manufacturing airtightness of the pressure container is characterized by comprising the following steps of:

s1: fixing the front end of the pressure vessel on a front support seat (110) and enabling the pressure vessel to pass through a rear support seat (200);

s2: moving the front seat body (100) and the rear seat body (120) to respectively abut against the front end and the rear end of the pressure vessel;

s3: moving the rear support base (200) to enable the rear support base (200) to surround the welding seam of the pressure vessel;

s4: starting a driving motor (341) to enable a plurality of structural sheets (310) on two sides of the rear supporting seat (200) to extend out of the rear supporting seat (200) and clamp the column pressure vessel to enable the periphery of a welding seam of the pressure vessel to form an annular sealing cavity (201);

s5: starting a push rod (450), wherein the push rod (450) pushes a driving ring (430) to be close to a supporting ring (420) and drives a supporting plate (410) to rotate towards the center of the supporting ring (420) through a transmission rod (440), so that the supporting plate (410) is abutted against the pressure container and covers an annular sealing cavity (201), and an elastic sealing sleeve (600) is used for sealing the annular sealing cavity (201);

s8: the electromagnetic valve is controlled to be communicated with a nitrogen-hydrogen gas inlet pipe to charge nitrogen-hydrogen gas into the pressure container, the charging is stopped after the pressure is stable, and the gas in the annular sealing cavity (201) is extracted through the air suction port;