Air tightness detection device and detection method for quality inspection of bellows

Abstract

The present invention relates to the technical field of air tightness detection of bellows, and discloses an air tightness detection device and a detection method for quality inspection of bellows, including a detection platform, fixed installation components are arranged at both ends above the detection platform, a mobile support frame is arranged between the fixed installation components, the bellows is located above the mobile support frame, the fixed installation component includes a fixed installation mechanism and a sealing installation mechanism, the two ends of the bellows are respectively connected to the fixed installation mechanism and the sealing installation mechanism, and a boosting component is arranged on one side of the sealing installation mechanism. The air supply mechanism is introduced into one end of the bellows sealing installation through the air intake mechanism in the boosting component, and at this time, the mobile support frame is used to compress and fix one end of the bellows, so that the end of the bellows close to the sealing installation is in an extended state, so that each corrugation of the end of the bellows close to the seal can be stretched, and it is difficult to perform air tightness detection on the area between the corrugations in the compressed state, thereby avoiding missed detection.

Description

Technical Field

[0001] The invention relates to the technical field of bellows air tightness detection, in particular to an air tightness detection device and a detection method for quality inspection of bellows. Background Art

[0002] Bellows refers to a tubular elastic sensitive element connected by foldable corrugated sheets along the folding and stretching direction. Bellows are widely used in construction, factory production, and instrumentation. Their main purpose is to be used as a measuring element for pressure measuring instruments. They are elastic and can convert pressure into displacement or force. The wall of the bellows is thinner and the sensitivity is higher. The measuring range is from tens of Pa to tens of MPa. The open end is fixed, the sealed end is in a free state, and an auxiliary coil spring or reed is used to increase the elasticity. When working, it stretches along the length of the tube under the action of internal pressure;

[0003] During the production process of bellows, it is necessary to conduct air tightness test on the bellows. Due to the characteristics of the bellows, it has high elasticity and the middle part of the bellows is in a free state. When it is tested for air tightness, it often shakes, affecting the testing process. In addition, due to the characteristics of the corrugations of the bellows, it is very easy to cause damage during the processing of the bellows. When the bellows are in a compressed state, the damaged part will be blocked by the extruded corrugations, and it is impossible to test the air tightness. Therefore, the state of the bellows itself is extremely important during the test. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an airtightness detection device and a detection method for the quality inspection of bellows, which are capable of introducing an air supply mechanism into one end of the bellows sealing installation through an air intake mechanism in a booster assembly, and at this time, a movable support frame is used to compress and fix one end of the bellows, so that the end of the bellows close to the sealing installation is in an extended state, so that each corrugation of the end of the bellows close to the seal can be stretched out, and it is difficult to perform airtightness detection on the area between the corrugations in a compressed state, thereby avoiding missed detection and the like. The present invention solves the problem that during the production process of the bellows, it is necessary to perform airtightness detection on the bellows. Due to the characteristics of the bellows, the bellows has high elasticity, and the middle part of the bellows is in a free state. When the bellows are tested for airtightness, shaking often occurs, affecting the testing process. In addition, due to the characteristics of the corrugations of the bellows, the bellows are easily damaged during processing. When the bellows are in a compressed state, the damaged part will be blocked by the corrugations in an extruded state, and the bellows cannot be tested for airtightness.

[0005] In order to solve the above-mentioned technical problem that during the production process of the bellows, it is necessary to perform an airtightness test on the bellows. Due to the characteristics of the bellows, the bellows has high elasticity and the middle part of the bellows is in a free state. When the bellows is tested for airtightness, it often shakes, affecting the testing process. In addition, due to the characteristics of the corrugations of the bellows, the bellows are easily damaged during processing. When the bellows are in a compressed state, the damaged parts will be blocked by the corrugations in an extruded state, making it impossible to perform an airtightness test on the bellows. The present invention provides the following technical solutions: an airtightness testing device, including a testing machine, fixed installation components are provided at both ends above the testing machine, a movable support frame is provided between the fixed installation components, the bellows is located above the movable support frame, and the fixed installation component includes a fixed installation mechanism and a sealing installation mechanism , the two ends of the bellows are respectively connected to the fixed mounting mechanism and the sealing mounting mechanism, a boosting assembly is arranged on one side of the sealing mounting mechanism, the boosting assembly includes an air supply mechanism, an air intake mechanism and an air pressure detection instrument, the air supply mechanism is located on one side of the sealing mounting mechanism, the air supply mechanism is connected to the air intake mechanism, the air intake mechanism is located at the end of the sealing mounting mechanism, one end of the air intake mechanism extends inside the sealing mounting mechanism, and the air pressure detection instrument is installed on the air intake mechanism; an adjusting sealing assembly is arranged at the end of the fixed mounting mechanism, the adjusting sealing assembly includes a driving mechanism and a sealing mechanism, the sealing mechanism is located inside the bellows, the driving mechanism is located at the end of the fixed mounting mechanism, and the other end of the driving mechanism is connected to the sealing mechanism.

[0006] Preferably, an annular clamp is arranged above the fixed installation mechanism, and the annular clamp consists of a fixed clamp seat and a movable clamp seat, the fixed clamp seat is located above the fixed installation mechanism, the movable clamp seat is movably installed above the fixed clamp seat, and locking buttons are arranged at both ends of the movable clamp seat and the fixed clamp seat.

[0007] Preferably, the sealing installation mechanism includes a fixed inner cylinder and a movable sleeve, a support platform is provided at one end of the fixed inner cylinder, the movable sleeve is movably installed on a side of the support platform away from the air intake mechanism, the movable sleeve is sleeved on the top of the fixed inner cylinder, a groove is provided on the circumference of the fixed inner cylinder, the inner diameter of the movable sleeve is gradually reduced from the outside to the inside, an expanding diameter sealing plug is provided inside the fixed inner cylinder, the expanding diameter sealing plug is provided with a bolt pull rod, the other end of the bolt pull rod extends to the other side of the support platform, and one end of the air intake mechanism passes through the expanding diameter sealing plug.

[0008] Preferably, the air supply mechanism includes an air pump and a connecting pipe. The air pump is installed on one side of the sealing installation mechanism, and the air outlet end of the air pump is connected to one end of the air intake mechanism through the connecting pipe; the air intake mechanism includes an air intake push rod, an air intake plug, an air intake valve and an air intake terminal. One end of the air intake plug extends into the interior of the expanded diameter sealing plug, and the other end of the air intake plug is connected to the air intake terminal. The air intake terminal is connected to the connecting pipe through the air intake valve. The air intake push rod is provided on one side of the bottom of the air intake terminal, and the air intake push rod is fixed to the upper surface of the detection machine.

[0009] Preferably, the movable support frame includes a fixed support seat and a movable support seat, the fixed support seat is arranged close to one side of the sealing installation mechanism, and the movable support seat is arranged on the other side of the fixed support seat; a restraining ring is arranged above the movable support seat, and the restraining ring is used to restrain the corrugated recess of the corrugated pipe, and a corrugated support ring is arranged above the fixed support seat, and the corrugated support ring is composed of upper and lower parts that are snap-fitted, and a movable support rod is arranged between the restraining ring and the corrugated support ring, one end of the movable support rod is fixedly connected to the restraining ring, and the other end of the movable support rod is slidably connected to the corrugated support ring.

[0010] Preferably, a guide block is provided at the bottom of the movable support seat, a guide groove is provided on the upper surface of the detection machine platform, the guide block is slidably installed inside the guide groove, a ball screw is provided inside the guide groove, and the guide block is threadedly connected to the ball screw.

[0011] Preferably, the sealing mechanism comprises a circular carrier plate, a sealing rubber pad and a movable carrier plate, the circular carrier plate is arranged in close contact with the center of the sealing rubber pad, the movable carrier plate is located on the other side of the sealing rubber pad, and a connecting sleeve is arranged on the other side of the movable carrier plate.

[0012] Preferably, the connecting sleeve is sleeved on the output end of the driving mechanism, a limiting hole is arranged in the middle of the connecting sleeve, an elastic limiting block is fixedly arranged on the outer side of the fixed installation mechanism, the elastic limiting block is adapted to the limiting hole, the connecting sleeve moves toward the inside of the corrugated tube, and the limiting hole moves toward the direction of the elastic limiting block, and when the elastic limiting block extends into the limiting hole, the movable carrier plate stops at the position of the corrugated support ring.

[0013] Preferably, the driving mechanism includes a driving push rod, which is arranged at one end outside the fixed installation mechanism, and the output end of the driving push rod passes through the movable carrier and is connected to the circular carrier. A driving block is arranged above the driving push rod, and the connecting sleeve is sleeved on the outside of the driving push rod. A movable long groove is opened on the connecting sleeve, and the driving block is located inside the movable long groove.

[0014] A detection method for quality inspection of a corrugated pipe applies the air tightness detection device.

[0015] Compared with the prior art, the present invention provides an airtightness detection device and a detection method for quality inspection of bellows, which have the following beneficial effects:

[0016] 1. The air tightness testing equipment is used to fix and install the bellows through the fixed installation components at both ends of the testing machine. The fixed installation mechanism in the fixed installation component is used to fix and install one end of the bellows. The sealing installation mechanism is used to seal and install the other end of the bellows. The annular clamp on the fixed installation mechanism is used to fix and install one end of the bellows. The fixed clamp seat cooperates with the movable clamp seat to better insert one end of the bellows into the annular clamp for fixing. The movable clamp seat is then fixed by the locking button so that the bellows can be fixed on the annular clamp. The annular clamp on the fixed installation mechanism is used to fix one end of the bellows. Fixed installation, in which the fixed holder cooperates with the movable holder to better insert one end of the bellows into the annular clamp for fixing, and then the movable holder is fixed by the locking button so that the bellows can be fixed on the annular clamp; then the air supply mechanism is introduced into one end of the bellows sealing installation through the air intake mechanism in the booster assembly, and at this time, one end of the bellows is compressed and fixed by the movable support frame, so that the end of the bellows close to the sealing installation is in an extended state, so that each corrugation of the bellows close to the sealing end can be stretched out, and it is difficult to perform airtightness detection on the area between the corrugations in the compressed state to avoid missed detection.

[0017] 2. The air tightness detection equipment moves the circular carrier plate in the sealing mechanism into the inside of the bellows under the drive of the driving mechanism. When moving, the circular carrier plate drives the sealing rubber pad to move together. Since the outer diameter of the sealing rubber pad is larger than the minimum inner diameter of the bellows, when the sealing rubber pad moves into the inside of the bellows, the sealing rubber pad is affected by the inner diameter of the bellows, and the sealing rubber pad rolls in the opposite direction of the movement so as to better enter the bellows. At the same time, the driving mechanism drives the connecting sleeve to push the moving carrier plate to move into the inside of the bellows with the circular carrier plate; the connecting sleeve is sleeved at the output end of the driving mechanism. When the driving mechanism drives the circular carrier plate to move into the inside of the bellows, the moving carrier plate moves with it. During the movement, when the limiting hole on the connecting sleeve moves to the elastic limiting block outside the fixed installation mechanism, the elastic limiting block extends into the limiting hole to fix the connecting sleeve, and then the connecting sleeve is driven in the opposite direction by the driving mechanism. At this time, the connecting sleeve is in a fixed state, and the driving mechanism can only drive the circular carrier plate and the sealing rubber pad to move in the opposite direction, that is, the circular carrier plate and the sealing rubber pad move in the direction of the moving carrier plate; at this time, the outer edge of the sealing rubber pad is in a state of being rolled up in the direction of the sealing installation mechanism and contacts with the inner wall of the bellows, and when one end of the sealing installation mechanism is inflated, the sealing rubber pad will be further attached to the inner wall of the bellows, thereby realizing the sealing treatment of the other end of the bellows.

[0018] 3. The air tightness detection equipment inflates the inside of the extended bellows through the air supply mechanism to increase the internal air pressure, and then stops the air supply. The air pressure change inside the extended bellows is detected by observing the air pressure detection instrument, so as to detect the air tightness of the bellows. Air is supplied to one end of the bellows through the air pump and the connecting pipe in the air supply mechanism. When in use, the air intake rod is inserted into the expanded diameter sealing plug through the air intake push rod of the air intake mechanism, the air intake valve on the air intake terminal is opened, the air pump is started, and air is filled into the bellows through the connecting pipe. When the inflation process is completed, the air pump output is stopped and the air intake valve is closed to prevent the air pump from affecting the air tightness detection inside the bellows.

[0019] 4. The air tightness detection equipment compresses the section of the bellows in the stretched state after the detection of the section is completed, so that the bellows compressed at the other end is stretched and fixed by a movable support frame; the fixed support seat in the movable support frame cooperates with the movable support seat to fix the end of the bellows that needs to be compressed, wherein the binding ring above the movable support seat fixes one end of the bellows so that the binding ring is bound at the corrugated depression of the bellows, and then the corrugated support ring on the fixed support seat fixes the other end of the bellows that needs to be compressed, thereby making the compressed part of the bellows in a tightly compressed and fixed state, and the bellows in the compressed state is supported by the movable support rod between the movable support seat and the fixed support seat, so that the subsequent sealing mechanism can enter the front end of the compressed bellows, and then the air tightness inside the section of the bellows in the stretched state is detected and processed by adjusting the sealing component and the boosting component, thereby realizing the overall air tightness detection of the bellows. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is one of the overall three-dimensional structural schematic diagrams of the present invention;

[0021] Figure 2 This is the second schematic diagram of the overall three-dimensional structure of the present invention;

[0022] Figure 3 This is one of the schematic diagrams of the internal structure of the bellows during testing of the present invention;

[0023] Figure 4 For the present invention Figure 3 A local enlarged structural schematic diagram;

[0024] Figure 5 For the present invention Figure 3 A schematic diagram of the local enlarged structure at B;

[0025] Figure 6 This is the second schematic diagram of the internal structure of the bellows during testing of the present invention;

[0026] Figure 7 For the present invention Figure 6 A schematic diagram of the local enlarged structure at C;

[0027] Figure 8 It is a schematic diagram of a partial exploded structure of the sealing installation mechanism of the present invention;

[0028] Fig. 9 It is a partial planar structural schematic diagram of the fixed installation mechanism of the present invention.

[0029] In the figure: 1. Inspection machine; 11. Guide slide; 2. Fixed installation assembly; 21. Fixed installation mechanism; 211. Ring clamp; 212. Fixed card seat; 213. Mobile card seat; 214. Locking button; 22. Sealing installation mechanism; 221. Fixed inner cylinder; 222. Movable sleeve; 223. Support platform; 224. Slot; 225. Expanded diameter sealing plug; 226. Bolt pull rod; 3. Mobile support frame; 31. Fixed support seat; 32. Mobile support seat; 321. Guide block; 322. Ball screw; 33. Binding ring; 34. Corrugated support ring; 35. Mobile Support rod; 4. Boosting assembly; 41. Air supply mechanism; 411. Air pump; 412. Connecting pipe; 42. Air intake mechanism; 421. Air intake push rod; 422. Air intake plug rod; 423. Air intake valve; 424. Air intake terminal; 43. Air pressure detection instrument; 5. Adjusting sealing assembly; 51. Driving mechanism; 511. Driving push rod; 512. Driving block; 52. Sealing mechanism; 521. Round carrier plate; 522. Sealing rubber pad; 523. Movable carrier plate; 524. Connecting sleeve; 525. Limiting hole; 526. Elastic limiting block; 527. Movable long groove; 6. Bellows. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-9A gas tightness detection device comprises a detection platform 1, wherein fixed installation components 2 are arranged at both ends above the detection platform 1, a mobile support frame 3 is arranged between the fixed installation components 2, a bellows 6 is located above the mobile support frame 3, the fixed installation component 2 comprises a fixed installation mechanism 21 and a sealing installation mechanism 22, both ends of the bellows 6 are respectively connected to the fixed installation mechanism 21 and the sealing installation mechanism 22, a booster component 4 is arranged on one side of the sealing installation mechanism 22, the booster component 4 comprises an air supply mechanism 41, an air intake mechanism 42 and an air pressure detection instrument 43, the air supply mechanism 41 is located at the sealing installation mechanism On one side of the structure 22, the air supply mechanism 41 is connected to the air intake mechanism 42, the air intake mechanism 42 is located at the end of the sealing installation mechanism 22, one end of the air intake mechanism 42 extends into the sealing installation mechanism 22, and the air pressure detection instrument 43 is installed on the air intake mechanism 42; an adjusting sealing assembly 5 is provided at the end of the fixed installation mechanism 21, the adjusting sealing assembly 5 includes a driving mechanism 51 and a sealing mechanism 52, the sealing mechanism 52 is located inside the bellows 6, the driving mechanism 51 is located at the end of the fixed installation mechanism 21, and the other end of the driving mechanism 51 is connected to the sealing mechanism 52.

[0032] When in use, the bellows 6 is fixedly installed through the fixed installation components 2 at both ends of the detection machine 1, the fixed installation mechanism 21 in the fixed installation component 2 is fixedly installed on one end of the bellows 6, and the sealing installation mechanism 22 is sealingly installed on the other end of the bellows 6, and then the air supply mechanism 41 is introduced into the sealing end of the bellows 6 through the air intake mechanism 42 in the boosting component 4, and at this time, the mobile support frame 3 is used to compress and fix one end of the bellows 6, so that the end of the bellows 6 close to the sealing installation is in an extended state, so that each corrugation of the end of the bellows 6 close to the seal can be stretched, and it is difficult to perform airtight detection on the area between the corrugations in the compressed state, so as to avoid missed detection, and then the adjusting sealing component 5 is used to seal the other end of the bellows 6, and the adjusting sealing component 5 is used to adjust the sealing component 5. The driving mechanism 51 drives the sealing mechanism 52 to extend into the interior of the bellows 6 until the front end of the compressed part of the bellows 6, and seals the other end of the bellows 6 in the extended state, and then the air supply mechanism 41 inflates the interior of the bellows 6 in the extended state to increase the internal air pressure, and then stops supplying air, and detects the air pressure change inside the extended bellows 6 by observing the air pressure detection instrument 43, so as to detect the air tightness of the bellows 6. After the detection of the bellows 6 in the extended state is completed, the section is compressed to stretch the bellows 6 compressed at the other end, and fixed by the mobile support frame 3, and then the air tightness of the interior of the bellows 6 in the extended state is detected by adjusting the sealing component 5 and the boost component 4, thereby realizing the overall air tightness detection of the bellows 6.

[0033] Furthermore, an annular clamp 211 is arranged above the fixed installation mechanism 21, and the annular clamp 211 consists of a fixed clamp seat 212 and a movable clamp seat 213, the fixed clamp seat 212 is located above the fixed installation mechanism 21, and the movable clamp seat 213 is movably installed above the fixed clamp seat 212, and locking buttons 214 are arranged at both ends of the movable clamp seat 213 and the fixed clamp seat 212; one end of the bellows 6 is fixedly installed by the annular clamp 211 on the fixed installation mechanism 21, wherein the fixed clamp seat 212 cooperates with the movable clamp seat 213 to better insert one end of the bellows 6 into the annular clamp 211 for fixing, and then the movable clamp seat 213 is fixed by the locking button 214, so that the bellows 6 can be fixed on the annular clamp 211.

[0034] Furthermore, the sealing installation mechanism 22 includes a fixed inner cylinder 221 and a movable sleeve 222, one end of the fixed inner cylinder 221 is provided with a support platform 223, the movable sleeve 222 is movably installed on the side of the support platform 223 away from the air intake mechanism 42, the movable sleeve 222 is sleeved on the top of the fixed inner cylinder 221, the circumference of the fixed inner cylinder 221 is provided with a groove 224, the inner diameter of the movable sleeve 222 is gradually reduced from the outside to the inside, the fixed inner cylinder 221 is provided with an expansion sealing plug 225, the expansion sealing plug 225 is provided with a bolt pull rod 226, the other end of the bolt pull rod 226 extends to the other side of the support platform 223, one end of the air intake mechanism 42 is penetrated by the expansion sealing plug 225; one end of the bellows 6 is preliminarily guided and fixed by the fixed inner cylinder 221 in the sealing installation mechanism 22 The movable sleeve 222 on the support platform 223 is then sleeved on the outer end of the bellows 6, and then the bolt pulling rod 226 is rotated to cooperate with the support platform 223 to pull the diameter-expanding sealing plug 225, so that the diameter-expanding sealing plug 225 moves toward the inside of the fixed inner cylinder 221, and then through the effect of its enlarged diameter, the fixed inner cylinder 221 is supported outward from the inside, wherein the slot 224 opened on the fixed inner cylinder 221 enables the fixed inner cylinder 221 to be stretched open, and one end of the bellows is fixedly supported from the inside of the bellows 6, and the diameter-expanding sealing plug 225 is cooperated to seal the inside of one end of the bellows 6, so that the diameter-expanding sealing plug 225 cooperates with the fixed inner cylinder 221 and the movable sleeve 222 to achieve sealing and fixing of one end of the bellows 6, avoiding damage to one end of the bellows 6 by a single internal expansion fixation or an external locking fixation, and also achieving a better sealing effect.

[0035] Furthermore, the air supply mechanism 41 includes an air pump 411 and a connecting pipe 412. The air pump 411 is installed on one side of the sealing installation mechanism 22. The air outlet end of the air pump 411 is connected to one end of the air intake mechanism 42 through the connecting pipe 412. The air intake mechanism 42 includes an air intake push rod 421, an air intake plug rod 422, an air intake valve 423 and an air intake terminal 424. One end of the air intake plug rod 422 extends inside the expanded diameter sealing plug 225, and the other end of the air intake plug rod 422 is connected to the air intake terminal 424. The air intake terminal 424 is connected to the connecting pipe 412 through the air intake valve 423. The air intake push rod 421 is provided on one side of the bottom of the air terminal 424, and the air intake push rod 421 is fixed on the upper surface of the detection machine 1; air is supplied to one end of the bellows 6 through the air pump 411 and the connecting pipe 412 in the air supply mechanism 41. When in use, the air intake plug 422 is inserted into the expanded diameter sealing plug 225 through the air intake push rod 421 of the air intake mechanism 42, the air intake valve 423 on the air intake terminal 424 is opened, the air pump 411 is started, and air is filled into the bellows 6 through the connecting pipe 412. When the inflation process is completed, the output of the air pump 411 is stopped, and the air intake valve 423 is closed to prevent the air pump 411 from affecting the air tightness detection inside the bellows 6.

[0036] Furthermore, the movable support frame 3 includes a fixed support seat 31 and a movable support seat 32, the fixed support seat 31 is arranged close to one side of the sealing installation mechanism 22, and the movable support seat 32 is arranged on the other side of the fixed support seat 31; a restraining ring 33 is arranged above the movable support seat 32, and the restraining ring 33 is used to restrain the corrugated recessed part of the corrugated tube 6, and a corrugated support ring 34 is arranged above the fixed support seat 31, and the corrugated support ring 34 is composed of upper and lower parts engaged with each other, and a movable support rod 35 is arranged between the restraining ring 33 and the corrugated support ring 34, one end of the movable support rod 35 is fixedly connected to the restraining ring 33, and the other end of the movable support rod 35 is fixedly connected to the restraining ring 33, and the other end of the movable support rod 35 is fixedly connected to the The corrugated support ring 34 is slidably connected; the fixed support seat 31 in the movable support frame 3 cooperates with the movable support seat 32 to fix the end of the bellows 6 that needs to be compressed, wherein the restraining ring 33 above the movable support seat 32 fixes one end of the bellows 6, so that the restraining ring 33 is restrained in the corrugated depression of the bellows 6, and then the corrugated support ring 34 on the fixed support seat 31 fixes the other end of the bellows 6 that needs to be compressed, thereby making the compressed part of the bellows 6 in a tightly compressed and fixed state, and the bellows 6 in the compressed state is supported by the movable support rod 35 between the movable support seat 32 and the fixed support seat 31, so that the subsequent sealing mechanism 52 can enter the front end of the bellows 6 in the compressed state.

[0037] Furthermore, a guide block 321 is provided at the bottom of the movable support seat 32, a guide groove 11 is opened on the upper surface of the detection machine 1, the guide block 321 is slidably installed inside the guide groove 11, a ball screw 322 is provided inside the guide groove 11, and the guide block 321 is threadedly connected to the ball screw 322.

[0038] Furthermore, the sealing mechanism 52 includes a circular carrier plate 521, a sealing rubber pad 522 and a movable carrier plate 523. The circular carrier plate 521 is arranged in close contact with the center of the sealing rubber pad 522. The movable carrier plate 523 is located at the other side of the sealing rubber pad 522. A connecting sleeve 524 is arranged at the other side of the movable carrier plate 523.

[0039] When in use, the outer diameters of the circular carrier plate 521 and the movable carrier plate 523 are smaller than the minimum inner diameter of the bellows 6, so that the circular carrier plate 521 and the movable carrier plate 523 can enter the interior of the bellows 6, and the outer diameter of the sealing rubber pad 522 is larger than the minimum inner diameter of the bellows 6, so that the sealing rubber pad 522 can block the bellows 6;

[0040] The circular carrier plate 521 in the sealing mechanism 52 is driven by the driving mechanism 51 to move into the bellows 6. During the movement, the circular carrier plate 521 drives the sealing rubber pad 522 to move together. Since the outer diameter of the sealing rubber pad 522 is larger than the minimum inner diameter of the bellows 6, when the sealing rubber pad 522 moves into the bellows 6, the sealing rubber pad 522 is affected by the inner diameter of the bellows 6, and the sealing rubber pad 522 rolls in the opposite direction of the movement so as to better enter the bellows 6. At the same time, the driving mechanism 51 drives the connecting sleeve 524 to push the movable carrier plate 523 to move into the bellows 6 together with the circular carrier plate 521.

[0041] Further, the connecting sleeve 524 is sleeved on the output end of the driving mechanism 51, a limiting hole 525 is provided in the middle of the connecting sleeve 524, an elastic limiting block 526 is fixedly provided on the outer side of the fixed installation mechanism 21, the elastic limiting block 526 is adapted to the limiting hole 525, the connecting sleeve 524 moves toward the inside of the bellows 6, the limiting hole 525 moves toward the direction of the elastic limiting block 526, when the elastic limiting block 526 extends into the limiting hole 525, the movable carrier plate 523 stops at the position of the corrugated support ring 34; the connecting sleeve 524 is sleeved on the output end of the driving mechanism 51, When the driving mechanism 51 drives the circular carrier plate 521 to move toward the inside of the bellows 6, the movable carrier plate 523 moves with it. During the movement, when the limiting hole 525 on the connecting sleeve 524 moves to the elastic limiting block 526 on the outside of the fixed installation mechanism 21, the elastic limiting block 526 extends into the limiting hole 525 to fix the connecting sleeve 524, and then the connecting sleeve 524 is driven in the opposite direction by the driving mechanism 51. At this time, the connecting sleeve 524 is in a fixed state, and the driving mechanism 51 can only drive the circular carrier plate 521 and the sealing rubber pad 522 to move in the opposite direction, that is, the circular carrier plate 521 and the sealing rubber pad 522 move toward the direction of the movable carrier plate 523.

[0042] Furthermore, the driving mechanism 51 includes a driving push rod 511, which is arranged at one end of the outside of the fixed installation mechanism 21, and the output end of the driving push rod 511 passes through the movable carrier plate 523 and is connected to the circular carrier plate 521. A driving block 512 is arranged above the driving push rod 511, and the connecting sleeve 524 is sleeved on the outside of the driving push rod 511. A movable long groove 527 is opened on the connecting sleeve 524, and the driving block 512 is located inside the movable long groove 527; the circular carrier plate 521 and the sealing rubber pad 522 are driven to move by the driving push rod 511 in the driving mechanism 51. In the initial stage of the movement, the driving push rod 511 cooperates with the movable long groove 527 opened on the connecting sleeve 524 through the driving block 512 arranged above it, so that The driving push rod 511 can drive the connecting sleeve 524 to move together. When the driving mechanism 51 moves in the opposite direction, since the connecting sleeve 524 is in a fixed state at this time, the driving block 512 moves inside the movable long groove 527, and the circular carrier plate 521 pushes the sealing rubber pad 522 to move toward the movable carrier plate 523. Since the outer diameter of the sealing rubber pad 522 is larger than the minimum inner diameter of the bellows 6, the sealing rubber pad 522 rolls in the opposite direction until it contacts the movable carrier plate 523. At this time, the outer edge of the sealing rubber pad 522 is in a state of rolling toward the sealing installation mechanism 22 and contacts the inner wall of the bellows 6. When one end of the sealing installation mechanism 22 is inflated, the sealing rubber pad 522 will be further close to the inner wall of the bellows 6, thereby realizing the sealing treatment of the other end of the bellows 6.

[0043] A detection method for quality inspection of a corrugated pipe applies the air tightness detection device.

[0044] Working principle: When in use, the bellows 6 is fixedly installed through the fixed installation components 2 at both ends of the detection machine 1, the fixed installation mechanism 21 in the fixed installation component 2 is fixedly installed on one end of the bellows 6, and the sealing installation mechanism 22 is sealed to install the other end of the bellows 6, and the annular clamp 211 on the fixed installation mechanism 21 is fixedly installed on one end of the bellows 6, wherein the fixed clamp 212 cooperates with the movable clamp 213 to better insert one end of the bellows 6 into the annular clamp 211 for fixing, and then the movable clamp 213 is fixed by the locking button 214, so that the bellows 6 can be fixed on the annular clamp 211; the annular clamp 211 on the fixed installation mechanism 21 fixes the bellows 6 is fixedly installed, wherein the fixed card seat 212 cooperates with the movable card seat 213 to better insert one end of the bellows 6 into the annular clamp 211 for fixing, and then the movable card seat 213 is fixed by the locking button 214, so that the bellows 6 can be fixed on the annular clamp 211; then the air supply mechanism 41 is introduced into the end of the bellows 6 sealed installation through the air intake mechanism 42 in the booster assembly 4, and at this time, the mobile support frame 3 is used to compress and fix one end of the bellows 6, so that the end of the bellows 6 close to the sealing installation is in an extended state, so that each corrugation of the end of the bellows 6 close to the seal can be stretched, and it is difficult to perform airtight detection on the area between the corrugations in the compressed state, avoiding missed detection;

[0045] Then, the other end of the bellows 6 is sealed by the adjusting sealing assembly 5, and the driving mechanism 51 in the adjusting sealing assembly 5 drives the sealing mechanism 52 to extend into the bellows 6 until the front end of the bellows 6 is compressed, and the other end of the bellows 6 in the extended state is sealed. The outer diameters of the circular carrier plate 521 and the movable carrier plate 523 are smaller than the minimum inner diameter of the bellows 6, so that the circular carrier plate 521 and the movable carrier plate 523 can enter the bellows 6, and the outer diameter of the sealing rubber pad 522 is larger than the minimum inner diameter of the bellows 6, so that the sealing rubber pad 522 can block the bellows 6;

[0046] The circular carrier plate 521 in the sealing mechanism 52 is driven by the driving mechanism 51 to move into the interior of the bellows 6. When moving, the circular carrier plate 521 drives the sealing rubber pad 522 to move together. Since the outer diameter of the sealing rubber pad 522 is larger than the minimum inner diameter of the bellows 6, when the sealing rubber pad 522 moves into the interior of the bellows 6, the sealing rubber pad 522 is affected by the inner diameter of the bellows 6, and the sealing rubber pad 522 rolls in the opposite direction of the movement so as to better enter the bellows 6. At the same time, the driving mechanism 51 drives the connecting sleeve 524 to push the moving carrier plate 523 to move into the interior of the bellows 6 together with the circular carrier plate 521; the connecting sleeve 524 is sleeved on the driving mechanism 51. 1, when the driving mechanism 51 drives the circular carrier plate 521 to move inside the bellows 6, the movable carrier plate 523 moves with it. During the movement, when the limiting hole 525 on the connecting sleeve 524 moves to the elastic limiting block 526 outside the fixed installation mechanism 21, the elastic limiting block 526 extends into the limiting hole 525 to fix the connecting sleeve 524, and then the connecting sleeve 524 is driven in the opposite direction by the driving mechanism 51. At this time, the connecting sleeve 524 is in a fixed state, and the driving mechanism 51 can only drive the circular carrier plate 521 and the sealing rubber pad 522 to move in the opposite direction, that is, the circular carrier plate 521 and the sealing rubber pad 522 move in the direction of the movable carrier plate 523;

[0047] In the above process, the driving push rod 511 in the driving mechanism 51 drives the circular carrier plate 521 and the sealing rubber pad 522 to move. In the initial stage of the movement, the driving push rod 511 cooperates with the movable long groove 527 provided on the connecting sleeve 524 through the driving block 512 arranged above it, so that the driving push rod 511 can drive the connecting sleeve 524 to move together. When the driving mechanism 51 moves in the reverse direction, since the connecting sleeve 524 is in a fixed state at this time, the driving block 512 moves inside the movable long groove 527, and the circular carrier plate 521 pushes the sealing rubber pad 522. The sealing rubber pad 522 moves toward the moving carrier plate 523. Since the outer diameter of the sealing rubber pad 522 is larger than the minimum inner diameter of the bellows 6, the sealing rubber pad 522 is rolled in the opposite direction until it contacts the moving carrier plate 523. At this time, the outer edge of the sealing rubber pad 522 is rolled toward the sealing installation mechanism 22 and contacts the inner wall of the bellows 6. When one end of the sealing installation mechanism 22 is inflated, the sealing rubber pad 522 is further attached to the inner wall of the bellows 6, thereby achieving sealing of the other end of the bellows 6.

[0048] Then the air supply mechanism 41 inflates the inside of the extended bellows 6 to increase the internal air pressure, and then stops supplying air. The air pressure change inside the extended bellows 6 is detected by observing the air pressure detection instrument 43, so as to detect the air tightness of the bellows 6. Air is supplied to one end of the bellows 6 through the air pump 411 and the connecting pipe 412 in the air supply mechanism 41. When in use, the air intake plug 422 is inserted into the expanded diameter sealing plug 225 through the air intake push rod 421 of the air intake mechanism 42, the air intake valve 423 on the air intake terminal 424 is opened, the air pump 411 is started, and the air is filled into the bellows 6 through the connecting pipe 412. When the inflation process is completed, the output of the air pump 411 is stopped, and the air intake valve 423 is closed to prevent the air pump 411 from affecting the air tightness detection inside the bellows 6;

[0049] When the detection of the bellows 6 in the extended state is completed, the section is compressed to stretch the bellows 6 at the other end which is compressed, and fixed by the movable support frame 3; the fixed support seat 31 in the movable support frame 3 cooperates with the movable support seat 32 to fix the end of the bellows 6 that needs to be compressed, wherein the restraining ring 33 above the movable support seat 32 fixes one end of the bellows 6, so that the restraining ring 33 is restrained in the corrugated depression of the bellows 6, and then the corrugated support ring 34 on the fixed support seat 31 fixes the other end of the bellows 6 that needs to be compressed, so that the compressed part of the bellows 6 is in a tightly compressed and fixed state, and the bellows 6 in the compressed state is supported by the movable support rod 35 between the movable support seat 32 and the fixed support seat 31, so that the subsequent sealing mechanism 52 can enter the front end of the compressed bellows 6, and then the air tightness inside the section of the extended bellows 6 is detected by adjusting the sealing component 5 and the boosting component 4, so as to realize the overall air tightness detection of the bellows 6.

[0050] 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. An airtightness testing device, comprising a testing machine, characterized in that: Fixed mounting components are provided at both ends above the detection machine, a movable support frame is provided between the fixed mounting components, a bellows is located above the movable support frame, the fixed mounting component includes a fixed mounting mechanism and a sealing mounting mechanism, both ends of the bellows are respectively connected to the fixed mounting mechanism and the sealing mounting mechanism, a boosting component is provided on one side of the sealing mounting mechanism, the boosting component includes an air supply mechanism, an air intake mechanism and an air pressure detection instrument, the air supply mechanism is located on one side of the sealing mounting mechanism, the air supply mechanism is connected to the air intake mechanism, the air intake mechanism is located at the end of the sealing mounting mechanism, one end of the air intake mechanism extends inside the sealing mounting mechanism, and the air pressure detection instrument is installed on the air intake mechanism; an adjusting sealing component is provided at the end of the fixed mounting mechanism, the adjusting sealing component includes a driving mechanism and a sealing mechanism, the sealing mechanism is located inside the bellows, the driving mechanism is located at the end of the fixed mounting mechanism, and the other end of the driving mechanism is connected to the sealing mechanism; The movable support frame includes a fixed support seat and a movable support seat, wherein the fixed support seat is arranged close to one side of the sealing installation mechanism, and the movable support seat is arranged on the other side of the fixed support seat; a restraining ring is arranged above the movable support seat, and the restraining ring is used to restrain the corrugated concave part of the corrugated pipe, and a corrugated support ring is arranged above the fixed support seat, and the corrugated support ring is composed of upper and lower parts engaged with each other; The sealing mechanism comprises a circular carrier plate, a sealing rubber pad and a movable carrier plate. The circular carrier plate is arranged in close contact with the center of the sealing rubber pad. The movable carrier plate is located at the other side of the sealing rubber pad. A connecting sleeve is arranged on the other side of the movable carrier plate.

2. The airtightness detection device according to claim 1, characterized in that: An annular clamp is arranged above the fixed installation mechanism, and the annular clamp consists of a fixed clamping seat and a movable clamping seat. The fixed clamping seat is located above the fixed installation mechanism, and the movable clamping seat is movably installed above the fixed clamping seat. Locking buttons are arranged at both ends of the movable clamping seat and the fixed clamping seat.

3. The airtightness detection device according to claim 1, characterized in that: The sealing installation mechanism includes a fixed inner cylinder and a movable sleeve, a support platform is provided at one end of the fixed inner cylinder, the movable sleeve is movably installed on a side of the support platform away from the air intake mechanism, the movable sleeve is sleeved on the top of the fixed inner cylinder, a groove is provided on the circumference of the fixed inner cylinder, the inner diameter of the movable sleeve is gradually reduced from the outside to the inside, an expanding diameter sealing plug is provided inside the fixed inner cylinder, the expanding diameter sealing plug is provided with a bolt pulling rod, the other end of the bolt pulling rod extends to the other side of the support platform, and one end of the air intake mechanism passes through the expanding diameter sealing plug.

4. The airtightness detection device according to claim 3, characterized in that: The air supply mechanism includes an air pump and a connecting pipe. The air pump is installed on one side of the sealing installation mechanism, and the air outlet end of the air pump is connected to one end of the air intake mechanism through the connecting pipe; the air intake mechanism includes an air intake push rod, an air intake plug, an air intake valve and an air intake terminal. One end of the air intake plug extends into the interior of the expanded diameter sealing plug, and the other end of the air intake plug is connected to the air intake terminal. The air intake terminal is connected to the connecting pipe through the air intake valve. The air intake push rod is provided on one side of the bottom of the air intake terminal, and the air intake push rod is fixed to the upper surface of the detection machine.

5. The airtightness detection device according to claim 1, characterized in that: A movable support rod is arranged between the restraining ring and the corrugated support ring, one end of the movable support rod is fixedly connected to the restraining ring, and the other end of the movable support rod is slidably connected to the corrugated support ring.

6. The airtightness detection device according to claim 5, characterized in that: A guide block is provided at the bottom of the movable support seat, a guide groove is provided on the upper surface of the detection machine platform, the guide block is slidably installed inside the guide groove, a ball screw is provided inside the guide groove, and the guide block is threadedly connected to the ball screw.

7. The airtightness detection device according to claim 5, characterized in that: The connecting sleeve is sleeved on the output end of the driving mechanism, a limiting hole is arranged in the middle of the connecting sleeve, an elastic limiting block is fixedly arranged on the outer side of the fixed installation mechanism, the elastic limiting block is adapted to the limiting hole, the connecting sleeve moves toward the inside of the corrugated tube, the limiting hole moves toward the direction of the elastic limiting block, when the elastic limiting block extends into the limiting hole, the movable carrier plate stops at the position of the corrugated support ring.

8. The airtightness detection device according to claim 7, characterized in that: The driving mechanism includes a driving push rod, which is arranged at one end outside the fixed installation mechanism. The output end of the driving push rod passes through the movable carrier plate and is connected to the circular carrier plate. A driving block is arranged above the driving push rod. The connecting sleeve is sleeved on the outside of the driving push rod. A movable long groove is opened on the connecting sleeve, and the driving block is located inside the movable long groove.

9. A method for quality inspection of a corrugated pipe, characterized in that: An airtightness detection device as described in any one of claims 1 to 8 is used.

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