CN220120329U

CN220120329U - Detection mechanism for air tightness of shell

Info

Publication number: CN220120329U
Application number: CN202321694287.3U
Authority: CN
Inventors: 谢强
Original assignee: Suzhou Huazhicheng Precision Work Technology Co ltd
Current assignee: Suzhou Huazhicheng Precision Work Technology Co ltd
Priority date: 2023-06-30
Filing date: 2023-06-30
Publication date: 2023-12-01
Anticipated expiration: 2033-06-30

Abstract

The utility model provides a detection mechanism for shell air tightness, which comprises a base, wherein a lower detection component is arranged on the base, a bracket is arranged on the base, an upper detection component is arranged on the bracket, a vacuumizing and helium supplying component is arranged at the bottom of the base, a side sealing component is arranged on the base and is used for extending into the lower detection component to seal a shell side hole, the shell is placed into the lower detection component, then the upper detection component and the lower detection component are closed, the upper detection component is matched with the lower detection component to extrude the shell, and then the side sealing component is used for extending into the lower detection component to seal the shell side hole; the vacuumizing and helium supplying assembly vacuumizes a gap between the upper detecting assembly and the lower detecting assembly; and vacuumizing gaps of the product and the lower detection assembly, simultaneously injecting helium into the gaps between the product and the lower detection assembly, detecting whether the helium between the product and the lower detection assembly leaks into the gaps between the upper detection assembly and the lower detection assembly, and judging whether the welding part of the shell is seamless.

Description

Detection mechanism for air tightness of shell

Technical Field

The utility model relates to the technical field of air tightness detection equipment, in particular to a detection mechanism for air tightness of a shell.

Background

And (3) testing the air tightness of the device. The air tightness test is mainly to test whether each connecting part of the container has leakage phenomenon, and the air tightness test is necessary for the pressure container with extremely high toxicity degree of the medium or with little leakage allowed by design.

Especially, the welding is adopted between the shell and the connecting flange, and the welding part often has errors due to welding, so that a leakage opening is easily formed at the welding part between the shell and the connecting flange, but the leakage opening cannot be detected by human eyes, and the scanner cannot detect the leakage opening due to the difference of flatness of the welding part.

Disclosure of Invention

The utility model aims to provide a detection mechanism for the air tightness of a shell, which overcomes the defects in the prior art.

In order to solve the technical problems, the technical scheme of the utility model is as follows: the utility model provides a detection mechanism of casing gas tightness, includes the base, is provided with down detection component on the base, is provided with the support on the base, is provided with detection component on the support, and the base bottom is provided with evacuation and supplies helium subassembly, is provided with side seal assembly on the base, and side seal assembly is used for stretching into in the detection component in order to seal casing side hole down.

In the scheme, the shell is placed into the lower detection assembly, then the upper detection assembly and the lower detection assembly are closed, the upper detection assembly is matched with the lower detection assembly to extrude the shell, and then the side sealing assembly is used for extending into the lower detection assembly to seal a side hole of the shell; the vacuumizing and helium supplying assembly vacuumizes a gap between the upper detecting assembly and the lower detecting assembly; and vacuumizing a gap between the product and the lower detection assembly, and simultaneously injecting helium into the gap between the product and the lower detection assembly, so as to detect whether the helium between the product and the lower detection assembly leaks into the gap between the upper detection assembly and the lower detection assembly, thereby judging whether the welding part of the shell is seamless.

As an improvement of a detection mechanism for the air tightness of a shell, the lower detection assembly comprises a bearing block and a detection sensor, wherein the bearing block is provided with a first groove, a second groove is arranged in the first groove, the second groove is matched with the shell and the shape of a connecting flange, a supporting block is arranged in the second groove, the supporting block is used for supporting the shell, a first vacuumizing hole and a helium supply hole are formed in the supporting block, a second vacuumizing hole is formed in the first groove, and the detection sensor is installed in the first groove.

In the above scheme, specifically, the casing is placed on the supporting shoe, be formed with the gap between casing and the supporting shoe, the edge and the recess second bottom contact of casing, detect the subassembly and detect the subassembly is closed down when going up, go up the cooperation of detecting the subassembly and detect the subassembly extrusion casing down, then the side seal assembly is used for stretching into in the lower detection subassembly in order to seal casing side hole, form two inclosed spaces between casing and the recess first, when through the evacuation hole earlier evacuation in the casing then through supplying helium hole injection helium, detect recess two through the detection sensor and leak helium, if detect that there is helium in the recess first in the detection sensor, then indicate that there is the leak in the casing welding place, if detect that there is helium in the recess first in the detection sensor, then indicate that the casing welding place does not have the leak, thereby judge whether the casing welding place is leak-free.

As an improvement of a detection mechanism for the air tightness of a shell, the upper detection assembly comprises a first cylinder, a cover plate and an extrusion block, wherein a cylinder body of the first cylinder is fixedly connected with a bracket, a working end of the first cylinder is fixedly connected with the cover plate, a groove III is formed in the bottom of the cover plate, the extrusion block is arranged in the groove III of the cover plate, and the extrusion block is provided with a groove IV which is matched with the shapes of the shell and a connecting flange.

In the scheme, the principle of the upper detection assembly is that the first air cylinder pushes the cover plate to move downwards, the cover plate and the bearing block are closed, the third groove and the first groove form a closed cavity, the second vacuumizing hole vacuumizes the cavity, the edge of the extrusion block extrudes the edge of the shell, the fourth groove of the extrusion block is attached to the surface of the shell, and the extrusion block is matched with the bearing block to fix the shell.

The utility model relates to an improvement of a shell air tightness detection mechanism, which also comprises a side sealing mechanism, wherein the side sealing mechanism comprises a sliding rail, a connecting block, a second cylinder, a sealing plug head and a sealing rod, wherein the second cylinder and the sliding rail are arranged on a base, the connecting block is fixedly connected with the working end of the second cylinder, the connecting block is in sliding connection with the sliding rail, the connecting block is fixedly connected with the sealing plug head, the sealing plug head is fixedly connected with the sealing rod, the sealing rod is in sliding connection with a bearing block, a through hole for the sealing rod to penetrate is formed in an extrusion block, the sealing plug head is used for sealing the bearing block, and one end of the sealing rod is used for sealing a side hole of the shell.

In the above scheme, after apron and carrier block closure, drive two drive connecting blocks are along the slide rail slip, and the connecting block drives sealed chock plug and sealing rod and seals along the side opening department of carrier block towards the casing, when sealed chock plug and carrier block lateral wall contact, indicates that sealing rod has accomplished sealing operation to the side opening of casing.

As an improvement of a detection mechanism of the shell air tightness, the vacuumizing and helium supplying assembly comprises a vacuumizing machine, a helium filling machine and an electromagnetic valve for controlling opening and closing, wherein the vacuumizing machine is communicated with a vacuumizing hole I on a supporting block and a vacuumizing hole II on a groove I through a pipeline, the helium filling machine is communicated with a helium supplying hole on the supporting block through a pipeline, and the electromagnetic valve is arranged on the pipeline.

In the scheme, the principle of the vacuumizing and helium supplying component is that the vacuumizing machine is communicated with the vacuumizing hole I and the vacuumizing hole II of the groove I on the supporting block through the pipeline, then air in a cavity formed by the groove III of the cover plate and the groove I of the bearing block is pumped away, and meanwhile air in the space in the shell, the groove II and the supporting block is pumped away. The helium injecting machine is communicated with the helium supply hole through a pipeline and the electromagnetic valve, and injects helium into the shell, the second groove and the space in the supporting block.

Compared with the prior art, the utility model has the beneficial effects that: placing the shell into a lower detection assembly, closing the upper detection assembly and the lower detection assembly, extruding the shell by the upper detection assembly and the lower detection assembly, and then extending a side sealing assembly into the lower detection assembly to seal a side hole of the shell; the vacuumizing and helium supplying assembly vacuumizes a gap between the upper detecting assembly and the lower detecting assembly; and vacuumizing a gap between the product and the lower detection assembly, and simultaneously injecting helium into the gap between the product and the lower detection assembly, so as to detect whether the helium between the product and the lower detection assembly leaks into the gap between the upper detection assembly and the lower detection assembly, thereby judging whether the welding part of the shell is seamless.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.

FIG. 1 is a schematic diagram of a first embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of the present utility model after removal of the bracket and cylinder one;

FIG. 3 is a schematic diagram of a lower detecting assembly according to the present utility model;

FIG. 4 is a schematic diagram of the upper detecting assembly of the present utility model;

fig. 5 is a schematic diagram of the operation of the evacuation and helium supply assembly.

1, a base; 2. a lower detection assembly; 21. a bearing block; 22. a detection sensor; 23. a groove I; 24. a second groove; 25. a support block; 3. a bracket; 4. an upper detection assembly; 41. a first cylinder; 42. a cover plate; 43. extruding a block; 44. a groove III; 45. a groove IV; 5. a vacuum pumping and helium supplying assembly; 51. a vacuum extractor; 52. helium filling machine; 53. an electromagnetic valve; 6. a side seal assembly; 61. a slide rail; 62. a connecting block; 63. a second cylinder; 64. a sealing plug; 65. a sealing rod; 7. vacuumizing the first hole; 8. a helium supply hole; 9. and vacuumizing the second hole.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 5, a detection mechanism for air tightness of a shell comprises a base 1, a lower detection component is arranged on the base 1, a support 3 is arranged on the base 1, an upper detection component 4 is arranged on the support 3, a vacuumizing and helium supplying component 5 is arranged at the bottom of the base 1, a side sealing component 6 is arranged on the base 1, and the side sealing component 6 is used for extending into the lower detection component to seal a side hole of the shell.

Placing the shell into a lower detection assembly, closing an upper detection assembly 4 and the lower detection assembly, extruding the shell by the upper detection assembly 4 matched with the lower detection assembly, and then extending a side sealing assembly 6 into the lower detection assembly to seal a side hole of the shell; the vacuumizing and helium supplying assembly 5 vacuumizes the gap between the upper detecting assembly 4 and the lower detecting assembly; and vacuumizing a gap between the product and the lower detection assembly, and simultaneously injecting helium into the gap between the product and the lower detection assembly, so as to detect whether the helium between the product and the lower detection assembly leaks into the gap between the upper detection assembly 4 and the lower detection assembly, thereby judging whether the welding part of the shell is free of leaks.

The lower detection assembly comprises a bearing block 21 and a detection sensor 22, wherein the bearing block 21 is provided with a first groove 23, a second groove 24 is formed in the first groove 23, the second groove 24 is matched with the shell and the connecting flange in shape, a supporting block 25 is arranged in the second groove 24, the supporting block 25 is used for supporting the shell, a first vacuumizing hole 7 and a helium supply hole 8 are formed in the supporting block 25, a second vacuumizing hole 9 is formed in the first groove 23, and the detection sensor 22 is installed in the first groove 23.

Specifically, the shell is placed on the supporting block 25, a gap is formed between the shell and the supporting block 25, the edge of the shell is contacted with the bottom of the groove two 24, when the upper detecting component 4 and the lower detecting component are closed, the upper detecting component 4 is matched with the lower detecting component to extrude the shell, then the side sealing component 6 is used for extending into the lower detecting component to seal the side hole of the shell, two airtight spaces are formed between the shell and the groove one 23, when the first vacuumizing hole 7 is used for vacuumizing the shell and then helium is injected into the shell through the helium supplying hole 8, the second detecting sensor 22 is used for detecting that the second groove 24 leaks helium into the groove one 23, if the detecting sensor 22 detects that the first groove 23 has helium, the welding position of the shell has a leak, if the detecting sensor 22 cannot detect that the first groove 23 has helium, the welding position of the shell is seamless, and accordingly whether the welding position of the shell is seamless is judged.

The upper detection assembly 4 comprises a first cylinder 41, a cover plate 42 and an extrusion block 43, wherein a cylinder body of the first cylinder 41 is fixedly connected with the bracket 3, a working end of the first cylinder 41 is fixedly connected with the cover plate 42, a groove III 44 is formed in the bottom of the cover plate 42, the extrusion block 43 is arranged in the groove III 44 of the cover plate 42, and the extrusion block 43 is provided with a groove IV 45 which is matched with the shape of the shell and the connecting flange.

The principle of the upper detection assembly 4 is that the first cylinder 41 pushes the cover plate 42 to move downwards, the cover plate 42 and the bearing block 21 are closed, the third groove 44 and the first groove 23 form a closed cavity, the second vacuumizing hole 9 vacuumizes the cavity, the edge of the extrusion block 43 extrudes the edge of the shell, the fourth groove 45 of the extrusion block 43 is attached to the surface of the shell, and the extrusion block 43 is matched with the bearing block 21 to fix the shell.

The side sealing mechanism comprises a sliding rail 61, a connecting block 62, a second cylinder 63, a sealing plug 64 and a sealing rod 65, wherein the second cylinder 63 and the sliding rail 61 are arranged on the base 1, the connecting block 62 is fixedly connected with the working end of the second cylinder 63, the connecting block 62 is slidably connected with the sliding rail 61, the connecting block 62 is fixedly connected with the sealing plug 64, the sealing plug 64 is fixedly connected with the sealing rod 65, the sealing rod 65 is slidably connected with the bearing block 21, the extrusion block 43 is provided with a through hole for the penetration of the sealing rod 65, the sealing plug 64 is used for sealing the bearing block 21, and one end of the sealing rod 65 is used for sealing a side hole of the shell.

After the cover plate 42 and the bearing block 21 are closed, the two driving connection blocks 62 are driven to slide along the sliding rail 61, the connection blocks 62 drive the sealing plug head 64 and the sealing rod 65 to seal along the side hole of the bearing block 21 towards the shell, and when the sealing plug head 64 contacts with the side wall of the bearing block 21, the sealing rod 65 finishes sealing operation on the side hole of the shell.

The vacuumizing and helium supplying assembly 5 comprises a vacuumizing machine 51, a helium injecting machine 52 and an electromagnetic valve 53 for controlling opening and closing, wherein the vacuumizing machine 51 is communicated with a vacuumizing hole 7 on the supporting block 25 and a vacuumizing hole 9 of the groove I23 through pipelines, the helium injecting machine 52 is communicated with a helium supplying hole 8 on the supporting block 25 through pipelines, and the electromagnetic valve 53 is arranged on the pipelines.

The principle of the vacuum pumping and helium supplying assembly 5 is that the vacuum pumping machine 51 is communicated with the vacuum pumping hole 7 on the supporting block 25 and the vacuum pumping hole 9 on the groove one 23 through the electromagnetic valve 53, then the air in the cavity formed by the groove three 44 of the cover plate 42 and the groove one 23 of the bearing block 21 is pumped away, and the air in the space in the shell, the groove two 24 and the supporting block 25 is pumped away. Helium injector 52 communicates with helium supply hole 8 via a pipeline and solenoid valve 53, helium injector 52 injects helium into the space in housing and groove two 24 and support block 25.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. The utility model provides a detection mechanism of casing gas tightness, includes the base, its characterized in that is provided with down detection component on the base, is provided with the support on the base, is provided with detection component on the support, and the base bottom is provided with evacuation and supplies helium subassembly, is provided with side seal assembly on the base, and side seal assembly is used for stretching into in the detection component in order to seal casing side hole down.

2. The detecting mechanism for the air tightness of the shell according to claim 1, wherein the lower detecting component comprises a bearing block and a detecting sensor, the bearing block is provided with a first groove, a second groove is formed in the first groove, the second groove is matched with the shell and the connecting flange in shape, a supporting block is arranged in the second groove and used for supporting the shell, a first vacuumizing hole and a helium supplying hole are formed in the supporting block, a second vacuumizing hole is formed in the first groove, and the detecting sensor is installed in the first groove.

3. The detecting mechanism for air tightness of a shell according to claim 1, wherein the upper detecting component comprises a first cylinder, a cover plate and an extrusion block, wherein a cylinder body of the first cylinder is fixedly connected with the bracket, a working end of the first cylinder is fixedly connected with the cover plate, a groove III is formed in the bottom of the cover plate, the extrusion block is arranged in the groove III of the cover plate, and the extrusion block is provided with a groove IV which is matched with the shapes of the shell and the connecting flange.

4. The detection mechanism of the air tightness of the shell according to claim 1, further comprising a side sealing mechanism, wherein the side sealing mechanism comprises a sliding rail, a connecting block, a second cylinder, a sealing plug and a sealing rod, the second cylinder and the sliding rail are arranged on the base, the connecting block is fixedly connected with the working end of the second cylinder, the connecting block is slidably connected with the sliding rail, the connecting block is fixedly connected with the sealing plug, the sealing plug is fixedly connected with the sealing rod, the sealing rod is slidably connected with the bearing block, the extruding block is provided with a through hole for the sealing rod to penetrate, the sealing plug is used for sealing the bearing block, and one end of the sealing rod is used for sealing a side hole of the shell.

5. The mechanism for detecting air tightness of a shell according to claim 1, wherein the vacuumizing and helium supplying component comprises a vacuumizing machine, a helium injecting machine and an electromagnetic valve for controlling opening and closing, the vacuumizing machine is communicated with the vacuumizing hole I on the supporting block and the vacuumizing hole II on the groove I through pipelines, the helium injecting machine is communicated with the helium supplying hole on the supporting block through pipelines, and the electromagnetic valve is arranged on the pipelines.