CN220170456U

CN220170456U - Local leak detection device

Info

Publication number: CN220170456U
Application number: CN202320943996.4U
Authority: CN
Inventors: 林琦武; 麻晓毅; 张应均; 杨丰源; 朱智强
Original assignee: Guangzhou Know How Industry & Equipment Co ltd
Current assignee: Guangzhou Know How Industry & Equipment Co ltd
Priority date: 2023-04-23
Filing date: 2023-04-23
Publication date: 2023-12-12
Anticipated expiration: 2033-04-23

Abstract

The utility model provides a local leak detection device, comprising: base, clamp plate, lifting unit and leak hunting subassembly. The base is provided with a sampling port; the pressing plate is arranged above the sampling port of the base; the lifting assembly drives the pressing plate to lift; the bottom of the pressing plate is provided with a sealing part which is matched with the shape of the gearbox shell; the leak detection assembly comprises a leak detector, an inflation connector, a translation driving assembly, a helium source and an exhaust valve; the leak detector is connected with the sampling port, the inflation connector is movably arranged on the base, the translation driving assembly is arranged on the base, and the helium source and the exhaust valve are connected with the inflation connector. The local leak detection device can perform local leak detection on the oil path channel of the gearbox shell of the automobile engine, realizes accurate leak detection by detecting the content of helium through the leak detector, effectively avoids the situation of false leak detection, improves leak detection efficiency, and has simple structure and convenient operation.

Description

Local leak detection device

Technical Field

The utility model relates to the technical field of leakage detection, in particular to a local leakage detection device.

Background

If the oil path of the gearbox shell of the automobile engine leaks, the oil dripping phenomenon can be caused, so that the engine oil quantity of the automobile engine is reduced, and the automobile engine is disordered and pollutes the air. At present, a water test method is generally adopted in the leakage detection mode of an automobile engine gearbox shell, an engine gearbox shell oil way channel is filled with air with certain pressure and then soaked in water, whether the leakage condition exists in the engine gearbox shell oil way channel is judged by observing whether bubbles exist in the water, and the engine gearbox shell is generally an aluminum cast shell, and often belongs to leakage, the leakage quantity is small and slow, so that the problems of possible false leakage detection, limited detection visual field, low detection efficiency and the like exist in the water test method.

Disclosure of Invention

The utility model aims to overcome the defects and shortcomings in the prior art and provides a local leak detection device.

One embodiment of the present utility model provides a local leak detection apparatus comprising: base, clamp plate, lifting unit and leak hunting subassembly.

The base is provided with a sampling port;

the pressing plate is arranged above the base, the lifting assembly is in transmission connection with the pressing plate, and a sealing part matched with the shape of the gearbox shell is formed at the bottom of the pressing plate;

the leak detection assembly comprises a leak detector, an inflation connector, a translation driving assembly, a helium source and an exhaust valve; the leak detector is connected with the sampling port, the inflation connector is movably arranged on the base, the translation driving assembly is arranged on the base and is in transmission connection with the inflation connector and used for driving the inflation connector to be close to or far away from the gearbox shell, and the helium source and the exhaust valve are connected with the inflation connector.

Compared with the prior art, the local leak detection device can perform local leak detection on the oil path channel of the gearbox shell of the automobile engine, realizes accurate leak detection by detecting the content of helium through the leak detector, effectively avoids the situation of false leak detection, improves the leak detection efficiency, does not need to adopt a vacuum box for helium detection, and has simple structure and convenient operation. In addition, because the sealing requirements of other positions of the gearbox shell are different from those of the oil path, whether leakage exists in a relatively specific area of the oil path can be detected independently in a local sealing mode, and the phenomenon that the detection result of the sealing of the oil path is influenced due to the leakage of other positions of the gearbox shell when the vacuum box helium is detected is avoided, so that the condition that qualified products are scrapped is avoided.

In some alternative embodiments, the leak detection assembly includes a plurality of the inflation fittings and a plurality of the translational drive assemblies, the translational drive assemblies being drivingly connected to at least one inflation fitting, the plurality of inflation fittings being in communication with one another.

In some optional embodiments, a guide sliding rail is arranged on the base, the leak detection assembly further comprises a sliding seat slidably arranged on the guide sliding rail, the inflation connector is arranged on the sliding seat, the translation driving assembly is in transmission connection with the sliding seat, and the inflation connector is made to be close to or far away from the gearbox shell by driving the sliding seat to move along the guide sliding rail.

In some alternative embodiments, the translation driving component is a translation cylinder, and an output end of the translation driving component is in transmission connection with the sliding seat.

In some alternative embodiments, a sampling column is provided on the base, and at least one sampling port is provided on a side surface of the sampling column.

In some alternative embodiments, the bottom of the pressure plate is provided with a gasket disposed around the seal.

In some alternative embodiments, the sealing part is provided with a plurality of pressing blocks, and a plurality of elastic pieces are connected between the pressing blocks and the sealing part.

In some optional embodiments, the sealing part is provided with a plurality of guide rods, the pressing block is slidably arranged on the guide rods and can be lifted along the guide rods, the elastic piece is a spring, and two ends of the elastic piece are respectively connected with the pressing block and the sealing part and are sleeved on the outer sides of the guide rods.

In some alternative embodiments, the base is provided with a plurality of guide posts disposed around the platen, and the platen is in sliding engagement with the guide posts.

In some optional embodiments, the base is provided with a plurality of support columns, a plurality of support columns are provided with top plates, the lifting component is a lifting cylinder, the lifting component is arranged on the top plates, and an output shaft of the lifting component is connected with the pressing plate.

In order that the utility model may be more clearly understood, specific embodiments thereof will be described below with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic diagram of a portion of the structure of a local leak detection apparatus in accordance with one embodiment of the utility model;

fig. 2 is an enlarged view at a shown in fig. 1;

FIG. 3 is a schematic diagram of one side of a partial structure of a partial leak detection apparatus in accordance with one embodiment of the utility model;

fig. 4 is an enlarged view at B shown in fig. 3;

FIG. 5 is a schematic diagram of the gas paths of a leak detector, vent valve, helium source, and local leak detection chamber according to one embodiment of the utility model;

FIG. 6 is a schematic illustration of a portion of the structure of a partial leak detection apparatus and the structure of a transmission housing in accordance with one embodiment of the utility model;

FIG. 7 is a cross-sectional view of a portion of the structure of a local leak detection apparatus in accordance with one embodiment of the utility model;

fig. 8 is an enlarged view at C shown in fig. 7.

Reference numerals illustrate:

10. a base; 11. a sampling port; 12. a guide rail; 13. a sampling column; 14. a guide post; 15. a support column; 16. a top plate; 20. a pressing plate; 21. a sealing part; 22. a sealing gasket; 23. briquetting; 24. an elastic member; 25. a guide rod; 30. a lifting assembly; 40. a leak detector; 41. an inflation joint; 42. a translational drive assembly; 43. a helium source; 44. an exhaust valve; 45. a sliding seat; 50. a gearbox housing; 51. a local leak detection chamber.

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. In the description of the present utility model, unless otherwise indicated, the meaning of "plurality" is 2 or more, and the meaning of "several" is 1 or more. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated unless otherwise indicated.

Referring to fig. 1, a schematic structural diagram of a part of a local leak detection apparatus according to an embodiment of the utility model includes: base 10, platen 20, lift assembly 30, and leak detection assembly.

Referring to fig. 2 to 8, fig. 2 is an enlarged view of a portion of the structure of the partial leak detection apparatus of the embodiment of the present utility model shown in fig. 1, fig. 3 is a schematic view of a structure of a portion of the partial leak detection apparatus shown in fig. 3, fig. 4 is an enlarged view of a portion of the structure of the leak detection apparatus shown in fig. 3, fig. 5 is a schematic view of a gas path of the leak detector, the vent valve, the helium gas source and the partial leak detection chamber of the embodiment of the present utility model, fig. 6 is a schematic view of a portion of the structure of the partial leak detection apparatus and a transmission case of the embodiment of the present utility model, fig. 7 is a sectional view of a portion of the structure of the partial leak detection apparatus of the embodiment of the present utility model shown in fig. 7, fig. 8 is an enlarged view of a portion of the structure of the partial leak detection apparatus shown in fig. 7, and a sampling port 11 is provided in a base 10; the pressing plate 20 is arranged above the base 10, the lifting assembly 30 is in transmission connection with the pressing plate 20 and drives the pressing plate 20 to lift, and a sealing part 21 which is matched with the shape of the gearbox housing 50 is formed at the bottom of the pressing plate 20; leak detection assembly includes leak detector 40, gas fitting 41, translational drive assembly 42, helium source 43, and vent valve 44; leak detector 40 is connected to sampling port 11, inflation connector 41 is movably disposed on base 10, translation drive assembly 42 is disposed on base 10 and is drivingly connected to inflation connector 41 for driving inflation connector 41 toward or away from the port of the oil passage in gearbox housing 50, and helium source 43 and vent valve 44 are both connected to inflation connector 41. Before detection, placing the gearbox housing 50 on the base 10, driving the pressing plate 20 to descend by the lifting assembly 30, pressing the gearbox housing 50 to the base 10 by the pressing plate 20, blocking a first port of the oil path, sealing a to-be-detected area on the gearbox housing 50 by the sealing part 21, forming a local leakage detection cavity 51 by the sealing part 21 and the to-be-detected area of the gearbox housing 50, and communicating the sampling port 11 with the local leakage detection cavity 51; since the side of the transmission housing 50 also has a second port to the oil passage, the translational drive assembly 42 drives the charge fitting 41 to communicate with the second port of the oil passage, thereby causing the charge fitting 41 to communicate with the oil passage. During detection, the exhaust valve 44 is closed, helium is filled into the oil path through the helium source 43, the leak detector 40 is communicated into the local leak detection chamber 51 through the sampling port 11, the content of helium in the local leak detection chamber 51 can be detected, the content of helium in the local leak detection chamber 51 is continuously detected through the leak detector 40, and if a helium signal is detected in the local leak detection chamber 51, the fact that the helium leaks from the oil path to the detection chamber, namely, the oil path has a leak point relative to a to-be-detected area of the gearbox housing 50 is indicated. Because the connection part of the gearbox housing oil path 50 and the local leakage detection chamber 51 is usually cast by aluminum, the leakage point is usually positioned at the casting connection position, the leakage point is usually a small crack, the water detection can hardly pass through the crack or the speed of passing through the crack is very slow, the leakage phenomenon is not obvious and the efficiency is low, the helium penetrability is strong, the helium leakage content in the local leakage detection chamber 51 can be detected in time easily through the small crack, the change of the helium leakage content can clearly and intuitively know whether the leakage point exists, and the detection efficiency is high. And only the partial structure of the gearbox shell is sealed, a vacuum box is not needed, and the structure is simple and the operation is convenient. In addition, the helium detection of the vacuum box generally carries out helium detection on the whole gearbox shell, when leakage exists in other positions of the gearbox shell, the accuracy of a sealing detection result of a relatively local area of an oil path channel can be affected, even if a qualified product is scrapped, the local leakage detection can be carried out on the position to be detected independently in a local sealing mode, the leakage detection is not needed on an irrelevant position, the leakage of the irrelevant position is prevented from affecting the leakage detection result, and therefore false detection is avoided, and the detection accuracy can be improved.

After the detection is completed, the exhaust valve 44 is opened, and helium is discharged from the oil path.

In some embodiments, the leak detection assembly includes a plurality of pneumatic connectors 41 and a plurality of translational drive assemblies 42, the translational drive assemblies 42 being in driving communication with at least one pneumatic connector 41, the plurality of pneumatic connectors 41 being in communication with each other, the plurality of pneumatic connectors 41 being in one-to-one correspondence with the plurality of ports in the side of the transmission housing 50, thereby facilitating the formation of a sealed local leak detection chamber 51.

In order to improve the sealing property, an annular seal ring is provided on the outer side of the air-filled joint 41, and the seal ring abuts against the port inner wall of the transmission case 50 to improve the sealing property.

To improve the stability of movement of the inflation connector 41, in some alternative embodiments, the base 10 is provided with a guide rail 12, the leak detection assembly further includes a sliding seat 45 slidably disposed on the guide rail 12, the inflation connector 41 is disposed on the sliding seat 45, and the translation driving assembly 42 is in driving connection with the sliding seat 45, and drives the inflation connector 41 to move along the guide rail by driving the sliding seat 45 to approach or separate from the transmission housing 50. The guide rail 12 may be appropriately designed according to practical needs, for example, the guide rail 12 may be a convex rail, and the sliding seat 45 is provided with a sliding groove matched with the guide rail 12. When the leak detection assembly comprises a plurality of inflation connectors 41 and a plurality of translation driving assemblies 42, the base 10 is provided with a plurality of guide sliding rails 12, the leak detection assembly comprises a plurality of sliding seats 45, the sliding seats 45 are in sliding fit with at least one sliding rail, at least one inflation connector 41 is arranged on the sliding seats 45, and the translation driving assemblies 42 are in one-to-one transmission fit with the sliding seats 45. In this embodiment, the leak detection assembly includes two sliding seats 45, the sliding seats 45 are slidably matched with two guide rails, one sliding seat 45 is provided with an inflation connector 41, and the other sliding seat 45 is provided with two inflation connectors 41.

The specific structure of the translation driving assembly 42 can be designed according to practical needs, for example, the translation driving assembly 42 can be a screw driving assembly, a rotary motor translation driving assembly 42, a belt translation driving assembly 42 or a linear motor translation driving assembly 42, etc. In this embodiment, the translation driving assembly 42 is a translation cylinder, and an output end thereof is in transmission connection with the sliding seat 45.

In some alternative embodiments, the base 10 is provided with a sampling post 13, and the side of the sampling post 13 is provided with at least one sampling port 11. The transmission housing 50 is provided with a through hole, the sampling column 13 passes through the through hole and extends into the local leak detection chamber 51, and the sampling port 11 is positioned in the local leak detection chamber 51. In the present embodiment, the side face of the sampling column 13 is provided with a plurality of sampling ports 11, and the plurality of sampling ports 11 are arranged around the sampling column 13.

In some alternative embodiments, the bottom of the platen 20 is provided with a gasket 22 disposed around the seal 21, the gasket 22 abutting against the transmission housing 50, thereby improving the sealing of the local leak detection chamber 51.

In some alternative embodiments, the seal portion 21 is provided with a plurality of pressing blocks 23, a plurality of elastic members 24 are connected between the pressing blocks 23 and the seal portion 21, when the pressing blocks 23 are pressed against the gearbox housing 50, the elastic members 24 generate elastic deformation, the elastic force of the elastic members 24 can enable the pressing blocks 23 to press the gearbox housing 50 on the base 10, when helium is filled into an oil path of the gearbox housing, the pressure plate 20 can be pushed to move upwards and the gearbox housing 50 can be pushed to deviate, through the design of the elastic members 24 and the pressing blocks 23, even if the pressing plates 20 displace, the elastic force of the elastic members 24 can be utilized, the pressing blocks 23 can press the gearbox housing 50, looseness of the gearbox housing 50 is avoided, and further mutual deviation of the seal portion 21 and the gearbox housing 50 is avoided.

The structure of the elastic piece 24 can select proper design according to actual needs, for example, in some optional embodiments, a plurality of guide rods 25 are arranged on the sealing portion 21, the pressing block 23 is slidably arranged on the guide rods 25 through guide holes arranged on the pressing block 23, the pressing block 23 can be lifted along the guide rods 25, the elastic piece 24 is a spring, two ends of the elastic piece 24 are respectively connected with the pressing block 23 and the sealing portion 21, the elastic piece 24 is sleeved on the outer side of the guide rods 25, the guide rods 25 can improve the structural stability of the elastic piece 24 and are not easy to deviate from positions, and stable movement of the pressing block 23 is also facilitated.

In some alternative embodiments, the base 10 is provided with a plurality of guide posts 14 disposed around the pressing plate 20, and the pressing plate 20 is slidably engaged with the guide posts 14, so that the pressing plate 20 can stably lift and lower without being easily deviated from an angle.

The specific structure of the lifting assembly 30 may be designed according to practical needs, for example, in some alternative embodiments, a plurality of support columns 15 are provided on the base 10, a top plate 16 is provided on the plurality of support columns 15, the lifting assembly 30 is a lifting cylinder, and the lifting assembly 30 is provided on the top plate 16, and an output shaft thereof is connected with the pressing plate 20.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A local leak detection apparatus, comprising: the device comprises a base, a pressing plate, a lifting assembly and a leakage detection assembly;

the base is provided with a sampling port;

2. A local leak detection apparatus as defined in claim 1, wherein: the leak detection assembly comprises a plurality of inflation joints and a plurality of translation driving assemblies, wherein the translation driving assemblies are connected with at least one inflation joint in series, and the inflation joints are mutually communicated.

3. A local leak detection apparatus as defined in claim 1, wherein: the base is provided with a guide sliding rail, the leak detection assembly further comprises a sliding seat of the guide sliding rail, the inflation connector is arranged on the sliding seat, the translation driving assembly is in transmission connection with the sliding seat, and the inflation connector is close to or far away from the gearbox shell by driving the sliding seat to move along the guide sliding rail.

4. A local leak detection apparatus as defined in claim 3, wherein: the translation driving assembly is a translation cylinder, and the output end of the translation driving assembly is in transmission connection with the sliding seat.

5. A local leak detection apparatus as defined in any one of claims 1 to 4, wherein: the base is provided with a sampling column, and the side face of the sampling column is provided with at least one sampling port.

6. A local leak detection apparatus as defined in any one of claims 1 to 4, wherein: the bottom of the pressing plate is provided with a sealing gasket arranged around the sealing part.

7. A local leak detection apparatus as defined in any one of claims 1 to 4, wherein: the sealing part is provided with a plurality of pressing blocks, and a plurality of elastic pieces are connected between the pressing blocks and the sealing part.

8. A local leak detection apparatus as defined in claim 7, wherein: the sealing part is provided with a plurality of guide rods, the pressing block is arranged on the guide rods in a sliding manner and can be lifted along the guide rods, the elastic piece is a spring, and two ends of the elastic piece are respectively connected with the pressing block and the sealing part and are sleeved on the outer sides of the guide rods.

9. A local leak detection apparatus as defined in any one of claims 1 to 4, wherein: the base is provided with a plurality of guide posts which are arranged around the pressing plate, and the pressing plate is in sliding fit with the guide posts.

10. A local leak detection apparatus as defined in any one of claims 1 to 4, wherein: the base is provided with a plurality of support columns, a plurality of the support columns are provided with top plates, the lifting component is a lifting cylinder and is arranged on the top plates, and an output shaft of the lifting component is connected with the pressing plate.