CN110987309A - Sealing detection system and method for underwater full-sealing device - Google Patents
Sealing detection system and method for underwater full-sealing device Download PDFInfo
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- CN110987309A CN110987309A CN201911353549.8A CN201911353549A CN110987309A CN 110987309 A CN110987309 A CN 110987309A CN 201911353549 A CN201911353549 A CN 201911353549A CN 110987309 A CN110987309 A CN 110987309A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
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Abstract
The sealing detection system for the underwater full-sealing device comprises a pressure cabin for accommodating the underwater full-sealing device, wherein a wire passing mechanism for a cable penetrating through the underwater full-sealing device is arranged on the pressure cabin, a drain valve communicated with the pressure cabin is connected to the pressure cabin, an air supply system and a water supply system communicated with the pressure cabin are connected to the pressure cabin, a pressure release valve is arranged on the pressure cabin, and a plurality of observation ports for observing the condition in the pressure cabin are arranged on the pressure cabin. The system can prevent water from entering the underwater full-sealing device during detection, and is favorable for preventing the circuit system of the underwater full-sealing device from being damaged by water inflow. The invention further provides a sealing detection method for the underwater full-sealing device.
Description
Technical Field
The invention relates to a sealing detection system for an underwater full-sealing device, and belongs to the technical field of watertight detection.
Background
The underwater full-sealing device is a device which continuously works underwater, and the device has higher requirement on sealing reliability. The joints of most underwater full-sealing devices are waterproof by adopting a vulcanization process, and the underwater full-sealing devices need to be subjected to watertight detection in the production process so as to meet the requirement on sealing reliability. And the sealing failure of the underwater full-sealing device is often caused by factors such as accidental damage, use environment influence, aging and the like in the use process of the underwater full-sealing device. After the seal fails, water may enter the circuit system, resulting in damage.
The conventional watertight detection method is mainly used for judging the leakage point of the water seal by naked eyes, and in the using process, after the seal fails, the leakage point can be judged by the naked eyes, and the loss is caused by the fact that water enters at the moment. And in most cases, it is difficult to judge the leak point even if the seal fails. In order to solve the problem of visual detection, the underwater full-sealing device is further placed into a hydraulic pressure kettle for testing to determine whether the underwater full-sealing device leaks. However, this method is to use water pressure to press water into the underwater sealed device for detection, and when the sealing fails, water enters the circuit system of the underwater sealed device, which causes much loss in the detection process. At present, no solution capable of effectively and nondestructively verifying the sealing reliability of the underwater full-sealing device exists in the prior art.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a sealing detection system for an underwater full-sealing device, which can prevent water from entering the underwater full-sealing device during detection and is beneficial to preventing a circuit system of the underwater full-sealing device from being damaged by water.
In order to achieve the purpose, the sealing detection system for the underwater full-sealing device comprises a pressure cabin for accommodating the underwater full-sealing device, wherein a wire passing mechanism for a cable passing through the underwater full-sealing device is arranged on the pressure cabin, the pressure cabin is connected with a drain valve communicated with the pressure cabin, the pressure cabin is connected with an air supply system and a water supply system communicated with the pressure cabin, a pressure release valve is arranged on the pressure cabin, and a plurality of observation ports for observing the condition in the pressure cabin are arranged on the pressure cabin.
Further, cross line mechanism including connecting the line cover of crossing on the pressure chamber lateral wall, cross and seted up convex through-hole on the axis of line cover, convex through-hole step bottom is equipped with first gasket, the one side that first gasket deviates from convex through-hole step bottom is equipped with the sealing washer, the one side that the sealing washer deviates from first gasket is equipped with the second gasket, the one side that the second gasket deviates from the sealing washer is equipped with lock nut, trompil on the axis of first gasket and second gasket, lock nut and convex through-hole threaded connection.
Further, first gasket and second gasket are run from opposite directions structure, first gasket and second gasket include respectively that four central angles are the sector column lamellar body of 90.
Furthermore, the sealing ring is a wire-passing sealing ring, an opening used for penetrating through the underwater full-sealing device is formed in the axis of the wire-passing sealing ring, the wire-passing sealing ring is of a single-opening structure or a split structure, and the wire-passing sealing ring comprises a pair of semi-cylindrical ring bodies or four fan-shaped cylindrical ring bodies with central angles of 90 degrees.
Furthermore, the wire-passing sealing ring is in clearance connection with the convex through hole, the fit clearance between the wire-passing sealing ring and the convex through hole is 0.1mm-0.2mm, the wire-passing sealing ring is in clearance connection with a cable of the underwater full-sealing device, the fit clearance between the wire-passing sealing ring and the cable of the underwater full-sealing device is 0.1mm-0.2mm, the first gasket is in clearance connection with the convex through hole, the second gasket is in clearance connection with the convex through hole, the fit clearance between the first gasket and the convex through hole, the fit clearance between the second gasket and the convex through hole is 0.2mm-0.3mm, and the first gasket is in clearance connection with the cable of the underwater full-sealing device, the second gasket is in clearance connection with the cable of the underwater full-sealing device, and the fit clearance between the first gasket and the cable of the underwater full-sealing device and the fit clearance between the second gasket and the cable of the underwater full-sealing device are 0.2mm-0.3 mm.
Furthermore, the sealing ring is a plug sealing ring, and the plug sealing ring seals the open holes of the first gasket and the second gasket.
Further, the air supply system comprises an air supply pressurizing device, a one-way valve and a first valve which are sequentially connected through a pipeline, the outlet end of the first valve is communicated with the pressure cabin through a pipeline, and an overflow reducing valve is further connected between the outlet end of the one-way valve and the inlet end of the first valve.
Further, the water supply system comprises a water supply pressurizing device, an overflow regulating valve and a second valve which are sequentially connected through a pipeline, the outlet end of the second valve is communicated with the pressure cabin through the pipeline, and the pressure relief valve is connected to the pipeline between the second valve and the pressure cabin.
The invention also provides a sealing detection method for the underwater full-sealing device, which comprises the following steps:
s1: putting the whole underwater full-sealing device to be detected into a pressure cabin;
s2: closing the wire passing mechanism by using a plug sealing ring, closing the pressure release valve, the second valve and the drain valve, opening the first valve, starting the gas supply and pressurization device to reenter gas into the pressure chamber, and closing the gas supply and pressurization device after the pressure in the pressure chamber reaches the set pressure and maintains the pressure for the set time;
s3: starting the water supply pressurizing device, adjusting the overflow regulating valve to enable the output water pressure of the water supply pressurizing device to be larger than the air pressure in the pressure chamber, opening the second valve to inject water into the pressure chamber to replace the compressed air in the pressure chamber, and enabling the compressed air in the pressure chamber to be discharged through the overflow reducing valve;
s4: observing the interior of the pressure cabin through the observation port, closing the second valve, the water supply pressurizing device and the first valve in sequence after the distance between the height of the water surface in the pressure cabin and the part to be detected of the underwater full-sealing device to be detected is larger than 100mm, and opening the pressure release valve to release the pressure of the pressure cabin;
s5: in the pressure relief process, whether continuity bubbles appear on the water surface in the pressure chamber is continuously observed through the observation port, when no bubbles appear on the water surface, the sealing performance of the underwater full-sealing device to be detected meets the requirement, and when the continuity bubbles appear on the water surface, the sealing performance of the underwater full-sealing device to be detected does not meet the requirement.
Further, in step S5, when continuous bubbles appear on the water surface, the drain valve is opened to drain the water in the pressure chamber, the plug sealing ring is replaced by the wire passing sealing ring, one end of the cable of the underwater totally enclosed device to be detected is mounted on the wire passing mechanism, then the steps S2-S4 are repeated, the cable of the underwater totally enclosed device to be detected is gradually pulled out in sections, and the detection process in the step S5 is repeated until the position of the leakage point is detected.
The sealing detection system for the underwater full-sealing device can prevent water from entering the underwater full-sealing device during detection, and is favorable for preventing a circuit system of the underwater full-sealing device from being damaged by water inflow.
Drawings
The present invention will be further described and illustrated with reference to the following drawings.
Fig. 1 is a schematic structural view of an integral device for underwater full-sealing according to a preferred embodiment of the invention;
FIG. 2 is a schematic structural diagram of a wire passing mechanism used in an underwater totally-enclosed device according to a preferred embodiment of the invention;
fig. 3 is a schematic structural diagram of a plug for use in an underwater full-sealing device according to a preferred embodiment of the invention.
Reference numerals: 1. a pressure chamber; 2. a viewing port; 3. a wire passing mechanism; 4. a drain valve; 5. threading the cable sleeve; 6. a male through hole; 7. a first gasket; 8. a wire-passing seal ring; 9. a plug sealing ring; 10. a second gasket; 11. locking the nut; 12. a gas supply pressurizing device; 13. a one-way valve; 14. an overflow relief valve; 15. a water supply pressurizing device; 16. an overflow regulating valve; 17. a pressure relief valve; 18. an underwater full-sealing device; 19. a second valve; 20. a first valve.
Detailed Description
The technical solution of the present invention will be more clearly and completely explained by the description of the preferred embodiments of the present invention with reference to the accompanying drawings.
As shown in fig. 1, a sealing detection system for an underwater full-sealing device 18 according to a preferred embodiment of the present invention includes a pressure chamber 1 for accommodating the underwater full-sealing device 18, a wire passing mechanism 3 for passing a cable of the underwater full-sealing device 18 is disposed on the pressure chamber 1, the wire passing mechanism 3 is detachable, and the underwater full-sealing device 18 can be conveniently put in or taken out after the wire passing mechanism 3 is detached. The pressure chamber 1 is connected with an air supply system and a water supply system which are communicated with the pressure chamber 1, the pressure chamber 1 is connected with a drain valve 4 which is communicated with the pressure chamber 1, the pressure chamber 1 is also provided with two observation ports 2 which are used for observing the conditions in the pressure chamber 1, and the two observation ports 2 are respectively positioned at two sides of the wire passing mechanism 3.
As shown in fig. 1, the gas supply system includes a gas supply pressurizing device 12, a check valve 13, an overflow pressure reducing valve 14 and a first valve 20, which are connected in sequence through a pipeline, an outlet end of the first valve 20 is communicated with the pressure chamber 1 through a pipeline, and the gas supply pressurizing device 12 can adopt a high-pressure gas source.
As shown in fig. 1, the water supply system includes a water supply pressurizing device 15, an overflow regulating valve 16 and a second valve 19 which are connected in sequence through a pipeline, an outlet end of the second valve 19 is communicated with the pressure chamber 1 through a pipeline, a pressure relief valve 17 is connected on the pipeline between the second valve 19 and the pressure chamber 1, and the water supply pressurizing device 15 can adopt a high-pressure water source.
As shown in fig. 1 and 2, the wire passing mechanism 3 includes a wire passing sleeve 5 connected to the side wall of the pressure chamber 1, and a convex through hole 6 is formed on the axis of the wire passing sleeve 5. The convex through hole 6 is provided with a first gasket 7, a sealing ring and a second gasket 10 from the bottom of the step to the top in sequence. One side of the second gasket 10 departing from the sealing ring is provided with a locking nut 11, the locking nut 11 is in threaded connection with the convex through hole 6, and the sealing ring can be extruded to realize sealing by screwing the locking nut 11.
As shown in fig. 1 and 2, the first gasket 7 and the second gasket 10 are split, that is, two semicircular cylinders are formed, and after being split, an annular gasket with a hole in the middle is formed. The first gasket 7 and the convex through hole 6, the second gasket 10 and the convex through hole 6, the first gasket 7 and the cable of the underwater full-sealing device 18 and the second gasket 10 and the cable of the underwater full-sealing device 18 are in clearance connection, and the fit clearance is 0.2mm-0.3 mm.
As shown in fig. 1 and 2, the sealing ring is a plug sealing ring 9 or a line-passing sealing ring 8. Referring to fig. 3, the plug sealing ring 9 is a disk-shaped integral rubber sealing ring, the plug sealing ring 9 is adopted when the underwater full-sealing device 18 performs integral detection, and the plug sealing ring 9 can seal the openings on the axes of the first gasket 7 and the second gasket 10, so that the wire passing mechanism 3 keeps sealed.
As shown in fig. 1 and 2, the wire-passing sealing ring 8 has a single-opening structure or a split structure, that is, two semicylinders or four fan-shaped cylinders with a central angle of 90 ° are manufactured, and the ring-shaped wire-passing sealing ring 8 with an opening in the middle is formed after splicing. The wire passing sealing ring 8 is adopted under the condition that the underwater full-sealing device 18 needs to be subjected to subsection detection, and a cable of the underwater full-sealing device 18 can pass through the first gasket 7, the wire passing sealing ring 8 and the second gasket 10, so that the cable can be pulled. The wire passing sealing ring 8 and the convex through hole 6 and the wire passing sealing ring 8 and the cable of the underwater full sealing device 18 are in clearance connection, and the fit clearance is 0.1mm-0.2 mm.
The sealing detection method for the underwater full-sealing device 18 in the preferred embodiment of the invention comprises the following steps:
s1: putting the whole underwater full-sealing device 18 to be detected into the pressure chamber 1;
s2: the plug sealing ring 9 is used for sealing the wire passing mechanism 3, the pressure relief valve 17, the second valve 19 and the drain valve 4 are closed, the first valve 20 is opened, the gas supply and pressurization device 12 is started to re-introduce gas into the pressure chamber 1, when the pressure in the pressure chamber 1 reaches the set pressure and maintains the pressure for the set time, the pressure maintaining time in the embodiment is 5min, and the gas supply and pressurization device 12 is closed;
s3: starting the water supply pressurizing device 15, adjusting the overflow regulating valve 16 to enable the output water pressure of the water supply pressurizing device 15 to be larger than the air pressure in the pressure chamber 1, opening the second valve 19 to inject water into the pressure chamber 1 to replace the compressed air in the pressure chamber 1, and enabling the compressed air in the pressure chamber 1 to be discharged through the overflow reducing valve 14;
s4: observing the pressure chamber 1 through the observation port 2, when the distance between the water level in the pressure chamber 1 and the part to be detected of the underwater full-sealing device 18 to be detected is larger than 100mm, closing the second valve 19, the water supply pressurizing device 15 and the first valve 20 in sequence, and slowly opening the pressure release valve 17 to gradually release the pressure of the pressure chamber 1;
s5: in the pressure relief process, whether continuous bubbles appear on the water surface in the pressure cabin 1 is continuously observed through the observation port 2, and when no bubbles appear on the water surface, the sealing performance of the underwater full-sealing device 18 to be detected meets the requirement, so that the detection process can be finished.
In step S5, when the bubbles are formed on the water surface, the sealing performance of the underwater full-sealing device 18 to be detected is not satisfactory, and the detection needs to be performed segment by using a segment detection method until a leak point is detected. At this time, the drain valve 4 is opened to drain the water in the pressure chamber 1, the plug sealing ring 9 is replaced by the wire passing sealing ring 8, one end of the cable of the underwater full-sealing device 18 to be detected is mounted on the wire passing mechanism 3, then the steps S2-S4 are repeated, the cable of the underwater full-sealing device 18 to be detected is gradually pulled out in a segmented manner, and the detection process in the step S5 is repeated until the position of a leakage point is detected.
The detection principle is as follows: when the sealing of the underwater full-sealing device 18 to be detected is good, air cannot be pressed into the underwater full-sealing device 18 to be detected, no air overflows from the underwater full-sealing device 18 to be detected during decompression, and no air bubbles overflow from the water surface. When the underwater full-sealing device 18 to be detected leaks, air is firstly pressed into the underwater full-sealing device 18 to be detected, the pressed air overflows from the underwater full-sealing device 18 to be detected during pressure reduction, continuous bubbles appear on the water surface, and a leakage point is conveniently found through the overflow part of the bubbles. And even if the underwater full-sealing device 18 to be detected leaks, water cannot enter the underwater full-sealing device 18 to be detected in the detection process, so that the circuit system of the underwater full-sealing device 18 to be detected is prevented from being damaged in the detection process.
The above detailed description merely describes preferred embodiments of the present invention and does not limit the scope of the invention. Without departing from the spirit and scope of the present invention, it should be understood that various changes, substitutions and alterations can be made herein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents. The scope of the invention is defined by the claims.
Claims (10)
1. The utility model provides a sealed detecting system for full sealing device under water, is including being used for holding the pressure chamber of full sealing device under water, its characterized in that, be equipped with the line mechanism of crossing that is used for passing the cable of full sealing device under water on the pressure chamber, be connected with the drain valve rather than the intercommunication on the pressure chamber, be connected with the air supply system and the water supply system rather than the intercommunication on the pressure chamber, be equipped with the relief valve on the pressure chamber, be equipped with a plurality of viewing apertures that are used for observing the interior condition of pressure chamber on the pressure chamber.
2. The sealing detection system for the underwater full-sealing device as claimed in claim 1, wherein the wire passing mechanism comprises a wire passing sleeve connected to a side wall of the pressure chamber, a convex through hole is formed in an axis of the wire passing sleeve, a first gasket is arranged at the step bottom of the convex through hole, a sealing ring is arranged on one surface of the first gasket, which is far away from the step bottom of the convex through hole, a second gasket is arranged on one surface of the sealing ring, which is far away from the first gasket, a locking nut is arranged on one surface of the second gasket, which is far away from the sealing ring, holes are formed in axes of the first gasket and the second gasket, and the locking nut is in threaded connection with the convex through hole.
3. The seal detection system for the underwater full seal device as claimed in claim 2, wherein the first gasket and the second gasket are of a split structure, and each of the first gasket and the second gasket comprises four fan-shaped cylindrical sheets with a central angle of 90 °.
4. The sealing detection system for the underwater full-sealing device as claimed in claim 3, wherein the sealing ring is a wire-passing sealing ring, an opening for passing through the underwater full-sealing device is formed in an axis of the wire-passing sealing ring, the wire-passing sealing ring is of a single-opening structure or a split-opening structure, and the wire-passing sealing ring comprises a pair of semi-cylindrical ring bodies or four fan-shaped cylindrical ring bodies with central angles of 90 °.
5. The sealing detection system for the underwater full-sealing device as claimed in claim 4, wherein the wire passing sealing ring is in clearance connection with the convex through hole, the fit clearance between the wire passing sealing ring and the convex through hole is 0.1mm-0.2mm, the wire passing sealing ring is in clearance connection with the cable of the underwater full-sealing device, the fit clearance between the wire passing sealing ring and the cable of the underwater full-sealing device is 0.1mm-0.2mm, the fit clearance between the first gasket and the convex through hole, the fit clearance between the second gasket and the convex through hole are in clearance connection, the fit clearance between the first gasket and the convex through hole, the fit clearance between the second gasket and the convex through hole are 0.2mm-0.3mm, the fit clearance between the first gasket and the cable of the underwater full-sealing device, and the clearance connection between the second gasket and the cable of the underwater full-sealing device, and the fit clearance between the first gasket and the cable of the underwater full-sealing device and the fit clearance between the second gasket and the cable of the underwater full-sealing device are 0.2-0.3 mm.
6. The seal detection system for the underwater full-sealing device as claimed in claim 3, wherein the sealing ring is a plug sealing ring, and the plug sealing ring seals the openings of the first gasket and the second gasket.
7. The seal detection system for the underwater full-sealing device according to claim 1, wherein the air supply system comprises an air supply pressurizing device, a one-way valve and a first valve which are sequentially connected through a pipeline, an outlet end of the first valve is communicated with the pressure chamber through a pipeline, and an overflow pressure reducing valve is further connected between an outlet end of the one-way valve and an inlet end of the first valve.
8. The seal detection system for the underwater full-sealing device according to claim 1, wherein the water supply system comprises a water supply pressurizing device, an overflow regulating valve and a second valve which are sequentially connected through a pipeline, an outlet end of the second valve is communicated with the pressure chamber through a pipeline, and the pressure relief valve is connected to the pipeline between the second valve and the pressure chamber.
9. A sealing detection method for an underwater full-sealing device is characterized by comprising the following steps:
s1: putting the whole underwater full-sealing device to be detected into a pressure cabin;
s2: closing the wire passing mechanism by using a plug sealing ring, closing the pressure release valve, the second valve and the drain valve, opening the first valve, starting the gas supply and pressurization device to reenter gas into the pressure chamber, and closing the gas supply and pressurization device after the pressure in the pressure chamber reaches the set pressure and maintains the pressure for the set time;
s3: starting the water supply pressurizing device, adjusting the overflow regulating valve to enable the output water pressure of the water supply pressurizing device to be larger than the air pressure in the pressure chamber, opening the second valve to inject water into the pressure chamber to replace the compressed air in the pressure chamber, and enabling the compressed air in the pressure chamber to be discharged through the overflow reducing valve;
s4: observing the interior of the pressure cabin through the observation port, closing the second valve, the water supply pressurizing device and the first valve in sequence after the distance between the height of the water surface in the pressure cabin and the part to be detected of the underwater full-sealing device to be detected is larger than 100mm, and opening the pressure release valve to release the pressure of the pressure cabin;
s5: in the pressure relief process, whether continuity bubbles appear on the water surface in the pressure chamber is continuously observed through the observation port, when no bubbles appear on the water surface, the sealing performance of the underwater full-sealing device to be detected meets the requirement, and when the continuity bubbles appear on the water surface, the sealing performance of the underwater full-sealing device to be detected does not meet the requirement.
10. The method as claimed in claim 9, wherein in step S5, when bubbles are formed on the water surface, the drain valve is opened to drain the water in the pressure chamber, the plug seal ring is replaced with a wire passing seal ring, one end of the cable of the tested underwater hermetically sealed device is mounted on the wire passing mechanism, and then the steps S2-S4 are repeated to gradually and sectionally pull out the cable of the tested underwater hermetically sealed device, and the testing process in step S5 is repeated until the position of the leakage point is checked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911353549.8A CN110987309B (en) | 2019-12-25 | 2019-12-25 | Sealing detection system and method for underwater full-sealing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911353549.8A CN110987309B (en) | 2019-12-25 | 2019-12-25 | Sealing detection system and method for underwater full-sealing device |
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| CN110987309A true CN110987309A (en) | 2020-04-10 |
| CN110987309B CN110987309B (en) | 2021-09-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111189590A (en) * | 2020-03-06 | 2020-05-22 | 长沙金信诺防务技术有限公司 | Sealing detection system and detection method of underwater full-sealing device |
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| CN1932464A (en) * | 2006-10-06 | 2007-03-21 | 成都飞机工业（集团）有限责任公司 | Airtight type tested pieces air-leakage detecting device |
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