CN219224052U - Stainless steel pool tube sheet welded joint leakage detection sealing device - Google Patents
Stainless steel pool tube sheet welded joint leakage detection sealing device Download PDFInfo
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- CN219224052U CN219224052U CN202223566349.0U CN202223566349U CN219224052U CN 219224052 U CN219224052 U CN 219224052U CN 202223566349 U CN202223566349 U CN 202223566349U CN 219224052 U CN219224052 U CN 219224052U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The utility model discloses a stainless steel pool tube plate welded joint leakage detection sealing device which comprises a pull plate, a pull rod, a sealing ring, an expansion plate, a clamping jaw, a plurality of positioning rods and a tensioning nut, wherein the pull plate is arranged on the pull rod; the pull rod is vertically fixed on the pull plate; the sealing ring is sleeved on the pull rod and is arranged on the pull plate; the expansion plate is provided with an expansion plate through hole; the expansion plate is sleeved on the pull rod through the expansion plate through hole and is arranged on the sealing ring; the claw is provided with a claw through hole; the clamping claw is sleeved on the pull rod through the clamping claw through hole and is positioned above the expansion plate; the upper end of the positioning rod is fixed with the clamping jaw, and the lower end of the positioning rod is fixed on the expansion plate; the upper end of the pull rod is provided with external threads, and the tensioning nut is in threaded connection with the upper end of the pull rod and is positioned above the clamping jaw; and the tensioning nut is screwed down, the pull rod and the pull plate move towards the clamping jaw along with the tensioning nut, and the sealing ring is extruded to expand outwards. The utility model has the advantages of good sealing effect, high detection efficiency, convenience and the like.
Description
Technical Field
The utility model belongs to the technical field of nondestructive testing in nuclear power construction sites, relates to a device for testing, and particularly relates to a sealing device for testing leakage of a welded joint of a tube plate of a stainless steel pool.
Background
At present, a large number of stainless steel pools are designed in nuclear power and military nuclear power engineering construction projects for storing boric acid water, so that the shielding of nuclear radioactive substances, the cooling of spent fuel and the like are realized. The stainless steel pool belongs to the nuclear quality assurance QA1 level and the nuclear safety SC level, the requirements on the welding seam level of the stainless steel pool cladding are high, and 100% nondestructive detection and vacuum leakage detection are needed after the welding is completed. The vacuum leakage detection comprises a vacuum system, a vacuum cover, a vacuum meter, a gas release valve, a pipeline system and the like, wherein foaming solution is uniformly coated on the surface of a detected welding line during leakage detection, then the vacuum cover is covered on the detected welding line to form a sealed area, the vacuum system pumps out gas in the sealed area in the vacuum cover to form a certain internal and external pressure difference, whether the welding line leaks or not is judged by observing whether the foaming phenomenon of the solution exists on the detected welding line, and the vacuum leakage detection is the most visual detection method for detecting whether the welding line has a penetrating defect or not.
In order to realize the function of the stainless steel pool, a plurality of groups of connecting pipes are designed in the pool for detecting the water quality, the water temperature, the water filling and draining water and the like in the pool, and a large number of tube plate welding joints are required to be welded in each pool. Because of the complicated trend of the welded structure and the on-site pipeline, the implementation of vacuum leakage detection of the weld joint of the tube plate joint is difficult, and when the plugging of the tube outlet is difficult, visual detection and liquid permeation detection can only be generally carried out for replacement, so that the quality of the weld joint of the tube plate welded joint is uncertain. At present, the stainless steel pool of the in-service nuclear power station has the condition that part of tube plate welded joints are permeated, so that a great deal of effort is required for checking and overhauling, the overhauling preparation working period is long, great cost is required, a great deal of labor is consumed, and meanwhile, the construction quality, the engineering period, the cost and the like are greatly influenced.
Disclosure of Invention
The utility model aims to solve the problems of the existing nuclear power station stainless steel pool tube plate joint that the preparation work period is long, the detection result is not visual, non-ideal, the detection quality is unreliable and the like. The sealing device can rapidly and reliably realize the sealing of the tube plate welded joint tube ends, can realize efficient, rapid and convenient vacuum leakage detection operation by being matched with vacuum leakage detection equipment, has visual and reliable detection results, ensures the detection quality of the stainless steel pool tube plate welded joint, saves labor, and has simple and convenient operation, high reliability and good stability.
In order to achieve the above object, the present utility model provides a stainless steel pool tube plate welded joint leakage detection sealing device, which has the following characteristics: comprises a pulling plate, a pull rod, a sealing ring, an expansion plate, a claw, a plurality of positioning rods and a tensioning nut; the pull rod is vertically fixed on the pull plate; the sealing ring is sleeved on the pull rod and is arranged on the pull plate; the expansion plate is provided with an expansion plate through hole; the expansion plate is sleeved on the pull rod through the expansion plate through hole and is arranged on the sealing ring; the claw is provided with a claw through hole; the clamping claw is sleeved on the pull rod through the clamping claw through hole and is positioned above the expansion plate; the upper end of the positioning rod is fixed with the clamping jaw, and the lower end of the positioning rod is fixed on the expansion plate; the upper end of the pull rod is provided with external threads, and the tensioning nut is in threaded connection with the upper end of the pull rod and is positioned above the clamping jaw; and the tensioning nut is screwed down, the pull rod and the pull plate move towards the clamping jaw along with the tensioning nut, and the sealing ring is extruded to expand outwards.
Further, the utility model provides a stainless steel pool tube plate welded joint leakage detection sealing device, which can also have the following characteristics: wherein, a plurality of locating rods are evenly distributed around the pull rod.
Further, the utility model provides a stainless steel pool tube plate welded joint leakage detection sealing device, which can also have the following characteristics: wherein, the upper end of the positioning rod is provided with external threads; each positioning rod is provided with a group of positioning nuts, and each group of positioning nuts comprises a lower nut and an upper nut; the lower nut and the upper nut are in threaded connection with the upper ends of the corresponding positioning rods, the lower nut is located below the clamping jaw, the upper nut is located above the clamping jaw, and the positioning rods are fixed with the clamping jaw through the lower nut and the upper nut.
Further, the utility model provides a stainless steel pool tube plate welded joint leakage detection sealing device, which can also have the following characteristics: wherein the expansion plate is a circular plate; and the lower end of the expansion plate is conical and smoothly transits to the upper edge.
Further, the utility model provides a stainless steel pool tube plate welded joint leakage detection sealing device, which can also have the following characteristics: wherein the sealing ring is sleeved outside the conical surface of the expansion plate.
Further, the utility model provides a stainless steel pool tube plate welded joint leakage detection sealing device, which can also have the following characteristics: the clamping jaw is of a multi-jaw structure with three or more clamping jaws, and the clamping jaws are uniformly distributed; the number of the positioning rods is equal to that of the clamping claw supporting claws and corresponds to that of the clamping claw supporting claws one by one, and the positioning rods are respectively fixed with the corresponding supporting claws.
Further, the utility model provides a stainless steel pool tube plate welded joint leakage detection sealing device, which can also have the following characteristics: the clamping jaw is of a cross-shaped structure with four clamping jaws; the number of the positioning rods is four, and the positioning rods are respectively fixed with four claws of the claw.
Further, the utility model provides a stainless steel pool tube plate welded joint leakage detection sealing device, which can also have the following characteristics: wherein, the jack catch through hole is located the center of jack catch.
Further, the utility model provides a stainless steel pool tube plate welded joint leakage detection sealing device, which can also have the following characteristics: wherein, the expansion plate through hole is positioned at the center of the expansion plate.
Further, the utility model provides a stainless steel pool tube plate welded joint leakage detection sealing device, which can also have the following characteristics: the pull plate is circular, and the bottom end of the pull rod is fixed at the center of the pull plate.
The utility model has the beneficial effects that: the utility model provides a leakage detection sealing device for a welded joint of a tube plate of a stainless steel pool. The sealing device realizes sealing operation by tightly clamping and extruding the sealing ring to expand and deform and tightly attach to the inside of the steel pipe, is simple to operate and convenient to use, and has adjustable space size of a sealing area, so that the vacuumizing speed during leakage detection is ensured, and the leakage detection working efficiency is improved. Under the abominable environment of on-the-spot comparison construction condition restriction, this device has reduced pond vacuum leak testing's work load greatly, has simplified the construction process greatly, has reduced personnel's input, can be convenient, reliable, the high-efficient sealing of going on tube sheet welded joint, guarantees weld quality, saves the manual work, easy and simple to handle, and the reliability is high, stability is good, and engineering quality is more guaranteed.
Drawings
FIG. 1 is a schematic structural view of a stainless steel pool tube sheet welded joint leak detection seal;
FIG. 2 is a structural exploded view of a stainless steel pool tube sheet welded joint leak detection seal;
FIG. 3 is a schematic sealing diagram of a stainless steel pool tube sheet welded joint leak detection seal;
FIG. 4 is a schematic view of a stainless steel pool tube sheet welded joint leak detection seal;
FIG. 5 is a schematic illustration of a stainless steel pool tube sheet weld joint leak detection seal detecting a tube sheet weld joint on a stainless steel pool keel;
FIG. 6 is a schematic illustration of a stainless steel pool tube sheet welded joint leak detection seal to achieve different seal zones.
Detailed Description
Specific embodiments of the present utility model are described below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the utility model provides a stainless steel pool tube plate welded joint leakage detection sealing device, which comprises a pull plate 1, a pull rod 2, a sealing ring 3, an expansion plate 4, a claw 5, a plurality of positioning rods 6 and a tensioning nut 7.
The pull rod 2 is vertically fixed on the pull plate 1. Specifically, the pull plate 1 is circular, and the bottom end of the pull rod 2 is fixed at the center of the pull plate 1.
The sealing ring 3 is sleeved on the pull rod 2 and is arranged on the pull plate 1.
The center of the expansion plate 4 is provided with an expansion plate through hole. The expansion plate 4 is sleeved on the pull rod 2 through the expansion plate through hole and is arranged on the sealing ring 3.
The center of the claw 5 has a claw through hole. The claw 5 is sleeved on the pull rod 2 through the claw through hole and is positioned above the expansion plate 4.
The upper end of the positioning rod 6 is fixed with the claw 5, and the lower end is fixed on the expansion plate 4. The positioning rods 6 are uniformly distributed around the pull rod 2. Specifically, the upper end of the positioning rod 6 has an external thread. Each positioning rod 6 is provided with a set of positioning nuts 61, each set of positioning nuts 61 comprising a lower nut and an upper nut. The lower nut and the upper nut are in threaded connection with the upper ends of the corresponding positioning rods 6, the lower nut is located below the clamping jaws 5, the upper nut is located above the clamping jaws 5, and the positioning rods 6 are fixed with the clamping jaws 5 through the lower nut and the upper nut.
The upper end of the pull rod 2 is provided with external threads, and a tensioning nut 7 is in threaded connection with the upper end of the pull rod 2 and is positioned above the clamping jaw 5. After the clamping jaws 5 are placed, the tensioning nuts 7 are screwed, the pull rod 2 and the pull plate 1 move towards the clamping jaws 5, and the sealing ring 3 is extruded and expanded outwards.
Preferably, the expansion plate 4 is a circular plate, the lower end of the expansion plate 4 is in a conical shape, the conical section is used for expanding the sealing ring 3, and the straight section of the upper edge is used for compressing the sealing ring 3, so that good sealing is ensured. The sealing ring 3 is sleeved outside the conical surface of the expansion plate 4. The sealing ring 3 adopts a circular section sealing ring 3, and the elasticity is good. In order to ensure the stainless steel surface and avoid pollution, the sealing ring 3 is made of a material which does not contain halogen elements and controls sulfur S elements, for example: silicone rubber, and the like.
The claw 5 has a multi-claw structure with three or more claws to ensure the stability of the support. The outer ends of the supporting claws are bent downwards to form claw shapes, and the supporting claws are uniformly distributed. For simple operation and reliable support, the four-jaw or three-jaw structure is preferably selected. The number of the positioning rods 6 is equal to that of the claws 5, and the positioning rods 6 are in one-to-one correspondence with the corresponding claws, so that the stable and reliable support is ensured. In this embodiment, the claw 5 has a cross-shaped structure with four claws. The number of the positioning rods 6 is four, and the positioning rods are respectively fixed with four claws of the claw 5.
Wherein the jaws 5 are used for positioning and fixing the sealing means. The positioning rod 6 is used for positioning and supporting the expansion plate 4, supporting and maintaining the distance between the clamping jaw 5 and the expansion plate 4, and guaranteeing the expansion tight sealing position of the sealing ring 3. As shown in fig. 3, the pull plate 1 and the expansion plate 4 are matched to clamp the sealing ring 3, and the sealing ring 3 is compressed and supported in the moving process of the pull plate 1, so that the sealing ring 3 is forced to deform and expand. The conical surface of the expansion plate 4 is matched with the sealing ring 3, and the sealing ring 3 expands along the conical surface of the expansion plate 4 and is tightly attached to the inside of the steel pipe A when being stressed (extruded), so that the sealing performance of one side of the steel pipe of the welded joint of the tube plate is ensured. The tensioning nut 7 is in threaded connection with the pull rod 2, and when the tensioning nut 7 is screwed, the pull rod 2 drives the pull plate 1 to move upwards to compress the sealing ring 3. When the tensioning nut 7 is loosened, the pulling plate 1 moves downwards, and the sealing ring 3 is loosened. The positioning nut 61 is used in cooperation with the positioning rod 6 and is used for guaranteeing the position of the expansion plate 4, and accordingly, the relative position of the positioning rod 6 on the clamping jaw 5 can be adjusted through adjusting the positioning nut 61, so that the positions of the expansion plate 4 and the sealing ring 3 are adjusted, and the size of a sealing area is adjusted.
When the tube plate welding device is used, as shown in fig. 4, the clamping jaw 5 is arranged at the end part (above the detected welding line B) of the tube plate welding joint, the pull plate 1, the sealing ring 3 and the expansion plate 4 are all extended into a pipeline below the detected welding line, then the tensioning nut 7 is screwed down, the pull rod 2 and the pull plate 1 move towards the clamping jaw 5 along with the tensioning nut, and the sealing ring 3 is extruded by the fixed expansion plate 4 and the pull plate 1 moving towards the clamping jaw 5, so that the pipeline is expanded outwards and sealed. When the tensioning nut 7 is screwed down, the sealing ring 3 is already arranged on the pulling plate 1, and friction exists between the sealing ring and the pulling plate, so that the pulling rod 2 and the pulling plate 1 cannot idle along with the tensioning nut 7, but move towards the clamping jaw 5, and the possibility of idle along with the tensioning nut 7 can be thoroughly avoided by holding the upper end of the pulling rod 2 by hands. In addition, the expansion plate 4, the sealing ring 3 and the pulling plate 1 are matched to the pipeline in size.
The sealing device, the vacuum system C1 and the vacuum cover C2 form a vacuum leakage detection loop system, and the surface of the detected welding line B is uniformly coated with a layer of foaming solution before detection. And then judging the quality of the welding line by observing the foaming state of the foaming solution on the surface of the welding line under the internal and external pressure difference. The pressure in the sealing area of the sealing device and the vacuum cover C2 is regulated by a vacuum system, and specifically, the pressure difference between the pressure in the sealing area of the sealing device and the vacuum cover C2 and the ambient atmospheric pressure is more than 0.4x10 5 And (3) maintaining the pressure for at least 20 seconds above Pa, and observing the foaming solution state of the surface of the welding line. After the detection is finished, the atmospheric pressure in the vacuum cover C2 is recovered through the pressure relief valve, and the solution on the surface of the welding line is cleaned, so that the whole detection process is finished.
In a specific embodiment, as shown in fig. 5, the claw 5 is fixed at the end of a tube plate welding joint on a keel of a stainless steel pool, the sealing ring 3 is compressed and deformed to seal the end of the tube plate welding joint, foaming solution is uniformly coated on the surface of a detected welding line B, then a vacuum cover is covered on the detected welding line to form a sealed area, and the vacuum system pumps out gas in the sealed area of the vacuum cover to form a certain internal and external pressure difference.
As shown in fig. 6, by adjusting the position distance of the positioning nut 61 on the positioning rod 6, the relative position of the positioning rod 6 to the claw 5 is adjusted, so that the position of the expansion plate 4 is adjusted, and the size of the sealing area is adjusted. In fig. 6, the left seal area is small and the right seal area is large.
The device can seal the pipe ends of the pipe plate welded joint according to the complex environment of a construction site, reduces the carding work and the plugging work of the on-site pipeline, detects the whole pipe plate welded joint at one time, reduces the construction process and improves the vacuum detection efficiency; the operation is simple, and the labor is saved; and the equipment has light weight, is convenient to move, can be recycled for a long time, and has more guaranteed detection quality.
Claims (10)
1. The utility model provides a stainless steel pond tube sheet welded joint leak detection sealing device which characterized in that:
comprises a pulling plate, a pull rod, a sealing ring, an expansion plate, a claw, a plurality of positioning rods and a tensioning nut;
the pull rod is vertically fixed on the pull plate;
the sealing ring is sleeved on the pull rod and is arranged on the pull plate;
the expansion plate is provided with an expansion plate through hole; the expansion plate is sleeved on the pull rod through the expansion plate through hole and is arranged on the sealing ring;
the claw is provided with a claw through hole; the clamping claw is sleeved on the pull rod through the clamping claw through hole and is positioned above the expansion plate;
the upper end of the positioning rod is fixed with the clamping jaw, and the lower end of the positioning rod is fixed on the expansion plate;
the upper end of the pull rod is provided with external threads, and the tensioning nut is in threaded connection with the upper end of the pull rod and is positioned above the clamping jaw; and the tensioning nut is screwed down, the pull rod and the pull plate move towards the clamping jaw along with the tensioning nut, and the sealing ring is extruded to expand outwards.
2. The stainless steel pool tube sheet welded joint leak detection seal of claim 1, wherein:
wherein, a plurality of locating rods are evenly distributed around the pull rod.
3. The stainless steel pool tube sheet welded joint leak detection seal of claim 1, wherein:
wherein, the upper end of the positioning rod is provided with external threads;
each positioning rod is provided with a group of positioning nuts, and each group of positioning nuts comprises a lower nut and an upper nut; the lower nut and the upper nut are in threaded connection with the upper ends of the corresponding positioning rods, the lower nut is located below the clamping jaw, the upper nut is located above the clamping jaw, and the positioning rods are fixed with the clamping jaw through the lower nut and the upper nut.
4. The stainless steel pool tube sheet welded joint leak detection seal of claim 1, wherein:
wherein the expansion plate is a circular plate; and the lower end of the expansion plate is conical and smoothly transits to the upper edge.
5. The stainless steel pool tube sheet welded joint leak detection seal of claim 4, wherein:
wherein the sealing ring is sleeved outside the conical surface of the expansion plate.
6. The stainless steel pool tube sheet welded joint leak detection seal of claim 1, wherein:
the clamping jaw is of a multi-jaw structure with three or more clamping jaws, and the clamping jaws are uniformly distributed;
the number of the positioning rods is equal to that of the clamping claw supporting claws and corresponds to that of the clamping claw supporting claws one by one, and the positioning rods are respectively fixed with the corresponding supporting claws.
7. The stainless steel pool tube sheet welded joint leak detection seal of claim 6, wherein:
the clamping jaw is of a cross-shaped structure with four clamping jaws;
the number of the positioning rods is four, and the positioning rods are respectively fixed with four claws of the claw.
8. The stainless steel pool tube sheet welded joint leak detection seal of claim 1, wherein:
wherein, the jack catch through hole is located the center of jack catch.
9. The stainless steel pool tube sheet welded joint leak detection seal of claim 1, wherein:
wherein, the expansion plate through hole is positioned at the center of the expansion plate.
10. The stainless steel pool tube sheet welded joint leak detection seal of claim 1, wherein:
the pull plate is circular, and the bottom end of the pull rod is fixed at the center of the pull plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223566349.0U CN219224052U (en) | 2022-12-30 | 2022-12-30 | Stainless steel pool tube sheet welded joint leakage detection sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223566349.0U CN219224052U (en) | 2022-12-30 | 2022-12-30 | Stainless steel pool tube sheet welded joint leakage detection sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219224052U true CN219224052U (en) | 2023-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223566349.0U Active CN219224052U (en) | 2022-12-30 | 2022-12-30 | Stainless steel pool tube sheet welded joint leakage detection sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219224052U (en) |
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2022
- 2022-12-30 CN CN202223566349.0U patent/CN219224052U/en active Active
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