CN213017675U - Nuclear fuel assembly guide pipe water hole sealing device and guide pipe sealing welding device - Google Patents
Nuclear fuel assembly guide pipe water hole sealing device and guide pipe sealing welding device Download PDFInfo
- Publication number
- CN213017675U CN213017675U CN202021127002.4U CN202021127002U CN213017675U CN 213017675 U CN213017675 U CN 213017675U CN 202021127002 U CN202021127002 U CN 202021127002U CN 213017675 U CN213017675 U CN 213017675U
- Authority
- CN
- China
- Prior art keywords
- sealing
- clamping shaft
- guide pipe
- fuel assembly
- nuclear fuel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The utility model relates to a nuclear fuel assembly stand pipe flow water hole sealing device and stand pipe seal welding device, include: the sealing mechanism comprises a transmission mechanism, a supporting mechanism and a sealing mechanism, wherein the supporting mechanism supports the transmission mechanism and the sealing mechanism, and the transmission mechanism compresses the sealing mechanism. The utility model provides a discharge orifice sealing device extrudees the sealing washer at supporting shoe both ends through power unit cylinder drive clamping shaft, receives extruded sealing washer and produces and warp, and the pipe outer wall in lip and the passageway closely laminates to the realization is to the sealed of pipe flow water hole part. The problem of the shielding gas consumption that non-sealing TIG welding process exists big, production efficiency is low, power consumptive many and the short-lived defect of electrode is solved, the utility model provides a sealing device leakproofness is good, the manufacturing low price, and the cost is controllable.
Description
Technical Field
The utility model relates to a sealing device technical field, concretely relates to nuclear fuel assembly stand pipe flow water hole sealing device and stand pipe seal welding device.
Background
The guide pipe is a core structure component of the fuel assembly, bears the load of the fuel assembly during operation in the reactor, provides an insertion channel for various related assemblies, and ensures that the control rod assembly can be smoothly inserted into the reactor core in emergency. The novel nuclear fuel assembly guide pipe part is composed of an integrated end plug, an inner pipe and an outer pipe, the material is zirconium alloy, and the three are connected through welding.
At present, the guide pipe part in the industry is generally welded by adopting non-sealing inert gas shielded welding (TIG), the end plug and the pipe are put into a welding chamber, and the welding is finished under the dynamic protection of the constant-current inert gas. In order to purify the welding atmosphere and ensure the welding quality, a 'welding chamber' is needed before welding, namely, air and water vapor impurity gas in the welding chamber are removed through multiple times of welding. The time of the 'welding chamber' needs to last for hours or even tens of hours. Practice proves that the non-sealing TIG welding process has the defects of large shielding gas consumption, low production efficiency, high power consumption, short electrode service life and the like for guide pipe parts which are produced periodically and have few products.
SUMMERY OF THE UTILITY MODEL
In view of the defects of the prior art, the utility model aims to provide a nuclear fuel assembly guide pipe flow hole sealing device, which aims to solve the problems of large shielding gas consumption, low production efficiency, high power consumption, short electrode service life and the like in the non-sealing TIG welding process in the prior art.
In order to realize the purpose, the utility model provides a technical scheme does: a nuclear fuel assembly guide tube flow hole sealing device comprising:
a support mechanism comprising a cavity;
the transmission mechanism comprises a pushing device, a clamping shaft and a rotating shaft, the clamping shaft and the rotating shaft are arranged in the cavity, the pushing device is connected with the clamping shaft, one end of the rotating shaft is sleeved at the tail end of the clamping shaft, the pushing device pushes the clamping shaft to move, and the rotating shaft drives the clamping shaft to rotate;
the sealing mechanism comprises a sealing ring, a positioning block and a supporting block, the sealing ring comprises a first sealing ring and a second sealing ring, sealing grooves are respectively arranged at two ends of the supporting block, the first sealing ring and the second sealing ring are respectively arranged in positioning grooves at two ends of the supporting block, the positioning block is sleeved at the other end of the rotating shaft, and the supporting block is arranged in the rotating shaft and positioned between the positioning block and the clamping shaft;
coaxial channels are arranged in the middle of the clamping shaft, the supporting block and the positioning block;
the pushing device pushes the clamping shaft to press the sealing mechanism tightly.
Further, when the clamping shaft moves towards the positioning block, the space surrounded by the tail end of the clamping shaft, the supporting block, the inner wall of the rotating shaft and the channel is filled with the first sealing ring, and the space surrounded by the supporting block, the positioning block, the inner wall of the rotating shaft and the channel is filled with the second sealing ring.
Further, the sealing ring is made of a material with elastic deformation property.
Further, the distance length between the sealing grooves at the two ends of the supporting block covers a guide pipe water hole.
Further, the supporting mechanism further comprises a base and a bearing cover, and the cavity is enclosed by the base and the bearing cover; the piston is arranged between the base and the clamping shaft, the piston and the clamping shaft are connected through a clamping shaft gland, and a first bearing is arranged between the clamping shaft and the piston.
Further, the pushing device comprises a cylinder and a connecting plate, the cylinder is connected with the connecting plate, the connecting plate is connected with the piston, and a limiting block is arranged between the cylinder and the connecting plate.
Furthermore, the connecting plate is connected with the cylinder through a bolt, and the limiting block is a nut.
Further, be equipped with the second bearing between base and the rotation axis, be equipped with the third bearing between bearing cap and the rotation axis, be equipped with the bearing spacer ring between second bearing and the third bearing.
Furthermore, a limiting boss is arranged inside the base and is located at the end point of the piston moving towards the inside of the base.
A second object of the present invention is to provide a guiding pipe sealing and welding device, which comprises a sealing welding chamber and a pipe opening sealing device, and a guiding pipe water hole sealing device.
Has the advantages that:
the utility model provides a drain hole sealing device extrudees the sealing washer at supporting shoe both ends through power unit cylinder drive clamping shaft, receives extruded sealing washer to produce and warp, and the pipe outer wall in lip and the passageway closely laminates to the realization is to the sealed of pipe flow water hole part, and in addition, the welding process can be guaranteed to the bearing that rotation axis and clamping shaft outside set up, and the sealing washer rotates along with the pipe is synchronous, can not cause the fish tail and the distortion of pipe wall of pipe. The defects of large shielding gas consumption, low production efficiency, high power consumption and short electrode service life of the non-sealing TIG welding process are overcome. The utility model provides a sealing device leakproofness is good, can satisfy and manage to find time below 10Pa or aerify to the operational environment about 1.4MPa in the welding chamber, does not influence the rotation of boxing in-process stand pipe, can not arouse surface pollution, the damage or the deformation of stand pipe, easily the inserting and taking out of stand pipe, and manufacturing low price, the cost is controllable.
Drawings
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the following description of the present invention will refer to the accompanying drawings and illustrate embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Fig. 1 is a schematic structural diagram of a sealing device according to an embodiment of the present invention.
Reference numerals:
10-a base;
20-a bearing cap; 21-a first screw;
30-a cylinder; 31-second screw
40-a connecting plate; 41-bolt; 42-a nut; 43-a cylinder motion stop block; 44-a third screw;
50-a piston;
60-a clamping shaft; 61-a first bearing; 62-clamping the shaft gland; 63-a fourth screw;
70-a rotating shaft; 71-a second bearing; 72-a third bearing; 73-bearing spacer ring;
80-positioning blocks; 81-fifth screw;
90-a support block; 91-O type sealing ring.
Detailed Description
To realize the seal welding of the guide pipe component, three technical problems need to be solved: sealing welding chamber, pipe mouth sealing and water flowing hole (round through hole on outer pipe) dynamic sealing. The sealing welding chamber and the pipe orifice sealing are mature technologies and are widely applied to the nuclear fuel assembly fuel rod welding process. Therefore, the difficulty of the seal welding of the guide pipe parts is the dynamic sealing of the water flow holes on the outer pipe.
Therefore, the utility model provides a dynamic seal device for pipe flow water hole.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
It will also be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Fig. 1 is a schematic diagram of an embodiment provided by the present invention.
Referring to fig. 1, the sealing device provided in this embodiment includes a supporting mechanism composed of a base 10 and a bearing cap 20, the base 10 is open at two ends, the bearing cap 20 is covered on the open end of the base 10, and the base 10 and the bearing cap 20 are connected by a first screw 21. The design of the separated supporting structure can facilitate the installation of parts in the cavity inside the supporting structure.
Two cylinders 30 are arranged on two side surfaces of the base 10, each cylinder 30 is fixed on the base 10 through two second screws 31, the cylinders 30 provide power for the sealing device after being communicated with compressed air, the movable ends of the cylinders 30 are connected with a connecting plate 40 through bolts 41 and nuts 42, the connecting plate 40 is positioned on the opening side of the other end of the base 1, the nuts 42 are respectively arranged on two sides of the cylinder connecting plate and play a role in fixing and adjusting the position of the connecting plate 40, cylinder movement limiting blocks 43 are arranged between the connecting plate 40 and the cylinders 30 to limit the stroke of the cylinders 30 and prevent overlarge extrusion force of internal components, and the extrusion force can be changed by adjusting the positions of the nuts 42.
The piston 50 is inserted into the base 10 from the open end of the base 10 where the connecting plate 40 is arranged, and is fixedly connected with the connecting plate 40 through the third screw 44, and the piston 50 reciprocates in the vertical direction in the base 10 under the pushing action of the cylinder 40, wherein the vertical direction is perpendicular to the connecting plate 40. The piston 50 is provided with a channel in the middle, the channel is provided with a clamping shaft 60, the clamping shaft 60 is a tubular step shaft, the middle is provided with a guide tube inserting channel, the outer surface of the clamping shaft 60 is provided with an annular step, the annular step and the surface of the channel of the piston 50 enclose a space, and a first bearing 61 matched with the clamping shaft is arranged in the space. The piston 50 and the clamping shaft 60 are fixedly connected through a clamping shaft gland 62, the clamping shaft gland 60 is screwed with the piston 50 through four fourth screws 63 and abuts against the clamping shaft 60 at the same time, and the clamping shaft 60 moves synchronously along with the piston 50 under the pushing action of the cylinder 40. Wherein, the movement range of the piston 50 in the base 10 is limited by the limit boss 11 inside the base 10.
The length of the clamping shaft 60 is greater than that of the piston 50, so that the clamping shaft 60 has a section extending out of the piston 50, a rotary shaft 70 is sleeved on the extending section, the inner surface of the rotary shaft 70 is matched with the outer surface of the clamping shaft 60, a positioning block 80 is sleeved on the other end of the rotary shaft 70, the positioning block 80 is step-shaped, the outer surface of the part inserted into the rotary shaft 70 is matched with the inner surface of the rotary shaft 70, the step-shaped part is matched with the tail end of the rotary shaft 70, and is fixedly connected with the rotary shaft 70 through a fifth screw 81, so that the internal device. A supporting block 90 is arranged between the clamping shaft 60 and the positioning block 80, two ends of the supporting block 90 are respectively opposite to the clamping shaft 60 and the positioning block 80, positioning grooves (not shown in the figure) are arranged on the surfaces of two ends of the supporting block 90, an O-shaped sealing ring 91 is arranged in each positioning groove, the O-shaped sealing ring 91 is made of an elastic deformation material, and under the extrusion of the clamping shaft 60, the O-shaped sealing ring 91 is extruded to deform and is attached to the outer part of the inserted guide pipe to play a sealing role. The supporting block 90 has the effective sealing length of the sealing element, and when the sealing device is used, the guide pipe water hole is positioned between the two O-shaped sealing rings 91. A guide tube insertion passage is provided between the positioning block 80 and the supporting block 90, and is coaxial with and of the same size as the passage of the clamping shaft 60.
A second bearing 71 and a third bearing 72 which are matched with the outer surface of the rotating shaft 70 are further arranged at two ends of the rotating shaft 70, a bearing space ring 73 which is matched with the outer surface of the rotating shaft 70 is arranged between the second bearing 71 and the third bearing 72, the bearing space ring 73 has a limiting effect on the second bearing 71 and the third bearing 72, and meanwhile, the rotating shaft 70 is ensured to have a certain length so that the clamping shaft 60, the O-shaped sealing ring 91 and the supporting block 90 are effectively connected. In addition to this, the outer surface of the rotating shaft 70 may form a limit boss for limiting the two bearings, the limit boss being located between the second bearing 71 and the third bearing 72.
The rotating shaft 70, the positioning block 80 and the clamping shaft 60 are matched to limit the supporting block 90 and the O-shaped sealing ring 91, the rotating shaft 70 also connects the positioning block 80, the O-shaped sealing ring 91, the supporting block 90 and the clamping shaft 60, and under the pressing state, the rotating shaft 70, the positioning block 80, the O-shaped sealing ring 91, the supporting block 90 and the clamping shaft 60 can synchronously rotate by means of the first bearing 61, the second bearing 71 and the third bearing 72.
The working principle of the above embodiment is as follows:
the guide pipe is inserted into a channel formed by the clamping shaft 60, the supporting block 90 and the positioning block 80, and the water flow holes of the guide pipe are arranged between the O-shaped sealing rings 91 at the two ends of the supporting block 90.
The cylinder 30 is used as a power mechanism, when the cylinder 30 is inflated, the piston 50 is pushed to move towards the inside of the base 10, the first bearing 61 and the clamping shaft 60 are driven to extrude the O-shaped sealing ring 91, the O-shaped sealing ring 91 is extruded and deformed, and the lip part is tightly attached to the outer wall of the guide pipe, so that the water flowing hole part of the guide pipe is sealed.
The three bearings ensure that the O-shaped sealing ring 91 synchronously rotates along with the guide pipe in the welding process, and the pipe wall of the guide pipe cannot be scratched or distorted.
When the cylinder exhausts, the piston 50 moves towards the outside of the base 10 to drive the first bearing 61 and the clamping shaft 60 to loosen the O-shaped sealing ring 91, at the moment, the O-shaped sealing ring 91 has no extrusion effect, the O-shaped sealing ring 91 is restored to the original state and forms a size gap with the guide pipe, and at the moment, the guide pipe can be smoothly inserted or taken out.
The sealing device provided by the embodiment realizes the dynamic sealing of the water hole of the guide pipe, and effectively solves the defects of large shielding gas consumption, low production efficiency, high power consumption, short electrode service life and the like in the non-sealing TIG welding process.
In addition, the sealing device provided by the embodiment can be matched with a feeding system, so that the lifting and compressing states of the sealing device can be automatically controlled; or the guide pipe sealing welding device is obtained by matching the sealing welding chamber with the pipe orifice sealing device.
To sum up, the utility model provides an embodiment leakproofness is good, can satisfy and manage to find time below 10Pa or aerify to the operational environment about 1.4MPa in the welding chamber, does not influence the rotation of boxing in-process stand pipe, can not arouse surface pollution, damage or the deformation of stand pipe, still easily the inserting and taking out of stand pipe to the manufacturing low price, cost are controllable.
The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.
Claims (10)
1. A nuclear fuel assembly guide tube flow hole sealing device, comprising:
a support mechanism comprising a cavity;
the transmission mechanism comprises a pushing device, a clamping shaft and a rotating shaft, the clamping shaft and the rotating shaft are arranged in the cavity, the pushing device is connected with the clamping shaft, one end of the rotating shaft is sleeved at the tail end of the clamping shaft, the pushing device pushes the clamping shaft to move, and the rotating shaft drives the clamping shaft to rotate;
the sealing mechanism comprises a sealing ring, a positioning block and a supporting block, the sealing ring comprises a first sealing ring and a second sealing ring, positioning grooves are respectively formed in two ends of the supporting block, the first sealing ring and the second sealing ring are respectively arranged in the positioning grooves in the two ends of the supporting block, the positioning block is sleeved at the other end of the rotating shaft, and the supporting block is arranged in the rotating shaft and positioned between the positioning block and the clamping shaft;
coaxial channels are arranged in the middle of the clamping shaft, the supporting block and the positioning block;
the pushing device pushes the clamping shaft to press the sealing mechanism tightly.
2. The nuclear fuel assembly guide pipe flow hole sealing device of claim 1, wherein the first sealing ring fills a space defined by the end of the clamping shaft, the support block, the inner wall of the rotating shaft and the passage, and the second sealing ring fills a space defined by the support block, the inner wall of the rotating shaft and the passage when the clamping shaft moves toward the positioning block.
3. The nuclear fuel assembly guide tube water hole sealing device of claim 1, wherein the sealing ring is made of a material having elastic deformation properties.
4. The nuclear fuel assembly guide pipe water hole sealing device of claim 1, wherein the distance between the sealing grooves at the two ends of the support block covers the guide pipe water hole.
5. The nuclear fuel assembly guide pipe water hole sealing device of claim 1, wherein the support mechanism further comprises a base and a bearing cover, and the cavity is enclosed by the base and the bearing cover; the piston is arranged between the base and the clamping shaft, the piston and the clamping shaft are connected through a clamping shaft gland, and a first bearing is arranged between the clamping shaft and the piston.
6. The nuclear fuel assembly guide pipe flow water hole sealing device of claim 5, wherein the pushing device comprises a cylinder and a connecting plate, the cylinder is connected with the connecting plate, the connecting plate is connected with the piston, and a limiting block is arranged between the cylinder and the connecting plate.
7. The nuclear fuel assembly guide pipe flow water hole sealing device of claim 6, wherein the connecting plate and the cylinder are connected through a bolt, and the limiting block is a nut.
8. The nuclear fuel assembly guide pipe flow orifice sealing device of claim 5, wherein a second bearing is disposed between the base and the rotating shaft, a third bearing is disposed between the bearing cover and the rotating shaft, and a bearing spacer is disposed between the second bearing and the third bearing.
9. The nuclear fuel assembly guide pipe flow hole sealing device of claim 5, wherein the base is internally provided with a limit boss, and the limit boss is positioned at the end point of the piston moving towards the inside of the base.
10. A guide tube seal welding apparatus comprising a seal welding chamber and a nozzle seal, and a guide tube flow hole seal apparatus according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021127002.4U CN213017675U (en) | 2020-06-17 | 2020-06-17 | Nuclear fuel assembly guide pipe water hole sealing device and guide pipe sealing welding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021127002.4U CN213017675U (en) | 2020-06-17 | 2020-06-17 | Nuclear fuel assembly guide pipe water hole sealing device and guide pipe sealing welding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213017675U true CN213017675U (en) | 2021-04-20 |
Family
ID=75495949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021127002.4U Active CN213017675U (en) | 2020-06-17 | 2020-06-17 | Nuclear fuel assembly guide pipe water hole sealing device and guide pipe sealing welding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213017675U (en) |
-
2020
- 2020-06-17 CN CN202021127002.4U patent/CN213017675U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN213017675U (en) | Nuclear fuel assembly guide pipe water hole sealing device and guide pipe sealing welding device | |
| CN212398260U (en) | Flat mouthful of built-in vaulting pole tight mechanism that expands | |
| CN214838384U (en) | F-shaped grinding head seal of ball mill | |
| CN209777795U (en) | Pneumatic cone top on printing machine | |
| CN217401143U (en) | Domestic mechanical seal of imported sludge delivery pump | |
| CN222010932U (en) | Novel mechanical main shaft pulling and grabbing sealing mechanism | |
| CN219119564U (en) | Hydraulic cylinder gland with sealing structure | |
| CN220218437U (en) | A equipment frock for overvoltage release diaphragm maintenance is fixed | |
| CN210290754U (en) | Medium speed pulverizer base sealing device | |
| CN219734214U (en) | Sealing structure capable of automatically adjusting adding filler | |
| CN216201089U (en) | Oil-leakage-proof sealing cover for auxiliary connecting cylinder and auxiliary connecting valve rod | |
| CN219692964U (en) | Built-in monitoring box of gas pipeline and AI supervisory equipment | |
| CN204685702U (en) | A kind of dummy block device | |
| CN219198141U (en) | Linear motion leading-in mechanism | |
| CN207005288U (en) | A kind of packing filling | |
| CN221423944U (en) | Safety valve with gas pressure relief function | |
| CN220646753U (en) | Device for composite sealing of door shaft of hot air regulating door | |
| CN210011293U (en) | Double-screw extruder | |
| CN221018671U (en) | Synchronous pressing and synchronous adjusting device of powder forming press | |
| CN219308970U (en) | Manhole sealing cover plate of scraper chamber of coal mill | |
| CN107053539B (en) | Compression roller device | |
| CN110374781B (en) | Sealing structure for expansion joint of water turbine | |
| CN212455839U (en) | Special-shaped pipe assembly with good sealing performance | |
| CN221289231U (en) | Automatic cleaning structure for drawing and expanding pipe | |
| CN221278454U (en) | Crusher bearing dustproof sealing structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |