CN211540104U - Instrument tube mandrel guiding and positioning device - Google Patents
Instrument tube mandrel guiding and positioning device Download PDFInfo
- Publication number
- CN211540104U CN211540104U CN201922399646.2U CN201922399646U CN211540104U CN 211540104 U CN211540104 U CN 211540104U CN 201922399646 U CN201922399646 U CN 201922399646U CN 211540104 U CN211540104 U CN 211540104U
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- instrument tube
- hole
- deflector
- positioning device
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Abstract
The utility model belongs to nuclear fuel assembly manufacturing technology, concretely relates to instrument tube dabber guiding orientation device, including the deflector and install the instrument tube top on the deflector, its the deflector center pass through screw thread installation instrument tube top, inside through mounting hole installation instrument tube in instrument tube top, process the leading-in hole on the deflector for the guiding orientation of dabber. The positioning problem of the framework instrument tube of Hualong I is effectively solved, and the framework instrument tube positioning of AFA3G can be considered. And has the function of guiding and positioning the mandrel. Not easy to damage, simple and convenient to operate, high in reliability and capable of effectively guaranteeing the quality of the framework.
Description
Technical Field
The utility model belongs to nuclear fuel assembly makes the technique, concretely relates to instrument tube dabber guiding orientation device.
Background
The framework is an important component in the production of AFA3G fuel assemblies, and is formed by welding a grid with a guide tube and an instrument tube (or flux measuring tube) by adopting pressure resistance spot welding. The instrumentation tube of AFA3G was secured at the bottom tube socket central hole using a swage tool prior to skeleton welding.
In the actual use process, an operator finds that the bulging tool is easy to wear, cracks are not easy to find, and the quality problem of the framework is easily caused. And the structure of the lower tube seat of the framework of Hualong I has changed a few, the centre hole shrinks and leads to the original bulging tool can't carry on the instrument tube location, therefore need design a new instrument tube mandrel guiding orientation device that can meet the needs.
Disclosure of Invention
The utility model aims at providing an instrument tube dabber guiding orientation device, it is not fragile, easy and simple to handle, the reliability is high.
The technical scheme of the utility model as follows:
the utility model provides an instrument tube dabber guiding orientation device, includes the deflector and installs the instrument tube top on the deflector, its the deflector center pass through screw thread installation instrument tube top, instrument tube top inside through mounting hole installation instrument tube, process the inlet hole on the deflector for the guiding orientation of dabber.
Instrument pipe top tip be equipped with tip stair structure, be equipped with the screw thread on the outer wall, the centre bore of deflector central processing notch cuttype shape, the internal thread of processing in the centre bore, instrument pipe top tip pass through threaded connection and install in the centre bore at deflector center.
The center hole of the guide plate is a stepped hole, an internal thread is processed on the inner wall of the large end of the hole, and an external thread is processed on the outer wall of the small end of the stepped structure at the top end of the instrument tube.
The instrument tube top still include the top pipe of being connected with tip stair structure, the inside smooth through-hole that is of top pipe, the reaming outside the inside processing toper of tip stair structure, the reaming communicates with each other outside through-hole and the toper, constitutes jointly the mounting hole.
The inner diameter of the small end of the conical outer reaming is the same as that of the through hole.
One end of the instrument tube is arranged in the through hole.
The guide plate main body is a circular plate, the edge of the guide plate main body is provided with an installation bottom edge, and the thickness of the installation bottom edge is smaller than that of the main body circular plate.
And a fixed structure block is processed on one side of the mounting bottom edge, and a bolt hole along the radial direction of the circular plate is processed on the fixed structure block.
The utility model discloses an effect as follows: the positioning problem of the framework instrument tube of Hualong I is effectively solved, and the framework instrument tube positioning of AFA3G can be considered. And has the function of guiding and positioning the mandrel. Not easy to damage, simple and convenient to operate, high in reliability and capable of effectively guaranteeing the quality of the framework.
Drawings
FIG. 1 is a schematic view of an instrument tube mandrel guide positioning device;
FIG. 2a is a schematic cross-sectional view of a guide plate;
FIG. 2b is a schematic view of a guide plate;
FIG. 3 is a schematic top view of the instrument tube;
in the figure: 1. a guide plate; 2. an instrument tube tip; 3. a mandrel lead-in hole; 4. a guide plate center hole; 5. an instrument tube; 6. mounting a bottom edge; 7. bolt holes; 8. fixing the structural block; 201. an end step structure; 202. conical outer reaming; 203. a plug circular tube; 204. and a through hole.
Detailed Description
The present invention will be further explained with reference to the drawings and the detailed description.
As shown in figure 1, the instrument tube mandrel guiding and positioning device comprises a guide plate 1 and an instrument tube top head 2 arranged on the guide plate 1, and an instrument tube 5 is positioned and arranged through the instrument tube top head 2.
As shown in fig. 1, 2a and 2b, the guide plate 1 is a circular plate as a main body, a mounting base 6 is formed at the edge, the thickness of the mounting base 6 is smaller than that of the circular plate of the main body, a fixing structure block 8 is formed on one side of the mounting base 6, a bolt hole along the radial direction of the circular plate is formed in the fixing structure block 8, and the guide plate 1 is fixed to the lower stem by a bolt.
The function of the guide plate 1 includes positioning and spindle guiding of the instrument tube 5.
For this purpose, a guide plate central hole 4 is machined in the center of the guide plate 1 and used for installing the instrument tube top 2; a mandrel leading-in hole 3 is processed on a main circular plate of the guide plate 1 and used for guiding, installing and positioning a mandrel.
The central hole 4 of the guide plate is a step-shaped hole, an internal thread is processed on the inner wall of the large end of the hole, and the shape of the step-shaped hole is matched with the outer part of the top 2 of the instrument tube.
The mandrel lead-in hole 3 is a smooth round hole with an end opening being an outward-expanding conical surface.
As shown in fig. 3, the instrument tube plug 2 is composed of two parts, an end stepped structure 201 and a plug round tube 203, a smooth through hole 204 is formed inside the plug round tube 203, and a tapered outer counterbore 202 is formed inside the end stepped structure 201. Tapered outer counterbore 202 communicates with through bore 204 and the inner diameter of the small end of tapered outer counterbore 202 is the same as the inner diameter of through bore 204. One end of the instrumentation tube 5 is mounted in the through hole 204 and the other end is pressed against the lower tube base to fix the instrumentation tube 5.
The outer wall of the small end portion of the end stepped structure 201 is externally threaded.
The external thread is matched with the internal thread of the inner wall of the large end of the stepped hole of the central hole 4 of the guide plate, so that the instrument tube top 2 is connected with the guide plate 1 through the thread. Before the framework is welded, an operator fixes the guide plate 1 on the lower tube seat and then introduces the mandrel.
The original guide plate is made of stainless steel, so that the weight is heavier, and the use of an operator is more difficult.
Polyethylene can now be used as the material for the carcass mandrel guide plate.
Claims (8)
1. The utility model provides an instrument tube dabber guiding orientation device, includes deflector (1) and installs instrument tube top (2) on deflector (1), its characterized in that: deflector (1) center pass through screw thread installation instrument tube top (2), instrument tube top (2) inside through mounting hole installation instrument tube (5), processing inlet hole (3) on deflector (1) for the direction location of dabber.
2. An instrument tube mandrel guiding and positioning device as recited in claim 1, wherein: instrument tube top (2) tip be equipped with tip stair structure (201), be equipped with the screw thread on the outer wall, deflector (1) central processing notch cuttype shape's centre bore (4), centre bore (4) internal thread of processing, instrument tube top (2) tip pass through threaded connection and install in centre bore (4) at deflector (1) center.
3. An instrument tube spindle guide positioning device as recited in claim 2, wherein: the instrument tube top guide plate is characterized in that the guide plate center hole (4) is a stepped hole, an inner thread is processed on the inner wall of the large end of the hole, and an outer thread is processed on the outer wall of the small end part of the stepped structure (201) at the end part of the instrument tube top (2).
4. An instrument tube spindle guide positioning device as recited in claim 2, wherein: instrument pipe top (2) still include top pipe (203) of being connected with tip stair structure (201), inside smooth through-hole (204) of being of top pipe (203), reaming (202) outside the inside processing toper of tip stair structure (201), through-hole (204) and toper are reaming (202) outward and are communicated with each other, constitute jointly the mounting hole.
5. An instrument tube spindle guide positioning device as recited in claim 4, wherein: the inner diameter of the small end of the conical outer reaming hole (202) is the same as that of the through hole (204).
6. An instrument tube spindle guide positioning device as recited in claim 5, wherein: one end of the instrument tube (5) is arranged in the through hole (204).
7. An instrument tube mandrel guiding and positioning device as recited in claim 1, wherein: the guide plate (1) is characterized in that the main body is a circular plate, the edge of the main body is provided with an installation bottom edge (6), and the thickness of the installation bottom edge (6) is smaller than that of the main body circular plate.
8. An instrument tube spindle guide positioning device as recited in claim 7, wherein: and a fixed structure block (8) is processed on one side of the mounting bottom edge (6), and a bolt hole along the radial direction of the circular plate is processed on the fixed structure block (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922399646.2U CN211540104U (en) | 2019-12-27 | 2019-12-27 | Instrument tube mandrel guiding and positioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922399646.2U CN211540104U (en) | 2019-12-27 | 2019-12-27 | Instrument tube mandrel guiding and positioning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211540104U true CN211540104U (en) | 2020-09-22 |
Family
ID=72510444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922399646.2U Active CN211540104U (en) | 2019-12-27 | 2019-12-27 | Instrument tube mandrel guiding and positioning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211540104U (en) |
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2019
- 2019-12-27 CN CN201922399646.2U patent/CN211540104U/en active Active
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