CN213363626U - Large-scale shielding main pump kingbolt elongation measuring tool - Google Patents
Large-scale shielding main pump kingbolt elongation measuring tool Download PDFInfo
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- CN213363626U CN213363626U CN202022657750.XU CN202022657750U CN213363626U CN 213363626 U CN213363626 U CN 213363626U CN 202022657750 U CN202022657750 U CN 202022657750U CN 213363626 U CN213363626 U CN 213363626U
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Abstract
The utility model relates to the technical field of nuclear power station shielding main pump maintenance, in particular to a large-scale shielding main pump main bolt elongation measuring tool, which comprises a depth micrometer and a measuring rod; the magnetic base is provided with one axial end face connected with one side of the depth micrometer, wherein the side is used for arranging the measuring rod, the other axial end face is provided with a magnetic absorption layer, and a cavity for accommodating the measuring rod is arranged in the magnetic base; one axial end of the outer cylinder is connected with the magnetic base, and a cylinder cavity of the outer cylinder is axially communicated with the cavity; the balance spring is connected with one axial end of the outer barrel; the measuring head is connected with one axial end of the balance spring; the inner core rod is arranged in the cylinder cavity of the outer cylinder. This application measuring tool can be used for shielding the elongation measurement after the main pump kingbolt heating to measurement operation is simple and convenient, the time spent in measurement is short, measurement accuracy is high, has greatly shortened the mainline time limit for a project that the power plant shields the main pump and overhauls, has higher economic benefits.
Description
Technical Field
The utility model relates to a nuclear power station shielding main pump maintenance technical field specifically is a large-scale shielding main pump kingbolt elongation measuring tool.
Background
A pump shell of a shielding type reactor coolant pump (hereinafter referred to as shielding main pump) is welded on a bottom head of a steam generator, and the shielding main pump is inversely arranged on the pump shell through 24 main bolts. When the shield main pump is maintained, the shield main pump and the pump shell need to be disassembled and assembled. When the shield main pump is returned, the main bolt needs to be heated to be elongated and returned, and the elongation of the heated main bolt must be within a predetermined range. However, due to the difference in the mass of the heating rod of the bolt heater and the difference in the operation method of the operator, the elongation of the main bolt is not easy to control, and therefore, the elongation of the main bolt needs to be measured by a measuring tool to ensure that the elongation of the main bolt is within a specified range when the main bolt is reinstalled.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the problem that prior art exists, a large-scale shielding main pump king bolt elongation measuring tool that measuring time is short, measuring accuracy is high is proposed.
The utility model provides a technical scheme that its technical problem adopted is: large-scale shielding main pump kingbolt elongation measuring tool includes
The depth micrometer comprises a measuring rod;
the magnetic base is provided with one axial end face connected with one side of the depth micrometer, wherein the side is used for arranging the measuring rod, the other axial end face is provided with a magnetic absorption layer, and a cavity for accommodating the measuring rod is arranged in the magnetic base;
one axial end of the outer cylinder is connected with the magnetic base, and a cylinder cavity of the outer cylinder is axially communicated with the cavity;
the balance spring is connected with one axial end of the outer barrel;
the measuring head is connected with one axial end of the balance spring;
the inner core rod is arranged in the cylinder cavity of the outer cylinder, one axial end of the inner core rod penetrates through the balance spring to be connected with the end part of the measuring head, and the other axial end of the inner core rod corresponds to the free end of the measuring rod.
This application measuring tool can be used for shielding the elongation measurement after the main pump kingbolt heating to measurement operation is simple and convenient, the time spent in measurement is short, measurement accuracy is high, has greatly shortened the mainline time limit for a project that the power plant shields the main pump and overhauls, has higher economic benefits.
Preferably, the outer cylinder and the magnetic base are integrally formed.
Preferably, the outer cylinder comprises at least two sections of cylinders, and two adjacent cylinders are connected through a guide sleeve.
Preferably, the guide sleeve comprises a first sleeving part and a second sleeving part which are sleeved with the inner cylinder wall of the outer cylinder, and an interval supporting part which is arranged between the first sleeving part and the second sleeving part.
Preferably, the first and second caulking portions and the spacer support portion have the same inner diameter and are provided with inner wall surfaces.
Preferably, the inner wall of the outer cylinder is provided with at least two sliding guide sleeves.
Preferably, the diameter of the cavity is larger than that of the cylinder cavity, and a limiting piece with the diameter larger than that of the cylinder cavity is sleeved on the end, located inside the cavity, of the inner core rod.
Preferably, the distance between the limiting sheet and the top wall of the cavity is greater than the measuring range of the depth micrometer.
Preferably, the connecting end of the measuring head and the balance spring is provided with a connecting groove allowing the balance spring to partially enter.
Preferably, the magnetic base is internally provided with an iron core connected with the magnetic attraction layer, a coil wound on the iron core, and a button battery connected with the coil through a switch, wherein the switch is arranged outside the magnetic base.
Advantageous effects
This application measuring tool can be used for shielding the elongation measurement after the main pump kingbolt heating to measurement operation is simple and convenient, the time spent in measurement is short, measurement accuracy is high, has greatly shortened the mainline time limit for a project that the power plant shields the main pump and overhauls, has higher economic benefits.
Drawings
FIG. 1 is a schematic structural diagram of a tool for measuring elongation of a main bolt of a large-scale shielding main pump according to the application;
FIG. 2 is a view of the elongation measuring tool of FIG. 1 in use assembled with a kingbolt;
fig. 3 is a schematic structural diagram of the guide sleeve of the present application.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
As shown in fig. 1 and 2, the tool for measuring the elongation of the main bolt of the large-sized shielding main pump comprises a depth micrometer 1, a magnetic base 2, an outer cylinder 3, a balance spring 4, a measuring head 5 and an inner core rod 6.
The depth micrometer 1 comprises a measuring rod 11, the measuring rod 11 can be stretched by rotating a knob, and the length of the stretching of the measuring rod 11 can be read by a graduated scale. 2 axial terminal surfaces of magnetism base with degree of depth micrometer 1 is used for setting up 11 one side of measuring stick is connected, another axial terminal surface is equipped with magnetism and inhales layer 21, just 2 inside holding that are equipped with of magnetism base 11's cavity for with this application measuring tool actuation on 8 bottom surfaces of kingbolt. One axial end of the outer cylinder 3 is connected with the magnetic base 2, and the cylinder cavity of the outer cylinder is axially communicated with the cavity. One axial end of the balance spring 4 is connected with the other axial end of the outer cylinder 3 and is used for supporting the measuring head 5 and the inner core rod 6. And one axial end of the measuring head 5 is connected with the other axial end of the balance spring 4 and is used for abutting against the bottom in the measuring hole of the main bolt 8. The inner core rod 6 is arranged in the cylinder cavity of the outer cylinder 3, one axial end of the inner core rod penetrates through the balance spring 4 to be connected with the end part of the measuring head 5, and the other axial end of the inner core rod corresponds to the free end of the measuring rod 11. After the measuring rod 11 extends, the measuring rod abuts against the inner core rod 6 and pushes the inner core rod 6 and the measuring head 5 to extend together until the measuring head 5 abuts against the bottom in the measuring hole of the main bolt 8.
When the measuring tool is used specifically, the measuring head 5 and the outer cylinder 3 are inserted into the measuring hole of the main bolt 8, and the magnetic absorption layer 21 of the magnetic base 2 is magnetically connected with the bottom surface of the main bolt 8, so that the whole measuring tool is supported; then, the depth micrometer 1 is adjusted to extend the measuring rod 11 until the measuring head 5 abuts against the bottom of the measuring hole of the main bolt 8, and at this time, the extending length of the measuring rod 11 is read and recorded as X1. Then taking the measuring tool down from the main bolt 8, heating and stretching the main bolt 8, inserting the measuring head 5 and the outer cylinder 3 into the measuring hole of the main bolt 8 after stretching is finished, and enabling the magnetic absorption layer 21 of the magnetic base 2 to be in magnetic absorption connection with the bottom surface of the main bolt 8; and finally, continuously adjusting the depth micrometer 1 to enable the measuring rod 11 to extend until the measuring head 5 abuts against the bottom in the measuring hole of the main bolt 8, reading the extending length of the measuring rod 11 at the moment, and recording the extending length as X2, wherein the difference between X2 and X1 is the extending amount of the main bolt 8 after being heated and stretched. The measuring tool can be used for measuring the elongation of the main bolt 8 very simply, conveniently and quickly, and the measured data accuracy is high.
The outer cylinder 3 and the magnetic base 2 are integrally formed, so that the overall stability of the measuring tool structure is improved.
The outer cylinder 3 comprises at least two sections of cylinders, and the adjacent two cylinders are connected through a guide sleeve 7. The outer cylinder 3 is thin and long, flexible deformation is easy to occur, the outer cylinder 3 is divided into multiple sections and connected through the guide sleeve 7, the outer cylinder 3 can be effectively prevented from deforming, and therefore the measuring precision of the measuring tool is guaranteed.
As shown in fig. 3, the guide sleeve 7 includes a first engaging portion 71 and a second engaging portion 72 that engage with the inner cylindrical wall of the outer cylinder 3, and a spacing support portion 73 provided between the first engaging portion 71 and the second engaging portion 72. When the outer cylinder 3 is assembled, the outer cylinder 3 is only required to be sleeved on the sleeved portion of the guide sleeve 7 and abut against the spacing support portion 73, and the assembly operation is very simple.
The first and second nesting portions 71, 72 and the spacing support portion 73 have the same inner diameter and are provided with smooth inner walls. The first hitching section 71, the second hitching section 72, and the spacer support section 73 of the guide bush 7 are integrally formed, and can guide the inner core bar 6 in addition to the outer cylinder 3. The clearance between the inner wall of the guide sleeve 7 and the inner core rod 6 is very small, and even the guide sleeve can slightly contact with the inner core rod 6, so that the inner core rod 6 has a sliding guide effect when moving up and down, and the influence on the measurement result caused by position inclination in the extension process of the inner core rod 6 is avoided.
The inner wall of the outer cylinder 3 is provided with at least two sliding guide sleeves 9. One of them slip uide bushing 9 sets up in the bottom of urceolus 3, and a slip uide bushing 9 sets up in the top of urceolus 3, and other slip uide bushings 9 can be according to the specific length selectivity setting of urceolus 3, can further reciprocate inside core bar 6 through slip uide bushing 9 and play the slip guide effect, have further improved this application measuring tool's the degree of accuracy.
The diameter of the cavity is larger than that of the cylinder cavity, and the inner core rod 6 is sleeved with a limiting piece 61 with the diameter larger than that of the cylinder cavity at the inner end of the cavity. When not using, measuring tool need carry the removal (generally with holding manually), for convenient taking, the hand is held in depth micrometer 1 department usually for measuring tool is in the state of invering, and at this moment, balance spring 4 can be stretched because of the action of gravity of measuring head 5, inside core bar 6, long-term in the past, can cause certain influence to balance spring 4's elastic coefficient. And the arrangement of the limiting sheet 61 ensures that the gravity of the measuring head 5 and the inner core rod 6 when inverted is born by the limiting sheet 61, thereby avoiding the influence on the balance spring 4.
The distance between the limiting sheet 61 and the top wall of the cavity is larger than the measuring range of the depth micrometer 1, so that the problem that the measuring tool cannot normally measure due to insufficient extension length of the inner core rod 6 is avoided.
The end of the measuring head 5 connected to the balancing spring 4 is provided with a connecting slot allowing the balancing spring 4 to partially enter. The balance spring 4 is mostly located in the connecting groove, so that the connecting effect of the balance spring 4 and the measuring head 5 is improved, and the supporting effect of the balance spring 4 on the measuring head 5 and the inner core rod 6 is further improved.
The inside iron core that still is equipped with the layer 21 is inhaled to magnetism is connected to magnetism, the winding on the iron core to and through the switch with button cell that the coil is connected, the switch is located 2 outsides of magnetism base. The magnetic attraction of the magnetic base 2 can be adjusted according to the actual use condition, when the switch is turned on, the magnetic attraction layer 21 of the magnetic base 2 generates magnetic attraction force for connecting the magnetic attraction layer 21 with the bottom surface of the main bolt 8; when the switch is turned off, the magnetic attraction layer 21 of the magnetic base 2 loses magnetic attraction force, and the magnetic attraction layer 21 and the bottom surface of the main bolt 8 lose connection effect. The magnetic base 2 of the structure can avoid the error of the measuring tool exceeding due to violent contact when the measuring tool is connected with the main bolt 8, and can facilitate the detachment of the measuring tool and the main bolt 8.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and are not intended to limit the spirit and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by the technical solution of the present invention by those skilled in the art should fall into the protection scope of the present invention, and the technical contents claimed by the present invention have been fully recorded in the claims.
Claims (10)
1. The utility model provides a large-scale shielding main pump kingbolt elongation measuring tool which characterized in that: comprises that
The depth micrometer (1) comprises a measuring rod (11);
the device comprises a magnetic base (2), one axial end face of the magnetic base is connected with one side, used for arranging the measuring rod (11), of the depth micrometer (1), the other axial end face of the magnetic base is provided with a magnetic absorption layer (21), and a cavity for accommodating the measuring rod (11) is formed in the magnetic base (2);
the outer cylinder (3) has one axial end connected with the magnetic base (2), and a cylinder cavity thereof is axially communicated with the cavity;
the balance spring (4) is connected with one axial end of the outer cylinder (3);
the measuring head (5) is connected with one axial end of the balance spring (4);
the inner core rod (6) is arranged in the cylinder cavity of the outer cylinder (3), one axial end of the inner core rod penetrates through the balance spring (4) to be connected with the end of the measuring head (5), and the other axial end of the inner core rod corresponds to the free end of the measuring rod (11).
2. The tool for measuring the elongation of the main bolt of the large-scale shielded main pump according to claim 1, wherein: the outer cylinder (3) and the magnetic base (2) are integrally formed.
3. The tool for measuring the elongation of the main bolt of the large-scale shielded main pump according to claim 1, wherein: the outer cylinder (3) comprises at least two sections of cylinders, and the adjacent two cylinders are connected through a guide sleeve (7).
4. The tool for measuring the elongation of the main bolt of the large-scale shielded main pump according to claim 3, wherein: the guide sleeve (7) comprises a first sleeving part (71) and a second sleeving part (72) which are sleeved with the inner cylinder wall of the outer cylinder (3), and an interval supporting part (73) arranged between the first sleeving part (71) and the second sleeving part (72).
5. The tool for measuring the elongation of the main bolt of the large-scale shielded main pump according to claim 4, wherein: the inner diameters of the first sleeving part (71), the second sleeving part (72) and the interval supporting part (73) are the same, and the inner wall surfaces are smooth.
6. The tool for measuring the elongation of the main bolt of the large-scale shielded main pump according to claim 1, wherein: the inner wall of the outer cylinder (3) is provided with at least two sliding guide sleeves (9).
7. The tool for measuring the elongation of the main bolt of the large-scale shielded main pump according to claim 1, wherein: the diameter of the cavity is larger than that of the barrel cavity, and a limiting piece (61) with the diameter larger than that of the barrel cavity is sleeved on the end, located inside the cavity, of the inner core rod (6).
8. The tool for measuring the elongation of the main bolt of the large-scale shielded main pump according to claim 7, wherein: the distance between the limiting sheet (61) and the top wall of the cavity is larger than the measuring range of the depth micrometer (1).
9. The tool for measuring the elongation of the main bolt of the large-scale shielded main pump according to claim 1, wherein: the measuring head (5) is connected with the balance spring (4) through a connecting groove allowing the balance spring (4) to partially enter.
10. The tool for measuring the elongation of the main bolt of the large-scale shielded main pump according to claim 1, wherein: the magnetic base (2) is internally provided with an iron core connected with the magnetic absorption layer (21), a coil wound on the iron core and a button battery connected with the coil through a switch, and the switch is arranged outside the magnetic base (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022657750.XU CN213363626U (en) | 2020-11-17 | 2020-11-17 | Large-scale shielding main pump kingbolt elongation measuring tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022657750.XU CN213363626U (en) | 2020-11-17 | 2020-11-17 | Large-scale shielding main pump kingbolt elongation measuring tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213363626U true CN213363626U (en) | 2021-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022657750.XU Active CN213363626U (en) | 2020-11-17 | 2020-11-17 | Large-scale shielding main pump kingbolt elongation measuring tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213363626U (en) |
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2020
- 2020-11-17 CN CN202022657750.XU patent/CN213363626U/en active Active
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