A device and method for measuring the tensile amount of a main bolt of a high-temperature gas cooled reactor main helium blower

Abstract

The embodiment of the present disclosure provides a kind of high temperature gas cooled reactor main helium fan main bolt tensile measurement device and method, the head of the main bolt is provided with tensile measurement base block and the tensile measurement rod inserted in the tensile measurement base block, measurement device includes: measurement base, measurement base is provided with first installation hole and the measurement hole being communicated with the first installation hole, first installation hole is used to be connected with the tensile measurement base block;Intermediate measurement rod, the first end of intermediate measurement rod is movably inserted into the measurement hole and can be contacted with the tensile measurement rod;Fixed support, fixed support is fixed to the measurement base, fixed support is provided with second installation hole at the position corresponding to the measurement hole;Displacement measuring element, the first end of displacement measuring element passes through the second installation hole to the second end of the intermediate measurement rod abuts.This measurement device of the present disclosure is simple in structure, can reliably fix displacement measuring element, and installation is convenient, measurement is simple.

Description

Technical Field

[0001] This disclosure pertains to the field of nuclear power technology, specifically relating to a device and method for measuring the tensile strength of the main bolt of the main helium blower in a high-temperature gas-cooled reactor. Background Technology

[0002] The main bolts of the main helium blower in the high-temperature gas-cooled reactor are fasteners for the main flange of the primary circuit pressure boundary. They are installed by hydraulic tension, and the tightness is confirmed by measuring the tension. The reliable installation of the main bolts is related to whether the leakage rate of the primary circuit medium can meet the design requirements. Therefore, it is necessary to accurately measure the tension of the main bolts.

[0003] There are currently two methods for measuring the tensile amount of the main bolt of the main helium blower in a high-temperature gas-cooled reactor. One method is to directly measure the distance between the end face of the tensile measuring rod and the end face of the tensile measuring base block before and after tensile testing using a depth vernier caliper, and calculate the difference as the tensile amount. The other method is to measure the difference in relative displacement between the end face of the tensile measuring rod and the end face of the tensile measuring base block before and after tensile testing using a dial indicator, which is the tensile amount.

[0004] The following problems exist when using depth vernier calipers for measurement:

[0005] ① The small end face area of ​​the tensile measuring base block leads to unreliable fixation when the depth vernier caliper is in contact, affecting measurement efficiency and accuracy.

[0006] ②The readings of depth vernier calipers are not as intuitive as those of dial indicators, which affects measurement efficiency.

[0007] The following problems exist when using a dial indicator for direct measurement:

[0008] ① The measurement reference surface is small, and the dial indicator needs to be fixed with special tooling to carry out the measurement;

[0009] ② When measuring tensile strength using a dial indicator that directly contacts the end face of the tensile measuring rod, if the dial indicator is not securely fixed and the measurement reference changes, it will be impossible to re-establish the reference.

[0010] All the data measured above are unavailable for reference;

[0011] ③ When using a dial indicator to directly contact the end face of the tensile measuring rod to measure the tensile amount, the measured value is the difference in tensile amount, which cannot reflect the true displacement between the end face of the tensile measuring rod and the end face of the tensile measuring base block. Therefore, the measurement data in this case cannot provide a reference for the next tensile work. Summary of the Invention

[0012] The present disclosure aims to at least solve one of the technical problems existing in the prior art, and provides a device and method for measuring the tensile amount of the main bolt of the main helium blower in a high-temperature gas-cooled reactor.

[0013] One aspect of this disclosure provides a device for measuring the tensile strength of a main bolt of a high-temperature gas-cooled reactor main helium blower. The head of the main bolt is provided with a tensile measuring base block and a tensile measuring rod inserted into the tensile measuring base block. The measuring device includes: a measuring base having a first mounting hole and a measuring hole communicating with the first mounting hole, the first mounting hole being used to connect to the tensile measuring base block; an intermediate measuring rod, the first end of which is movably inserted into the measuring hole and can contact the tensile measuring rod; a fixed support fixed to the measuring base, the fixed support having a second mounting hole at a position corresponding to the measuring hole; and a displacement measuring element, the first end of which passes through the second mounting hole to abut against the second end of the intermediate measuring rod.

[0014] Optionally, the first mounting hole, the measuring hole, and the second mounting hole are all coaxial.

[0015] Optionally, the fixed support includes: a cross frame and side frames disposed at both ends of the cross frame; the cross frame spans above the measuring base and is provided with the second mounting hole; the side frames are located outside the measuring base and the ends of the side frames are connected to the measuring base.

[0016] Optionally, the end of the side frame is provided with a first fastening hole, and the outer side wall of the measuring base is provided with a second fastening hole corresponding to the first fastening hole, so as to fix the fixed support to the measuring base by fasteners passing through the first fastening hole and the second fastening hole.

[0017] Optionally, the inner side of the side frame is provided with an inwardly recessed positioning stop, which is located on the measuring base and is used to limit the fixed support.

[0018] Optionally, the crossbeam has a slot along its length and on both radial sides of the second mounting hole; the side of the crossbeam has a fixing hole corresponding to the slot, so that a fixing member passing through the fixing hole from the opposite direction can fix the displacement measuring member to the fixing support.

[0019] Optionally, the measuring base includes: a mounting cylinder and a fixing part disposed on both symmetrical sides of the mounting cylinder; the mounting cylinder has a first mounting hole and the measuring hole in its central region, the mounting cylinder is flush with the first end of the fixing part, and the second end of the mounting cylinder is shorter than the second end of the fixing part.

[0020] Optionally, when the fixed support has the positioning stop, the positioning stop is connected to the edge of the fixed part.

[0021] Another aspect of this disclosure provides a method for measuring the tensile strength of the main bolt of the main helium blower in a high-temperature gas-cooled reactor. Using the measuring apparatus described above, the method includes:

[0022] Before the main bolt is stretched, the measuring base is placed on the stretching measuring base block, the intermediate measuring rod is lifted by the stretching measuring rod, and the first measurement value is obtained according to the indication of the displacement measuring element;

[0023] After the main bolt is stretched, the measuring base is placed on the stretching measuring base block, the intermediate measuring rod is lifted by the stretching measuring rod, and a second measurement value is obtained according to the indication of the displacement measuring element;

[0024] The tensile amount of the main bolt is calculated based on the first and second measured values.

[0025] Optionally, before the main bolt is stretched, the method further includes:

[0026] When measuring the zero position, the displacement measuring element is compressed to the measurement reference value, which serves as the measurement reference base point.

[0027] In the high-temperature gas-cooled reactor main helium blower main bolt tensile measurement device of this embodiment, the displacement measuring component is firmly fixed to the tensile measuring base block by a measuring base and a fixed support, ensuring that the measuring reference plane remains unchanged. By utilizing the fact that the displacement between the measuring reference plane on the intermediate measuring rod and the measuring reference plane of the measuring base is a constant value at the zero measurement position, the true displacement measurement of the end face of the tensile measuring rod and the end face of the tensile measuring base block before and after tensile testing is indirectly achieved, providing a reference for subsequent tensile testing. Using the measuring device of this embodiment, the tensile amount of the main bolt can be measured accurately and quickly, and the measurement method is fast and simple. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the assembly of a device for measuring the tensile strength of the main bolt of a high-temperature gas-cooled reactor main helium blower, according to an embodiment of this disclosure.

[0029] Figure 2 This is a side view of a device for measuring the tensile strength of the main bolt of the main helium blower in a hot gas-cooled reactor, according to an embodiment of this disclosure.

[0030] Figure 3 This is a schematic diagram of the structure of a measuring device for measuring the tensile amount of the main bolt of the main helium blower in a hot gas-cooled reactor according to an embodiment of the present disclosure.

[0031] Figure 4 for Figure 3 A schematic diagram of the measuring device, tensile measuring base block, and tensile measuring rod in the diagram;

[0032] Figure 5This is a schematic diagram illustrating the state of the main bolt before and after tension measurement using a device for measuring the tension of the main bolt of a hot gas-cooled reactor main helium blower, according to an embodiment of this disclosure.

[0033] Figure 6 This is a schematic flowchart illustrating a method for measuring the tensile strength of the main bolt of the main helium blower in a warm gas-cooled reactor, according to an embodiment of this disclosure.

[0034] In the picture:

[0035] 1. Measuring base; 11. First mounting hole; 12. Measuring hole; 13. Second fastening hole; 14. Fastener; 15. Mounting cylinder; 16. Fixing part; 2. Intermediate measuring rod; 21. First end of intermediate measuring rod; 22. Second end of intermediate measuring rod; 3. Fixed support; 31. Second mounting hole; 32. Cross frame; 33. Side frame; 331. First fastening hole; 332. Positioning stop; 333. Slotted groove; 334. Fixing hole; 335. Fixing component; 4. Displacement measuring component; 5. Tensile measuring base block; 6. Tensile measuring rod. Detailed Implementation

[0036] To enable those skilled in the art to better understand the technical solutions of the embodiments of this disclosure, the embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0037] like Figures 1 to 5 As shown, a device for measuring the tensile strength of the main bolt of a high-temperature gas-cooled reactor main helium blower is disclosed. The main bolt has a tensile measuring base 5 at its head and a tensile measuring rod 6 inserted into the tensile measuring base 5. The measuring device includes:

[0038] The measuring base 1 is provided with a first mounting hole 11 and a measuring hole 12 communicating with the first mounting hole 11. The first mounting hole 11 is used to connect with the tensile measuring base block 5.

[0039] The intermediate measuring rod 2 has its first end 21 movably inserted into the measuring hole 12 and able to contact the tensile measuring rod 6;

[0040] A fixed support 3 is fixed to the measuring base 1, and the fixed support 3 is provided with a second mounting hole 31 at the position corresponding to the measuring hole 12;

[0041] The displacement measuring element 4 has its first end passing through the second mounting hole 31 and abutting against the second end 22 of the intermediate measuring rod.

[0042] Specifically, such as Figure 1 and Figure 2As shown, the measuring base 1 is provided with a partition platform (not shown in the figure) having a central hole. The partition platform divides the measuring base 1 into a first mounting hole 11 and a measuring hole 12 communicating with the first mounting hole 11. The first mounting hole 11 can be cylindrical, for fitting the cylindrical tensile measuring base 5, but this is not limited. The end face of the first mounting hole 11 is precision machined to fit against the end face of the tensile measuring base 5 to form a first measuring reference surface. The end face of the first mounting hole 11 is also the end face of the partition platform facing away from the fixed support 3. The measuring base can be made of stainless steel.

[0043] Specifically, the main bolt has a hollow through hole in its axial direction, and the tensile measuring rod 6 is disposed in the through hole, such as... Figure 4 As shown, the head of the main bolt is provided with a tensile measuring base block 5, and the tensile measuring rod 6 is inserted into the tensile measuring base block 5. When the main bolt is stretched, the tensile measuring rod 6 remains stationary, while the tensile measuring base block 5 moves as the main bolt is stretched.

[0044] The intermediate measuring rod can also be made of stainless steel. The first end 21 of the intermediate measuring rod is hemispherical, and the second end 22 is a disc. The first end and the second end are connected by a cylindrical rod (not shown in the figure). Figure 2 As shown, the diameter of the disk is larger than the diameter of the hemisphere. The first end of the intermediate measuring component is movably inserted into the measuring hole 12 and can contact the tension measuring rod 6. That is, the first end 21 of the intermediate measuring rod can pass through the central hole of the partition platform through the measuring hole. The second end of the intermediate measuring component can be movably accommodated in the measuring hole 12 or moved out of the measuring hole 12. The end face of the disk at the second end of the intermediate measuring component facing the measuring base 1 is a conical surface. The conical surface matches the inner conical surface of the measuring hole 12, enabling the intermediate measuring component to automatically reset. The end face of the second end of the intermediate measuring component is precision machined into a second measuring reference surface. The measuring device of this embodiment measures the displacement difference between the second measuring reference surface and the first measuring reference surface through the displacement measuring component 4, thereby measuring the tension of the main bolt.

[0045] The fixed support 3 can also be made of stainless steel. The fixed support 3 is fixed to the measuring base 1, and the adjusted displacement measuring component 4 is reliably fixed to the fixed support, thereby increasing the stability of the measuring device.

[0046] The displacement measuring component 4 can be a dial indicator or other convenient measuring component for reading, which is not limited here. When the displacement measuring component 4 is a dial indicator, the dial indicator includes: a dial (not shown in the figure), a fixing rod (not shown in the figure), and a measuring rod (not shown in the figure), etc. The end of the measuring rod of the dial indicator passes through the second mounting hole 31 and abuts against the second end 22 of the intermediate measuring rod.

[0047] It should be noted that, when assembling the measuring device, the first end 21 of the intermediate measuring rod is inserted into the measuring hole 12, and the second end 22 of the intermediate measuring rod is accommodated in the measuring hole 12, with the first end 21 of the intermediate measuring rod extending into the first mounting hole 11; the first end of the displacement measuring element 4 is passed through the second mounting hole 31 of the fixed support 3, and the displacement measuring element 4 is adjusted so that the first end of the displacement measuring element 4 abuts against the second end 22 of the intermediate measuring rod. When the displacement measuring element 4 is a dial indicator, the measuring rod of the dial indicator is passed through the second mounting hole 31 until it abuts against the second end 22 of the intermediate measuring rod, and the position of the fixed rod in the second mounting hole 31 of the fixed support 3 is adjusted so that the dial indicator reading is L0.

[0048] Before the main bolt is stretched, as Figure 3 As shown, the measuring base 1 is placed on the tensile measuring block 5, and the end face of the first mounting hole 11 of the measuring base 1 is fitted with the end face of the tensile measuring block 5 to form a first measuring reference surface. The intermediate measuring rod is lifted by the tensile measuring rod 6, and the displacement change between the first measuring reference surface and the second measuring reference surface before the main bolt is stretched is obtained through the displacement measuring element 4. After removing the measuring device and stretching the main bolt, the measuring base 1 is placed back on the tensile measuring block 5, and similarly, the end face of the first mounting hole 11 of the measuring base 1 is fitted with the end face of the tensile measuring block 5 to form a first measuring reference surface. The intermediate measuring rod is lifted by the tensile measuring rod 6, and the displacement change between the first measuring reference surface and the second measuring reference surface after the main bolt is stretched is obtained through the displacement measuring element 4. The stretching amount of the main bolt is obtained based on the displacement changes between the first measuring reference surface and the second measuring reference surface in the two measurements.

[0049] The measuring device of this embodiment mainly overcomes the shortcomings of directly measuring the tensile strength of the main bolt of the main helium blower using a depth vernier caliper or dial indicator. It can quickly, simply, and accurately obtain the measured value. By placing the assembled measuring device on the tensile measuring base 5, the displacement change between the first and second measuring reference surfaces can be quickly obtained. The large contact area between the measuring base 1 and the tensile measuring base 5 ensures accurate and reliable measurement. After assembling the measuring device, the two ends of the intermediate measuring rod are respectively located at the first mounting hole 11 and the measuring hole 12 of the measuring base 1. After measuring the main bolt, the automatic reset function of the tapered surface of the intermediate measuring rod is used to re-detect the zero position, i.e., whether the reading of the displacement measuring element 4 is reset to L0 when the measuring device is not installed on the tensile measuring base 5 of the main bolt, ensuring the stability and reliability of the measurement reference. Utilizing the second measuring reference surface on the intermediate measuring rod, the displacement of the first measuring reference surface of the measuring base is a constant value at the zero position, indirectly realizing the actual displacement measurement of the end face of the tensile measuring rod and the end face of the tensile measuring base before and after tensile testing, which can provide a reference for the next tensile test.

[0050] As a specific example of a measuring device, such as Figure 2 As shown, the first mounting hole 11, the measuring hole 12, and the second mounting hole 31 are all coaxial.

[0051] In the measuring device of this embodiment, the second end and the first end of the intermediate measuring rod are located at the measuring hole 12 and the first mounting hole 11, respectively. The second mounting hole corresponds to the measuring hole. The first end 21 of the intermediate measuring rod can contact the tension measuring rod 6. The first mounting hole 11, the measuring hole 12, and the second mounting hole 31 are all coaxial, so that the displacement measuring element 4 can directly measure the vertical displacement of the main bolt. The measuring device has a simple structure and direct measurement.

[0052] As a specific example of a fixed support, such as Figure 1 As shown, the fixed support 3 includes: a cross frame 32 and side frames 33 disposed at both ends of the cross frame 32; the cross frame 32 spans above the measuring base 1, and the cross frame 32 is provided with the second mounting hole 31; the side frames 33 are located outside the measuring base 1, and the ends of the side frames 33 are connected to the measuring base 1.

[0053] In the fixed support 3 of this embodiment, the side frame 33 is formed by extending along the same side from both ends of the cross frame 32, and the second mounting hole 31 can be set in the central area of ​​the cross frame 32. This ensures the stability of the displacement measuring component when it is fixed. The fixed support has a simple structure and is easy to manufacture.

[0054] As a specific example of a fixed support, the end of the side frame 33 is provided with a first fastening hole 331, and the outer side wall of the measuring base 1 is provided with a second fastening hole 13 corresponding to the first fastening hole 331, so that the fixed support 3 and the measuring base 1 can be fixedly connected by fasteners 14 passing through the first fastening hole 331 and the second fastening hole 13.

[0055] Specifically, multiple first fastening holes can be provided, such as... Figure 1 As shown, the side frame is provided with two first fastening holes, and the outer wall of the measuring base is provided with two second fastening holes corresponding to the first fastening holes. The first fastening holes and the second fastening holes can be fixed by fasteners. The fasteners can be fastening screws. Using fastening screws to fix the fixed support to the measuring base facilitates disassembly and assembly, and the structure is stable after the measuring device is assembled.

[0056] As a specific example of a fixed support, the inner side of the side frame 33 is provided with an inwardly recessed positioning stop 332, which is provided on the measuring base 1 and is used to limit the fixed support 3.

[0057] like Figure 1 and Figure 2 As shown, during the assembly of the measuring device, the positioning stop can be engaged on the measuring base to limit the fixing support, facilitating the alignment and fixing of the first fastening hole with the second fastening hole. The positioning stop structure of this embodiment is simple, easy to manufacture, and simplifies positioning during the assembly of the measuring device.

[0058] As a specific example of a fixed support, the crossbeam 32 has a slot 333 on both radial sides of the second mounting hole 31 along its length; the side of the crossbeam 32 and the slot 333 are respectively provided with fixing holes 334, so that the fixing members 335 passing through the fixing holes 334 from opposite directions can fix the displacement measuring member 4 to the fixed support 3.

[0059] like Figure 1 As shown, fixing holes 334 are respectively provided on both sides of the second mounting hole 31. The fixing component can be a fastening screw. The size of the second mounting hole can be adjusted through the slot, allowing the displacement measuring component to move within the second mounting hole. After the first end of the displacement measuring component passes through the second mounting hole and the displacement measuring component is adjusted to a suitable position, it can be fixedly connected to the fixed support using the fastening screw. When the displacement measuring component is a dial indicator, the fixing rod is fixed to the second mounting hole. The adjusted dial indicator is reliably fixed to the fixed bracket from two directions using double fastening screws.

[0060] As a specific example of a measuring base, the measuring base 1 includes: a mounting cylinder 15 and a fixing part 16 disposed on both symmetrical sides of the mounting cylinder 15; the mounting cylinder 15 has a first mounting hole 11 and a measuring hole 12 disposed in the central region; the mounting cylinder 15 is flush with the first end of the fixing part 16; and the second end of the mounting cylinder 15 is shorter than the second end of the fixing part 16.

[0061] Specifically, the mounting cylinder and the fixing part can be an integral structure, the mounting cylinder can be cylindrical, the measuring hole is near the first end of the mounting cylinder, and the first mounting hole is near the second end of the mounting cylinder. For example... Figure 4 As shown, the portions of the two fixed parts extending beyond the mounting cylinder can span across both sides of the end of the main bolt to prevent the measuring device from rotating and improve measurement stability.

[0062] As a specific example of a measuring base, when the fixed support 3 has the positioning stop 332, the positioning stop 332 abuts against the edge of the fixed part 16.

[0063] Specifically, the outer side of the fixing part can have the same shape as the positioning stop so as to achieve the abutment between the positioning stop and the fixing part.

[0064] Another aspect of this disclosure provides a method for measuring the tensile strength of the main bolt of the main helium blower in a high-temperature gas-cooled reactor. For example... Figure 6 As shown, using the measuring device described above, method S100 includes:

[0065] Step S110: Before the main bolt is stretched, the measuring base is placed on the stretching measuring base block, the intermediate measuring rod is lifted by the stretching measuring rod, and the first measurement value is obtained according to the indication of the displacement measuring element.

[0066] Specifically, before the main bolt is stretched, the distance between the end face of the stretching measuring base 5 and the end face of the stretching measuring rod 6 is less than the distance between the end of the first end of the intermediate measuring rod and the first measuring reference surface. Thus, by placing the measuring base 1 on the stretching measuring base 5, the intermediate measuring rod can be lifted by the stretching measuring rod 6, allowing the measurement of the relative displacement value of the end face of the second end 22 of the intermediate measuring rod before stretching, i.e., the first measured value L. 前 Since there are multiple main bolts, they can be numbered sequentially, and the tensile strength of each main bolt can be measured in turn to obtain the first measured value L before tensile strength of the corresponding main bolt. 前 The displacement measuring component 4 of the measuring device is firmly fixed. After measuring one of the main bolts, the first measuring reference surface and the second measuring reference surface do not change when the measurement is at the zero position. The measuring device can then find the measuring reference again and continue measuring.

[0067] After measuring the first value of all main bolts before tension, the measuring device is removed.

[0068] Step S120: After the main bolt is stretched, the measuring base is placed on the stretching measuring base block, the intermediate measuring rod is lifted by the stretching measuring rod, and the second measurement value is obtained according to the indication of the displacement measuring element.

[0069] Specifically, after the main bolt is stretched, the distance between the end face of the stretching measuring base 5 and the end face of the stretching measuring rod 6 is less than the distance between the end of the first end of the intermediate measuring rod and the first measuring reference surface. Similarly, the measuring base 1 is placed on the stretching measuring base 5, the intermediate measuring rod is lifted by the stretching measuring rod 6, and the second measured value L is obtained according to the indication of the displacement measuring element 4. 后 Here, stretching the main bolt can be either pulling it out or inserting it.

[0070] Step S130: Calculate the tensile amount of the main bolt based on the first measurement value and the second measurement value.

[0071] Specifically, the first measured value L 前 With the second measured value L 后 Subtracting the two values ​​gives the amount of tension on the main bolt.

[0072] In the measurement method of this embodiment, the measuring device is first assembled, the displacement measuring component 4 is adjusted and fixed in the fixed support 3, and the first end of the displacement measuring component 4 can abut against the second end 22 of the intermediate measuring rod. The measuring device has a simple structure and is easy to install. It only requires setting the measuring base on the tension measuring base block, and the tension of the main bolt can be measured using the movable intermediate measuring rod. The measurement method is simple, and the measuring device fixes the first measuring reference plane, making the measurement more accurate.

[0073] As a specific example of the measurement method, the method further includes, prior to the main bolt being stretched:

[0074] When measuring the zero position, the displacement measuring element is compressed to the measurement reference value, which serves as the measurement reference base point.

[0075] Specifically, the measurement zero point refers to the measurement reference value L0 indicated by the displacement measuring component when the measuring device is compressed after assembly and not in use. This value serves as the measurement reference point, meaning the measuring device is located at the reference position. The measurement zero point can be adjusted by the displacement measuring component according to actual conditions.

[0076] like Figure 5 As shown, Figure a is a state diagram of the measuring device before the main bolt is stretched, Figure b is a state diagram of the measuring device in the reference position, and Figure c is a state diagram of the measuring device after the main bolt is stretched. When the measuring device is in the reference position, the intermediate measuring rod automatically resets in the measuring base 1. The end face position of the second end 22 of the intermediate measuring rod remains unchanged before and after the measurement. The displacement measuring element 4 indicates the measurement reference value L0, which can be used as a self-checking reference for each subsequent measurement. After each measurement, the stability and reliability of the measurement reference are ensured by checking whether the measurement reference value L0 of the displacement measuring element has reset.

[0077] Before tensioning the main bolt, when the measuring device is placed on the tension measuring base block 5, the intermediate measuring rod is lifted by the tension measuring rod 6. When the displacement measuring component 4 is a dial indicator, the dial indicator reading increases from L0 to L. 前 .

[0078] After the main bolt is stretched, when the measuring device is placed on the tensile measuring base block 5, the middle measuring rod is lifted by the tensile measuring rod 6. However, due to the stretching of the main bolt, the second end of the tensile measuring rod 6 relatively descends, as shown in the image. Figure 5 As shown in Figure c, the dial gauge reading increases from L0 to L 后 L 前 With L 后 The difference is the amount of tension of the main bolt. Comparing the main bolt before and after tension, it can be found that the end face of the second end 22 of the intermediate measuring rod is relatively lowered after tension, that is, the main bolt is lowered and put into the bolt hole to seal the main helium blower.

[0079] The amount of tension of the main bolt is calculated based on the measured values ​​before and after tensioning.

[0080] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the embodiments of this disclosure, and the embodiments of this disclosure are not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the embodiments of this disclosure, and these modifications and improvements are also considered to be within the protection scope of the embodiments of this disclosure.

Claims

1. A device for measuring the tensile strength of a main bolt of a high-temperature gas-cooled reactor main helium blower, wherein the head of the main bolt is provided with a tensile measuring base block and a tensile measuring rod inserted into the tensile measuring base block, characterized in that, The measuring device includes: A measuring base is provided with a first mounting hole and a measuring hole communicating with the first mounting hole, the first mounting hole being used to connect with the tensile measuring base block; An intermediate measuring rod, the first end of which is movably inserted into the measuring hole and can contact the tensile measuring rod; A fixed support is fixed to the measuring base, and the fixed support is provided with a second mounting hole at the position corresponding to the measuring hole; A displacement measuring element, wherein the first end of the displacement measuring element passes through the second mounting hole and abuts against the second end of the intermediate measuring rod.

2. The measuring device according to claim 1, characterized in that, The first mounting hole, the measuring hole, and the second mounting hole are all coaxial.

3. The measuring device according to claim 1, characterized in that, The fixed support includes: a cross frame and side frames disposed at both ends of the cross frame; The crossbeam is straddling the measuring base, and the crossbeam is provided with the second mounting hole; The side frame is located outside the measuring base, and the end of the side frame is connected to the measuring base.

4. The measuring device according to claim 3, characterized in that, The end of the side frame is provided with a first fastening hole, and the outer side wall of the measuring base is provided with a second fastening hole corresponding to the first fastening hole, so as to fix the fixed support to the measuring base by fasteners passing through the first fastening hole and the second fastening hole.

5. The measuring device according to claim 4, characterized in that, The inner side of the side frame is provided with an inwardly recessed positioning stop, which is located on the measuring base and is used to limit the fixed support.

6. The measuring device according to claim 4, characterized in that, The crossbar is provided with slots on both radial sides of the second mounting hole along its length. The side of the cross frame and the corresponding slot are respectively provided with fixing holes, so that the fixing members can be inserted into the fixing holes from opposite directions to fix the displacement measuring member to the fixing support.

7. The measuring device according to any one of claims 1 to 6, characterized in that, The measuring base includes: a mounting cylinder and a fixing part disposed on both symmetrical sides of the mounting cylinder; The mounting cylinder has the first mounting hole and the measuring hole in its central area. The mounting cylinder is flush with the first end of the fixing part, and the second end of the mounting cylinder is shorter than the second end of the fixing part.

8. The measuring device according to claim 7, characterized in that, When the fixed support has a positioning stop, the positioning stop abuts against the edge of the fixed part.

9. A method for measuring the tensile strength of the main bolt of the main helium blower in a high-temperature gas-cooled reactor, characterized in that... The method, using the measuring apparatus according to any one of claims 1 to 8, comprises: Before the main bolt is stretched, the measuring base is placed on the stretching measuring base block, the intermediate measuring rod is lifted by the stretching measuring rod, and the first measurement value is obtained according to the indication of the displacement measuring element; After the main bolt is stretched, the measuring base is placed on the stretching measuring base block, the intermediate measuring rod is lifted by the stretching measuring rod, and a second measurement value is obtained according to the indication of the displacement measuring element; The tensile amount of the main bolt is calculated based on the first and second measured values.

10. The measurement method according to claim 9, characterized in that, Before the main bolt is stretched, the method further includes: When measuring the zero position, the displacement measuring element is compressed to the measurement reference value, which serves as the measurement reference base point.

Images