Measuring device and method for deformation of containment bottom plate of nuclear power plant

Abstract

The invention relates to a measuring device and a measuring method for the deformation of a bottom plate of a containment vessel of a nuclear power plant. The measuring device comprises: an elevation transmission device, comprising a bottom bracket, a top bracket, and an intermediate transmission unit, wherein the bottom bracket is arranged at the same height as the bottom plate, the top bracket is arranged at the opening of a prestressed annular gallery, and the intermediate transmission unit measures the horizontal displacement between the top bracket and the bottom bracket; a settlement measurement device, comprising a first deformation measurement device, a second deformation measurement device, and a third deformation measurement device, for respectively measuring the settlement values ​​of each measurement point and the bottom bracket and the top bracket; a reference measurement device is arranged at a topographic measurement reference point; an exhaust water adding device is used for filling water into the first deformation measurement device and the second deformation measurement device; a collection device is used for collecting the measurement values ​​corresponding to the measurement device; a level is used for measuring the elevation values ​​of the reference measurement device and the second deformation measurement device; and a processing device is used for calculating the elevation value of the Nth measurement point of the bottom plate.

Description

Technical Field

[0001] The present invention relates to the field of nuclear power, and more particularly to a device and method for measuring deformation of a containment bottom plate of a nuclear power plant. Background Art

[0002] The containment is the third safety barrier of a nuclear power plant. As a prestressed concrete structure, regular deformation measurements are required to ensure that the containment structure is in normal service condition.

[0003] In the past, the deformation measurement of raft foundation was carried out in the following ways:

[0004] 1) Manual measurement using geometric leveling and trigonometric height measurement methods. This measurement method can measure the elevation information of the location point while measuring the deformation. It requires the cooperation of professional surveyors and is greatly affected by human factors;

[0005] 2) Measurements are made using sensors embedded in concrete during construction. The sensors embedded in concrete are fixed in position and cannot be repaired if damaged.

[0006] Previous deformation measurement methods have the following technical deficiencies:

[0007] 1) Geometric leveling and trigonometric height measurement are used manually. The measurement accuracy of this method is greatly affected by human factors and instrument accuracy.

[0008] 2) It is impossible to achieve real-time monitoring, the measurement frequency is very low, and it is impossible to conduct trend analysis based on the test data in real time;

[0009] 3) The deformation measurement position of the containment bottom plate is located at -12.45m of the nuclear power plant. The measurement process requires elevation transfer, which consumes a lot of manpower, has high work risks and low measurement efficiency;

[0010] 4) The embedded sensors in the structure can accurately measure the structural deformation, but they cannot reflect the deformation value and elevation value, so they need to be converted;

[0011] 5) The embedded sensors in the structure are arranged in fixed positions, and some locations have few measurement points, resulting in measurement blind areas;

[0012] 6) It is difficult to calibrate the embedded sensors in the structure, and they cannot be repaired after being damaged to continue to perform the measurement function. Summary of the invention

[0013] The technical problem to be solved by the present invention is to provide a device and method for measuring the deformation of the bottom plate of a nuclear power plant containment vessel in view of the above-mentioned defects of the prior art.

[0014] The technical solution adopted by the present invention to solve the technical problem is: construct a device for measuring the deformation of the bottom plate of the containment of a nuclear power plant, comprising:

[0015] The elevation transmission device comprises a bottom bracket, a top bracket, and an intermediate transmission unit connected between the bottom bracket and the top bracket, wherein the bottom bracket is arranged at the same height as the bottom plate, the top bracket is arranged at a prestressed gallery opening higher than the bottom plate, and the intermediate transmission unit measures the horizontal displacement between the top bracket and the bottom bracket;

[0016] The settlement measuring device comprises a first deformation measuring device at least twelve measuring points distributed on the circumference of the bottom plate, a second deformation measuring device arranged on the bottom bracket, and a third deformation measuring device arranged on the top bracket, so as to respectively measure the settlement values ​​of each of the measuring points, the bottom bracket and the top bracket;

[0017] A reference measuring device is arranged at a topographic measuring reference point outside the opening of the prestressed corridor;

[0018] An exhaust and water adding device, used for filling water into the first deformation measuring device and the second deformation measuring device;

[0019] A collection device, used to collect the corresponding initial liquid level measurement values ​​B measured by the first deformation measuring device, the second deformation measuring device, and the third deformation measuring device t0 , initial angle measurement value θ t0 , initial height measurement value h t0 , and the displacement value h between the bottom bracket and the top bracket 高传t0 ;

[0020] A level, used to measure the elevation value H of the reference measuring device and the second deformation measuring device 基准t0 , H 底板参考t0 ;as well as

[0021] The processing device obtains the deformation measurement results of the Nth measurement point and the N-1th measurement point of the containment bottom plate at time t1 as follows:

[0022] Δ H(N、N-1)t1 =(B 点(N-1)t1 -B 点(N-1)t0 )-(B 点Nt1 -B 点Nt0 );

[0023] And according to H 底板参考t1 =H 底板参考t0 +h 高传t1 -h 高传t0 +Δ H(顶板参考、基准装置)t1 , the elevation value of the Nth measuring point on the bottom plate of the containment at time t1 is obtained as:

[0024] H 点Nt1 =H 底板参考t1 +h 底板参考t1 cosθ 底板参考t1 +B 底板参考t1 -h 点Nt1 cosθ 点Nt1 -B 点Nt1 .

[0025] Preferably, the first deformation measuring device is fixedly mounted on the bottom plate, the second deformation measuring device is fixedly mounted on the bottom bracket, the third deformation measuring device is fixedly mounted on the top plate, and the reference measuring device is fixedly mounted on a topographic measurement reference point.

[0026] Preferably, the first deformation measuring device comprises a first bracket, a first liquid storage barrel, a first leveling device, a first liquid level sensor, a first angle sensor, and a first displacement sensor, wherein the first liquid storage barrel, the first leveling device, and the first displacement sensor are arranged on the first bracket, the first liquid level sensor is arranged in the first liquid storage barrel, and the first angle sensor is arranged on the side wall of the first liquid storage barrel;

[0027] The second deformation measuring device includes a second liquid storage barrel, a second leveling device, a second liquid level sensor, a second angle sensor, and a second displacement sensor, wherein the second liquid storage barrel, the second leveling device, and the second displacement sensor are arranged on the bottom bracket, the second liquid level sensor is arranged in the second liquid storage barrel, and the second angle sensor is arranged on the side wall of the second liquid storage barrel;

[0028] The third deformation measuring device includes a third liquid storage barrel, a third leveling device, a third liquid level sensor, a third angle sensor, and third and fourth displacement sensors. The third liquid storage barrel, the third leveling device, and the third and fourth displacement sensors are arranged on the top bracket, the third liquid level sensor is arranged in the third liquid storage barrel, and the third angle sensor is arranged on the side wall of the third liquid storage barrel.

[0029] Preferably, the reference measuring device has the same structure as the first deformation measuring device.

[0030] Preferably, the intermediate transmission unit includes a rigid long rod, a fourth displacement sensor, and a tensioner connected from top to bottom, the rigid long rod is connected to the top bracket, and the tensioner is connected to the bottom bracket, so that the second deformation measuring device and the third deformation measuring device can measure the horizontal displacement between the top bracket and the bottom bracket.

[0031] Preferably, the bottom bracket is provided with an anchor point connected to the tensioner.

[0032] Preferably, the exhaust and water adding device includes a water replenishment barrel, a water filling pump, a water filling tee, and a return water tee. One end of the water filling tee is connected to the water replenishment barrel through the water filling pump, and the other two ends of the water filling tee are respectively connected to the first liquid storage barrel of the first deformation measuring device, and the second liquid storage barrel of the second deformation measuring device, the third liquid storage barrel of the third deformation measuring device, and the liquid storage barrel of the reference measuring device. One end of the return water tee is connected to the water replenishment barrel, and the other two ends of the return water tee are respectively connected to the bottom of the first liquid storage barrel of the first deformation measuring device, and the bottom of the second liquid storage barrel of the second deformation measuring device, the third liquid storage barrel of the third deformation measuring device, and the bottom of the fourth liquid storage barrel of the reference measuring device.

[0033] A measuring method using the device for measuring deformation of a containment bottom plate of a nuclear power plant comprises the following steps:

[0034] The first deformation measuring device, the second deformation measuring device, and the third deformation measuring device respectively measure the corresponding initial liquid level measurement value B t0 , initial angle measurement value θ t0 , initial height measurement value h t0 , and the displacement value h between the bottom bracket and the top bracket 高传t0 , and collected by the collection device;

[0035] The level instrument measures the elevation value H of the reference measuring device and the second deformation measuring device. 基准t0 , H 底板参考t0 ;

[0036] The processing device obtains the deformation measurement results of the Nth measurement point and the N-1th measurement point of the containment bottom plate at time t1 as follows:

[0037] Δ H(N、N-1)t1 =(B 点(N-1)t1 -B 点(N-1)t0 )-(B 点Nt1 -B 点Nt0 );

[0038] And according to H 底板参考t1 =H 底板参考t0 +h 高传t1 -h 高传t0 +Δ H(顶板参考、基准装置)t1 , the elevation value of the Nth measuring point on the bottom plate of the containment at time t1 is obtained as:

[0039] H 点Nt1 =H 底板参考t1 +h 底板参考t1 cosθ 底板参考t1 +B 底板参考t1 -h 点Nt1 cosθ 点Nt1 -B点Nt1 .

[0040] Preferably, the exhaust and water adding device stops filling the first deformation measuring device and the second deformation measuring device with water to 0.5Ha, where Ha is the full scale value measured by the liquid storage tank.

[0041] Preferably, the first deformation measuring device, the second deformation measuring device and the third deformation measuring device respectively collect angle information through the first angle sensor, the second angle sensor and the third angle sensor. If the angle information does not meet the requirements, the collecting device will alarm. According to the alarm information, the first leveling device, the second leveling device and the third leveling device are used to perform leveling operations respectively. After leveling, the collecting device performs re-detection.

[0042] The measuring device and method for the deformation of the bottom plate of the containment vessel of a nuclear power plant implemented in the present invention have the following beneficial effects: the deformation of the bottom plate of the containment vessel of a nuclear power plant is measured by the measuring device of this patent, electronic measurement technology, signal acquisition technology and signal processing technology are adopted, and sensors and microcontroller circuits are used to replace the previous methods for measurement, and the on-site use effect is good, so as to avoid the deficiencies in previous tests and improve the deformation measurement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0044] Figure 1 It is a schematic diagram of the installation of a device for measuring the deformation of a bottom plate of a containment vessel of a nuclear power plant in an embodiment of the present invention;

[0045] Figure 2 yes Figure 1 A schematic structural diagram of the first deformation measuring device;

[0046] Figure 3 Schematic diagram of the principle of a device for measuring deformation of a bottom plate of a containment vessel of a nuclear power plant in an embodiment of the present invention;

[0047] Figure 4 It is a system connection diagram of a device for measuring deformation of a bottom plate of a containment vessel of a nuclear power plant in an embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0049] like Figures 1 to 4 As shown, a device for measuring the deformation of the bottom plate 6 of the containment vessel of a nuclear power plant in a preferred embodiment of the present invention includes an elevation transfer device 1, a settlement measurement device 8, a reference measurement device 2, an exhaust and water adding device 3, a collection device 4, a level, and a processing device 5.

[0050] The elevation transfer device 1 includes a bottom bracket 11, a top bracket 12, and an intermediate transfer unit 13 connected between the bottom bracket 11 and the top bracket 12. The bottom bracket 11 is arranged at the same height as the bottom plate 6, and the top bracket 12 is arranged at the prestressed corridor opening 7 higher than the bottom plate 6. The intermediate transfer unit 13 measures the horizontal displacement between the top bracket 12 and the bottom bracket 11.

[0051] The settlement measuring device 8 includes a first deformation measuring device 81 at at least twelve measuring points distributed around the bottom plate 6, a second deformation measuring device 82 arranged on the bottom bracket 11, and a third deformation measuring device 83 arranged on the top bracket 12, so as to respectively measure the settlement values ​​of each measuring point and the bottom bracket 11 and the top bracket 12.

[0052] The reference measuring device 2 is set at a topographic measurement reference point outside the prestressed corridor opening 7. In some embodiments, the bottom bracket 11 and the bottom plate 6 are set at -12.5 meters of the nuclear power plant, and the reference measuring device 2 and the top bracket 12 are set at -6.7 meters of the nuclear power plant. The deformation of the bottom plate 6 is calculated based on the test data at different heights.

[0053] The exhaust and water adding device 3 is used to fill water into the first deformation measuring device 81 and the second deformation measuring device 82, so that the first deformation measuring device 81 and the second deformation measuring device 82 can respectively measure the liquid level, angle, displacement and other data at the corresponding positions to assist in subsequent calculations.

[0054] The acquisition device 4 is used to acquire the corresponding initial liquid level measurement values ​​B measured by the first deformation measuring device 81, the second deformation measuring device 82, and the third deformation measuring device 83. t0 , initial angle measurement value θ t0 , initial height measurement value h t0 , and the displacement value h between the bottom bracket 11 and the top bracket 12 高传t0 .

[0055] The level is used to measure the elevation value H of the reference measuring device 2 and the second deformation measuring device 82. 基准t0 , H 底板参考t0 .

[0056] The processing device 5 obtains the deformation measurement results of the Nth measurement point and the N-1th measurement point of the containment bottom plate 6 at time t1 as follows:

[0057] Δ H(N、N-1)t1 =(B 点(N-1)t1 -B 点(N-1)t0 )-(B 点Nt1 -B 点Nt0 );

[0058] And according to H底板参考t1 =H 底板参考t0 +h 高传t1 -h 高传t0 +Δ H顶板参考、基准装置t1 , the elevation value of the Nth measuring point of the containment bottom plate 6 at time t1 is obtained as:

[0059] H 点Nt1 =H 底板参考t1 +h 底板参考t1 cosθ 底板参考t1 +B 底板参考t1 -h 点Nt1 cosθ 点Nt1 -B 点Nt1 .

[0060] The deformation of the bottom plate 6 of the containment vessel of a nuclear power plant is measured by the measuring device of this patent. Electronic measurement technology, signal acquisition technology and signal processing technology are adopted, and sensors and microcontroller circuits are used to replace the previous methods for measurement. The on-site use effect is good, so as to avoid the shortcomings in previous tests and improve the deformation measurement efficiency.

[0061] Preferably, the first deformation measuring device 81 is fixedly mounted on the bottom plate 6, the second deformation measuring device 82 is fixedly mounted on the bottom bracket 11, the third deformation measuring device 83 is fixedly mounted on the top plate, and the reference measuring device 2 is fixedly mounted on the topographic measurement reference point. In some embodiments, the above fixed installation method can be connected and fixed by impact drilling or gluing to ensure a stable connection between the two.

[0062] Furthermore, the first deformation measuring device 81 includes a first bracket 811, a first liquid storage barrel 812, a first leveling device 813, a first liquid level sensor 814, a first angle sensor 815, and a first displacement sensor 816. The first liquid storage barrel 812, the first leveling device 813, and the first displacement sensor 816 are arranged on the first bracket 811, the first liquid level sensor 814 is arranged in the first liquid storage barrel 812, and the first angle sensor 815 is arranged on the side wall of the first liquid storage barrel 812.

[0063] The second deformation measuring device 82 includes a second liquid storage barrel, a second leveling device, a second liquid level sensor, a second angle sensor, and a second displacement sensor. The second liquid storage barrel, the second leveling device, and the second displacement sensor are arranged on the bottom bracket 11, the second liquid level sensor is arranged in the second liquid storage barrel, and the second angle sensor is arranged on the side wall of the second liquid storage barrel.

[0064] The third deformation measuring device 83 includes a third liquid storage barrel, a third leveling device, a third liquid level sensor, a third angle sensor, and third and fourth displacement sensors 132. The third liquid storage barrel, the third leveling device, and the third and fourth displacement sensors 132 are arranged on the top bracket 12, the third liquid level sensor is arranged in the third liquid storage barrel, and the third angle sensor is arranged on the side wall of the third liquid storage barrel.

[0065] Preferably, the second deformation measuring device 82 and the third deformation measuring device 83 have the same structure as the first deformation measuring device 81, and the data such as the measured liquid level, angle, displacement, etc. corresponding to each sensor of each deformation measuring device are collected electronically, and the measurement data is accurate and comprehensive, and the data is more accurate and stable.

[0066] The reference measuring device 2 has the same structure as the first deformation measuring device 81 , and corresponds to measuring the deformation of the topographic measurement reference point outside the prestressed corridor opening 7 , which can be used as a reference value.

[0067] Furthermore, the intermediate transmission unit 13 includes a rigid long rod 131, a fourth displacement sensor 132, and a tensioner 133 connected from top to bottom, the rigid long rod 131 is connected to the top bracket 12, and the tensioner 133 is connected to the bottom bracket 11, so that the second deformation measuring device 82 and the third deformation measuring device 83 can measure the horizontal displacement between the top bracket 12 and the bottom bracket 11.

[0068] Preferably, the bottom bracket 11 is provided with an anchor point to connect with the tensioner 133 to make the connection more stable and avoid affecting the test data.

[0069] Preferably, in this embodiment, the exhaust water adding device 3 includes a water replenishing barrel 31, a water filling pump 32, a water filling tee 33, and a water return tee 34. One end of the water filling tee 33 is connected to the water replenishing barrel 31 through the water filling pump 32, and the other two ends of the water filling tee 33 are respectively connected to the first liquid storage barrel 812 of the first deformation measuring device 81, and the second liquid storage barrel of the second deformation measuring device 82, the third liquid storage barrel of the third deformation measuring device 83, and the fourth liquid storage barrel of the reference measuring device 2.

[0070] Liquid is stored in the water replenishment barrel 31, and the liquid can be transported to the first liquid storage barrel 812, the second liquid storage barrel, and the third liquid storage barrel respectively through the water filling pump 32, and the liquid level is measured by each liquid level sensor respectively. The filling is stopped after the water is filled to 0.5Ha, and Ha is the full scale value measured by each liquid storage barrel, thereby improving stability and accuracy.

[0071] In addition, one end of the return tee 34 is connected to the water replenishment barrel 31, and the other two ends of the return tee 34 are respectively connected to the bottom of the first liquid storage barrel 812 of the first deformation measuring device 81, and the bottom of the second liquid storage barrel of the second deformation measuring device 82, the third liquid storage barrel of the third deformation measuring device 83, and the bottom of the fourth liquid storage barrel of the reference measuring device 2. After the test is completed, the liquid in each liquid storage barrel can flow back to the water replenishment barrel 31.

[0072] Furthermore, the first liquid storage tank 812, the second liquid storage tank, the third liquid storage tank, and the fourth liquid storage tank are connected using PU connecting pipes to allow the pipes to transport liquid.

[0073] In another embodiment of the present invention, a measurement method using a measurement device for measuring the deformation of a containment bottom plate 6 of a nuclear power plant comprises the following steps:

[0074] The first deformation measuring device 81, the second deformation measuring device 82, and the third deformation measuring device 83 respectively measure the corresponding initial liquid level measurement value B t0 , initial angle measurement value θ t0 , initial height measurement value h t0 , and the displacement value h between the bottom bracket 11 and the top bracket 12 高传t0 , and collected by the collection device 4;

[0075] The level instrument measures the elevation value H of the reference measuring device 2 and the second deformation measuring device 82 基准t0 , H 底板 refer to t0 ,

[0076] The processing device 5 obtains the deformation measurement results of the Nth measurement point and the N-1th measurement point of the containment bottom plate 6 at time t1 as follows:

[0077] Δ H(N、N-1)t1 =(B 点(N-1)t1 -B 点(N-1)t0 )-(B 点Nt1 -B 点Nt0 );

[0078] And according to H 底板参考t1 =H 底板参考t0 +h 高传t1 -h 高传t0 +Δ H顶板参考、基准装置t1 , the elevation value of the Nth measuring point of the containment bottom plate 6 at time t1 is obtained as:

[0079] H 点Nt1 =H 底板参考t1 +h 底板参考t1 cosθ 底板参考t1 +B 底板参考t1 -h 点Nt1 cosθ点Nt1 -B 点Nt1 .

[0080] Preferably, the exhaust and water adding device 3 stops filling the first deformation measuring device 81 and the second deformation measuring device 82 with water to 0.5Ha, where Ha is the full scale value measured by each liquid storage tank, to improve stability and accuracy.

[0081] The first deformation measuring device 81, the second deformation measuring device 82, and the third deformation measuring device 83 respectively collect angle information through the first angle sensor 815, the second angle sensor, and the third angle sensor. If the angle information does not meet the requirements, the collecting device 4 will alarm. According to the alarm information, the first leveling device 813, the second leveling device, and the third leveling device are used to perform leveling operations. After leveling, the collecting device 4 performs re-detection.

[0082] Innovations of this application:

[0083] 1) Reduce the workload of personnel in building settlement monitoring, use high-precision acquisition components for measurement substitution, and reduce the impact of human factors and instrument accuracy on measurement accuracy;

[0084] 2) In addition to monitoring the deformation value of the containment bottom plate 6, the elevation value of each monitoring point at the containment bottom plate 6 can be directly measured;

[0085] 3) When there is a large height difference, accurate transmission of elevation measurement values ​​is achieved;

[0086] 4) All measurement data can be monitored in real time, and the detection data can be automatically used for trend analysis;

[0087] 5) The device is assembled, making on-site measurement simple;

[0088] 6) The device can automatically measure the level and automatically fill with water;

[0089] 7) The relevant sensors are external, which is convenient for calibration;

[0090] 8) This method replaces the previous manual measurement method, simplifying the work that required the cooperation of two people to be completed by one person.

[0091] It can be understood that the above-mentioned technical features can be used in any combination without limitation.

[0092] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A device for measuring deformation of a containment bottom plate of a nuclear power plant, characterized in that: include: The elevation transmission device (1) comprises a bottom bracket (11), a top bracket (12), and an intermediate transmission unit (13) connected between the bottom bracket (11) and the top bracket (12), wherein the bottom bracket (11) is arranged at the same height as the bottom plate (6), the top bracket (12) is arranged at a prestressed corridor opening (7) higher than the bottom plate (6), and the intermediate transmission unit (13) measures the horizontal displacement between the top bracket (12) and the bottom bracket (11); The settlement measuring device (8) comprises a first deformation measuring device (81) at least twelve measuring points distributed in the circumferential direction of the bottom plate (6), a second deformation measuring device (82) arranged on the bottom bracket (11), and a third deformation measuring device (83) arranged on the top bracket (12), so as to respectively measure the settlement values ​​of each of the measuring points and the bottom bracket (11) and the top bracket (12); A reference measuring device (2) is arranged at a topographic measuring reference point outside the prestressed gallery opening (7); An exhaust water adding device (3) used for filling water into the first deformation measuring device (81) and the second deformation measuring device (82); A collection device (4) for collecting corresponding initial liquid level measurement values ​​B measured by the first deformation measuring device (81), the second deformation measuring device (82), and the third deformation measuring device (83) t0 , initial angle measurement value θ t0 , initial height measurement value h t0 , and the displacement value h between the bottom bracket (11) and the top bracket (12) 高传t0 ; A level, used to measure the elevation value H of the reference measuring device (2) and the second deformation measuring device (82) 基准t0 , H 底板参考t0 ;as well as The processing device (5) obtains deformation measurement results of the Nth measurement point and the N-1th measurement point of the containment bottom plate (6) at time t1 as follows: D H（N、N-1）t1 =(B 点（N-1）t1 -B 点（N-1）t0 )-(B) 点Nt1 -B 点Nt0 ); And according to H 底板参考t1 =H 底板参考t0 +h 高传t1 -h 高传t0 +Δ H（顶板参考、基准装置）t1 , the elevation value of the Nth measuring point on the containment bottom plate (6) at time t1 is obtained as: H 点Nt1 =H 底板参考t1 +h 底板参考t1 cosθ 底板参考t1 +B 底板参考t1 -h 点Nt1 cosθ 点Nt1 -B 点Nt1； The intermediate transmission unit (13) comprises a rigid long rod (131), a fourth displacement sensor (132), and a tensioner (133) connected from top to bottom, the rigid long rod (131) being connected to the top bracket (12), and the tensioner (133) being connected to the bottom bracket (11), so that the second deformation measuring device (82) and the third deformation measuring device (83) can measure the horizontal displacement between the top bracket (12) and the bottom bracket (11); The first deformation measuring device (81) comprises a first bracket (811), a first liquid storage barrel (812), a first leveling device (813), a first liquid level sensor (814), a first angle sensor (815), and a first displacement sensor (816); the first liquid storage barrel (812), the first leveling device (813), and the first displacement sensor (816) are arranged on the first bracket (811); the first liquid level sensor (814) is arranged in the first liquid storage barrel (812); and the first angle sensor (815) is arranged on a side wall of the first liquid storage barrel (812); The second deformation measuring device (82) comprises a second liquid storage barrel, a second leveling device, a second liquid level sensor, a second angle sensor, and a second displacement sensor, wherein the second liquid storage barrel, the second leveling device, and the second displacement sensor are arranged on the bottom bracket (11), the second liquid level sensor is arranged in the second liquid storage barrel, and the second angle sensor is arranged on the side wall of the second liquid storage barrel; The third deformation measuring device (83) comprises a third liquid storage barrel, a third leveling device, a third liquid level sensor, a third angle sensor, and third and fourth displacement sensors (132); the third liquid storage barrel, the third leveling device, and the third and fourth displacement sensors (132) are arranged on the top bracket (12); the third liquid level sensor is arranged in the third liquid storage barrel; and the third angle sensor is arranged on the side wall of the third liquid storage barrel.

2. The device for measuring deformation of the bottom plate of the containment vessel of a nuclear power plant according to claim 1, characterized in that: The first deformation measuring device (81) is fixedly mounted on the bottom plate (6), the second deformation measuring device (82) is fixedly mounted on the bottom bracket (11), the third deformation measuring device (83) is fixedly mounted on the top plate, and the reference measuring device (2) is fixedly mounted on a topographic measurement reference point.

3. The device for measuring deformation of the bottom plate of the containment vessel of a nuclear power plant according to claim 1, characterized in that: The reference measuring device (2) has the same structure as the first deformation measuring device (81).

4. The device for measuring deformation of the bottom plate of the containment vessel of a nuclear power plant according to claim 1, characterized in that: The bottom bracket (11) is provided with an anchor point connected to the tensioner (133).

5. The device for measuring deformation of the bottom plate of the containment vessel of a nuclear power plant according to claim 3, characterized in that: The exhaust water adding device (3) comprises a water replenishing bucket (31), a water filling pump (32), a water filling tee (33), and a water return tee (34); one end of the water filling tee (33) is connected to the water filling bucket (31) through the water filling pump (32); the other two ends of the water filling tee (33) are respectively connected to the first liquid storage bucket (812) of the first deformation measuring device (81), the second liquid storage bucket of the second deformation measuring device (82), the third liquid storage bucket of the third deformation measuring device (83), and the liquid storage bucket of the reference measuring device (2); one end of the water return tee (34) is connected to the water replenishing bucket (31), and the other two ends of the water return tee (34) are respectively connected to the bottom of the first liquid storage bucket (812) of the first deformation measuring device (81), the bottom of the second liquid storage bucket of the second deformation measuring device (82), the third liquid storage bucket of the third deformation measuring device (83), and the bottom of the fourth liquid storage bucket of the reference measuring device (2).

6. A method for measuring the deformation of the bottom plate of a nuclear power plant containment vessel using the device for measuring the deformation of the bottom plate of a nuclear power plant containment vessel according to any one of claims 1 to 5, characterized in that: The following steps are involved: The first deformation measuring device (81), the second deformation measuring device (82), and the third deformation measuring device (83) respectively measure the corresponding initial liquid level measurement value B t0 , initial angle measurement value θ t0 , initial height measurement value h t0 , and the displacement value h between the bottom bracket (11) and the top bracket (12) 高传t0 , and collected by the collection device (4); The level instrument measures the elevation value H of the reference measuring device (2) and the second deformation measuring device (82). 基准t0 , H 底板参考t0 ; The processing device (5) obtains deformation measurement results of the Nth measurement point and the N-1th measurement point of the containment bottom plate (6) at time t1 as follows: D H（N、N-1）t1 =(B 点（N-1）t1 -B 点（N-1）t0 )-(B) 点Nt1 -B 点Nt0 ); And according to H 底板参考t1 =H 底板参考t0 +h 高传t1 -h 高传t0 +Δ H（顶板参考、基准装置）t1 , the elevation value of the Nth measuring point on the containment bottom plate (6) at time t1 is obtained as: H 点Nt1 =H 底板参考t1 +h 底板参考t1 cosθ 底板参考t1 +B 底板参考t1 -h 点Nt1 cosθ 点Nt1 -B 点Nt1 。 7. The measuring method of the device for measuring deformation of the bottom plate of the containment vessel of a nuclear power plant according to claim 6, characterized in that: The exhaust water adding device (3) stops after filling the first deformation measuring device (81) and the second deformation measuring device (82) with water until the water reaches 0.5Ha, where Ha is the full scale value measured by the liquid storage tank.

8. The measuring method of the device for measuring deformation of the bottom plate of the containment vessel of a nuclear power plant according to claim 7, characterized in that: The first deformation measuring device (81), the second deformation measuring device (82), and the third deformation measuring device (83) respectively collect angle information through the first angle sensor (815), the second angle sensor, and the third angle sensor. If the angle information does not meet the requirements, the collecting device (4) generates an alarm. According to the alarm information, the first leveling device (813), the second leveling device, and the third leveling device are respectively used to perform leveling operations. After leveling, the collecting device (4) performs another detection.

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