Nuclear power unit dynamic pipe clamp test tool, test device and test method

Abstract

The application provides a nuclear power unit dynamic pipe clamp test tool, test device and test method. The tool comprises a connecting structure and a pipe simulation body. The pipe simulation body is connected with a pipe clamp and a vertical force applying device. The connecting structure comprises a connecting plate, a connecting disc, a connecting pin and two baffle plates. The connecting plate is adjustably installed on a test table. The two baffle plates are parallel and vertically fixed on the connecting plate. The connecting pin is fixed between the two baffle plates. The connecting disc is provided with first and second pin holes. The connecting pin is arranged in the first pin hole. The connecting disc can be deflected from the vertical state to the center line of the first and second pin holes at a set angle with the force applying direction of the force applying device. The connecting structure installed at different positions of the test table can be fixed with the dynamic pipe clamp through the second pin hole and the fixing pin of the dynamic pipe clamp. The application can simulate the stress condition of the dynamic pipe clamp in normal operation or when the pipe shakes and deflects and swings.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nuclear power engineering pipeline system test, in particular to a nuclear power unit pipeline support and hanger test tool, test device and test method. BACKGROUND

[0002] The pipeline support and hanger is an important part of the nuclear power engineering pipeline system. Whether the pipeline support and hanger arrangement is reasonable, the structure selection is appropriate, and the quality is reliable directly affects the stress state of the pipeline under different working conditions, and further affects the safe operation and service life of the nuclear power plant. At the same time, due to the huge number of pipeline support and hangers used, it has an important influence on the construction progress and cost.

[0003] The domestic in-service and proposed VVER unit nuclear island plant process system pipeline and its supporting design are completed by the Russian design institute. Based on the continuous improvement of the domestic nuclear power unit equipment and manufacturing level, the local manufacturing and supply proportion of VVER unit equipment is increased, which can effectively reduce the construction cost of the unit. During the construction period of the in-service unit, the pipeline and its accessories of the nuclear grade process system and the non-nuclear grade process system with a large amount of use in the Russian design range are converted and designed by domestic manufacturers. However, the price of the pipeline support and hanger of the nuclear power unit is much higher than that of the domestic same capacity pressurized water reactor nuclear power unit pipeline support and hanger. Moreover, due to the product delivery period lag caused by non-local production, it finally causes great adverse effects on the progress of the project. Therefore, after the support and hanger are localized, the supply and installation cycle can be effectively shortened, and the cost reduction and efficiency improvement of the power plant can be realized.

[0004] Through the localization research and development of the VVER nuclear power unit support and hanger, after completing the localization structure design of the VVER unit pipeline support and hanger, the corresponding mechanical test is needed to verify the rationality of the support and hanger structure design and the manufacturing quality, so as to provide test data for the localization and formal production of the nuclear power unit pipeline support and hanger. The localized nuclear power unit support and hanger meeting the test requirements can effectively shorten the supply and installation cycle, thereby effectively reducing the supply and installation cost during the construction period of the unit. However, there is no specific test tool and test method for the nuclear power unit pipeline support and hanger in the ASME Volume III NF Subvolume specification requirements.

[0005] The structure of the nuclear power unit pipeline support and hanger is shown in Figure 1 The structure of the nuclear power unit pipeline support and hanger is shown in

[0006] A nuclear grade pipeline standard support and hanger test tool and test method are disclosed in Chinese patent CN106448758B. The tool components are adjustably installed on the test main rack, the support pipe clamp is fixed on the tool components, the pipeline simulation body passes through the support pipe clamp, and the actuator is used to apply a vertical force to the pipeline simulation body through the rigid connecting block to perform load experiments in different directions on the support pipe clamp. Although the tool and method can complete the load experiments in different directions on the support pipe clamp, they can only simulate the stress conditions of rigid support components such as sliding, guiding and limiting during operation, and the experimental objects are suitable for support components lifted from bottom to top, and cannot simulate the deflection and swing of dynamic pipe clamps such as spring hangers, damper hangers and rigid pull rods due to pipeline shaking during operation. SUMMARY

[0007] The technical problem to be solved by the present application is to provide a nuclear power unit pipeline support and hanger test tool, test device and test method, which can simulate the stress conditions of dynamic pipe clamps during normal operation or when deflection and swing occur due to pipeline shaking during operation.

[0008] The technical solution adopted to solve the technical problem of the present application is:

[0009] The present application provides a nuclear power unit dynamic pipe clamp test tool, comprising: a connecting structure and a pipeline simulation body,

[0010] The pipeline simulation body is used to be connected with the pipe clamp of the dynamic pipe clamp, is horizontally arranged and is connected with the force applying device, and the force applying device is used to apply a vertical force to the pipeline simulation body,

[0011] The connecting structure comprises a connecting plate, a connecting disc, a connecting pin and two baffles, the connecting plate is adjustably installed on the test table, the two baffles are arranged in parallel and are vertically fixed on the connecting plate, the connecting pin is fixed between the two baffles, and the first pin hole and the second pin hole are formed in the connecting disc,

[0012] The connecting disc can be deflected from the vertical state to the center line of the first pin hole and the second pin hole, and the deflection angle between the center line and the force applying direction of the force applying device is a set angle, so that the connecting structure installed at different positions of the test table can be fixed with the dynamic pipe clamp clamped on the pipeline simulation body through the second pin hole of the connecting disc and the fixed pin of the dynamic pipe clamp.

[0013] Optionally, the connecting disc can be deflected along the axial direction of the connecting pin and / or the horizontal plane perpendicular to the axial direction of the connecting pin, to the center line of the first pin hole and the second pin hole, and the deflection angle between the center line and the force applying direction of the force applying device is a set angle.

[0014] Optionally, the two baffles have a space for the connecting plate to deflect in the axial direction of the connecting pin.

[0015] Optionally, the first pin hole is arranged non-concentrically with the connecting plate to enable the connecting plate to deflect in the horizontal plane perpendicular to the axial direction of the connecting pin.

[0016] Optionally, the first pin hole has a hole diameter larger than the diameter of the connecting pin, and the second pin hole has a hole diameter larger than the diameter of the fixing pin of the dynamic pipe clamp.

[0017] Optionally, the set angle is 0-6°.

[0018] Optionally, a plurality of bolt holes are formed in the test bench and the connecting plate, and the connecting plate is installed at different positions of the test bench by sequentially passing bolts through the bolt holes at different positions of the test bench and the connecting plate and locking the bolts with nuts.

[0019] Optionally, the pipe simulation body is connected to the force applying device through two connecting arms, the upper ends of the two connecting arms are connected to the force applying device, and the lower ends of the two connecting arms are detachably connected to the two ends in the axial direction of the pipe simulation body.

[0020] The application further provides a dynamic pipe clamp test device for a nuclear power unit, which comprises a test bench, a force applying device, a strain sensor, and the dynamic pipe clamp test tooling described above,

[0021] The connecting structure of the dynamic pipe clamp test tooling for a nuclear power unit is adjustably installed on the test bench; the force applying device is connected to the pipe simulation body of the dynamic pipe clamp test tooling for a nuclear power unit and is used to apply a force in the vertical direction to the pipe simulation body; and the strain sensor is used to be fixed at the dangerous section of the dynamic pipe clamp.

[0022] The application further provides a method for performing a mechanical test on a dynamic pipe clamp for a nuclear power unit by using the test device described above, which comprises the following steps:

[0023] According to the load direction of the dynamic pipe clamp to be tested, the set angle and the position of the connecting structure installed on the test bench are determined, the connecting structure is installed on the test bench through the connecting plate,

[0024] The pipe simulation body is connected to the force applying device, and the dynamic pipe clamp to be tested is clamped on the pipe simulation body, and the strain sensor is fixed at the dangerous section of the dynamic pipe clamp,

[0025] According to the set angle, the position of the connecting plate is determined, the force applying device is lifted to the second pin hole of the connecting plate to extend into the two mounting arms of the dynamic pipe clamp, and the connecting plate and the dynamic pipe clamp are fixed and connected through the fixing pin of the dynamic pipe clamp.

[0026] The force applying device is started to apply force to the pipeline simulation body in the vertical direction to form a displacement-load curve.

[0027] In the present application, by adjusting the position of the connecting plate and the deflection angle of the connecting disc, the function of applying different direction loads to the pipeline support hanger can be realized. When vertical load needs to be applied, the center line connecting the first pin hole and the second pin hole of the connecting disc can be adjusted to be in the same straight line with the force applying direction of the force applying device. When the tension machine pulls the simulation pipeline, the load can be vertically transmitted to the test piece; when other direction loads need to be applied, the position of the connecting plate and the deflection angle of the connecting disc can be adjusted according to the required load direction, so that the center line connecting the first pin hole and the second pin hole is at a set angle with the force applying direction of the force applying device. At this time, after the tension machine pulls the simulation pipeline, the load will be transmitted to the test piece along the set angle direction, so that the test piece generates a bending moment, so as to simulate the stress condition of the dynamic pipe clamp such as spring hanger, damper hanger, rigid pull rod, etc. under normal operation or when the pipe shakes and deflects and swings. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a dynamic pipe clamp of a nuclear power unit;

[0029] Figure 2 It is a structural schematic diagram of a dynamic pipe clamp test tool provided by embodiment 1 of the present application for a nuclear power unit;

[0030] Figure 3 It is an application structural schematic diagram of a dynamic pipe clamp test tool provided by embodiment 1 of the present application for a nuclear power unit;

[0031] Figure 4 It is a schematic diagram of the deflection of the connecting disc to a set angle along the axial direction of the connecting pin;

[0032] Figure 5 It is Figure 4 the actual state of the on-site pipeline installation corresponding to the simulation scenario of

[0033] Figure 6 It is a schematic diagram of the deflection of the connecting disc to a set angle along the axial direction of the connecting pin;

[0034] Figure 7 It is Figure 6 the actual state of the on-site pipeline installation corresponding to the simulation scenario of

[0035] Figure 8 It is a structural schematic diagram of a pipeline simulation body;

[0036] Figure 9 It is a dynamic pipe clamp key size position and displacement measurement point arrangement diagram; wherein, (a) is a dynamic pipe clamp key size position diagram, and (b) is a displacement measurement point arrangement diagram. DETAILED DESCRIPTION

[0037] The technical solutions in the application will be described clearly and completely below in combination with the drawings in the application. Obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the application.

[0038] In the description of the application, it should be noted that the indication of the orientation or position relationship such as "upper" is based on the orientation or position relationship shown in the drawings, and is only for the convenience and simplification of the description, and does not indicate or imply that the indicated device or element must be provided with a specific orientation, constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the application.

[0039] In the description of the application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0040] In the description of the application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection", "arrangement", "installation", "fixation" and the like should be understood broadly, for example, can be fixedly connected or can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the application can be understood according to the specific circumstances.

[0041] The application provides a nuclear power unit dynamic pipe clamp test tool, comprising a connecting structure and a pipe simulation body,

[0042] The pipe simulation body is used for clamping with the pipe clamp of the dynamic pipe clamp, is horizontally arranged and is connected with a force applying device, and the force applying device is used for applying a force in the vertical direction to the pipe simulation body,

[0043] The connecting structure comprises a connecting plate, a connecting disc, a connecting pin and two baffles, the connecting plate is adjustably installed on a test table, the two baffles are arranged in parallel and are both vertically fixed to the connecting plate, the connecting pin is fixed between the two baffles, and the connecting disc is provided with a first pin hole and a second pin hole, and the connecting disc is arranged on the connecting pin through the first pin hole,

[0044] The connecting disc can be deflected from the vertical state to the center connecting line of the first pin hole and the second pin hole, and the deflection angle between the deflection direction of the connecting disc and the force applying direction of the force applying device is a set angle, so that the connecting structure installed at different positions of the test table can be fixedly connected with the dynamic pipe clamp clamped on the pipe simulation body through the second pin hole of the connecting disc and the fixing pin of the dynamic pipe clamp.

[0045] The application further provides a nuclear power unit dynamic pipe clamp test device, which comprises a test table, a force applying device, a strain sensor and the nuclear power unit dynamic pipe clamp test tool,

[0046] The connecting structure of the nuclear power unit dynamic pipe clamp test tool is adjustably installed on the test table; the force applying device is connected with the pipe simulation body of the nuclear power unit dynamic pipe clamp test tool and is used for applying a force in the vertical direction to the pipe simulation body; and the strain sensor is used for being fixed at a dangerous section of the dynamic pipe clamp.

[0047] The application further provides a method for performing a mechanical test on a nuclear power unit dynamic pipe clamp by using the test device, which comprises the following steps:

[0048] According to the load direction of the dynamic pipe clamp to be tested, the set angle and the position of the connecting structure installed on the test table are determined, the connecting structure is installed on the test table through the connecting plate,

[0049] The pipe simulation body is connected with the force applying device, the dynamic pipe clamp to be tested is clamped on the pipe simulation body, and the strain sensor is fixed at the dangerous section of the dynamic pipe clamp,

[0050] According to the set angle, the position of the connecting disc is determined, the force applying device is lifted to the second pin hole of the connecting disc to extend into the two mounting arms of the dynamic pipe clamp, and the connecting disc and the dynamic pipe clamp are fixed and connected through the fixing pin of the dynamic pipe clamp.

[0051] The force applying device is started to apply a force in the vertical direction to the pipe simulation body to form a displacement-load relationship curve. Embodiment

[0052] As shown in Figure 2 and Figure 3 The embodiment provides a nuclear power unit dynamic pipe clamp test tool, which comprises a connecting structure and a pipe simulation body 6,

[0053] The pipe simulation body 6 is used for being clamped with the pipe clamp of the dynamic pipe clamp, is horizontally arranged and is connected with the force applying device, and the force applying device is used for applying a force in the vertical direction to the pipe simulation body 6,

[0054] The connecting structure comprises a connecting plate 7, a connecting disc 8, a connecting pin 9 and two baffle plates 10, the connecting plate 7 is adjustably installed on the test table, the two baffle plates 10 are arranged in parallel and are vertically fixed on the connecting plate 7, the connecting pin 9 is fixed between the two baffle plates 10, the connecting disc 8 is provided with a first pin hole 81 and a second pin hole 82, the first pin hole 81 is arranged on the connecting pin 9,

[0055] The connecting plate 8 can be deflected from the vertical state to the center line of the first pin hole 81 and the second pin hole 82, and the deflection angle is set to be a certain angle with the force direction of the force applying device, so that the connecting structure installed at different positions of the test bench can be fixed to the dynamic pipe clamp clamped on the pipe simulation body 6 through the second pin hole 82 of the connecting plate 8 and the fixing pin of the dynamic pipe clamp.

[0056] By adjusting the position of the connecting plate 7 and the deflection angle of the connecting plate 8, the function of applying load in different directions of the pipe support and hanger can be realized. When vertical load needs to be applied, the center line of the first pin hole 81 and the second pin hole 82 of the connecting plate 8 can be adjusted to be in the same straight line with the force direction of the force applying device, and when the tension machine pulls the simulation pipe, the load can be vertically transmitted to the test piece. When other direction load needs to be applied, the position of the connecting plate 7 and the deflection angle of the connecting plate 8 can be adjusted according to the required load direction, so that the center line of the first pin hole 81 and the second pin hole 82 is at a certain angle with the force direction of the force applying device. At this time, when the tension machine pulls the simulation pipe, the load will be transmitted to the test piece along the set angle direction, so that the test piece generates bending moment, so as to simulate the stress condition of the dynamic pipe clamp such as spring hanger, damper hanger, rigid pull rod and the like in normal operation or when the pipe shakes and swings due to the thermal displacement.

[0057] In the embodiment, the connecting plate 8 can be deflected in the axial direction of the connecting pin 9 and / or in the horizontal plane perpendicular to the axial direction of the connecting pin 9, and the center line of the first pin hole 81 and the second pin hole 82 is at a certain angle with the force direction of the force applying device.

[0058] As shown in Figure 3 , the direction of the applied load is at 90° with the horizontal direction, that is, the center line of the first pin hole 81 and the second pin hole 82 is in the same straight line with the force direction of the force applying device.

[0059] In the embodiment, the diameter of the first pin hole 81 is greater than the diameter of the connecting pin 9, and the diameter of the second pin hole 82 is greater than the diameter of the fixing pin of the dynamic pipe clamp.

[0060] In the embodiment, the two baffles 10 have a space for the connecting plate 8 to be deflected in the axial direction of the connecting pin 9.

[0061] Referring to Figure 4 , since the diameter of the first pin hole 81 is greater than the diameter of the connecting pin 9, and the diameter of the second pin hole 82 is greater than the diameter of the fixing pin of the dynamic pipe clamp, and the two baffles 10 have a space for the connecting plate 8 to be deflected in the axial direction of the connecting pin 9, the connecting plate 8 can be deflected in the axial direction of the connecting pin 9 to a certain angle and abut against one of the baffles, so as to simulate the stress condition of the dynamic pipe clamp 100 when it is deflected in the axial direction of the connecting pin 9 due to the shaking and thermal displacement of the pipe 200 during operation, as shown in Figure 5 .

[0062] By moving the position of the connecting disc 8 on the connecting pin 9, the connecting disc 8 can be deflected to abut against different positions of the baffle plate, so as to adjust the deflection angle of the connecting disc 8 in the axial direction of the connecting pin 9.

[0063] In this embodiment, the deflection angle of the connecting disc 8, i.e. the angle between the center line of the first pin hole 81 and the second pin hole 82 of the connecting disc 8 and the force applying direction of the force applying device.

[0064] In this embodiment, the first pin hole 81 is arranged non-concentrically with the connecting disc 8, so that the connecting disc 8 can be deflected in the horizontal plane perpendicular to the axial direction of the connecting pin 9 to a set angle.

[0065] Referring to Figure 6 Since the first pin hole 81 is arranged non-concentrically with the connecting disc 8, the connecting disc 8 can be deflected in the horizontal plane perpendicular to the axial direction of the connecting pin 9 to a set angle to simulate the stress condition of the dynamic pipe clamp 100 when it is deflected in the horizontal plane perpendicular to the axial direction of the connecting pin 9 due to the shaking and thermal displacement of the pipeline 200 during operation, as shown in Figure 7

[0066] In this embodiment, the set angle is 0°-6°.

[0067] In this embodiment, a plurality of bolt holes are formed in the test bench and the connecting plate 7, and the connecting plate 7 is installed at different positions of the test bench by passing the bolts through the bolt holes at different positions of the test bench and the connecting plate 7 in sequence and locking the bolts with nuts.

[0068] In this embodiment, the pipeline simulation body 6 is connected to the force applying device through two connecting arms 11, the upper ends of the two connecting arms 11 are connected to the force applying device, and the lower ends of the two connecting arms 11 are detachably connected to the two ends in the axial direction of the pipeline simulation body 6.

[0069] Specifically, as shown in Figure 8 The outer diameter D1 of the pipeline simulation body 6 should be the same as the allowable pipeline outer diameter of the dynamic pipe clamp to be tested, and the width L1 should be wider than the width of the pipe clamp of the dynamic pipe clamp to be tested.

[0070] The two ends in the axial direction of the pipeline simulation body 6 are provided with connecting portions which are detachably connected to the corresponding connecting arms.

[0071] In addition, a plurality of reinforcing rib plates are arranged between the connecting plate 7 and the baffle plate 10. Embodiment

[0072] The embodiment provides a dynamic pipe clamp test device for a nuclear power unit, which comprises a test bench, a force applying device, a strain sensor 12, and the dynamic pipe clamp test tooling of the embodiment 1,

[0073] ​The connecting structure of the dynamic pipe clamp test tool of the nuclear power unit is adjustably installed on the test bench; the force applying device is connected with the pipe simulation body 6 of the dynamic pipe clamp test tool of the nuclear power unit, and is used for applying force in the vertical direction to the pipe simulation body 6; and the strain sensor 12 is used for being fixed at the dangerous section of the dynamic pipe clamp.

[0074] The force applying device includes, but is not limited to, a servo motor, a servo oil press, a servo electro-hydraulic cylinder, a servo air cylinder and the like, and can clearly indicate the explicit value (including size and direction) of the force currently applied to the object and the displacement value (including size and direction), and can verify the above structure through related auxiliary sensors.

[0075] The test bench is the basis of the entire test device, and should be able to maintain the stability of the overall device structure under the maximum test force. Embodiment

[0076] The embodiment provides a method for performing mechanical test on a dynamic pipe clamp of a nuclear power unit by using the test device of embodiment 2, and the method comprises the following steps:

[0077] According to the load direction of the dynamic pipe clamp to be tested, the set angle and the position of the connecting structure installed on the test bench are determined, the connecting structure is installed on the test bench through the connecting plate 7,

[0078] The pipe simulation body 6 is connected with the force applying device, and the dynamic pipe clamp to be tested is clamped on the pipe simulation body 6, and the strain sensor 12 is fixed at the dangerous section of the dynamic pipe clamp,

[0079] According to the set angle, the position of the connecting disc 8 is determined, the force applying device is lifted to the second pin hole 82 of the connecting disc 8, the second pin hole 82 extends into the two mounting arms of the dynamic pipe clamp, and the connecting disc 8 and the dynamic pipe clamp are fixed and connected through the fixing pin of the dynamic pipe clamp;

[0080] The force applying device is started to apply force in the vertical direction to the pipe simulation body 6, so as to form a displacement-load relationship curve.

[0081] Before the test, the dangerous section of the pipe support hanger is confirmed through CAE software simulation and the like, and the strain sensor 12 is fixed at the dangerous section, as shown in FIG. 8, and 10 strain sensors are attached in the test. Figure 1

[0082] The specific process of the tensile test is as follows:

[0083] 1) 0~2 times nominal load test is performed on the pipe support hanger of the nuclear power unit: the pipe support hanger of the nuclear power unit is slowly loaded to 2 times the nominal load, and the load is maintained for at least 2 minutes.

[0084] ​2) Record the linear relationship between deformation and load of the nuclear power plant piping support hanger, and measure the maximum stress on the most dangerous section.

[0085] 3) Perform overall yield test on the nuclear power plant piping support hanger: slowly apply load to the test piece until the support hanger yields overall, i.e., the relationship curve between deformation (or displacement) and load is nonlinear, when the test piece passes the test at 0~2 times the nominal load.

[0086] 4) Continue to load until the support loses integrity or becomes unstable (if the load reaches 5 times the nominal load, and the support does not lose integrity or become unstable, then maintain the load for 1 minute, measure the maximum stress on the most dangerous section, visually observe the test piece for no obvious deformation, and then continue to load until the deformation increases and the load no longer increases).

[0087] 5) Detect the key dimensions of the nuclear power plant piping support hanger before and after the test, using a vernier caliper.

[0088] 6) Detect the stress at the specified position of the nuclear power plant piping support hanger, using a strain sensor, and use a dynamic and static strain acquisition system to collect data to obtain the load-strain curve.

[0089] 7) Detect the displacement at the specified position of the nuclear power plant piping support hanger. Use a dial indicator or digital micrometer to collect data to obtain the load-displacement curve.

[0090] Application Example:

[0091] Figure 1 The figure shows the schematic diagram of the DN250 dynamic pipe clamp of the nuclear power plant piping support hanger and the position of the related measuring points. The strain sensor 12 is fixed at the dangerous section of the dynamic pipe clamp, and is arranged on both sides. In this test, a total of 10 strain sensors are attached.

[0092] Figure 3 The figure shows the schematic diagram of the dynamic pipe clamp test loading: the test ground is connected to the ground anchor through the test tool to form a fixed base. The connecting base (which can be moved and positioned according to requirements) is arranged on the base and connected to the test piece. The connection form simulates the actual connection form. The test piece load is applied by the MTS electro-hydraulic servo structure test system actuator, and the test system actuator and the test piece are connected through a screw, tooling, disc, etc., to simulate the actual working state.

[0093] Figure 9The dynamic tube clamp key size position and displacement measuring point arrangement diagram is shown, wherein, (a) is a dynamic tube clamp key size position diagram, and (b) is a displacement measuring point arrangement diagram. The key sizes are detected before and after the test and recorded (each group of data is detected by different persons for three times, respectively recorded, and finally the average value is taken as the test data); the tube clamp displacement is the difference between displacement 1 and displacement 2 in the (b) diagram. The load-displacement curve is drawn during the test.

[0094] 2 times nominal load test, according to the test data, the load-deformation curve (P-△l) and the load-strain curve (P-ε) are drawn to judge the deformation characteristics within 0~2 times nominal load. The loading process is shown in Table 1.

[0095] Table 1 2 times nominal load test loading process table

[0096]

[0097] Overall yield test: the test piece qualified in 0~2 times nominal load test is slowly loaded again until the overall yield of the support hanger occurs, that is, the deformation (or displacement) and load relationship curve is nonlinear. And continue to load as much as possible until the support loses integrity, or instability (if the loading reaches 5 times the nominal load, without losing integrity or instability, the load is kept for 1 minute, the maximum stress on the most dangerous section is measured, and the sample is observed without obvious deformation, and then the loading is continued until the deformation increases and the load no longer increases). The strain of the support hanger is measured during the process → unloading → zero reading. The loading process is shown in Table 2.

[0098] Table 2 Overall yield test loading process table

[0099]

[0100] In summary, the present application provides a kind of VVER nuclear power unit pipeline support hanger test tool and mechanical test method, by applying different direction load to nuclear power unit pipeline support hanger, to dynamically simulate its actual working state, realize 0~2 times load-stress / load-displacement test and overall yield test. And respectively to the key size, key position strain and displacement of nuclear power unit pipeline support hanger shown in the figure before and after test are detected, to realize the rationality of support hanger structure design and manufacturing quality verification. The present application meets the requirements of "Russian VVER nuclear power unit pipeline support hanger localization project development" test technical agreement and "ASME BPVC-III (2015 edition)" volume III NF subvolume support specification, and provides a reasonable and feasible test verification scheme for nuclear power unit pipeline support hanger product localization and formal production.

[0101] It is understood that the above embodiments are only exemplary for illustrating the principles of the present application, and the present application is not limited thereto. Various modifications and improvements can be made by those skilled in the art without departing from the spirit and scope of the present application, and these modifications and improvements are also considered as the protection scope of the present application.

Claims

1. A dynamic tube sheet test tooling for a nuclear power plant unit, characterized by, The utility model relates to a test device for dynamic pipe clamp of nuclear power unit, which comprises a connecting structure and a pipe simulation body (6), the pipe simulation body (6) is used for clamping with the pipe clamp of dynamic pipe clamp, is horizontally arranged and is connected with the force applying equipment, the force applying equipment is used for applying the force in the vertical direction to the pipe simulation body (6), the connecting structure comprises a connecting plate (7), a connecting disc (8), a connecting pin (9) and two baffle plates (10), the connecting plate (7) is adjustably installed on the test bench, the two baffle plates (10) are arranged in parallel and are vertically fixed on the connecting plate (7), the connecting pin (9) is fixed between the two baffle plates (10), the connecting disc (8) is provided with a first pin hole (81) and a second pin hole (82), and the first pin hole (81) is arranged on the connecting pin (9) through the first pin hole (81), The connecting disc (8) can be deflected from the vertical state to the center line of the first pin hole (81) and the second pin hole (82) at a set angle with the force applying direction of the force applying equipment, so that the connecting structure installed at different positions of the test bench can be fixed with the dynamic pipe clamp clamped on the pipe simulation body (6) through the second pin hole (82) of the connecting disc (8) and the fixed pin of the dynamic pipe clamp. The connecting disc (8) can be deflected along the axial direction of the connecting pin (9) and / or the horizontal plane perpendicular to the axial direction of the connecting pin (9) to the center line of the first pin hole (81) and the second pin hole (82) at a set angle with the force applying direction of the force applying equipment. The first pin hole (81) and the connecting disc (8) are arranged non-concentrically, so that the connecting disc (8) can be deflected along the horizontal plane perpendicular to the axial direction of the connecting pin (9). The space between the two baffle plates (10) is used for the deflection of the connecting disc (8) along the axial direction of the connecting pin (9). The diameter of the first pin hole (81) is larger than the diameter of the connecting pin (9), and the diameter of the second pin hole (82) is larger than the diameter of the fixed pin of the dynamic pipe clamp. The set angle is 0-6 degrees.

2. The dynamic tube sheet test fixture for nuclear power plant components as set forth in claim 1, wherein, A plurality of bolt holes are formed on the test bench and the connecting plate (7), and the connecting plate (7) is installed at different positions of the test bench by locking nuts after the bolts pass through the bolt holes at different positions of the test bench and the connecting plate (7) in sequence.

3. The dynamic tube sheet test fixture for nuclear power plant components as set forth in claim 1, wherein, The pipe simulation body (6) is connected to the force applying equipment through two connecting arms (11), the upper ends of the two connecting arms (11) are connected to the force applying equipment, and the lower ends of the two connecting arms (11) are detachably connected to the two ends of the pipe simulation body (6) in the axial direction.

4. The dynamic tube sheet test fixture for nuclear power plant steam generators as defined in any one of claims 1-3, wherein, The utility model relates to a test device for dynamic pipe clamp of nuclear power unit, which comprises a test bench, a force applying equipment, a strain sensor (12), and the test device for dynamic pipe clamp of nuclear power unit as claimed in any one of claims 1-6, 5. The dynamic tube sheet test fixture for nuclear power plant steam generators as defined in any one of claims 1-3, wherein, The connecting structure of the test device for dynamic pipe clamp of nuclear power unit is adjustably installed on the test bench; the force applying equipment is connected to the pipe simulation body (6) of the test device for dynamic pipe clamp of nuclear power unit and is used for applying the force in the vertical direction to the pipe simulation body (6); and the strain sensor (12) is used for being fixed at the dangerous cross section of the dynamic pipe clamp.

6. The dynamic tube sheet test fixture for nuclear power plant steam generators as defined in any one of claims 1-3 wherein, 8. A method for performing mechanical test on the dynamic pipe clamp of nuclear power unit by using the test device as claimed in claim 7, which comprises the following steps:

7. A dynamic tube sheet testing apparatus for a nuclear power plant, comprising: ​ ​ ​ According to the load direction of the dynamic pipe clamp to be tested, the set angle and the position of the connecting structure mounted on the test bed are determined, the connecting structure is mounted on the test bed through the connecting plate (7), The pipe simulation body (6) is connected with the force applying device, and the dynamic pipe clamp to be tested is clamped on the pipe simulation body (6), and the strain sensor (12) is fixed at the dangerous section of the dynamic pipe clamp, According to the set angle, the position of the connecting disc (8) is determined, the lifting force applying device is lifted to the second pin hole (82) of the connecting disc (8) to extend into the two mounting arms of the dynamic pipe clamp, and the connecting disc (8) and the dynamic pipe clamp are fixed and connected through the fixing pin of the dynamic pipe clamp; The force applying device is started to make the force applying device apply force in the vertical direction to the pipe simulation body (6), and a displacement-load relationship curve is formed.

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