Nuclear power plant bolt pretightening force aging detection device

Abstract

The utility model discloses a bolt pretightening force aging detection device for a nuclear power plant, which is used for mounting a tensioner body and comprises a support frame, a folding assembly, a tensioner positioning seat, a tensioner rotating seat, a fastener and a driving assembly. According to the bolt pre-tightening force aging detection device for the nuclear power plant, through the arrangement of the folding assembly and the driving assembly, adjustment of different heights of the tensioner body is realized, so that the mounting requirements of the tensioner body during detection at different height positions are met. And the tensioner rotating seat can drive the fastener to rotate through self rotation, so that the tensioner body and the tested base body can be assembled and disassembled. According to the bolt pretightening force aging detection device for the nuclear power plant, a tensioner installation technology is combined with an on-site actual detection problem, the installation efficiency of a large bolt tensioner is improved, semi-automation of large bolt pretightening force detection is achieved, the situation that a large amount of manpower is consumed when the tensioner is manually installed is avoided, and the pretightening force detection efficiency and the detection accuracy of a stretching method are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to nuclear power plant aging detection technical field especially relates to a nuclear power plant bolt pretightening force aging detection device. BACKGROUND

[0002] Nuclear power plant bolts are numerous, and individual bolts are large, which are mainly used to ensure that power plant equipment and fixing devices can be safely and stably operated under various working conditions, especially in extreme accident conditions. In recent years, there have been feedbacks of bolt fracture and failure in domestic nuclear power plants, which poses a potential threat to the safe operation of nuclear power plants. By carrying out bolt integrity aging detection and evaluation, the structural integrity of the bolt is ensured, the aging degradation degree of the bolt is minimized, and the nuclear power plant equipment has a good operating state.

[0003] At present, the pretightening force of large anchor bolts in nuclear power plants is detected by tension method, which requires the installation of large tensioners, consumes a lot of manpower and time, and has a large industrial safety risk. Due to the different sizes and installation positions of large anchor bolts in power plants, the tensioner needs to be installed multiple times during the pretightening force detection process. Therefore, in the aspect of large pretightening force detection in nuclear power plants, a pretightening force aging detection device needs to be developed, which is designed with lightweight materials to save manpower for carrying the device, researches on driving methods, designs and researches on tensioner lifting devices, designs of nut and bolt alignment, and designs to meet the requirements of bolt detection at different installation heights, so as to reduce the installation workload of bolt tensioners, reduce the risk of on-site operation of personnel, and improve the efficiency of large bolt pretightening force detection.

[0004] The bolt tensioning industry at home and abroad has carried out a lot of work on large bolt pretightening force detection for a long time. For example, a nuclear power plant developed a pretightening force detection method to solve the problem of pretightening force loss of anchor bolts of steam pipeline restrictions. Most of the inspection methods are tension methods. From the implementation effect, most bolt tensioning relies on manual installation of tensioners, which cannot fundamentally reduce the workload of bolt pretightening force detection. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is to provide a nuclear power plant bolt pretightening force aging detection device.

[0006] The utility model adopts the technical scheme to solve the technical problem: a nuclear power plant bolt pretightening force aging detection device is constructed for installing a tensioner body, which comprises a support frame, a folding assembly, a tensioner positioning seat, a tensioner rotating seat, a fastener, and a driving assembly.

[0007] The folding assembly is connected with the support frame and can move along the height direction of the support frame.

[0008] The stretcher positioning seat is arranged on the folding assembly, the stretcher body is arranged on the stretcher positioning seat, the stretcher rotating seat is arranged on the folding assembly and abuts against the stretcher positioning seat, the stretcher rotating seat can rotate relative to the stretcher positioning seat, and the fastener is used for connecting the stretcher body and the measured base body.

[0009] The stretcher rotating seat can drive the fastener to rotate through self-rotation, so as to realize the fixing or dismounting of the stretcher body and the measured base body.

[0010] The driving assembly is connected with the support frame and is used for driving the folding assembly to move along the height direction of the support frame.

[0011] In some embodiments, the folding assembly comprises a folding connecting piece and a folding support piece hinged with the folding connecting piece.

[0012] The folding connecting piece is movably connected with the support frame.

[0013] The stretcher positioning seat is arranged on the folding support piece.

[0014] In some embodiments, the folding assembly further comprises a folding clamping piece used for connecting the folding connecting piece and the folding support piece.

[0015] In some embodiments, the driving assembly comprises a winch body connected with the support frame, a rocker arm connected with the winch body, a handle connected with the rocker arm, and a driving connecting piece connected with the winch body.

[0016] In some embodiments, one end of the driving connecting piece away from the winch body is connected with the folding connecting piece.

[0017] In some embodiments, the driving connecting piece is a steel wire rope.

[0018] In some embodiments, the nuclear power plant bolt pre-tightening force aging detection device further comprises a fixing assembly, and the fixing assembly comprises a support leg connected with the support frame.

[0019] In some embodiments, the support leg is connected with the support frame through a retaining member.

[0020] In some embodiments, the fixing assembly further comprises an adjusting foot pad connected with the support leg.

[0021] In some embodiments, the nuclear power plant bolt pre-tightening force aging detection device further comprises a steering wheel connected with the support frame, and the steering wheel is provided with a brake device.

[0022] The present invention offers the following advantages: The nuclear power plant bolt preload aging testing device, through the arrangement of folding and driving components, allows for adjustment of the tensioner body at different heights to meet installation requirements when testing at various heights. The tensioner rotating seat can rotate itself to drive the fasteners, enabling the installation and disassembly of the tensioner body and the tested substrate. This nuclear power plant bolt preload aging testing device combines tensioner installation technology with addressing practical on-site testing challenges, improving the installation efficiency of large bolt tensioners, achieving semi-automation of large bolt preload testing, avoiding the significant labor costs associated with manual installation, effectively mitigating industrial safety risks associated with manual installation, and improving the efficiency and accuracy of the tensile preload testing method. Attached Figure Description

[0023] To more clearly illustrate the technical solution of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:

[0024] Fig. 1 This is a schematic diagram of the structure of the nuclear power plant bolt preload aging detection device in some embodiments of the present invention when it is not in use;

[0025] Fig. 2 This is a schematic diagram of the structure of the nuclear power plant bolt preload aging detection device in the initial stage of use in some embodiments of this utility model;

[0026] Fig. 3 This is a schematic diagram of the structure of the nuclear power plant bolt preload aging detection device in use when it is lifted in some embodiments of this utility model. Detailed Implementation

[0027] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0028] It should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing", "setting" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. When an element is referred to as "on" or "below" another element, the element can be "directly" or "indirectly" above another element, or one or more intervening elements can exist. The terms "first", "second", "third" and the like are only for the convenience of describing the technical solutions, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features with "first", "second", "third" and the like can be explicitly or implicitly included one or more of the features. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] Please refer to Figs. 1 to 3 It is a nuclear power plant bolt pre-tightening force aging detection device in some embodiments of the present application, which is used for installing the stretcher body 9, and comprises a support frame 1, a folding assembly 2, a stretcher positioning seat 3, a stretcher rotating seat 4, a fastener and a driving assembly 5. The folding assembly 2 is connected with the support frame 1 and can move along the height direction of the support frame 1; the stretcher positioning seat 3 is arranged on the folding assembly 2, the stretcher body 9 is arranged on the stretcher positioning seat 3, the stretcher rotating seat 4 is arranged on the folding assembly 2 and abuts against the stretcher positioning seat 3, the stretcher rotating seat 4 can rotate relative to the stretcher positioning seat 3, and the fastener is used to connect the stretcher body 9 and the measured base body 8; the stretcher rotating seat 4 rotates to drive the fastener to rotate, so as to realize the fixing or dismounting of the stretcher body 9 and the measured base body 8; the driving assembly 5 is connected with the support frame 1 and is used to drive the folding assembly 2 to move along the height direction of the support frame 1.

[0030] Specifically, the folding assembly 2 is in a folded state relative to the support frame 1 when not in use, and can be in an unfolded state relative to the support frame 1 when the folding assembly 2 is in use, and the folding assembly 2 is specifically used for supporting the stretcher positioning seat 3. The fastener can be a mounting bolt, and the measured base body 8 is a mounting position of the bolt to be detected. The lower part of the stretcher rotating seat 4 is connected to the center of the stretcher folding assembly 2, and the upper part of the stretcher rotating seat 4 is positioned on the stretcher positioning seat 3, and the stretcher positioning seat 3 provides a guiding positioning function for the rotating movement of the stretcher rotating seat 4, so that the stretcher rotating seat 4 can rotate around its own axis. When the stretcher rotating seat 4 rotates clockwise, the fastener is driven to fasten the stretcher body 9 and the measured base body 8, and the mounting of the stretcher body 9 and the measured base body 8 is completed, and at this time the stretcher body 9 can be operated to detect the bolt to be detected. When the stretcher rotating seat 4 rotates counterclockwise, the fastener is driven to disassemble the stretcher body 9 and the measured base body 8, and finally the stretcher body 9 and the measured base body 8 are disassembled. The stretcher rotating seat 4 is provided with a slot corresponding to the fastener, so that the stretcher can rotate the fastener.

[0031] Understandably, the nuclear power plant bolt pre-tightening force aging detection device realizes the adjustment of the stretcher body 9 at different heights through the setting of the folding assembly 2 and the driving assembly 5, so as to meet the mounting requirements of the stretcher body 9 when detecting at different height positions. The stretcher rotating seat 4 can drive the fastener to rotate through its own rotation, so as to realize the mounting and dismounting of the stretcher body 9 and the measured base body 8. The nuclear power plant bolt pre-tightening force aging detection device combines the stretcher mounting technology with the actual detection problem on site, improves the mounting efficiency of the large bolt stretcher, realizes the semi-automation of the large bolt pre-tightening force detection, avoids the consumption of a large amount of manpower for manual stretcher installation, effectively avoids the industrial safety risk caused by manual operation of installing the stretcher, and improves the pre-tightening force detection efficiency and the detection accuracy of the stretcher.

[0032] In some embodiments, the folding assembly 2 includes a folding connecting piece 21 and a folding supporting piece 22 hinged to the folding connecting piece 21, the folding connecting piece 21 is movably connected to the support frame 1, and the stretcher positioning seat 3 is arranged on the folding supporting piece 22. The folding assembly 2 further includes a folding clamping piece 23 for connecting the folding connecting piece 21 and the folding supporting piece 22. As shown in Fig. 1 , when the nuclear power plant bolt pre-tightening force aging detection device is in a non-use state, the folding connecting piece 21 and the folding supporting piece 22 are in a parallel state, and the folding connecting piece 21 is connected to the support frame 1 to facilitate storage. As shown in Fig. 2 and Fig. 3When the nuclear power plant bolt pre-tightening force aging detection device is to be used, the folding support 22 can be rotated, at which time the folding support 22 and the folding connecting piece 21 are in a vertical state, and then the relative positions of the folding connecting piece 21 and the folding support 22 are fixed by the folding clamping piece 23. In general, the nuclear power plant bolt pre-tightening force aging detection device can realize the storage function. After the installation of the stretcher body 9 is completed, the folding assembly 2, the stretcher positioning seat 3, and the stretcher rotating seat 4 can be lowered to the lowest position as a whole, and then disassembled and folded for storage.

[0033] The driving assembly 5 includes a winch body 51 connected with the support frame 1, a rocker arm 52 connected with the winch body 51, a handle 53 connected with the rocker arm 52, and a driving connecting piece connected with the winch body 51. The end of the driving connecting piece away from the winch body 51 is connected with the folding connecting piece 21. Understandably, the driving connecting piece is a steel wire rope, and the other end of the driving connecting piece is wound on the folding connecting piece 21. The winch body 51 can be a hand winch, and the handle 53 can be operated manually to drive the rocker arm 52 and the winch body 51 to rotate, realizing the function of lifting the folding assembly 2 along the height direction of the support frame 1 as a whole.

[0034] Further, the nuclear power plant bolt pre-tightening force aging detection device further comprises a fixing assembly 6, which comprises a leg piece 61 connected with the support frame 1. The leg piece 61 is connected with the support frame 1 through a retaining piece, which can be a locking rose screw. The relative positions between the leg piece 61 and the support frame 1 are adjustable, which can realize installation in different space positions, thereby ensuring the stability of the stretcher body 9 to be installed and effectively improving the installation quality of the stretcher body 9, and finally realizing the quick installation of the stretcher body 9 in place. The fixing assembly 6 further comprises an adjusting foot pad 62 connected with the leg piece 61, which can ensure the installation stability of the leg piece 61.

[0035] The nuclear power plant bolt pre-tightening force aging detection device further comprises a steering wheel 7 connected with the support frame 1, and the steering wheel 7 is provided with a brake device. The steering wheel 7 is mainly used for adjusting the position of the stretcher body 9 in the horizontal direction, and the brake device is used for fixing the steering wheel 7 to prevent the nuclear power plant bolt pre-tightening force aging detection device from shaking during work, and finally realizing the stable installation of the nuclear power plant bolt pre-tightening force aging detection device.

[0036] The use steps of the nuclear power plant bolt pre-tightening force aging detection device are as follows:

[0037] 1. Take all the components of the nuclear power plant bolt pre-tightening force aging detection device from the storage box;

[0038] 2. Insert the leg piece 61 into the square tube hole reserved in the support frame 1, and use the retaining piece to lock the relative positions between the leg piece 61 and the support piece. The leveling can be adjusted by the adjusting foot pad 62;

[0039] 3. After the nuclear power plant bolt pre-tightening force aging detection device is placed in the working position, the brake device is used to lock the position of the steering wheel 7;

[0040] 4. The folded support 22 is unfolded, the stretcher positioning seat 3 is arranged on the folded support 22, and the stretcher rotating seat 4 is arranged on the stretcher positioning seat 3;

[0041] 5. The stretcher body 9 is arranged on the stretcher positioning seat 3;

[0042] 6. The winch body 51 is shaken to lift the stretcher body 9, when the stretcher body 9 is lifted to a proper position, the stretcher rotating seat 4 is rotated to drive the fastener to fasten the stretcher body 9 and the measured base body 8, and the stretcher body 9 is installed in place;

[0043] 7. After the stretcher body 9 is installed in place, the stretcher rotating seat 4, the stretcher positioning seat 3 and the folding assembly 2 are lowered to a position, and then the stretcher body 9 can be operated;

[0044] 8. When the stretcher body 9 is used, the winch body 51 is shaken to lift the stretcher rotating seat 4, the stretcher positioning seat 3 and the folding assembly 2 to a proper height position;

[0045] 9. The stretcher rotating seat 4 is rotated to drive the fastener to disassemble the stretcher body 9 and the measured base body 8, after the stretcher body 9 and the measured base body 8 are completely separated, the stretcher rotating seat 4, the stretcher positioning seat 3 and the folding assembly 2 are lowered to a position, and then the stretcher body 9, the stretcher rotating seat 4 and the stretcher positioning seat 3 are successively disassembled;

[0046] 10. After the disassembly is completed, the folding clamping part 23 is pressed down, the folded support 22 is folded down and stored, then the fixing part is loosened, the supporting leg part 61 is pulled out, and finally the storage is completed.

[0047] It can be understood that the above embodiment only expresses the preferred embodiment of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent scope; it should be pointed out that the above technical features can be freely combined without departing from the concept of the utility model, and some deformations and improvements can be made, which belong to the protection scope of the utility model; therefore, all equivalent transformations and modifications within the scope of the utility model claim should belong to the scope of the utility model claim.

Claims

1. A device for testing the preload aging of bolts in nuclear power plants, used for installing a tensioner body (9), characterized in that, It includes a support frame (1), a folding assembly (2), a tensioner positioning seat (3), a tensioner rotating seat (4), fasteners, and a drive assembly (5); The folding assembly (2) is connected to the support frame (1) and can move along the height direction of the support frame (1); The tensioner positioning seat (3) is disposed on the folding assembly (2), the tensioner body (9) is disposed on the tensioner positioning seat (3), the tensioner rotating seat (4) is disposed on the folding assembly (2) and abuts against the tensioner positioning seat (3), the tensioner rotating seat (4) can rotate relative to the tensioner positioning seat (3), and the fastener is used to connect the tensioner body (9) and the substrate (8) to be tested. The tensioner rotating seat (4) can drive the fastener to rotate by its own rotation, thereby fixing or disassembling the tensioner body (9) and the substrate (8) being tested; The drive assembly (5) is connected to the support frame (1) and is used to drive the folding assembly (2) to move along the height direction of the support frame (1).

2. The nuclear power plant bolt preload aging testing device according to claim 1, characterized in that, The folding assembly (2) includes a folding connector (21) and a folding support (22) hinged to the folding connector (21); The folding connector (21) is movably connected to the support frame (1); The tensioner positioning seat (3) is disposed on the folding support (22).

3. The nuclear power plant bolt preload aging testing device according to claim 2, characterized in that, The folding assembly (2) further includes a folding locking member (23) for connecting the folding connector (21) and the folding support member (22).

4. The nuclear power plant bolt preload aging testing device according to claim 2, characterized in that, The drive assembly (5) includes a winch body (51) connected to the support frame (1), a rocker arm (52) connected to the winch body (51), a handle (53) connected to the rocker arm (52), and a drive connector connected to the winch body (51).

5. The nuclear power plant bolt preload aging testing device according to claim 4, characterized in that, The end of the drive connector away from the winch body (51) is connected to the folding connector (21).

6. The nuclear power plant bolt preload aging testing device according to claim 4, characterized in that, The drive connector is a steel wire rope.

7. The nuclear power plant bolt preload aging testing device according to claim 1, characterized in that, The nuclear power plant bolt preload aging test device also includes a fixing component (6), which includes a support leg (61) connected to the support frame (1).

8. The nuclear power plant bolt preload aging testing device according to claim 7, characterized in that, The outrigger (61) is connected to the support frame (1) via a retaining member.

9. The nuclear power plant bolt preload aging testing device according to claim 7, characterized in that, The fixing component (6) also includes an adjusting foot pad (62) connected to the support leg (61).

10. The nuclear power plant bolt preload aging testing device according to claim 1, characterized in that, The nuclear power plant bolt preload aging test device also includes a steering wheel (7) connected to the support frame (1), and the steering wheel (7) is equipped with a brake device.

Images