Anti-falling fixing device for nuclear power pressure vessel detection

Abstract

The application provides a nuclear power pressure container detection anti-falling fixing device, which comprises a workbench, a rotating disc capable of rotating in a circumferential direction, the rotating disc being used for bearing the pressure container, a supporting unit, two supporting vertical plates, the two supporting vertical plates being movably arranged on the workbench and being respectively located on opposite sides of the rotating unit, a driving unit, the driving unit being arranged on the workbench and being used for driving the supporting vertical plates to move relative to the workbench, and a clamping unit, two clamping units, the two clamping units being respectively arranged on the two supporting vertical plates and being capable of clamping or releasing the pressure container when the supporting vertical plates move relative to the workbench. The nuclear power pressure container detection anti-falling fixing device can fix the pressure container when the pressure container is detected, so that the problem that the pressure container shakes in the detection process is improved, the detection precision is improved, and the pressure container is prevented from being scratched.

Description

Technical Field

[0001] This application relates to auxiliary equipment for testing nuclear power pressure vessels, and more specifically, to an anti-detachment fixing device for testing nuclear power pressure vessels. Background Technology

[0002] Surface inspection of pressure vessels is an essential technology in the manufacturing of high-end equipment such as boilers and pressure vessels. Specifically, it refers to using non-destructive testing methods to inspect the surface and near-surface of pressure vessels for defects such as cracks, ensuring the safety performance and service life of the pressure vessels. In pressure vessel inspection operations, manual inspection of the overall structure of boiler pressure vessels using testing equipment is typically required to determine their integrity. However, during the inspection process, because pressure vessels are mostly cylindrical structures with relatively smooth surfaces, and must withstand various forces such as internal pressure fluctuations, temperature changes, and vibrations, using ordinary fixed supports can cause the pressure vessel to shake during inspection, compromising inspection accuracy and potentially damaging the pressure vessel itself. Summary of the Invention

[0003] This application provides at least one anti-detachment fixing device for testing nuclear power pressure vessels. It can fix the pressure vessel during testing to improve the problem of shaking during the testing process, which is beneficial to improving the testing accuracy and preventing the pressure vessel from being scratched.

[0004] This application provides an anti-detachment fixing device for nuclear power pressure vessel testing, comprising: a workbench with a turntable capable of circumferential rotation, the turntable being used to support the pressure vessel; a support unit including two support plates movably disposed on the workbench and respectively located on opposite sides of the rotation unit; a drive unit disposed on the workbench and used to drive the support plates to move relative to the workbench; and a clamping unit including two clamping units respectively disposed on the two support plates and capable of clamping or releasing the pressure vessel when the support plates move relative to the workbench.

[0005] In one optional embodiment, the drive unit includes a motor, a gear, and two racks; the motor is disposed on the worktable; the gear is sleeved on the drive shaft of the motor and can rotate circumferentially under the action of the motor; the two racks are respectively disposed on the two support plates and mesh with the gear respectively, and when the gear rotates circumferentially, the two racks respectively engage with the gear to drive the two support plates to move synchronously relative to the worktable.

[0006] In one optional embodiment, the motor is vertically mounted on the bottom of the worktable and has a first position and a second position that are movable relative to the worktable. In the first position, the drive shaft of the motor engages with the gear and is able to transmit torque to the gear. In the second position, the drive shaft of the motor disengages from the gear and is able to transmit torque to the turntable so that the turntable rotates circumferentially.

[0007] In one optional embodiment, the drive shaft of the motor is provided with an external thread. In the first position, the drive shaft of the motor is threadedly engaged with the gear. When the clamping unit clamps the pressure vessel and continues to rotate the drive shaft, the drive shaft can move axially relative to the gear to the second position.

[0008] In one optional embodiment, the drive shaft of the motor is provided with helical teeth, which, in the second position, are screwed into the helical groove of the turntable so that the drive shaft can transmit torque to the turntable.

[0009] In one alternative embodiment, the clamping unit includes a plurality of pressure mechanisms for applying pressure to the side of the pressure vessel, the plurality of pressure mechanisms being distributed in an array and capable of moving relative to the support plate toward or away from the pressure vessel.

[0010] In one optional embodiment, the pressure mechanism includes a first guide rod, a first mounting plate, a first return spring, and a pressure head; the first guide rod passes through the support plate and is axially movable relative to the support plate; the first mounting plate is disposed on the first guide rod and is able to move closer to or further away from the pressure vessel when the first guide rod moves axially; the first return spring is sleeved on the first guide rod and located between the support plate and the first mounting plate, for extending and retracting when the first guide rod moves axially; the pressure head is disposed on the side of the first mounting plate facing the pressure vessel and is used to abut against the side of the pressure vessel.

[0011] In one optional embodiment, the pressure head includes a second mounting plate, a plurality of second guide rods, a plurality of contact portions, and a plurality of second return springs; the second mounting plate is hinged to the side of the first mounting plate facing the pressure vessel; the plurality of second guide rods are laterally parallel and respectively pass through the second mounting plate, and are axially movable relative to the second mounting plate; the plurality of contact portions are respectively disposed at the ends of the plurality of second guide rods, and the pressure head abuts against the pressure vessel through the plurality of contact portions; the plurality of springs are respectively sleeved on the plurality of second guide rods for extending and retracting when the corresponding second guide rod moves axially.

[0012] In one alternative embodiment, the contact portion is a cylindrical structure that is rotatably disposed on the second guide rod and is capable of circumferential rotation when the pressure vessel rotates.

[0013] In one optional embodiment, the clamping unit further includes a limiting mechanism, which includes a first limiting plate and a first driving motor. The first limiting plate is slidably disposed on the support plate and has a first through hole. The first limiting plate is sleeved on the first guide rod through the first through hole. The first driving motor is disposed on the support plate and connected to the first limiting plate. The first driving motor is used to drive the first limiting plate to move radially relative to the first guide rod to press or release the first guide rod. When the first limiting plate presses the first guide rod, it restricts the first mounting plate from moving towards or away from the pressure vessel.

[0014] The above-mentioned technical solution of this application has the following beneficial technical effects:

[0015] The anti-detachment fixing device for nuclear power pressure vessel testing according to the embodiments of this application can fix the pressure vessel during testing, thereby improving the problem of shaking of the pressure vessel during the testing process, which is beneficial to improving the testing accuracy and preventing the pressure vessel from being scratched.

[0016] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. These drawings are incorporated in and constitute a part of this specification. They illustrate embodiments conforming to this application and, together with the specification, serve to explain the technical solutions of this application. It should be understood that the following drawings only show some embodiments of this application and should not be considered as limiting the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This invention provides a schematic diagram of the structure of an anti-detachment fixing device for testing nuclear power pressure vessels according to an embodiment of this application.

[0019] Figure 2 It shows Figure 1 A diagram from another perspective;

[0020] Figure 3 It shows Figure 1 A diagram from another perspective;

[0021] Figure 4 It shows Figure 3 Assembly diagram of the motor, gears, and turntable;

[0022] Figure 5 It shows Figure 1 Assembly diagram of the clamping unit;

[0023] Figure 6 It shows Figure 5 Assembly diagram of the intermediate pressure head;

[0024] Figure label:

[0025] 100. Worktable; 101. Circular hole; 102. Sliding groove; 110. Turntable; 111. Slot; 120. Rotating base; 121. Spiral groove; 200. Support unit; 210. Support plate; 220. Slider; 300. Drive unit; 310. Motor; 311. Drive shaft; 311a. External thread; 311b. Spiral tooth; 320. Gear; 330. Rack; 400. Clamping unit Yuan; 410, First guide rod; 420, First mounting plate; 430, First return spring; 440, Pressure head; 441, Second mounting plate; 442, Hinge joint; 443, Second guide rod; 444, Contact part; 445, Second return spring; 446, Second limiting plate; 446a, Second through hole; 447, Second drive motor; 450, First limiting plate; 451, First through hole; 460, First drive motor. Detailed Implementation

[0026] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0027] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0028] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0029] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] This application provides an anti-detachment fixing device for nuclear power pressure vessel testing, used to fix the pressure vessel during testing.

[0032] refer to Figure 1In some embodiments, the anti-detachment fixing device for nuclear power pressure vessel inspection includes a worktable 100, a support unit 200, a drive unit 300, and a clamping unit 400. The worktable 100 has a circumferentially rotatable turntable 110 for supporting the pressure vessel. The support unit 200 includes two support plates 210 movably disposed on the worktable 100 and located on opposite sides of the rotation unit. The drive unit 300 is disposed on the worktable 100 and is used to drive the support plates 210 to move relative to the worktable 100. The clamping unit 400 is disposed on the support plates 210 and is capable of clamping or releasing the pressure vessel when the support plates 210 move relative to the worktable 100. In practical use, the pressure vessel to be tested is first placed on the turntable 110. Then, the drive unit 300 drives the two support plates 210 to move on the worktable 100 until the two clamping units 400 abut against the opposite sides of the pressure vessel, thus fixing the pressure vessel. During subsequent testing, the pressure vessel can be rotated by turning the turntable 110 to facilitate testing at different positions. Specifically, this anti-detachment fixing device for nuclear power pressure vessel testing can fix the pressure vessel during testing, improving the problem of shaking during testing, enhancing testing accuracy, and preventing scratches on the pressure vessel.

[0033] refer to Figure 4 In some embodiments, a rotating base 120 is provided at the bottom of the turntable 110, and the rotating base 120 is rotatably disposed on the worktable 100. This arrangement enables the turntable 110 to rotate circumferentially relative to the worktable 100.

[0034] refer to Figure 1 and Figure 2 In some embodiments, the worktable 100 is provided with a circular hole 101 extending through its height, and the turntable 110 and the rotating base 120 are disposed in the circular hole 101. This arrangement allows the worktable 100 to limit the turntable 110, preventing the turntable 110 from tilting under pressure and causing the pressure vessel to fall.

[0035] refer to Figure 1 In some embodiments, the upper surface of the turntable 110 is flush with the upper surface of the worktable 100. This makes the surface of the worktable 100 neat and aesthetically pleasing.

[0036] refer to Figure 2 In some embodiments, the upper surface of the turntable 110 is provided with a plurality of slots 111. In actual use, the support legs of the pressure vessel can be inserted into the slots 111 to fix the pressure vessel circumferentially relative to the turntable 110. This arrangement can prevent the pressure vessel from falling off the turntable 110 when rotating.

[0037] refer to Figure 2 In some embodiments, the workbench 100 is provided with a sliding groove 102 extending through its height, and the support plate 210 is slidably disposed within the sliding groove 102. Specifically, the sliding groove 102 extends vertically, and a slider 220 is provided at the bottom of the support plate 210. The slider 220 is inserted into the sliding groove 102 and can drive the support plate 210 to slide horizontally within the sliding groove 102.

[0038] refer to Figure 3 In some embodiments, the drive unit 300 includes a motor 310, a gear 320, and two racks 330. The motor 310 is mounted on the worktable 100. The gear 320 is sleeved on the drive shaft 311 of the motor 310 and can rotate circumferentially under the action of the motor 310. The two racks 330 are respectively mounted on the two support plates 210 (slider 220) and mesh with the gear 320 respectively. When the gear 320 rotates circumferentially, the two racks 330 engage with the gear 320 respectively to drive the two support plates 210 to move synchronously relative to the worktable 100. This arrangement enables synchronous movement of the two support plates 210, and the two support plates 210 can be driven by the same motor 310, which can reduce the number of parts used, thereby reducing the weight of the equipment and lowering costs.

[0039] In some embodiments, the motor 310 is also used to drive the turntable 110 to rotate circumferentially relative to the worktable 100. Specifically, the motor 310 is vertically and vertically mounted on the bottom of the worktable 100 and has a first position and a second position that can move relative to the worktable 100. In the first position, the drive shaft 311 of the motor 310 engages with the gear 320 and can transmit torque to the gear 320. In the second position, the drive shaft 311 of the motor 310 disengages from the gear 320 and can transmit torque to the turntable 110, so that the turntable 110 rotates circumferentially. This arrangement allows the turntable 110 to be driven by the motor 310 to rotate circumferentially, thereby saving related rotating components, reducing equipment weight, and lowering costs.

[0040] refer to Figure 4 In some embodiments, the drive shaft 311 of the motor 310 is provided with an external thread 311a. In the first position, the drive shaft 311 of the motor 310 is threadedly engaged with the gear 320. When the clamping unit 400 clamps the pressure vessel and continues to rotate the drive shaft 311, the drive shaft 311 can move axially relative to the gear 320 to the second position. This configuration allows the motor 310 to achieve its own lifting and lowering by driving the rotation of its drive shaft 311. Compared to using a lifting platform, this saves the drive components that drive the motor 310 to lift and lower, which helps to reduce the weight of the equipment and lower costs.

[0041] refer to Figure 4In some embodiments, the drive shaft 311 of the motor 310 is provided with a helical retaining tooth 311b. In the second position, the helical retaining tooth 311b screws into the helical groove 121 of the turntable 110 (rotating base 120) to enable the drive shaft 311 to transmit torque to the turntable 110. Specifically, the helical retaining tooth 311b is located at the distal end (upper end) of the drive shaft 311. When the drive shaft 311 rises to the second position, the helical retaining tooth 311b screws into the helical groove 121. This arrangement allows the drive shaft 311 to be assembled with the turntable 110 simply by circumferential rotation. Furthermore, during the rotation of the drive shaft 311, the drive shaft 311 tends to rise, thereby preventing the drive shaft 311 from falling off the turntable 110 during rotation. It should be understood that in specific implementations, the helical groove 121 can be located at the axial center of the turntable 110, or it can be located at the outer periphery of the turntable 110.

[0042] refer to Figure 5 In some embodiments, the clamping unit 400 includes multiple pressure mechanisms for applying pressure to the sides of the pressure vessel. These pressure mechanisms are arranged in an array and are movable relative to the support plate 210 towards or away from the pressure vessel. This arrangement allows the clamping unit 400 to secure pressure vessels of different shapes. In this embodiment, there are nine pressure mechanisms arranged in three rows laterally, with three pressure mechanisms in each row.

[0043] refer to Figure 5 In some embodiments, the pressure mechanism includes a first guide rod 410, a first mounting plate 420, a first return spring 430, and a pressure head 440. The first guide rod 410 passes through the support plate 210 and is axially movable relative to the support plate 210. The first mounting plate 420 is disposed on the first guide rod 410 and is able to move closer to or away from the pressure vessel when the first guide rod 410 moves axially. The first return spring 430 is sleeved on the first guide rod 410 and located between the support plate 210 and the first mounting plate 420, and is used to extend and retract when the first guide rod 410 moves axially; that is, when the first guide rod 410 is not subjected to external force, the first return spring 430 can keep the second guide rod 440 in its initial position. The pressure head 440 is disposed on the side of the first mounting plate 420 facing the pressure vessel and is used to abut against the side of the pressure vessel. This arrangement enables the pressure mechanism to move relative to the support plate 210 towards or away from the pressure vessel. Furthermore, since the first return spring 430 can extend and retract when the first guide rod 410 moves axially, it not only helps the first guide post to reset after detection but also achieves a buffering effect. In this embodiment, each pressure mechanism has two pressure heads 440, which are arranged sequentially from top to bottom.

[0044] In some embodiments, the clamping unit 400 further includes a limiting mechanism for restricting the first mounting plate 420 from moving toward or away from the pressure vessel. Specifically, after the clamping unit 400 clamps the pressure vessel, the limiting mechanism can limit the pressure mechanism to prevent it from moving toward or away from the pressure vessel relative to the supporting plate 210 during the testing process, thereby preventing the pressure vessel from shaking.

[0045] refer to Figure 5 In some embodiments, the limiting mechanism includes a first limiting plate 450 and a first driving motor 460. The first limiting plate 450 is slidably disposed on the supporting upright plate 210 and has a first through hole 451. The first limiting plate 450 is sleeved on the first guide rod 410 through the first through hole 451. The first driving motor 460 may be a cylinder. The first driving motor 460 is disposed on the supporting upright plate 210 and connected to the first limiting plate 450. The first driving motor 460 is used to drive the first limiting plate 450 to move radially relative to the first guide rod 410 to press or release the first guide rod 410. When the first limiting plate 450 presses the first guide rod 410, it restricts the first mounting plate 420 from moving towards or away from the pressure vessel. This configuration enables the limiting mechanism to limit the pressure head 440, preventing the pressure head 440 from moving towards or away from the pressure vessel relative to the supporting upright plate 210 during the testing process, thereby preventing the pressure vessel from shaking. It should be understood that, in specific configurations, the first mounting plate 420 can move in a vertical direction. Of course, the first mounting plate 420 can also move in other directions, and this embodiment does not impose any limitations on this.

[0046] refer to Figure 6In some embodiments, the pressure head 440 includes a second mounting plate 441, a plurality of second guide rods 443, a plurality of contact portions 444, and a plurality of second return springs 445. The second mounting plate 441 is hinged to the side of the first mounting plate 420 facing the pressure vessel via a hinge joint 442. The plurality of second guide rods 443 pass through the second mounting plate 441 and are axially movable relative to the second mounting plate 441. The plurality of contact portions 444 are respectively disposed at the ends of the plurality of second guide rods 443, and the pressure head 440 abuts against the pressure vessel through the plurality of contact portions 444. A plurality of springs are respectively sleeved on the plurality of second guide rods 443 for extending and retracting when the corresponding second guide rod 443 moves axially. This arrangement can further increase the force-bearing points of the pressure vessel, which is beneficial to improving the fixing effect of the pressure vessel. Furthermore, since the second return springs 445 can extend and retract when the second guide rods 443 move axially, they can not only help the second guide rods reset after the detection is completed, but also achieve a buffering effect. Furthermore, since the second mounting plate 441 and the first mounting plate 420 are hinged together, the contact portion 444 can change its contact direction. Compared to adjusting the position solely by the second guide rod 443, this reduces the axial movement distance of the second guide rod 443, thus improving clamping efficiency. In this embodiment, there are two of each of the second guide rod 443, the contact portion 444, and the second return spring 445.

[0047] refer to Figure 6 In some embodiments, the contact portion 444 is a cylindrical structure that is rotatably disposed on the second guide rod 443 and can rotate circumferentially when the pressure vessel rotates. This arrangement transforms the friction between the pressure head 440 and the pressure vessel into rolling friction, reducing the frictional force between the pressure head 440 and the pressure vessel, thereby facilitating the circumferential rotation of the pressure vessel.

[0048] refer to Figure 6In some embodiments, the pressure head 440 further includes a second limiting plate 446 and a second drive motor 447. The second limiting plate 446 is slidably disposed on the second mounting plate 441 and has a second through hole 446a. The second limiting plate 446 is sleeved on the second guide rod 443 through the second through hole 446a. The second drive motor 447 may be a cylinder. The second drive motor 447 is disposed on the second mounting plate 441 and connected to the second limiting plate 446. The second drive motor 447 is used to drive the second limiting plate 446 to move radially relative to the second guide rod 443 to press or release the second guide rod 443. When pressing the second guide rod 443, the second limiting plate 446 restricts the contact portion 444 from moving towards or away from the pressure vessel. This configuration can limit the contact portion 444, preventing the contact portion 444 from moving towards or away from the pressure vessel relative to the second mounting plate 441 during the detection process, thereby preventing the pressure vessel from shaking. It should be understood that, in a specific configuration, the second mounting plate 441 can move in a vertical direction. Of course, the second mounting plate 441 can also move in other directions, and this embodiment does not impose any limitations on this.

[0049] The anti-detachment fixing device for nuclear power pressure vessel testing according to this application embodiment includes the following usage process:

[0050] During use, the operator places the pressure vessel to be tested on the turntable 110 of the workbench 100, allowing the support legs of the pressure vessel to engage in the slots 111 of the turntable 110. The motor 310 is then started, driving the drive shaft 311 to rotate. The drive shaft 311 drives the gear 320 to rotate synchronously in the same direction. The gear 320, through meshing, drives the rack 330 to move towards the center. The rack 330 drives the sliders 220 on both sides to move synchronously in the same direction along the sliding grooves 102. The sliders 220 drive the support plate 210 to move synchronously in the same direction. The support plate 210 drives the clamping unit 400 to move synchronously in the same direction until the contact portion 444 of the pressure head 440 contacts the outer wall of the pressure vessel to be tested. The gear 320 continues to rotate, and the pressure head 440 continues to move towards the center following the support plate 210. The pressure head 440, located in the center, experiences the reverse force of the pressure vessel. The pressure vessel moves outwards, simultaneously pushing the first guide rod 410 outwards. At this time, the first return spring 430 is compressed, and the pressure head 440 on the outside follows the shape of the outer wall of the pressure vessel. During the movement, the second mounting plate 441 rotates inwards relative to the first mounting plate 420 until all contact parts 444 are in contact with the outer wall of the pressure vessel. At this time, part of the second return spring 445 is also compressed, so that the pressure vessel is completely enclosed. Further, the operator controls the first drive motor 460 and the second drive motor 447, so that the first drive motor 460 pushes the first limit plate 450 downwards, so that the first limit plate 450 presses the first guide rod 410, so that the first guide rod 410 is fixed. The second drive motor 447 pushes the second limit plate 446 downwards, so that the second limit plate 446 presses the second guide rod 443, so that the second guide rod 443 is fixed.

[0051] When clamping is complete, the motor 310 continues to rotate, and the drive shaft 311 rotates circumferentially and moves axially relative to the gear 320. At this time, the external thread 311a of the drive shaft 311 disengages from the gear 320, and the gear 320 no longer rotates synchronously with the drive shaft 311. Furthermore, the helical teeth 311b at the upper end of the drive shaft 311 engage with the helical groove at the bottom of the rotating base 120. The drive shaft 311 drives the turntable 110 to rotate synchronously in the same direction, and the turntable 110 drives the pressure vessel to rotate synchronously in the same direction. At this time, the operator can adjust the speed of the motor 310 through PLC control according to the testing needs, making the pressure vessel easier to test.

[0052] After the test is completed, the motor 310 slowly reverses, driving the turntable 110 to rotate in the opposite direction via the drive shaft 311. During rotation, the helical teeth 311b rotate along the helical groove and move downwards, causing the drive shaft 311 to disengage from the turntable 110. When the drive shaft 311 disengages from the turntable 110, it begins to re-thread into the gear 320. The motor 310 drives the gear 320 to rotate synchronously and in the same direction via the drive shaft 311, causing the gear 320 to rotate in the opposite direction. Simultaneously, the gear 320, through meshing, drives the rack 330 to move outwards. The rack 330 drives the slider 220 to move outward, which in turn drives the support plate 210 to move outward. The support plate 210 then drives the clamping unit 400 to open outward simultaneously, releasing the pressure vessel. When the clamping unit 400 is fully open, the operator controls the first drive motor 460 and the second drive motor 447 to reset the first limit plate 450 and the second limit plate 446. Simultaneously, the first return spring 430 and the second return spring 445 reset the first guide rod 410 and the second guide rod 443. The operator can then remove the pressure vessel and proceed with the inspection of the next pressure vessel.

[0053] In summary, the anti-detachment fixing device for nuclear power pressure vessel testing according to the embodiments of this application can fix the pressure vessel during testing, thereby improving the problem of pressure vessel shaking during testing, which is beneficial to improving testing accuracy and preventing the pressure vessel from being scratched. Furthermore, during testing, the fixing device can allow the pressure vessel to rotate to cooperate with the testing equipment for all-around testing. In addition, the clamping unit 400 of the fixing device can be adaptively adjusted according to the shape of the pressure vessel, making it suitable for pressure vessels of different shapes.

[0054] One or more embodiments in this specification are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this specification should be included within the protection scope of this application.

[0055] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A device for preventing detachment during testing of nuclear power pressure vessels, characterized in that, include: The worktable has a turntable that can rotate circumferentially. The turntable is used to support the pressure vessel. The upper surface of the turntable is provided with a plurality of slots for the support legs of the pressure vessel to be inserted, so that the pressure vessel is circumferentially fixed relative to the turntable. The support unit includes two support plates, which are movably disposed on the worktable and located on opposite sides of the rotating unit. A drive unit is disposed on the worktable and is used to drive the support plate to move relative to the worktable; A clamping unit is disposed on the support plate and is capable of clamping or releasing the pressure vessel when the support plate moves relative to the worktable; The clamping unit includes a pressure mechanism for applying pressure to the side of the pressure vessel. The number of pressure mechanisms is multiple, and the multiple pressure mechanisms are distributed in an array. They are capable of moving relative to the support plate in a direction closer to or further away from the pressure vessel. The pressure mechanism includes a first guide rod, a first mounting plate, a first return spring, and a pressure head. The first guide rod passes through the support plate and is axially movable relative to the support plate. The first mounting plate is disposed on the first guide rod and is able to move closer to or further away from the pressure vessel when the first guide rod moves axially. The first return spring is sleeved on the first guide rod and located between the support plate and the first mounting plate, and is used to extend and retract when the first guide rod moves axially. The pressure head is disposed on the side of the first mounting plate facing the pressure vessel and is used to abut against the side of the pressure vessel. The pressure head includes a second mounting plate, a plurality of second guide rods, a plurality of contact portions, and a plurality of second return springs; the second mounting plate is hinged to the side of the first mounting plate facing the pressure vessel; the plurality of second guide rods are laterally parallel and respectively pass through the second mounting plate, and are axially movable relative to the second mounting plate; the plurality of contact portions are respectively disposed at the ends of the plurality of second guide rods, and the pressure head abuts against the pressure vessel through the plurality of contact portions; the plurality of springs are respectively sleeved on the plurality of second guide rods for extending and retracting when the corresponding second guide rod moves axially; The contact portion is a cylindrical structure that is rotatably mounted on the second guide rod and can rotate circumferentially when the pressure vessel rotates.

2. The anti-detachment fixing device for nuclear power pressure vessel testing according to claim 1, characterized in that, The drive unit includes a motor, a gear, and two racks; The motor is mounted on the workbench; The gear is sleeved on the drive shaft of the motor and can rotate circumferentially under the action of the motor; The two racks are respectively disposed on the two support plates and mesh with the gears respectively. When the gears rotate circumferentially, the two racks respectively engage with the gears to drive the two support plates to move synchronously relative to the worktable.

3. The anti-detachment fixing device for nuclear power pressure vessel testing according to claim 2, characterized in that, The motor is vertically mounted on the bottom of the worktable and has a first position and a second position that can move relative to the worktable. In the first position, the drive shaft of the motor engages with the gear and can transmit torque to the gear. In the second position, the drive shaft of the motor disengages from the gear and can transmit torque to the turntable to make the turntable rotate circumferentially.

4. The anti-detachment fixing device for nuclear power pressure vessel testing according to claim 3, characterized in that, The drive shaft of the motor is provided with an external thread. In the first position, the drive shaft of the motor is threadedly engaged with the gear. When the clamping unit clamps the pressure vessel and continues to rotate the drive shaft, the drive shaft can move axially relative to the gear to the second position.

5. The anti-detachment fixing device for nuclear power pressure vessel testing according to claim 3, characterized in that, The drive shaft of the motor is provided with helical teeth. In the second position, the helical teeth are screwed into the helical groove of the turntable so that the drive shaft can transmit torque to the turntable.

6. The anti-detachment fixing device for nuclear power pressure vessel testing according to claim 1, characterized in that, The clamping unit further includes a limiting mechanism, which includes a first limiting plate and a first driving motor. The first limiting plate is slidably disposed on the supporting upright plate and is provided with a first through hole. The first limiting plate is sleeved on the first guide rod through the first through hole. The first drive motor is disposed on the support plate and connected to the first limiting plate. The first drive motor is used to drive the first limiting plate to move radially relative to the first guide rod to press or release the first guide rod. When the first limiting plate presses the first guide rod, it restricts the first mounting plate from moving towards or away from the pressure vessel.

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