Anti-falling fixing device for nuclear power pressure vessel detection

Abstract

The invention provides an anti-falling fixing device for nuclear power pressure vessel detection, and the device comprises a workbench which is provided with a rotating disc capable of rotating in the circumferential direction, and the rotating disc is used for bearing a pressure vessel; the supporting unit comprises two supporting vertical plates, and the two supporting vertical plates are movably arranged on the workbench and located on the two opposite sides of the rotating unit respectively; the driving unit is arranged on the workbench and used for driving the supporting vertical plate to move relative to the workbench; and the number of the clamping units is two, and the two clamping units are arranged on the two supporting vertical plates correspondingly and can clamp or loosen the pressure container when the supporting vertical plates move relative to the workbench. According to the anti-falling fixing device for nuclear power pressure vessel detection, the pressure vessel can be fixed when the pressure vessel is detected, so that the problem that the pressure vessel shakes in the detection process is solved, the detection precision is improved, and the pressure vessel is prevented from being scratched.

Description

Technical Field

[0001] The present application relates to auxiliary equipment for detecting nuclear power pressure vessels, and in particular to an anti-fall-off fixing device for detecting nuclear power pressure vessels. Background Art

[0002] Pressure vessel surface inspection is a necessary technology for the manufacturing of high-end equipment such as boilers and other pressure vessels. Specifically, it refers to the use of non-destructive testing methods to check whether there are defects on the surface and near-surface of the pressure vessel, such as cracks, in order to ensure the safety performance and service life of the pressure vessel. In the inspection of pressure vessels. Normally, it is necessary to manually use inspection equipment to inspect the overall structure of the boiler pressure vessel to determine the integrity of the boiler pressure vessel. However, during the inspection process, since most pressure vessels are cylindrical structures with relatively smooth surfaces, and need to withstand various forces such as pressure fluctuations, temperature changes, and vibrations from the inside, the use of general fixed brackets will cause the pressure vessel to shake during the inspection process, making it impossible to guarantee the inspection accuracy and easily damaging the pressure vessel itself. Summary of the invention

[0003] The embodiments of the present application at least provide an anti-fall-off fixing device for nuclear power pressure vessel inspection, which can fix the pressure vessel when inspecting the pressure vessel to improve the problem of shaking of the pressure vessel during the inspection process, which is beneficial to improving the inspection accuracy and avoiding scratches on the pressure vessel.

[0004] An embodiment of the present application provides an anti-fall-off fixing device for detecting nuclear power pressure vessels, comprising: a workbench having a turntable that can rotate in a circumferential direction, wherein the turntable is used to carry the pressure vessel; a supporting unit comprising two supporting uprights, wherein the two supporting uprights are movably arranged on the workbench and are respectively located on opposite sides of the rotating unit; a driving unit is arranged on the workbench and is used to drive the supporting uprights to move relative to the workbench; a clamping unit comprising two clamping units, wherein the two clamping units are respectively arranged on the two supporting uprights and can clamp or release the pressure vessel when the supporting uprights move relative to the workbench.

[0005] In an optional embodiment, the driving unit includes a motor, a gear and two racks; the motor is arranged on the workbench; the gear is sleeved on the driving shaft of the motor and can rotate circumferentially under the action of the motor; the two racks are respectively arranged on the two supporting plates and are respectively meshed with the gears, and when the gears rotate circumferentially, the two racks respectively cooperate with the gears to drive the two supporting plates to move synchronously relative to the workbench.

[0006] In an optional embodiment, the motor is liftably disposed at the bottom of the workbench and has a first position and a second position that are movable relative to the workbench. In the first position, the drive shaft of the motor is engaged with the gear and can transmit torque to the gear. In the second position, the drive shaft of the motor is disengaged from the gear and can transmit torque to the turntable to make the turntable rotate circumferentially.

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

[0008] In an optional embodiment, the driving shaft of the motor is provided with a spiral latching tooth, and in the second position, the spiral latching tooth is screwed into the spiral latching groove of the turntable, so that the driving shaft can transmit torque to the turntable.

[0009] In an optional embodiment, the clamping unit includes a pressure mechanism for applying pressure to the side of the pressure vessel. The number of the pressure mechanisms is multiple, and the multiple pressure mechanisms are distributed in an array and can move toward or away from the pressure vessel relative to the supporting plate.

[0010] In an 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 is inserted through the support vertical plate and can move axially relative to the support vertical plate; the first mounting plate is arranged on the first guide rod and can approach or move away from the pressure vessel when the first guide rod moves axially; the first return spring is sleeved on the first guide rod and is located between the support vertical plate and the first mounting plate, and is used to extend and retract when the first guide rod moves axially; the pressure head is arranged 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 an 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 transversely parallel and respectively penetrate the second mounting plate, and can move axially relative to the second mounting plate; the plurality of contact portions are respectively arranged 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 contact portions are respectively sleeved on the plurality of second guide rods, and are used to extend and retract when the corresponding second guide rods move axially.

[0012] In an optional embodiment, the contact portion is a cylindrical structure, which is rotatably disposed on the second guide rod and can rotate circumferentially when the pressure container rotates.

[0013] In an optional embodiment, the clamping unit also 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 vertical plate and is provided with a first through hole, and the first limiting plate is sleeved on the first guide rod through the first through hole; the first driving motor is disposed on the supporting vertical plate and connected to the first limiting plate, and the first driving motor is used to drive the first limiting plate to move radially relative to the first guide rod to tighten or loosen the first guide rod, and when the first limiting plate tightens the first guide rod, it limits the movement of the first mounting plate in a direction close to or away from the pressure vessel.

[0014] The above technical solution of the present application has the following beneficial technical effects:

[0015] The anti-fall-off fixing device for nuclear power pressure vessel inspection in the embodiment of the present application can fix the pressure vessel when inspecting the pressure vessel to improve the problem of shaking of the pressure vessel during the inspection process, which is beneficial to improving the inspection accuracy and avoiding scratches on the pressure vessel.

[0016] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. The drawings herein are incorporated into the specification and constitute a part of the specification. These drawings illustrate embodiments consistent with the present application and are used together with the specification to illustrate the technical solutions of the present application. It should be understood that the following drawings only illustrate certain embodiments of the present application and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can also be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic structural diagram of an anti-falling fixing device for detecting a nuclear power pressure vessel provided in an embodiment of the present application is shown;

[0019] Figure 2 Shows Figure 1 Schematic diagram from another perspective;

[0020] Figure 3 Shows Figure 1 Schematic diagram from another perspective;

[0021] Figure 4 Shows Figure 3 The assembly diagram of the motor, gear and turntable;

[0022] Figure 5 Shows Figure 1 Assembly diagram of the middle clamping unit;

[0023] Figure 6 Shows Figure 5 Assembly diagram of the medium pressure head;

[0024] Reference numerals:

[0025] 100, workbench; 101, round hole; 102, sliding slot; 110, turntable; 111, slot; 120, rotating base; 121, spiral slot; 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 Element; 410, first guide rod; 420, first mounting plate; 430, first return spring; 440, pressure head; 441, second mounting plate; 442, hinge head; 443, second guide rod; 444, contact portion; 445, second return spring; 446, second limit plate; 446a, second through hole; 447, second driving machine; 450, first limit plate; 451, first through hole; 460, first driving machine. DETAILED DESCRIPTION

[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 of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0027] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0028] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] An embodiment of the present application provides an anti-falling fixing device for nuclear power pressure vessel inspection, which is used to fix the pressure vessel when inspecting the pressure vessel.

[0032] refer to Figure 1In some embodiments, an anti-dropping fixture for nuclear power pressure vessel inspection includes a workbench 100, a support unit 200, a drive unit 300, and a clamping unit 400. The workbench 100 has a turntable 110 that can rotate in a circumferential direction, and the turntable 110 is used to carry the pressure vessel. The support unit 200 includes two support uprights 210, and the two support uprights 210 are movably arranged on the workbench 100 and are respectively located on opposite sides of the rotating unit. The drive unit 300 is arranged on the workbench 100, and is used to drive the support uprights 210 to move relative to the workbench 100. The clamping unit 400 is arranged on the support uprights 210, and can clamp or release the pressure vessel when the support uprights 210 move relative to the workbench 100. During specific use, the pressure vessel to be inspected is first placed on the turntable 110, and then the driving unit 300 is used to drive the two supporting plates 210 to move on the workbench 100 until the two clamping units 400 are respectively in contact with the opposite sides of the pressure vessel, thereby fixing the pressure vessel. In the subsequent inspection process, the pressure vessel can be rotated by rotating the turntable 110 to facilitate inspection of different positions of the pressure vessel. Specifically, the anti-fall-off fixing device for nuclear power pressure vessel inspection can fix the pressure vessel when inspecting the pressure vessel, so as to improve the problem of shaking of the pressure vessel during the inspection process, which is conducive to improving the inspection accuracy and avoiding scratches on the pressure vessel.

[0033] refer to Figure 4 In some embodiments, a rotating base 120 is disposed at the bottom of the turntable 110, and the rotating base 120 is rotatably disposed on the workbench 100. In this way, the turntable 110 can be rotatable relative to the workbench 100.

[0034] refer to Figure 1 and Figure 2 In some embodiments, a circular hole 101 is provided on the workbench 100 and runs through the height thereof, and the turntable 110 and the rotating base 120 are arranged in the circular hole 101. In this way, the workbench 100 can limit the turntable 110 to prevent the turntable 110 from tilting under the action of 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 workbench 100. In this way, the surface of the workbench 100 can be made neat and beautiful.

[0036] refer to Figure 2 In some embodiments, a plurality of slots 111 are provided on the upper surface of the turntable 110. In specific use, the 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 that runs through the height thereof, and the support upright plate 210 is slidably disposed in the sliding groove 102. Specifically, the sliding groove 102 runs through from top to bottom, and a slider 220 is disposed at the bottom of the support upright plate 210. The slider 220 is inserted into the sliding groove 102 and can drive the support upright plate 210 to slide horizontally in the sliding groove 102.

[0038] refer to Figure 3 In some embodiments, the driving unit 300 includes a motor 310, a gear 320 and two racks 330. The motor 310 is disposed on the workbench 100. The gear 320 is sleeved on the driving shaft 311 of the motor 310 and can rotate circumferentially under the action of the motor 310. The two racks 330 are respectively disposed on the two supporting plates 210 (the sliders 220) and are respectively meshed with the gears 320. When the gears 320 rotate circumferentially, the two racks 330 respectively cooperate with the gears 320 to drive the two supporting plates 210 to move synchronously relative to the workbench 100. This arrangement can achieve synchronous movement of the two supporting plates 210, and the two supporting 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 reducing costs.

[0039] In some embodiments, the motor 310 is also used to drive the turntable 110 to rotate circumferentially relative to the workbench 100. Specifically, the motor 310 is arranged at the bottom of the workbench 100 in a liftable manner, and has a first position and a second position that moves relative to the workbench 100. In the first position, the drive shaft 311 of the motor 310 is matched with the gear 320 and can transmit torque to the gear 320. In the second position, the drive shaft 311 of the motor 310 is released from the gear 320 and can transmit torque to the turntable 110 to make the turntable 110 rotate circumferentially. In this way, the turntable 110 can be driven by the motor 310 to rotate circumferentially, thereby saving related rotating components, which is conducive to reducing the weight of the equipment and reducing 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 matched 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 to the second position relative to the gear 320. This arrangement enables the motor 310 to drive its drive shaft 311 to rotate to achieve its own lifting. Compared with the method of using a lifting platform, this can save the driving components that drive the motor 310 to lift and lower, which is conducive to reducing the weight of the equipment and reducing costs.

[0041] refer to Figure 4In some embodiments, the driving shaft 311 of the motor 310 is provided with a spiral clamping tooth 311b. When in the second position, the spiral clamping tooth 311b is screwed into the spiral clamping groove 121 of the rotating disk 110 (the rotating base 120), so that the driving shaft 311 can transmit torque to the rotating disk 110. Specifically, the spiral clamping tooth 311b is provided at the distal end (upper end) of the driving shaft 311. When the driving shaft 311 rises to the second position, the spiral clamping tooth 311b is screwed into the spiral clamping groove 121. In this way, the driving shaft 311 only needs to rotate in the circumferential direction to achieve the assembly with the rotating disk 110, and during the rotation of the driving shaft 311, the driving shaft 311 has a tendency to rise, so as to prevent the driving shaft 311 from falling off the rotating disk 110 during the rotation. It should be understood that in a specific implementation, the spiral clamping groove 121 can be provided at the axial center position of the rotating disk 110, or can be provided at the peripheral position of the rotating disk 110.

[0042] refer to Figure 5 In some embodiments, the clamping unit 400 includes a pressure mechanism for applying pressure to the side of the pressure vessel. The number of the pressure mechanisms is multiple, and the multiple pressure mechanisms are arranged in an array and can move toward or away from the pressure vessel relative to the support plate 210. This arrangement enables the clamping unit 400 to fix pressure vessels of different shapes. In this embodiment, the number of the pressure mechanisms is nine. In the horizontal direction, the pressure units are divided into three columns, and the number of pressure units in each column is three.

[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 is inserted into the support plate 210 and can move axially relative to the support plate 210. The first mounting plate 420 is arranged on the first guide rod 410 and can 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 is 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 443 in the initial position. The pressure head 440 is arranged 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. In this way, the pressure mechanism can move in the direction of approaching or moving away from the pressure vessel relative to the support plate 210. In addition, since the first reset spring 430 can be extended and retracted when the first guide rod 410 moves axially, it can not only help the first guide column to reset after the detection is completed, but also achieve a buffering effect. In this embodiment, each pressure mechanism has two pressure heads 440, and the two pressure heads 440 are arranged in sequence from top to bottom.

[0044] In some embodiments, the clamping unit 400 further includes a limiting mechanism, which is used to limit 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 the pressure mechanism from moving toward or away from the pressure vessel relative to the supporting plate 210 during the detection 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 machine 460. The first limiting plate 450 is slidably disposed on the supporting plate 210 and is provided with 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 machine 460 can be a cylinder. The first driving machine 460 is disposed on the supporting plate 210 and connected to the first limiting plate 450. The first driving machine 460 is used to drive the first limiting plate 450 to move radially relative to the first guide rod 410 to press or loosen the first guide rod 410. When the first limiting plate 450 presses the first guide rod 410, it limits the first mounting plate 420 from moving in a direction close to or away from the pressure vessel. In this way, the limiting mechanism can limit the pressure head 440, preventing the pressure head 440 from moving in a direction close to or away from the pressure vessel relative to the supporting plate 210 during the detection process, thereby preventing the pressure vessel from shaking. It should be understood that, in a specific configuration, the moving direction of the first mounting plate 420 may be an up-down direction. Of course, the moving direction of the first mounting plate 420 may also be other directions, and the present embodiment of the application does not impose any limitation 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 through a hinge joint 442. The plurality of second guide rods 443 are arranged on the second mounting plate 441 and can move axially relative to the second mounting plate 441. The plurality of contact portions 444 are respectively arranged at the ends of the plurality of second guide rods 443, and the pressure head 440 abuts the pressure vessel through the plurality of contact portions 444. The plurality of contact portions 444 are respectively sleeved on the plurality of second guide rods 443, and are used to extend and retract when the corresponding second guide rods 443 move axially. Such a configuration can further increase the force points of the pressure vessel, which is conducive to improving the fixing effect of the pressure vessel. In addition, since the second return spring 445 can extend and retract when the second guide rod 443 moves axially, it can not only help the second guide column to reset after the detection is completed, but also achieve a buffering effect. In addition, due to the hinged connection between the second mounting plate 441 and the first mounting plate 420, the contact portion 444 can change the contact direction, which can reduce the axial movement distance of the second guide rod 443 compared to the method of adjusting the position only by the second guide rod 443, which is conducive to improving the clamping efficiency. In this embodiment, the number of the second guide rod 443, the contact portion 444 and the second return spring 445 are all two.

[0047] refer to Figure 6 In some embodiments, the contact portion 444 is a cylindrical structure, which is rotatably disposed on the second guide rod 443 and can rotate circumferentially when the pressure vessel rotates. This arrangement makes the friction between the pressure head 440 and the pressure vessel become rolling friction, which can reduce the friction 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 limit plate 446 and a second driver 447. The second limit plate 446 is slidably disposed on the second mounting plate 441 and is provided with a second through hole 446a. The second limit plate 446 is sleeved on the second guide rod 443 through the second through hole 446a. The second driver 447 may be a cylinder. The second driver 447 is disposed on the second mounting plate 441 and connected to the second limit plate 446. The second driver 447 is used to drive the second limit plate 446 to move radially relative to the second guide rod 443 to press or release the second guide rod 443. When the second limit plate 446 presses the second guide rod 443, it limits the contact portion 444 from moving in a direction close to or away from the pressure vessel. In this way, the contact portion 444 can be limited, and the contact portion 444 can be prevented from moving relative to the second mounting plate 441 in a direction close to or away from the pressure vessel during the detection process, thereby preventing the pressure vessel from shaking. It should be understood that, in a specific configuration, the moving direction of the second mounting plate 441 may be an up-down direction. Of course, the moving direction of the second mounting plate 441 may also be other directions, and the present embodiment of the application does not impose any limitation on this.

[0049] The anti-fall-off fixing device for detecting a nuclear power pressure vessel according to an embodiment of the present application includes the following steps:

[0050] When in use, the staff places the pressure vessel to be inspected on the turntable 110 of the workbench 100, so that the supporting foot of the pressure vessel is stuck in the slot 111 of the turntable 110, and further starts the motor 310. The motor 310 drives the driving shaft 311 to rotate, and the driving shaft 311 drives the gear 320 to rotate synchronously in the same direction. The gear 320 drives the rack 330 to move toward the center through meshing, and the rack 330 drives the sliders 220 on both sides to move synchronously in the same direction along the sliding groove 102. The slider 220 drives the supporting vertical plate 210 to move synchronously in the same direction, and the supporting vertical 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 inspected, and the gear 320 continues to rotate, and the pressure head 440 continues to move in the center with the supporting vertical plate 210. The pressure head 440 at the center is under the reverse force of the pressure vessel The first guide rod 410 is pushed outward while the first return spring 430 is compressed. The pressure head 440 on the outside follows the shape of the outer wall of the pressure vessel and rotates inward relative to the first mounting plate 420 through the second mounting plate 441 during the movement until all the contact portions 444 are attached to 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 wrapped. Further, the staff controls the first driving motor 460 and the second driving motor 447, so that the first driving motor 460 pushes the first limiting plate 450 to move downward, so that the first limiting plate 450 presses the first guide rod 410, so that the first guide rod 410 is fixed. The second driving motor 447 pushes the second limiting plate 446 to move downward, so that the second limiting plate 446 presses the second guide rod 443, so that the second guide rod 443 is fixed.

[0051] When the clamping is completed, 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 is disengaged from the gear 320, and the gear 320 no longer rotates synchronously with the drive shaft 311. In addition, the spiral tooth 311b at the upper end of the drive shaft 311 is engaged with the spiral groove set 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 staff can adjust the speed of the motor 310 through PLC control according to the detection needs, so that the pressure vessel is easier to detect.

[0052] After the detection is completed, the motor 310 slowly reverses and drives the turntable 110 to rotate in the opposite direction through the drive shaft 311. During the rotation, the spiral tooth 311b rotates along the spiral groove and moves downward, so that the drive shaft 311 is disengaged from the turntable 110. When the drive shaft 311 is disengaged from the turntable 110, the drive shaft 311 begins to be threadedly connected with the gear 320 again. The motor 310 drives the gear 320 to rotate synchronously in the same direction through the drive shaft 311, so that the gear 320 rotates in the opposite direction. At the same time, the gear 320 drives the rack 330 to move outward through meshing. The rack 330 drives the slider 220 to move outward, the slider 220 drives the support plate 210 to move outward, the support plate 210 drives the clamping unit 400 to open outward synchronously, so that the clamping unit 400 releases the pressure vessel. When the clamping unit 400 is fully opened, the staff controls the first driving machine 460 and the second driving machine 447 to reset the first limit plate 450 and the second limit plate 446. At the same time, the first guide rod 410 and the second guide rod 443 are reset under the action of the first reset spring 430 and the second reset spring 445. The staff can take out the pressure vessel and test the next pressure vessel.

[0053] In summary, the anti-drop-off fixture for nuclear power pressure vessel inspection of the embodiment of the present application can fix the pressure vessel when inspecting the pressure vessel to improve the problem of shaking of the pressure vessel during the inspection process, which is conducive to improving the inspection accuracy and avoiding scratches on the pressure vessel. Moreover, during the inspection process, the fixture can rotate the pressure vessel to cooperate with the inspection equipment for all-round inspection. In addition, the clamping unit 400 of the fixture can be adaptively adjusted according to the shape of the pressure vessel, so that it can be applied to pressure vessels of different shapes.

[0054] One or more embodiments of 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 of this specification should be included in the scope of protection of this application.

[0055] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A nuclear power pressure vessel detection anti-falling fixing device, characterized in that: include: A workbench, having a turntable capable of circumferential rotation, wherein the turntable is used to carry the pressure vessel; A supporting unit, comprising two supporting upright plates, the two supporting upright plates are movably arranged on the workbench and are respectively located on two opposite sides of the rotating unit; A driving unit, disposed on the workbench and used to drive the supporting vertical plate to move relative to the workbench; The clamping unit is arranged on the supporting plate and can clamp or release the pressure container when the supporting plate moves relative to the workbench.

2. The anti-falling fixing device for nuclear power pressure vessel detection according to claim 1 is characterized in that: The driving unit includes a motor, a gear and two racks; The motor is arranged on the workbench; The gear is sleeved on the driving shaft of the motor and can rotate in the circumferential direction under the action of the motor; The two racks are respectively arranged on the two supporting plates and are respectively meshed with the gears. When the gears rotate circumferentially, the two racks are respectively matched with the gears to drive the two supporting plates to move synchronously relative to the workbench.

3. The anti-falling fixing device for nuclear power pressure vessel detection according to claim 2 is characterized in that: The motor is liftably arranged at the bottom of the workbench and has a first position and a second position that moves relative to the workbench. In the first position, the drive shaft of the motor cooperates with the gear and can transmit torque to the gear. In the second position, the drive shaft of the motor is released from the gear and can transmit torque to the turntable to make the turntable rotate circumferentially.

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

5. The anti-falling fixing device for nuclear power pressure vessel detection according to claim 3 is characterized in that: The driving shaft of the motor is provided with a spiral latching tooth. When in the second position, the spiral latching tooth is screwed into the spiral latching groove of the rotating disk, so that the driving shaft can transmit torque to the rotating disk.

6. The anti-falling fixing device for nuclear power pressure vessel detection according to claim 1 is characterized in that: The clamping unit includes a pressure mechanism for applying pressure to the side of the pressure vessel. The number of the pressure mechanisms is multiple, and the multiple pressure mechanisms are distributed in an array and can move relative to the supporting plate toward or away from the pressure vessel.

7. The anti-falling fixing device for nuclear power pressure vessel detection according to claim 6 is characterized in that: The pressure mechanism comprises a first guide rod, a first mounting plate, a first return spring and a pressure head; The first guide rod is disposed through the support plate and is capable of axially moving relative to the support plate; The first mounting plate is disposed on the first guide rod and is capable of moving closer to or farther 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 vertical plate and the first mounting plate, and is used for extending and retracting when the first guide rod moves axially; The pressure head is arranged on a side of the first mounting plate facing the pressure vessel, and is used for abutting against a side surface of the pressure vessel.

8. The anti-falling fixing device for nuclear power pressure vessel detection according to claim 7 is characterized in that: 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 a side of the first mounting plate facing the pressure vessel; A plurality of second guide rods are transversely parallel and respectively penetrate the second mounting plate, and are capable of axially moving relative to the second mounting plate; The plurality of contact portions are respectively arranged at the ends of the plurality of second guide rods, and the pressure head abuts against the pressure container through the plurality of contact portions; The plurality of said second guide rods are respectively sleeved on the plurality of said second guide rods, and are used for extending and retracting when the corresponding second guide rods move axially.

9. The anti-falling fixing device for nuclear power pressure vessel detection according to claim 8, characterized in that: The contact portion is a cylindrical structure, which is rotatably disposed on the second guide rod and can rotate circumferentially when the pressure container rotates.

10. The anti-falling fixing device for nuclear power pressure vessel detection according to claim 7, characterized in that: The clamping unit further comprises a limiting mechanism, wherein the limiting mechanism comprises a first limiting plate and a first driving machine; The first limiting plate is slidably disposed on the supporting vertical plate and is provided with a first through hole, and the first limiting plate is sleeved on the first guide rod through the first through hole; The first driving motor is arranged on the supporting 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 tighten or loosen the first guide rod. When the first limiting plate tightens the first guide rod, it limits the first mounting plate from moving in a direction close to or away from the pressure vessel.

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