Nuclear power plant fuel assembly ultrasonic inspection equipment lifting device

Abstract

The utility model relates to a nuclear power plant fuel assembly ultrasonic inspection equipment hoisting device, which comprises a mounting frame and a hoisting mechanism, the mounting frame is used for placing ultrasonic inspection equipment, the mounting frame comprises a bearing plate, at least two upper connecting pieces and at least two lower connecting pieces, the lower end parts of the lower connecting pieces are connected with the bearing plate, and the upper end parts of the lower connecting pieces are connected with the hoisting mechanism. The upper end part of the upper connecting piece is rotatably connected with the lower end part of the upper connecting piece; the hoisting mechanism comprises a hoisting ring used for being connected with hoisting equipment and a cable assembly used for automatically winding and unwinding a cable, and the cable assembly is connected with the mounting frame and the hoisting ring. According to the utility model, the stability of the ultrasonic inspection equipment in the lifting process can be improved, the workload is reduced, the working efficiency is improved, the potential error probability of lifting is reduced, and the pollution risk of personnel is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of nondestructive testing, in particular to a lifting device for ultrasonic inspection equipment of fuel assemblies in nuclear power plants. Background Art

[0002] Due to the particularity of the status and operating conditions of nuclear power plant units, it is necessary to perform ultrasonic inspections on fuel assemblies. At present, the ultrasonic inspection equipment for nuclear power plant fuel assemblies (hereinafter referred to as the inspection equipment) is an automated, computer-controlled ultrasonic inspection equipment used to inspect the damage of fuel assemblies. During the inspection work, the inspection equipment is hoisted in the on-site plant. During the ultrasonic inspection of fuel assemblies, the equipment needs to be hoisted into the spent fuel pool and stably placed on the fuel grid. After the fuel assembly is operated and placed in the inspection position of the ultrasonic inspection equipment for the fuel assembly, the equipment begins automated inspection.

[0003] The existing lifting device is directly welded on the inspection equipment, and a ring structure is welded on the lifting tool rack for tying the slings. During the lifting process, the sling operators use multiple slings and frequently change them. After connecting multiple slings, they are hoisted into the spent fuel pool. During the frequent replacement of slings, there is a potential possibility of loosening, which may cause the equipment to fall.

[0004] During the maintenance and repair of the ultrasonic inspection equipment for fuel assemblies, the lifting device also blocked part of the path, affecting the removal of some equipment. Since the equipment itself has a certain radiation dose, the lifting device increases the maintenance time of the maintenance personnel and also increases the dose level of the personnel, which is not conducive to radiation protection. At the same time, the lifting tool rack welded with the inspection equipment cannot be moved, and the equipment shakes during the lifting process, which may affect the stability of the equipment after launching. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a lifting device for ultrasonic inspection equipment of nuclear power plant fuel assemblies.

[0006] The utility model adopts the following technical solutions:

[0007] A lifting device for ultrasonic inspection equipment of nuclear power plant fuel assembly is constructed, comprising:

[0008] A mounting frame for placing an ultrasonic inspection device, comprising a supporting plate and at least two upper connecting members and at least two lower connecting members, wherein the lower ends of the lower connecting members are connected to the supporting plate, and the upper ends are rotatably connected to the lower ends of the upper connecting members; and

[0009] The hoisting mechanism comprises a lifting ring for connecting with the lifting equipment and a cable assembly for automatically retracting and releasing the cable, wherein the cable assembly is respectively connected with the mounting frame and the lifting ring.

[0010] In some embodiments, the mounting frame further includes at least one top connecting member, and the top connecting member is respectively connected to the upper connecting member and the lifting mechanism.

[0011] In some embodiments, the upper connecting member, the lower connecting member and the top connecting member are all in the shape of longitudinal rods, the number of the upper connecting members and the lower connecting members are multiple and are arranged one by one, and the two ends of the top connecting member are respectively connected to different upper connecting members.

[0012] In some embodiments, the mounting frame further includes a plurality of reinforcing rib plates, both ends of which are respectively connected to two adjacent upper connecting members and / or two adjacent lower connecting members that rotate synchronously.

[0013] In some embodiments, the mounting frame also includes a cylindrical limiting assembly, and the lower end of the upper connecting member and the upper end of the lower connecting member are both formed with circular through holes, and the limiting assembly is respectively inserted into the through holes of the upper connecting member and the corresponding lower connecting member.

[0014] In some embodiments, the limiting assembly includes a main body, a pull ring, a pull rod, a first return spring, a baffle, a pull rope, at least one limiting member and at least one second return spring. The main body is in the shape of a longitudinally long hollow cylinder, including a longitudinally long penetration portion and a stop portion arranged at one end of the penetration portion. The pull rod is movably penetrated on the main body along the axial direction, and one end extends from the stop portion. The pull ring is arranged at the end of the pull rod that extends out. The baffle is located in the main body and fixed to the pull rod. The first return spring is sleeved on the pull rod and arranged between the baffle and the pull ring. The two ends of the pull rope are respectively connected to the limiting member and the other end of the pull rod.

[0015] At least one connecting hole is formed along the circumferential direction at one end of the penetration portion away from the blocking portion, the limiting member is penetrated in the connecting hole, the second return spring is sleeved on the limiting member, and the two ends are respectively connected to the inner wall surface of the penetration portion and the limiting member.

[0016] In some embodiments, the cable assembly includes a cable recovery tray, a rotating shaft and a motor, the rotating shaft and the output shaft of the motor rotate synchronously through a transmission structure, the rotating shaft and the cable recovery tray are coaxially arranged, the cable is wound on the cable recovery tray, and the cable recovery tray and the free ends of the cable are respectively connected to the hanging ring and the mounting frame.

[0017] In some embodiments, the hoisting mechanism further includes a connecting member, and the connecting member is respectively fixed to the free end of the cable and the mounting frame;

[0018] The connecting piece includes a buckle, a connecting ring, a fixing bolt and a hollow body. The free end of the cable is inserted into the body, passes through the connecting ring and is fixed to itself through the buckle to form an annular structure. The connecting ring is fixed on the fixing bolt, and the fixing bolt is fixed in the body.

[0019] In some embodiments, a video mechanism is also included. The video mechanism includes a video terminal and a lighting component, and is fixed to the mounting frame or the hanging mechanism through a fastening structure.

[0020] In some embodiments, a control mechanism is further included, and the control mechanism is electrically connected to the cable assembly; or the control mechanism is electrically connected to the cable assembly and the ultrasonic inspection device.

[0021] The utility model has the following advantages:

[0022] The utility model constructs a mounting frame in which an upper connecting member and a lower connecting member are rotatably connected, so that the influence of the shaking of the lifting mechanism on the ultrasonic inspection equipment during the lifting process can be reduced, thereby improving the stability of the ultrasonic inspection equipment during the lifting process;

[0023] By constructing a cable assembly that can automatically retract and release cables, there is no need to frequently replace the slings during the lifting process, which can reduce workload, improve work efficiency, reduce the potential probability of errors in lifting, and reduce the risk of contamination to personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the utility model, the 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 certain embodiments of the utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0025] Figure 1 It is a structural schematic diagram of a lifting device for ultrasonic inspection equipment of a nuclear power plant fuel assembly in one embodiment of the utility model;

[0026] Figure 2 yes Figure 1 A schematic diagram of the structure of the mounting frame shown;

[0027] Figure 3 yes Figure 1 The structural schematic diagram of the limit assembly shown;

[0028] Figure 4 yes Figure 3 The schematic diagram of the use status of the limit assembly shown;

[0029] Figure 5 yes Figure 1 A schematic diagram of the structure of the cable assembly shown;

[0030] Figure 6 yes Figure 1 Schematic diagram of the structure of the connecting parts shown. DETAILED DESCRIPTION

[0031] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "rear", "up", "down", "left", "right", "vertical", "horizontal", "bottom", "inside", "inside", "outside", etc. are based on the directions or positional relationships shown in some of the drawings, and are constructed and operated in a specific direction. They are only for the convenience of describing the present technical solution, and do not indicate that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0032] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0033] In the following description, specific details such as specific system structures and technologies are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details that hinder the description of the present invention.

[0034] Figure 1 A lifting device 1 for ultrasonic inspection equipment of a nuclear power plant fuel assembly in an embodiment of the utility model is shown, which is used to lift the ultrasonic inspection equipment 2 deep into the inspection position of the spent fuel pool when ultrasonic inspection is performed on the fuel assembly, so that it can be stably maintained at the inspection position to complete the ultrasonic inspection work.

[0035] The lifting device 1 for ultrasonic inspection equipment of fuel assemblies in nuclear power plants includes a mounting frame 10 and a lifting mechanism 20, wherein the mounting frame 10 is used to install and place ultrasonic inspection equipment 2, and the lifting mechanism 20 is respectively connected to the mounting frame 10 and the lifting equipment in the plant (such as a crane, etc.), and is used to cooperate with the mounting frame 10 to lift the ultrasonic inspection equipment 2 to the detection position.

[0036] Specifically, see Figure 2 The mounting frame 10 includes a supporting plate 11, at least two upper connecting members 12 and at least two lower connecting members 13. The supporting plate 11 is used to place the ultrasonic inspection equipment 2. The lower end of the lower connecting member 13 is connected to the upper end of the supporting plate 11, and the upper end of the lower connecting member 13 is rotatably connected to the lower end of the upper connecting member 12, so that during the lifting process, the influence of the shaking on the ultrasonic inspection equipment 2 can be effectively released through the relative rotation between the two, ensuring the stability of the movement of the supporting plate 11 and the ultrasonic inspection equipment 2 placed on the supporting plate 11 during the lifting process. At the same time, the upper connecting member 12 and the lower connecting member 13 can also limit the movement of the ultrasonic inspection equipment 2 in the circumferential direction, further improving the stability of the ultrasonic inspection equipment 2 in the mounting frame 10.

[0037] The hoisting mechanism 20 includes a lifting ring 21 and a cable assembly 22, wherein the lifting ring 21 is used to connect with the lifting equipment in the plant. The cable assembly 22 is connected to the mounting frame 10 and the lifting ring 21 respectively, and can automatically retract and release the cable 221, so that the lifting equipment in the plant lifts the lifting device 1 and the ultrasonic inspection equipment 2 above the spent fuel pool and then suspends them. The ultrasonic inspection equipment 2 can be lifted to the detection position only by operating the cable assembly 22 to automatically retract and release the cable 221, thereby avoiding manual operations such as replacing the lifting belt, thereby avoiding potential risks such as operating errors, personal injuries, and contamination, and improving the lifting efficiency.

[0038] In some embodiments, the mounting frame 10 further includes at least one top connecting member 14 , and the top connecting member 14 is connected to the upper connecting member 12 and the hanging mechanism 20 , respectively.

[0039] Specifically, the upper connecting member 12, the lower connecting member 13 and the top connecting member 14 are all in the shape of longitudinal rods. The number of the upper connecting member 12 and the lower connecting member 13 are both multiple, and the two are arranged one by one. The two ends of the top connecting member 14 are respectively connected to different upper connecting members 12, so that the multiple upper connecting members 12, the lower connecting members 13 and the top connecting member 14 can be interconnected to form a whole, thereby improving the accommodation coverage of the ultrasonic inspection equipment 2 and improving the stability of the mounting frame 10.

[0040] In this embodiment, the support plate 11 is rectangular, and its size is adapted to the size of the ultrasonic inspection equipment 2. The number of the upper connectors 12 and the number of the lower connectors 13 are four, and the number of the top connectors 14 is three. The four upper connectors 12 are defined as the first upper connector, the second upper connector, the third upper connector, and the fourth upper connector. The four lower connectors 13 are defined as the first lower connector, the second lower connector, the third lower connector, and the fourth lower connector. The three top connectors 14 are defined as the first top connector 141, the second top connector 142, and the third top connector 143.

[0041] In this embodiment, the lower ends of the first lower connecting member and the second lower connecting member are respectively connected to one side of the supporting plate 11, and the lower ends of the third lower connecting member and the fourth lower connecting member are respectively connected to the other side of the supporting plate 11, and the two connected sides are opposite sides to ensure stability during the lifting process. The first upper connecting member is connected to the first lower connecting member, and the remaining three upper connecting members 12 are respectively connected to the remaining three lower connecting members 13 in sequence.

[0042] The two ends of the first top connecting member 141 are respectively connected to the upper ends of the first upper connecting member and the third upper connecting member, the two ends of the second top connecting member 142 are respectively connected to the upper ends of the second upper connecting member and the fourth upper connecting member, and the two ends of the third top connecting member 143 are respectively connected to the center positions of the first top connecting member 141 and the second top connecting member 142, so as to be connected to the four upper connecting members 12 through the first top connecting member 141 and the second top connecting member 142, and the center position of the third top connecting member 143 is connected to the lifting mechanism 20.

[0043] The mounting frame 10 is arranged in such a manner that the ultrasonic inspection device 2 is accommodated in the space defined by the support plate 11, the upper connecting member 12, the lower connecting member 13 and the top connecting member 14. It should be understood that the length of the upper connecting member 12 and the lower connecting member 13 should be adapted to the height of the ultrasonic inspection device 2, and a certain flexible space should be reserved for the upper connecting member 12 and the lower connecting member 13 to rotate.

[0044] In some other optional embodiments, the lower connecting member 13 may also be respectively connected to three sides or four sides of the supporting plate 11. The number of the lower connecting member 13 and the upper connecting member 12 may also be five, six or more.

[0045] In some other optional embodiments, the lower connecting member 13 and the upper connecting member 12 can also be set to be plate-shaped, and the number thereof can be set to two, three, etc. When the number thereof is two, they can be respectively set on two opposite sides of the supporting plate 11 to ensure stability.

[0046] In some other optional embodiments, the number of the top connecting member 14 can also be set to one, and it can be set to be in a plate shape, so that the top connecting member 14 is connected to the upper ends of all the upper connecting members 12 respectively.

[0047] In some other optional embodiments, the top connector 14 may not be provided, and the same effect can be achieved by connecting the free ends of the cables 221 of the cable assembly 22 to the upper ends of the upper connectors 12 respectively.

[0048] In some other optional embodiments, the support plate 11 can also be set to various shapes such as round, polygonal, etc. In this case, the number and position of the lower connecting parts 13 are set to ensure that the support plate 11 will not tilt, flip, or become unstable during the lifting process.

[0049] In some embodiments, the mounting frame 10 further includes a plurality of reinforcing ribs 15 , and two ends of the reinforcing ribs 15 are respectively connected to two adjacent upper connecting members 12 and / or two adjacent lower connecting members 13 that rotate synchronously, so as to further improve the stability of the mounting frame 10 .

[0050] In this embodiment, there are four reinforcing ribs 15, and the two ends of the four reinforcing ribs 15 are respectively connected to the first upper connecting member and the second upper connecting member, the third upper connecting member and the fourth upper connecting member, the first lower connecting member and the second lower connecting member, and the third lower connecting member and the fourth lower connecting member in sequence, so as to improve the firmness of the upper connecting member 12 and the lower connecting member 13 while ensuring that the rotation effect between the upper connecting member 12 and the lower connecting member 13 is not affected.

[0051] It should be understood that the arrangement of the above-mentioned reinforcing rib plate 15 is the result of the arrangement based on the shape of the supporting plate 11, the connection position between the lower connecting member 13 and the supporting plate 11, and the number of upper connecting members 12 and lower connecting members 13 in this embodiment. The number and position of the arrangement will produce different arrangement methods in different embodiments due to the different arrangements of the above-mentioned premises. For example, when the four lower connecting members 13 are respectively arranged on the four different sides of the supporting plate 11, the reinforcing rib plate 15 can be arranged in an annular plate shape, and in a rectangular annular shape, with the four sides respectively connected to the four lower connecting members 13, so that the four lower connecting members 13 rotate synchronously, etc., which will not be elaborated in detail here.

[0052] In some embodiments, the mounting bracket 10 further includes a limiting assembly 16 , and the upper connecting member 12 and the lower connecting member 13 are detachably and rotatably connected via the limiting assembly 16 .

[0053] Specifically, Figure 1 As shown, the number of the limiting components 16 is multiple and corresponds to the number of the upper connecting member 12 and the lower connecting member 13, and in this embodiment, there are four. The lower end of the upper connecting member 12 and the upper end of the lower connecting member 13 are both formed with through holes for inserting the limiting components 16, and each limiting component 16 is respectively inserted into the through holes of the upper connecting member 12 and the lower connecting member 13 corresponding to the upper connecting member 12, so as to realize the detachable connection between the two, and at the same time, the limiting component 16 can be relatively rotatably arranged in the through holes, so that the upper connecting member 12 and the lower connecting member 13 can be rotated with the limiting component 16 as the rotation axis, so as to realize the rotatable connection between the two.

[0054] Read also Figure 3 In some embodiments, the limiting assembly 16 includes a main body 161, a pull ring 162, a pull rod 163, a first return spring 164, a baffle 165, a pull rope 168, at least one limiting member 166, and at least one second return spring 167. The main body 161 is hollow and includes a resisting portion 1611 and a penetrating portion 1612. The resisting portion 1611 is disposed at one end of the penetrating portion 1612 and resists against one side of one of the through holes during use to prevent it from falling off. The penetrating portion 1612 is longitudinally hollow and is used to be penetrated in two through holes to achieve the connection between the upper connecting member 12 and the lower connecting member 13.

[0055] The pull rod 163 is movably arranged in the main body 161 along the axial direction of the main body 161, and one end thereof extends out from the resisting portion 1611. The pull ring 162 is arranged at the end of the pull rod 163 that passes through the resisting portion 1611. The first reset spring 164 is sleeved on the pull rod 163 to realize the automatic reset of the pull rod 163. The baffle 165 is arranged in the main body 161 and fixed to the pull rod 163, and divides the hollow space inside the main body 161 into two parts. The first reset spring 164 is limited between the baffle 165 and the resisting portion 1611. The two ends of the pull rope 168 are respectively connected to the limiter 166 and the other end of the pull rod 163.

[0056] The end of the penetration portion 1612 away from the resisting portion 1611 is also formed with at least one connecting hole in the circumferential direction, and the stopper 166 is penetrated in the connecting hole. The number of the second return springs 167 corresponds to the number of the stoppers 166, and is used to realize the automatic reset of the stopper 166. It is sleeved on the stopper 166, and one end is fixed to the inner wall surface of the penetration portion 1612, and the other end is fixed to the stopper 166. The stopper 166 cooperates with the second return spring 167 and the pull rod 163, and is telescopically arranged on the main body 161, so as to resist the other side of the other through hole during use, and cooperate with the resisting portion 1611 to realize the connection between the upper connecting member 12 and the lower connecting member 13.

[0057] Read also Figure 4 In the actual use process, when the upper connecting member 12 needs to be connected with the lower connecting member 13, it is only necessary to align the through holes of the two and pull the pull ring 162 to drive the pull rod 163 to move axially along the main body 161, and then drive the pull rope 168 to pull the limit member 166 along the connecting hole to the internal space of the through-set portion 1612 to shrink. At this time, the first return spring 164 and the second return spring 167 are both compressed.

[0058] Furthermore, the penetration portion 1612 is penetrated in the through holes of the upper connecting member 12 and the lower connecting member 13, and the pull ring 162 is released. Since the first return spring 164 and the second return spring 167 are compressed, after the pull ring 162 is released, the first return spring 164 and the second return spring 167 automatically extend to the original state, thereby driving the limiter 166 to extend outward along the connecting hole, and the pull rod 163 and the pull ring 162 are also reset.

[0059] At this time, the stopper 166 and the stopper 1611 are respectively lower than the two sides of the two through holes, thereby realizing the detachable connection between the upper connecting member 12 and the lower connecting member 13. When disassembly is required, it is only necessary to pull the pull ring 162 to pull the stopper assembly 16 out of the two through holes, which is easy to operate and can improve installation efficiency.

[0060] It should be understood that since the upper connecting member 12 and the lower connecting member 13 need to be rotatably connected, the through holes of both are circular, the limiting assembly 16 is also cylindrical, and the diameter of the blocking portion 1611 is larger than the aperture of the through hole, and the diameter of the penetration portion 1612 is smaller than the aperture of the through hole.

[0061] In this embodiment, there are three stoppers 166 , which are evenly spaced apart on the circumference of the penetration portion 1612 .

[0062] In some other optional embodiments, the upper connecting member 12 and the lower connecting member 13 can be detachably connected by inserting connecting members such as bolts and connecting ropes, and can also be rotatably connected using the connecting members as rotating shafts.

[0063] In some embodiments, the lower connecting member 13 and the supporting plate 11 can be fixed by welding, or can be detachably connected by bolt connection or connection with a limit assembly 16. The connection method between the upper connecting member 12 and the top connecting member 14 can also be selected from various connection methods such as welding and bolt connection, which are not specifically limited here.

[0064] It should be understood that the ultrasonic inspection equipment 2 can also be detachably connected to the support plate 11 and / or the lower connecting member 13 by means of bolt connection or the like, so as to further improve the stability of the mounting frame 10 in accommodating the ultrasonic inspection equipment 2, which is not specifically limited here.

[0065] In some embodiments, the mounting frame 10 is made of stainless steel and soft rubber, and the soft rubber is arranged on the side of the mounting frame 10 close to the ultrasonic inspection equipment 2 to prevent the ultrasonic inspection equipment 2 from touching and causing damage to the mounting frame 10 during lifting.

[0066] In some embodiments, the material of the limiting component 16 includes stainless steel, and the material of the pull rope 168 includes stainless steel wire, so as to improve its performance.

[0067] like Figure 5As shown, in some embodiments, the cable assembly 22 includes a cable recovery tray 222, a rotating shaft 223 and a motor 224 in addition to the cable 221. The cable 221 is wound around the cable recovery tray 222 for connection with the lifting ring 21 or the mounting frame 10. The cable recovery tray 222 is coaxially arranged with the rotating shaft 223, and the cable recovery tray 222 is driven to rotate by the rotation of the rotating shaft 223, thereby realizing the retraction and release of the cable 221. The rotating shaft 223 rotates synchronously with the output shaft of the motor 224 through the transmission structure, and then the rotation of the rotating shaft 223 is realized by controlling the motor 224. The free ends of the cable recovery tray 222 and the cable 221 are respectively connected to the lifting ring 21 and the mounting frame 10.

[0068] In this embodiment, the rotating shaft 223 and the output shaft of the motor 224 rotate synchronously via a transmission belt.

[0069] In some other optional embodiments, the rotating shaft 223 and the output shaft of the motor 224 can also be transmitted through a chain or gear structure.

[0070] In some embodiments, the cable assembly 22 further includes a substrate 225 , the cable recovery tray 222 is rotatably mounted on the substrate 225 , and the motor 224 is also mounted on the substrate 225 .

[0071] In this embodiment, the base plate 225 is connected to the suspension ring 21 via a rope, and the free end of the cable 221 is connected to the top connector 14 of the mounting frame 10 .

[0072] In some other optional embodiments, the free end of the cable 221 may also be connected to the hanging ring 21, and the base plate 225 and the top connecting member 14 of the mounting frame 10 are connected by a rope.

[0073] like Figure 6 As shown, in some embodiments, the lifting mechanism 20 further includes a connecting member 23 , two ends of which are respectively fixed to the free end of the cable 221 and the mounting frame 10 .

[0074] In some embodiments, the cable 221 is made of stainless steel wire, and the cable assembly 22 is also made of stainless steel to ensure that it has sufficient load-bearing capacity.

[0075] Specifically, the connector 23 includes a body 231, a buckle 232, a connecting ring 233 and a fixing bolt 234. The body 231 is hollow and includes an upper cover and a cylinder. The cylinder is open at one end and closed at the other end. A through hole is formed on the upper cover along the thickness direction. The free end of the cable 221 is inserted into the through hole and fixed to the end by the buckle 232 to form an annular structure, and is inserted into the connecting ring 233 so that the annular structure at the end is relatively fixed to the connecting ring 233. The connecting ring 233 is fixed on the fixing bolt 234. The fixing bolt 234 can be fixed to the body 231 by welding, bolt connection, etc.

[0076] During specific use, after the free end of the cable 221 is fixed to the buckle 232, the connecting ring 233 and the fixing bolt 234, the main body 231 is closed by welding the upper cover to the open end of the cylinder, so that the free end of the cable 221 is fixed in the connecting piece 23 to prevent the two from falling off from each other during use.

[0077] In some other optional embodiments, the free end of the cable 221 may also be fixed to the connector 23 by casting, welding, or the like.

[0078] For example Figure 1 As shown, in this embodiment, the connecting member 23 and the third top connecting member 143 are connected by three bolts.

[0079] In some other optional embodiments, the connecting member 23 and the top connecting member 14 may be connected to each other by welding or other methods.

[0080] In some embodiments, the lifting device 1 for ultrasonic inspection equipment of nuclear power plant fuel assemblies also includes a video mechanism 30, which is installed on the mounting frame 10 or the lifting mechanism 20, and is used to monitor the lifting position of the lifting device 1 in real time during the lifting process to ensure that the ultrasonic inspection equipment 2 is lifted to the detection position.

[0081] Specifically, the video mechanism 30 includes a video terminal 31 and a lighting component 32 , both of which are fixed to the mounting frame 10 or the hanging mechanism 20 via a fastening structure 33 .

[0082] In this embodiment, the fastening structure 33 is a clamp, which fixes the video terminal 31 and the lighting component 32 on the connecting member 23 .

[0083] In some other optional embodiments, the video terminal 31 and the lighting component 32 may be fixed to the hanging mechanism 20 or the mounting frame 10 by welding, bolting, or the like.

[0084] It should be understood that the video terminal 31 and the lighting component 32 are both waterproof and radiation-proof, and in some embodiments, the video terminal 31 is a video terminal with a wide-angle effect to increase the monitoring coverage area.

[0085] In some embodiments, the nuclear power plant fuel assembly ultrasonic inspection equipment lifting device 1 also includes a control mechanism 40, which is electrically connected to the cable assembly 22, specifically, electrically connected to the motor 224, and controls the retraction and extension of the cable 221 by controlling the motor 224.

[0086] In some other optional embodiments, the control mechanism 40 may also be electrically connected to the cable assembly 22 and the ultrasonic inspection equipment 2 respectively, so as to achieve dual control of lifting and ultrasonic inspection.

[0087] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. A lifting device for ultrasonic inspection equipment of nuclear power plant fuel assembly, characterized in that: include: A mounting frame (10) for placing an ultrasonic inspection device (2), comprising a supporting plate (11) and at least two upper connecting members (12) and at least two lower connecting members (13), wherein the lower end of the lower connecting member (13) is connected to the supporting plate (11), and the upper end is rotatably connected to the lower end of the upper connecting member (12); as well as A lifting mechanism (20), the lifting mechanism (20) comprising a lifting ring (21) for connecting to a lifting device and a cable assembly (22) for automatically retracting and releasing a cable (221), the cable assembly (22) being connected to the mounting frame (10) and the lifting ring (21) respectively.

2. The lifting device for ultrasonic inspection equipment of nuclear power plant fuel assembly according to claim 1, characterized in that: The mounting frame (10) further comprises at least one top connecting member (14), wherein the top connecting member (14) is respectively connected to the upper connecting member (12) and the hoisting mechanism (20).

3. The lifting device for ultrasonic inspection equipment of nuclear power plant fuel assembly according to claim 2, characterized in that: The upper connecting piece (12), the lower connecting piece (13) and the top connecting piece (14) are all in the shape of longitudinal rods. The upper connecting piece (12) and the lower connecting piece (13) are both multiple in number and are arranged in one-to-one correspondence. The two ends of the top connecting piece (14) are respectively connected to different upper connecting pieces (12).

4. The lifting device for ultrasonic inspection equipment of nuclear power plant fuel assembly according to claim 3, characterized in that: The mounting frame (10) further comprises a plurality of reinforcing rib plates (15), both ends of which are respectively connected to two adjacent upper connecting members (12) and / or two adjacent lower connecting members (13) that rotate synchronously.

5. The lifting device for ultrasonic inspection equipment of nuclear power plant fuel assembly according to claim 1, characterized in that: The mounting frame (10) further comprises a cylindrical limiting assembly (16), the lower end of the upper connecting member (12) and the upper end of the lower connecting member (13) both form circular through holes, and the limiting assembly (16) is respectively inserted into the through holes of the upper connecting member (12) and the corresponding lower connecting member (13).

6. The lifting device for ultrasonic inspection equipment of nuclear power plant fuel assembly according to claim 5, characterized in that: The limiting assembly (16) comprises a main body (161), a pull ring (162), a pull rod (163), a first return spring (164), a baffle (165), a pull rope (168), at least one limiting member (166) and at least one second return spring (167). The main body (161) is in the shape of a longitudinal hollow cylinder and comprises a longitudinal through-hole portion (1612) and a stop portion (1611) arranged at one end of the through-hole portion (1612). The pull rod (163) is movably arranged in the main body (161) along the axial direction. 1), and one end thereof extends out from the resisting portion (1611), the pull ring (162) is arranged at the end extending out of the pull rod (163), the baffle (165) is located in the main body (161) and is fixed to the pull rod (163), the first return spring (164) is sleeved on the pull rod (163), and is arranged between the baffle (165) and the pull ring (162), and the two ends of the pull rope (168) are respectively connected to the limit member (166) and the other end of the pull rod (163); At least one connecting hole is formed along the circumferential direction at one end of the penetration portion (1612) away from the blocking portion (1611), and the limiting member (166) is penetrated in the connecting hole. The second return spring (167) is sleeved on the limiting member (166), and the two ends are respectively connected to the inner wall surface of the penetration portion (1612) and the limiting member (166).

7. The lifting device for ultrasonic inspection equipment of nuclear power plant fuel assembly according to claim 1, characterized in that: The cable assembly (22) comprises a cable recovery disk (222), a rotating shaft (223) and a motor (224); the rotating shaft (223) and an output shaft of the motor (224) rotate synchronously via a transmission structure; the rotating shaft (223) and the cable recovery disk (222) are coaxially arranged; the cable (221) is wound around the cable recovery disk (222); and the free ends of the cable recovery disk (222) and the cable (221) are respectively connected to the suspension ring (21) and the mounting frame (10).

8. The lifting device for ultrasonic inspection equipment of nuclear power plant fuel assembly according to claim 7, characterized in that: The lifting mechanism (20) further comprises a connecting member (23), wherein the connecting member (23) is respectively fixed to a free end of the cable (221) and the mounting frame (10); The connecting member (23) comprises a buckle (232), a connecting ring (233), a fixing bolt (234) and a hollow body (231); the free end of the cable (221) is inserted into the body (231), passes through the connecting ring (233) and is fixed to itself through the buckle (232) to form an annular structure; the connecting ring (233) is fixed on the fixing bolt (234), and the fixing bolt (234) is fixed in the body (231).

9. The lifting device for ultrasonic inspection equipment of nuclear power plant fuel assembly according to claim 1, characterized in that: It also includes a video mechanism (30), which includes a video terminal (31) and a lighting component (32), and is fixed to the mounting frame (10) or the hanging mechanism (20) via a fastening structure (33).

10. The lifting device for ultrasonic inspection equipment of nuclear power plant fuel assembly according to claim 1, characterized in that: It also includes a control mechanism (40), wherein the control mechanism (40) is electrically connected to the cable assembly (22); or the control mechanism (40) is electrically connected to the cable assembly (22) and the ultrasonic inspection device (2).

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