Lifting device for out-of-pile nuclear detector assembly

Abstract

The utility model relates to the technical field of nuclear power stations, in particular to an ex-core nuclear detector assembly lifting device which comprises a support, a fixing mechanism, a loading plate, a driving mechanism, a lifting mechanism and a steel wire rope. Sliding rails are arranged on the two sides in the support. The loading plate is arranged at the bottom of the bracket; the driving mechanism is arranged in the middle outside the bracket and comprises a bidirectional self-locking winch, a fixed support, a gear transmission structure and a handle; the lifting mechanism is arranged on the loading plate and comprises a lifting supporting plate, a three-jaw chuck, a roller, a clamping block and a fixing clamp. The steel wire rope is arranged on the two-way self-locking winch, bypasses the fixed pulley and is connected with the clamping block, the steel wire rope is driven by the driving mechanism to be wound and unwound, and lifting of the lifting mechanism is controlled. The structure that the lifting supporting plate is controlled by the steel wire rope is adopted, so that the out-of-pile detector assembly can ascend and descend at any time, and butt joint and disassembly and assembly are facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nuclear power plants, in particular to a kind of ex-core nuclear detector assembly lifting device. BACKGROUND

[0002] Ex-core nuclear measurement system is one of important safety level systems of nuclear power plant, mainly through the ex-core detector installed in nuclear reactor pressure vessel continuously "monitoring" the change of neutron fluence rate and power level in reactor, plays a vital role for the safe operation and maintenance of nuclear power plant.

[0003] Ex-core nuclear instrument detector assembly is installed by sectional, shaft jacking mode, first the probe integrated cable is laid through the center hole of insulating ceramic block steel plate into corresponding electrical buried pipe, and the cable laid into electrical buried pipe is pumped during the process of probe instrument jacking, two through holes at the bottom of shaft are used to install temporary support tooling to support the probe assembly that has entered the shaft, and the bolt connection of adjacent assembly is carried out;In this way, until the last support base assembly is installed, the direction of assembly is fine-tuned, the through hole at the bottom is aligned with the two through holes at the bottom of shaft, the positioning pin is inserted, and the locking pin is installed.

[0004] Because ex-core detector assembly has multi-section structure, has certain weight, and shaft position is close to reactor core, radiation dose is high, in addition, during the process of probe instrument jacking, bolt connection is used between each assembly, and ex-core detector installation tool is needed for transportation, support and installation;The long time of disassembly and assembly is directly related to the health of operating personnel, limited by the special working environment and installation space outside the reactor of nuclear power plant, the shape specification of installation tool also needs to meet the related shaft size requirements during installation, manual operation saves time and effort, ex-core detector lifting has high stability, traditional installation tool and device cannot meet the above requirements. SUMMARY

[0005] The present application provides an ex-core nuclear detector assembly lifting device, which is labor-saving, simple and light, and has good lifting stability and safety.

[0006] In order to achieve the above object, the application provides a kind of out-of-pile nuclear detector assembly lifting device, including support, fixed mechanism, loading plate, drive mechanism, lifting mechanism and steel wire rope, wherein: fixed mechanism is arranged at the top of support, including fixed pulley and concave limit board;Two sides in the inside of support are provided with slide rail;Loading plate is arranged at the bottom of support, and is connected with support by diagonal pull rod;Drive mechanism is arranged at the middle position outside support, including bidirectional self-locking winch, fixed support, gear transmission structure and handle, bidirectional self-locking winch is connected with support by fixed support, handle is connected with gear transmission structure by connecting rod, and gear transmission structure is connected with bidirectional self-locking winch;Lifting mechanism is arranged on loading plate, including lifting tray, three-jaw chuck, roller, clamping block and fixed clamp, lifting tray is arranged on loading plate, three-jaw chuck is arranged at the front end of lifting tray, fixed clamp is arranged at the rear end of lifting tray, fixed clamp is connected with roller by screw rod, roller is arranged on slide rail, and clamping block is arranged at the rear end of lifting tray, and is arranged opposite to fixed pulley;Steel wire rope is arranged on bidirectional self-locking winch, and passes through fixed pulley, and is connected with clamping block, and the control of lifting mechanism lifting is realized by driving mechanism driving the retraction of steel wire rope.

[0007] Further, it also includes anti-toppling hinge, and the anti-toppling hinge is arranged on the support through the fixing ring.

[0008] Further, the gear transmission mechanism includes first gear, second gear, baffle plate frame and bird baffle plate, wherein: the baffle plate frame is arranged on the fixed support;The first gear and the second gear are installed side by side on one side in the inside of the baffle plate frame, and are engaged with each other;The bidirectional self-locking winch is installed on the other side in the inside of the baffle plate frame;The first gear is connected with the baffle plate frame through the input transmission shaft, and the handle is connected with the input transmission shaft through the connecting rod;The second gear is coaxially arranged with the bidirectional self-locking winch, and is connected with the baffle plate frame through the output transmission shaft;The bird baffle plate is located on the inside of the baffle plate frame and is arranged on the side surface of the first gear and the second gear.

[0009] Further, the bottom of the three-jaw chuck and the lifting tray are provided with a ball and a rotating cavity for 360° rotation.

[0010] Further, the inside of the three-jaw chuck is provided with a cable slot for placing armored cable.

[0011] Further, the outside of the bottom of the support is provided with a walking mechanism foot wheel.

[0012] Further, the middle position of the two sides outside the support is provided with a handrail.

[0013] Further, when the out-of-pile detector assembly is installed, the concave limit board is tightly attached to the shaft wall of the reactor, and forms an arc clamping with the shaft wall.

[0014] The present application provides an off-core nuclear detector assembly lifting device with the following beneficial effects:

[0015] 1. This application adopts a structure in which a wire rope is used to control the lifting and lowering of the support plate, so that the off-core detector assembly can be raised and lowered at any time, which is convenient for docking and disassembly. In addition, the bidirectional wire winch has a self-locking function, which can prevent the off-core detector from falling during the lifting process, making it convenient for operators to operate flexibly and ensuring the safety of the off-core detector assembly and disassembly.

[0016] 2. A three-jaw detector limit chuck with a 360° rotation function is used. During the jacking and installation process of the off-core detector, the direction of the off-core detector's pin limit hole can be adjusted at any time according to the actual position of the two through holes at the bottom of the shaft, thereby improving installation efficiency.

[0017] 3. Wire duct holes for armored cables are reserved to ensure that the armored cables do not need to be bent when extending to the outside of the loading plate, thereby improving the safety of off-core detection installation. Handrails and anti-tilt hinges are also provided to facilitate safe auxiliary control during the disassembly and assembly of off-core nuclear detector components, further improving the stability of disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings that constitute part of this application are used to provide a further understanding of this application and make other features, objects and advantages of this application more apparent. The illustrative embodiment drawings of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application. In the drawings:

[0019] Figure 1 This is a schematic structural diagram of a lifting device for an ex-core nuclear detector assembly according to an embodiment of the present application;

[0020] Figure 2 This is a side view of a lifting device for an ex-core nuclear detector assembly provided according to an embodiment of the present application;

[0021] Figure 3 This is a front view of the lifting device for the ex-core nuclear detector assembly provided in accordance with an embodiment of the present application;

[0022] Figure 4 is a schematic structural diagram of a driving mechanism provided according to an embodiment of the present application;

[0023] In the figure: 1- bracket, 2- loading plate, 3- steel wire rope, 4- fixed pulley, 5- concave limit plate, 6- slide rail, 7- two-way self-locking winch, 8- fixed support, 9- handle, 10- lifting support plate, 11- three-jaw chuck, 12- roller, 13- clamping block, 14- fixing fixture, 15- anti-dumping hinge, 16- fixing ring, 17- first gear, 18- second gear, 19- disc holder, 20- bird deflector, 21- walking mechanism caster, 22- handrail. DETAILED DESCRIPTION

[0024] In order to better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present application.

[0025] It should be noted that the terms "first", "second", and the like in the description and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units does not necessarily limit to those clearly listed steps or units, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0026] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0027] In addition, in addition to indicating the orientation or positional relationship, the above-mentioned part of the terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0028] In addition, the meaning of the term "a plurality of" should be two and more than two.

[0029] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0030] As Figures 1-3As shown, the application provides a kind of out-of-pile nuclear detector assembly lifting device, including support 1, fixed mechanism, loading plate 2, drive mechanism, lifting mechanism and steel wire rope 3, wherein: fixed mechanism is arranged at the top of support 1, including fixed pulley 4 and concave limit plate 5;Two sides in the inside of support 1 are provided with slide rail 6;Loading plate 2 is arranged at the bottom of support 1, and is connected with support 1 by inclined pull rod;Drive mechanism is arranged at the middle position outside support 1, including bidirectional self-locking winch 7, fixed support 8, gear transmission structure and handle 9, bidirectional self-locking winch 7 is connected with support 1 by fixed support 8, handle 9 is connected with gear transmission structure by connecting rod, and gear transmission structure is connected with bidirectional self-locking winch 7;Lifting mechanism is arranged on loading plate 2, including lifting support plate 10, three-jaw chuck 11, roller 12, clamping block 13 and fixed clamp 14, lifting support plate 10 is arranged on loading plate 2, three-jaw chuck 11 is arranged at the front end of lifting support plate 10, fixed clamp 14 is arranged at the rear end of lifting support plate 10, fixed clamp 14 is connected with roller 12 by screw rod, roller 12 is arranged on slide rail 6, clamping block 13 is arranged at the rear end of lifting support plate 10, and is arranged opposite to fixed pulley 4;Steel wire rope 3 is arranged on bidirectional self-locking winch 7, and passes through fixed pulley 4, and is connected with clamping block 13, and the retraction of steel wire rope 3 is driven by drive mechanism, to realize the control of lifting mechanism lifting.

[0031] Specifically, the out-of-pile nuclear detector assembly lifting device provided by the embodiment of the application is mainly used for assisting the transportation, support and installation of the out-of-pile nuclear detector assembly, so that the out-of-pile nuclear detector assembly can smoothly rise into the vertical shaft to realize detection. The support 1 is used for fixed support of the overall structure, and the length is determined according to the length of the actual detector. The slide rails 6 are arranged on the inner sides of the support 1, and are used for up-down movement of the lifting mechanism. The fixed mechanism is arranged at the top of the support 1, and is composed of the fixed pulley 4 and the concave limit plate 5. The fixed pulley 4 penetrates the steel wire rope 3, cooperates with the drive mechanism to realize lifting of the lifting mechanism, and the concave limit plate 5 is used for limiting the position of the out-of-pile nuclear detector rising, so that the out-of-pile nuclear detector can always be aligned with the vertical shaft hole. The loading plate 2 is arranged at the bottom of the support 1, and plays a role of fixed support. The drive mechanism adopts gear transmission cooperated with the driving structure of the steel wire rope 3. By rotating the handle 9, the rotation of the bidirectional self-locking winch 7 is realized, the retraction of the steel wire rope 3 on the bidirectional self-locking winch 7 is controlled, and the overall lifting control of the lifting mechanism is realized. The lifting mechanism is in the form of sliding. The out-of-pile nuclear detector assembly is fixed on the lifting support plate 10 by the three-jaw chuck 11. Under the action of the drive mechanism and the steel wire rope 3, the lifting support plate 10 as a whole slides up and down on the slide rail 6 of the support 1 by the roller 12, and the overall lifting of the out-of-pile nuclear detector is realized.

[0032] More specifically, in the embodiment of the present application, the lifting mechanism as a whole is in the form of sliding cooperation with the steel wire rope 3 to pull, wherein the lifting plate 10 is mainly used for placing the ex-core nuclear detector assembly; the three-jaw chuck 11 is used for fixing the ex-core nuclear detector, so that it can be stably placed on the lifting plate 10; the fixed clamps 14 are arranged on both sides of the rear end of the lifting plate 10, the fixed clamps 14 are connected with the rollers 12 through screw rods, so that the rollers 12 can be fixed on the lifting plate 10 and conveniently rotated; the clamping blocks 13 are arranged in the middle of the rear end of the lifting plate 10 and are oppositely arranged with the fixed pulleys 4 above, and are used for fixing the steel wire rope 3, so that the steel wire rope 3 always remains in the middle of the support 1, thereby ensuring the stability of the movement of the lifting plate 10; the rollers 12 are arranged on the sliding rails 6 as a whole, and under the driving of the steel wire rope 3, the lifting plate 10 as a whole slides along the sliding rails 6 to be lifted, in order to ensure the smoothness of the sliding, preferably, the rollers 12 are internally provided with the ball bearings, the ball bearings are filled in the gap between the rollers 12 and the sliding rails 6, the rollers 12 are rollingly matched with the lateral side walls of the grooves of the sliding rails 6, the rollers 12 are precisely guided by the left and right side walls of the grooves of the sliding rails 6, the stability of the guidance can be improved, meanwhile, the contact area between the ball bearings and the side walls is small, the generated damping is small, and the smoothness of the overall lifting can be ensured.

[0033] Further, the anti-toppling hinge 15 is arranged on the support 1 through the fixing ring 16. The anti-toppling hinge 15 is arranged at an upper position in the middle of the support 1, and the two ends of the hinge are respectively connected with the fixing rings 16 on the two sides of the support 1, so that the ex-core nuclear detector is prevented from toppling outward during the lifting of the ex-core nuclear detector, and the auxiliary fixing effect is achieved.

[0034] Further, as shown in Figure 4 the gear transmission mechanism includes the first gear 17, the second gear 18, the disc rack 19 and the bird baffle 20, wherein: the disc rack 19 is arranged on the fixed support 8; the first gear 17 and the second gear 18 are installed side by side on one side in the inside of the disc rack 19 and are in mesh with each other; the bidirectional self-locking winch 7 is installed on the other side in the inside of the disc rack 19; the first gear 17 is connected with the disc rack 19 through the input transmission shaft, and the handle 9 is connected with the input transmission shaft through the connecting rod; the second gear 18 is coaxially arranged with the bidirectional self-locking winch 7 and is connected with the disc rack 19 through the output transmission shaft; the bird baffle 20 is located on the inside of the disc rack 19 and is arranged on the side surface of the first gear 17 and the second gear 18.

[0035] Specifically, the driving mechanism uses gear transmission to control the retraction and extension of the wire rope 3, and the whole is set on the bracket 1 through a fixed support 8; large and small gears are set inside the baffle frame 19 for meshing transmission, wherein the small gear is input and the large gear is output, and the input transmission shaft is controlled by the handle 9 to rotate the small gear, driving the large gear to rotate, driving the output transmission shaft, so that the two-way self-locking winch 7 coaxially connected thereto will rotate, and the wire rope 3 wound thereon will move, thereby driving the lifting mechanism as a whole to move; the two-way self-locking winch 7 is wound with a wire rope 3, and the retraction and extension of the wire rope 3 can be controlled by its rotation direction. A self-locking structure is provided on the winch, which can prevent the extra-core nuclear detector from suddenly falling during the jacking process; the bird guard 20 is independently installed on the side of the large gear and the small gear to prevent the detector from falling due to sudden rotation of the gear, thereby improving the safety of the installation.

[0036] Furthermore, a ball bearing and a rotating cavity are provided between the bottom of the three-jaw chuck 11 and the lifting support plate 10, allowing for 360-degree rotation. The three-jaw chuck 11 is used to secure the ex-core nuclear detector assembly and has a 360-degree rotation function, making it easy to adjust the orientation of the ex-core nuclear detector assembly during the lifting process.

[0037] Furthermore, a cable trough hole is provided inside the three-jaw chuck 11 for placing the armored cable. The cable trough hole is provided inside the three-jaw chuck 11 for connecting the armored cable of the fixed out-of-core nuclear detector to prevent the armored cable from bending during installation.

[0038] Furthermore, a walking mechanism caster 21 is provided on the outside of the bottom of the bracket 1. The walking mechanism caster 21 has the functions of self-locking and universal rotation, so that the device as a whole can be flexibly moved and is easy to transport.

[0039] Furthermore, armrests 22 are provided at the middle positions on both sides of the outside of the bracket 1. The provision of the armrests 22 facilitates the disassembly, assembly and transportation of the entire device.

[0040] Furthermore, when installing the off-core detector assembly, the concave stopper plate 5 abuts against the reactor shaft wall, forming an arc-shaped engagement therewith. The stopper plate at the top of the bracket 1 is configured as a concave structure. During installation, the concave stopper plate 5 abuts against the shaft wall, ensuring that the off-core detector and the bottom lifting support plate 10 are always vertically aligned with the shaft channel during the lifting process, preventing the entire lifting device from shifting. This also prevents collision between the off-core nuclear detector assembly and the shaft wall, improving installation accuracy and stability.

[0041] The above descriptions are only the preferred embodiments of the present application, and are not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An ex core nuclear detector assembly hoist characterized by, Including support, fixed mechanism, loading plate, drive mechanism, lifting mechanism and steel wire rope, wherein: The fixed mechanism is arranged at the top of the support and comprises a fixed pulley and a concave limiting plate; Both sides inside the support are provided with slide rails; The loading plate is arranged at the bottom of the support and is connected with the support through a diagonal pull rod; The drive mechanism is arranged at the middle position outside the support and comprises a bidirectional self-locking winch, a fixed support, a gear transmission structure and a handle, the bidirectional self-locking winch is connected with the support through the fixed support, the handle is connected with the gear transmission structure through a connecting rod, and the gear transmission structure is connected with the bidirectional self-locking winch; The lifting mechanism is arranged on the loading plate and comprises a lifting supporting plate, a three-jaw chuck, a roller, a clamping block and a fixed clamp, the lifting supporting plate is arranged on the loading plate, the three-jaw chuck is arranged at the front end of the lifting supporting plate, the fixed clamp is arranged at the rear end of the lifting supporting plate, the fixed clamp is connected with the roller through a screw rod, the roller is arranged on the slide rail, and the clamping block is arranged at the rear end of the lifting supporting plate and is arranged opposite to the fixed pulley; The steel wire rope is arranged on the bidirectional self-locking winch, passes through the fixed pulley and is connected with the clamping block, the drive mechanism drives the winding and unwinding of the steel wire rope, so that the lifting of the lifting mechanism is controlled.

2. The ex-core nuclear probe assembly hoist apparatus of claim 1, wherein, A anti-toppling hinge is further arranged on the support through a fixed ring.

3. The ex core nuclear probe assembly hoist of claim 2, wherein, The gear transmission structure comprises a first gear, a second gear, a baffle rack and a bird baffle plate, wherein: The baffle rack is arranged on the fixed support; The first gear and the second gear are installed side by side on one side inside the baffle rack and are engaged with each other; The bidirectional self-locking winch is installed on the other side inside the baffle rack; The first gear is connected with the baffle rack through an input transmission shaft, and the handle is connected with the input transmission shaft through a connecting rod; The second gear is coaxially arranged with the bidirectional self-locking winch and is connected with the baffle rack through an output transmission shaft; The bird baffle plate is located on the inner side of the baffle rack and is arranged on the side surface of the first gear and the second gear.

4. The ex core nuclear probe assembly hoist of claim 3, wherein, A ball and a rotating cavity are arranged between the bottom of the three-jaw chuck and the lifting supporting plate for 360° rotation.

5. The ex core nuclear probe assembly hoist of claim 4, wherein, A cable slot is arranged in the three-jaw chuck for placing armored cable.

6. The ex situ nuclear fuel assembly probe assembly lift of claim 5, wherein, A walking mechanism caster is arranged on the outer side of the bottom of the support.

7. The ex situ nuclear fuel assembly lift device of claim 6, wherein, A handrail is arranged at the middle position of both sides outside the support.

8. The ex core nuclear probe assembly hoist of claim 7, wherein, When installing the ex-core detector assembly, the concave limiting plate is tightly attached to the shaft wall of the reactor and forms a circular arc clamping with the shaft wall. When installing the ex-core detector assembly, the concave limiting plate is tightly attached to the shaft wall of the reactor and forms a circular arc clamping with the shaft wall.

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