A transport tool for reactor take-over flange protection device

Abstract

The present invention belongs to the technical field of nuclear power plant reactor maintenance, and specifically relates to a transportation tool for a reactor take-over flange protection device. According to the structural characteristics of the take-over flange protection device and the problem of difficulty in transporting the protection device, a take-over flange protection device transportation tool is developed to fill the gap of lack of special tools for this work, realize the cooperation of two workers in transporting the protection device, reduce the labor intensity of the workers, and improve the safety and work efficiency of the protection device transportation work.

Description

Technical Field

[0001] The present application belongs to the technical field of nuclear power plant reactor maintenance, and specifically relates to a transportation tool for a reactor take-over flange protection device. Background Art

[0002] During the overhaul of refueling and dismantling of the unit, the protective device of the reactor take-over flange needs to be removed with special tools and hoisted to the radiation contaminated site of the reactor hall for temporary storage, so as to create the prerequisite for the subsequent unsealing of the take-over flange of the neutron temperature measurement channel and the reserved take-over flange of the drive mechanism. However, during the overhaul, a large number of maintenance tools and consumables need to be stored in the reactor maintenance radiation contaminated site, and the staff need to carry out various maintenance activities in the site, and they often encounter the protective device. Because the overall center of gravity of the protective device is biased upward, and the diameter of the part in contact with the ground is small, there is a "top-heavy" problem, and it is very easy to tip over. Therefore, during each overhaul, the disassembled protective device except the reactor take-over flange needs to be transported to a special storage location for storage.

[0003] Due to the limitations of on-site conditions, cranes cannot be used to lift the protective devices except for the reactor takeover flange to a dedicated storage location, and they can only be transported by manpower. In the absence of special transportation tools, staff generally resort to manual transportation. However, there is no suitable gripping position on the protective device, so it can only be carried by one person. The protective device is easy to slip out of the hands during transportation, making transportation difficult. At the same time, a single protective device is heavy, which places a great burden on the transportation personnel and poses a great industrial safety risk. In addition, there are many pipes, valves and other equipment arranged along the ground between the on-site reactor maintenance radiation contaminated site and the dedicated storage area for the protective device. The transportation personnel need to carry the protective device across the equipment, which poses a great risk of equipment damage and economic loss. Summary of the invention

[0004] The purpose of the present application is to provide a means of transporting a reactor take-over flange protection device, so as to solve the problem that the protection device can only be carried by manpower and is easy to fall out of the hands, is difficult to transport, and has a great industrial safety risk.

[0005] Technical solution to achieve the purpose of this application:

[0006] The embodiment of the present application provides a transport tool for a reactor nozzle flange protection device, the transport tool comprising: a load-bearing cylinder and a load-bearing handle;

[0007] The outer diameter of the load-bearing cylinder is smaller than the inner diameter of the surrounding cylinder of the head of the protection device and is larger than the distance from the tail end of the hanging pin on the protection device to the center of the protection device;

[0008] An L-shaped keyway is provided on the outer surface of the load-bearing cylinder, and the width of the L-shaped keyway is greater than the diameter of the hanging pin;

[0009] One side of the L-shaped keyway is provided with an opening at the lower end of the load-bearing cylinder, and the other side of the L-shaped keyway is provided perpendicular to the one side of the L-shaped keyway, so that the hanging pin enters from the opening of one side of the L-shaped keyway and slides to the other side of the L-shaped keyway;

[0010] The load-bearing handle is connected to the upper end of the load-bearing cylinder through a load-bearing rod and is used to lift the load-bearing cylinder.

[0011] Optional,

[0012] One side opening of the L-shaped keyway is trumpet-shaped.

[0013] Optionally, there are two load-bearing rods, the lower ends of the two load-bearing rods are symmetrically fixed to the outer surface of the load-bearing cylinder, and the upper ends of the two load-bearing rods are fixed to the load-bearing handles.

[0014] The distance from the lower end of the load-bearing rod to the L-shaped keyway is greater than the distance from the hanging pin to the upper end of the protective device.

[0015] Optional,

[0016] The lower end of the load-bearing rod is aligned with the end of the other side of the L-shaped keyway.

[0017] Optional,

[0018] The load-bearing handle is a long rod structure, and the length of the load-bearing handle is greater than the distance between the two load-bearing rods.

[0019] Optional,

[0020] The load-bearing rod is a hollow structure;

[0021] And / or, the load-bearing handle is a hollow structure.

[0022] Optional,

[0023] The interior of the load-bearing cylinder is a hollow structure.

[0024] Optionally, the transport vehicle further comprises: an anti-slip assembly; the anti-slip assembly comprises a vertical slide groove opened inside the load-bearing cylinder, the lower end of the slide groove is connected to the L-shaped key groove;

[0025] The anti-drop assembly further includes: a stopper;

[0026] The stopper is arranged in the slide groove. When the stopper is located at the lower end of the slide groove, the stopper protrudes from the L-shaped key groove; when the stopper is located at the upper end of the slide groove, the stopper is hidden on the inner side of the load-bearing cylinder.

[0027] Optional,

[0028] The height of the stopper is greater than the width of the L-shaped keyway.

[0029] Optionally, the anti-slip assembly further includes: a lifting rod;

[0030] The lifting rod is used to lift and lower the stopper.

[0031] Optionally, the number of the slide grooves is two, the two slide grooves are symmetrically arranged, and each slide groove is provided with a stopper; the lifting rod comprises: a connecting rod, a transmission rod and a lifting handle;

[0032] The connecting rod is fixedly connected to the two stoppers;

[0033] One end of the transmission rod is fixed to the connecting rod, and the other end of the transmission rod extends out of the interior of the load-bearing cylinder;

[0034] The lifting handle is mounted on the other end of the transmission rod.

[0035] Optional,

[0036] The load-bearing handle is provided with a through hole for passing the other end of the transmission rod.

[0037] Optionally, the transmission rod is divided into a lower half section, a middle section and an upper half section;

[0038] The lower half is located at the lower side of the load-bearing handle and is fixed to the connecting rod;

[0039] The upper section extends out from the load-bearing handle; the middle section is provided with a spring on its outer sleeve, and the spring is located at the lower side of the load-bearing handle;

[0040] The diameter of the spring is smaller than the diameter of the lower half, and the diameter of the through hole is smaller than the diameter of the spring and the diameter of the upper half;

[0041] The lifting handle is mounted on the upper section.

[0042] Optional,

[0043] The distance from the lower end of the upper section to the lower end of the stopper is greater than the distance from the lower end of the upper section to the L-shaped keyway;

[0044] The compression amount of the spring is not less than the distance that the stopper protrudes from the L-shaped keyway.

[0045] Optionally, the upper half is provided with a diameter-reducing section with a smaller diameter;

[0046] The lifting handle is provided with a mounting through hole, the diameter of which is larger than the diameter of the diameter-changing section and smaller than the diameter of the upper section, so that the lifting handle can be rotatably sleeved on the diameter-changing section.

[0047] The beneficial technical effects of this application are:

[0048] (1) The embodiment of the present application provides a transportation tool for a reactor nozzle flange protection device. According to the structural characteristics of the nozzle flange protection device and the difficulty in transporting the protection device, a nozzle flange protection device transportation tool is developed to fill the gap of the lack of special tools for this work, so that two workers can cooperate to transport the protection device, reduce the labor intensity of the workers, and improve the safety and work efficiency of the protection device transportation work;

[0049] (2) The embodiment of the present application provides a transport vehicle for a reactor nozzle flange protection device, which adopts a large number of hollow cylinders and hollow pipes in design, greatly reducing the overall weight of the protection device transport vehicle while ensuring that the mechanical strength meets the requirements, making it easier for staff to operate;

[0050] (3) The embodiment of the present application provides a transport tool for a reactor take-over flange protection device, which adopts a bell-mouth design at the docking point with the lifting pin to improve the connection efficiency between the transport tool and the protection device; the position of the load-bearing rod is cleverly arranged to facilitate the staff to quickly and intuitively determine whether the protection device transport tool is installed in place.

[0051] (4) The embodiment of the present application provides a transport vehicle for a reactor take-off flange protection device. An anti-slip assembly including a slide groove and a block is cleverly designed within a limited space to prevent the protection device from swinging significantly and falling off the transport vehicle during transportation. The lifting handle is designed to rotate freely relative to the transmission rod, so that the transport vehicle can be detached without the need for synchronous rotation, which is convenient for the operator to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 This is a schematic diagram of the structure of the protection device in the embodiment of the present application;

[0053] Figure 2 A schematic diagram of the structure of a transport vehicle for a reactor nozzle flange protection device provided in an embodiment of the present application;

[0054] Figure 3 A schematic structural diagram of another transport vehicle for a reactor nozzle flange protection device provided in an embodiment of the present application;

[0055] Figure 4 A schematic structural diagram of another transport vehicle for a reactor nozzle flange protection device provided in an embodiment of the present application;

[0056] Figure 5 A schematic diagram of a use state of a transport vehicle for a reactor nozzle flange protection device provided in an embodiment of the present application;

[0057] Figure 6 A schematic diagram of another usage state of a transportation vehicle for a reactor nozzle flange protection device provided in an embodiment of the present application.

[0058] In the figure:

[0059] 1- load-bearing cylinder; 11- L-type keyway, 12- opening;

[0060] 2- load-bearing handle; 21- load-bearing rod; 22- through hole;

[0061] 3-protection device; 31-lifting pin;

[0062] 4-anti-slip assembly; 41-slide; 42-block; 43-lifting rod; 44-connecting rod; 45-transmission rod, 451-lower section, 452-middle section, 453-upper section, 454-spring, 455-variable diameter section; 46-lifting handle. DETAILED DESCRIPTION

[0063] In order to make those skilled in the art better understand the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described below are only a part of the embodiments of the present application, not all. Based on the embodiments recorded in the present application, all other embodiments obtained by those skilled in the art without paying creative work are within the scope of protection of the present application.

[0064] In order to facilitate understanding of a means of transport for a reactor nozzle flange protection device provided in an embodiment of the present application, the reactor nozzle flange protection device is first introduced below.

[0065] As an important part of the reactor, the upper assembly is mainly used to seal the main sealing surface of the reactor, form a dense internal space of the reactor, establish a certain pressure, and prevent the internal components of the reactor from floating up under the action of the core water flow. At the same time, the upper assembly plays the role of fixing the control rod drive mechanism and its electrical equipment, fixing the core instrument sensor line terminals and seals. There are 141 pipes arranged on the top cover of the upper assembly, including 18 neutron temperature measurement channel pipes and 18 drive mechanism reserved pipes, and the top of the pipes are all provided with lower flanges for sealing. The 54 neutron temperature measurement channels distributed in the core are combined into 18 groups of neutron temperature measurement tube bundles, each group of 3 measurement channels, which are distributed in the 18 neutron temperature measurement channel pipes on the top cover of the upper assembly. The upper flange cooperates with the lower flange to achieve sealing with the pipe, which belongs to the primary circuit pressure boundary. The drive mechanism reserved pipe is used as the maximum installation amount reserved hole of the control rod drive mechanism, and is also provided with upper and lower flanges to achieve sealing, which also belongs to the primary circuit pressure boundary.

[0066] According to the classification of reactor equipment in the general safety rules of nuclear power plants, the pipe sealing device components belong to the safety level 2 (2H) of the normal operation system of nuclear power plants. According to the equipment classification regulations of the earthquake-resistant design specifications of nuclear power plants, the upper components belong to the earthquake-resistant category 1. It can be seen that the nuclear safety requirements and earthquake-resistant requirements of the pipe flange of the upper component top cover are very high. When designing the unit, if the pipe flange bolts suddenly break during operation, in order to prevent the pipe flange from flying off and causing a large amount of primary circuit medium to overflow, protective devices are designed and installed on the neutron temperature measurement channel pipe flange and the reserved pipe flange of the drive mechanism.

[0067] At present, the protective device is a hollow cylindrical structure made of carbon steel, and the weight of a single device ranges from 58.83Kg to 65.13Kg. Figure 1 As shown. The lower cylinder of the protective device is seated on the upper end face of the take-over flange, and the overall weight presses the upper flange. Six steel balls are evenly distributed on the upper circumference of the protective device. When the protective device is in the working position, the steel balls protrude from the protective device cylinder and are blocked by the edge of the hole in the upper component steel structure, effectively preventing the protective device from bouncing up, thereby protecting the take-over flange from always being in the working position.

[0068] In view of the various risks involved in the current situation where the protection device can only be hoisted to a special storage location by manual transportation due to the current limitations of on-site conditions, in order to fill the gap in the lack of transportation vehicles for the reactor take-over flange protection device, improve the safety and work efficiency of the protection device transportation work, reduce the burden on staff, reduce the industrial safety risks of this work, and avoid unnecessary equipment damage and economic loss incidents, an embodiment of the present application provides a transportation vehicle for the reactor take-over flange protection device.

[0069] The inventors of the present application analyzed the structure and various parameters of the protective device and considered the influencing factors of other equipment on site, and found that the transportation of the protective device has the following technical problems: (1) A single protective device is heavy, and it is necessary to consider two workers to cooperate in transportation to reduce labor intensity; (2) Find a suitable pin or hole on the protective device body as a component that is connected to the special transportation vehicle and bears the load; (3) The special transportation vehicle should be able to connect to the protective device quickly and efficiently, and be able to ensure the reliability of the connection.

[0070] To this end, an embodiment of the present application provides a transport vehicle for a reactor take-over flange protection device, which is provided with a long rod-shaped load-bearing handle to realize collaborative transportation by two people; referring to the design of the protection device disassembly and assembly tool, the lifting pin at the head of the protection device is selected as the component connected to the transport vehicle and bearing the load; the docking portion between the transport vehicle and the lifting pin adopts a trumpet-mouth design; the positions of the components are cleverly arranged to facilitate the staff to quickly determine whether the transport vehicle is installed in place, and an anti-detachment component is provided to ensure the reliability of the connection.

[0071] Based on the above content, in order to clearly and in detail illustrate the above advantages of the present application, the specific implementation methods of the present application will be described below in conjunction with the accompanying drawings.

[0072] See also Figure 2 , which is a structural schematic diagram of a transportation vehicle for a reactor take-over flange protection device provided in an embodiment of the present application.

[0073] The embodiment of the present application provides a transport tool for a reactor nozzle flange protection device, comprising: a load-bearing cylinder 1 and a load-bearing handle 2;

[0074] The outer diameter of the load-bearing cylinder 1 is smaller than the inner diameter of the surrounding cylinder of the head of the protection device 3 and is larger than the distance from the tail end of the hanging pin 31 on the protection device 3 to the center of the protection device 3;

[0075] An L-shaped keyway 11 is provided on the outer surface of the load-bearing cylinder 1, and the width of the L-shaped keyway 11 is greater than the diameter of the hanging pin 31;

[0076] One side of the L-shaped keyway 11 is provided with an opening 12 at the lower end of the load-bearing cylinder 1, and the other side of the L-shaped keyway 11 is provided perpendicular to the one side of the L-shaped keyway 11, so that the hanging pin 31 enters from the opening 12 on one side of the L-shaped keyway 11 and slides to the other side of the L-shaped keyway 11;

[0077] The load-bearing handle 2 is connected to the upper end of the load-bearing cylinder 1 through a load-bearing rod 21 and is used to lift the load-bearing cylinder 1.

[0078] In the embodiment of the present application, the load-bearing cylinder 1 is cylindrical as a whole, and its outer diameter is smaller than the inner diameter of the surrounding cylinder of the head of the protection device 3 and larger than the distance from the tail end of the hanging pin 31 on the protection device 3 to the center of the protection device 3. The width of the L-shaped keyway 11 is larger than the diameter of the hanging pin 31, ensuring that the load-bearing cylinder 1 can be inserted into the surrounding cylinder of the head of the protection device 3, and the hanging pin 31 can be fixed on the L-shaped keyway 11. The L-shaped keyway 11 is used in conjunction with the two hanging pins 31 on the head of the protection device 3 to achieve a quick connection between the transport vehicle and the protection device 3. This type of connection structure has high space utilization and is easy to connect.

[0079] In actual application, the lifting pin 31 enters from the opening 12 on one side of the L-shaped key groove 11 and slides to the other side of the L-shaped key groove 11, and then the load-bearing cylinder 1 is lifted by the load-bearing handle 2 to drive the protection device 3 to be lifted, so that the protection device 3 can be transported.

[0080] In some possible implementations of the embodiments of the present application, one side 12 of the L-shaped key slot 11 is opened in a trumpet shape, so that the L-shaped key slot 11 can be quickly connected to the lifting pin 31 to achieve fast and efficient connection between the transportation tool and the protection device 3.

[0081] In some possible implementations of the embodiments of the present application, there are two load-bearing rods 21 , the lower ends of the two load-bearing rods 21 are symmetrically fixed to the outer surface of the load-bearing cylinder 1 , and the upper ends of the two load-bearing rods 21 are fixed to the load-bearing handle 2 .

[0082] The distance from the lower end of the load-bearing rod 21 to the L-shaped key slot 11 is greater than the distance from the hanging pin 31 to the upper end of the protection device 3 , so that the L-shaped key slot 11 is connected to the hanging pin 31 .

[0083] In some possible implementations of the embodiments of the present application, the lower end of the load-bearing rod 21 is aligned with the end of the other side of the L-shaped key groove 11. When the transport tool is connected to the protection device 3, the staff can quickly determine that the transport tool has been installed in place by the intuitive phenomenon that the lifting pin 31 at the head of the protection device 3 and the load-bearing rod 21 are in the same straight line.

[0084] In some possible implementations of the embodiments of the present application, the load-bearing handle 21 is a long rod structure, the length of the load-bearing handle 21 is greater than the distance between the two load-bearing rods 2, and the two ends of the load-bearing handle 21 protrude from the two load-bearing rods 2 and can be used as gripping parts for two staff members to realize a two-person collaborative transportation protection device.

[0085] In some possible implementations of the embodiments of the present application, the load-bearing rod 2 is a hollow structure; and / or the load-bearing handle 21 is a hollow structure.

[0086] It is understandable that the load-bearing rod 2 and the load-bearing handle 21 are both hollow structures, which reduce the overall weight of the transportation vehicle while ensuring that the mechanical strength meets the requirements, thereby reducing the burden on the staff as much as possible.

[0087] In some possible implementations of the present application, the interior of the load-bearing cylinder 1 is a hollow structure. Similarly, the interior of the load-bearing cylinder 1 is a hollow structure, which can greatly reduce the overall weight of the protective device transport vehicle while ensuring that the mechanical strength meets the requirements, and is convenient for staff to operate.

[0088] In addition, in some possible implementations of the embodiments of the present application, an anti-drop assembly 4 may be provided inside the load-bearing cylinder 1 to prevent the lifting pin 31 from sliding out of the L-shaped key slot 11 during transportation, thereby causing the protective device 3 to fall off.

[0089] For details, see Figure 2 , Figure 3 and Figure 4 The transport vehicle may further include: an anti-slip assembly 4; the anti-slip assembly 4 includes a slide groove 41 vertically opened inside the load-bearing cylinder 1, and the lower end of the slide groove 41 is connected to the L-shaped key groove 11;

[0090] The anti-slip assembly 4 further includes: a stopper 42;

[0091] A stopper 42 is provided in the slide groove 41 . When the stopper 42 is located at the lower end of the slide groove 41 , the stopper 42 protrudes from the L-shaped key groove 11 . When the stopper 42 is located at the upper end of the slide groove 41 , the stopper 42 is hidden inside the load-bearing cylinder 1 .

[0092] It is understandable that the stopper 42 can move up and down in the slide groove 41 but cannot rotate circumferentially, so that the hanging pin 31 can enter the L-shaped key groove 11 in a positive direction but cannot escape from the L-shaped key groove 11 in a reverse direction, thereby playing an anti-escape function.

[0093] As an example, the height of the slide groove 41 is twice the height of the stopper 42 , ensuring that the stopper 42 can be completely hidden inside the load-bearing cylinder 1 .

[0094] In some possible implementations of the embodiments of the present application, the height of the stopper 42 is greater than the width of the L-shaped keyway 11 to ensure that it is prevented from falling off.

[0095] In some possible implementations of the embodiments of the present application, the anti-slip assembly 4 further includes: a lifting rod 43; the lifting rod 43 is used to lift and lower the stopper 42 to play an anti-slip function.

[0096] In some possible implementations of the present application, there are two slide grooves 41, which are symmetrically arranged, and each slide groove 41 is provided with a stopper 42; the lifting rod 43 includes: a connecting rod 44, a transmission rod 45 and a lifting handle 46;

[0097] The connecting rod 44 is fixedly connected to the two stoppers 42;

[0098] One end of the transmission rod 45 is fixed on the connecting rod 44, and the other end of the transmission rod 44 extends out of the interior of the load-bearing cylinder 1;

[0099] A lifting handle 46 is mounted on the other end of the transmission rod 45 .

[0100] It is understandable that by lifting the lifting handle 46 , the stopper 42 can be lifted, and the lifting pin 31 can enter the L-shaped key slot 11 in the forward direction. When the lifting handle 46 is lowered, the stopper 42 falls down, and the lifting pin 31 cannot escape from the L-shaped key slot 11 in the reverse direction.

[0101] In one example, a through hole 22 is provided on the load-bearing handle 2 for passing the other end of the transmission rod 45 .

[0102] In some possible implementations of the present application, the transmission rod 45 is divided into a lower half section 451, a middle section 452 and an upper half section 453;

[0103] The lower half 451 is located at the lower side of the load-bearing handle 2 and is fixed to the connecting rod 44;

[0104] The upper section 453 extends out of the load-bearing handle 2; the middle section 452 is provided with a spring 454 on its outer sleeve, and the spring 454 is located at the lower side of the load-bearing handle 2;

[0105] The diameter of the spring 454 is smaller than the diameter of the lower half 451 , and the diameter of the through hole 22 is smaller than the diameter of the spring 454 and the diameter of the upper half 453 ;

[0106] The lifting handle is installed on the upper half 453.

[0107] It is understandable that the spring 454 can ensure that the stopper 42 can automatically fall and lock after being in place. The lower half 451 and the load-bearing handle 2 limit the maximum elongation of the spring 454.

[0108] In some possible implementations of the present application, the distance from the lower end of the upper section 453 to the lower end of the stopper 42 is greater than the distance from the lower end of the upper section 453 to the L-shaped keyway 11;

[0109] The compression amount of the spring 454 is not less than the distance that the stopper 42 protrudes from the L-shaped key groove 11 .

[0110] In order to facilitate operation, when the load-bearing cylinder 1 and the load-bearing handle 2 rotate during the disengagement of the transport tool from the protection device 3, the lifting handle 46 does not need to rotate with the load-bearing cylinder 1 and the load-bearing handle 2 in the lifting state. In some possible implementations of the embodiment of the present application, the upper half 453 is provided with a diameter-reducing section 455 with a smaller diameter;

[0111] The lifting handle 46 is provided with a mounting through hole, the diameter of which is larger than the diameter of the diameter-changing section 455 and smaller than the diameter of the upper section 453 , so that the lifting handle 46 can be rotatably sleeved on the diameter-changing section 455 .

[0112] The following describes in detail a method for installing and using a transportation vehicle for a reactor nozzle flange protection device provided by an embodiment of the present application with reference to a specific example.

[0113] See also Figure 5 and Figure 6 The installation and use method of a transportation tool for a reactor take-over flange protection device provided in an embodiment of the present application is as follows:

[0114] In the initial state of a transport tool for a reactor nozzle flange protection device provided by an embodiment of the present application, the stopper 42 is pressed against the lower end surface of the slide groove 41 under the action of the spring 454, blocking the opening 12 of the L-shaped keyway 11. Pick up the transport tool, align the opening 12 with the lifting pin 31 at the head of the protection device 3, and insert the lifting pin 31 downward. The lifting pin 31 quickly enters the L-shaped keyway 11 under the guidance of the opening 12. The lifting pin 31 contacts the stopper 42 and continues to be inserted downward, and the stopper 42 is lifted up, exposing the horizontal section of the L-shaped keyway 11.

[0115] Then, the transport tool is rotated to the bottom, and the connection is determined to be in place by the load-bearing rod 21 and the hanging pin 31 being in the same straight line. At this time, the stopper 42 returns to the initial position under the action of the spring 454, blocking the passage of the L-shaped keyway 11, and preventing the hanging pin 31 from coming out of the L-shaped keyway 11 in the reverse direction.

[0116] After that, two staff members cooperate to lift the load-bearing handle 2 to transport the protection device 3 to the designated site. Lift the lifting handle 46 to the top, the stopper 42 moves up to the upper end of the slide 41, and the L-shaped keyway 11 opens. Then rotate the transport tool to the bottom and lift it up, the transport tool can be separated from the protection device 3, and the transportation of the protection device 3 is completed.

[0117] The transport tool for a reactor take-over flange protection device provided in the embodiment of the present application solves the problem of the difficulty in transporting the protection device, improves the safety and work efficiency of the protection device transportation work, reduces the burden on the staff, reduces the industrial safety risk of the work, and avoids unnecessary equipment damage and economic loss events. The transport tool for a reactor take-over flange protection device provided in the embodiment of the present application can be promoted and applied in related work of the same type of units.

[0118] The transportation tool for the reactor nozzle flange protection device provided by the embodiment of the present application can be extended to the transportation of other similar equipment in power plants.

[0119] The transportation tool for a reactor nozzle flange protection device provided in the embodiment of the present application also has good reference significance for the transportation of other similar equipment in the same industry.

[0120] The present application is described in detail above in conjunction with the accompanying drawings and embodiments, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present application. Any content not described in detail in the present application can adopt the existing technology.

Claims

1. A transport vehicle for a reactor nozzle flange protection device, characterized in that: The transport tool comprises: a load-bearing cylinder and a load-bearing handle; the outer diameter of the load-bearing cylinder is smaller than the inner diameter of the protective device head circumference cylinder and larger than the distance from the tail end of the lifting pin on the protective device to the center of the protective device; the interior of the load-bearing cylinder is a hollow structure; an L-shaped key groove is provided on the outer surface of the load-bearing cylinder, and the width of the L-shaped key groove is larger than the diameter of the lifting pin; one side of the L-shaped key groove is provided with an opening at the lower end of the load-bearing cylinder, and the other side of the L-shaped key groove is provided perpendicular to one side of the L-shaped key groove, so that the lifting pin enters and slides from one side of the L-shaped key groove to the other side of the L-shaped key groove; the load-bearing handle is connected to the upper end of the load-bearing cylinder through a load-bearing rod for lifting the load-bearing cylinder; the transport tool further comprises: an anti-slip assembly; the anti-slip assembly comprises a slide groove vertically provided inside the load-bearing cylinder, and the lower end of the slide groove is connected to the L-shaped key groove; the anti-slip assembly also comprises: a stopper and a lifting rod; The stopper is arranged in the slide groove, and when the stopper is located at the lower end of the slide groove, the stopper protrudes from the L-shaped key groove; when the stopper is located at the upper end of the slide groove, the stopper is hidden inside the load-bearing cylinder; the lifting rod is used to lift and lower the stopper; There are two slide grooves, which are symmetrically arranged, and a block is arranged in each slide groove; the lifting rod includes: a connecting rod, a transmission rod and a lifting handle; the connecting rod is fixedly connected to the two blocks; one end of the transmission rod is fixed on the connecting rod, and the other end of the transmission rod extends out of the interior of the load-bearing cylinder; the lifting handle is installed at the other end of the transmission rod.

2. The transportation vehicle for the reactor nozzle flange protection device according to claim 1, characterized in that: One side opening of the L-shaped keyway is trumpet-shaped.

3. The transportation vehicle for the reactor nozzle flange protection device according to claim 1, characterized in that: There are two load-bearing rods, the lower ends of the two load-bearing rods are symmetrically fixed to the outer surface of the load-bearing cylinder, and the upper ends of the two load-bearing rods are fixed to the load-bearing handles; the distance from the lower end of the load-bearing rod to the L-shaped key groove is greater than the distance from the lifting pin to the upper end of the protective device.

4. The transportation vehicle for the reactor nozzle flange protection device according to claim 3, characterized in that: The lower end of the load-bearing rod is aligned with the end of the other side of the L-shaped keyway.

5. The transportation vehicle for the reactor nozzle flange protection device according to claim 3, characterized in that: The load-bearing handle is a long rod structure, and the length of the load-bearing handle is greater than the distance between the two load-bearing rods.

6. The transportation vehicle for the reactor nozzle flange protection device according to claim 3, characterized in that: The load-bearing rod is a hollow structure; and / or the load-bearing handle is a hollow structure.

7. The transportation vehicle for the reactor nozzle flange protection device according to claim 1, characterized in that: The height of the stopper is greater than the width of the L-shaped keyway.

8. The transportation vehicle for the reactor nozzle flange protection device according to claim 5, characterized in that: The load-bearing handle is provided with a through hole for passing the other end of the transmission rod.

9. The transportation vehicle for the reactor nozzle flange protection device according to claim 1, characterized in that: The transmission rod is divided into a lower section, a middle section and an upper section; the lower section is located at the lower side of the load-bearing handle and is fixed to the connecting rod; the upper section extends out of the load-bearing handle; a spring is provided on the outer sleeve of the middle section, and the spring is located at the lower side of the load-bearing handle; the diameter of the spring is smaller than the diameter of the lower section, and the diameter of the through hole is smaller than the diameter of the spring and the diameter of the upper section; the lifting handle is installed on the upper section.

10. The transportation vehicle for the reactor nozzle flange protection device according to claim 9, characterized in that: The distance from the lower end of the upper section to the lower end of the stopper is greater than the distance from the lower end of the upper section to the L-shaped keyway; the compression amount of the spring is not less than the distance that the stopper protrudes from the L-shaped keyway.

11. The transportation vehicle for the reactor nozzle flange protection device according to claim 10, characterized in that: The upper half is provided with a reducing section with a smaller diameter; the lifting handle is provided with a mounting through hole, the diameter of which is larger than the diameter of the reducing section and smaller than the diameter of the upper half, so that the lifting handle can be rotatably mounted on the reducing section.

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