Nuclear island graphite sphere feeding device

Abstract

The present application belongs to the technical field of nuclear power engineering construction, and particularly relates to a nuclear island graphite ball feeding device. The device comprises a material taking device, a single loading tool and a slow descending pipeline. The outlet of the material taking device is arranged on the single loading tool, the outlet of the single loading tool is connected with the slow descending pipeline, and the slow descending pipeline is input to a pressure vessel. The present application has the advantages that: the material taking device adopts a dumping ball taking mode, which is high in efficiency and low in cost; the material taking device is fixed on a portal crane trolley and can move with the trolley to the cabin direction, so that the flexibility is high and the loading efficiency is high; a buffer is arranged in the slow descending pipeline to avoid damage to the fuel element caused by too fast ball speed; and the installation process can reduce the damage risk of the fuel element and improve the installation efficiency.

Description

Technical Field

[0001] This invention belongs to the field of nuclear power engineering construction technology, specifically relating to a nuclear island graphite ball feeding device. Background Technology

[0002] High-temperature gas-cooled reactors (HTGRs) are advanced nuclear energy technologies with independent intellectual property rights in my country, possessing fourth-generation technological characteristics. They have inherent safety features, wide application areas, and very broad commercial prospects. The installation of graphite spheres is a challenging aspect of the installation process and a crucial step affecting the overall construction quality of the nuclear power plant.

[0003] It is necessary to optimize the original installation process to ensure the project schedule is met, and to ensure the quality of the installation of the main equipment in the nuclear island.

[0004] Researching how to shorten the modular installation period of graphite spheres, effectively reducing the installation time, improving safety and efficiency, ensuring safety and improving installation quality is of great significance for improving the engineering construction level and market competitiveness of high-temperature gas-cooled reactor nuclear power plants. Therefore, a near-end feeding device is designed and constructed to install graphite spheres. Summary of the Invention

[0005] The purpose of this invention is to provide a nuclear island graphite ball feeding device that can solve the problem of large quantity and compressed installation period of graphite balls in high-temperature gas-cooled reactor modules.

[0006] The technical solution of the present invention is as follows: a nuclear island graphite ball feeding device includes a material taking device, a single chemical material tooling, and a slow-descent pipeline. The outlet of the material taking device is set on the single chemical material tooling, and the outlet of the single chemical material tooling is connected to the slow-descent pipeline, which is input to the pressure vessel. The material taking device includes a hopper, a tilting drive assembly, a new fuel tank, a fixing device, a tilting limit assembly, and a base. The tilting limit assembly is installed on the base, and the tilting drive assembly is set on the upper part of the tilting limit assembly. The tilting drive assembly is installed on the base, and the fixing device is installed on the tilting drive assembly. The new fuel tank is installed on the fixing device.

[0007] The material handling device is mounted on the gantry crane trolley.

[0008] The single-material filling fixture is equipped with nylon casters at the bottom.

[0009] The outlet of the single chemical filling tool is connected to a slow-descent pipeline via a crimp-type quick-connect coupling.

[0010] The upper part of the new fuel tank is a hopper.

[0011] The single-component tooling includes an outer frame, a flow guide plate, three-section upgrade guide plates, and a drive unit. The flow guide plate is installed inside the outer frame, one end of the flow guide plate is connected to the three-section upgrade guide plate, and the lower part of the three-section upgrade guide plate is connected to the drive unit.

[0012] The single-fuel tooling has dimensions of 2500×1500×1600mm and a maximum buffer capacity of 5500 fuel balls.

[0013] The beneficial effects of this invention are as follows: This invention employs various professional designs and advanced processes, thereby reducing installation difficulty and improving installation quality. The material handling device adopts a tilting ball-handling method, which is highly efficient and low-cost; the material handling device is fixed on the gantry crane trolley and can move with the trolley towards the compartment, offering high flexibility and high loading efficiency; a buffer is installed in the slow-descent pipeline to prevent damage to the fuel elements due to excessive ball speed; this installation process can reduce the risk of fuel element damage and improve installation efficiency. Attached Figure Description

[0014] Figure 1 A schematic diagram of the nuclear island graphite ball feeding device provided by the present invention; Figure 2 This is a schematic diagram of the material handling device; Figure 3 This is a schematic diagram of a single-material loading fixture.

[0015] In the diagram: 11 Material handling device, 12 Single material handling fixture, 13 Slow-descent pipeline, 14 Gantry crane trolley, 15 Nylon caster wheel, 16 Quick-connect coupling, 17 Pressure vessel, 21 Hopper, 22 Tilting drive assembly, 23 New fuel tank, 24 Fixing device, 25 Tilting limit assembly, 26 Base. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] like Figure 1 As shown, the nuclear island graphite ball feeding device includes a material handling device 11, a single-material tooling 12, and a slow-descent pipeline 13. The material handling device 11 is mounted on a gantry crane trolley 14, and the outlet of the material handling device 11 is located on the single-material tooling 12. Nylon casters 15 are installed at the lower part of the single-material tooling 12. The outlet of the single-material tooling 12 is connected to the slow-descent pipeline 13 through a snap-fit ​​quick-connect coupling 16. The slow-descent pipeline 13 feeds into the pressure vessel 17.

[0018] The material handling device 11 can remove the spherical components from the new fuel tank into the hopper of the single material handling fixture while ensuring that the spherical components are intact and do not overflow, thus greatly improving the material handling efficiency. The single material handling fixture can not only ensure that the spherical components fall evenly into the pressure vessel, but also has a certain storage function. The slow descent pipeline can ensure the safe dropping of the spheres from the outlet of the single material handling fixture to the bottom of the pressure vessel, thus ensuring the quality of the reactor module graphite sphere installation.

[0019] The material handling device quickly picks up the graphite balls while ensuring their integrity; the picked-up graphite balls are placed into a single discharge device, and the single-discharge tooling ensures that the spherical components fall into the pressure vessel uniformly and singly, and has a certain ball storage capacity; the slow-descent pipeline ensures that the graphite balls fall safely into the pressure vessel.

[0020] like Figure 2 As shown, the material handling device includes a hopper 21, a tilting drive assembly 22, a new fuel tank 23, a fixing device 24, a tilting limit assembly 25, and a base 26. The tilting limit assembly 25 is mounted on the base 26, and the tilting drive assembly 22 is located on top of the tilting limit assembly 25. The tilting drive assembly 22 is mounted on the base 26, and the fixing device 24 is mounted on the tilting drive assembly 22. The new fuel tank 23 is mounted on the fixing device 24, and the hopper 21 is located on top of the new fuel tank 23. The tilting drive assembly 22 is the power source for the tilting mechanism. When the motor of the tilting mechanism fails, emergency measures can be taken by manually driving the mechanism to ensure the continuity of operation.

[0021] like Figure 3 As shown, the single-fuel loading fixture 12 includes an outer frame 31, a flow guide plate 32, three-section upgrade guide plates 34, and a drive unit 33. The flow guide plate 32 is installed inside the outer frame 31, with one end of the flow guide plate 32 connected to the three-section upgrade guide plate 34. The drive unit 33 is connected to the lower part of the three-section upgrade guide plate 34. Its dimensions are 2500×1500×1600mm, and its maximum buffer capacity is 5500 fuel balls. A handwheel is installed at the tail end of the drive unit 33 for emergency unloading in case of failure. Upon receiving a command, the loading fixture opens the downstream isolation baffle and activates the disturbance mechanism to begin loading. If the fuel ball flow becomes blocked, the tank cover is opened, and manual bridging is performed at the bridging location. Once the current batch has been completely discharged, the disturbance stops, the isolation components are closed, and the loading operation resumes.

[0022] The upper part of the tilting limit assembly is equipped with a tilting drive assembly, which is mounted on the base. A fixing device is installed on the tilting drive assembly, consisting of a moving frame, baffle, limit pins, wrench, chain, and other components. The moving frame is welded from hollow square steel, arc plate, and steel plate, and a baffle is welded onto it to restrict the container's degrees of freedom. In use, the storage container is first hoisted into the moving frame, then the limit pins (6 on the bottom three sides + 2 on the side walls) are manually inserted and secured with a wrench. The fixing device is welded to the tilting limit assembly to prevent displacement of the fixing device during tilting.

[0023] A new fuel tank is installed on the fixed device, and the upper part of the new fuel tank is a hopper. The feeding hopper consists of a hopper body, baffle, buckle and other components. The hopper body is welded from 1mm 304 thin plate. The baffle consists of a baffle and a handle. It is in the inserted state during the feeding and turning of new material, and is pulled out to release the material after the turning is completed.

[0024] When using the feeding hopper, open the top cover of the fuel tank, manually lift it to the top opening of the fuel tank of the tipper, check whether the buckle is locked, insert the baffle assembly, tip the tank after the material is poured, open the buckle to remove the feeding hopper, and finally lift and move the tank after the material has been poured.

[0025] The single-fuel tooling measures 2500×1500×1600mm and has a maximum buffer capacity of 5500 fuel balls. It includes an outer frame, a flow guide plate, three upgrade guide plates, and a drive unit. The flow guide plate is installed inside the outer frame, with one end of the flow guide plate connected to the three upgrade guide plates, and the drive unit connected to the lower part of the three upgrade guide plates.

[0026] The single unit's outer frame consists of profiles, a 1.5mm 304 steel plate shell, acrylic plate windows on opposite sides, a manual emergency window, nylon casters, a receiving hopper, and an output inclined pipe. The receiving hopper is padded with expanding sponge for cushioning to prevent damage. X-shaped cross reinforcing ribs are welded under the frame to improve the stability of the device.

[0027] The diversion plate is supported by a 12° inclined stainless steel plate. A single-layer height limiting plate and a guide plate are installed near the drive unit of the diversion plate. The single-layer height limiting plate functions to convert the multi-layer ball into a single-layer ball for output to the drive unit. The drive unit consists of components such as a drive motor, reducer, coupling, drive shaft, drive wheel, and housing. Both the drive wheel and housing are made of 304 stainless steel plate. The drive wheel features a contoured design to reduce the probability of fuel ball breakage. The drive unit is equipped with an emergency handwheel, allowing for fuel loading in case of electric component failure.

[0028] The aforementioned slow-descent pipeline uses a PVC steel wire hose, with a length of approximately 28m, and is equipped with a buffer to prevent excessive ball speed from damaging the fuel element.

Claims

1. A nuclear island graphite ball feeding device, characterized in that: The device includes a material handling unit, a single-material tooling, and a slow-descent pipeline. The outlet of the material handling unit is located on the single-material tooling, and the outlet of the single-material tooling is connected to the slow-descent pipeline, which leads to a pressure vessel. The material handling unit includes a hopper, a tilting drive assembly, a new fuel tank, a fixing device, a tilting limit assembly, and a base. The tilting limit assembly is mounted on the base, and the tilting drive assembly is located on the upper part of the tilting limit assembly. The tilting drive assembly is mounted on the base, and the fixing device is mounted on the tilting drive assembly. The new fuel tank is mounted on the fixing device.

2. The nuclear island graphite ball feeding device as described in claim 1, characterized in that: The material handling device is mounted on the gantry crane trolley.

3. The nuclear island graphite ball feeding device as described in claim 1, characterized in that: The single-material filling fixture is equipped with nylon casters at the bottom.

4. The nuclear island graphite ball feeding device as described in claim 1, characterized in that: The outlet of the single chemical filling tool is connected to a slow-descent pipeline via a crimp-type quick-connect coupling.

5. The nuclear island graphite ball feeding device as described in claim 1, characterized in that: The upper part of the new fuel tank is a hopper.

6. The nuclear island graphite ball feeding device as described in claim 1, characterized in that: The single-component tooling includes an outer frame, a flow guide plate, three-section upgrade guide plates, and a drive unit. The flow guide plate is installed inside the outer frame, one end of the flow guide plate is connected to the three-section upgrade guide plate, and the lower part of the three-section upgrade guide plate is connected to the drive unit.

7. The nuclear island graphite ball feeding device as described in claim 1, characterized in that: The single-fuel tooling has dimensions of 2500×1500×1600mm and a maximum buffer capacity of 5500 fuel balls.

Images