Lifting device, modular high temperature gas cooled reactor fuel handling system

Abstract

The application discloses a lifting device, which comprises a conveying pipe, a fuel element lifting bucket capable of moving up and down in the conveying pipe, and a motor installed outside the conveying pipe; the top end of the conveying pipe is inserted with a main shaft capable of rotating around its own axis, and the upper and lower parts are respectively provided with a fuel element feeding port and a receiving port; the fuel element lifting bucket is connected to the main shaft through a steel wire rope; the top of the fuel element lifting bucket is provided with a lifting bucket receiving port capable of being aligned with the fuel element receiving port, and the bottom of the fuel element lifting bucket is provided with a lifting bucket feeding port capable of being aligned with the fuel element feeding port; and the motor drives the main shaft to rotate. The device is powered by the motor, drives the fuel element lifting bucket to move up and down in the conveying pipe, and realizes the conveying of the fuel element to the top of the reactor core by lifting the fuel element from the bottom to the fuel element feeding port at a high position, thereby avoiding the impact and collision of the airflow carrying the fuel element on the conveying pipe caused by the pneumatic conveying mode, preventing the fuel element from being broken, improving the lifting reliability of the fuel element, and ensuring the completeness. The application further discloses a modular high-temperature gas cooled reactor fuel loading and unloading system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material lifting and conveying, in particular to a lifting device, and further relates to a modular high-temperature gas cooled reactor fuel handling system. BACKGROUND

[0002] In industrial production, materials often need to be lifted to a high place for loading, such as the lifting device provided in the modular high-temperature gas cooled reactor fuel handling system to lift the fuel elements to the core loading port. The lifting device is an important component of the fuel handling system, which is used to lift the fuel elements discharged from the core to the loading port height so as to be loaded into the core.

[0003] At present, the lifting device generally adopts pneumatic conveying, which relies on high-speed gas under positive pressure as power to lift the spherical fuel elements to the top of the core in the conveying pipe. Although pneumatic conveying has the advantages of flexible arrangement of the conveying pipe, less leakage in the closed conveying pipe, and suitability for continuous conveying, the gas flow carrying the fuel elements constantly impacts the conveying pipe during the conveying process, which is easy to cause the fuel elements to be broken.

[0004] In addition, the pneumatic conveying method also has the disadvantages of large power consumption, conveying pipe wear, difficulty in separating and dust removal of fuel element debris, easy blockage of the pipeline, low fuel element lifting efficiency, large vibration of the entire lifting device, and inconvenience for maintenance.

[0005] Therefore, how to provide a lifting device to reduce the breakage of fuel elements is a problem to be solved by those skilled in the art. SUMMARY

[0006] Therefore, the present application provides a lifting device which uses a motor to drive a fuel element bucket to move up and down in the conveying pipe to lift the fuel elements to a high place. Compared with the pneumatic conveying method, the lifting device avoids the impact and collision of the gas flow carrying the fuel elements on the conveying pipe, thereby reducing the breakage of the fuel elements and improving the integrity of the fuel elements. The present application also provides a modular high-temperature gas cooled reactor fuel handling system using the above lifting device, which is beneficial to improve the reliability of the fuel element lifting, reduce the breakage, and protect the integrity of the fuel elements.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0008] A lifting device, comprising:

[0009] a conveying pipe, a main shaft is inserted and assembled at the top end of the conveying pipe, and the main shaft can rotate around its own axis; the upper part of the conveying pipe is provided with a fuel element feeding port, and the lower part is provided with a fuel element receiving port;

[0010] A fuel element lifting bucket is arranged in the conveying pipe in a movable manner and is connected to the main shaft by a steel wire rope; the top of the fuel element lifting bucket is provided with a lifting bucket material receiving port which is aligned with the fuel element material receiving port, and the bottom of the fuel element lifting bucket is provided with a lifting bucket material feeding port which is aligned with the fuel element material feeding port.

[0011] An electric motor is installed outside the conveying pipe and is used to drive the main shaft to rotate and to lift or lower the fuel element lifting bucket.

[0012] Preferably, in the lifting device, the fuel element lifting bucket comprises:

[0013] A lifting bucket cylinder is provided with the lifting bucket material receiving port at the top end and the lifting bucket material feeding port at the bottom end;

[0014] A central cylinder is inserted into the lifting bucket cylinder and is coaxially arranged with the lifting bucket cylinder;

[0015] A spiral plate is arranged between the lifting bucket cylinder and the central cylinder and is fixedly connected to the lifting bucket cylinder and / or the central cylinder; the spiral plate, the lifting bucket cylinder and the central cylinder form a spiral flow channel;

[0016] A cover plate is arranged on the top end of the lifting bucket cylinder and the top end of the central cylinder and is fixedly connected to the steel wire rope;

[0017] A bottom plate is fixedly arranged on the bottom end of the lifting bucket cylinder and the bottom end of the central cylinder.

[0018] Preferably, in the lifting device, the lifting bucket material receiving port and the lifting bucket material feeding port are arranged in a staggered manner along the circumference of the lifting bucket cylinder.

[0019] Preferably, in the lifting device, a dust outlet is arranged at the center of the bottom plate.

[0020] Preferably, in the lifting device, a dust tank is further arranged, the dust tank is communicated with the bottom of the conveying pipe through a dust outlet pipe, and the dust tank is provided with a gas outlet.

[0021] Preferably, in the lifting device, a buffer device is arranged at the bottom of the conveying pipe, and the buffer device is supported by a first detachable device arranged at the bottom of the conveying pipe.

[0022] Preferably, in the lifting device, a raw material input pipe is arranged at the fuel element material receiving port in the conveying pipe, the raw material input pipe is provided with a new fuel element inlet and a purge port, and a material feeding pipe is arranged at the fuel element material feeding port in the conveying pipe.

[0023] Preferably, in the lifting device, the conveying pipe comprises a lifting section and a maintenance section which are separate from each other; the lifting section and the maintenance section are fixed by a second detachable device; and the lifting section is located above the maintenance section.

[0024] Preferably, in the lifting device, a roller support is fixed in the conveying pipe; the main shaft is rotatably installed on the roller support along an axis of the main shaft; the main shaft is inserted into the conveying pipe through a power input port of the conveying pipe; and the motor is connected to the main shaft through a magnetic transmission device which is installed at the power input port.

[0025] A modular high-temperature gas cooled reactor fuel handling system comprises the lifting device.

[0026] The lifting device comprises a conveying pipe, a fuel element bucket and a motor; a main shaft is inserted into a top end of the conveying pipe and is rotatable along an axis of the main shaft; a fuel element feeding port is arranged at an upper portion of the conveying pipe, and a fuel element receiving port is arranged at a lower portion of the conveying pipe; the fuel element bucket is movably arranged in the conveying pipe and is connected to the main shaft through a steel wire rope; a bucket receiving port which is aligned with the fuel element receiving port is arranged at a top portion of the fuel element bucket, and a bucket feeding port which is aligned with the fuel element feeding port is arranged at a bottom portion of the fuel element bucket; and the motor is installed outside the conveying pipe and is used to drive the main shaft to rotate and to lift or lower the fuel element bucket.

[0027] The lifting device utilizes the motor to provide power and to drive the fuel element bucket to move up and down in the conveying pipe, thereby achieving the conveying of the fuel element from the bottom to the fuel element feeding port at a high position and to the top of the reactor core. Compared with the pneumatic conveying method, the fuel element is prevented from being damaged due to the impact and collision of the airflow on the conveying pipe, and the integrity of the fuel element is improved.

[0028] In addition, the lifting device utilizes the motor to provide power and to lift the fuel element by lifting the fuel element bucket. Compared with the pneumatic conveying method in the prior art, the power consumption is greatly reduced, the fuel element is ensured to run stably during the lifting process, the fuel element is prevented from colliding with the inner wall of the fuel element bucket, the fuel element bucket is prevented from being abraded, the generation of dust and debris is reduced, the conveying pipe is prevented from being blocked, the difficulty of dust separation is greatly reduced, the vibration of the lifting device is reduced, and the noise is weakened. Meanwhile, the fuel element bucket is provided with a spiral plate, the lifting of multiple fuel elements is achieved, and the conveying efficiency is improved.

[0029] The lifting device is also provided in a modular high-temperature gas cooled reactor fuel handling system, which is beneficial to protecting the conveying pipe from impact damage and improving the reliability of the conveying pipe. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments or prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0031] Figure 1 The structural schematic diagram of the lifting device provided by the embodiment of the present application when receiving spherical fuel elements is shown in the figure.

[0032] Figure 2 The structural schematic diagram of the lifting device provided by the embodiment of the present application when conveying spherical fuel elements to the reactor core is shown in the figure.

[0033] Figure 3 The structural schematic diagram of the fuel element bucket provided by the embodiment of the present application is shown in the figure.

[0034] Figure 4 The structural schematic diagram of the dust outlet in the fuel element bucket provided by the embodiment of the present application is shown in the figure.

[0035] Among them, Figures 1-4 Among them,

[0036] Gas outlet 1; dust tank 2; first detachable device 3; buffer device 4; maintenance section 5; fuel element bucket 6; second detachable device 7; lifting section 8; detection port 9; motor 10; magnetic drive 11; power input port 12; main shaft 13; third detachable device 14; roller support 15; steel wire rope reel 16; steel wire rope 17; fuel element feeding port 18; fuel element receiving port 19; new fuel element inlet 20; purge port 21; dust passage 22; dust outlet pipe 23; bucket cylinder 24; spiral plate 25; center cylinder 26; cover plate 27; lifting piece 28; bucket receiving port 29; bucket feeding port 30; bottom plate 31; dust outlet 32. DETAILED DESCRIPTION

[0037] The embodiment of the present application discloses a lifting device, which drives a fuel element bucket to move up and down in a conveying pipe by using a motor to realize lifting of the fuel element to a high place. Compared with the pneumatic conveying mode, the fuel element is not impacted and collided by airflow to avoid breakage of the fuel element, and the integrity of the fuel element is improved. The embodiment of the present application also discloses a modular high-temperature gas cooled reactor fuel handling system applying the lifting device, which is beneficial to improve the reliability of the fuel element lifting, reduce breakage, and protect the integrity of the fuel element.

[0038] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts are within the protection scope of the present application.

[0039] Please refer to Figures 1-4 The embodiment of the present application provides a lifting device, which comprises a conveying pipe, a fuel element lifting bucket 6 and a motor 10; a main shaft 13 is inserted into the top end of the conveying pipe, and the main shaft 13 can rotate around its own axis; the upper part of the conveying pipe is provided with a fuel element feeding port 18, and the lower part is provided with a fuel element receiving port 19; the fuel element lifting bucket 6 is movably arranged in the conveying pipe in an up-down direction, and the fuel element lifting bucket 6 is connected with the main shaft 13 through a steel wire rope 17; the top of the fuel element lifting bucket 6 is provided with a lifting bucket receiving port 29 which can be aligned with the fuel element receiving port 19, and the bottom of the fuel element lifting bucket 6 is provided with a lifting bucket feeding port 30 which can be aligned with the fuel element feeding port 18; the motor 10 is installed outside the conveying pipe, and is used to drive the main shaft 13 to rotate and to lift or lower the fuel element lifting bucket 6.

[0040] The lifting device utilizes the motor 10 to provide power, drives the fuel element lifting bucket 6 to move up and down in the conveying pipe, and realizes the conveying of the fuel element from the bottom to the fuel element feeding port 18 at a high position to the top of the reactor core, compared with the pneumatic conveying mode, avoids the impact and collision of the airflow carrying the fuel element on the conveying pipe, and improves the integrity of the fuel element.

[0041] In addition, the lifting device provided by the embodiment of the present application utilizes the motor 10 to provide power, realizes the lifting of the fuel element by lifting the fuel element lifting bucket 6, compared with the pneumatic conveying mode in the prior art, greatly reduces the power consumption, ensures the stable operation of the fuel element in the lifting process, avoids the collision between the fuel element and the inner wall of the fuel element lifting bucket 6, avoids the abrasion of the fuel element lifting bucket 6, reduces the generation of dust and debris, avoids the blockage of the conveying pipe, greatly reduces the difficulty of dust separation, further reduces the vibration of the lifting device, and reduces the noise. Meanwhile, the fuel element lifting bucket 6 is provided with a spiral plate 25, which can realize the lifting of multiple fuel elements and improve the conveying efficiency.

[0042] As shown in Figures 3-4 The fuel element lifting bucket 6 comprises:

[0043] A lifting bucket cylinder 24, the top end of the lifting bucket cylinder 24 is provided with a lifting bucket receiving port 29, and the bottom end is provided with a lifting bucket feeding port 30;

[0044] A center cylinder 26, the center cylinder 26 is inserted into the lifting bucket cylinder 24 and is coaxially arranged with the lifting bucket cylinder 24;

[0045] Spiral plate 25 is arranged between the bucket barrel 24 and the center barrel 26, and is fixedly connected with the bucket barrel 24 and / or the center barrel 26; the spiral plate 25, the bucket barrel 24 and the center barrel 26 form a spiral flow channel; the upper end of the spiral flow channel is communicated with the bucket receiving port 29, and the lower end is communicated with the bucket feeding port 30;

[0046] Cover plate 27 covers and is fixed to the top end of the bucket barrel 24 and the top end of the center barrel 26; the cover plate 27 is fixedly connected with the steel wire rope 17;

[0047] Bottom plate 31 is fixed to the bottom end of the bucket barrel 24 and the bottom end of the center barrel 26.

[0048] The cover plate 27 is provided with a lifting piece 28 fixedly connected with the steel wire rope 17. The bucket receiving port 29 and the bucket feeding port 30 are arranged in a staggered manner along the circumference of the bucket barrel 24.

[0049] The raw material input pipe is arranged at the fuel element receiving port 19 of the conveying pipe, and is provided with a new fuel element inlet 20 and a purge port 21; the feeding pipe connected with the reactor core is arranged at the fuel element feeding port 18 of the conveying pipe.

[0050] In use, when the fuel element bucket 6 is lowered to the bottom end of the conveying pipe (see Figure 1 ), the bucket receiving port 29 on the fuel element bucket 6 is just opposite to the fuel element receiving port 19, and the spherical fuel elements at the bottom of the reactor core flow into the fuel element bucket 6 through the purge port 21, the new fuel element inlet 20, the fuel element receiving port 19 and the bucket receiving port 29 in sequence, and roll down along the spiral flow channel under the action of gravity, thereby achieving the receiving of the discharged fuel elements of the reactor core; the new fuel elements flow into the fuel element bucket 6 through the new fuel element inlet 20, the fuel element receiving port 19 and the bucket receiving port 29, and roll down along the spiral flow channel by gravity, thereby achieving the receiving of the new fuel. When the fuel element bucket 6 is raised to the upper part of the conveying pipe (see Figure 2 ), the bucket feeding port 30 on the fuel element bucket 6 is just opposite to the fuel element feeding port 18, and the fuel elements in the fuel element bucket 6 are sent into the reactor core through the feeding pipe connected with the reactor core, thereby achieving the feeding of the reactor core.

[0051] The bucket receiving port 29 and the bucket feeding port 29 are arranged in a staggered manner along the circumference of the bucket barrel 24, so that the fuel element feeding port 18 and the fuel element receiving port 19 are arranged in a staggered manner along the circumference of the conveying pipe, which can avoid the fuel elements flowing out of the bucket feeding port 30 to the fuel element receiving port 19 during the lifting of the fuel element bucket 6.

[0052] Specifically, the fuel element lifting bucket 6 is provided with a dust outlet 32 at the center of the bottom plate 31.

[0053] In the embodiment, the fuel element lifting bucket 6 cooperates with the dust outlet pipe 23 and the dust tank 2 to collect the dust of the fuel element, and the structure is simple and the dust recovery effect is good.

[0054] Specifically, the lifting device is provided with a buffer device 4 at the inner bottom of the conveying pipe, and the buffer device 4 is supported by the first detachable device 3 installed at the bottom of the conveying pipe.

[0055] The conveying pipe comprises a lifting section 8 and a maintenance section 5 which are detachable from each other, and the lifting section 8 and the maintenance section 5 are fixed by the second detachable device 7, and the lifting section 8 is located above and the maintenance section 5 is located below.

[0056] Specifically, the lifting device is provided with a roller support 15 fixed in the conveying pipe, and the main shaft 13 is rotatably installed on the roller support 15, and the main shaft 13 is inserted into the conveying pipe through the power input port 12 of the conveying pipe, and the motor 10 is connected with the main shaft 13 through the magnetic transmission 11, and the magnetic transmission 11 is installed at the power input port 12 through the detachable device.

[0057] The lifting device provided by the embodiment can continuously and airtightly convey the fuel element, the conveying process can maintain the pressure when the reactor is normally working, and the radioactive dust overflow is less.

[0058] In addition, the lifting device provided by the embodiment is provided with a plurality of detachable devices, which is convenient for maintenance.

[0059] The embodiment further provides a modular high-temperature gas cooled reactor fuel loading and unloading system, which comprises the lifting device provided by the above embodiment.

[0060] The modular high-temperature gas cooled reactor fuel loading and unloading system provided by the embodiment applies the lifting device provided by the above embodiment, which is beneficial to protect the conveying pipe from impact damage and improve the reliability of the conveying pipe.

[0061] In the specification, each embodiment is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

[0062] The foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Modifications of these embodiments will occur to persons of skill in the art, and, while certain embodiments according to the principles set forth herein have been shown and described, various modifications and substitutions can be made thereto without departing from the spirit and scope of the application as these broadly disclosed. Therefore, the application is not to be limited only to the embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hoisting apparatus characterized by, The application relates to a lifting device for fuel elements. The lifting device comprises: a conveying pipe, a top end of the conveying pipe being provided with a main shaft capable of rotating around its own axis, an upper part of the conveying pipe being provided with a fuel element feeding port, and a lower part of the conveying pipe being provided with a fuel element receiving port; a fuel element bucket, the fuel element bucket being movably arranged in the conveying pipe and being connected with the main shaft through a steel wire rope, a top part of the fuel element bucket being provided with a bucket receiving port capable of being aligned with the fuel element receiving port, and a bottom part of the fuel element bucket being provided with a bucket feeding port capable of being aligned with the fuel element feeding port; a motor, the motor being installed outside the conveying pipe and being used for driving the main shaft to rotate and lifting or lowering the fuel element bucket. The fuel element bucket comprises: a bucket cylinder, the bucket cylinder being provided with the bucket receiving port at a top end and being provided with the bucket feeding port at a bottom end; a center cylinder, the center cylinder being inserted into the bucket cylinder and being coaxially arranged with the bucket cylinder; a spiral plate, the spiral plate being arranged between the bucket cylinder and the center cylinder and being fixedly connected with the bucket cylinder and / or the center cylinder, the spiral plate, the bucket cylinder and the center cylinder forming a spiral flow channel; a cover plate, the cover plate being covered and fixed to the top end of the bucket cylinder and the top end of the center cylinder, the cover plate being fixedly connected with the steel wire rope; a bottom plate, the bottom plate being fixed to the bottom end of the bucket cylinder and the bottom end of the center cylinder.

2. The hoisting apparatus of claim 1, wherein, A raw material input pipe is installed at the fuel element receiving port of the conveying pipe, the raw material input pipe being provided with a new fuel element inlet and a blowing port; a feeding pipe is installed at the fuel element feeding port of the conveying pipe.

3. The hoisting apparatus of claim 1, wherein, The bucket receiving port and the bucket feeding port are arranged in a circumferential direction of the bucket cylinder.

4. The hoisting apparatus of claim 3, wherein, A dust outlet is arranged at a center position of the bottom plate.

5. The hoisting apparatus of claim 3, wherein, A dust tank is further arranged, the dust tank being communicated with the bottom of the conveying pipe through a dust outlet pipe, and the dust tank being provided with a gas outlet.

6. The hoisting apparatus of claim 1, wherein, A buffer device is arranged in the bottom of the conveying pipe, the buffer device being supported by a first detachable device installed at the bottom of the conveying pipe.

7. The hoisting apparatus of claim 1, wherein, The conveying pipe comprises a lifting section and a maintenance section which are detachable, the lifting section and the maintenance section being fixedly connected through a second detachable device, and the lifting section being arranged above the maintenance section.

8. A modular high temperature gas cooled reactor fuel handling system comprising a lifting device, characterised in that, A roller support is fixedly arranged in the conveying pipe, the main shaft being rotatably installed in the roller support, and the main shaft being inserted into the conveying pipe through a power input port of the conveying pipe, the motor being connected with the main shaft through a magnetic transmission device, and the magnetic transmission device being installed at the power input port. The lifting device is the lifting device as claimed in any one of claims 1-7.

Images