Magnetic suspension circulating transportation device for spherical nuclear fuel element

Abstract

The invention discloses a magnetic suspension circulating transportation device for spherical nuclear fuel elements. The magnetic suspension circulating transportation device comprises a closed pressure-bearing shell and a magnetic suspension transmission assembly. The closed pressure-bearing shell comprises a pressure-bearing shell barrel, a pressure-bearing detachable device and a bottom sealing head, the upper part of the pressure-bearing shell barrel is detachably connected with the pressure-bearing detachable device, and the lower part of the pressure-bearing shell barrel is fixedly connected with the bottom sealing head; the magnetic suspension transmission assembly comprises an annular guide rail, a sensing indication feedback system and a plurality of transmission hoppers, the sensing indication feedback system is centrally distributed on the inner side of the annular guide rail, the transmission hoppers are uniformly distributed on the outer side of the annular guide rail, and the transmission hoppers are in magnetic transmission connection with the annular guide rail. The magnetic suspension circulating transportation device for the spherical nuclear fuel element has the beneficial effects that the defects that an existing pneumatic transportation mode is large in energy consumption, pipelines and fuel elements are seriously abraded and damaged, much chippings and dust exist, vibration noise is large, maintenance is inconvenient, and the speed is limited are overcome.

Description

Technical Field

[0001] The invention belongs to the field of nuclear reactor fuel transportation, and in particular relates to a magnetic suspension circulation transportation device for spherical nuclear fuel elements. Background Art

[0002] The invention patent application with publication number CN101432824A and subject name is container loading cover for nuclear fuel assemblies, device for loading nuclear fuel assemblies in transport containers and loading method, and its IPC classification number is G21C19 / 32. Its technical solution discloses "a cover for loading at least one nuclear fuel assembly into a transport container, comprising a main body having a longitudinal axis (X), the main body being capable of sealingly covering the upper end of the container, at least one first hole (10) for allowing the fuel assembly to pass through and at least one retaining device (56). The cover comprises a second hole (14) for allowing a pneumatic tool to pass through and a second shell (94), the pneumatic tool being used to be connected to the container, the second shell (94) being used to receive a second plug (16) when the pneumatic tool is connected, the second plug (16) being used to seal the second hole for connecting the pneumatic tool to the container".

[0003] It can be seen that the technical solution disclosed in the above invention patent application focuses on the pneumatic (air force) method of transporting nuclear fuel assemblies, which has the disadvantages of large power consumption, easy wear of pipelines, easy breakage of spherical fuel elements, generation of debris and dust, difficulty in separation and dust removal, easy blockage of pipelines, low lifting efficiency of spherical nuclear fuel elements, and inconvenient maintenance, and needs to be further improved. Summary of the invention

[0004] The present invention aims at the state of the prior art, overcomes the above defects and provides a magnetic suspension circulation transportation device for spherical nuclear fuel elements.

[0005] The main purpose of the magnetic levitation circulation transportation device for spherical nuclear fuel elements disclosed in the present invention is to be applicable to a pebble bed modular high-temperature gas-cooled reactor, and to solve the shortcomings of the existing pneumatic transportation method, such as high energy consumption, serious wear and tear of pipelines and fuel elements, large amounts of debris and dust, large vibration and noise, inconvenient maintenance, and limited speed.

[0006] Another purpose of the magnetic suspension circulation transportation device for spherical nuclear fuel elements disclosed in the present invention is to avoid the disadvantages of an escalator-type device in which a motor drives a chain transmission, in which the transmission chain wears and stretches during long-term operation, inducing chain shaking and noise.

[0007] The present invention adopts the following technical scheme: a magnetic suspension circulation transportation device for spherical nuclear fuel elements, comprising a closed pressure-bearing shell and a magnetic suspension transmission assembly, wherein:

[0008] The closed pressure-bearing shell includes a pressure-bearing shell body, a pressure-bearing detachable device and a bottom head, the upper part of the pressure-bearing shell body is detachably connected to the pressure-bearing detachable device, and the lower part of the pressure-bearing shell body is fixedly connected to the bottom head;

[0009] The magnetic suspension transmission component includes an annular guide rail, a sensor indication feedback system and a plurality of transmission hoppers. The sensor indication feedback system is centrally distributed on the inner side of the annular guide rail, and the transmission hoppers are evenly distributed on the outer side of the annular guide rail. The transmission hoppers are connected to the annular guide rail by magnetic transmission.

[0010] The magnetic levitation transmission component also includes a ball receiving port and a ball unloading port. The ball receiving port is located below the pressure-bearing shell cylinder and is connected to the pressure-bearing shell cylinder, and the ball receiving port is opposite to the ascending side of the annular guide rail. The ball unloading port is located above the pressure-bearing shell cylinder and is connected to the pressure-bearing shell cylinder, and the ball unloading port is opposite to the descending side of the annular guide rail.

[0011] As a preferred technical solution of the above technical solutions, the magnetic levitation circulation transportation device for spherical nuclear fuel elements also includes a shielding chip collection assembly, the chip outlet is located at the lower part of the bottom head, and the chip outlet is detachably connected to the shielding chip collection assembly.

[0012] As a preferred technical solution of the above technical solutions, the closed pressure-bearing shell also includes two pressure-bearing shell cylinder support devices, which are arranged on both sides of the pressure-bearing shell cylinder, and the pressure-bearing shell cylinder support devices are fixedly connected to the pressure-bearing shell cylinder respectively.

[0013] As a preferred technical solution of the above technical solutions, the pressure-bearing shell cylinder support device is welded to the pressure-bearing shell cylinder.

[0014] As a preferred technical solution of the above technical solutions, the pressure shell cylinder support device is an L-shaped support plate.

[0015] As a preferred technical solution of the above technical solutions, the magnetic levitation transmission component also includes a magnetic levitation transmission component fixing mechanism, which is built into the pressure shell cylinder and fixedly connected to the annular guide rail.

[0016] As a preferred technical solution of the above technical solutions, the annular guide rail is an electromagnetic or permanent magnetic suspension non-contact guide rail, and the transmission hopper can be suspended on the annular guide rail and move freely along the annular guide rail.

[0017] As a preferred technical solution of the above technical solutions, electromagnetic force is used to provide power to push the transfer hopper and the spherical nuclear fuel elements contained therein to move cyclically along the annular guide rail.

[0018] As the preferred technical solution of the above technical solutions, the sensor indication feedback system includes a position sensor and an air gap sensor, which are used to monitor and adjust the magnetic suspension air gap distance of the transmission hopper in real time, and monitor and adjust the moving speed and position of the transmission hopper in real time, so as to ensure the transportation rhythm and precise positioning of the spherical nuclear fuel elements.

[0019] As a preferred technical solution of the above technical solutions, the ball receiving port is opened upward, forms an inclined angle with the pressure-bearing shell cylinder, and is welded to the lower part of the pressure-bearing shell cylinder.

[0020] As a preferred technical solution of the above technical solutions, the ball unloading port is opened downward, forms an inclined angle with the pressure-bearing shell cylinder, and is welded to the upper part of the pressure-bearing shell cylinder.

[0021] As a preferred technical solution of the above technical solutions, the transmission hopper is provided with a hollow structure.

[0022] The magnetic suspension circulation transport device for spherical nuclear fuel elements disclosed in the present invention has the following beneficial effects:

[0023] 1. It solves the shortcomings of existing pneumatic conveying methods, such as high energy consumption, serious wear and tear of pipelines and fuel elements, large amounts of debris and dust, high vibration and noise, inconvenient maintenance, and limited speed.

[0024] 2. It avoids the wear and elongation of the transmission chain in the chain transmission method during long-term operation, which may cause defects such as chain jitter and noise.

[0025] 3. Make full use of the characteristics of magnetic levitation contactless operation, get rid of the lubrication pain point, avoid the use of expensive oil-free lubrication chains, avoid downtime caused by chain replacement, shorten the maintenance cycle of the device, truly realize long-life operation, and can meet the use of the entire high-temperature gas-cooled reactor life cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the spherical nuclear fuel element of the present invention.

[0027] Figure 2 It is a structural schematic diagram of the ball receiving port of the present invention.

[0028] Figure 3 It is a structural schematic diagram of the ball unloading port of the present invention.

[0029] The reference numerals include: 1-pressure shell cylinder; 2-ball receiving port; 3-transmission hopper; 4-annular guide rail; 5-pressure-bearing detachable device; 6-magnetic levitation transmission component fixing mechanism; 7-ball unloading port; 8-pressure shell cylinder supporting device; 9-sensing indication feedback system; 10-bottom head; 11-chip outlet; 101-spherical nuclear fuel element; 200-sealed pressure shell; 300-magnetic levitation transmission component; 400-shielded chip collection component. DETAILED DESCRIPTION

[0030] The present invention discloses a magnetic suspension circulation transport device for spherical nuclear fuel elements. Figures 1 to 3 , the specific implementation modes of the present invention are further described.

[0031] See attached figure Figures 1 to 3 , Figure 1 It shows how to receive the spherical nuclear fuel element 101, Figure 2 The relevant structure at the ball receiving port 2 is shown. Figure 3 The relevant structure at the ball unloading port 7 is shown.

[0032] Example 1.

[0033] Preferably, the magnetic suspension circulation transport device for spherical nuclear fuel elements comprises a (vertically arranged) closed pressure-bearing shell 200 and a (vertically arranged) magnetic suspension transport assembly 300, wherein:

[0034] The sealed pressure-bearing shell 200 includes a pressure-bearing shell cylinder 1, a pressure-bearing detachable device 5 and a bottom head 10. The upper part of the pressure-bearing shell cylinder 1 is detachably connected to the pressure-bearing detachable device 5 (located at the top), and the lower part of the pressure-bearing shell cylinder 1 is fixedly connected to the bottom head 10, providing a pressure-bearing boundary for the entire device.

[0035] The magnetic suspension transmission assembly 300 includes an annular guide rail 4, a sensor indication feedback system 9 and a plurality of transmission hoppers 3. The sensor indication feedback system 9 is centrally distributed on the inner side of the annular guide rail 4, and the transmission hoppers 3 are evenly distributed on the outer side of the annular guide rail 4. The transmission hoppers 3 are magnetically connected to the annular guide rail 4 so that the transmission hoppers 3 reciprocate along the annular guide rail 4 so that the spherical nuclear fuel elements 101 built into the transmission hoppers 3 are transported from the ball receiving port 2 to the ball unloading port 7. The reciprocating motion of the transmission hoppers 3 along the annular guide rail 4 is monitored in real time and controlled by the sensor indication feedback system 9.

[0036] The magnetic levitation transmission component 300 also includes a ball receiving port 2 and a ball unloading port 7. The ball receiving port 2 is located below the pressure-bearing shell cylinder 1 and is connected to the pressure-bearing shell cylinder 1. The ball receiving port 2 is opposite to the ascending side of the annular guide rail 4. The ball unloading port 7 is located above the pressure-bearing shell cylinder 1 and is connected to the pressure-bearing shell cylinder 1. The ball unloading port 7 is opposite to the descending side of the annular guide rail 4.

[0037] The upper part of the pressure-bearing shell cylinder 1 and the pressure-bearing detachable device 5 (located at the top) are preferably connected by screws, and the lower part of the pressure-bearing shell cylinder 1 and the bottom head 10 are preferably connected by welding.

[0038] Among them, the magnetic levitation circulation transportation device for spherical nuclear fuel elements also includes a shielded chip collection assembly 400, and the chip outlet 11 is located at the lower part of the bottom head 10. The chip outlet 11 is detachably connected to the shielded chip collection assembly 400 to form a channel for broken balls, debris, and dust to enter the shielded chip collection assembly 400.

[0039] The sealed pressure-bearing shell 200 further includes two pressure-bearing shell cylinder supporting devices 8 , which are disposed on both sides of the pressure-bearing shell cylinder 1 , and are fixedly connected to the pressure-bearing shell cylinder 1 , respectively.

[0040] The pressure-bearing shell cylinder supporting device 8 is preferably connected to the pressure-bearing shell cylinder 1 by welding.

[0041] Among them, the pressure shell cylinder supporting device 8 is preferably an L-shaped supporting piece.

[0042] The magnetic suspension transmission component 300 further includes a magnetic suspension transmission component fixing mechanism 6, which is built into the pressure-bearing shell cylinder 1 and fixedly connected to the annular guide rail 4, and plays a fixing role on the annular guide rail 4 and other structures. When necessary, the pressure-bearing detachable device 5 can be opened, and then the magnetic suspension transmission component 300 can be pulled out from the sealed pressure-bearing shell 200 through the magnetic suspension transmission component fixing mechanism 6.

[0043] The transport hopper 3 is used as a carrier for transporting the spherical nuclear fuel elements 101 , and preferably a coil and a permanent magnet are used in combination to magnetically drive the transport hopper 3 .

[0044] The annular guide rail 4 is preferably an electromagnetic or permanent magnetic suspension non-contact guide rail, and the transmission hopper 3 can be suspended on the annular guide rail 4 and move freely along the annular guide rail 4 .

[0045] The electromagnetic force provides power to push the transfer hopper 3 and the spherical nuclear fuel elements 101 contained therein to move cyclically along the annular guide rail 4 .

[0046] As a preferred technical solution of the above technical solutions, the sensor indication feedback system 9 includes a position sensor and an air gap sensor, which are used to monitor and adjust the magnetic suspension air gap distance of the transmission hopper 3 in real time, and monitor and adjust the moving speed and position of the transmission hopper 3 in real time, to ensure the transportation rhythm and precise positioning of the spherical nuclear fuel elements 101.

[0047] Among them, the sensor indication feedback system 9 can monitor the real-time position of the transmission hopper 3 in real time, so as to reflect the real-time position of the spherical nuclear fuel element 101, thereby controlling the start and stop of the transmission hopper 3.

[0048] The ball receiving port 2 preferably opens upward, forms an inclined angle with the pressure-bearing shell cylinder 1, and is welded to the lower part of the pressure-bearing shell cylinder 1. Figure 2 .

[0049] The ball discharge port 7 preferably opens downward, forms an inclined angle with the pressure-bearing shell cylinder 1, and is welded to the upper part of the pressure-bearing shell cylinder 1. Figure 3 .

[0050] The bottom head 10 is preferably spherical or conical in shape so as to collect debris and dust.

[0051] The transmission hopper 3 is preferably provided with a hollow structure so that debris and dust can naturally fall from the hollow structure during the rising process of the transmission hopper 3 .

[0052] Among them, the coil is preferably made of high temperature and radiation resistant ceramic coil, the permanent magnet is preferably made of high temperature and radiation resistant samarium cobalt permanent magnet material, and the wire is preferably made of mineral insulated cable, so as to operate normally under high temperature, high pressure and strong radiation conditions.

[0053] The working principle of the magnetic suspension circulation transportation device for spherical nuclear fuel elements disclosed in this embodiment is explained below.

[0054] Specifically, the spherical nuclear fuel element 101 discharged from the core unloading device enters the ball receiving port 2 at the bottom of the closed pressure shell under the action of gravity flow. The spherical nuclear fuel element 101 is suspended on the annular guide rail 4. The transmission hopper 3 lifts the spherical nuclear fuel element 101 to the top loading position, so that the spherical nuclear fuel element 101 is discharged from the ball unloading port 7 to be sent to the core. The above process is repeated to achieve sealed continuous loading.

[0055] The following describes the technical features of the magnetic levitation circulation transportation device for spherical nuclear fuel elements disclosed in this embodiment.

[0056] 1. The power consumption is significantly lower than that of pneumatic conveying;

[0057] 2. Continuously transport in a closed manner and maintain working pressure to prevent the escape of radioactive dust;

[0058] 3. Resistant to high temperature, high pressure and strong radiation, stable operation, avoiding collision between pneumatically transported fuel elements and pipeline walls, reducing vibration and noise;

[0059] 4. Reduce damage to fuel elements and reduce the generation of debris and dust;

[0060] 5. The hollow design of the hopper can leak out the debris and dust flowing out of the core, reducing the separation and dust removal work;

[0061] 6. Substantial reduction in dust can avoid system blockage;

[0062] 7. It can realize continuous multi-ball lifting and improve the circulation speed;

[0063] 5. Shorten the maintenance cycle and facilitate maintenance;

[0064] 6. There is no bearing or chain structure, which avoids the problem of high friction coefficient in harsh environments and improves system reliability and life.

[0065] It is worth mentioning that the specific components and other technical features of the spherical nuclear fuel element 101 involved in the patent application of the present invention should be regarded as the prior art. The specific structure, working principle and possible control method and spatial arrangement method of these technical features can be selected by conventional methods in the field, and should not be regarded as the inventive point of the patent of the present invention. The patent of the present invention will not be further elaborated.

[0066] For those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A magnetic suspension circulation transport device for spherical nuclear fuel elements, characterized in that: It includes a sealed pressure-bearing shell and a magnetic suspension transmission component, wherein: The closed pressure-bearing shell includes a pressure-bearing shell body, a pressure-bearing detachable device and a bottom head, the upper part of the pressure-bearing shell body is detachably connected to the pressure-bearing detachable device, and the lower part of the pressure-bearing shell body is fixedly connected to the bottom head; The magnetic suspension transmission component includes an annular guide rail, a sensor indication feedback system and a plurality of transmission hoppers. The sensor indication feedback system is centrally distributed on the inner side of the annular guide rail, and the transmission hoppers are evenly distributed on the outer side of the annular guide rail. The transmission hoppers are connected to the annular guide rail by magnetic transmission. The magnetic levitation transmission component also includes a ball receiving port and a ball unloading port. The ball receiving port is located below the pressure-bearing shell cylinder and is connected to the pressure-bearing shell cylinder, and the ball receiving port is opposite to the ascending side of the annular guide rail. The ball unloading port is located above the pressure-bearing shell cylinder and is connected to the pressure-bearing shell cylinder, and the ball unloading port is opposite to the descending side of the annular guide rail.

2. The magnetic suspension circulation transportation device for spherical nuclear fuel elements according to claim 1 is characterized in that: The magnetic suspension circulation transport device for spherical nuclear fuel elements also includes a shielding chip collection assembly, a chip outlet is located at the lower part of the bottom head, and the chip outlet is detachably connected to the shielding chip collection assembly.

3. The magnetic suspension circulation transportation device for spherical nuclear fuel elements according to claim 1 is characterized in that: The closed pressure-bearing shell also includes two pressure-bearing shell cylinder supporting devices, which are respectively arranged on both sides of the pressure-bearing shell cylinder, and the pressure-bearing shell cylinder supporting devices are respectively fixedly connected to the pressure-bearing shell cylinder.

4. The magnetic suspension circulation transportation device for spherical nuclear fuel elements according to claim 3 is characterized in that: The pressure-bearing shell cylinder supporting device is welded to the pressure-bearing shell cylinder.

5. The magnetic suspension circulation transportation device for spherical nuclear fuel elements according to claim 3 is characterized in that: The pressure shell cylinder supporting device is an L-shaped supporting piece.

6. The magnetic suspension circulation transportation device for spherical nuclear fuel elements according to claim 1, characterized in that: The magnetic suspension transmission component also includes a magnetic suspension transmission component fixing mechanism, which is built into the pressure-bearing shell cylinder and fixedly connected to the annular guide rail.

7. The magnetic suspension circulation transportation device for spherical nuclear fuel elements according to claim 1 is characterized in that: The annular guide rail is an electromagnetic or permanent magnetic suspension non-contact guide rail, and the transmission hopper can be suspended on the annular guide rail and move freely along the annular guide rail.

8. The magnetic suspension circulation transportation device for spherical nuclear fuel elements according to claim 7 is characterized in that: The electromagnetic force provides power to push the transfer hopper and the spherical nuclear fuel elements it contains to move cyclically along the annular guide rail.

9. The magnetic suspension circulation transportation device for spherical nuclear fuel elements according to claim 7, characterized in that: The sensing indication feedback system includes a position sensor and an air gap sensor, which are used to monitor and adjust the magnetic suspension air gap distance of the transmission hopper in real time, and to monitor and adjust the moving speed and position of the transmission hopper in real time, so as to ensure the transportation rhythm and precise positioning of the spherical nuclear fuel elements.

10. The magnetic suspension circulation transportation device for spherical nuclear fuel elements according to claim 1, characterized in that: The ball receiving port is opened upward, forms an inclined angle with the pressure-bearing shell cylinder, and is welded to the lower part of the pressure-bearing shell cylinder.

11. The magnetic suspension circulation transportation device for spherical nuclear fuel elements according to claim 1, characterized in that: The ball unloading port is opened downward, forms an inclined angle with the pressure-bearing shell cylinder, and is welded to the upper part of the pressure-bearing shell cylinder.

12. The magnetic suspension circulation transportation device for spherical nuclear fuel elements according to claim 1, characterized in that: The transmission hopper is provided with a hollow structure.

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