Special jam releasing device for high-temperature gas cooled reactor fuel transportation pipeline

Abstract

The invention relates to the technical field of fuel loading and unloading and storage system maintenance, in particular to a special jam releasing device for a high-temperature gas cooled reactor fuel transportation pipeline, which comprises a deep unit, the lower end of the deep unit comprises a screw-in part, the middle of the deep unit comprises a plurality of dredging parts, the screw-in part can penetrate through a fuel gap, and the adjacent dredging parts can move relatively. According to the special jam releasing device for the high-temperature gas cooled reactor fuel conveying pipeline, when the deep unit goes deep into the conveying pipeline for dredging, the dredging parts can make contact with a fuel ball in the conveying pipeline along with the deep of the screwing-in part, and when the screwing-in part moves to a blocked part, the deep unit is pulled to dredge the fuel ball in the conveying pipeline; by arranging the dredging parts, the multiple dredging parts can drive the multiple blocked fuel balls to move up and down, the distance between every two adjacent fuel balls is increased, and therefore the blocked parts are relieved and smoothly pass through a conveying pipeline.

Description

Technical Field

[0001] The invention relates to the technical field of fuel loading and unloading and storage system maintenance, and in particular to a special jam-releasing device for a high-temperature gas-cooled reactor fuel transportation pipeline. Background Art

[0002] The pebble bed high temperature gas-cooled reactor is an advanced nuclear reactor with good inherent safety and can be used for efficient power generation and high temperature heating. The high temperature gas-cooled reactor uses spherical fuel elements based on graphite, which are brittle and hard. During the transportation of fuel elements, due to friction and collision between balls and between balls and steel materials, dust and debris are easily generated, which in turn causes fuel damage and equipment jamming failures.

[0003] Since the fuel loading and unloading system of the high temperature gas-cooled reactor uses a large number of non-standard equipment, and its loading and unloading process is completely different from that of the mature pressurized water reactor, there is currently no effective means to solve the potential fuel ball jamming problem in the pebble bed type high temperature reactor loading and unloading system. In order to solve this technical problem and avoid the serious consequences such as system shutdown and reactor shutdown caused by the jamming of nuclear fuel balls in the loading and unloading system, the present invention provides a special jamming device for the fuel transportation pipeline of the high temperature gas-cooled reactor. Summary of the invention

[0004] In view of the above-mentioned problems existing in the existing high temperature gas-cooled reactor fuel transportation pipeline, the present invention is proposed.

[0005] Therefore, the purpose of the present invention is to provide a special jamming release device for a high temperature gas-cooled reactor fuel transportation pipeline, the purpose of which is to effectively deal with the potential fuel ball jamming problem in the unloading system.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a special unjamming device for a high-temperature gas-cooled reactor fuel transport pipeline, comprising a penetration unit, a screw-in portion at its lower end, a middle portion comprising a plurality of dredging portions, the screw-in portion being able to pass through a fuel gap, and adjacent dredging portions being able to undergo relative movement.

[0007] As a preferred solution of the special jam-releasing device for high temperature gas-cooled reactor fuel transportation pipeline of the present invention, wherein: the dredging portion includes an annular edge,

[0008] Two adjacent annular edges are connected by an elastic member;

[0009] Alternatively, the annular edges are provided with breakouts and are bent in opposite directions to be connected to adjacent annular edges.

[0010] As a preferred solution of the special jam-releasing device for high temperature gas-cooled reactor fuel transport pipeline of the present invention, the end of the screw-in portion is of a release type, that is, it includes a circular ring;

[0011] The circular ring is provided with a fracture, and one end is connected to the annular edge.

[0012] As a preferred solution of the special unjamming device for high-temperature gas-cooled reactor fuel transportation pipeline of the present invention, the end of the screw-in part is a closed type, that is, it includes multiple circular rings with gradually decreasing inner diameters and connected together, among which the circular ring with the largest inner diameter is connected to the annular edge.

[0013] As a preferred solution of the special jamming release device for high temperature gas-cooled reactor fuel transportation pipeline of the present invention, the upper end of the deep-reaching unit also includes a handle.

[0014] The beneficial effects of the present invention are as follows: when the deep-drilling unit is inserted deep into the interior of the transport pipeline for dredging, as the screw-in portion goes deeper, multiple dredging portions will come into contact with the fuel balls inside the transport pipeline; when the screw-in portion moves to the blocked portion, the deep-drilling unit is pulled out, so that the multiple dredging portions can drive multiple blocked fuel balls to move up and down, increasing the distance between each other, thereby alleviating the blockage and allowing the fuel balls to pass through the transport pipeline smoothly; and by changing the parameters of the deep-drilling unit, appropriate elasticity and rigidity can be provided to ensure smooth dredging of the blocked fuel balls. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the special jam-releasing device for high-temperature gas-cooled reactor fuel transportation pipeline of the present invention.

[0017] Figure 2 It is a schematic structural diagram of the dredging portion of the special jam-releasing device for high-temperature gas-cooled reactor fuel transportation pipeline of the present invention.

[0018] Figure 3 It is a structural schematic diagram of the screw-in part of the special jam-releasing device for high-temperature gas-cooled reactor fuel transportation pipeline of the present invention. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0020] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0021] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0022] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0023] Example 1, reference Figure 1 and Figure 2 , which is the first embodiment of the present invention, provides a special unblocking device for a high-temperature gas-cooled reactor fuel transportation pipeline, the device includes a deep unit 100, the lower end of which includes a screw-in portion 102, the middle portion of which includes a plurality of dredging portions 103, the screw-in portion 102 can pass through the fuel gap, and adjacent dredging portions 103 can move relative to each other.

[0024] The screw-in portion 102 can pass through the blocked fuel balls, driving the dredging portion 103 to enter the dredging pipeline, and the dredging portion 103 contacts the fuel balls. Multiple dredging portions 103 contact multiple fuel balls respectively. When the dredging portion 103 is pulled out, it will drive the fuel balls to swing up and down synchronously, thereby increasing the gap between the fuel balls, alleviating the blockage and ensuring that the fuel balls can pass through the transport pipeline.

[0025] The further dredging portion 103 includes an annular edge 103a,

[0026] Two adjacent annular edges 103a are connected via an elastic member; the elastic member may be connected by a spring.

[0027] Alternatively, the annular edge 103a is provided with a break, and is bent in opposite directions to connect with adjacent annular edges 103a, and the whole is in a spring shape, and a spring shape is preferably adopted.

[0028] Example 2, reference Figure 2 and Figure 3, which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that the end of the screw-in portion 102 is of a release type; that is, it includes a ring 102a;

[0029] The circular ring 102a is provided with a break, and one end is connected to the annular edge 103a; the other end is bent in the opposite direction and is screwed into the fuel ball through the screw-in portion 102 and sleeved on the outside of the fuel ball.

[0030] This implementation method is suitable for large-diameter transport pipelines.

[0031] The specifications of the special unblocking tool (preferably spring-shaped) for large-diameter fuel transportation pipelines are as follows:

[0032]

[0033]

[0034] The above technical parameters can provide appropriate elasticity and rigidity to ensure smooth unblocking of the stuck fuel ball equipment.

[0035] The preferred specifications of the special jamming release tool for large-diameter fuel transportation pipelines are 100mm outer diameter, 8 or 10mm wire diameter, and 85mm pitch.

[0036] Alternatively, the end of the screw-in portion 102 is of a closed type, that is, it includes a plurality of circular rings 102a with gradually decreasing inner diameters and connected together, wherein the circular ring 102a with the largest inner diameter is connected to the annular edge 103a.

[0037] This embodiment is suitable for small-diameter transport pipelines, and the screw-in portion 102 penetrates the gaps between the fuel balls to penetrate deeper.

[0038] Furthermore, the upper end of the deepening unit 100 also includes a handle to facilitate controlling the deepening unit 100 to work.

[0039] The specifications of the special unblocking tool (preferably spring-shaped) for small-diameter fuel transportation pipelines are as follows:

[0040] Serial number Outer diameter / mm Wire diameter / mm end 1 45 6 Tighten the ends 2 40 6 Tighten the ends 3 35 6 Tighten the ends 4 35 5 Tighten the ends 5 45 6 Ends not tight 6 35 5 Tighten the ends

[0041] The above technical parameters can provide appropriate elasticity and rigidity to ensure smooth unblocking of the stuck fuel ball equipment.

[0042] Among them, the preferred specifications of the special jamming release tool for small-diameter fuel transportation pipelines are an outer diameter of 45mm, a wire diameter of 6mm, and the ends are tightly closed.

[0043] The remaining structure is the same as that of Example 2.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A special jam-releasing device for high temperature gas-cooled reactor fuel transport pipeline, characterized in that: include, The penetration unit (100) comprises a screw-in portion (102) at its lower end, wherein the middle portion comprises a plurality of dredging portions (103), wherein the screw-in portion (102) can pass through the fuel gap, and adjacent dredging portions (103) can move relative to each other.

2. The special jam-releasing device for high temperature gas-cooled reactor fuel transportation pipeline according to claim 1 is characterized in that: The dredging portion (103) comprises an annular edge (103a), Two adjacent annular edges (103a) are connected via an elastic member; Alternatively, the annular edges (103a) are provided with breaks and are bent in opposite directions to connect with adjacent annular edges (103a).

3. The special jam-releasing device for high temperature gas-cooled reactor fuel transportation pipeline according to claim 1 or 2, characterized in that: The end of the screw-in portion (102) is of a release type; that is, it includes a circular ring (102a); The circular ring (102a) is provided with a fracture, and one end is connected to the annular edge (103a).

4. The special jam-releasing device for high temperature gas-cooled reactor fuel transportation pipeline according to claim 1 or 2, characterized in that: The end of the screw-in portion (102) is of a closed type, that is, it comprises a plurality of circular rings (102a) with gradually decreasing inner diameters and connected together, wherein the circular ring (102a) with the largest inner diameter is connected to the annular edge (103a).

5. The special jam-releasing device for high temperature gas-cooled reactor fuel transportation pipeline according to claim 4 is characterized in that: The upper end of the penetration unit (100) further comprises a handle.

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