A secondary buffer bracket for nuclear fuel transport container

Abstract

The present invention relates to the field of mechanical manufacturing, and in particular to a secondary buffer bracket for a nuclear fuel transport container. The secondary buffer bracket includes: two first bracket units, a second bracket unit is arranged between the two first bracket units, the first bracket unit and the second bracket unit are fastened together, the first bracket unit includes: a frame composed of a first end beam and a first side beam, ribs, a secondary buffer and a slot; the second bracket unit includes: a frame composed of a second end beam and a second side beam, ribs and a slot. The secondary buffer bracket can provide a buffering effect with good shock absorption effect, and can prevent the fuel assembly accelerometer from jumping off when the train accelerates, brakes, or collides during marshaling connection. Under normal operating conditions of the train, the acceleration of the nuclear fuel assembly does not exceed 1.5G, ensuring the stability of the nuclear fuel transport container and the safety of nuclear fuel assembly transportation.

Description

Technical Field

[0001] The invention relates to the field of mechanical manufacturing, and in particular to a secondary buffer bracket of a nuclear fuel transport container. Background Art

[0002] The VVER nuclear power unit uses TVS-2M nuclear fuel assemblies, each of which is a regular hexagonal structure. A single transport container is made of two cylindrical structures welded together to accommodate two sets of assemblies. The interior of the transport container is fixed with wooden inserts and has no additional buffer devices. Accelerometers are installed at both ends of the exterior of the nuclear fuel transport container, and the acceleration limit involved is 4G.

[0003] At present, nuclear fuel assemblies need to be transported by rail. During rail transportation, when the train accelerates or brakes, collisions are prone to occur. The nuclear fuel transport container itself cannot ensure that the fuel and speed are within the limit range, so it is easy to damage the nuclear fuel assemblies. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a secondary buffer bracket for a nuclear fuel transport container, which is suitable for railway transportation and ensures the stability of the nuclear fuel transport container and the safety of nuclear fuel assembly transportation.

[0005] The present invention provides a secondary buffer bracket for a nuclear fuel transport container, comprising two first bracket units, a second bracket unit being arranged between the two first bracket units, the first bracket unit being tightly connected to the second bracket unit, the first bracket unit comprising: a frame composed of a first end beam (1) and a first side beam (2), a first rib (3) being parallel to the first end beam (1), and having two ends fixed to the first side beam (2); a second rib (4) being parallel to the first side beam (2), and having two ends fixed to the first end beam (1);

[0006] A secondary buffer (5) is provided at the four top corners of the frame. The secondary buffer (5) is clamped with a stopper iron (6) and the first end beam (1). The stopper iron (6) is parallel to the first end beam (1), and the two ends of the stopper iron (6) are fixed to the first side beam (2) and the second rib (4).

[0007] The lower part of the secondary buffer (5) is fixed on the base (7).

[0008] The frame and the base (7) are overlapped via a friction plate (8);

[0009] A first end stop (9) is parallel to and close to the first end beam (1), the two ends of the first end stop (9) are fixed on the first side beam (2), the first end stop (9) and the side stop (10) and the mounting plate (11) form a slot; the slots are symmetrically arranged and are at least four in number;

[0010] The second bracket unit comprises:

[0011] A frame composed of a second end beam (1') and a second side beam (2');

[0012] The third rib (3') is parallel to the second end beam (1'), and its two ends are fixed to the second side beam (2'); the fourth rib (4') is parallel to the second side beam (2'), and its two ends are fixed to the second end beam (1');

[0013] The second end block (9') is parallel to and close to the second end beam (1'); the two ends of the second end block (9') are fixed on the second side beam (2'); the second end block (9') forms a slot with the side block (10) and the mounting plate (11); the slots are symmetrically arranged and there are at least four of them.

[0014] Preferably, the number of the first ribs (3) is 2 and they are evenly distributed in the frame; the number of the second ribs (4) is 3 and they are evenly distributed in the frame;

[0015] There are two third ribs (3') evenly distributed in the frame; there are three fourth ribs (4') evenly distributed in the frame.

[0016] Preferably, a support leg (12) is fixed on the second central rib.

[0017] Preferably, it also comprises: a bolt hook (13) arranged on both ends of the first side beam (2).

[0018] Preferably, it also includes: hanging screws (14) symmetrically arranged on the first side beam (2).

[0019] Preferably, four second end blocks (9') are arranged in the second bracket unit, of which two second end blocks (9') are respectively close to the second end beam (1'), two second end blocks (9') are arranged in the middle of the frame, and the two second end blocks (9') arranged in the middle form a slot with the side block (10) and the mounting plate (11); there are two slots, which are symmetrically arranged.

[0020] Preferably, the first bracket unit is provided with two pairs of card slots, and the second bracket unit is provided with three pairs of card slots.

[0021] Preferably, the slot matches the base size of the nuclear fuel transport container.

[0022] Preferably, the first bracket unit is limited vertically and laterally by a base (7) and a secondary buffer (5).

[0023] Compared with the prior art, the secondary buffer bracket of the nuclear fuel transport container of the present invention is suitable for the TVS-2M nuclear fuel transport container. The secondary buffer bracket can provide a buffering effect with good shock absorption effect, and prevent the fuel assembly accelerometer from jumping off when the train accelerates, brakes, and marshaling and connecting collides. Under normal operating conditions of the train, the acceleration of the nuclear fuel assembly does not exceed 1.5G, ensuring the stability of the nuclear fuel transport container and the safety of nuclear fuel assembly transportation. Secondly, the secondary buffer bracket has multiple card slots to meet the combined transportation requirements of different numbers of nuclear fuel transport containers. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram showing the structure of a secondary buffer bracket of a nuclear fuel transport container of the present invention;

[0025] Figure 2 A schematic diagram showing the structure of a first bracket unit of the present invention;

[0026] Figure 3 A cross-sectional view along the AA direction in the first bracket unit of the present invention is shown;

[0027] Figure 4 A side view showing a first bracket unit side beam of the present invention;

[0028] Figure 5 A side view showing the end beam of the first bracket unit of the present invention;

[0029] Figure 6 A side view showing a stacked secondary buffer bracket of the present invention;

[0030] Legend:

[0031] 1 is the first end beam, 2 is the first side beam, 3 is the first rib, 4 is the second rib, 5 is the secondary buffer, 6 is the stopper, 7 is the base, 8 is the friction plate, 9 is the first end stop, 10 is the side stop, 11 is the mounting plate, 12 is the support leg, 13 is the bolt hook, 14 is the lifting screw; 15 is the nuclear fuel transport container;

[0032] 1' is the second end beam, 2' is the second side beam, 3' is the third rib, 4' is the fourth rib, and 9' is the second end stop. DETAILED DESCRIPTION

[0033] In order to further understand the present invention, the embodiments of the present invention are described below in conjunction with examples, but it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the present invention.

[0034] Reference Figure 1 The embodiment of the present invention discloses a secondary buffer bracket of a nuclear fuel transport container, comprising two first bracket units, a second bracket unit is arranged between the two first bracket units, the first bracket unit and the second bracket unit are tightly connected, the first bracket unit comprises: a frame composed of a first end beam (1) and a first side beam (2), a first rib (3) parallel to the first end beam (1), and its two ends are fixed to the first side beam (2); a second rib (4) parallel to the first side beam (2), and its two ends are fixed to the first end beam (1);

[0035] A secondary buffer (5) is provided at the four top corners of the frame. The secondary buffer (5) is clamped with a stopper iron (6) and the first end beam (1). The stopper iron (6) is parallel to the first end beam (1), and the two ends of the stopper iron (6) are fixed to the first side beam (2) and the second rib (4).

[0036] The lower part of the secondary buffer (5) is fixed on the base (7).

[0037] The frame and the base (7) are overlapped via a friction plate (8);

[0038] A first end stop (9) is parallel to and close to the first end beam (1), the two ends of the first end stop (9) are fixed on the first side beam (2), the first end stop (9) and the side stop (10) and the mounting plate (11) form a slot; the slots are symmetrically arranged and are at least four in number;

[0039] The second bracket unit comprises:

[0040] a frame composed of a second end beam (1') and a second side beam (2'); a third rib (3') parallel to the second end beam (1'), and having two ends fixed to the second side beam (2'); a fourth rib (4') parallel to the second side beam (2'), and having two ends fixed to the second end beam (1');

[0041] The second end block (9') is parallel to and close to the second end beam (1'); the two ends of the second end block (9') are fixed on the second side beam (2'); the second end block (9') forms a slot with the side block (10) and the mounting plate (11); the slots are symmetrically arranged and there are at least four of them.

[0042] According to the present invention, the secondary buffer bracket of the nuclear fuel transport container is matched with the transport railway car, and includes two first bracket units, a second bracket unit is arranged between the two first bracket units, and the first bracket unit is fastened to the second bracket unit. Preferably, the three bracket units are fastened together longitudinally by fastening bolts, or are tightly connected by screws.

[0043] The structure of the first bracket unit is specifically referred to in Figure 2 , comprising: a frame composed of a first end beam (1) and a first side beam (2), a first rib (3) parallel to the first end beam (1), and having two ends fixed to the first side beam (2); a second rib (4) parallel to the first side beam (2), and having two ends fixed to the first end beam (1). The first rib and the second rib are both used to reinforce the main structure of the frame.

[0044] Preferably, there are two first ribs (3) evenly distributed in the frame, that is, the same side ports of the two first ribs divide the first side beam (2) into three equal parts.

[0045] There are three second ribs (4) evenly distributed in the frame, that is, the same side ports of the three second ribs divide the first end beam (1) into four equal parts.

[0046] More preferably, a support leg (12) is fixed on the second central rib. The support leg (12) is used to fix other secondary buffer supports when not carrying a nuclear fuel transport container.

[0047] According to the present invention, secondary buffers (5) are provided at the four top corners of the frame. The secondary buffers (5) are clamped with the first end beam (1) by means of a stop iron (6). The stop iron (6) is parallel to the first end beam (1), and the two ends of the stop iron (6) are fixed to the first side beam (2) and the second rib (4).

[0048] The cross-sectional view along the AA direction in the first bracket unit is as follows: Figure 3 The lower part of the secondary buffer (5) is fixed on the base (7).

[0049] The frame and the base (7) are overlapped via a friction plate (8).

[0050] Preferably, the first bracket unit is limited vertically and laterally by a base (7) and a secondary buffer (5).

[0051] The first end stop (9) is parallel to and close to the first end beam (1), the two ends of the first end stop (9) are fixed on the first side beam (2), and the first end stop (9) and the side stop (10) and the mounting plate (11) form a slot; the slots are symmetrically arranged and there are at least four of them.

[0052] The first end rails (9) are two and are respectively close to the first end beams (1) at both ends. The first end rails (9) are higher than the secondary buffer, and both ends are fixed on the first side beams (2).

[0053] Preferably, the card slots are evenly arranged on both sides of the frame. The card slots are symmetrically arranged, and there are at least four of them.

[0054] Preferably, the first bracket unit is provided with two pairs of card slots, that is, four card slots.

[0055] Preferably, the secondary buffer bracket of the nuclear fuel transport container further comprises: bolt hooks (13) arranged on both ends of the first side beam (2).

[0056] Preferably, the secondary buffer bracket of the nuclear fuel transport container further comprises lifting screws (14) symmetrically arranged on the first side beam (2). The lifting screws are used to lift and install the bracket.

[0057] The side view of the first bracket unit side beam is as follows Figure 4 As shown, the side view at the end beam is as follows Figure 5 shown.

[0058] According to the present invention, the structure and size of the second bracket unit are consistent with those of the first bracket unit, and no secondary buffer is provided. Specifically, the second bracket unit comprises: a frame composed of a second end beam (1') and a second side beam (2'); a third rib (3') parallel to the second end beam (1'), and its two ends are fixed to the second side beam (2'); a fourth rib (4') parallel to the second side beam (2'), and its two ends are fixed to the second end beam (1');

[0059] The second end stop (9') is parallel to and close to the second end beam (1'), the two ends of the second end stop (9') are fixed on the second side beam (2'), the second end stop (9') and the side stop (10) and the mounting plate (11) form a slot; the slots are symmetrically arranged and are at least four in number. Preferably, the number of the slots close to the second end beam (1') is four.

[0060] Preferably, there are two third ribs (3') evenly distributed in the frame; and there are three fourth ribs (4') evenly distributed in the frame.

[0061] Preferably, four second end stops (9') are provided, of which two second end stops (9') are respectively close to the second end beam (1'), two second end stops (9') are provided in the middle of the frame, and the two second end stops (9') provided in the middle form a slot with the side stop (10) and the mounting plate (11); the slots are two and are symmetrically arranged.

[0062] That is, the second bracket unit is provided with three pairs of card slots.

[0063] According to the present invention, preferably, the slot matches the base size of the nuclear fuel transport container.

[0064] In the present invention, the secondary buffer bracket can be stacked in two layers when placed, and the two layers of brackets are separated by a double-layer positioning bracket. The fastening device of the nuclear fuel transport container is tightened and connected with the bolt hook to ensure that the nuclear fuel transport container is placed firmly. Figure 6 shown.

[0065] During the operation of the train, when the train accelerates, brakes, or collides with the train set, the frame slides longitudinally on the friction plate of the base, and the secondary buffer plays a buffering role, so that the accelerometer of the nuclear fuel assembly does not jump off, thereby ensuring the stability of the nuclear fuel transport container and the safe transportation of the nuclear fuel assembly.

[0066] The above embodiments are only used to help understand the method and core idea of ​​the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0067] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A secondary buffer bracket for a nuclear fuel transport container, characterized in that: The invention comprises two first bracket units, a second bracket unit is arranged between the two first bracket units, the first bracket unit and the second bracket unit are tightly connected, the first bracket unit comprises: a frame composed of a first end beam (1) and a first side beam (2), a first rib (3) parallel to the first end beam (1), and its two ends are fixed to the first side beam (2); a second rib (4) parallel to the first side beam (2), and its two ends are fixed to the first end beam (1); A secondary buffer (5) is provided at the four top corners of the frame. The secondary buffer (5) is clamped with a stopper iron (6) and the first end beam (1). The stopper iron (6) is parallel to the first end beam (1), and the two ends of the stopper iron (6) are fixed to the first side beam (2) and the second rib (4). The lower part of the secondary buffer (5) is fixed on the base (7). The frame and the base (7) are overlapped via a friction plate (8); A first end stop (9) is parallel to and close to the first end beam (1), the two ends of the first end stop (9) are fixed on the first side beam (2), the first end stop (9) and the side stop (10) and the mounting plate (11) form a slot; the slots are symmetrically arranged and are at least four in number; The second bracket unit comprises: A frame composed of a second end beam (1') and a second side beam (2'); The third rib (3') is parallel to the second end beam (1'), and its two ends are fixed to the second side beam (2'); the fourth rib (4') is parallel to the second side beam (2'), and its two ends are fixed to the second end beam (1'); The second end block (9') is parallel to and close to the second end beam (1'); the two ends of the second end block (9') are fixed on the second side beam (2'); the second end block (9') forms a slot with the side block (10) and the mounting plate (11); the slots are symmetrically arranged and there are at least four of them.

2. The secondary buffer bracket of the nuclear fuel transport container according to claim 1, characterized in that: There are two first ribs (3) evenly distributed in the frame; there are three second ribs (4) evenly distributed in the frame; There are two third ribs (3') evenly distributed in the frame; there are three fourth ribs (4') evenly distributed in the frame.

3. The secondary buffer bracket of the nuclear fuel transport container according to claim 2, characterized in that: A supporting leg (12) is fixed on the second rib in the middle.

4. The secondary buffer bracket of the nuclear fuel transport container according to claim 1, characterized in that: Also includes: Bolt hooks (13) are arranged on both ends of the first side beam (2).

5. The secondary buffer bracket of the nuclear fuel transport container according to claim 1, characterized in that: Also includes: The hanging screws (14) are symmetrically arranged on the first side beam (2).

6. The secondary buffer bracket of the nuclear fuel transport container according to claim 2, characterized in that: The second bracket unit is provided with four second end blocks (9'), of which two second end blocks (9') are respectively close to the second end beam (1'), two second end blocks (9') are arranged in the middle of the frame, and the two second end blocks (9') arranged in the middle form a slot with the side block (10) and the mounting plate (11); the slots are two and symmetrically arranged.

7. The secondary buffer bracket of the nuclear fuel transport container according to claim 6, characterized in that: The first bracket unit is provided with two pairs of card slots, and the second bracket unit is provided with three pairs of card slots.

8. The secondary buffer bracket of the nuclear fuel transport container according to claim 1, characterized in that: The card slot matches the base size of the nuclear fuel transport container.

9. The secondary buffer bracket of the nuclear fuel transport container according to claim 1, characterized in that: The first bracket unit is limited vertically and horizontally by a base (7) and a secondary buffer (5).

Images