A platform for pre-loading fuel rods

Abstract

The present invention belongs to the field of machinery, and specifically relates to a platform for preloading fuel rods. It includes a connecting block, a pin shaft, a tail plate, a connecting rod, a dovetail groove, a roller, a baffle, a connecting plate, an adjustment support plate, a frame, a nut, an adjustment rod, a support rod and an aluminum profile; the connecting block is respectively connected to the pin shaft and the connecting rod, the connecting block is respectively connected to the tail plate and the adjustment support plate, the dovetail groove is respectively connected to the connecting rod and the support rod, the dovetail groove is connected to the frame, the roller is connected to the aluminum profile, the baffle is connected to the connecting plate, the connecting plate is respectively connected to the baffle and the aluminum profile, the nut is connected to the adjustment rod, the nut applies a pressing force to the frame, and the adjustment rod is respectively connected to the connecting block and the pin shaft. The beneficial effects of the present invention are: (1) There are no new scratches or scratches on the surface of the fuel rods sent into the preloading box through the preloading platform; (2) There is no safety hazard of the fuel rods falling to the ground and being scrapped during the preloading process; (6) By adjusting the support plate, the fuel rods on the same layer can be quickly loaded into the preloading box.

Description

Technical Field

[0001] The invention belongs to the field of machinery, and in particular relates to a platform for pre-installing fuel rods. Background Art

[0002] Before the fuel rods are pulled into assemblies, they need to be loaded into pre-assembled boxes first, and then assembled by the rod pulling machine. This is mainly because the fuel rods need to be fixed in position in the pre-assembled boxes to ensure the precise positioning of the rod pulling action. When loading the fuel rods into the pre-assembled boxes, the original machine frame is made of carbon steel and the surface is a stainless steel operating platform. The fuel rod box is first placed on the platform, and the fuel rods are manually dragged from the fuel box onto the stainless steel operating platform for cleaning, and then scanned and loaded into the pre-assembled box. There are several problems:

[0003] (1) Quality risk. Although stainless steel is on the list of materials that can be contacted by fuel rods, due to its hardness, there is a risk of scratching the fuel rods during relative movement with the fuel rods;

[0004] (2) Safety risks. The original stainless steel platform was only a carbon steel frame with a stainless steel plate laid on top. There was no shielding on the four sides. During manual operation, at least two people stood on both sides to ensure that the fuel rods would not fall to the ground and be scrapped.

[0005] (3) High labor intensity. The pre-installed box is composed of multiple sets of perforated frame plates (used to limit the freedom of the fuel rods and play a limiting role). The fuel rods need to be inserted into the perforated frame plates manually. Since the bottom support of the fuel rods is a flat surface, the fuel rods must be lifted manually and then aligned with the holes in the frame plates. In addition, during the number reading process, the fuel rods must be rotated to a certain angle to ensure that the barcode on them can be recognized. Manually lifting and loading the fuel rods for a long time is labor-intensive and cumbersome. The straightness of the fuel rods is also easily changed during the lifting process.

[0006] (4) Too many operators. In order to insert all the fuel rods, the operators must walk from one end of the support platform to the other. If they do not do this, it will be difficult to ensure that the end of the fuel rod away from the pre-installed box is aligned with the pre-installed box. Any twisting or bending will cause the risk of abnormal scratches on the surface of the fuel rod during the insertion process. Therefore, when performing the pre-installed box, at least 5 operators are required to operate simultaneously, which results in low personnel utilization efficiency.

[0007] (5) Fuel rod loading is difficult. Since the hole diameter in the pre-installed box frame is slightly larger than the outer diameter of the fuel rod, during the fuel rod loading process, it is necessary to manually ensure that each fuel rod is aligned and inserted. Loading is difficult and has high requirements on the operator's operating level. Summary of the invention

[0008] The purpose of the present invention is to provide a platform for pre-loading fuel rods, which can solve the potential quality risk problem that the original operating platform may scratch the fuel rods; solve the risk of accidental falling to the ground due to the original operating platform having no protective structure; solve the problems of high manual labor intensity and low production efficiency; solve the potential quality risk problem of poor straightness; solve the problem of requiring a large number of operators; and solve the problem that fuel rods are difficult to load.

[0009] The technical solution of the present invention is as follows: a platform for pre-loading fuel rods, comprising a connecting block, a pin shaft, a tail plate, a connecting rod, a dovetail groove, a roller, a baffle, a connecting plate, an adjustment support plate, a frame, a nut, an adjustment rod, a support rod and an aluminum profile; the connecting block is respectively connected to the pin shaft and the connecting rod, the connecting block is respectively connected to the tail plate and the adjustment support plate, the dovetail groove is respectively connected to the connecting rod and the support rod, the dovetail groove is connected to the frame, the roller is connected to the aluminum profile, the baffle is connected to the connecting plate, the connecting plate is respectively connected to the baffle and the aluminum profile, the nut is connected to the adjustment rod, the nut applies a pressing force to the frame, and the adjustment rod is respectively connected to the connecting block and the pin shaft.

[0010] The aluminum profile is connected to the baffle through a threaded structure, and the aluminum profile is connected to the support rod through tolerance matching.

[0011] The connecting block is connected to the pin shaft and the connecting rod respectively through tolerance fitting, and the connecting block is connected to the tail plate and the adjusting support plate respectively through a threaded structure.

[0012] The pin connects the connecting block and the connecting rod together through tolerance fitting.

[0013] The tail plate is connected to the connecting block through a threaded structure.

[0014] The connecting rod is connected to the connecting block and the dovetail groove respectively through tolerance matching.

[0015] The dovetail groove is connected to the connecting rod and the supporting rod respectively through tolerance matching, and the dovetail groove is connected to the frame through welding.

[0016] The roller is connected to the aluminum profile through tolerance matching.

[0017] The baffle is connected to the connecting plate through a threaded structure.

[0018] The connecting plate is connected to the baffle and the aluminum profile respectively through a threaded structure.

[0019] The beneficial effects of the present invention are:

[0020] (1) There are no new scratches or marks on the surface of the fuel rods delivered into the pre-packaging box through the pre-packaging platform;

[0021] (2) There is no potential safety hazard of fuel rods falling off and becoming scrapped during the pre-assembly process;

[0022] (3) The labor intensity is reduced and the production efficiency is increased by 100%;

[0023] (4) The straightness of the fuel rods fed into the pre-packaging box via the pre-packaging platform meets the use requirements;

[0024] (5) The number of operators is reduced by 2;

[0025] (6) By adjusting the support plate, fuel rods on the same layer can be quickly loaded into the pre-installed box. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of a platform for preloading fuel rods provided by the present invention.

[0027] In the figure: 1 connecting block, 2 pin shaft, 3 tail plate, 4 connecting rod, 5 dovetail groove, 6 roller, 7 baffle, 8 connecting plate, 9 adjustment support plate, 10 frame, 11 nut, 12 adjustment rod, 13 support rod, 14 aluminum profile. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1 As shown, a platform for pre-loading fuel rods includes a connecting block 1, a pin shaft 2, a tail plate 3, a connecting rod 4, a dovetail groove 5, a roller 6, a baffle 7, a connecting plate 8, an adjustment support plate 9, a frame 10, a nut 11, an adjustment rod 12, a support rod 13 and an aluminum profile 14.

[0030] The connecting block 1 is connected to the pin 2 and the connecting rod 4 respectively through tolerance fitting, and the connecting block 1 is connected to the tail plate 3 and the adjusting support plate 9 respectively through a threaded structure. The pin 2 connects the connecting block 1 and the connecting rod 4 together through tolerance fitting. The tail plate 3 is connected to the connecting block 1 through a threaded structure. The connecting rod 4 is connected to the connecting block 1 and the dovetail groove 5 respectively through tolerance fitting. The dovetail groove 5 is connected to the connecting rod 4 and the support rod 13 respectively through tolerance fitting, and the dovetail groove 5 is connected to the frame 10 by welding. The roller 6 is connected to the aluminum profile 14 through tolerance fitting. The baffle 7 is connected to the connecting plate 8 through a threaded structure. The connecting plate 8 is connected to the baffle 7 and the aluminum profile 14 respectively through a threaded structure. The adjusting support plate 9 is connected to the connecting block 1 through a threaded structure. The frame 10 is connected to the dovetail groove 5 by welding. The nut 11 is connected to the adjusting rod 12 through a threaded structure, and the nut 11 applies a pressing force to the frame 10. The adjusting rod 12 is connected to the connecting block 1 and the pin 2 respectively through tolerance fitting, and the adjusting rod 12 is connected to the nut 11 through a threaded structure. The support rod 13 is connected to the dovetail groove 5 and the aluminum profile 14 respectively through tolerance fitting. The aluminum profile 14 is connected to the baffle 7 through a threaded structure, and the aluminum profile 14 is connected to the support rod 13 through tolerance fitting.

[0031] The connecting block 1 is connected to the pin 2 and the connecting rod 4 respectively through tolerance fitting, and the connecting block 1 is connected to the tail plate 3 and the adjusting support plate respectively through a threaded structure. The connecting block 1 is used to connect and fix the tail plate 3 and the adjusting support plate 9. The pin 2 is used to rotate to realize the rotation of the connecting block 1 or the adjusting support plate 9. The pin 2 connects the connecting block 1 and the connecting rod 4 together through tolerance fitting. The tail plate 3 is mainly used to prevent the fuel rods from accidentally falling from the side of the tail plate 3 during the pre-installation process, because the roller 6 is not locked and the fuel rods can move in any direction. The tail plate 3 is connected to the connecting block 1 through a threaded structure. The connecting rod 4 is used to support the connecting block 1 and the adjusting support plate 9 respectively. The connecting rod 4 is connected to the connecting block 1 and the dovetail groove 5 respectively through tolerance fitting. The dovetail groove 5 is fixed on the frame 10, and the connecting rod 4 and the support rod 13 thereon can be fixed. Because the support rod 13 cannot be directly fixed on the frame 10 (fixed on the frame 10, the position cannot be quickly adjusted), the dovetail groove 5 is designed for bidirectional connection. At the same time, the position of the connecting rod 4 can be adjusted according to the length of the fuel rod to ensure that the tail plate 3 does not interfere with the fuel rod (different fuel rods have different lengths, and the position of the tail plate 3 needs to be adjusted). The dovetail groove 5 is connected to the connecting rod 4 and the support rod 13 respectively through tolerance matching, and the dovetail groove 5 is connected to the frame 10 by welding. The roller 6 is used to transmit the fuel rod and is in direct contact with the fuel rod. The fuel rod is rolling friction on it. The roller spacing is arranged to ensure that the fuel rod is supported at multiple points to avoid bending of the fuel rod. The roller 6 is connected to the aluminum profile 14 through tolerance matching. The baffle 7 is used to prevent the fuel rod from accidentally falling from both sides. The baffle 7 is connected to the connecting plate 8 through a threaded structure. The connecting plate 8 is used to connect the baffle 7 and the aluminum profile 14 together, and is in direct contact with the fuel rod near the side of the adjustment support plate 9. This is for the convenience of reading the number and preparation before entering the adjustment support plate 9. The connecting plate 8 is connected to the baffle 7 and the aluminum profile 14 respectively through a threaded structure. The adjustment support plate 9 adjusts a certain angle and height to ensure that the fuel rod is flush with the pre-installed box hole position, and the layer is loaded. Usually, a fuel rod is first drawn at a distance of 5mm from the pre-installed box, and the angle of the adjustment support plate 9 is adjusted after the human eye observes the position to ensure that the center line of the fuel rod and the pre-installed box hole position is as consistent as possible. When one fuel rod is successfully loaded, the remaining fuel rods in the same layer directly use this angle to load other holes, and complete the loading of multiple rods in the same layer. The adjustment support plate 9 is connected to the connection block 1 through a threaded structure. The frame 10 is the base of the whole set of equipment, and the frame 10 is connected to the dovetail groove 5 by welding. The nut 11 is used to adjust and tighten the adjustment rod 12. The nut 11 is connected to the adjustment rod 12 through a threaded structure, and the nut 11 applies a pressing force to the frame 10. The adjustment rod 12 is used to adjust the height and angle of the support plate 9. The adjustment rod 12 is connected to the connection block 1 and the pin 2 through tolerance matching, and the adjustment rod 12 is connected to the nut 11 through a threaded structure. The support rod 13 is used to support the parts on it, and after lifting a certain height, it is easy to install, and the roller part is hidden below. The support rod 13 is connected to the dovetail groove 5 and the aluminum profile 14 through tolerance matching.The aluminum profile 14 is used for connection and fixing. The aluminum profile 14 is connected to the baffle 7 through a threaded structure, and the aluminum profile 14 is connected to the support rod 13 through tolerance fitting.

[0032] The method of use of the present invention is as follows:

[0033] The fuel rods are manually lifted onto the fuel rod preloading platform, and manually sent to the adjustment support plate by rollers. The numbers are manually read (the fuel rod barcode data is entered), and a fuel rod is first pre-sent to a position about 5 mm away from the preloading box. The height of the support plate is adjusted to make the fuel rods correspond to the holes in the preloading box. After one fuel rod is loaded, the remaining fuel rods are loaded into the corresponding holes in the same layer in turn to complete the loading of one layer, and then the preloading box is raised and lowered to complete the loading of the remaining layers.

[0034] The innovative features of the present invention are as follows:

[0035] (1) The platform with rollers was originally moved manually from one end of the fuel rod to the other. This was mainly because although the stainless steel platform and the fuel rods are made of metal and are relatively smooth, due to sliding friction, a large force is required to move multiple fuel rods simultaneously (the efficiency of moving a single fuel rod is low). Therefore, it is considered to install multiple rollers on the platform so that the contact mode between the fuel rods and the platform becomes rolling friction. As the friction is reduced, the labor intensity is reduced.

[0036] (2) Baffles. Since the platform is long, baffles need to be added at both ends to prevent the fuel rods from accidentally falling (the original protection relied on operators standing at both ends). Considering the possibility of contact with the fuel rods, the baffles are made of plastic materials that can directly contact the fuel rods. The baffles are the same length as the platform to ensure that there is no possibility of fuel rods falling on the entire platform. In addition, a tail plate is added on one side of the fuel rod to ensure that the fuel rods will not slide to the side where the tail plate is located through the rollers, thereby ensuring the safety of the fuel rods.

[0037] (3) Adjusting the support plate. Before the fuel rods enter the pre-installed box, the height of the platform where the fuel rods are located needs to be aligned with the height of the pre-installed box. Since the height of the pre-installed box and the platform is fixed, the fuel rods cannot be aligned with the holes when they are directly inserted, which increases the difficulty of loading. This is mainly because once the fuel rods are not aligned, the first end of the fuel rod (the end that first enters the pre-installed box) is inserted obliquely during the loading process. During the loading process, the two ends of the fuel rod affect each other, causing the fuel rod to bend when entering, and constantly contact and rub against the frame plate inside, which will cause scratches on the surface of the fuel rod, or even scratch defects. For this reason, an adjusting support plate is designed at the end of the platform near the pre-installed box. The support plate can be adjusted to a suitable angle and position by adjusting the screws, so that the fuel rods can be quickly adjusted to the same height as the pre-installed box. Once one fuel rod is adjusted, the remaining fuel rods on the same layer do not need to readjust their heights and can be directly inserted into their designated holes.

[0038] The advantages of the present invention are:

[0039] (1) Low labor intensity

[0040] The platform is equipped with rollers, so that when manual labor is used to move the fuel rods, the fuel rods can be delivered to the designated workstations more easily without having to pull them over long distances. In addition, thanks to the adjustable support plate, as long as one fuel rod can be smoothly loaded into the pre-installed box, multiple fuel rods on the same layer can be directly loaded in, saving the time of manual alignment one by one.

[0041] (2) High staff utilization rate

[0042] The original support platform requires at least 5 people to operate, 2 of whom stand on both sides of the support platform to act as baffles to prevent the fuel rods from accidentally falling. Since the present invention adds baffles, 2 operators can be saved to do other work, and the utilization rate of personnel is improved.

[0043] (3) High fuel rod safety

[0044] Due to the addition of baffles, no manual protection is required, reliability and safety are increased, and the risk of fuel rods accidentally falling to the ground is reduced to zero.

[0045] (4) Quality is guaranteed

[0046] Since the intensity and difficulty of manual labor are reduced, manual operation during the fuel rod loading process is more standardized and safer. Some structures, such as rollers, reduce friction and also reduce the risk of scratches or marks on the surface of the fuel rods.

Claims

1. A platform for preloading fuel rods, characterized in that: It includes a connecting block, a pin shaft, a tail plate, a connecting rod, a dovetail groove, a roller, a baffle, a connecting plate, an adjusting support plate, a frame, a nut, an adjusting rod, a support rod and an aluminum profile; the connecting block is respectively connected to the pin shaft and the connecting rod, the connecting block is respectively connected to the tail plate and the adjusting support plate, the dovetail groove is respectively connected to the connecting rod and the support rod, the dovetail groove is connected to the frame, the roller is connected to the aluminum profile, the baffle is connected to the connecting plate, the connecting plate is respectively connected to the baffle and the aluminum profile, the nut is connected to the adjusting rod, the nut applies a pressing force to the frame, the adjusting rod is respectively connected to the connecting block and the pin shaft, the connecting block is used to connect and fix the tail plate and the adjusting support plate, the pin shaft is used to rotate to realize the rotation of the connecting block or the adjusting support plate, The tail plate is used to prevent the fuel rods from accidentally falling off from the tail plate side during the pre-installation process. The connecting rods are used to support the connecting blocks and the adjusting support plates respectively. The dovetail groove is fixed on the frame, and the connecting rods and support rods thereon can be fixed. The rollers are used to transmit the fuel rods and are in direct contact with the fuel rods. The roller spacing is arranged to ensure that the fuel rods are supported at multiple points to avoid bending of the fuel rods. The baffle is used to prevent the fuel rods from accidentally falling off from both sides. The connecting plate is used to connect the baffle and the aluminum profile together. The adjusting support plate ensures that the fuel rods are flush with the pre-installed box holes by adjusting a certain angle and height. The dovetail groove is connected to the connecting rod and the support rod respectively through tolerance matching, and the dovetail groove is connected to the frame by welding.

2. A platform for preloading fuel rods as claimed in claim 1, characterized in that: The aluminum profile is connected to the baffle through a threaded structure, and the aluminum profile is connected to the support rod through tolerance matching.

3. A platform for preloading fuel rods as claimed in claim 1, characterized in that: The connecting block is connected to the pin shaft and the connecting rod respectively through tolerance fitting, and the connecting block is connected to the tail plate and the adjusting support plate respectively through a threaded structure.

4. A platform for preloading fuel rods as claimed in claim 1, characterized in that: The pin connects the connecting block and the connecting rod together through tolerance fitting.

5. A platform for preloading fuel rods as claimed in claim 1, characterized in that: The tail plate is connected to the connecting block through a threaded structure.

6. A platform for preloading fuel rods as claimed in claim 1, characterized in that: The connecting rod is connected to the connecting block and the dovetail groove respectively through tolerance matching.

7. A platform for preloading fuel rods as claimed in claim 1, characterized in that: The roller is connected to the aluminum profile through tolerance matching.

8. A platform for preloading fuel rods as claimed in claim 1, characterized in that: The baffle is connected to the connecting plate through a threaded structure.

9. A platform for preloading fuel rods as claimed in claim 1, characterized in that: The connecting plate is connected to the baffle and the aluminum profile respectively through a threaded structure.

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