Coating Assembly and Lubrication System for Fuel Rod Lubrication

Abstract

The present invention discloses a painting assembly and a lubrication system for fuel rod lubrication, including a painting roller. The painting roller includes a brush layer as the outer layer of the painting roller, and further includes a paddle. The paddle is a strip-shaped structure with its length direction parallel to the length direction of the painting roller. One side of the paddle is embedded in the brush layer, and the material of the paddle is an elastic material. The lubrication system includes the painting assembly. By adopting the painting assembly and the lubrication system provided by this solution, the problem of uneven water coating on the surface of the fuel rod can be effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear reactor fuel assembly production, and particularly to a brushing assembly and a lubrication system for fuel rod lubrication. Background Art

[0002] According to the production processes of fuel assemblies at home and abroad, fuel rods mainly enter the assembly skeleton in two ways: pushing and pulling. During the process of the fuel rod entering the assembly skeleton, there is always friction with the skeleton, and such friction will cause scratches on the surface of the fuel rod. However, for fuel assemblies with high quality requirements, minimizing friction scratches is a common research goal for all assembly plants.

[0003] Currently, different solutions have been proposed at home and abroad for reducing friction scratches during the pushing (pulling) process of fuel rods. However, the mainstream solution is to make a layer of fine water droplets adhere to the fuel rod through a special system before the fuel rod enters the skeleton. When the fuel rod contacts the skeleton, the water droplets can reduce the friction coefficient between the two, convert dry friction into lubricated contact, thereby achieving the effect of reducing friction scratches.

[0004] Based on this mechanism, different lubrication systems have been designed at home and abroad. For example, the patent application number: 201511027878.5, and the invention creation name: A water lubrication system for fuel rod assembly pulling provides corresponding technical solutions. By adopting these solutions, the following technical effects can be achieved: Using water medium and a water lubrication system to lubricate the surface of the fuel rod during the fuel rod assembly pulling process, in order to reduce the generation of long strip and filamentous zirconium chips on the surface of the fuel rod and the number of zirconium chips during the assembly pulling process, reduce the scratches on the surface of the fuel rod bundle in the fuel assembly caused by the zirconium chips remaining in the fuel assembly, and further prevent the breakage of the fuel rod in the nuclear reactor. This has important safety and practical significance.

[0005] Further optimizing the structural design of the lubrication system undoubtedly has important significance for optimizing the assembly process and safety of nuclear fuel assemblies. Summary of the Invention

[0006] In view of the above-mentioned problem that further optimizing the structural design of the lubrication system undoubtedly has important significance for optimizing the assembly process and safety of nuclear fuel assemblies, the present invention provides a brushing assembly and a lubrication system for fuel rod lubrication. By adopting the brushing assembly and the lubrication system provided by this solution, the problem of uneven water coating on the surface of the fuel rod can be effectively solved.

[0007] The technical means of this solution are as follows: a brushing assembly and a lubrication system for fuel rod lubrication, the brushing assembly includes a brushing roller, the brushing roller includes a brush layer as the outer layer of the brushing roller, and also includes a dial, the dial is a strip-shaped structure with the length direction parallel to the length direction of the brushing roller;

[0008] One side of the plectrum is embedded in the brush layer, and the plectrum is made of elastic material.

[0009] In the prior art, the lubrication system for assembling fuel rods in a fuel assembly generally uses a roller immersed in water in a water tank, and utilizes the water absorbed by the roller surface brush to complete the coating of the lubricating water on the surface of the fuel rod when the fuel rod passes through the brush.

[0010] For this solution, the brush layer of the brush roller serves as a water absorbing layer. During the rotation of the brush roller around its own axis, the brush roller continuously contacts with the water body to achieve continuous water replenishment. During the contact with the fuel rod, the water on the brush layer is coated on the fuel rod.

[0011] However, fuel rods generally have a smooth surface, such as a zirconium alloy tube whose outer layer is poor, so the fuel rods have poor adhesion to the above water bodies: after the fuel rods pass through the brushing roller, it is not only difficult to obtain a complete water film on the surface of the fuel rods, but also when the water droplets hanging on the surface of the fuel rods are large, the water droplets will fall due to the poor adhesion of the fuel rods to the water body, resulting in subsequent problems of poor lubrication of the fuel rods and pollution of the assembly environment.

[0012] In the specific application of this scheme, the paddle is arranged on the discharge side of the brush roller. During the rotation of the brush roller around its own axis, since the paddle is made of elastic material and one side of the paddle is embedded in the brush layer, the brush roller can paddle the paddle to vibrate continuously during the rotation of the brush roller. Since one side of the paddle is embedded in the brush layer, when the brush layer rotates partially to interact with the paddle, the water adsorbed in this area of ​​the brush layer is squeezed out. Under the action of the vibration of the paddle, the squeezed water can be projected onto the surface of the fuel rod, that is, for the wetting of the fuel rod, different from the existing direct coating method, the lubricating water is sprayed on the fuel rod by projecting the paddle, which not only increases the water coverage area on the fuel rod, but also makes the water droplets smaller in size through the spraying method. In combination with spraying after the coating is completed, the water droplets on the surface of the fuel rod can also be better and attached to the fuel rod in a smaller granular form. That is, the present solution can optimize the lubrication effect of the fuel rod assembly while reducing the risk of nuclear radiation contamination caused by dripping water droplets. At the same time, considering the source of the water used for throwing, the present solution has a simple structure and only requires simple improvements on the existing lubrication system.

[0013] Since the existing fuel rods are mostly arranged in an array on the skeleton, and for the specific assembly process of the fuel assembly, the fuel rods generally pass through the brushing roller row by row. Therefore, in specific applications, if defined in the axial direction of the brushing roller, the area where the brushing roller acts on the fuel rods is the effective area. Thus, the contact area between the paddle and the brush layer needs to span the effective area. Specifically, it can be set as follows: One side of the paddle is detachably connected to the brushing water tank through a mounting bracket, and the free end of the paddle is embedded in the brush layer. Considering the stress fatigue problem, the fixing method of the fixed end of the paddle is set as a detachable connection method. For the specific water brushing mode in which two brushing rollers rotate in opposite directions widely used in the prior art, it is preferably set that the paddle is fixed on the side of the discharge side, and the free end of the paddle is a sheet structure. The side of the sheet structure close to the fuel rod passing channel is defined as the sprinkling surface, and the sprinkling surface faces the fuel rod passing channel; with the sheet structure as the midpoint, the sprinkling surface faces the fuel rod passing channel on the side away from the brushing roller, so as to reduce the redistribution of water droplets sprayed on the surface of the fuel rods, achieve the refinement of water droplets, and reduce the nuclear pollution risk caused by the fall of water droplets. The paddle can be made of elastic metal material or elastic polymer material.

[0014] A further technical solution is as follows:

[0015] To enable the brush layer to cover as many positions as possible in the circumferential direction of the fuel rods to obtain a better water brushing effect, it is set that: there are two brushing rollers, the two brushing rollers are parallel to each other, and the brush layers of the two brushing rollers are mutually extruded;

[0016] As a person skilled in the art in this field, during the process of the paddle squeezing out and sprinkling water, the paddle itself has a redistributing effect on the water on the brush layer. To make the water content at each point more uniform in the axial direction of the brushing roller, it is set that: each brushing roller is matched with a paddle, and the relationship between the mutually matched paddle and the brushing roller is as follows: the paddle is parallel to the brushing roller, and one side of the paddle is embedded in the brush layer of the brushing roller;

[0017] As a specific application of the brushing component including the paddle, it is set that: on the brushing component, one side of the position where the brush layers are mutually extruded is the feeding side for introducing the fuel rods, and the opposite side of this side is the discharging side for leading out the fuel rods, and the paddles are all arranged on the discharging side.

[0018] As a specific implementation method for the brush layer to have an ideal service life under the action of the paddle, the brush layer is a nylon layer or a bristle layer.

[0019] More comprehensively, as a specific setting form of the brushing component, it is set that: it further includes a brushing water tank, and the paddle and the brushing rollers are both fixed on the brushing water tank.

[0020] For the convenience of monitoring the lubrication condition of the fuel rod at any time, it is set that the coating water tank is made of transparent material.

[0021] For the convenience of checking the liquid level in the coating water tank, it is set that: it further includes a liquid level sensor for checking the liquid level in the coating water tank.

[0022] To avoid the situation that due to excessive water in the coating water tank, the coating roller absorbs too much moisture, and finally too much water is obtained on the surface of the fuel rod under the action of this coating assembly, resulting in nuclear pollution caused by dripping during the subsequent transfer of the fuel rod, it is set that: it further includes an overflow hole provided on the side wall of the coating water tank.

[0023] As a specific application of the coating assembly, this solution also provides a lubrication system for fuel rod lubrication, including the coating assembly described in any one of the above.

[0024] As a further technical solution of the lubrication system for fuel rod lubrication,

[0025] It further includes a pure water tank, a water pump, a coating water tank and a waste water tank. The coating assembly is arranged in the coating water tank. The water pump is used to pump the water in the pure water tank into the coating water tank. An overflow hole is provided on the side wall of the coating water tank. An overflow pipe is arranged between the overflow hole and the waste water tank. A drain pipe is also arranged between the bottom of the coating water tank and the waste water tank. When this solution is specifically applied, the pure water tank is used as the water source of the coating water tank, the water pump is used as the power source of the water source of the coating water tank, and the waste water tank is used to collect the water from the coating water tank. By adopting this solution, the overflow pipe is used to introduce the water discharged due to overflow in the coating water tank into the waste water tank, and the drain pipe is used to introduce the discharged water into the waste water tank when the water in the coating water tank needs to be replaced. By adopting this solution, the water discharged by this lubrication system can finally be collected in the waste water tank, which is convenient for subsequent centralized harmless treatment.

[0026] To avoid damage to the surface of the fuel rod and affect the normal assembly of the fuel assembly due to impurities introduced into the coating water tank in case of an accident, it is set that: it further includes a pure water tank, a water pump, and a coating water tank. The coating assembly is arranged in the coating water tank. The water pump is used to pump the water in the pure water tank into the coating water tank. A filter is also arranged between the water pump and the pure water tank.

[0027] The present invention has the following beneficial effects:

[0028] In the specific application of this scheme, the paddle is arranged on the discharge side of the brush roller. During the rotation of the brush roller around its own axis, since the paddle is made of elastic material and one side of the paddle is embedded in the brush layer, during the rotation of the brush roller, the brush roller can paddle the paddle to vibrate continuously. Since one side of the paddle is embedded in the brush layer, when the brush layer rotates partially to interact with the paddle, the water adsorbed in this area of ​​the brush layer is squeezed out. Under the action of the vibration of the paddle, the squeezed water can be projected onto the surface of the fuel rod, that is, for the wetting of the fuel rod, different from the existing direct coating method, the spraying of the lubricating water on the fuel rod by the paddle projectile can not only increase the water coverage area on the fuel rod, but also make the water droplets smaller in size by spraying. In combination with spraying after the brush layer is cleaned and wetted, the water droplets on the surface of the fuel rod can also be better attached to the fuel rod in a smaller granular form. At the same time, the vibration introduced by the paddle to the brush roller can also shake off the water drops on the brush roller, avoiding the subsequent water droplet dripping problem caused by local overwetting of the fuel rod. That is, the adoption of this solution can optimize the lubrication effect of the fuel rod assembly while reducing the risk of nuclear radiation contamination caused by water droplets dripping; at the same time, considering the source of the water body used for throwing, this solution has a simple structure and can be simply improved on the existing lubrication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a specific embodiment of the lubrication system for lubricating fuel rods according to the present invention;

[0030] Figure 2 1 is a schematic structural diagram of a specific embodiment of the lubrication system for lubricating fuel rods of the present invention, and the schematic diagram is a partial schematic diagram including a brushing water tank portion;

[0031] Figure 3 is a structural schematic diagram of a specific embodiment of the lubrication system for lubricating fuel rods according to the present invention. Figure 2 , the schematic diagram does not show the painting water tank, which is used to reflect the matching form of the painting roller and the matching form of the painting roller and the paddle;

[0032] Figure 4 yes Figure 2 A cross-sectional view of the structure shown.

[0033] The reference numerals in the figure are: 1. pure water tank, 2. filter, 3. water pump, 4. drive motor, 5. brush water tank, 6. overflow pipe, 7. drain pipe, 8. waste water tank, 9. brush roller, 10. paddle, 11. positioning plate, 12. liquid level sensor, 13. mounting bracket. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below in conjunction with embodiments, but the structure of the present invention is not limited to the following embodiments.

[0035] Embodiment 1: As Figures 1 to 4 shown, the brushing assembly for fuel rod lubrication includes a brushing roller 9. The brushing roller 9 includes a brush layer as the outer layer of the brushing roller 9, and further includes a paddle 10. The paddle 10 is a strip-shaped structure with its length direction parallel to the length direction of the brushing roller 9;

[0036] One side of the paddle 10 is embedded in the brush layer, and the material of the paddle 10 is an elastic material.

[0037] In the prior art, the lubrication system for fuel rod assembly in a fuel assembly generally uses a roller to soak in a water tank, and utilizes the water absorption of the brush on the roller surface. When the fuel rod passes through the brush, the water body for lubrication is coated on the surface of the fuel rod.

[0038] For this solution, that is, the brush layer of the brushing wheel roller serves as the water absorption layer. During the rotation of the brushing roller 9 around its own axis, the brushing roller 9 continuously contacts the water body, realizes continuous replenishment of the water body, and at the same time, when contacting the fuel rod, coats the water body on the brush layer on the fuel rod.

[0039] However, the fuel rod generally has a smooth surface. For example, its outer layer is a zirconium alloy tube. Therefore, the adhesion ability of the fuel rod to the above water body is poor: after the fuel rod passes through the brushing roller 9, it is difficult to obtain a complete water film on the surface of the fuel rod. At the same time, when the water droplets hanging on the surface of the fuel rod are relatively large, due to the poor adhesion ability of the fuel rod to the water body, the water droplets will fall, resulting in problems such as poor lubrication of the fuel rod and pollution of the assembly environment subsequently.

[0040] In the specific application of this scheme, the paddle 10 is arranged on the discharge side of the brush roller 9. During the rotation of the brush roller 9 around its own axis, since the paddle 10 is made of elastic material and one side of the paddle 10 is embedded in the brush layer, the brush roller 9 can paddle the paddle 10 to vibrate continuously during the rotation of the brush roller 9. Since one side of the paddle 10 is embedded in the brush layer, when the brush layer rotates partially to interact with the paddle 10, the water adsorbed in this area of ​​the brush layer is squeezed out. Under the action of the vibration of the paddle 10, the squeezed water can be projected onto the surface of the fuel rod, that is, for the wetting of the fuel rod, different from the existing direct coating method, the lubricating water is sprayed on the fuel rod by projecting the paddle 10, which not only increases the water coverage area on the fuel rod, but also, through the spraying method, the size of the water droplets obtained is smaller. In combination with spraying after the coating is completed, the water droplets on the surface of the fuel rod can also be better and attached to the fuel rod in a smaller granular form. That is, the present solution can optimize the lubrication effect of the fuel rod assembly while reducing the risk of nuclear radiation contamination caused by dripping water droplets. At the same time, considering the source of the water used for throwing, the present solution has a simple structure and only requires simple improvements on the existing lubrication system.

[0041] Since the arrangement of existing fuel rods on the skeleton is mostly an array arrangement, and for the specific assembly process of the fuel assembly, the fuel rods are generally arranged in a row through the brush roller 9, so in specific application, as defined in the axial direction of the brush roller 9, the area where the brush roller 9 acts on the fuel rods is the effective area, so the contact area between the paddle 10 and the brush layer needs to span the effective area. Specifically, it can be set as follows: one side of the paddle 10 is detachably connected to the brush water tank 5 through the mounting frame 13, and the free end of the paddle 10 is embedded in the brush layer. Considering the stress fatigue problem, the fixing method of the fixed end of the paddle 10 is set as a detachable connection method. For example, the paddle 10 is fixed to the mounting frame on the brush water tank 5 to complete the position fixation of the fixed end of the paddle 10. In view of the specific water-body brushing mode in which two brush rollers 9 rotate in opposite directions, which is widely used in the prior art, it is preferably set to fix the paddle 10 on the side of the discharge side, and the free end of the paddle 10 is a sheet-like structure, and the side of the sheet-like structure close to the fuel rod passage is defined as a throwing surface, and the throwing surface faces the fuel rod passage; with the sheet-like structure as the midpoint, the throwing surface faces the fuel rod passage away from the brush roller 9, so as to reduce the redistribution of water droplets sprayed on the surface of the fuel rod, so as to refine the water droplets and reduce the risk of nuclear contamination caused by the falling of water droplets. The paddle 10 can be made of elastic metal material or elastic polymer material. In specific application, in order to be more complete, in view of the problem of the power source for the rotation of the brush roller 9, it can be set to include a drive motor 4, and a belt drive method is adopted between the drive motor 4 and the brush roller 9 to provide protection for the brush assembly itself and the fuel rods.

[0042] Example 2:

[0043] This example makes further limitations on the basis of Example 1:

[0044] As shown in Figures 1 to 4 , in order to enable the brush layer to cover as many positions as possible in the circumferential direction of the fuel rod to obtain a better water body brushing effect, it is set that: there are two brushing rollers 9, the two brushing rollers 9 are parallel to each other, and the brush layers of the two brushing rollers 9 are mutually extruded;

[0045] As a person skilled in the art in this field, during the process of squeezing out and sprinkling the water body by the above-mentioned paddle 10, the paddle 10 itself has a redistributing effect on the water body on the brush layer. In order to make the water body content more uniform at each point in the axial direction of the brushing roller 9, it is set that: each brushing roller 9 is matched with a paddle 10, and the mutually matched paddle 10 and the brushing roller 9 have the following relationship: the paddle 10 is parallel to the brushing roller 9, and one side of the paddle 10 is embedded in the brush layer of the brushing roller 9;

[0046] As a specific application of the brushing component including the paddle 10, it is set that: on the brushing component, one side of the position where the brush layers are mutually extruded is the feeding side for introducing the fuel rod, the opposite side of the one side is the discharging side for discharging the fuel rod, and the paddle 10 is arranged on the discharging side.

[0047] As a specific implementation method in which the brush layer itself has an ideal service life under the action of the paddle 10, the brush layer is a nylon layer or a bristle layer.

[0048] More completely, as a specific setting form of the brushing component, it is set that: it further includes a brushing water tank 5, and the paddle 10 and the brushing roller 9 are both fixed on the brushing water tank 5.

[0049] In order to facilitate monitoring the lubrication condition of the fuel rod at any time, it is set that: the brushing water tank 5 is made of a transparent material.

[0050] In order to facilitate checking the liquid level condition in the brushing water tank 5, it is set that: it further includes a liquid level sensor 12 for checking the liquid level in the brushing water tank 5.

[0051] In order to avoid that because there is too much water body in the brushing water tank 5, the brushing roller 9 absorbs too much moisture, and finally too much water body is obtained on the surface of the fuel rod under the action of this brushing component, resulting in nuclear pollution due to dripping during the subsequent transfer of the fuel rod, it is set that: it further includes an overflow hole provided on the side wall of the brushing water tank 5.

[0052] To enable the fuel rod to pass through the coating assembly in a state where the relative positions are fixed as much as possible, facilitating subsequent fuel assembly, it is set that: there are also multiple inlet holes arranged side by side on the side inlet of the coating water tank 5, and the relative positions of the above inlet holes are the same as the relative positions of the fuel rods in the assembled state. Considering processing and matching, it is preferably set that the inlet holes are arranged on a positioning plate 11, and the above positioning plate 11 is fixed to the coating water tank 5.

[0053] Embodiment 3:

[0054] As Figures 1 to 4 shown, this embodiment makes further limitations on the basis of Embodiment 1: As a specific application of the coating assembly, this solution also provides a lubrication system for fuel rod lubrication, including the coating assembly described in any one of the above.

[0055] As a further technical solution of the lubrication system for fuel rod lubrication,

[0056] It also includes a pure water tank 1, a water pump 3, a coating water tank 5 and a waste water tank 8. The coating assembly is arranged in the coating water tank 5. The water pump 3 is used to pump the water in the pure water tank 1 into the coating water tank 5. An overflow hole is arranged on the side wall of the coating water tank 5. An overflow pipe 6 is arranged between the overflow hole and the waste water tank 8. A drain pipe 7 is also arranged between the bottom of the coating water tank 5 and the waste water tank 8. When this solution is specifically applied, the pure water tank 1 is used as the water source of the coating water tank 5, the water pump 3 is used as the power source of the water source of the coating water tank 5, and the waste water tank 8 is used to collect the water from the coating water tank 5. With this solution, the overflow pipe 6 is used to introduce the water discharged due to overflow in the coating water tank 5 into the waste water tank 8, and the drain pipe 7 is used to introduce the discharged water into the waste water tank 8 when it is necessary to replace the water in the coating water tank 5. With this solution, the water discharged from this lubrication system can finally be collected in the waste water tank 8, facilitating subsequent centralized harmless treatment.

[0057] To prevent impurities from being introduced into the coating water tank 5 due to unexpected situations, damaging the surface of the fuel rod and affecting the normal assembly of the fuel assembly, it is set that: it also includes a pure water tank 1, a water pump 3, and a coating water tank 5. The coating assembly is arranged in the coating water tank 5. The water pump 3 is used to pump the water in the pure water tank 1 into the coating water tank 5. A filter 2 is also arranged between the water pump 3 and the pure water tank 1.

[0058] Embodiment 4:

[0059] This embodiment makes further limitations on the basis of any one of the technical solutions provided in any of the above embodiments: To achieve the fit of the assembly route of the painting component and the fuel component, since it involves the position adjustment of the painting component, it is set as follows: It further includes a horizontal movement mechanism and a vertical lifting mechanism, which are respectively used to achieve the position adjustment of the painting component:

[0060] The horizontal movement mechanism is used to achieve the horizontal movement function, mainly for the storage of the painting water tank, and its purpose is to facilitate the operator to carry out other work of fuel rod assembly.

[0061] The vertical lifting mechanism is used to achieve the vertical lifting function, mainly for functions such as meeting the pulling of fuel rods in 17 layers. The fuel rods in the fuel component are arranged in a 17×17 matrix, and the fuel rods enter the fuel skeleton in layers.

[0062] When lubricating the component, for example, first the telescopic mechanism included in the horizontal movement mechanism sends out the vertical lifting mechanism and the painting water tank, then the vertical lifting mechanism rises to the initial fuel rod pulling layer, and the painting component, the water body circulation system and the pulling program are started. Until the last layer of fuel rods is completed, the vertical lifting mechanism drops to the lowest position, and the telescopic mechanism performs a retraction action to store the vertical lifting mechanism and the painting water tank in a fixed position. Thus, the assembly of a group of fuel components is completed.

[0063] Since this embodiment is a specific implementation method, although the corresponding components in this embodiment use the horizontal movement mechanism and the vertical lifting mechanism, in specific applications, for example, to achieve horizontal position adjustment and vertical position adjustment, the movement mode of the painting component is not limited to the mode that only horizontal movement or vertical movement can occur at a certain moment --- the fundamental purpose is only to change the position of the painting component. For example, the movement mode of the painting component can also include horizontal movement and vertical movement, and the change of the horizontal position or the vertical position at any moment is not limited to only one of them.

[0064] Implementation method for the liquid level detection function

[0065] The liquid level detection function is mainly used to detect the water level changes in the painting water tank and the pure water tank, providing guarantee for ensuring the normal operation of the entire lubrication system.

[0066] The liquid level detection is mainly distributed in the pure water tank and the painting water tank, and the main detection system is the liquid level gauge.

[0067] When the water level in the pure water tank is low, the entire lubrication system cannot work. After manually filling the pure water tank with water, the lubrication system is started again to replenish water to the painting water tank, and the water replenishment stops after the water replenishment amount reaches the upper limit of the water level in the painting water tank. During the working process, the liquid level gauge detection system continuously maintains the cycle of water level drop - water replenishment - water level rise.

[0068] Furthermore, the lubrication system provided in this embodiment is set to have self-locking and interlocking functions:

[0069] This function matches the entire system to ensure that the system complies with the production operation procedures, and is mainly used to protect the fuel rod and prevent the system from colliding with the fuel rod, resulting in damage to the fuel rod.

[0070] Implementation method of self-locking mode one: This mode is mainly realized by a set of opposed switches for signal detection and feedback to the control system. When the opposed switch placed at the front end of the painting water tank detects the fuel rod, it indicates that the total system is performing the rod pulling operation. At this time, the lifting movement and the horizontal movement are locked, and at the same time, the lubrication system maintains the lubrication action.

[0071] Implementation method of self-locking mode two: When the horizontal movement does not reach the extension limit, the lifting mechanism cannot perform the lifting movement. This self-locking mode is mainly used to protect the water tank and other parts of the equipment from collision.

[0072] Implementation method of self-locking mode three: When the lifting mechanism does not descend to the lowest position, the horizontal movement is prohibited from contracting / retracting.

[0073] Implementation method of self-locking mode four: When there is not enough water in the pure water tank to supply water to the painting water tank, the lubrication system is prohibited from working.

[0074] Implementation method of interlocking mode one: When the lubrication system in the lubrication water tank stops working, the fuel assembly assembly system stops working.

[0075] Implementation method of interlocking mode two: When the lifting mechanism is at the rod pulling layer, other equipment must match it to perform the rod pulling operation.

[0076] Implementation method of interlocking mode three: When the lifting mechanism and the telescopic system do not retract to the origin position, other equipment is prohibited from operating.

[0077] In short, the control system of the lubrication system is complex. On the premise of conforming to the production process flow of the fuel assembly, the purpose of setting the self-locking and interlocking programs is to comprehensively consider how to protect the fuel rod and the lubrication system from being knocked.

[0078] The above content is a further detailed description of the present invention in combination with specific preferred implementation manners. It cannot be determined that the specific implementation manners of the present invention are only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, other implementation manners obtained without departing from the technical solution of the present invention should be included within the protection scope of the corresponding invention.

Claims

1. A brushing assembly for fuel rod lubrication, comprising a brushing roller (9), and the brushing roller (9) includes a brush layer as the outer layer of the brushing roller (9), characterized in that, It also comprises a paddle (10), wherein the paddle (10) is a strip-shaped structure whose length direction is parallel to the length direction of the painting roller (9); One side of the plectrum (10) is embedded in the brush layer, and the plectrum (10) is made of an elastic material; The paddle (10) is arranged on the discharge side of the painting roller (9); During the rotation of the painting roller (9), the painting roller (9) can move the paddle (10) to vibrate continuously; There are two painting rollers (9), the two painting rollers (9) are parallel to each other, and the brush layers of the two painting rollers (9) are pressed against each other; Each painting roller (9) is matched with a paddle (10), and the paddles (10) and the painting rollers (9) that match each other have the following relationship: the paddles (10) are parallel to the painting rollers (9), and one side of the paddles (10) is embedded in the brush layer of the painting rollers (9); On the brushing assembly, one side of the mutually pressed position of the brush layers is a feed side for introducing the fuel rods, and the opposite side of the one side is a discharge side for leading the fuel rods out, and the paddles (10) are all arranged on the discharge side; The brush layer is a nylon layer or a sideburn layer.

2. The painting assembly for fuel rod lubrication according to claim 1, characterized in that, It also includes a painting water tank (5), and the paddle (10) and the painting roller (9) are both fixed on the painting water tank (5).

3. The painting assembly for fuel rod lubrication according to claim 2, wherein The painting water tank (5) is made of transparent material.

4. The painting assembly for fuel rod lubrication according to claim 2, wherein, It also includes a liquid level sensor (12) for checking the liquid level in the painting water tank (5).

5. The brushing assembly for fuel rod lubrication according to claim 2, characterized in that, It also includes an overflow hole arranged on the side wall of the painting water tank (5).

6. Lubrication system for fuel rod lubrication, characterized in that, It comprises the painting assembly as claimed in claim 1.

7. The lubrication system for fuel rod lubrication according to claim 6, characterized in that, It also comprises a pure water tank (1), a water pump (3), a painting water tank (5) and a waste water tank (8), wherein the painting assembly is arranged in the painting water tank (5), the water pump (3) is used to pump water in the pure water tank (1) into the painting water tank (5), an overflow hole is arranged on the side wall of the painting water tank (5), an overflow pipe (6) is arranged between the overflow hole and the waste water tank (8), and a drainage pipe (7) is also arranged between the bottom of the painting water tank (5) and the waste water tank (8).

8. The lubrication system for fuel rod lubrication according to claim 6, characterized in that, It also comprises a pure water tank (1), a water pump (3), and a painting water tank (5); the painting assembly is arranged in the painting water tank (5); the water pump (3) is used to pump water in the pure water tank (1) into the painting water tank (5); and a filter (2) is also arranged between the water pump (3) and the pure water tank (1).

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