Nuclear fuel cladding pipe orifice cleaning equipment

Abstract

The invention provides nuclear fuel cladding tube opening cleaning equipment. The nuclear fuel cladding tube opening cleaning equipment comprises a cloth belt winding device, a cloth belt unwinding device and a tube opening wiping device connected between the cloth belt winding device and the cloth belt unwinding device. The pipe opening wiping device comprises a wiping head transverse moving motor, a wiping device mounting plate, a servo electric cylinder, a wiping head, a swing air cylinder, a wiping head telescopic air cylinder and a telescopic device guide rail. The wiping head is installed on the swing air cylinder and used for extending a cloth belt towards the pipe opening direction of any nuclear fuel cladding pipe in the multiple nuclear fuel cladding pipes on the secondary assembly tray to be tightly attached to the pipe opening under driving of the wiping head transverse moving motor and rotating under driving of the swing air cylinder to complete pipe opening wiping of the nuclear fuel cladding pipes. The wiping head extends out of the cloth belt to be tightly attached to the pipe opening and then performs rotary wiping, so that the technical problem that according to an existing method, after a single element is clamped, a cotton rope penetrates into the pipe opening to perform rotary wiping, and the wiping efficiency is low is solved.

Description

Technical Field

[0001] The present application belongs to the technical field of nuclear fuel cladding tube orifice cleaning, and specifically relates to a nuclear fuel cladding tube orifice cleaning device. Background Art

[0002] The welding of the end plug and the cladding tube adopts the pressure resistance welding method, which has high requirements on the cleanliness of the groove before welding. At present, the production line uses manual wiping to clean the groove, which has a high risk of cross contamination, a lot of repetitive labor for personnel, and affects production efficiency.

[0003] The patent "An automatic tube mouth wiping device for nuclear fuel assembly" of China Aviation Manufacturing Technology Research Institute, application number CN202410008236.3, application date 2024.01.03, application publication number CN117711644A, uses a rotary clamping mechanism to clamp the cladding tube, and uses a cotton rope to penetrate the tube mouth for rotary wiping. This method is to use a cotton rope to penetrate the tube mouth for rotary wiping after clamping a single element, and the wiping efficiency is low. Summary of the invention

[0004] In view of this, the present application is dedicated to providing a nuclear fuel cladding tube orifice cleaning device, which solves the technical problem of low wiping efficiency in the existing method of clamping a single element and then using a cotton rope to penetrate into the tube orifice for rotational wiping by arranging a wiping head to extend the cloth belt until it is close to the tube orifice for rotational wiping.

[0005] The present application provides a nuclear fuel cladding tube nozzle cleaning device, which includes a cloth tape winding device, a cloth tape unwinding device, and a nozzle wiping device connected between the cloth tape winding device and the cloth tape unwinding device. The cloth tape winding device is used to wind up the used cloth tape and replace the new cloth tape for the wiping position. The cloth tape unwinding device is used to provide continuous tension for the new cloth tape during the wiping process. The nozzle wiping device includes a wiping head transverse movement motor, a wiping device mounting plate, a servo electric cylinder, a wiping head, a swing cylinder, a wiping head telescopic cylinder, and a telescopic device guide rail. The wiping device mounting plate is fixedly connected to the cloth tape winding device. The servo electric cylinder, the wiping head, the swing cylinder, the wiping head telescopic cylinder, and the telescopic device guide rail are all installed below the wiping device mounting plate. The wiping head transverse movement motor is installed at the front end of the wiping device mounting plate, and is used to rotate and drive the servo electric cylinder to move forward and backward. The telescopic device guide rail is installed on the servo electric cylinder. The telescopic cylinder of the wiping head is used to drive the swing cylinder to move forward and backward along the guide rail of the telescopic device when extending and retracting. The swing cylinder is used to swing along the circumferential direction of the wiping head. The wiping head is installed on the swing cylinder, and is used to extend the cloth belt toward the tube mouth of any nuclear fuel cladding tube among the multiple nuclear fuel cladding tubes on the secondary assembly tray under the drive of the wiping head transverse motor until it is close to the tube mouth, and rotate under the drive of the swing cylinder to complete the wiping of the tube mouth of the nuclear fuel cladding tube.

[0006] In a specific embodiment of the present application, the cloth tape winding device includes a coupling, a first stepper motor, a cloth tape winding shaft, a cloth tape fixing pin, a first sensor, a distance measuring wheel, a plurality of limit blocks, a plurality of first fixed shafts and a device fixing block. The cloth tape fixing pin is used to fix the used cloth tape on the cloth tape winding shaft. The cloth tape winding shaft is connected to the stepper motor through a coupling, and the first stepper motor is used to rotate and drive the cloth tape winding shaft to rotate when powered on to wind the used cloth tape around the cloth tape winding shaft, thereby realizing the function of winding up the old cloth tape. The limit block is arranged on the first fixed shaft. The plurality of first fixed shafts are fixed to the wiping device mounting plate by screws, and the cloth tape unwinding device is connected to the first fixed shaft through the device fixing block.

[0007] In a specific embodiment of the present application, the cloth tape winding device further comprises a first upper cover plate and a first lower cover plate. The used cloth tape is installed between the first upper cover plate and the first lower cover plate.

[0008] In a specific embodiment of the present application, the cloth tape unwinding device includes a second fixed shaft, a guide bearing, a second sensor, a second stepper motor, a clamping rod, a cloth tape fixing slot, a rotating shaft and a ratchet device. The clamping rod is used to push out the cloth tape fixing slot card when rotating to fix the new cloth tape on the rotating shaft. The ratchet device is installed on the rotating shaft and is connected to the second stepper motor through gears. The second stepper motor is used to rotate when powered on to drive the ratchet device to rotate, and the rotational force is transmitted to the new cloth tape through the rotating shaft, providing continuous tension for the new cloth tape during the wiping process.

[0009] In a specific embodiment of the present application, the cloth tape unwinding device further includes a second upper cover plate and a second lower cover plate. The new cloth tape is installed between the second upper cover plate and the second lower cover plate.

[0010] In a specific embodiment of the present application, the number of the cloth tape winding device, the cloth tape unwinding device and the tube mouth wiping device is 2 each, so as to form two sets of cleaning devices, one set of cleaning devices is used to clean one end of the tube mouth of the nuclear fuel cladding tube, and the other set of cleaning devices is used to simultaneously clean the other end of the tube mouth of the nuclear fuel cladding tube.

[0011] In a specific embodiment of the present application, the material of the cloth tape is cotton cloth.

[0012] The beneficial effect of the technical solution of the present application is that: through the cloth tape winding device, the cloth tape unwinding device and the tube mouth wiping device, the nuclear fuel cladding tube mouth is wiped by the coordinated action of the wiping head transverse movement motor, the wiping device mounting plate, the servo electric cylinder, the wiping head, the swing cylinder, the wiping head telescopic cylinder and the telescopic device guide rail in the tube mouth wiping device, so as to realize the automatic cleaning of the cladding tube mouth before the end plug welding, and the wiping head is set to rotate under the drive of the swing cylinder to complete the wiping of the nuclear fuel cladding tube mouth, so as to realize the deep cleaning of the cladding tube mouth and improve the cleanliness of the tube mouth. In addition, compared with the method of rotating and wiping the cotton rope deep into the tube mouth, the contact area between the cloth tape and the tube mouth is larger, and the secondary assembly tray is used to lift multiple nuclear fuel cladding tubes at one time, so as to avoid clamping a nuclear fuel cladding tube each time for cleaning, which is conducive to improving the wiping efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Shown is a schematic structural diagram of a nuclear fuel cladding tube orifice cleaning device provided in one embodiment of the present application.

[0014] Figure 2 Shown is a schematic structural diagram of a tube orifice wiping device in a nuclear fuel cladding tube orifice cleaning device provided in one embodiment of the present application.

[0015] Figure 3 Shown is a structural schematic diagram of a cloth tape winding device in a nuclear fuel cladding tube orifice cleaning device provided in one embodiment of the present application.

[0016] Figure 4 Shown is a schematic structural diagram of a cloth tape unwinding device in a nuclear fuel cladding tube orifice cleaning device provided in one embodiment of the present application.

[0017] Figure 5 Shown Figure 4 A schematic diagram of the partially enlarged structure of the cloth tape unwinding device in the illustrated embodiment. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] At least one embodiment of the present application provides a nuclear fuel cladding tube orifice cleaning device, referring to Figure 1 and Figure 2The nuclear fuel cladding tube nozzle cleaning device includes a cloth tape reeling device 01, a cloth tape unwinding device 02, and a nozzle wiping device 03 connected between the cloth tape reeling device 01 and the cloth tape unwinding device 02. The cloth tape reeling device 01 is used to reel in the used cloth tape and replace the new cloth tape 207 for the wiping position. The cloth tape unwinding device 02 is used to provide continuous tension for the new cloth tape 207 during the wiping process. The nozzle wiping device 03 includes a wiping head transverse motor 301, a wiping device mounting plate 302, a servo electric cylinder 303, a wiping head 304, a swing cylinder 305, a wiping head telescopic cylinder 306, and a telescopic device guide rail 307. The wiping device mounting plate 302 is fixedly connected to the cloth tape reeling device 01. The servo electric cylinder 303, the wiping head 304, the swing cylinder 305, the wiping head telescopic cylinder 306, and the telescopic device guide rail 307 are all installed below the wiping device mounting plate 302. The wiping head transverse motor 301 is installed at the front end of the wiping device mounting plate 302, and is used to rotate and drive the servo electric cylinder 303 to move forward and backward. The telescopic device guide rail 307 is installed on the servo electric cylinder 303. The wiping head telescopic cylinder 306 is used to drive the swing cylinder 305 to move forward and backward along the telescopic device guide rail 307 when extending and retracting. The swing cylinder 305 is used to swing along the circumferential direction of the wiping head 304. The wiping head 304 is installed on the swing cylinder 305, and is used to extend the cloth belt to the tube mouth of any nuclear fuel cladding tube among the multiple nuclear fuel cladding tubes on the secondary assembly tray under the drive of the wiping head transverse motor 301 until it is close to the tube mouth, and rotate under the drive of the swing cylinder 305 to complete the wiping of the nuclear fuel cladding tube mouth.

[0020] It should be noted that each component such as the wiping head transverse movement motor 301, the servo electric cylinder 303, the swing cylinder 305 and the wiping head telescopic cylinder 306 can be provided with a programmable controller, an automatic control unit, pneumatic and electric components, so as to realize the automated processing process of each component. As long as the corresponding functions can be achieved, on this basis, the embodiment of the present application does not limit the specific structure of each component such as the wiping head transverse movement motor 301, the servo electric cylinder 303, the swing cylinder 305 and the wiping head telescopic cylinder 306.

[0021] According to the technical solution provided in the embodiment of the present application, the wiping of the nuclear fuel cladding tube orifice is completed by the coordinated actions of the wiping head transverse motor 301, the wiping device mounting plate 302, the servo electric cylinder 303, the wiping head 304, the swing cylinder 305, the wiping head telescopic cylinder 306 and the telescopic device guide rail 307 in the tube orifice wiping device 03, so as to realize the automatic cleaning of the cladding tube orifice before the end plug welding, and the wiping head 304 is set to rotate under the drive of the swing cylinder 305 to complete the wiping of the nuclear fuel cladding tube orifice, so as to realize the deep cleaning of the cladding tube orifice and improve the cleanliness of the tube orifice. In addition, compared with the method of rotating and wiping the cotton rope deep into the tube orifice, the contact area between the cloth belt and the tube orifice is larger, and the secondary component tray is used to lift multiple nuclear fuel cladding tubes at one time, so as to avoid clamping a nuclear fuel cladding tube each time for cleaning, which is conducive to improving the wiping efficiency.

[0022] In at least one embodiment of the present application, the material of the cloth tape is cotton cloth. Thus, when the nuclear fuel cladding tube nozzle cleaning device is used in the production of heavy water reactor fuel elements, since the wall of the secondary assembly tube is coated with graphite, there is a lot of graphite pollution near the nozzle, and wiping with cotton rope is likely to cause secondary pollution. Therefore, the cotton cloth used as the wiping material in the present application can effectively avoid secondary pollution to the nozzle during the wiping process.

[0023] It should be noted that the cloth tape can be a part of the nuclear fuel cladding tube nozzle cleaning device, or it can be an adapter outside the nuclear fuel cladding tube nozzle cleaning device itself and purchased separately. The embodiments of the present application do not specifically limit this.

[0024] In at least one embodiment of the present application, Figure 3 As shown, the cloth tape winding device 01 includes a coupling 104, a first stepper motor 105, a cloth tape winding shaft 106, a cloth tape fixing pin 107, a first sensor 108, a distance measuring wheel 109, a plurality of limit blocks 110, a plurality of first fixed shafts 111 and a device fixing block 112. The cloth tape fixing pin 107 is used to fix the used cloth tape 102 on the cloth tape winding shaft 106. The cloth tape winding shaft 106 is connected to the stepper motor 105 through the coupling 104. The first stepper motor 105 is used to rotate and drive the cloth tape winding shaft 106 to rotate when powered on to wind the used cloth tape 102 around the cloth tape winding shaft 106, so as to realize the function of winding the old cloth tape. The limit block 110 is arranged on the first fixed shaft 111. The plurality of first fixed shafts 111 are fixed to the wiping device mounting plate 302 via screws, and the cloth tape unwinding device 02 is connected to the first fixed shafts 111 via a device fixing block 112 .

[0025] In at least one embodiment of the present application, the tape winding device 01 further includes a first upper cover plate 101 and a first lower cover plate 103. The used tape 102 is installed between the first upper cover plate 101 and the first lower cover plate 103. In this way, the position of the used tape 102 is limited and protected by the first upper cover plate 101 and the first lower cover plate 103.

[0026] In at least one embodiment of the present application, Figure 4 and Figure 5 As shown, the cloth tape unwinding device 02 includes a second fixed shaft 201, a guide bearing 202, a second sensor 203, a second stepping motor 204, a clamping rod 205, a cloth tape fixing slot 208, a rotating shaft 210, and a ratchet device 211. The clamping rod 205 is used to push out the cloth tape fixing slot 208 card when rotating, and fix the new cloth tape 207 on the rotating shaft 210. The ratchet device 211 is installed on the rotating shaft 210 and is connected to the second stepping motor 204 through gear matching. The second stepping motor 204 is used to rotate when powered on to drive the ratchet device 211 to rotate, and transmit the rotational force to the new cloth tape 207 through the rotating shaft 210, so as to provide continuous tension for the new cloth tape 207 during the wiping process.

[0027] In at least one embodiment of the present application, the tape unwinding device 02 further includes a second upper cover plate 206 and a second lower cover plate 209. The new tape 207 is installed between the second upper cover plate 206 and the second lower cover plate 209. In this way, the position of the new tape 207 is limited and protected by the second upper cover plate 206 and the second lower cover plate 209.

[0028] In at least one embodiment of the present application, the number of the cloth tape reeling device 01, the cloth tape unreeling device 02 and the tube opening wiping device 03 are all two, so as to form two sets of cleaning devices, one set of cleaning devices is used to clean one end of the tube opening of the nuclear fuel cladding tube, and the other set of cleaning devices is used to clean the other end of the tube opening of the nuclear fuel cladding tube at the same time. In this way, both ends of the tube opening of the nuclear fuel cladding tube can be cleaned and wiped at the same time, thereby improving the wiping efficiency.

[0029] Below, in conjunction with specific embodiments, the working principle of the nuclear fuel cladding tube orifice cleaning device provided by the embodiments of the present application is illustrated.

[0030] After the secondary component tray reaches the groove wiping position, the secondary component is lifted and positioned. Driven by the stepper motor 105, the cloth belt reeling device 01 rotates clockwise to reel in the used cloth belt and replace the new cloth belt for the wiping position. The cloth belt is located between the wiping head 304 and the pipe mouth. At the same time, the cloth belt unwinding device 02 rotates counterclockwise driven by the stepper motor 204, and the tension is continuously provided to the cloth belt through the ratchet device 211. The wiping head 304 moves to the center position with the pipe mouth driven by the wiping head transverse motor 301. The wiping head 304 is extended toward the pipe mouth driven by the wiping head telescopic cylinder 306, so that the cloth belt is close to the pipe mouth. Driven by the swing cylinder 305, the wiping head 304 first rotates 90° clockwise and then 90° counterclockwise to complete the wiping of a single pipe mouth. After wiping is completed, the wiping head 304 is retracted away from the pipe mouth driven by the wiping head telescopic cylinder 306, so that the cloth belt is separated from the pipe mouth, and then the wiping head 304 is moved to the centering position of the next pipe mouth driven by the wiping head transverse motor 301 to wipe the next sub-component pipe mouth, and this process is repeated until the wiping of 18 sub-component pipe mouths is completed.

[0031] For example, the sub-assembly tray can hold multiple components (for example, 18 components) at one time, and can position multiple components at one time and wipe both ends of the component nozzles at the same time, further improving the wiping efficiency. In addition, the cladding tube precise positioning device can also be used in conjunction with the cladding tube precise positioning device to achieve precise positioning of the cladding tube and ensure the stability of nozzle wiping.

[0032] It should be noted that the combination of the various technical features in the embodiments of the present application is not limited to the combination described in the embodiments of the present application or the combination described in the specific embodiments, and all technical features described in the present application can be freely combined or combined in any way unless there is a contradiction between them.

[0033] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the term "comprising" only indicates that the steps and elements that have been clearly identified are included, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0034] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0035] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A nuclear fuel cladding tube orifice cleaning device, characterized in that: It includes a cloth tape winding device, a cloth tape unwinding device and a pipe opening wiping device connected between the cloth tape winding device and the cloth tape unwinding device. The cloth tape rewinding device is used to rewind the used cloth tape and replace the new cloth tape for the wiping position; the cloth tape unwinding device is used to provide continuous tension for the new cloth tape during the wiping process; The pipe mouth wiping device includes a wiping head transverse movement motor, a wiping device mounting plate, a servo electric cylinder, a wiping head, a swing cylinder, a wiping head telescopic cylinder and a telescopic device guide rail; the wiping device mounting plate is fixedly connected to the cloth tape winding device, and the servo electric cylinder, the wiping head, the swing cylinder, the wiping head telescopic cylinder and the telescopic device guide rail are all installed below the wiping device mounting plate; the wiping head transverse movement motor is installed at the front end of the wiping device mounting plate, and is used to rotate and drive the servo electric cylinder to move forward and backward; the telescopic device guide rail is installed on the servo electric cylinder; the wiping head telescopic cylinder is used to drive the swing cylinder to move forward and backward along the telescopic device guide rail when extending and retracting; the swing cylinder is used to swing along the circumferential direction of the wiping head; the wiping head is installed on the swing cylinder, and is used to extend the cloth tape to the pipe mouth direction of any nuclear fuel cladding tube among the multiple nuclear fuel cladding tubes on the secondary assembly tray under the drive of the wiping head transverse movement motor until it is close to the pipe mouth, and rotate under the drive of the swing cylinder to complete the wiping of the nuclear fuel cladding tube mouth.

2. A nuclear fuel cladding tube orifice cleaning device according to claim 1, characterized in that: The cloth tape winding device comprises a coupling, a first stepping motor, a cloth tape winding shaft, a cloth tape fixing pin, a first sensor, a distance measuring wheel, a plurality of limit blocks, a plurality of first fixing shafts and a device fixing block. The cloth tape fixing pin is used to fix the used cloth tape on the cloth tape winding shaft; the cloth tape winding shaft is connected to the stepper motor through a coupling, and the first stepper motor is used to rotate and drive the cloth tape winding shaft to rotate when power is turned on to wind the used cloth tape around the cloth tape winding shaft, thereby realizing the function of winding up the old cloth tape; the limit block is arranged on the first fixed shaft; multiple first fixed shafts are fixed to the wiping device mounting plate by screws, and the cloth tape unwinding device is connected to the first fixed shaft through the device fixing block.

3. A nuclear fuel cladding tube orifice cleaning device according to claim 2, characterized in that: The cloth tape winding device also includes a first upper cover plate and a first lower cover plate, and the cloth tape is installed between the first upper cover plate and the first lower cover plate.

4. The nuclear fuel cladding tube orifice cleaning device according to claim 1, characterized in that: The cloth tape unwinding device includes a second fixed shaft, a guide bearing, a second sensor, a second stepper motor, a clamping rod, a cloth tape fixing slot, a rotating shaft and a ratchet device; the clamping rod is used to push out the cloth tape fixing slot card when rotating to fix the new cloth tape on the rotating shaft; the ratchet device is installed on the rotating shaft and is connected to the second stepper motor through gears; the second stepper motor is used to rotate when powered on to drive the ratchet device to rotate, and transmit the rotational force to the new cloth tape through the rotating shaft, thereby providing continuous tension for the new cloth tape during the wiping process.

5. A nuclear fuel cladding tube orifice cleaning device according to claim 4, characterized in that: The cloth tape unwinding device also includes a second upper cover plate and a second lower cover plate; a new cloth tape is installed between the second upper cover plate and the second lower cover plate.

6. The nuclear fuel cladding tube orifice cleaning device according to claim 1, characterized in that: The number of the cloth tape reeling device, the cloth tape unreeling device and the tube mouth wiping device are all 2, so as to form two sets of cleaning devices; one set of cleaning devices is used to clean one end of the tube mouth of the nuclear fuel cladding tube, and the other set of cleaning devices is used to simultaneously clean the other end of the tube mouth of the nuclear fuel cladding tube.

7. A nuclear fuel cladding tube orifice cleaning device according to any one of claims 1 to 6, characterized in that: The material of the cloth belt is cotton cloth.

Images