CN114620501A - Self-cleaning feeding system for nuclear fuel pellet production line - Google Patents
Self-cleaning feeding system for nuclear fuel pellet production line Download PDFInfo
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- CN114620501A CN114620501A CN202011451698.0A CN202011451698A CN114620501A CN 114620501 A CN114620501 A CN 114620501A CN 202011451698 A CN202011451698 A CN 202011451698A CN 114620501 A CN114620501 A CN 114620501A
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- 239000008188 pellet Substances 0.000 title claims abstract description 56
- 238000004140 cleaning Methods 0.000 title claims abstract description 45
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 40
- 239000003758 nuclear fuel Substances 0.000 title claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 156
- 230000007246 mechanism Effects 0.000 claims abstract description 103
- 238000012216 screening Methods 0.000 claims abstract description 35
- 238000003860 storage Methods 0.000 claims abstract description 29
- 239000000428 dust Substances 0.000 claims abstract description 14
- 229910052770 Uranium Inorganic materials 0.000 claims abstract description 11
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000443 aerosol Substances 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 238000007599 discharging Methods 0.000 claims description 17
- 230000001681 protective effect Effects 0.000 claims description 16
- 230000009471 action Effects 0.000 claims description 9
- 239000002699 waste material Substances 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 7
- 238000012840 feeding operation Methods 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 4
- 239000013589 supplement Substances 0.000 claims description 4
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 12
- 230000036541 health Effects 0.000 abstract description 8
- 230000007306 turnover Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- 208000027418 Wounds and injury Diseases 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 208000014674 injury Diseases 0.000 description 3
- 230000007480 spreading Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
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- 230000005802 health problem Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/23—Devices for tilting and emptying of containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
- B08B15/026—Boxes for removal of dirt, e.g. for cleaning brakes, glove- boxes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/005—Feeding or manipulating devices specially adapted to grinding machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G21/00—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors
- B65G21/20—Means incorporated in, or attached to, framework or housings for guiding load-carriers, traction elements or loads supported on moving surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/02—Devices for feeding articles or materials to conveyors
- B65G47/04—Devices for feeding articles or materials to conveyors for feeding articles
- B65G47/12—Devices for feeding articles or materials to conveyors for feeding articles from disorderly-arranged article piles or from loose assemblages of articles
- B65G47/14—Devices for feeding articles or materials to conveyors for feeding articles from disorderly-arranged article piles or from loose assemblages of articles arranging or orientating the articles by mechanical or pneumatic means during feeding
- B65G47/1407—Devices for feeding articles or materials to conveyors for feeding articles from disorderly-arranged article piles or from loose assemblages of articles arranging or orientating the articles by mechanical or pneumatic means during feeding the articles being fed from a container, e.g. a bowl
- B65G47/1414—Devices for feeding articles or materials to conveyors for feeding articles from disorderly-arranged article piles or from loose assemblages of articles arranging or orientating the articles by mechanical or pneumatic means during feeding the articles being fed from a container, e.g. a bowl by means of movement of at least the whole wall of the container
- B65G47/1421—Vibratory movement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
- B65G69/12—Sieving bulk materials during loading or unloading
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention belongs to a feeding system, and particularly relates to a self-cleaning feeding system for a nuclear fuel pellet production line. The utility model provides a self-cleaning feeding system for nuclear fuel pellet production line, includes outer structure, interior structure, automatic business turn over material mechanism, automatic mechanism of falling the material, automatic screening mechanism, material temporary storage mechanism, automatic feed/feed mechanism, wherein outer structure is the shell of system, and other devices set up inside outer structure. The invention has the following remarkable effects: on the whole design, the system realizes the three-level sealing standard in the nuclear industry standard, and the uranium-containing material and the dust and aerosol generated by the uranium-containing material are thoroughly isolated from the operator from the design. And the inside self-cleaning air circulation system of equipment has solved the mill's new trend system amount of wind not enough, and the problem that the wind pressure is not enough can also produce little negative pressure in equipment inside simultaneously, prevents that dust and aerosol from escaping outward when door and window opens. The occupational health safety of the production site is globally guaranteed.
Description
Technical Field
The invention belongs to a feeding system, and particularly relates to a self-cleaning feeding system for a nuclear fuel pellet production line.
Background
Grinding is the final process of nuclear fuel pellet production, and aims to grind the size of the sintered nuclear fuel pellets to a specified size by using a centerless cylindrical grinder. After being sintered, the nuclear fuel is randomly and disorderly arranged in a container in bulk. Before entering the grinding machine, the pellet materials are passed through a feeding system to re-order and feed the pellet materials to the production line of the grinding machine.
Nuclear fuel pellet production lines at home and abroad generally adopt a vibrating disc to reintegrate scattered pellets, and the feeding process of a grinding production line is as follows: manually pouring the materials in the container into the equipment → temporarily storing the materials in the hopper → manually operating the linear vibrator for feeding → manually operating the vibration disc for feeding. The feeding system of the process is simple and reliable and is used by all nuclear fuel production plants for a long time. However, in recent years, with the development of nuclear power utilities, the production yield is also increased year by year. The problem that the process links depend on manual labor too much is increasingly revealed.
With the increasing safety requirements of the nuclear industry, the above-mentioned conventional grinding and feeding systems gradually expose some problems: firstly, artifical material intensity of labour that falls is big: the nuclear fuel pellet is a high-density material, and the mechanical safety risks such as smashing and the like exist in manual operation; secondly, occupational health hazards are large: a large amount of uranium-containing dust and uranium-containing aerosol generated during manual dumping are directly contacted with operators, and as the demand of nuclear power increases, the occupational health problem in the production process of nuclear fuel becomes more serious; thirdly, the critical safety is unreasonable: pile up the material when the hopper is kept in, not only the material piles up in a large number in the hopper, still can cause the card stifled, and need spray water lubrication when solving the card stifled, water is the moderator of nuclear trade strict control again, so the high volume piles up the common influence of material and moderator, and the critical safety problem of this technology link needs to be solved urgently.
In summary, the present invention is directed to solving the problems of mechanical safety, occupational health safety, and critical safety.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art and provides a self-cleaning feeding system for a nuclear fuel pellet production line.
The invention is realized by the following steps: the utility model provides a self-cleaning feeding system for nuclear fuel pellet production line, includes outer structure, interior structure, automatic business turn over material mechanism, automatic mechanism of falling the material, automatic screening mechanism, material temporary storage mechanism, automatic feed/feed mechanism, wherein outer structure is the shell of system, and other devices set up inside outer structure.
A self-cleaning feeding system for nuclear fuel pellet production lines as described above, wherein said configuration comprises all the automatic equipment inside a sealed enclosure designed to meet the requirements of the sealed enclosure tightness classification and its inspection method EJ/T1096-1999 level 3 sealing. On the protective cover, there are automatic door for automatic feeding and discharging, self-cleaning fan, wind pipe, air intake and exhaust for self-cleaning circulation, and facilities for connecting the interface of factory fresh air system and sealed door and window;
a set of self-cleaning system is designed in the equipment, and the system comprises an internal air suction/exhaust port, a self-cleaning fan, a nuclear-grade filter and a self-cleaning air pipe; when equipment operation, open from clean system always, the air constantly realizes purifying inside through this system, on the other hand: the flowing air generates micro negative pressure, and when the door and the window of the protective cover are opened, the radiation dust and the uranium-containing aerosol in the protective cover can be prevented from escaping;
the protective cover is provided with a local air exhaust interface with a fresh air system of the factory building.
The self-cleaning feeding system for the nuclear fuel pellet production line is characterized in that the internal structure comprises the following components of material dumping, screening, temporary storage, feeding and feeding so as to realize the production requirement of the nuclear fuel pellets.
The automatic feeding and discharging mechanism comprises a special tool driven by a ball screw, a material box filled with nuclear fuel pellets is manually placed on the tool, the material box on the tool is taken into equipment by the mechanism, and when the material is poured, an automatic door is closed and sealed; when the material pouring is completed, the automatic door is opened, and the empty material box is withdrawn from the device by the mechanism.
The self-cleaning feeding system for the nuclear fuel pellet production line comprises a feeding mechanism, a discharging mechanism, a screening mechanism and a servo motor, wherein the feeding mechanism is used for feeding materials to the feeding mechanism, the discharging mechanism is used for discharging materials, the feeding mechanism is used for feeding materials to the feeding mechanism, the screening mechanism is used for screening materials, and the feeding mechanism is used for feeding materials to the feeding mechanism.
The self-cleaning feeding system for the nuclear fuel pellet production line mainly comprises the vibrating motor, the screening box and the waste material box, wherein the vibrating motor is used for providing screening force, when pellet materials are automatically poured, the pellets flow into the screening area through the material flow channel of the screening box, and the nuclear fuel pellets are screened while being sent to the temporary storage mechanism under the combined action of the vibrating motor and gravity depending on the angle of the material channel. The rejected material that is sifted out is stored in a waste box.
The self-cleaning feeding system for the nuclear fuel pellet production line comprises a material temporary storage mechanism, wherein the material temporary storage mechanism mainly comprises a set of specially-made conveyor belts, the conveyor belts lay materials on the surfaces of the conveyor belts in temporary storage in order to ensure critical safety and prevent pellets from falling off, and the edge fences prevent the pellets from falling off.
The self-cleaning feeding system for the nuclear fuel pellet production line comprises an automatic feeding mechanism, a vibrating disc and a self-cleaning feeding mechanism, wherein the automatic feeding mechanism mainly comprises a material sensor, a vibrating disc and the automatic feeding mechanism. The material sensor detects the material condition in the vibrating disc through the photoelectric diffuse reflection principle: when the vibrating disc is short of materials, the control system automatically operates the temporary storage mechanism to supplement materials to the vibrating disc; when the materials in the vibrating disc meet the feeding and feeding requirements, the control system automatically stops the temporary storage mechanism to stop supplementing the materials, and the vibrating disc reorders the bulk materials and transmits the bulk materials to the automatic feeding mechanism. The automatic feeding mechanism utilizes the side-by-side duplex O-shaped conveyor belts to send the pellet materials into a grinding machine production line to complete feeding operation.
The invention has the following remarkable effects: on the whole design, the system realizes the three-level sealing standard in the nuclear industry standard, and the uranium-containing material and the dust and aerosol generated by the uranium-containing material are thoroughly isolated from the operator from the design. And the inside self-cleaning air circulation system of equipment has solved the mill's new trend system amount of wind not enough, and the problem that the wind pressure is not enough can also produce little negative pressure in equipment inside simultaneously, prevents that dust and aerosol from escaping outward when door and window opens. The occupational health safety of the production site is globally guaranteed.
In the aspect of local design, the automatic feeding and discharging mechanism, the automatic feeding mechanism and the automatic feeding mechanism in the system greatly avoid manual intervention of operators on the feeding system, greatly reduce the manual labor intensity and ensure the mechanical safety.
In the aspect of local design, the material temporary storage mechanism in the system adopts a mode of spreading materials, and the design essentially meets the critical safety requirement in a mode of accumulating materials temporarily in comparison with the traditional hopper, so that the critical safety of a production field is guaranteed.
In addition, the automatic material pouring mechanism and the automatic screening mechanism in the system effectively avoid direct contact of operators and materials, and greatly improve the occupational health safety of field operators.
Drawings
FIG. 1 shows an external structure of a self-cleaning feeding system
FIG. 2 is a front view of the automatic material pouring mechanism;
FIG. 3 is a left side view of FIG. 2;
fig. 4 is a top view of fig. 2.
Wherein 1 self-cleaning fan, 2 self-cleaning air pipe, 3 automatic door, 4 sealing protective cover, 5 sealing access door, 6 internal suction inlet, 7 nuclear grade filter, 8 internal air outlet, 9 fresh air interface, 10 sealing quick-opening cabin door, 11 servo motor, 12 locking support seat, 13 frame, 14 anchoring component, 15 material box locking device, 16 guide table, 17 guide support seat, 18 belt transmission component
Detailed Description
The technical scheme of the invention is described in detail in the following with reference to the accompanying drawings and specific examples.
(1) Design of outer structure
In the design of the structure, as shown in figure 1, all automatic equipment is in a sealed protective cover which meets the requirement of 3-grade sealing in a sealed cabinet sealing classification and a testing method EJ/T1096-1999. On the protective cover, an automatic door for automatic feeding and discharging is arranged, and the automatic door is used for self-cleaning circulating self-cleaning fan, air pipe, air inlet and air exhaust, and is connected with the interface of factory fresh air system and sealed doors and windows.
As shown in the attached figure 1, a set of self-cleaning system is designed in the equipment, and the system comprises an internal air suction/exhaust port, a self-cleaning fan, a nuclear grade filter and a self-cleaning air pipe. When equipment operation, open from clean system always, the air constantly realizes purifying inside through this system, on the other hand: the flowing air generates micro negative pressure, and when the door and the window of the protective cover are opened, the radiation dust and the uranium-containing aerosol in the protective cover can be prevented from escaping. The cleanness of the nuclear fuel pellet feeding operation is ensured.
In addition, the protective cover is provided with an office air exhaust interface with a factory fresh air system, so that the equipment can be deployed on the premise of not influencing the old fresh air system of an old production line, and convenience and possibility are provided for realizing the cleaning and automatic transformation of the old production line.
(2) Design of internal structure
In the aspect of internal structure design, in order to realize the functions of material pouring, screening, temporary storage, feeding and feeding required in the production of nuclear fuel pellets, the internal structure of the invention comprises the automatic mechanisms, thereby realizing the automation of feeding in the production process.
(3) Automatic feeding and discharging mechanism
The mechanism utilizes a special tool driven by a ball screw to manually place a material box filled with nuclear fuel pellets on the tool, and then the mechanism brings the material box on the tool into equipment. When the material is poured, the automatic door is closed and sealed; when the material pouring is completed, the automatic door is opened, and the empty material box is withdrawn from the device by the mechanism.
(4) Automatic material pouring mechanism
The mechanism utilizes a servo motor to provide power, is provided with a corresponding limiting sensor, sends a material box inside the equipment through an automatic feeding and discharging mechanism, overturns and pours the material through an automatic material pouring mechanism after reaching the position, pushes a material box cover open under the action of gravity, and flows into a screening mechanism, so that automatic material pouring is realized. Through servo drive, can set up the speed and the angle of falling the material according to the demand, satisfy any requirement of falling the material, stop personnel to contact the radiation dust that falls the material and produce.
(5) Automatic screening mechanism
The mechanism mainly comprises a vibrating motor, a screening box and a waste material box, wherein the vibrating motor provides screening force, when pellet materials are automatically poured, the pellets flow into a screening area through a material flow passage of the screening box, and under the combined action of the vibrating motor and gravity depending on the angle of the material flow passage, the nuclear fuel pellets are screened while being conveyed to the temporary storage mechanism. The rejected material that is sifted out is stored in a waste box. Thoroughly stop personnel and uranium-bearing material's contact when screening material.
(6) Material temporary storage mechanism
The mechanism mainly comprises a set of specially-made conveyor belts, in order to ensure critical safety and prevent the core blocks from falling, the conveyor belts lay the materials on the surfaces of the conveyor belts in a laying mode, and fences on the edges prevent the core blocks from falling. The mechanism thoroughly avoids the critical potential safety hazard caused by material accumulation.
(7) Automatic feeding/feeding mechanism
The mechanism mainly comprises a material sensor, a vibrating disc and an automatic feeding mechanism. The material sensor detects the material condition in the vibrating disc through the photoelectric diffuse reflection principle: when the vibrating disc is short of materials, the control system automatically operates the temporary storage mechanism to supplement materials to the vibrating disc; when the materials in the vibrating disc meet the feeding requirement, the control system automatically stops the temporary storage mechanism to stop supplementing the materials. The vibratory disks reorder and transfer bulk material to an automatic feeding mechanism. The automatic feeding mechanism utilizes the side-by-side duplex O-shaped conveyor belts to send the pellet materials into a grinding machine production line to complete feeding operation. According to the mechanism, the stacking height of materials in the vibrating disc is automatically controlled by equipment, so that critical safety risks or material waste caused by human errors is avoided.
The application device is used in the following process:
the feeding process of the system is as follows:
A. automatic feeding and discharging: the material container automatically enters the equipment, and the empty container after material pouring automatically exits from the equipment.
B. Automatic material pouring: after the container containing the material enters the equipment, the material is poured into the screening device in the sealed environment inside the equipment through the overturning of the automatic material pouring mechanism.
C. Automatic screening: the materials poured into the screening device are automatically screened, damaged pellets and dust in the materials are screened, and the complete pellets are transferred to the material temporary storage device.
D. Automatic spreading and temporary storage: the material temporary storage device tiles the screened materials to meet the critical safety geometric height and wait for feeding.
E. Automatic feeding: the temporary storage device automatically feeds materials to the vibrating disc without manual intervention, and the vibrating disc controls the temporary storage mechanism to feed materials according to the internal material quantity of the vibrating disc.
F. Automatic feeding: the vibration disc automatically adjusts parameters such as amplitude, vibration frequency and voltage of the feeding according to the material quantity of the vibration disc, the vibration characteristic of the output port and the material speed requirement, and real-time automatic control is achieved.
Further, in a, the automatic feeding and discharging device comprises a set of automatic door which is opened and closed up and down and is pressed and sealed on the sealing surface. When materials need to be fed in and out, the automatic door is opened upwards, and the interior of the equipment is communicated with the exterior; when the system realizes the operation of falling the material, this automatically-controlled door is closed downwards to compress tightly sealed face, inside and outside sealed of equipment, the inside aerosol and the dust that produces of equipment can't escape, guarantees occupational health safety in essence.
Further, in a, the automatic door of the automatic feeding and discharging device comprises a set of safety opposite-emitting light curtain linked with the driver. When the automatically-controlled door was opened, if there was the foreign matter to pass through the gate, safe light curtain sent sensing signal to alarm, reminded operating personnel supervisory equipment material business turn over, did not stretch into the first hand, avoided mechanical injury, guarantee mechanical safety.
Furthermore, in A, an emergency stop switch of the system is linked with the automatic door driver, when the automatic door is abnormal in action, an operator brakes the system through the emergency stop switch and cuts off the power intervention of the automatic door, so that mechanical injury is avoided, and mechanical safety is guaranteed.
Further, in A, after the system is started, the self-cleaning fan is started, the self-cleaning system automatically runs, the equipment and the outside form negative pressure, even if the door and the window of the equipment are opened, the aerosol and the dust in the equipment cannot escape, and the air is purified through the equipment.
Furthermore, in B, the automatic material pouring mechanism comprises a set of special tool designed for the container when pouring materials, and the container is fixed in the tool by the action of gravity in the overturning process, so that a large number of clamping mechanisms are omitted. Rely on the action of gravity to open the container lid automatically at the upset in-process, avoid artifical uncapping and material direct contact, ensured occupational health safety.
Furthermore, in B, the automatic material pouring mechanism comprises a set of closed-loop servo motor and a set of closed-loop control mechanism, so that the overturning speed and the overturning angle can be accurately controlled, and the materials in the container can be safely and stably fed into the feeding system. The manual operation is avoided, the labor intensity is greatly reduced, the risk of mechanical injury is reduced, and the mechanical safety is guaranteed from the essential design.
Further, in C, the screening mechanism comprises a screening box and a vibrating motor. On one hand, the materials in the screening box can realize micro-vibration under the action of the vibration motor, and the damaged core blocks and dust are screened; on the other hand, the material moves to the temporary storage device along with the vibration. Avoid artificial screening material, reduced uranium-bearing material and operating personnel's direct contact, promoted occupational health safety level.
Further, in C, the screening device contains a geometrically good waste bin. The screened damaged pellets and dust can be effectively collected, and the pellets are regularly cleaned and are high in critical safety. The working strength of cleaning materials by operators is reduced, and the occupational health safety level is improved.
Further, in D, the buffer mechanism comprises a conveyor belt for conveying in a horizontal direction. Make the system when the nuclear fuel pellet of keeping in, can spread the material flat and store in on the conveyer belt, avoided the pellet to pile up the critical potential safety hazard that causes on the one hand, on the other hand has improved the visuality to the inside material volume of equipment, has alleviateed intensity of labour to a certain extent.
Further, in E, the automatic feeding mechanism comprises a material sensor with filtering and anti-interference functions and is linked with the conveyor belt, and when the material sensor detects that the vibrating disc is short of materials, the feeding mechanism and the temporary storage mechanism are automatically started to supplement the materials to the vibrating disc. Greatly reducing the working strength of operators.
Furthermore, in F, the automatic feeding mechanism comprises a vibration disc controlled in a closed loop mode, so that the system can realize real-time frequency conversion control when conveying the pellets to the grinding-through, and the integration of automation and reliability of the equipment is met. The intervention of manual operation is greatly reduced.
Claims (8)
1. A self-cleaning feeding system for a nuclear fuel pellet production line is characterized in that: the automatic material feeding and discharging mechanism comprises an outer mechanism, an inner mechanism, an automatic material feeding and discharging mechanism, an automatic material pouring mechanism, an automatic screening mechanism, a material temporary storage mechanism and an automatic feeding mechanism, wherein the outer mechanism is a shell of the system, and other devices are arranged inside the outer mechanism.
2. A self-cleaning feeding system for nuclear fuel pellet production lines as claimed in claim 1, wherein: the described structure includes that all the automatic equipment is placed in a sealed protective cover, and said protective cover can meet the requirements of grade 3 sealing in sealed box chamber tightness classification and its detection method EJ/T1096-1999. The protective cover is provided with an automatic door for automatic feeding and discharging, a self-cleaning fan for self-cleaning circulation, an air pipe, air inlet and air exhaust, a connector for connecting a factory fresh air system, a sealed door and window and other facilities;
a set of self-cleaning system is designed in the equipment, and the system comprises an internal air suction/exhaust port, a self-cleaning fan, a nuclear-grade filter and a self-cleaning air pipe; when equipment operation, open from clean system always, the air constantly realizes purifying inside through this system, on the other hand: the flowing air generates micro negative pressure, and when the door and the window of the protective cover are opened, the radiation dust and the uranium-containing aerosol in the protective cover can be prevented from escaping;
the protective cover is provided with a local air exhaust interface with a fresh air system of the factory building.
3. A self-cleaning feeding system for nuclear fuel pellet production lines as claimed in claim 2, wherein: the internal structure comprises the following steps of material pouring, screening, temporary storage, feeding and loading, so that the production of the nuclear fuel pellets is realized.
4. A self-cleaning feeding system for nuclear fuel pellet production lines as claimed in claim 3, wherein: the automatic feeding and discharging mechanism comprises a special tool driven by a ball screw, wherein a material box filled with nuclear fuel pellets is manually placed on the tool by the special tool, the material box on the tool is taken into equipment by the special tool, and when the material is poured, an automatic door is closed and sealed; when the material pouring is finished, the automatic door is opened, and the empty material box is withdrawn from the device by the mechanism.
5. A self-cleaning feeding system for nuclear fuel pellet production lines as claimed in claim 4, wherein: the automatic material pouring mechanism comprises a servo motor, a corresponding limiting sensor is arranged, a material box inside the device is fed through the automatic material feeding and discharging mechanism, the material box is overturned and poured through the automatic material pouring mechanism after reaching a position, the material pushes a material box cover open under the action of gravity and flows into the screening mechanism, and therefore automatic material pouring is achieved.
6. A self-cleaning feeding system for nuclear fuel pellet production lines as claimed in claim 5, wherein: the automatic screening mechanism comprises a vibrating motor, a screening box and a waste material box, wherein the vibrating motor is used for providing screening force, when pellet materials are automatically poured, the pellets flow into a screening area through a material flow passage of the screening box, and the nuclear fuel pellets are screened while being conveyed to the temporary storage mechanism under the combined action of the vibrating motor and gravity depending on the angle of the material flow passage. The rejected material that is sifted out is stored in a waste box.
7. A self-cleaning feeding system for nuclear fuel pellet production lines as claimed in claim 6, wherein: the material temporary storage mechanism mainly comprises a set of specially-made conveyor belts, in order to ensure critical safety and prevent the core blocks from falling, the conveyor belts lay the materials on the surfaces of the conveyor belts in a flat mode during temporary storage, and the fences on the edges prevent the core blocks from falling.
8. A self-cleaning feeding system for nuclear fuel pellet production lines as claimed in claim 7, wherein: the automatic feeding/feeding mechanism comprises a material sensor, a vibrating disc and an automatic feeding mechanism. The material sensor detects the material condition in the vibrating disc through the photoelectric diffuse reflection principle: when the vibrating disc is short of materials, the control system automatically operates the temporary storage mechanism to supplement materials to the vibrating disc; when the materials in the vibrating disc meet the feeding and feeding requirements, the control system automatically stops the temporary storage mechanism to stop supplementing the materials, and the vibrating disc reorders the bulk materials and transmits the bulk materials to the automatic feeding mechanism. The automatic feeding mechanism utilizes the side-by-side duplex O-shaped conveyor belts to send the pellet materials into a grinding machine production line to complete feeding operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011451698.0A CN114620501B (en) | 2020-12-10 | 2020-12-10 | Self-cleaning feeding system for nuclear fuel pellet production line |
Applications Claiming Priority (1)
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