CN112473532A - Automatic cleaning device and cleaning method for vertical mixer blade - Google Patents
Automatic cleaning device and cleaning method for vertical mixer blade Download PDFInfo
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- CN112473532A CN112473532A CN202011354406.1A CN202011354406A CN112473532A CN 112473532 A CN112473532 A CN 112473532A CN 202011354406 A CN202011354406 A CN 202011354406A CN 112473532 A CN112473532 A CN 112473532A
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- paddle
- cylinder
- scraper
- blade
- vertical mixer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/10—Maintenance of mixers
- B01F35/12—Maintenance of mixers using mechanical means
- B01F35/123—Maintenance of mixers using mechanical means using scrapers for cleaning mixers
Abstract
The invention provides an automatic cleaning device and a cleaning method for a vertical mixer blade. The device and the method realize the cleaning of the mixing pan paddle and improve the operation safety.
Description
Technical Field
The invention relates to the field of production and manufacturing of composite solid propellants, in particular to an automatic cleaning device and a cleaning method for a vertical mixer blade.
Background
The vertical mixer is a special electromechanical integrated production device which is necessary to be reduced in the production process of rocket engine charging solid propellant (propellant for short), and can fully mix different types of solid and liquid chemical raw materials required in the propellant through the device to finally obtain propellant slurry with uniformly distributed material components meeting the process requirements.
The vertical mixer mainly comprises a transmission case, paddles, a frame, a mixing pot and the like, which are shown in figure 1, wherein the mechanical transmission structure of the transmission case is mainly a planetary gear system consisting of two parts of paddle rotation and revolution, and the working principle is that a motor drives an internal gear system of the transmission case, and the planetary gear drives each paddle to rotate (rotate) around the axis of the paddle and simultaneously revolve around a revolving inner gear ring so as to meet the mixing requirement of the paddles on propellant. The blade is a double-end large-lead special-shaped screw, and the mixing treatment such as extrusion, dispersion, stirring and the like of various raw materials is completed through the mutual matching of the screw surfaces of the blade. The paddle structure is divided into solid paddles and hollow paddles, the number of the paddles is configured to be 3, and the configuration mode of the paddles is hollow paddles, solid paddles and hollow paddles, and is shown in figure 2. The main function of the frame is to support and fix the transmission case and lift the mixing pot by the lifting mechanism on the frame to complete the ascending and descending. The mixing pot is an open container for placing various raw materials, and is used for mixing after ascending and discharging after descending through the lifting mechanism.
Because the propellant slurry contains a certain proportion of viscous liquid components, residual slurry in various states can be adhered to the surface of the blade in the mixing process or after the mixing is finished, and the residual slurry needs to be cleaned and removed continuously, otherwise the components of the slurry are not uniform, and the final quality of the slurry is not up to the standard. Therefore, timely cleaning of the slurry adhered to the blades is an indispensable operation link in the mixing operation process. The method adopted at present is that an operator stands at a flange of an upper opening of a descending mixing pot and holds an explosion-proof cleaning shovel by hand. Because propellant slurry is a flammable and explosive dangerous chemical product, besides the dangerous factors of the propellant slurry, the volatile gas and floating dust of the propellant slurry have certain damage and pollution to operators and the field environment, and therefore, an automatic device with the functions of remote control, man-machine isolation, process automation and the like is needed to be adopted to realize the blade cleaning of the vertical mixer.
Disclosure of Invention
The invention aims to provide an automatic cleaning device and a cleaning method for a vertical mixer blade, which can be used for cleaning the mixing pan blade and improving the operation safety.
In order to solve the technical problem, the technical scheme includes that the automatic cleaning device for the vertical mixer blade comprises an operation platform, wherein a lifting cylinder is arranged on the operation platform, a mounting flat plate is arranged at the telescopic end of the lifting cylinder, a scraper cylinder is arranged on the mounting flat plate, a fixed seat is arranged at the telescopic end of the scraper cylinder, a scraper pair is hinged with the fixed seat through a hinge, the scraper pair comprises two scrapers attached to the blade, and involute gear structures meshed with each other are arranged at the end portions of the two scrapers.
In the preferred scheme, the operating platform is provided with a guide rail, the lifting cylinder is arranged on the mounting base plate, the bottom of the mounting base plate is provided with a sliding block matched with the guide rail, the operating platform is provided with a conveying cylinder, and the telescopic end of the conveying cylinder is connected with the mounting base plate.
In the preferred scheme, the end part of the lifting cylinder is provided with a guide plate, the guide plate is provided with a guide sleeve, the guide column is matched with the guide sleeve, and the guide column is connected with the installation flat plate.
In the preferred scheme, a horizontal guide cylinder is arranged on the installation flat plate, a horizontal guide column is arranged on one side of the fixing seat, and the horizontal guide column is matched with the horizontal guide cylinder.
In the preferred scheme, a group of first sensors are arranged at the bottom of a transmission case of the vertical mixer, and a group of second sensors are arranged on the installation flat plate.
The invention also provides a cleaning method of the automatic cleaning device for the vertical mixer blade, which comprises the following steps:
firstly, adjusting a blade to be cleaned to an optimal position;
step two, starting the conveying cylinder to enable the mounting bottom plate to move, starting the lifting cylinder to extend and starting the scraper blade cylinder to extend, and enabling the scraper blade to be tightly attached to the spiral surface of the paddle blade;
step three, the paddle starts to rotate, and the lifting cylinder retracts to the initial position;
retracting the scraper cylinder, rotating the paddle by 180 degrees, rotating the other side of the paddle to one side of the scraper pair, extending the lifting cylinder to enable the scraper pair to be positioned at the upper end of the paddle, extending the scraper cylinder out, and enabling the scraper to be tightly attached to the spiral surface of the paddle;
step five, the paddle starts to rotate, and the lifting cylinder retracts to the initial position;
and step six, retracting the scraper cylinder, extending the lifting cylinder to enable the scraper pair to be positioned at the upper end of the paddle, enabling the paddle to revolve for 180 degrees and rotate at the same time, enabling the other paddle to be adjusted to the optimal position, and repeating the operation steps two to five to finish cleaning.
Preferably, in the first step, the adjustment of the optimal position is determined according to the first sensor and the second sensor.
According to the movable mixing pot in-situ overturning and discharging device and the operation method thereof, provided by the invention, the blades can be automatically cleaned without the close-range operation of an operator, the labor intensity of the on-site operator is greatly reduced due to the realization of the automatic blade cleaning technology, the intrinsic safety of the mixing operation process is improved, the harm to the health of the operator caused by dangerous chemical products contained in the direct view is reduced, and the guarantee is provided for the comprehensive realization of automation and intellectualization of the operation process in a dangerous operation place.
Drawings
The invention is further illustrated with reference to the accompanying drawings and examples:
FIG. 1 is a schematic view of the vertical mixer;
FIG. 2 is a schematic view of the whole structure of the present invention'
FIG. 3 is a top view of the present invention;
FIG. 4 is a schematic detail view at A of FIG. 3;
FIG. 5 is a schematic detail view of the point B in FIG. 4;
FIG. 6 is a schematic blade to plate position;
FIG. 7 is a developed view of a lead outside diameter helix of the blade;
FIG. 8 is a schematic projection view of a first sensor and a second sensor;
FIG. 9 is a schematic illustration of a pneumatic control system;
FIG. 10 is a schematic illustration of the operational steps of the cleaning process;
in the figure: the device comprises an operating platform 1, a lifting cylinder 2, an installation flat plate 3, a scraper cylinder 4, a fixed seat 5, a paddle 6, a scraper 7, a hinge 8, a guide rail 9, an installation bottom plate 10, a sliding block 11, a conveying cylinder 12, a guide plate 13, a guide sleeve 14, a guide column 15, a horizontal guide cylinder 16, a horizontal guide column 17, a first sensor 18, a second sensor 19, a transmission case 20, a rack 21, a mixing pot 22 and an involute gear structure 701.
Detailed Description
As shown in fig. 2-5, an automatic cleaning device of vertical mixer paddle, including operation platform 1, be equipped with lift cylinder 2 on operation platform 1, lift cylinder 2's flexible end is equipped with installation flat board 3, is equipped with scraper blade cylinder 4 on the installation flat board 3, and scraper blade cylinder 4's flexible end is equipped with fixing base 5, and the scraper blade is vice to be articulated with fixing base 5 through hinge 8, and the scraper blade is vice to include two scraper blades 7 with the laminating of paddle 6, and two scraper blade 7 tip are equipped with intermeshing's involute gear structure 701. The scraper pair is composed of two parts which can swing around a fixed seat hinge as a circle center, and the joint tangent point of the two scrapers 7 is a group of involute gear meshing structures, so that the scraper pair can be automatically adjusted when being attached to the paddle 6, and the size interference caused by the mutual position error generated in the alignment process is avoided.
Preferably, the operating platform 1 is provided with a guide rail 9, the lifting cylinder 2 is arranged on the mounting base plate 10, the bottom of the mounting base plate 10 is provided with a sliding block 11 matched with the guide rail 9, the operating platform 1 is provided with a conveying cylinder 12, and the telescopic end of the conveying cylinder 12 is connected with the mounting base plate 10.
The installation bottom plate 10 is driven by the conveying cylinder 12 to move along the guide rail 9, so that the device is horizontally conveyed integrally, and the horizontal starting position of the scraper is adjusted.
Preferably, the end of the lifting cylinder 2 is provided with a guide plate 13, the guide plate 13 is provided with a guide sleeve 14 through the guide plate 13, the guide column 15 is matched with the guide sleeve 14, and the guide column 15 is connected with the installation flat plate 3.
Through the cooperation of uide bushing 14 and guide post 15, realize the guide positioning to lift cylinder 2, improve lift stability.
The installation is equipped with horizontal guide cylinder 16 on the dull and stereotyped 3, and fixing base 5 one side is equipped with horizontal guide post 17, and horizontal guide post 17 cooperates with horizontal guide cylinder 16.
Through the cooperation of horizontal guide post 17 and horizontal guide cylinder 16, have direction and prevent deflecting the function, prevent that the scraper blade is vice to take place to rotate when moving along with the scraper blade cylinder.
The working principle of the automatic blade cleaning equipment is as follows: the blade 6 is a double-head large-pitch special-shaped screw, and has the main characteristic dimensions of common threads, such as an outer diameter D, a bottom diameter D, a lead t, a helix angle gamma and the like, and the outer diameter helix at one lead is unfolded as shown in fig. 7. The working principle of the blade cleaning equipment to be developed is explained by taking a motion mode of a group of studs and nuts combined as an example. When the stud rotates anticlockwise or clockwise, the nut can complete upward or downward movement along with the rotation of the stud, and the upward or downward movement is one of the ways of converting the rotary movement into the linear movement in a typical mechanical structure. When a tangent plane perpendicular to the axis of the stud is made at any position in the thickness direction of the nut, the movement direction of the whole tangent plane and any point in the tangent plane is consistent with that of the nut. By means of the working principle of the combination of the stud and the nut, a thin-wall flat plate which has a profile consistent with the profile and is tightly attached to the outer side of the spiral surface on one side of the paddle can be placed on the outer side of the spiral surface on one side of the paddle, when the paddle completes autorotation, the flat plate completes linear motion of the paddle from top to bottom in the effective lead of the paddle, and the positions of the paddle and the thin-wall flat plate are schematically shown in figure 6. According to the movement principle of the stud and the nut, when the thin-wall flat plate is taken as a scraper with a cleaning function, the cleaning work of residual slurry adhered to the surface of the paddle can be realized.
The profiles on the two sides of the blade have the same profile curve when mutually rotating for 180 degrees. Therefore, after the scraper 7 finishes the cleaning work on one helicoid, the blade is rotated by 180 degrees, and then the residual slurry on the blade profile is cleaned again by taking the upper end of the other side of the blade as a starting point and the lower end as an end point, and finally the cleaning work on the two helicoids of the whole blade is finished.
Preferably, the bottom of the transmission box of the vertical mixer is provided with a group of first sensors 18, and the installation plate 3 is provided with a group of second sensors 19.
The projections of the first sensor 18 and the second sensor 19 are shown in fig. 8.
The first sensor 18 and the second sensor 19 are both photosensors. The first sensor 18 controls the in-position condition of the shaft part of the blade, and the second sensor 19 controls the in-position condition of the helicoid of the blade.
The model type of the photoelectric sensor is a focusing type, the on-off state of signals is 'off' when light is not shielded and 'on' when the light is shielded, the rotation and revolution of the paddle are respectively completed under the condition that the first sensor 18 and the second sensor 19 respectively meet 'off', and meanwhile, the signals on the display screen of the remote control console indicate that the adjustment of the paddle is in place, so that the next operation can be carried out.
The middle paddle is a solid paddle and is repeatedly engaged by the hollow paddles at two sides without dead angles in the mixing process, the helicoid has a self-cleaning function, and the cleaning by adopting a mechanical cleaning mode is not considered any more.
A cleaning method of an automatic cleaning device for a vertical mixer blade is characterized by comprising the following steps:
step one, adjusting the paddle to be cleaned to the optimal position.
The optimal working position of the blade in the control system refers to the working position of the blade to be cleaned, and is limited by the following conditions: (1) the mounting position of the automatic paddle cleaning device is limited by the fact that the two sides of the vertical mixer are provided with the racks, the front of the vertical mixer is provided with the mixing pot inlet and outlet channels, and only the rear area of the vertical mixer has mounting conditions; (2) the horizontal moving distance of the scraper pair is shortest: considering from the index that the cantilever deflection value under the action of external force is minimum when the piston rod of the scraper cylinder 4 is at the maximum extension length, the distance from the initial position of the scraper pair to the screw surface of the blade is minimized as much as possible; (3) the position of the outer curve of the screw surface of the blade is as follows: the stop position of the top external curve of the screw surface of the blade and the curve of the scraper auxiliary tool can be in a seamless fit state; (4) avoid mutual interference between the paddle: the transmission mode of the blades is rotation and revolution, namely, the rotation is that the hollow propeller gear is driven by the solid propeller gear, and the solid propeller and the hollow blades are driven to revolve together through the internal gear of the transmission box and the external tooth external transmission structure. The paddle and the paddle, the inner wall of the paddle and the mixing pot, the bottom of the paddle and the mixing pot and the like are all provided with certain gap sizes so as to ensure the safety of the mixing process, and the cleaning operation is arranged in the area between the rotating position of the paddle and the inner wall of the mixing pot as the area between the paddles and the paddles is the area where the respective helicoids are mutually meshed; (5) ensuring the detection accuracy of the cleaning position of the blade: as the paddle is a key part of the vertical mixer, the excircle dimensional accuracy grade of the handle part and the spiral section of the paddle is 7 grades, and the surface roughness is 0.8 mu m, the consistency, the accuracy and the reliability of the detected standard when the external surface is used as a reference object can be ensured. The optimal operating position of the blade is therefore shown in fig. 8.
The adjustment of the optimal position is judged according to the first sensor 18 and the second sensor 19, the rotation and revolution of the blades are respectively completed under the condition that the first sensor 18 and the second sensor 19 respectively meet the 'off' condition, and meanwhile, the signal on the display screen of the remote control console indicates that the blades are adjusted in place, so that the next operation can be carried out.
Step two, starting the conveying cylinder 12 to enable the mounting bottom plate 10 to move, starting the lifting cylinder 2 to extend and the scraper blade cylinder 4 to extend, and enabling the scraper blade 7 to be tightly attached to the spiral surface of the paddle 6;
step three, the paddle 6 starts to rotate, and the lifting cylinder 2 retracts to the initial position;
step four, the scraper cylinder 4 retracts, the paddle 6 rotates 180 degrees, the other side of the paddle rotates to one side of the scraper pair, meanwhile, the lifting cylinder 2 extends to enable the scraper pair to be located at the upper end of the paddle 6, and the scraper cylinder 4 extends out to enable the scraper 7 to be tightly attached to the spiral surface of the paddle 6;
step five, the paddle 6 starts to rotate, and the lifting cylinder 2 retracts to the initial position;
and step six, the scraper cylinder 4 retracts, the lifting cylinder 2 extends to enable the scraper pair to be positioned at the upper end of the paddle 6, the paddle 6 revolves for 180 degrees and rotates at the same time, the other paddle 6 is adjusted to the optimal position, and the steps two to five are repeated to finish cleaning.
Specifically, as shown in fig. 10, after the scraper 7 is tightly attached to the helicoid of the paddle 6, the paddle 6 starts to rotate, stops after the rotation angle is-2.75 circles, and simultaneously retracts the lifting cylinder 2 to the initial position while the paddle rotates, and the descending distance is H (the distance of H is determined according to the length of the paddle); the scraper cylinder 4 retracts to an initial position, and the retraction distance is M (the distance of M is determined according to the distance from the initial position of the scraper cylinder to the paddle); the paddle is started to rotate, the vehicle is stopped after the rotation angle is minus 2.59 circles, meanwhile, the lifting cylinder 2 extends, the lifting distance is H, the scraper blade cylinder 4 extends by a distance M, and the scraper blade is closely attached to the other spiral surface of the paddle; the paddle is started to rotate, the vehicle is stopped after the rotation angle is 2.75 circles, meanwhile, the lifting cylinder 2 retracts to the initial position when the paddle rotates, and the descending distance is H; the scraper cylinder 4 retracts to an initial position, and the retraction distance is M; the lifting cylinder 2 extends, and the lifting distance is H; and starting the blades to rotate, stopping after the rotation angle is minus 2.59 circles, revolving the blades while rotating, enabling the other blade to rotate to the optimal cleaning position, and repeating the subsequent operation.
Claims (7)
1. The utility model provides an automatic cleaning device of vertical mixer paddle, a serial communication port, including operation platform (1), be equipped with lift cylinder (2) on operation platform (1), the flexible end of lift cylinder (2) is equipped with installation flat board (3), be equipped with scraper blade cylinder (4) on installation flat board (3), the flexible end of scraper blade cylinder (4) is equipped with fixing base (5), the scraper blade is vice to be articulated with fixing base (5) through hinge (8), scraper blade is vice to include two scraper blades (7) with paddle (6) laminating, two scraper blade (7) tip are equipped with intermeshing's involute gear structure (701).
2. The automatic cleaning device for the vertical mixer blade according to claim 1, wherein the operating platform (1) is provided with a guide rail (9), the lifting cylinder (2) is arranged on the mounting base plate (10), the bottom of the mounting base plate (10) is provided with a slide block (11) matched with the guide rail (9), the operating platform (1) is provided with a conveying cylinder (12), and the telescopic end of the conveying cylinder (12) is connected with the mounting base plate (10).
3. The automatic cleaning device for the vertical mixer blade according to claim 1, characterized in that the end of the lifting cylinder (2) is provided with a guide plate (13), the guide plate (13) is provided with a guide sleeve (14), the guide post (15) is matched with the guide sleeve (14), and the guide post (15) is connected with the mounting plate (3).
4. The automatic cleaning device for the vertical mixer blade according to claim 1, characterized in that the mounting plate (3) is provided with a horizontal guide cylinder (16), one side of the fixed seat (5) is provided with a horizontal guide post (17), and the horizontal guide post (17) is matched with the horizontal guide cylinder (16).
5. An automatic cleaning device for vertical mixer blades according to claim 1, characterized in that the bottom of the transmission box of the vertical mixer is provided with a set of first sensors (18) and the mounting plate (3) is provided with a set of second sensors (19).
6. A cleaning method of an automatic cleaning device for a vertical mixer blade is characterized by comprising the following steps:
firstly, adjusting a blade to be cleaned to an optimal position;
secondly, starting a conveying cylinder (12) to enable the mounting bottom plate (10) to move, starting a lifting cylinder (2) to extend and a scraper cylinder (4) to extend, and enabling a scraper (7) to cling to the spiral surface of the paddle (6);
thirdly, the paddle (6) starts to rotate, and the lifting cylinder (2) retracts to the initial position;
fourthly, the scraper cylinder (4) retracts, the paddle (6) rotates 180 degrees, the other side of the paddle rotates to one side of the scraper pair, meanwhile, the lifting cylinder (2) extends to enable the scraper pair to be located at the upper end of the paddle (6), and the scraper cylinder (4) extends out to enable the scraper (7) to be tightly attached to the spiral surface of the paddle (6);
step five, the paddle (6) starts to rotate, and the lifting cylinder (2) retracts to the initial position;
and step six, the scraper cylinder (4) retracts, the lifting cylinder (2) extends to enable the scraper pair to be positioned at the upper end of the paddle (6), the paddle (6) revolves for 180 degrees and rotates at the same time, the other paddle (6) is adjusted to the optimal position, and the steps two to five are repeated to finish cleaning.
7. A method of cleaning an automatic cleaning device for vertical mixer blades according to claim 6, characterized in that in step one, the adjustment of the optimum position is determined on the basis of the first sensor (18) and the second sensor (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011354406.1A CN112473532B (en) | 2020-11-26 | 2020-11-26 | Automatic cleaning device and cleaning method for vertical mixer blade |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011354406.1A CN112473532B (en) | 2020-11-26 | 2020-11-26 | Automatic cleaning device and cleaning method for vertical mixer blade |
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| Publication Number | Publication Date |
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| CN112473532A true CN112473532A (en) | 2021-03-12 |
| CN112473532B CN112473532B (en) | 2023-01-31 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114213199A (en) * | 2021-12-14 | 2022-03-22 | 湖北航天化学技术研究所 | Cleaning material and method for cleaning high-burning-rate solid propellant adhered in mixing equipment |
| CN114559417A (en) * | 2022-01-28 | 2022-05-31 | 湖南航智科技有限公司 | Kneading machine paddle automatic cleaning robot system based on 3D vision |
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| CN208260597U (en) * | 2018-04-13 | 2018-12-21 | 常州市宏寰机械有限公司 | A kind of inner wall automatic cleaning apparatus of single shaft mixing machine |
| CN209038479U (en) * | 2018-10-25 | 2019-06-28 | 杭州华新机电工程有限公司 | A kind of dispenser drive mechanism of spiral coal unloader |
| CN209615795U (en) * | 2018-12-27 | 2019-11-12 | 福州福田工艺品有限公司 | A kind of circle plate outer surface cleaning device |
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| US20070140053A1 (en) * | 2005-11-18 | 2007-06-21 | Valmar Global Vse Za Sladoled D.O.O. | Mixing member for blenders |
| CN201006417Y (en) * | 2007-02-12 | 2008-01-16 | 黄寿兴 | Dirty-scraping type extrusion mechanism of wet process granule extrusion machine |
| CN208260597U (en) * | 2018-04-13 | 2018-12-21 | 常州市宏寰机械有限公司 | A kind of inner wall automatic cleaning apparatus of single shaft mixing machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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