CN110030821B - Grain drying coaxial side-entering type mixed flow variable device - Google Patents
Grain drying coaxial side-entering type mixed flow variable device Download PDFInfo
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- CN110030821B CN110030821B CN201910340561.9A CN201910340561A CN110030821B CN 110030821 B CN110030821 B CN 110030821B CN 201910340561 A CN201910340561 A CN 201910340561A CN 110030821 B CN110030821 B CN 110030821B
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- fluted disc
- main pipeline
- openings
- circular fluted
- variable device
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/12—Velocity of flow; Quantity of flow, e.g. by varying fan speed, by modifying cross flow area
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
- F26B2200/06—Grains, e.g. cereals, wheat, rice, corn
Abstract
The invention relates to a coaxial side-in type mixed flow variable device for grain drying, which comprises a main pipeline, a rotary side air inlet flow cover, an air inlet adjusting gear disc set, a support, a stepping motor and a negative pressure fan, wherein the rotary side air inlet flow cover consists of an arc-shaped outer shell, a spiral blade and a cylindrical inner shell; the air inlet adjusting gear disc group comprises a circular gear disc and a driving gear; the cylindrical inner shell is fixedly sleeved at the inlet end of the main pipeline, the main pipeline is uniformly provided with inner openings, the inner openings are symmetrically distributed on the same circumference, the circular fluted disc is sleeved outside the main pipeline, teeth of the circular fluted disc are exposed out of the edge of the tail end of the arc-shaped outer shell, the circular fluted disc is uniformly provided with outer openings, and the inner openings can be completely closed and opened by the circular fluted disc in the rotating process; the stepping motor is connected with a driving gear, and the driving gear is meshed with the circular fluted disc. The invention has simple structure and light weight, can realize the uniform mixing of air flow in an extremely short length, has low energy consumption, mixes under a negative pressure state and has no loss of substances.
Description
Technical Field
The invention relates to cold and hot air flow mixing in a grain drying process or high-efficiency and accurate mixing of different component gases in the chemical industry, in particular to a coaxial side-in type mixed flow variable device for grain drying.
Background
Along with the improvement of the intelligent mechanical equipment level in China, the control on the grain post-production treatment machinery is more required to be accurate, and the control demand of moisture of wet grains on the temperature of the heating airflow is very strict because the grain quality is poor due to overheating in the grain drying process. The temperature of the hot air is greatly influenced by a combustion medium, and particularly in the variable-temperature drying process, the temperature or the components of the air need to change along with the change of the grain characteristic signals to realize real-time accurate change. The requirements on the robustness and the mixed state of the heat supply mixed flow device are high.
Especially in the mixing process of different component gases, the gas is required to be uniformly mixed in a short distance after entering the air supply device, the separation phenomenon is avoided, the difficulty is high, the control precision can be met in the subsequent gas use process, and no real-time and accurate control can be realized at present. However, the size of the flow mixing device is required to be limited to a small size range due to the influence of production environment conditions, so that the device is required to be small in size. And the cost of the process needs to be controlled. Under the condition that the mixed gas flow is unstable, the precision of the mixed components is improved, and the robustness of the gas components is improved.
Disclosure of Invention
The invention aims to provide a grain drying coaxial side-in type mixed flow variable device which is used for solving the problems of overlarge device and uneven mixing in the air flow mixing process in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: the grain drying coaxial side-entering mixed flow variable device comprises a main pipeline, a rotary side-entering airflow cover, an air inlet adjusting gear disc set, a support, a stepping motor and a negative pressure fan, wherein the rotary side-entering airflow cover consists of an arc-shaped outer shell, a spiral blade and a cylindrical inner shell, and the arc-shaped outer shell and the cylindrical inner shell are connected by the spiral blade; the air inlet adjusting gear disc group comprises a circular gear disc and a driving gear; the cylindrical inner shell is fixedly sleeved at the inlet end of a main pipeline, the main pipeline is uniformly provided with inner openings, the inner openings are symmetrically distributed on the same circumference, a circular fluted disc is sleeved outside the main pipeline, teeth of the circular fluted disc are exposed from the edge of the tail end of the arc-shaped outer shell, the circular fluted disc is uniformly provided with outer openings, the outer openings are symmetrically distributed on the same circumference, the inner openings and the outer openings have the same size and are staggered in the circumferential direction, and the circular fluted disc can completely seal and open the inner openings in the rotating process; the bracket is provided with a cylinder, a fixed platform is arranged on the cylinder, a stepping motor is arranged on the fixed platform and is connected with a driving gear, the driving gear is meshed with a circular fluted disc, limit switches are arranged on two sides of the motor fixed platform, and the limiting radian distance is equal to the circumferential angle of the outer opening; the outlet end of the main pipeline is provided with a negative pressure fan.
Set up two stop screw on the circular fluted disc among the above-mentioned scheme, two stop screw and the closed region between two outer openings set up correspondingly, realize circumference pivoted spacing.
In the scheme, the opening and closing degrees of the closed area between the inner opening on the main body channel and the two outer openings on the circular fluted disc are equal on the circumference, and the complete coincidence of the opening and the closed opening can be realized.
In the scheme, the helical blades guide external airflow to enter a space formed by a closed area between the two outer openings and the inner opening along the outer wall of the arc-shaped shell, and the main pipeline is connected with the rotating side airflow inlet cover through bolts or rivets or welding.
The width of the driving gear in the scheme is far greater than that of the air inlet adjusting gear disc.
The length of interior opening equals with the confined area distance between two interior openings in the trunk line among the above-mentioned scheme, and the symmetric distribution.
In the scheme, the number of the helical blades and the inner opening are distributed in a multiple manner.
The invention has the following beneficial effects:
1. the invention has simple structure and light weight, and can realize uniform mixing of air flow in extremely short length.
2. The invention has low production cost and does not need an additional supporting device in the installation process.
3. The invention has high controllability, sensitivity and reliability, and has good robustness in cooperation with a sensor and a controller, so that the air with different components can be uniformly mixed in a short time, and the rotation angle of the air inlet adjusting fluted disc set can be adjusted in real time along with the change of a grain characteristic signal, thereby adjusting the air inflow outside the main pipeline in a short time, and enabling the uniformity and the temperature index of the mixed air components to reach preset requirements.
4. The invention utilizes the characteristics of the flowing air flow in the negative pressure state, fully utilizes the flowing tangential force of the air flow along the helical blade and the arc-shaped shell, and promotes the mixing of the air flow.
Drawings
FIG. 1 is an installation view of the present invention;
FIG. 2 shows the distribution of the positions of the main body supporting pipes and the openings according to the present invention;
FIG. 3 is a schematic view of a rotating side inlet shroud of the present apparatus;
FIG. 4 is a schematic view of a circular gear plate and a limit screw according to the present invention;
FIG. 5 is a schematic structural view of a stent according to the present invention;
FIG. 6 is a schematic view of the connection relationship between the main pipe and the circular fluted disc of the present invention
FIG. 7 is a diagram of the relationship between the circular gear and the bracket of the present invention
FIG. 8 is a graph of the relationship of the rounded tooth and the arcuate shell of the present invention.
In the figure: the device comprises a main pipeline 1, a rotating side air inlet cover 2, an air inlet adjusting gear disc set 3, a support 4, a stepping motor 5, an inner opening 6, a closed area between two inner openings 7, an arc-shaped outer shell 8, a helical blade 9, a cylindrical inner shell 10, an air inlet chamfer 11, an outer opening 12, a left limit screw 13, a right limit screw 14, a fixed platform 15, a limit switch 16, a motor fixed frame 17, a drive gear 18 and a circular fluted disc 19.
Detailed Description
The invention is further described with reference to the accompanying drawings in which:
referring to fig. 1-8, the grain drying coaxial side-entering mixed flow variable device comprises a main pipe 1, a rotating side-entering airflow cover 2, an air inlet adjusting gear disc set 3, a support 4, a stepping motor 5 and a negative pressure fan, wherein the rotating side-entering airflow cover 2 is composed of an arc-shaped outer shell 8, a helical blade 9 and a cylindrical inner shell 10, the arc-shaped outer shell 8 and the cylindrical inner shell 10 are connected by the helical blade 9, and an air inlet chamfer 11 is arranged at the inlet end of the cylindrical inner shell 10; the air inlet adjusting gear disc set 3 comprises a circular fluted disc 19 and a driving gear 18; the cylindrical inner shell 10 is fixedly sleeved at the inlet end of the main pipeline 1, the support 4 is provided with a cylinder, a fixed platform 15 is arranged on the cylinder, the stepping motor 5 is installed on the fixed platform 15 through a motor fixing frame 17, the stepping motor 5 is connected with a driving gear 18, and the driving gear 18 is meshed with a circular fluted disc 19. The outlet end of the main pipeline 1 is provided with a negative pressure fan. The main pipeline 1 and the rotating side enter the airflow cover 2 to form a matching sliding transfer groove for axial limiting, and the width of the driving gear 18 is far greater than that of a circular fluted disc.
The main pipeline 1 is provided with inner openings 6 which are symmetrically distributed along the circumference, the inner openings 6 are symmetrically distributed on the circumference, the area of the inner openings 6 is equal to the area of a closed area 7 between the two inner openings, the outer edge of the position of the inner openings 6 of the main pipeline is provided with an air inlet adjusting gear disc set 3 which has the same size with the openings and has the same area with the non-opening areas, and an over-fit sliding indexing pair is formed. Circular fluted disc 19 suit is outside trunk line 1, circular fluted disc 19's tooth exposes from 8 terminal edges of arc shell, circular fluted disc 19 evenly sets up outer opening 12, each outer opening 12 is symmetric distribution on same circumference, interior opening 6 and the same size of outer opening 12, set up along the crisscross setting of circumferencial direction, circular fluted disc 19 can realize rotating under drive gear 18's drive action, make the closed area on the circular fluted disc 19 and the interior opening 6 realization relative rotation on the trunk line 1, it is variable to reach 6 areas of interior opening on the trunk line 1, the messenger is in the air current that flows in trunk line 1 and mixes from the air current that interior opening 6 located the entering.
The motor is arranged on the motor fixing frame 17 and is provided with a limiting device, so that the corner of the adjusting fluted disc is only the arc length of a closed area. And the bracket 4 plays a role of fixing with the rear duct, and can be connected using a bolt.
The rotary side inlet airflow cover 2 is arranged at the front end of the opening of the pipeline, a spiral guide drainage mechanism is embedded in the rotary side inlet airflow cover, and the rotary side inlet airflow cover is connected with a main pipeline by using bolts or rivets or welding and is relatively static with the pipeline and the support 4. Under the suction of the negative pressure fan, the airflow passes through the static helical blade 9, so that the airflow can enter the opening on the pipeline in a rotating manner, enters the inner diameter along the periphery of the pipeline, and under the action of the helix, the airflow of the outside component and the airflow of the inside component are mixed in a rotating manner.
The upper opening of the main pipeline 1 is the same as the closed area and is symmetrically distributed, and the front end and the rear end of the main pipeline can be connected and installed with the existing pipeline. The opening area is selectively designed according to the mixing ratio of the components of the gas flow. Circular fluted disc 19 is at rotatory in-process, and the closed region between two outer openings on the circular fluted disc 19 can coincide completely with interior opening 6, makes trunk line 1 become the closure state, and inside only has the air current in the trunk line to flow, and under step motor 5's drive, transmits for circular fluted disc 19 through drive gear 18, drives circular fluted disc 19 and rotates. Realize opening and closing. The right limit screw 14 and the left limit screw 13 realize the limit of the circular rotation. Helical blade 9 can make the air current carry out helical motion, gets into the passageway that opening 6 and circular fluted disc group closed area constitute in the trunk line, and the opening degree can be adjusted through the motor in this region of ventilating, makes the air current of different components can realize homogeneous mixing in the extremely short scope.
The circular fluted disc 19 is provided with a limiting screw, and the angle of the intersecting line of the limiting screw and the circle center is equal to two angles of the closed area.
Fixed platform 15's both sides set up limit switch 16, and spacing radian distance equals outer opening 12's circumference angle, and at the rotation in-process, when rotating the full open mode, left side limit switch is closed, and the fluted disc can only rotate right under the drive of electrical apparatus gear this moment and begin to close the opening. When the device is in a fully-closed state, the right limit switch is touched, the fluted disc can only rotate to the left under the drive of the gear of the electric appliance to start to close the opening, and the left airflow component is equal to the rear component passing through the device in the fully-closed state. The steering drive of the motor is used in cooperation with an external controller and a sensor located behind the motor.
The rear part of the bracket 4 can be connected with a rear pipeline to play a role of supporting.
The air flow rotation drives the shell, which is also a key component in the scheme, the shell is arc-shaped, and the joint of the inner side of the shell and the inner diameter pipeline is connected and supported through the spiral blades 9. Under the guide of the arc-shaped shell 8 and the helical blades 9, the airflow rotates to enter the inner diameter pipeline, so that the airflow is uniformly mixed in a very short interval. The number of the helical blades 9 is multiplied with the number of the openings on the inner diameter pipeline. The spiral blades 9 can select the rotating direction according to different positions of the area where the equipment is located, and the size of the design of the outer pipeline is selected according to the component change interval and the environment.
The invention can instantly and uniformly mix the airflows with different temperatures or components, and the airflows with different temperatures or components enter from the inner diameter of the left-end main pipeline 1 and the rotating side airflow inlet cover 2 respectively. When the air flow parameters in the main pipeline 1 are not ideal, the driving component is matched with the temperature (concentration) sensor for feedback, the air inflow is adjusted, the rotation angle of the fluted disc is adjusted, the air inflow on the outer diameter side is controlled, and premixing adjustment is carried out. The air current is used under the cooperation of negative pressure fan in whole mixing process, and the outside of main pipeline 1 equals atmospheric pressure, and the inboard is less than atmospheric pressure. In the mixing process, the circular fluted disc rotates in real time in a coupling controller driving motor, so that the uniformity or component consistency of the airflow of the main body supporting pipeline after mixed flow is controlled. The coaxial side-in type flow mixing device is small in size, capable of achieving real-time adjustment, simple in component, easy to machine and low in machining precision requirement. The components of the mixed gas flow are uniform and consistent, and the gas flow is driven by the static gas flow rotating blades in the rotating gas flow cover to rotate to enter the main flow pipeline, so that the mixing of the gas flow is further accelerated, and the mixing length and time are reduced. High controllable precision, low energy consumption, mixing under negative pressure and no loss of material.
Claims (7)
1. The utility model provides a coaxial side income formula mixed flow variable device of grain stoving which characterized in that: the grain drying coaxial side-entering mixed flow variable device comprises a main pipeline (1), a rotating side air inlet flow cover (2), an air inlet adjusting gear disc set (3), a support (4), a stepping motor (5) and a negative pressure fan, wherein the rotating side air inlet flow cover (2) consists of an arc-shaped outer shell (8), a spiral blade (9) and a cylindrical inner shell (10), and the arc-shaped outer shell (8) and the cylindrical inner shell (10) are connected through the spiral blade (9); the air inlet adjusting gear disc set (3) comprises a circular fluted disc (19) and a driving gear (18); the cylindrical inner shell (10) is fixedly sleeved at the inlet end of a main pipeline (1), the main pipeline (1) is uniformly provided with inner openings (6), each inner opening (6) is symmetrically distributed on the same circumference, a circular fluted disc (19) is sleeved outside the main pipeline (1), teeth of the circular fluted disc (19) are exposed from the edge of the tail end of an arc-shaped outer shell (8), the circular fluted disc (19) is uniformly provided with outer openings (12), each outer opening (12) is symmetrically distributed on the same circumference, the inner openings (6) and the outer openings (12) have the same size and are arranged in a staggered mode along the circumferential direction, and the circular fluted disc (19) can completely seal and open the inner openings (6) in the rotating process; the support (4) is provided with a cylinder, a fixed platform (15) is arranged on the cylinder, the stepping motor (5) is installed on the fixed platform (15), the stepping motor (5) is connected with a driving gear (18), the driving gear (18) is meshed with a circular fluted disc (19), limit switches (16) are arranged on two sides of the fixed platform (15), and the limiting radian distance is equal to the circumferential angle of the outer opening (12); the outlet end of the main pipeline (1) is provided with a negative pressure fan.
2. The grain drying coaxial side-in type mixed flow variable device of claim 1, characterized in that: two limit screws are arranged on the circular fluted disc (19), and the two limit screws are arranged corresponding to the closed area between the two outer openings, so that the limitation of circumferential rotation is realized.
3. The grain drying coaxial side-in type mixed flow variable device of claim 2, characterized in that: the opening and closing degree of a closed area between the inner opening (6) on the main pipeline and the two outer openings on the circular fluted disc (19) on the circumference is equal, and the complete coincidence of the opening and the closing can be realized.
4. The grain drying coaxial side-in type mixed flow variable device of claim 3, characterized in that: the spiral blade (9) guides external airflow to enter a space formed by a closed area between the two outer openings and the inner opening (6) along the outer wall of the arc-shaped shell (8), and the main pipeline (1) is connected with the rotating side airflow inlet cover (2) through bolts or rivets or welding.
5. The grain drying coaxial side-in type mixed flow variable device of claim 4, characterized in that: the width of the driving gear (18) is far larger than that of the circular fluted disc.
6. The grain drying coaxial side-in type mixed flow variable device of claim 5, characterized in that: the length of the upper inner opening (6) of the main pipeline is equal to the distance of a closed area (7) between the two inner openings, and the two inner openings are symmetrically distributed.
7. The grain drying coaxial side-in type mixed flow variable device of claim 6, characterized in that: the number of the helical blades (9) and the number of the inner openings (6) are distributed in a multiple manner.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910340561.9A CN110030821B (en) | 2019-04-25 | 2019-04-25 | Grain drying coaxial side-entering type mixed flow variable device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910340561.9A CN110030821B (en) | 2019-04-25 | 2019-04-25 | Grain drying coaxial side-entering type mixed flow variable device |
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| CN110030821A CN110030821A (en) | 2019-07-19 |
| CN110030821B true CN110030821B (en) | 2020-06-19 |
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| CN201910340561.9A Active CN110030821B (en) | 2019-04-25 | 2019-04-25 | Grain drying coaxial side-entering type mixed flow variable device |
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|---|---|---|---|---|
| WO1998044836A1 (en) * | 1997-04-07 | 1998-10-15 | Heidenfelder, Roland | Grain mill with a millstone grinding gear |
| CN101755901A (en) * | 2009-12-25 | 2010-06-30 | 王志军 | Totally closed energy-saving three-folded linkage type grain crop quick drying and dust removing machine |
| CN102578224A (en) * | 2012-03-12 | 2012-07-18 | 铁岭市清河区金锋干燥设备有限公司 | Concurrent and mixed flow grain drying tower |
| CN202489137U (en) * | 2012-03-12 | 2012-10-17 | 铁岭市清河区金锋干燥设备有限公司 | Concurrent-mixed flow grain drying tower |
| CN103438015A (en) * | 2013-08-05 | 2013-12-11 | 苏州欧拉工程技术有限公司 | High-efficiency and energy-saving double suction fan |
| CN108518984A (en) * | 2018-05-03 | 2018-09-11 | 淄博电炉厂 | Horizontal double ribbon roller-type resistance furnace systems and its technological process |
-
2019
- 2019-04-25 CN CN201910340561.9A patent/CN110030821B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998044836A1 (en) * | 1997-04-07 | 1998-10-15 | Heidenfelder, Roland | Grain mill with a millstone grinding gear |
| CN101755901A (en) * | 2009-12-25 | 2010-06-30 | 王志军 | Totally closed energy-saving three-folded linkage type grain crop quick drying and dust removing machine |
| CN102578224A (en) * | 2012-03-12 | 2012-07-18 | 铁岭市清河区金锋干燥设备有限公司 | Concurrent and mixed flow grain drying tower |
| CN202489137U (en) * | 2012-03-12 | 2012-10-17 | 铁岭市清河区金锋干燥设备有限公司 | Concurrent-mixed flow grain drying tower |
| CN103438015A (en) * | 2013-08-05 | 2013-12-11 | 苏州欧拉工程技术有限公司 | High-efficiency and energy-saving double suction fan |
| CN108518984A (en) * | 2018-05-03 | 2018-09-11 | 淄博电炉厂 | Horizontal double ribbon roller-type resistance furnace systems and its technological process |
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