CN216941293U - Feeding device and mixing plant - Google Patents
Feeding device and mixing plant Download PDFInfo
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- CN216941293U CN216941293U CN202220351244.4U CN202220351244U CN216941293U CN 216941293 U CN216941293 U CN 216941293U CN 202220351244 U CN202220351244 U CN 202220351244U CN 216941293 U CN216941293 U CN 216941293U
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Abstract
The utility model provides a feeding device and a mixing station, wherein the feeding device comprises: the feeding assembly is installed at the top of the stirring main machine and comprises a plurality of feed openings, each feed opening in the plurality of feed openings is communicated with the stirring cylinder of the stirring main machine, and the plurality of feed openings are respectively arranged towards a plurality of different positions in the stirring cylinder; and a flushing mechanism, a flushing portion of the flushing mechanism being disposed toward at least one of the plurality of different positions. The utility model can solve the problem that the materials are not easy to stir uniformly in centralized feeding.
Description
Technical Field
The utility model relates to the technical field of mixing stations, in particular to a feeding device and a mixing station.
Background
The problem of shaft holding of a stirring machine of a concrete mixing plant is always a pain point in the concrete production industry, the production efficiency of the stirring machine is influenced, heavy cleaning work is brought to machine maintenance personnel, time and labor are wasted, and potential safety hazards exist in the stirring process. The material of stirring host computer commonly used on the market is put in concentratedly at present, and the material is concentrated and is put in a position and form local pile-up to meet easy caking behind the water, difficult stirring, still produce the armful phenomenon of axle easily.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiments of the present invention provide a feeding device and a mixing plant, which can solve the problem that the materials are not easy to be mixed uniformly in a centralized feeding process.
According to an aspect of the present invention, there is provided a feeding device, including: the feeding assembly is installed at the top of the stirring main machine and comprises a plurality of feed openings, each feed opening in the plurality of feed openings is communicated with the stirring cylinder of the stirring main machine, and the plurality of feed openings are respectively arranged towards a plurality of different positions in the stirring cylinder; and a flushing mechanism, a flushing portion of the flushing mechanism being disposed toward at least one of the plurality of different positions.
In one embodiment, the feed assembly comprises: the feeding hopper is arranged at the top of the stirring main machine; and the guide mechanism is installed in the feed hopper, the guide mechanism with form a plurality of unloading passageways between the lateral wall of the play material section of feed hopper, the first end of each unloading passageway in a plurality of unloading passageways all with the feed section intercommunication of feed hopper, just a plurality of unloading passageways correspond and set up a plurality of feed openings, every feed opening in a plurality of feed openings all is located the second end of the unloading passageway that corresponds.
In one embodiment, the material guiding mechanism includes: the first ends of the first guide plates in the plurality of first guide plates respectively form a plurality of discharging channels with the side wall of the discharging section of the feeding hopper.
In an embodiment, the second end of at least one of the plurality of first guide plates is hinged by a hinge structure and is rotatable about a hinge point between side walls of the discharge section of the feed hopper.
In one embodiment, the cross-sectional area of the discharge section of the feed hopper increases from an end of the feed section closer to the feed hopper to an end of the feed section further from the feed hopper; the plurality of blanking channels are all located above a stirring shaft of the stirring host machine, and the plurality of blanking channels are distributed on two sides of the stirring shaft.
In an embodiment, the material guiding mechanism further includes a middle discharging pipe, the middle discharging pipe is located between the plurality of discharging channels, one end of the middle discharging pipe is communicated with the feeding section of the feeding hopper, the other end of the middle discharging pipe is communicated with the stirring cylinder, and the discharging opening at the other end of the middle discharging pipe and the plurality of discharging openings are respectively arranged towards different positions in the stirring cylinder.
In one embodiment, the material guiding mechanism further includes: install in the feeder hopper and be located a plurality of second baffle of a plurality of unloading passageway tops, form guide channel between a plurality of second baffles, guide channel's first end with the feeding section intercommunication of feeder hopper, guide channel's second end respectively with the first end intercommunication of each unloading passageway in a plurality of unloading passageways, guide channel's sectional area by guide channel's first end to guide channel's second end reduces gradually.
In an embodiment, a first end of each of the plurality of second guide plates is connected to a side wall of the feeding hopper, and a second end of each of the plurality of second guide plates is spaced from the side wall of the feeding hopper; each first baffle in a plurality of first baffles all with the lateral wall interval of feeder hopper sets up, just the first end of every first baffle in a plurality of first baffles with the interval between the lateral wall of feeder hopper all is greater than the second end of this first baffle with the interval between the lateral wall of feeder hopper.
In one embodiment, the feed assembly comprises: the feeding hoppers are installed at the top of the stirring host respectively, the feeding hoppers are correspondingly arranged at the plurality of feed openings, and each feed opening in the plurality of feed openings is located at the bottom of the corresponding feeding hopper.
In an embodiment, the flushing mechanism comprises a plurality of flushing portions located on both sides of the feeding assembly, each of the plurality of flushing portions being arranged towards any one of the plurality of different positions and the inner wall of the mixing bowl.
According to another aspect of the present invention, an embodiment of the present invention provides a mixing station, comprising: a stirring main machine; the feeding device according to any one of the above embodiments, wherein the feeding device is installed at the top of the stirring main machine.
According to the feeding device, the stirring main machine and the stirring station provided by the embodiment of the utility model, the feeding points of the materials are increased in a multi-point feeding mode, the materials are uniformly dispersed and fed, the condition that the materials are accumulated at local positions is reduced, the efficiency of mixing the materials with other materials is improved, the falling positions of the materials are washed by arranging the washing mechanism, the possibility that the materials fall into the stirring main machine and are directly agglomerated and solidified when meeting water is reduced, the possibility that the stirring blades are agglomerated is reduced, and the risk of shaft holding is reduced.
Drawings
Fig. 1 is a schematic structural diagram illustrating a feeding device applied to a stirring main machine according to an exemplary embodiment of the present disclosure.
Fig. 2 is a schematic structural diagram of a feeding device provided in an exemplary embodiment of the present application.
Fig. 3 is a schematic structural diagram of a feeding device according to another exemplary embodiment of the present application.
Fig. 4 is a schematic structural diagram of a feeding device according to another exemplary embodiment of the present application.
Description of the reference numerals: 1. a feed assembly; 11. a feed hopper; 12. a material guiding mechanism; 121. a first guide plate; 122. a second guide plate; 123. an intermediate blanking pipe; 13. a blanking channel; 2. a flushing mechanism; 21. a washing section; 3. a stirring main machine; 4. a hinge structure.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Further, in the exemplary embodiments, since the same reference numerals denote the same components having the same structure or the same steps of the same method, if an embodiment is exemplarily described, only a structure or a method different from the already described embodiment is described in other exemplary embodiments.
Throughout the specification and claims, when one element is described as being "connected" to another element, the one element may be "directly connected" to the other element or "electrically connected" to the other element through a third element. Furthermore, unless explicitly described to the contrary, the term "comprising" and its corresponding terms should only be taken as including the stated features, but should not be taken as excluding any other features.
Fig. 1 is a schematic structural diagram of a feeding device applied to a stirring main machine according to an exemplary embodiment of the present application, and as shown in fig. 1, the feeding device includes: the feeding assembly 1 is installed at the top of the stirring main machine 3, the feeding assembly 1 comprises a plurality of feed openings, each feed opening in the plurality of feed openings is communicated with the stirring cylinder of the stirring main machine 3, and the plurality of feed openings are respectively arranged towards a plurality of different positions in the stirring cylinder; and a flushing mechanism 2, a flushing part of the flushing mechanism 2 being provided toward at least one of a plurality of different positions.
The material that feed arrangement carried is powdery or granular material usually, for example material, aggregate etc. have when dry scatter float in the characteristics in the air easily, when moist easy caking adhere on other objects characteristics, consequently, need overcome the unique characteristic of powdery material or granular material to the transport of material to improve stirring efficiency and keep stirring quality. Install feeding subassembly 1 on stirring host computer 3 for the guide material falls into the position of difference in the agitator, thereby it is direct to fall into the agitator perpendicularly in a large number from 3 tops of stirring host computer to reduce the material, thereby meets the possibility that water direct caking solidifies, also can adjust falling into speed and the area that falls into of material through the shape structure of adjustment feeding subassembly 1, thereby reduces the risk that produces the axle phenomenon. Set up and wash mechanism 2 and be arranged in washing the position that the material fell into the agitator to reduce the phenomenon of the direct caking of material contact water in the agitator and take place, wash mechanism 2 and can be connected with the host computer water intake pipe, and set up solitary valve, open solitary valve when the material feeding, for stirring 3 supplementary water yields of host computer on the one hand, on the other hand can utilize the impulsive force of water directly to wash the material and fall into the position.
According to the feeding device provided by the utility model, the feeding points of materials are increased in a multi-point feeding manner, the materials are fed in a uniformly dispersed manner, the condition that the materials are accumulated at a local position is reduced, the efficiency of mixing the materials with other materials is improved, the falling position of the materials is washed by arranging the washing mechanism 2, the possibility that the materials fall into the stirring main machine 3 and are directly agglomerated and solidified when meeting water is reduced, the possibility that stirring blades are agglomerated is reduced, and the risk of generating shaft holding is reduced.
Fig. 2 is a schematic structural diagram of a feeding device provided in an exemplary embodiment of the present application, and as shown in fig. 2, a feeding assembly 1 includes: the feed hopper 11 is arranged at the top of the stirring main machine 3; and guide mechanism 12, guide mechanism 12 installs in feeder hopper 11, forms a plurality of unloading passageways 13 between the lateral wall of the ejection of compact section of guide mechanism 12 and feeder hopper 11, and the first end of each unloading passageway 13 in a plurality of unloading passageways 13 all communicates with the feed section of feeder hopper 11, and a plurality of unloading passageways 13 correspond and set up a plurality of feed openings, and every feed opening in a plurality of feed openings all is located the second end of the unloading passageway 13 that corresponds.
The material guide mechanism 12 is used for guiding the material entering the feed hopper 11 into a plurality of discharging channels 13 respectively so as to disperse the discharging, and each discharging channel 13 is provided with a discharging opening. The blanking channel 13 can increase the distance between the blanking positions of the materials in the two channels, so that multipoint blanking is formed, and local accumulation is avoided. And the blanking channel 13 can also reduce the possibility that the materials splash to the inner wall of the mixing tank when falling, the material weight is lighter, and if the materials are not transported in the blanking channel 13 in the falling process, the materials can be pushed by the materials entering after transportation to float in the air and adhere to the inner wall of the mixing tank.
The material guiding mechanism 12 may include: a plurality of first guide plates 121 are installed in the feeding hopper 11, and a plurality of discharging channels 13 are formed between the first ends of the first guide plates 121 of the plurality of first guide plates 121 and the side walls of the discharging section of the feeding hopper 11.
The material falls into the mixing bowl through a plurality of unloading passageways 13, can reduce the speed that the material falls into the mixing bowl, and the efficiency that the stirring can be promoted to the stable even speed of throwing material of maintenance. First guide plate 121 can play the effect that slows down material falling speed, forms the passageway between the lateral wall of first guide plate 121 and feeder hopper 11, further controls the volume that the material falls into the agitator tank. And unloading passageway 13 orientation is different, can divide into the material that drops into feeder hopper 11 the stranded, falls into the region far away in the churn respectively to avoid local accumulational condition to take place.
In an embodiment, as shown in fig. 2, the second end of at least one first guide plate 121 of the plurality of first guide plates 121 is hinged by a hinge structure 4 and is rotatable about a hinge point between the side walls of the discharge section of the feeding hopper 11.
The second end of each first guide plate 121 may be hinged by the same hinge structure 4, and the hinge structure 4 is mounted between the second ends of each first guide plate 121. In addition, the second end of each first guide plate 121 may also be connected to the sidewall of the feeding hopper 11 by a hinge structure 4. When an intermediate blanking pipe is present, the second end of each first guide plate 121 may also be hinged to the intermediate blanking pipe by means of a hinge structure 4. The angle of the first guide plate 121 can be adjusted by the hinge structure 4, thereby adjusting the blanking amount of the blanking passage 13. First baffle 121 can use the pin joint to rotate as the center, and when first baffle 121 kept away from the lateral wall of feeder hopper 11, unloading passageway 13 enlarges, and throughput increases, and when first baffle 121 rotated and is close to the lateral wall of feeder hopper 11, unloading passageway 13 dwindled, then throughput reduces, through the rotation angle of adjusting first baffle 121, controls throughput.
In one embodiment, as shown in FIG. 2, the cross-sectional area of the discharge section of the hopper 11 increases from the end of the feed section closer to the hopper 11 to the end of the feed section further from the hopper 11; a plurality of unloading passageways 13 all are located the top of the (mixing) shaft of stirring host computer 3, and a plurality of unloading passageways 13 distribute in the both sides of (mixing) shaft.
The sectional area of the discharging section of the feeding hopper 11 can be adjusted according to actual requirements, the sectional area of the discharging section of the feeding hopper 11 is controlled by adjusting the rotation angle of the first guide plate 121, the sectional area of the discharging section of the feeding hopper 11 can be gradually increased from one end of the feeding section close to the feeding hopper 11 to one end of the feeding section far away from the feeding hopper 11, or the sectional area of the discharging section of the feeding hopper 11 can be gradually decreased from one end of the feeding section close to the feeding hopper 11 to one end of the feeding section far away from the feeding hopper 11, or the sectional area of the discharging section of the feeding hopper 11 can be unchanged from one end of the feeding section close to the feeding hopper 11 to one end of the feeding section far away from the feeding hopper 11, and the blanking speed is adjusted by adjusting the sectional areas of different positions of the discharging section of the feeding hopper 11. A plurality of unloading passageways 13 can evenly distributed in the both sides of (mixing) shaft, also can distribute in the both sides of (mixing) shaft according to the demand wantonly.
Fig. 3 is a schematic structural diagram of a feeding device according to another exemplary embodiment of the present disclosure, and as shown in fig. 3, the material guiding mechanism 12 further includes an intermediate discharging pipe 123, the intermediate discharging pipe 123 is located between the plurality of discharging channels 13, one end of the intermediate discharging pipe 123 is communicated with the feeding section of the feeding hopper 11, the other end is communicated with the mixing cylinder, and a discharging opening and the plurality of discharging openings at the other end of the intermediate discharging pipe 123 are respectively disposed toward different positions in the mixing cylinder.
The feed opening of middle unloading pipe 123 is just to the agitator tank, increases the blanking position of material, and the material is thrown in the homodisperse material that carries on, reduces the condition that the material piles up in local position and produces. The middle blanking pipe 123 directly guides the material to vertically fall, so that the transportation pressure of the first guide plate 121 is reduced. The second end of each first guide plate 121 may also be hinged to the intermediate blanking pipe 123 by means of a hinge structure 4.
In an embodiment, as shown in fig. 2, the material guiding mechanism 12 may further include: the second guide plates 122 are mounted in the feed hopper 11 and located above the plurality of blanking channels 13, guide channels are formed among the second guide plates 122, first ends of the guide channels are communicated with the feed section of the feed hopper 11, second ends of the guide channels are respectively communicated with first ends of the blanking channels 13 in the plurality of blanking channels 13, and cross-sectional areas of the guide channels are gradually reduced from the first ends of the guide channels to the second ends of the guide channels.
The angle between the second guide plate 122 and the side wall of the feeding hopper 11 is acute. The second baffle 122 that the slope set up can reduce the speed that the material fell into stirring host computer 3, made the material become the slope landing from the vertical fall in stirring host computer 3, the mode input material through the slope landing can avoid the local accumulational condition of material to the input speed that can adjust the material is in order to maintain even stirring speed, guarantees the stirring. Guide channel and unloading passageway 13 cooperation are slowed down material falling speed by guide channel, and unloading passageway 13 dispersion material falls into the point position of agitator, and the guide material multiple spot blanking reduces the risk of caking.
In an embodiment, as shown in fig. 2, a first end of each second guide plate 122 of the plurality of second guide plates 122 is connected to a side wall of the feeding hopper 11, and a second end of each second guide plate 122 of the plurality of second guide plates 122 is spaced apart from the side wall of the feeding hopper 11; each first guide plate 121 of the plurality of first guide plates 121 is spaced apart from the sidewall of the feeding hopper 11, and an interval between a first end of each first guide plate 121 of the plurality of first guide plates 121 and the sidewall of the feeding hopper 11 is greater than an interval between a second end of the first guide plate 121 and the sidewall of the feeding hopper 11.
For the same first guide plate 121, the interval between one end and the side wall is larger than the interval between the other end and the side wall, that is, the first guide plate 121 is arranged obliquely, and the first guide plate 121 and the side wall are not arranged in parallel. The second guide plate 122 is also inclined to the side wall of the feeding hopper 11 to slow down and guide the material feeding.
Fig. 4 is a schematic structural diagram of a feeding device according to another exemplary embodiment of the present application, and as shown in fig. 4, a feeding assembly 1 includes: a plurality of feeder hoppers 11, a plurality of feeder hoppers 11 are installed respectively at the top of stirring host computer 3, and a plurality of feed hoppers 11 correspond and are equipped with a plurality of feed openings, and every feed opening in a plurality of feed openings all is located the bottom of the corresponding feeder hopper 11.
The plurality of feed hoppers 11 can be directly arranged at the top of the stirring host machine 3, for example, three feed hoppers 11 are arranged, the bottom of each three feed hopper 11 is provided with a feed opening, the feed openings at the bottoms of the three feed hoppers 11 are respectively aligned to the left side, the middle side and the right side of the stirring cylinder, the possibility of local accumulation of materials in the stirring cylinder is reduced, the stirring speed is improved while the blanking efficiency is improved, and the risk of shaft locking is reduced.
In an embodiment, the flushing mechanism 2 comprises a plurality of flushing sections 21 located at both sides of the feeding assembly 1, each flushing section 21 of the plurality of flushing sections 21 being arranged towards any one of a plurality of different positions and the inner wall of the mixing bowl.
In one embodiment, the feeding assembly 1 and the washing mechanism 2 are both mounted on the cover of the stirring main body 3, and each washing part 21 of the plurality of washing parts 21 is disposed toward any one of a plurality of different positions and the inner wall of the cover.
The washing part 21 can adjust the washing position, further improve stirring efficiency and reduce the occurrence of the shaft holding condition. The washing unit 21 washes the substrate at a plurality of positions to reduce the local accumulation of the particles.
In one embodiment, the stirring main machine is connected with a main machine water inlet pipeline; the main machine water inlet pipeline is used for conveying stirring water of the stirring main machine; the feeding device according to any one of the above embodiments is installed at the top of the stirring main machine; wherein, feed arrangement includes the water washing pipeline, and the water washing pipeline is connected with washing mechanism, and the water washing pipeline is connected with the host computer water inlet pipe, and the water washing pipeline is the branch of host computer water inlet pipe, and the water washing pipeline structure is for carrying the washing water that washes the mechanism.
The flushing mechanism can be connected with a water inlet pipeline of the main machine, an independent valve is arranged, the independent valve is opened when materials are fed, on one hand, the water quantity is supplemented for the stirring main machine, and on the other hand, the materials can be directly flushed by the impulsive force of water and fall into the position. The quality and the efficiency of stirring are improved under the condition of not influencing the stirring water.
According to another aspect of the present invention, an embodiment of the present invention provides a mixing station, including: a stirring main machine; the feeding device according to any one of the above embodiments, wherein the feeding device is installed on the top of the stirring main machine.
This stirring host computer at stirring station increases the material through the mode that the material was thrown to the multiple spot and throws the material, and the material is thrown to the material of carrying on of homodisperse, reduces the material and produces in the accumulational condition in local position, improves the efficiency that material and other materials mix, washes the mechanism through the setting, directly washes the blanking position, thereby reduces the material and falls into the stirring host computer and meet the possibility that water direct caking solidifies, reduces the possibility of stirring vane caking to the reduction produces the risk of embracing the axle.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and the like that are within the spirit and principle of the present invention are included in the present invention.
Claims (11)
1. A feeding device, comprising:
the feeding assembly is installed at the top of the stirring main machine and comprises a plurality of feed openings, each feed opening in the plurality of feed openings is communicated with the stirring cylinder of the stirring main machine, and the plurality of feed openings are respectively arranged towards a plurality of different positions in the stirring cylinder; and
a flushing mechanism having a flushing portion disposed toward at least one of the plurality of different positions.
2. The feeding device of claim 1, wherein the feeding assembly comprises:
the feeding hopper is arranged at the top of the stirring main machine; and
guide mechanism, guide mechanism installs in the feeder hopper, guide mechanism with form a plurality of unloading passageways between the lateral wall of the play feed section of feeder hopper, the first end of each unloading passageway in a plurality of unloading passageways all with the feed section intercommunication of feeder hopper, just a plurality of unloading passageways correspond and set up a plurality of feed openings, every feed opening in a plurality of feed openings all is located the second end of the unloading passageway that corresponds.
3. The feeding device as claimed in claim 2, wherein the material guiding mechanism comprises:
the first ends of the first guide plates in the plurality of first guide plates respectively form a plurality of discharging channels with the side wall of the discharging section of the feeding hopper.
4. The feeding device as recited in claim 3, wherein the second end of at least one of the plurality of first guide plates is hinged by a hinge structure and is rotatable about a hinge point between sidewalls of the discharge section of the feed hopper.
5. The feeding device according to claim 2, wherein the cross-sectional area of the discharge section of the feeding hopper increases from an end of the feed section close to the feeding hopper to an end of the feed section remote from the feeding hopper;
the plurality of blanking channels are all located above a stirring shaft of the stirring host machine, and the plurality of blanking channels are distributed on two sides of the stirring shaft.
6. The feeding device as claimed in claim 2, wherein the material guiding mechanism further comprises an intermediate discharging pipe, the intermediate discharging pipe is located between the plurality of discharging channels, one end of the intermediate discharging pipe is communicated with the feeding section of the feeding hopper, the other end of the intermediate discharging pipe is communicated with the stirring cylinder, and a discharging opening at the other end of the intermediate discharging pipe and the plurality of discharging openings are respectively arranged towards different positions in the stirring cylinder.
7. The feeding device as claimed in claim 3, wherein the material guiding mechanism further comprises:
install in the feeder hopper and be located a plurality of second baffle of a plurality of unloading passageway tops, form guide channel between a plurality of second baffles, guide channel's first end with the feed section intercommunication of feeder hopper, guide channel's second end respectively with the first end intercommunication of each unloading passageway in a plurality of unloading passageways, guide channel's sectional area by guide channel's first end to guide channel's second end reduces gradually.
8. The feeding device as claimed in claim 7, wherein a first end of each of the plurality of second guide plates is connected to a side wall of the feeding hopper, and a second end of each of the plurality of second guide plates is spaced apart from the side wall of the feeding hopper;
each first baffle in a plurality of first baffles all with the lateral wall interval of feeder hopper sets up, just the first end of every first baffle in a plurality of first baffles with the interval between the lateral wall of feeder hopper all is greater than the second end of this first baffle with the interval between the lateral wall of feeder hopper.
9. The feeding apparatus according to claim 1, wherein the feeding assembly comprises:
the feeding hoppers are installed at the top of the stirring host respectively, the feeding hoppers are correspondingly arranged at the plurality of feed openings, and each feed opening in the plurality of feed openings is located at the bottom of the corresponding feeding hopper.
10. The feeding device according to claim 1, wherein the flushing mechanism comprises a plurality of flushing portions located on either side of the feeding assembly, each of the plurality of flushing portions being disposed towards any one of the plurality of different positions and the inner wall of the mixing bowl.
11. A mixing station, characterized in that it comprises:
a stirring main machine;
the feeding device according to any one of claims 1-10, wherein the feeding device is installed on the top of the stirring main machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220351244.4U CN216941293U (en) | 2022-02-21 | 2022-02-21 | Feeding device and mixing plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220351244.4U CN216941293U (en) | 2022-02-21 | 2022-02-21 | Feeding device and mixing plant |
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| Publication Number | Publication Date |
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| CN216941293U true CN216941293U (en) | 2022-07-12 |
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| CN202220351244.4U Active CN216941293U (en) | 2022-02-21 | 2022-02-21 | Feeding device and mixing plant |
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