CN215141818U - Grading scraper conveyor - Google Patents
Grading scraper conveyor Download PDFInfo
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- CN215141818U CN215141818U CN202121188153.5U CN202121188153U CN215141818U CN 215141818 U CN215141818 U CN 215141818U CN 202121188153 U CN202121188153 U CN 202121188153U CN 215141818 U CN215141818 U CN 215141818U
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Abstract
The utility model discloses a hierarchical scraper conveyor, including individual layer scraper conveyor, include: the device comprises a tank extending along a first direction, a scraper head mechanism and a scraper tail mechanism which are respectively arranged at two ends of the tank, a first transmission mechanism for connecting the tank, the scraper head mechanism and the scraper tail mechanism, and a first driving device connected with the first transmission mechanism; the upper end of the tank has an open end, and the open end extends along a first direction, further comprising: screening mechanism disposes in the upper end of groove case, includes: rolling shafts extending along the second direction and arranged at intervals in the direction from the scraper tail mechanism to the scraper head mechanism, wherein the rolling shafts form a material conveying surface, a feeding end is formed at one end close to the scraper tail mechanism, a discharging end is formed at one end close to the scraper head mechanism, and a filtering gap is formed between every two adjacent rolling shafts; and the second driving device is connected with the rolling shaft and used for driving the rolling shaft to rotate and conveying the materials from the feeding end to the discharging end.
Description
Technical Field
The utility model relates to a mining machinery equipment field especially relates to a hierarchical scraper conveyor for coal.
Background
Raw coal preparation is an important link in a coal production system, and all size fractions of coal obtained by grading and removing impurities from raw coal are generally fed into a subsequent operation link. The existing raw coal preparation operation generally feeds materials into a screening device for grading, oversize lump coal is subjected to impurity removal through a hand-selection belt and then enters a subsequent crushing or lump coal washing link, and undersize materials are collected and then fed into slack coal washing or other subsequent links. In large coal mine production, lump coal and slack coal are most commonly subjected to washing and subsequent links of transportation and distribution by using a scraper conveyer. The screening, manual separation, subsequent transportation and blending links of the existing raw coal preparation operation are respectively completed by a grading screen, a manual separation belt, a scraper conveyor, a matched chute and the like, so that the process arrangement is complex, the investment of civil engineering, equipment and installation engineering is large, and the production and operation cost is high.
Disclosure of Invention
The present solution addresses the above-mentioned problems and needs by providing a graded scraper conveyor that achieves the above-mentioned technical objectives and provides other technical effects by adopting the following technical features.
The utility model provides a hierarchical scraper conveyor, including individual layer scraper conveyor, it includes:
the automatic scraper conveying device comprises a tank extending along a first direction, a scraper head mechanism and a scraper tail mechanism which are respectively arranged at two ends of the tank, a first transmission mechanism for connecting the tank, the scraper head mechanism and the scraper tail mechanism, and a first driving device connected with the first transmission mechanism;
the upper end of the tank has an open end, and the open end extends along the first direction, further comprising:
a screening mechanism disposed at an upper end of the tank, comprising:
rolling shafts extending along the second direction and arranged at intervals in the direction from the scraper tail mechanism to the scraper head mechanism, wherein the rolling shafts form a material conveying surface, a feeding end is formed at one end close to the scraper tail mechanism, a discharging end is formed at one end close to the scraper head mechanism, and a filtering gap is formed between every two adjacent rolling shafts;
the second driving device is connected with the rolling shaft and is used for driving the rolling shaft to rotate and conveying the materials from the feeding end to the discharging end;
the first direction and the second direction are perpendicular to each other.
In the technical scheme, when the multi-stage scraper conveyor works, materials are poured from the feeding end, the rolling shafts are driven by the second driving device to roll, so that the materials are transmitted from the feeding end to the discharging end, in the process, the materials with smaller grain size are filtered by the filtering gaps among the rolling shafts, and enter the tank box from the open end along the third direction; meanwhile, the single-layer scraper conveyor is driven by the first driving device to convey the filtered smaller-size materials along the first direction; this multistage scraper conveyor can realize screening, compounding and transportation, improves the operating efficiency greatly, simple structure moreover, simple to operate, and production operation cost is low.
In addition, according to the utility model discloses a hierarchical scraper conveyor can also have following technical characterstic:
in an example of the present invention, the material conveying surface includes:
the inclined section starts from one end close to the scraper tail mechanism, extends towards one end of the scraper head mechanism and gradually reduces in height in a third direction;
a horizontal section arranged in the first direction, one end of which is coupled with the inclined section;
the feeding end is positioned on the inclined section, and the discharging end is positioned on the horizontal section;
wherein the third direction is perpendicular to the first direction and the second direction.
In an example of the present invention, an included angle α between the inclined section and the horizontal section in a plane formed by the third direction and the first direction is an acute included angle.
In one example of the invention, the effective length of the material conveying surface in the first direction is no longer than the length of the open end of the tank in the first direction.
In one example of the present invention, the span of the filter gap between two adjacent rolling axes is equal.
In an example of the present invention, the span of the filter gap between two adjacent rolling shafts is 25mm to 80 mm.
In an example of the present invention, the present invention further includes: the screen box is arranged on the screen box,
the screen box cover is arranged on the material conveying surface and at least seals the inclined section, and one end of the screen box cover close to the scraper tail mechanism forms the feeding end.
In an example of the present invention, the sieve box further comprises:
and the dustproof baffle curtain is arranged at one end of the screen box deviating from the feeding end in the first direction.
In an example of the present invention, the screen box extends to the horizontal section, and the dustproof curtain is disposed at an upper end of the horizontal section.
In one example of the utility model, an electrohydraulic flat gate is arranged on the tank,
the electrohydraulic flat gate can switch between an opening position for opening the tank and a closing position for closing the tank;
the electro-hydraulic flat gate is positioned behind the discharge end.
The following description of the preferred embodiments of the present invention will be made in detail with reference to the accompanying drawings, so that the features and advantages of the invention can be easily understood.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly described below. The drawings are intended to depict only some embodiments of the invention, and not all embodiments of the invention are limited thereto.
Fig. 1 is a schematic structural view of a classifying scraper conveyor according to an embodiment of the present invention.
List of reference numerals:
a multi-stage flight conveyor 1000;
a single-layer flight conveyor 100;
a tank 110;
an open end 111;
a squeegee head mechanism 120;
a squeegee tail mechanism 130;
a first transmission mechanism 140;
an electrohydraulic flat gate 150;
a screening mechanism 200;
a roll axis 210;
the filter gap 211;
a material conveying surface 220;
an inclined section 221;
a horizontal segment 222;
a sieve box 230;
a feeding end 240;
a discharge end 250;
a dust curtain 260;
a base 270.
Detailed Description
In order to make the technical solution of the present invention, its purpose, technical solution and advantages become clearer, the drawings of the embodiments of the present invention will be combined hereinafter, and the technical solution of the embodiments of the present invention will be clearly and completely described. Like reference symbols in the various drawings indicate like elements. It should be noted that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
The utility model provides a hierarchical scraper conveyor, including individual layer scraper conveyor 100, individual layer scraper conveyor 100 includes:
a tank 110 extending in a first direction, a squeegee head mechanism 120 and a squeegee tail mechanism 130 respectively disposed at both ends of the tank 110, a first transmission mechanism 140 coupling the tank 110, the squeegee head mechanism 120 and the squeegee tail mechanism 130, and a first driving device coupled to the first transmission mechanism 140;
specifically, the first transmission mechanism 140 is a scraper chain, the scraper chain sequentially connects the scraper tail mechanism 130, the tank 110 and the scraper head mechanism 120, and the first transmission mechanism 140 is driven by a first driving device (for example, a driving motor, which may be installed in the scraper head mechanism 120) to rotate and drive the operation of the single-layer tube sheet conveyor; the single-tier flight conveyor 100 also includes a tensioning device (e.g., which may be mounted in the flight tail mechanism 130) coupled to the flight chain for adjusting the tightness of the flight chain.
The upper end of the tank 110 has an open end 111, and the open end 111 extends in the first direction, further comprising:
a sieving mechanism 200 disposed at an upper end of the tank 110, including:
rolling shafts 210 extending along the second direction and arranged at intervals in the direction from the scraper tail mechanism 130 to the scraper head mechanism 120, wherein the rolling shafts 210 form a material conveying surface 220, a feeding end 240 is formed at one end close to the scraper tail mechanism 130, a discharging end 250 is formed at one end close to the scraper head mechanism 120, and a filtering gap 211 is formed between every two adjacent rolling shafts 210;
the second driving device is connected with the rolling shaft 210 and used for driving the rolling shaft 210 to rotate and conveying the material from the feeding end 240 to the discharging end 250;
the first direction and the second direction are perpendicular to each other, and it is understood that the second direction is a direction perpendicular to the paper.
When the multistage scraper conveyor 1000 works, materials are poured from the feeding end 240, the rolling shafts 210 are driven to roll by the second driving device, so that the materials are conveyed from the feeding end 240 to the discharging end 250, in the process, the materials with smaller particle size fraction are filtered by the filtering gaps 211 between the rolling shafts 210, and enter the tank 110 from the open end 111 along the third direction; meanwhile, the single-layer scraper conveyor 100 is driven by the first driving device to convey the filtered smaller-sized materials along the first direction; this multistage scraper conveyor 1000 can realize screening, compounding and transportation, improves the operating efficiency greatly, simple structure moreover, simple to operate, and the production operation cost is low.
It is worth noting that in the case of separate discharge, larger particle size material may fall from the discharge end 250 into the tank 110 and be discharged by the flight head mechanism 120, in which case mixing with smaller particle size material may be controlled by the provision of electrohydraulic flat gate 150 as described below. Of course, the discharge end 250 may be extended to a designated output point for direct output.
When mixing materials, the materials can be conveyed to the tank 110 by the second driving device, and the materials with larger particle size and the materials with smaller particle size are both output by the scraper head mechanism 120, so that the mixing function is realized.
In an example of the present invention, the screening mechanism 200 further includes:
a second transmission mechanism coupled to the rolling shaft 210 and coupled to a second driving device;
for example, the second transmission mechanism includes a driving gear fixedly coupled to an output shaft of the second driving device, and driven gears corresponding to the rolling shafts 210 one by one and fixedly coupled to the rolling shafts 210; wherein, the driving gear is engaged with one of the driven gears, and the driven gears on two adjacent rolling shafts 210 are engaged with each other; it is worth to be noted that the number of teeth of the driving gear is smaller than that of the driven gear, so that the purpose of speed reduction is achieved;
for another example, the second transmission mechanism includes: a driving sprocket fixedly coupled to an output shaft of the second driving device, and a driven sprocket corresponding to the rolling shafts 210 one to one and fixedly coupled to the rolling shafts 210; the chain is sequentially wound on the driving sprocket and each driven sprocket;
the two second transmission mechanisms can realize that the second driving mechanism drives the rolling shaft 210 to rotate so as to realize the conveying of the materials.
In an example of the present invention, the material conveying surface 220 includes:
an inclined section 221 starting at an end close to the squeegee tail mechanism 130 and extending toward an end of the squeegee head mechanism 120 and gradually decreasing in height in a third direction;
a horizontal section 222 arranged in the first direction, one end of which is coupled with the inclined section 221;
wherein the feeding end 240 is located on the inclined section 221, and the discharging end 250 is located on the horizontal section 222;
wherein the third direction is perpendicular to the first direction and the second direction;
that is to say, the material conveying surface 220 is composed of an inclined section 221 and a horizontal section 222, the material sequentially passes through the inclined section 221 and the horizontal section 222, wherein when passing through the inclined section 221, the filtering gap 211 between the rolling shafts 210 realizes the high-efficiency grading function on the material, while the filtering gap 211 of the horizontal section 222 realizes the transportation and manual selection functions on the material, and finally falls into the tank box 110 at the lower layer and is output by the scraper head mechanism 120 under the driving of the first driving device, so-called manual selection means that the material is manually subjected to impurity removal (such as wood, iron wire, plastic and the like).
It should be noted that the inclined section 221 and the horizontal section 222 may adopt independent second transmission mechanism and second driving device, respectively, so as to facilitate the coupling.
In an example of the present invention, an included angle α between the inclined section 221 and the horizontal section 222 in a plane formed by the third direction and the first direction is an acute included angle;
preferably, the included angle α between the inclined section 221 and the horizontal section 222 is 10 ° to 15 °, and a large number of experimental studies find that the classification effect of the inclined section 221 is the best and the efficiency is the highest when the included angle α between the inclined section 221 and the horizontal section 222 is 10 ° to 15 °.
Preferably, the outer contour surface of the rolling shaft 210 of the inclined section 221 is a smooth surface, and due to the inclined arrangement of the inclined section 221, the material automatically slides along the inclined section 221 of the material conveying surface 220 under the action of the gravity of the material; the outer contour surface of the rolling shaft 210 of the horizontal segment 222 is provided with anti-slip stripes, such as diamond-shaped stripes, so that the friction force between the materials and the rolling shaft 210 can be increased, and the materials can be effectively conveyed.
In one example of the present invention, the effective length of the material conveying surface 220 in the first direction is no longer than the length of the open end 111 of the tank 110 in the first direction;
in other words, the sum of the projected length of the inclined section 221 in the first direction and the length of the horizontal section 222 is less than or equal to the length of the open end 111 of the tank 110 in the first direction;
this allows material to fall into the vat 110 either during the screening of the inclined section 221 or after removal of the impurities through the horizontal section 222, allowing for cooperation between the screening mechanism 200 and the single-deck scraper conveyor 100.
In an example of the present invention, the filter gap 211 between two adjacent rolling shafts 210 has an equal span; the materials can be quantitatively screened by setting the span of the filtering gap 211 between two adjacent rolling shafts 210 to be equal;
preferably, the filter gap 211 between two adjacent rolling shafts 210 has a span of 25mm to 80 mm.
In an example of the present invention, the present invention further includes: the screen box 230 is provided with a screen box,
the screen box 230 covers the material conveying surface 220 and at least seals the inclined section 221, and one end close to the scraper tail mechanism 130 forms the feeding end 240;
that is to say, sieve case 230 plays sealed effect to slope section 221, because when slope section 221 carries out the material screening, can produce a large amount of dust, can play the effect of restraineing to the diffusion of dust through setting up sieve case 230, avoids it to spread all around, influences the screening environment.
In an example of the present invention, the sieve box 230 further includes:
a dust curtain 260, the dust curtain 260 being disposed at an end of the sieve box 230 facing away from the feeding end 240 in a first direction;
the dust-proof curtain 260 can isolate the dust in the screen box 230 and prevent the dust from diffusing out of the screen box 230.
In one example of the present invention, the screen box 230 extends to the horizontal section 222, and the dustproof curtain 260 is disposed at the upper end of the horizontal section 222;
because the amount of dust generated in the inclined section 221 is larger, and the amount of dust generated in the inclined section 221 closer to the horizontal section 222 is larger, the dust-proof curtain 260 extending from the screen box 230 to the horizontal section 222 is disposed at the upper end of the horizontal section 222, so that a good buffering effect can be achieved, and the dust-proof effect is better.
In an example of the present invention, the screening mechanism 200 further includes: the base 270 is provided with a plurality of grooves,
the base 270 is disposed at an upper end of the tank 110, and the rolling shaft 210 is pivotally coupled to the base 270;
specifically, the base 270 includes an inclined portion and a horizontal portion, and the rolling shafts 210 are provided on both the inclined portion and the horizontal portion, thereby forming the inclined section 221 and the horizontal section 222 of the conveying plane, and the base 270 is fixedly coupled to the upper end of the tank 110 by a fastener; the screening mechanism 200 and the single-layer scraper conveyor 100 can form a whole by arranging the base 270, and the screening mechanism is compact in structure and convenient to assemble and disassemble; of course, the rolling axle 210 may be disposed separately from the single-deck scraper conveyor 100, for example, the rolling axle 210 may be pivotally coupled to a bracket fixed to the upper wall.
In one example of the present invention, an electrohydraulic flat gate 150 is further provided on the tank 110,
the electrohydraulic flat gate 150 is capable of switching movement between an open position to open the tank 110 and a closed position to close the tank 110;
wherein the electro-hydraulic flat gate 150 is located behind the discharge end 250;
that is, the sluice gate 150 opens the sluice box 110 to an open position when the multi-stage flight conveyor 1000 is in a screening state; the rolling shaft 210 is driven to rotate by the second driving device, so that the functions of screening and conveying materials are realized, the materials with larger particle sizes finally fall into the tank 110 through the discharge end 250, and meanwhile, the single-layer scraper conveyor 100 conveys the screened materials along the first direction and outputs the materials from the opening position of the tank 110; the electro-hydraulic flat gate 150 is positioned behind the discharge end 250, so that the materials at the screening mechanism 200 and the single-layer scraper conveyor 100 are prevented from being mixed in the tank 110;
when the multistage scraper conveyor 1000 is in a mixing state, the tank 110 is closed to a closed position by the electrohydraulic flat gate 150; the rolling shaft 210 is driven to rotate by the second driving device, so that the functions of screening and conveying materials are realized, finally, the materials with larger particle sizes fall into the tank 110 through the discharge end 250, and meanwhile, the single-layer scraper conveyor 100 is driven by the first driving device to work and output the materials through the scraper head mechanism 120; meanwhile, the single-layer scraper conveyor 100 conveys the screened materials along a first direction and outputs the materials from the opening position of the tank box 110, so that mixed discharging is realized.
The utility model discloses an in an example, electricity liquid flat gate 150 includes a plurality ofly, and sets up along the first direction interval on the cell box 110, through controlling electricity liquid flat gate 150 and opening quantity, can realize the material independent ejection of compact after the classification, also can mix the ejection of compact according to the proportion.
In an example of the present invention, the present invention further includes: a controller for controlling the operation of the electronic device,
coupled to the first driving device, the electro-hydraulic flat gate 150 and the second driving device, for controlling the single-layer scraper conveyor 100, the trough box 110 and the screening mechanism 200 to perform corresponding actions;
specifically, when the multistage scraper conveyor 1000 is in a screening state, the electrohydraulic flat gate 150 is controlled by the controller to open the trough box 110 to an open position; then the controller controls the second driving device to drive the rolling shaft 210 to rotate, so that the functions of screening and conveying the materials are realized, finally the materials with larger particle sizes fall into the tank 110 through the discharge end 250, and the controller controls the first driving device to drive the single-layer scraper conveyor 100 to output the materials from the scraper head mechanism 120; meanwhile, the single-layer scraper conveyor 100 conveys the screened materials along a first direction and outputs the materials from the opening position of the tank box 110;
when the multistage scraper conveyor 1000 is in a mixing state, the controller controls the electrohydraulic flat gate 150 to close the trough box 110 to a closed position; then the controller controls the second driving device to drive the rolling shaft 210 to rotate, so that the functions of screening and conveying the materials are realized, finally the materials with larger particle sizes fall into the tank 110 through the discharge end 250, and the controller controls the first driving device to drive the single-layer scraper conveyor 100 to output the materials from the scraper head mechanism 120; meanwhile, the single-layer scraper conveyor 100 conveys the screened materials along a first direction and outputs the materials from the opening position of the tank box 110, so that mixed discharging is realized.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
The exemplary embodiment of the graded scraper conveyor proposed by the present invention has been described in detail above with reference to the preferred embodiments, however, it will be understood by those skilled in the art that many variations and modifications can be made to the above specific embodiments without departing from the concept of the present invention, and various combinations of the various technical features and structures proposed by the present invention can be made without departing from the scope of the present invention, which is defined by the appended claims.
Claims (10)
1. A hierarchical flight conveyor, comprising a single-layer flight conveyor (100) comprising:
a tank (110) extending along a first direction, a squeegee head mechanism (120) and a squeegee tail mechanism (130) respectively arranged at both ends of the tank (110), a first transmission mechanism (140) coupling the tank (110), the squeegee head mechanism (120) and the squeegee tail mechanism (130), and a first driving device coupled to the first transmission mechanism (140);
it is characterized in that the preparation method is characterized in that,
the upper end of the tank (110) has an open end (111), and the open end (111) extends along the first direction, further comprising:
a screening mechanism (200) disposed at an upper end of the tank (110), comprising:
the rolling shafts (210) extend along the second direction and are arranged at intervals in the direction from the scraper tail mechanism (130) to the scraper head mechanism (120), a material conveying surface (220) is formed by the rolling shafts (210), a feeding end (240) is formed at one end close to the scraper tail mechanism (130), a discharging end (250) is formed at one end close to the scraper head mechanism (120), and a filtering gap (211) is formed between every two adjacent rolling shafts (210);
the second driving device is connected with the rolling shaft (210) and used for driving the rolling shaft (210) to rotate and conveying the materials from the feeding end (240) to the discharging end (250);
the first direction and the second direction are perpendicular to each other.
2. The graded scraper conveyor of claim 1,
the material conveying surface (220) comprises:
an inclined section (221) starting at an end close to the squeegee tail mechanism (130) and extending towards an end of the squeegee head mechanism (120), and gradually decreasing in height in a third direction;
a horizontal section (222) arranged in the first direction, one end of which is coupled with the inclined section (221);
wherein the feed end (240) is located on the inclined section (221) and the discharge end (250) is located on the horizontal section (222);
wherein the third direction is perpendicular to the first direction and the second direction.
3. The graded scraper conveyor of claim 2,
an included angle alpha between the inclined section (221) and the horizontal section (222) in a plane formed by the third direction and the first direction is an acute included angle.
4. The graded scraper conveyor of claim 1,
the effective length of the material conveying surface (220) in the first direction is no longer than the length of the open end (111) of the tank (110) in the first direction.
5. The graded scraper conveyor of claim 1,
the filter gaps (211) between two adjacent rolling shafts (210) have the same span.
6. The graded scraper conveyor of claim 1,
the span of the filter gap (211) between two adjacent rolling shafts (210) is 25-80 mm.
7. The graded scraper conveyor of claim 2,
further comprising: a screen box (230),
the screen box (230) is covered on the material conveying surface (220) and at least seals the inclined section (221), and one end of the screen box close to the scraper tail mechanism (130) forms the feeding end (240).
8. The graded scraper conveyor of claim 7,
the sieve box (230) further comprises:
a dust curtain (260), the dust curtain (260) being disposed at an end of the sieve box (230) that is away from the feed end (240) in a first direction.
9. The graded scraper conveyor of claim 8,
the screen box (230) extends to the horizontal section (222), and a dust curtain (260) is arranged at the upper end of the horizontal section (222).
10. The graded scraper conveyor of claim 1,
an electrohydraulic flat gate (150) is also arranged on the tank (110),
the electro-hydraulic flat gate (150) being capable of switching movement between an open position opening the tank (110) and a closed position closing the tank (110);
wherein the electro-hydraulic flat gate (150) is located behind the discharge end (250).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121188153.5U CN215141818U (en) | 2021-05-28 | 2021-05-28 | Grading scraper conveyor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121188153.5U CN215141818U (en) | 2021-05-28 | 2021-05-28 | Grading scraper conveyor |
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| Publication Number | Publication Date |
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| CN215141818U true CN215141818U (en) | 2021-12-14 |
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| CN202121188153.5U Active CN215141818U (en) | 2021-05-28 | 2021-05-28 | Grading scraper conveyor |
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| CN (1) | CN215141818U (en) |
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