Separating screen and separating system

Abstract

The utility model discloses a separating screen and separating system, relates to material sorting technical field, separating screen includes screen body, support surface and support frame, wherein the screen body includes first straight screen section, arc connection section and second straight screen section that extend from high to low in proper order, first straight screen section includes a plurality of first straight rod that are spaced apart in parallel, and second straight rod includes a plurality of second straight rods that are spaced apart in parallel. A first included angle is formed between the first straight screen section and the horizontal plane; the second straight screen section comprises a plurality of second straight rods arranged in parallel at intervals, a second included angle is formed between the second straight screen section and the horizontal plane, and the first included angle is larger than the second included angle; the arc-shaped connecting section comprises a plurality of arc-shaped rods which are arranged in parallel at intervals, and the arc-shaped connecting section is used for slowing down the sliding speed of materials sliding down from the first straight screen section; the two ends of the supporting frame are connected with the bottom face of the screen body and the supporting face respectively so as to support the screen body. In this way, the phenomena of coal jamming and mixing of soil dust and coal can be avoided, and therefore the separation efficiency and the separation quality of the coal are prevented from being affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to material sorting technical field, especially in kind sorting screen and sorting system. BACKGROUND

[0002] In the process of coal loading, the traditional coal yard usually uses a chute to directly load coal into a truck, which causes the coal to collide with the bottom of the truck when falling into the carriage, resulting in an increase in the content of slack coal in the coal. This situation greatly damages the brand image. Therefore, some coal yards first separate the slack coal in the coal by using a slide screen before loading the coal into the truck, which can effectively reduce the content of slack coal in the coal. However, this solution will cause the screen holes to be gradually blocked by coal, resulting in a gradual deterioration of the screening effect. In addition, after the coal passes through the slide screen and falls to the ground, it is usually accumulated in the shovel loading area for the shovel truck to operate. When the shovel truck performs the shovel loading operation, it will shovel and load the deposited coal ash, soil ash, and rock-soil on both sides of the shovel loading area together. This situation will cause a large amount of impurities to be mixed in the loaded coal, thereby affecting the quality of the coal.

[0003] Therefore, it is necessary to provide a kind of sorting screen and sorting system to solve or at least alleviate the above technical problems. SUMMARY

[0004] The main purpose of the utility model is to provide a kind of sorting screen and sorting system, which aims to solve the technical problem that the slide screen cannot guarantee the sorting efficiency and sorting quality when sorting coal.

[0005] To achieve the above purpose, the utility model provides a kind of sorting screen, which comprises:

[0006] The screen body comprises a first straight screen section, an arc-shaped connecting section and a second straight screen section extending in turn from high to low, the first straight screen section comprises a plurality of first straight rods arranged in parallel and at intervals, and a first included angle is arranged between the first straight screen section and the horizontal plane;

[0007] The second straight screen section comprises a plurality of second straight rods arranged in parallel and at intervals, a second included angle is arranged between the second straight screen section and the horizontal plane, and the first included angle is greater than the second included angle;

[0008] The arc-shaped connecting section comprises a plurality of arc-shaped rods arranged in parallel and at intervals, and the arc-shaped connecting section is used to slow down the sliding speed of the material falling from the first straight screen section;

[0009] The support surface;

[0010] The support frame is connected to the bottom surface of the screen body and the support surface at both ends respectively to support the screen body.

[0011] In an embodiment, the first angle is defined as a, and the second angle is defined as b.

[0012] The a and the b satisfy: 40°≤a≤60°, 20°≤b≤30°.

[0013] In an embodiment, the first straight rods, the second straight rods and the arc rods are equal in number, and two ends of each of the arc rods correspond to connect one of the first straight rods and one of the second straight rods, respectively.

[0014] In an embodiment, the sorting screen further comprises a plurality of cross supports, which are installed in parallel on a side of the screen body facing the support surface, wherein the first straight screen section and the second straight screen section are each provided with at least one cross support, and the cross support is arranged perpendicularly to the plurality of first straight rods.

[0015] In an embodiment, the bottom end of the second straight screen section is arranged on the support surface, the second straight screen section comprises a retention area at one end close to the support surface, and one end of the second straight rod close to the support surface partially extends into the retention area.

[0016] The sorting screen further comprises a supporting block, which is installed between the retention area and the support surface, and the supporting block comprises a first structure surface and a second structure surface, the first structure surface is arranged in close contact with the bottom of the retention area, the angle between the first structure surface and the horizontal plane is the same as the second angle, and the second structure surface is arranged in close contact with the support surface.

[0017] In an embodiment, the sorting screen further comprises a baffle, which is installed on both sides of the screen body, and the baffle is used to block the falling of the screened material from both sides of the screen body.

[0018] In an embodiment, the sorting screen further comprises a stockpile chute, which is arranged on a side of the screen body on which the support frame is installed, and the stockpile chute comprises an inclined surface arranged at the bottom of the stockpile chute, the inclined surface is arranged below the support surface, and the inclined surface is arranged in parallel to the second straight screen section.

[0019] In an embodiment, the stockpile chute further comprises a side wall, which forms a material receiving space together with the inclined surface, the inclined surface is provided with a first reinforcing layer on a side facing the screen body, and the side wall is provided with a second reinforcing layer on a side facing the material receiving space.

[0020] In an embodiment, the support frame comprises a first support column, a second support column and a reinforcing support, the first support column is installed on the first straight screen section, and the reinforcing support is installed between two adjacent first straight screen sections.

[0021] The second support column is mounted on the second straight screen section,

[0022] And / or, the second support column is mounted on the arc-shaped connecting section.

[0023] The utility model discloses still provide a kind of sorting system, including the sorting screen of any one of above-mentioned embodiment, the sorting system further include material conveying belt, the material conveying belt is set to the first straight screen section away from the second straight screen section one end, and the material conveying belt is higher than the first straight screen section setting.

[0024] According to the technical scheme provided by the utility model, the sorting screen includes a screen body, a support surface and a support frame, wherein the screen body includes a first straight screen section, an arc-shaped connecting section and a second straight screen section extending in order from high to low, the first straight screen section includes a plurality of first straight rods arranged in parallel and at intervals, and a first included angle is provided between the first straight screen section and a horizontal plane; the second straight screen section includes a plurality of second straight rods arranged in parallel and at intervals, a second included angle is provided between the second straight screen section and the horizontal plane, and the first included angle is greater than the second included angle; the arc-shaped connecting section includes a plurality of arc-shaped rods arranged in parallel and at intervals, and the arc-shaped connecting section is used to slow down the sliding speed of the material falling from the first straight screen section; the two ends of the support frame are connected with the bottom surface of the screen body and the support surface respectively to support the screen body. Through this arrangement, during the process of the coal mixed with fine coal sliding from the first straight screen section to the second straight screen section through the arc-shaped connecting section, the fine coal will fall out of the screen body through the gaps between the first straight rods, the gaps between the arc-shaped rods and the gaps between the second straight rods, and finally the coal with better quality is obtained. The screen body as a whole is combined by rod-shaped structures, which can avoid the phenomenon of coal jamming and thus avoid affecting the efficiency of coal sorting. By providing the second straight screen section with a smaller angle, the coal can stay on the surface of the second straight screen section as much as possible. When the shovel truck performs the shovel loading operation, the coal on the surface of the second straight screen section is directly shoveled, so that the coal is prevented from contacting the dust on the support surface, thereby ensuring the quality of the coal during sorting and avoiding damage to the brand image. At the same time, by providing the arc-shaped connecting section as a buffer, the phenomenon of collision and breakage of the coal due to the change of angle when the coal falls from the first straight screen section to the second straight screen section is avoided, which further ensures the quality of the coal during sorting and avoids the generation of a large amount of broken coal and fine coal. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creating any creative labor.

[0026] Figure 1The structure schematic view of one embodiment of the sorting screen provided in the utility model is provided.

[0027] Figure 2 The structure schematic view of one embodiment of the sorting screen provided in the utility model is provided. Figure 1 The structure schematic view of one embodiment of the sorting screen provided in the utility model is provided.

[0028] Figure 3 The structure schematic view of one embodiment of the sorting screen provided in the utility model is provided. Figure 1 The structure schematic view of one embodiment of the sorting screen provided in the utility model is provided.

[0029] BRIEF DESCRIPTION OF DRAWINGS

[0030] 100, sorting screen;

[0031] 1, screen body; 11, first straight screen section; 111, first straight rod; 12, arc-shaped connecting section; 121, arc-shaped rod; 13, second straight screen section; 131, second straight rod; 132, holding area;

[0032] 2, support surface; 21, shovel loading area;

[0033] 3, support frame; 31, first support column; 32, second support column; 33, reinforcing support;

[0034] 4, cross support;

[0035] 5, supporting block; 51, first structure surface; 52, second structure surface;

[0036] 6, baffle;

[0037] 7, stacking chute; 71, inclined surface; 72, side wall;

[0038] 200, conveying belt;

[0039] 300, mixed coal; 310, lump coal; 320, fine coal;

[0040] 400, rock-soil layer.

[0041] The implementation, functional features and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0043] It should be noted that if the embodiments of the utility model have directionality indication (such as up, down, left, right, front, back), the directionality indication is only used to explain the relative position relationship, movement condition and the like between components in a certain specific posture, if the specific posture changes, then the directionality indication also changes accordingly.

[0044] In addition, if the embodiments of the utility model have the description of "first", "second" and the like, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing in the whole text means that the three parallel schemes include A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary technical personnel in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the protection scope required by the utility model.

[0045] In the coal industry, the sorting of coal is an important link before the sale of coal, through the coal sorting process, the lump coal and the slack coal can be separated, so that the quality of the lump coal is higher, and at the same time, the slack coal can be concentratedly treated, so that the overall quality and utilization rate of the coal are improved. The traditional coal yard usually uses a chute to directly inject coal into a truck, which often causes the collision between the coal and the bottom of the carriage to cause the fragmentation, which seriously affects the quality of the coal, with the improvement of the requirement of customers on the quality of the coal, more and more coal yards increase the coal sorting process.

[0046] According to the observation and research of the applicant, it is found that generally, there are two ways for the separation of coal, the first way is that the mixed coal of lump coal and slack coal is transported to a mechanical sieve through a conveying belt, and the lump coal after sieving is manually carried to a coal yard, which can cause a large amount of dust in the field and seriously damage the health of workers. The second way is that the mixed coal is transported to a slide sieve through a conveying belt, the slide sieve has a certain length, and the mixed coal can slide on the slide sieve under the action of gravity, and the separation of the slack coal and the lump coal is realized in the sliding process, and the separated lump coal directly slides to the coal yard under the action of inertia, and waits for a shovel truck, which avoids excessive manual participation, but still has the following defects: 1) when the mixed coal slides on the slide sieve, the slack coal is easy to be stuck in the sieve net, and with the passage of time, more and more slack coal is stuck in the sieve net, which affects the separation efficiency and quality of the mixed coal; 2) after the lump coal after separation falls into the coal yard, the shovel truck can shovel the soil dust, coal dust and the like in the coal yard into the shovel bucket when shoveling the lump coal, and into the truck compartment, which also reduces the quality of the lump coal to some extent.

[0047] In view of this, the utility model provides a kind of separation sieve to solve above-mentioned problems.

[0048] Please refer to Figures 1 to 3 In an embodiment of the utility model, the separation sieve 100 includes sieve body 1, support surface 2 and support frame 3, wherein the sieve body 1 includes first straight sieve section 11, arc-shaped connecting section 12 and second straight sieve section 13 extended in turn from high to low, first straight sieve section 11 includes a plurality of first straight rods 111 arranged in parallel and at intervals, and a first included angle is arranged between first straight sieve section 11 and horizontal plane;Second straight sieve section 13 includes a plurality of second straight rods 131 arranged in parallel and at intervals, and a second included angle is arranged between second straight sieve section 13 and horizontal plane, and the first included angle is greater than the second included angle;Arc-shaped connecting section 12 includes a plurality of arc-shaped rods 121 arranged in parallel and at intervals, and arc-shaped connecting section 12 is used to slow down the sliding speed of the material sliding from first straight sieve section 11;The two ends of support frame 3 are connected with the bottom surface of sieve body 1 and support surface 2 respectively to support sieve body 1.

[0049] Specifically, the bottom of the second straight screen section 13 is connected with the support surface 2, which usually includes one of the ground and a concrete platform. After the mixed coal 300 passes through the first straight screen section 11 and the arc-shaped connecting section 12, the slack coal 320 can be separated from the gaps between the lump coals 310. Since the second straight screen section 13 has a small inclination angle, the lump coals 310 can be slowed down when passing through the second straight screen section 13 and then stay at the end or the loading area 21 of the second straight screen section 13. In addition, the gaps between the first straight bars 111, the gaps between the arc-shaped bars 121 and the gaps between the second straight bars 131 are designed to only allow the slack coal 320 to pass through. The top surfaces of the first straight bars 111, the arc-shaped bars 121 and the second straight bars 131 form the screening surface of the screen body 1. During the sliding process of the mixed coal 300 on the screening surface, the slack coal 320 falls out of the screening surface through the gaps between the bars, so as to achieve the purpose of sorting the coal. By using the bar structure to form the screening surface, compared with the screening surface formed by the screen mesh, the blockage of the screen mesh by the slack coal 320 can be avoided. In addition, the support frame 3 can support the screen body 1 on the support surface 2 in an inclined manner, so as to provide sufficient stacking height for the slack coal 320 and facilitate the mechanical or manual cleaning of the slack coal 320 under the screen body 1.

[0050] According to the present embodiment, during the loading operation, the bucket of the loader directly takes the material from the upper half of the second straight screen section 13. Since the lump coals 310 continuously slide to the second straight screen section 13, the loader can continuously take the material from the second straight screen section 13. During the process of taking the lump coals 310 by the bucket, the bucket takes the lump coals 310 along the slope of the second straight screen section 13 to the first straight screen section 11. During this process, part of the lump coals 310 will be pushed to the surface of the first straight screen section 11 again, so as to re-screen this part of the lump coals 310 and further remove the slack coal 320 in the gaps of the lump coals 310. In addition, if the slack coal 320 contained in the gaps of the lump coals 310 taken by the bucket is relatively large, the driver of the loader can directly pour all the lump coals 310 in the bucket into the first straight screen section 11 for re-screening, so as to ensure the quality of the coal during the final loading.

[0051] In addition, in the present embodiment, the center axes of the plurality of arc-shaped bars 121 are connected to form an arc-shaped surface, which is concave towards the support surface 2. Please refer to Figure 1The arc-shaped surface is arranged on the top surface of the arc-shaped connecting section 12 in contact with the mixed coal 300, and the arc-shaped surface is arranged inwardly concave to the supporting surface 2. This arrangement can slow down the sliding speed of the mixed coal 300 to a certain extent when the arc-shaped connecting section 12 receives the mixed coal 300 falling from the first straight sieve section 11, so as to avoid the situation that the mixed coal 300 has too high speed when sliding to the second straight sieve section 13, thereby avoiding the situation that the coal is broken due to the strong collision between the coal caused by too high speed. Meanwhile, the arc-shaped connecting section 12 serves as a buffer part connecting the first straight sieve section 11 and the second straight sieve section 13, and can play a certain buffering transition role for the mixed coal 300. If the arc-shaped connecting section 12 is not arranged, since the angle between the first straight sieve section 11 and the second straight sieve section 13 is too large, the mixed coal 300 falling from the first straight sieve section 11 is easy to directly fall to the surface of the second straight sieve section 13, thereby causing the situation of coal breaking. The arc-shaped connecting section 12 arranged between the first straight sieve section 11 and the second straight sieve section 13 can effectively avoid this situation, so as to further improve the screening quality of the mixed coal 300 and reduce the waste of the coal raw material.

[0052] The technical scheme of the embodiment can avoid the phenomenon of coal jamming, thereby avoiding affecting the efficiency of coal sorting. The second straight sieve section 13 with a small angle is arranged, so that the lump coal 310 can stay on the surface of the second straight sieve section 13 as much as possible. When the shovel truck performs the shovel loading operation, the coal on the surface of the second straight sieve section 13 is directly shoveled, so that the coal is prevented from contacting the dust on the supporting surface 2, thereby ensuring the quality of coal sorting and avoiding damaging the brand image. Meanwhile, the arc-shaped connecting section 12 is arranged as a buffer, so as to prevent the coal falling from the first straight sieve section 11 from colliding and breaking due to the change of angle when falling into the second straight sieve section 13, thereby further ensuring the quality of coal sorting and preventing a large amount of broken coal and fine coal 320 from being generated.

[0053] Further, in the embodiment of the utility model, define: first included angle is alpha, second included angle is beta, then alpha and beta satisfy: 40 DEG ≤ alpha ≤ 60 DEG, 20 DEG ≤ beta ≤ 30 DEG. Preferably, in the embodiment, the degree of first included angle is set to 45 DEG, the degree of second included angle is set to 20 DEG, so set, mixed coal 300 is faster when passing through first straight sieve section 11, cooperate the gap between first straight rod 111, make mixed coal 300 slide through first straight sieve section 11 quickly, thereby can improve the separation efficiency of coal. In order to improve the separation quality, set up arc connecting section 12 and second straight sieve section 13, the sliding speed of mixed coal 300 on arc connecting section 12 and second straight sieve section 13 will gradually reduce, thereby have sufficient time to make slack coal 320 be screened out. After slack coal 320 is screened out, the movement speed of lump coal 310 in second straight sieve section 13 will gradually reduce and gradually stop movement due to the effect of friction, in this process, slack coal 320 not screened in the gap of lump coal 310 will fall through the gap between second straight rod 131, thereby further guarantee the quality of lump coal 310. When lump coal 310 slides to the end of second straight sieve section 13 close to support surface 2, if there is no barrier in shovel loading area 21, lump coal 310 will move a part of distance in shovel loading area 21 under the action of inertia, the surface of shovel loading area 21 is hardened by cement or steel plate, and lump coal 310 sliding into shovel loading area 21 will not stir up dust. When lump coal 310 is accumulated in shovel loading area 21 and second straight sieve section 13 to a certain amount, the shovel will shovel the accumulated lump coal 310 to the coal yard or directly load the car.

[0054] In the embodiment of the utility model, the number of first straight rod 111, second straight rod 131 and arc rod 121 is same, and the two ends of one arc rod 121 are connected with one first straight rod 111 and one second straight rod 131 respectively. That is, first straight rod 111, second straight rod 131 and arc rod 121 are integrally formed rod, this setting can reduce the difficulty of assembling sieve body 1, improve the assembling efficiency, at the same time, this setting does not need to produce weld joint or thread connection structure at the two ends of arc rod 121, can improve the overall strength of sieve body 1.

[0055] In the embodiment of the utility model, separation sieve 100 further includes a plurality of cross braces 4, which are installed in parallel on the side of sieve body 1 facing support surface 2, wherein first straight sieve section 11 and second straight sieve section 13 each have at least one cross brace 4, and the cross brace 4 is perpendicular to the plurality of first straight rods 111. Figure 1 With Figure 2The cross support 4 is used for supporting the bottom surface of the screen body 1, and in the embodiment, the cross support 4 comprises one of a U-shaped steel, a channel steel, an L-shaped steel and a flat steel. The cross support 4 has high bending strength and can provide normal support to the screen body 1, thereby avoiding deformation of the screen body 1 due to impact of the coal. The arrangement can also improve the integrity of the sorting screen 100 and avoid excessive shaking of the screen body 1 during use.

[0056] Please refer to Figures 1 to 3 In the embodiment, the bottom end of the second straight screen section 13 is arranged on the supporting surface 2, the second straight screen section 13 comprises a holding area 132 close to one end of the supporting surface 2, and the second straight rod 131 is partially inserted into the holding area 132 close to one end of the supporting surface 2. The sorting screen 100 further comprises a supporting block 5 arranged between the holding area 132 and the supporting surface 2, the supporting block 5 comprises a first structure surface 51 and a second structure surface 52, the first structure surface 51 is arranged in close contact with the bottom of the holding area 132, the included angle between the first structure surface 51 and the horizontal plane is the same as the second included angle, and the second structure surface 52 is arranged in close contact with the supporting surface 2. In the embodiment, the holding area 132 is used for supporting the lump coal 310 after sorting, and a triangular area is formed between the holding area 132 and the supporting surface 2. The triangular area is filled with a material to form the supporting block 5, and the material of the supporting block 5 comprises one of cement, concrete and cement mortar. Through the arrangement, when the gap between the lump coal 310 has residual fine coal 320, the fine coal 320 will not leak into the triangular area, thereby reducing the cleaning difficulty of the triangular area. Meanwhile, the supporting block 5 formed by filling is a solid block, which has certain compressive strength and can avoid being crushed by the second straight screen section 13 and the lump coal 310. The supporting block 5 can support and reinforce the screen body 1, so that the bottom end of the second straight screen section 13 can be stably arranged on the supporting surface 2.

[0057] In the embodiment, the sorting screen 100 further comprises a baffle 6, and the baffle 6 is arranged on both sides of the screen body 1. The baffle 6 is used for blocking the falling of the screened material from both sides of the screen body 1. Please refer to Figure 2 The baffle 6 is arranged on both sides of the screen body 1 along the extension direction of the first straight screen section 11, the arc-shaped connecting section 12 and the second straight screen section 13, and the baffle 6 has a certain height. The arrangement can block the coal from falling out of the screen body 1 during sliding, thereby reducing the waste of the coal.

[0058] In the embodiment, the sorting screen 100 further comprises a stacking chute 7, and the stacking chute 7 is arranged on one side of the screen body 1 where the supporting frame 3 is arranged. The stacking chute 7 comprises an inclined surface 71 arranged at the bottom of the stacking chute 7, and the inclined surface 71 is arranged below the supporting surface 2 and parallel to the second straight screen section 13. Please refer to Figure 1The material stacking groove 7 is arranged below the support surface 2 and is arranged opposite to the bottom of the screen body 1 to receive the slack coal 320 falling from the screen body 1. The distance between the slope surface 71 and the support surface 2 is gradually increased from the first straight screen section 11 to the second straight screen section 13, and the slope surface 71 is arranged in parallel with the second straight screen section 13. The arrangement can increase the material stacking space below the screen body 1, and the slope design can provide sufficient working space for the forklift or the worker to enter the lower part of the screen body 1 to clean the stacked slack coal 320, thereby improving the cleaning efficiency of the slack coal 320.

[0059] In addition, in the embodiment of the utility model, the material stacking groove 7 further includes a side wall 72, the side wall 72 and the slope surface 71 form a material receiving space, the slope surface 71 is provided with a first reinforcing layer on the side facing the screen body 1, and the side wall 72 is provided with a second reinforcing layer on the side facing the material receiving space. Please refer to Figure 1 The rock-soil layer 400 is arranged below and on the side of the material stacking groove 7, to avoid the rock-soil in the rock-soil layer 400 from entering the slack coal 320 stack, the first reinforcing layer is arranged on the top of the slope surface 71, and the second reinforcing layer is arranged on the surface of the three side walls 72 of the material stacking groove 7. The first reinforcing layer and the second reinforcing layer each include one of a steel plate, a cement layer and a cement mortar layer. During construction, the slope surface 71 needs to bear mechanical equipment, so the compressive strength of the first reinforcing layer should be able to resist the resultant force of the live load of the mechanical equipment and the dead load of the slack coal 320 stack.

[0060] In the embodiment of the utility model, the support frame 3 includes a first support column 31, a second support column 32 and a reinforcing support 33, the first support column 31 is installed on the first straight screen section 11, and the reinforcing support 33 is installed between two adjacent first straight screen sections 11; the second support column 32 is installed on the second straight screen section 13 and / or the second support column 32 is installed on the arc-shaped connecting section 12. In the embodiment, the second support column 32 is installed on the arc-shaped connecting section 12. The number of the first support column 31 and the second support column 32 is two on each side, and the gap between the two first support columns 31 and the gap between the two second support columns 32 should be able to allow the mechanical equipment such as a forklift to pass. The reinforcing support 33 arranged between the first support columns 31 can further improve the working stability of the sorting screen 100.

[0061] The utility model also provides a sorting system, the sorting system includes sorting screen 100, the specific structure of sorting screen 100 refers to the above embodiment, because the sorting system adopts all the technical schemes of the above all embodiments, so it has all the beneficial effects brought by the technical schemes of the above embodiments at least, and here will not be repeated. Please refer to Figure 2The sorting system further comprises a conveying belt 200 arranged at one end of the first straight sieve section 11 away from the second straight sieve section 13, and the conveying belt 200 is arranged higher than the first straight sieve section 11. The conveying belt 200 is used to continuously and uniformly convey the mixed coal 300 to the first straight sieve section 11. By this arrangement, the mixed coal 300 can be avoided to be poured into the first straight sieve section 11 by using a chute or a forklift, thereby improving the working continuity and stability of the sorting sieve 100 and being beneficial to improving the sorting quality of the mixed coal 300.

[0062] The above merely illustrates the exemplary embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation or direct / indirect application in other related technical fields within the technical concept of the present application and the contents of the present application specification and drawings are included in the patent protection scope of the present application.

Claims

1. A sorting sieve, characterized in that, include: The sieve body includes a first straight sieve section, an arc-shaped connecting section, and a second straight sieve section extending from high to low. The first straight sieve section includes multiple parallel and spaced first straight rods. The first straight sieve section is provided with a first included angle between itself and the horizontal plane. The second straight screen section includes multiple parallel and spaced second straight rods, and a second included angle is provided between the second straight screen section and the horizontal plane, wherein the first included angle is greater than the second included angle; The arc-shaped connecting section includes multiple parallel and spaced arc-shaped rods, which are used to slow down the sliding speed of the material sliding down from the first straight screen section. Support surface; A support frame, the two ends of which are respectively connected to the bottom surface of the screen body and the support surface, to support the screen body.

2. The sorting sieve as described in claim 1, characterized in that: the first included angle is α, and the second included angle is β; Then α and β satisfy: 40°≤α≤60°, 20°≤β≤30°.

3. The sorting sieve as described in claim 1, characterized in that, The number of the first straight rod, the second straight rod, and the arc-shaped rod are the same, and the two ends of one arc-shaped rod are respectively connected to one of the first straight rods and one of the second straight rods.

4. The sorting sieve as described in claim 1, characterized in that, The sorting screen also includes multiple horizontal supports, which are installed parallel to each other on one side of the screen body facing the support surface. Each of the first straight screen section and the second straight screen section is provided with at least one horizontal support, which is perpendicular to the multiple first straight rods.

5. The sorting sieve as described in claim 1, characterized in that, The bottom end of the second straight screen section is disposed on the support surface. The second straight screen section includes a retention area near one end of the support surface, and the end of the second straight rod near the support surface extends into the retention area. The sorting screen further includes a support block, which is installed between the retention area and the support surface. The support block includes a first structural surface and a second structural surface. The first structural surface is fitted to the bottom of the retention area. The included angle between the first structural surface and the horizontal plane is the same as the second included angle. The second structural surface is fitted to the support surface.

6. The sorting sieve as described in claim 1, characterized in that, The sorting screen also includes baffles, which are installed on both sides of the screen body. The baffles are used to prevent the screened material from falling from both sides of the screen body.

7. The sorting sieve as described in claim 1, characterized in that, The sorting screen also includes a material stacking trough, which is located on the side of the screen body where the support frame is installed. The material stacking trough includes a sloping surface located at the bottom of the material stacking trough, which is located below the support surface and is parallel to the second straight screen section.

8. The sorting sieve as described in claim 7, characterized in that, The material trough also includes a side wall, which, together with the slope, forms a receiving space. A first reinforcing layer is provided on the side of the slope facing the screen body, and a second reinforcing layer is provided on the side of the side wall facing the receiving space.

9. The sorting sieve as described in any one of claims 1 to 8, characterized in that, The support frame includes a first support column, a second support column, and a reinforcing brace. The first support column is installed on the first straight screen section, and the reinforcing brace is installed between two adjacent first straight screen sections. The second support column is installed in the second straight screen section. And / or, the second support column is installed on the arc-shaped connecting section.

10. A sorting system, characterized in that, The sorting system includes the sorting screen as described in any one of claims 1 to 9, and further includes a conveyor belt disposed at one end of the first straight screen section away from the second straight screen section, and the conveyor belt is disposed above the first straight screen section.

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