Separating screen, screening device and screening system

Abstract

The utility model provides a separating screen, a screening device and a screening system, which comprise a barrel-shaped external part, and further comprise a middle part which is sleeved in the external part and forms an annular area with the side wall of the external part, and a feeding part, a first blanking part, a blanking part and a second blanking part which are sequentially connected end to end and distributed in the annular area, a sorting inlet and a sorting outlet are formed in the side wall of the external part, the sorting inlet is communicated with the feeding part, the sorting outlet is communicated with the discharging part, the first discharging part and the second discharging part respectively comprise a plurality of arc-shaped sorting strips, the sorting strips are sequentially arranged at equal intervals in the radial direction, and the sorting strips are arranged at intervals in the radial direction. A sorting gap is formed between every two adjacent sorting strips, the width of each sorting gap is larger than that of each sorting strip, one end of each sorting strip is connected with the feeding part, and the other end of each sorting strip is connected with the discharging part. The space occupied by the separating screen, the screening device and the screening system can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of steel ball screening technology, and in particular to a sorting sieve, screening device and screening system. Background Technology

[0002] Energy conservation and consumption reduction are among the production requirements. The electricity consumption of ball mills in thermal power plants accounts for 0.8% of the total electricity consumption of the plant. Therefore, reducing the electricity consumption of ball mills and improving their grinding efficiency is particularly important for thermal power plants.

[0003] The screening of steel balls in a ball mill is a key step in ensuring the efficient operation of the equipment. The main reasons include the following: (1) Steel ball wear leads to a decrease in efficiency. During the coal grinding process, steel balls will gradually wear down, deform, or even break due to impact, compression, and grinding. After the volume shrinks to a certain extent (such as less than φ25mm or φ30mm), its impact and grinding capacity will be significantly reduced, resulting in increased power consumption, reduced output, and even problems such as over-grinding. If the balls are not screened and replaced in time, the coal mill will not be able to maintain its designed output, affecting the economy of the entire pulverizing system. (2) Optimize the gradation and ratio of steel balls. Different specifications of steel balls (such as φ60mm, φ45mm, φ30mm) in the coal mill need to be distributed in a reasonable gradation ratio to adapt to the particle size of raw coal and the grinding requirements. Steel ball screening can remove ineffective small balls and add new balls to maintain the best ratio, thereby improving the fineness of coal powder and pulverizing efficiency. For example, large balls are responsible for crushing large chunks of raw coal, while small balls refine the coal powder. An imbalance in the ratio will directly lead to excessive coal powder fineness or a decrease in pulverization output. By screening and retaining qualified steel balls and optimizing the ratio, ineffective power consumption can be reduced, and the output of the coal mill can be increased, thereby reducing coal consumption for power generation and operating costs. In summary, steel ball screening is a necessary measure to maintain the long-term efficient and economical operation of steel ball coal mills.

[0004] Currently, steel ball sorting screens typically consist of multiple equally spaced sorting bars. The projection of these bars onto a horizontal plane is linear. Steel balls are sorted using the gaps between the bars. Balls smaller than the gap fall down, while those larger roll along the length of the bars and are thus removed from the screen. However, because the projections of the sorting bars are linear and the edges of the gaps are also linear, effective steel ball screening requires relatively long sorting bars. This results in a long screen and a large overall space requirement for the sorting device.

[0005] Therefore, it is necessary to develop a sorting sieve, screening device, and screening system to reduce the space occupied by the sorting sieve, screening device, and screening system. Utility Model Content

[0006] The purpose of this invention is to provide a sorting sieve, screening device, and screening system to solve the problem that existing sorting sieves, screening devices, and screening systems occupy a large amount of space.

[0007] To solve the above-mentioned technical problems, this utility model provides a sorting screen, including a cylindrical outer component and an intermediate component sleeved in the outer component and forming an annular area with the side wall of the outer component. A feeding component, a first unloading component, a discharging component, and a second unloading component are sequentially arranged end-to-end within the annular area. The side wall of the outer component has a sorting inlet and a sorting outlet. The sorting inlet communicates with the feeding component, and the sorting outlet communicates with the discharging component. The first and second unloading components each include multiple arc-shaped sorting bars. The sorting bars are arranged radially at equal intervals, with a sorting gap between adjacent sorting bars. The width of the sorting gap is greater than the width of the sorting bar. One end of each sorting bar is connected to the feeding component, and the other end is connected to the discharging component.

[0008] Optionally, the sorting sieve further includes a connector, which is connected to the sorting bar.

[0009] Optionally, the connector extends from the innermost sorting bar to the outermost sorting bar.

[0010] Optionally, the first blanking component and the second blanking component are symmetrically distributed about the intermediate component.

[0011] Optionally, a guide member may also be provided on the feeding component.

[0012] Optionally, the guide includes a first plate and a second plate, the first plate and the second plate are connected and have an included angle, and the openings of the first plate and the second plate face the unloading component.

[0013] This utility model also provides a screening device, including a support frame and the above-mentioned sorting sieve, wherein the sorting sieve is connected to the support frame.

[0014] Optionally, the sorting screen is inclined relative to the horizontal plane, and the sorting inlet is located at a high position and the sorting outlet is located at a low position.

[0015] Optionally, there are multiple sorting screens connected in descending order of height. The sorting outlet of the higher sorting screen in two adjacent sorting screens is connected to the sorting inlet of the lower sorting screen in two adjacent sorting screens, and the sorting gap of the sorting screens increases from high to low.

[0016] This utility model also provides a screening system, including a support, a gripping device for gripping steel balls and the aforementioned screening device, wherein the gripping device is movable relative to the support and the screening device is located on the movement path of the gripping device.

[0017] The sorting sieve, screening device, and screening system provided by this utility model have the following beneficial effects:

[0018] A cylindrical outer component, an intermediate component fitted inside the outer component and forming an annular area with the side wall of the outer component, and sequentially arranged within the annular area are a loading component, a first unloading component, an unloading component, and a second unloading component. The side wall of the outer component has a sorting inlet and a sorting outlet. The sorting inlet communicates with the loading component, and the sorting outlet communicates with the unloading component. Therefore, when the steel ball enters the annular area formed by the side wall of the outer component and the intermediate component from the sorting inlet, a portion enters the first unloading component from the loading component, then a portion enters the unloading component, and another portion enters the second unloading component from the loading component, then a portion enters the unloading component, and finally enters the sorting outlet from the unloading component, and finally rolls out. Since the first unloading component and the second unloading component each include... Multiple arc-shaped sorting bars are arranged radially at equal intervals, with a sorting gap between adjacent bars. The width of the sorting gap is greater than the width of the sorting bar. One end of each sorting bar is connected to the feeding component, and the other end is connected to the unloading component. Therefore, when a steel ball enters the sorting gap, steel balls smaller than the gap fall out, while steel balls larger than the gap roll out from the sorting outlet. This achieves the screening of steel balls. Furthermore, the arc shape of the sorting gap caused by the sorting bars increases the rolling length of the steel ball along the gap, facilitating the fall of steel balls smaller than the gap. This shortens the length of the sorting screen, and since the height of the sorting screen is limited, the space occupied by the sorting screen and screening device can be reduced. Furthermore, the separation gap formed between the arc-shaped separation bars allows the steel balls to roll along the arc-shaped separation bars, thus acting as a buffer and increasing the rolling time of the steel balls in the separation screen. This allows steel balls smaller than the separation gap to be effectively screened out, improving the steel ball screening effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the sorting sieve in an embodiment of this utility model;

[0020] Figure 2 This is a front view of the grasping device in the screening system of this utility model embodiment;

[0021] Figure 3 This is a side view of the grasping device in the screening system of this utility model embodiment.

[0022] Explanation of reference numerals in the attached figures:

[0023] 100 - External component; 110 - Sorting inlet; 120 - Sorting outlet; 200 - Intermediate component; 300 - Loading component; 400 - First unloading component; 410 - Sorting bar; 420 - Sorting gap; 500 - Unloading component; 600 - Second unloading component; 700 - Connecting component; 800 - Flow guide component; 810 - First plate; 820 - Second plate;

[0024] 911-Inner support frame of the tank; 912-Outer support frame of the tank; 920-Gripping device; 921-Slide rail; 922-Tractor; 923-Electromagnetic chuck. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used in the description of components and should not be construed as indicating or implying relative importance.

[0029] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a sorting sieve in this embodiment of the present invention. This embodiment provides a sorting sieve, including a cylindrical outer component 100, an intermediate component 200 fitted inside the outer component 100 and forming an annular region with the side wall of the outer component 100, and a feeding component 300, a first discharge component 400, a discharge component 500, and a second discharge component 600 sequentially connected end-to-end within the annular region. The side wall of the outer component 100 has a sorting inlet 110 and a sorting outlet 120. The sorting inlet 110 is connected to the... The loading component 300 is connected, the sorting outlet 120 is connected to the unloading component 500, the first unloading component 400 and the second unloading component 600 each include multiple arc-shaped sorting bars 410, the sorting bars 410 are arranged at equal intervals along the radial direction, and there is a sorting gap 420 between adjacent sorting bars 410. The width of the sorting gap 420 is greater than the width of the sorting bar 410. One end of the sorting bar 410 is connected to the loading component 300, and the other end is connected to the unloading component 500.

[0032] A cylindrical outer component 100 is fitted inside the outer component 100, forming an annular area with the side wall of the outer component 100. Within this annular area, a feeding component 300, a first unloading component 400, an unloading component 500, and a second unloading component 600 are sequentially arranged end-to-end. The side wall of the outer component 100 has a sorting inlet 110 and a sorting outlet 120. The sorting inlet 110 communicates with the feeding component 300, and the sorting outlet... 120 is connected to the unloading component 500. Therefore, when the steel balls enter the annular area formed by the side wall of the outer component 100 and the intermediate component 200 from the sorting inlet 110, a portion enters the first unloading component 400 from the loading component 300, then a portion enters the unloading component 500, and another portion enters the second unloading component 600 from the loading component 300, then a portion enters the unloading component 500, and then enters the sorting outlet 120 from the unloading component 500, finally rolling out; because the first unloading component 400... The 0 and the second unloading component 600 each include multiple arc-shaped sorting bars 410. The sorting bars 410 are arranged radially at equal intervals, and there is a sorting gap 420 between adjacent sorting bars 410. The width of the sorting gap 420 is greater than the width of the sorting bar 410. One end of the sorting bar 410 is connected to the loading component 300, and the other end is connected to the unloading component 500. Therefore, when the steel ball enters the sorting gap 420, its size is smaller than the sorting gap. Steel balls with a size larger than 420 fall out, while those larger than the separation gap 420 roll out from the separation outlet 120. This achieves the screening of steel balls. Furthermore, the arc shape of the separation gap 420 caused by the separation bars 410 increases the rolling length of the steel balls along the gap, facilitating the fall of steel balls smaller than the gap 420. This shortens the length of the sorting screen, and since the height of the screen is limited, it reduces the space occupied by the screen and screening device. Additionally, the separation gap 420 formed between the arc-shaped separation bars 410 allows the steel balls to roll along them, acting as a buffer and increasing the rolling time of the steel balls in the screen. This effectively screens out steel balls smaller than the gap 420, improving the steel ball screening effect.

[0033] The sorting bar 410 is an arc-shaped circular tube.

[0034] The intermediate component 200 is cylindrical, which reduces the weight of the sorting screen.

[0035] Preferably, the intermediate component 200 and the outer component 100 protrude from the plane containing the first discharge component 400 and the second discharge component 600. This prevents the steel balls from falling from the sorting sieve without being screened.

[0036] The sorting screen also includes a connector 700, which is connected to the sorting bar 410.

[0037] The connector 700 is preferably arranged radially along the sorting bar 410.

[0038] Preferably, the connector 700 extends from the innermost sorting bar 410 to the outermost sorting bar 410.

[0039] The connector 700 is also connected to the external component 100.

[0040] The connector 700 is preferably a steel bar.

[0041] The feeding component 300 is connected to the outer component 100 and the intermediate component 200.

[0042] The feeding component 300 is plate-shaped.

[0043] Specifically, the feeding plate is arc-shaped.

[0044] The unloading component 500 is connected to the outer component 100 and the intermediate component 200.

[0045] The blanking component 500 is plate-shaped.

[0046] Preferably, the first blanking component 400 and the second blanking component 600 are symmetrically distributed about the intermediate component 200.

[0047] The sorting screen also includes a guide member 800 disposed on the feeding member 300. This facilitates the entry of steel balls into the first discharge member 400 and the second discharge member 600.

[0048] Specifically, the guide member 800 includes a first plate 810 and a second plate 820, the first plate 810 and the second plate 820 are connected and have an included angle, and the openings of the first plate 810 and the second plate 820 face the unloading member 500.

[0049] Preferably, the open ends of the first plate 810 and the second plate 820 are connected to the intermediate member 200. This prevents the steel ball from getting stuck in the guide member 800.

[0050] This embodiment also provides a screening device, including a support frame and a sorting sieve as described in the above embodiment, wherein the sorting sieve is connected to the support frame.

[0051] Preferably, the sorting screen is inclined relative to the horizontal plane, with the sorting inlet 110 located at a high position and the sorting outlet 120 located at a low position. This facilitates the steel balls entering the sorting screen from the sorting inlet 110, rolling within the screen, and rolling out from the sorting outlet 120.

[0052] Furthermore, there are multiple sorting screens, which are connected sequentially from high to low. The sorting outlet 120 of the higher sorting screen among two adjacent sorting screens is connected to the sorting inlet 110 of the lower sorting screen among two adjacent sorting screens, and the sorting gap 420 of the sorting screens increases sequentially from high to low.

[0053] Furthermore, the sorting inlet 110 of the sorting screen is connected to an inlet channel, and the sorting outlet 120 of the sorting screen is connected to an outlet channel, wherein the width of the inlet channel is greater than the width of the outlet channel.

[0054] Furthermore, the outlet channel of the higher-positioned sorting screen in two adjacent sorting screens is detachably and fixedly connected to the inlet channel of the lower-positioned sorting screen in two adjacent sorting screens, for example, by bolt connection.

[0055] All support frames adopt a triangular structure and are connected by bolts, which facilitates transportation, disassembly and installation.

[0056] The number of sorting sieves is preferably three.

[0057] The sorting gaps 420 of the three sorting screens are 30mm, 45mm, and 60mm from high to low. This allows for the sorting of steel balls by size. For example, it can sort steel balls smaller than 30mm, steel balls between 30mm and 45mm, steel balls between 45mm and 60mm, and steel balls larger than 60mm.

[0058] The screening device also includes a collection box, which is located below the sorting screen and below the sorting outlet 120 of the lowest sorting screen.

[0059] refer to Figure 2 and Figure 3 , Figure 2 This is a front view of the grasping device 920 in the screening system of this utility model embodiment. Figure 3 This is a side view of the gripping device 920 in the screening system of this embodiment. This embodiment also provides a screening system including a support, a gripping device 920 for gripping steel balls, and the screening device described in the above embodiment. The gripping device 920 is movable relative to the support, and the screening device is located on the moving path of the gripping device 920. Thus, the gripping device 920 can grip the steel balls and transport them to the screening device.

[0060] Specifically, the gripping device 920 includes a slide rail 921, a traveling trolley 922, and an electromagnetic chuck 923. The support frame includes an internal support frame 911 and an external support frame 912. The slide rail 921 is supported by the internal support frame 911 and the external support frame 912. The traveling trolley 922 is slidably connected to the slide rail 921. The electromagnetic chuck 923 is mounted on the traveling trolley 922, and the screening device is located on the moving trajectory of the electromagnetic chuck 923. In this way, steel balls inside the ball mill can be transported to the screening device for screening.

[0061] Both the inner support frame 911 and the outer support frame 912 of the tank adopt a triangular structure and are connected by bolts, which facilitates transportation, disassembly and installation.

[0062] The slide rail 921 is composed of three 6-meter-long I-beams, which are fixed to the inner support frame 911 and the outer support frame 912 of the tank by bolts. The length can be freely assembled according to the depth of the ball mill, so as to adapt to ball mills of different depths.

[0063] The 922 overhead crane has a load capacity of 3 tons.

[0064] The electromagnetic chuck 923 has a diameter of 80cm, a weight of 700kg, and can hold a 200-300kg steel ball at a time.

[0065] When the screening system is working, the electromagnetic chuck 923 picks up steel balls from the ball mill and transports them to the top of the screening device via the crane 922. The steel balls then enter the screening screen through the inlet channel of the highest screening screen for sorting.

[0066] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A sorting sieve, comprising a cylindrical outer component, characterized in that, It also includes an intermediate component fitted inside the outer component and forming an annular area with the side wall of the outer component, and a feeding component, a first unloading component, an unloading component, and a second unloading component arranged sequentially end to end within the annular area. The side wall of the outer component has a sorting inlet and a sorting outlet. The sorting inlet is connected to the feeding component, and the sorting outlet is connected to the unloading component. The first unloading component and the second unloading component each include multiple arc-shaped sorting bars. The sorting bars are arranged radially at equal intervals, and there is a sorting gap between adjacent sorting bars. The width of the sorting gap is greater than the width of the sorting bar. One end of the sorting bar is connected to the feeding component, and the other end is connected to the unloading component.

2. The sizing screen of claim 1, wherein, The sorting sieve also includes a connector, which is connected to the sorting bar.

3. The sizing screen of claim 2, wherein, The connector extends from the innermost sorting bar to the outermost sorting bar.

4. The sizing screen of claim 1, wherein, The first blanking component and the second blanking component are symmetrically distributed about the intermediate component.

5. The sizing screen of claim 1, wherein, It also includes a guide member disposed on the feeding component.

6. The sizing screen of claim 5, wherein, The guide includes a first plate and a second plate, which are connected and have an included angle. The openings of the first plate and the second plate face the unloading component.

7. A screening device characterized by, It includes a support frame and a sorting screen as described in any one of claims 1-6, wherein the sorting screen is connected to the support frame.

8. The screening device of claim 7, wherein, The sorting screen is inclined relative to the horizontal plane, with the sorting inlet located at a high position and the sorting outlet located at a low position.

9. The screening device of claim 8, wherein, The number of sorting screens is multiple, and the multiple sorting screens are connected in sequence from high to low. The sorting outlet of the higher sorting screen among two adjacent sorting screens is connected to the sorting inlet of the lower sorting screen among two adjacent sorting screens, and the sorting gap of the sorting screens increases from high to low.

10. A screening system, characterized in that, The device includes a support, a gripping device for gripping a steel ball, and a screening device as described in any one of claims 7-9, wherein the gripping device is movable relative to the support and the screening device is located on the movement path of the gripping device.

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