Screening structure for small-particle-size particles

Abstract

The utility model relates to the technical field of mineral screening, in particular to a screening structure for small-particle-size particles, which comprises a main body which is integrally in a big-end-up prismatic table shape, a screening cavity is arranged in the main body, and the bottom surface of the main body is a downwards convex cambered surface; the arc-shaped screen is distributed in the width direction of the main body and arranged at the top of the main body; the knocking mechanism is arranged below the arc-shaped screen; the swing mechanism comprises a supporting plate, a pedal, a compression spring and a pull rod, one end of the pedal is hinged to the supporting plate, the compression spring is arranged between the other end of the pedal and the supporting plate, the end, provided with the compression spring, of the pedal is hinged to the pull rod, and the pull rod is detachably connected with one side wall in the length direction of the body. According to the screening structure for the small-particle-size particles, the swing mechanism is manually treaded to pull the main body to swing, overall operation is easy and convenient, the two hands of an operator are liberated, the knocking mechanism is arranged in the main body, the side wall of the main body is repeatedly separated from and makes contact with the knocking head in the swing process, and material blockage can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of mineral screening technology, and in particular to a screening structure for small-diameter particles. Background Technology

[0002] During mineral mining, various tests are required on the collected minerals to determine their physicochemical properties. Before testing, the collected minerals need to be crushed and screened to obtain samples of the required particle size. Sampling personnel manually use sieves to perform preliminary screening of the samples to be collected at the field mining site or crushing site, thereby obtaining samples of different particle sizes.

[0003] However, when preparing large batches of samples, manual sieving using sieves is inefficient. Automated sieving devices such as vibrating sieves are not only heavy and bulky, making them difficult for a single person to handle, but they also require electricity, have high environmental requirements, and are poorly adaptable.

[0004] Therefore, it is necessary to design a screening device that is easy to transport and has high screening efficiency to meet the screening needs of sampling personnel. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a screening structure for small-diameter particles, which solves the problems of existing automatic screening devices being large in size, difficult to transport, and having low adaptability, while manual screening devices have low screening efficiency and high manual operation intensity.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a sieving structure for small-diameter particles, comprising:

[0007] The main body is shaped like a frustum, wider at the top and narrower at the bottom. It has a screening cavity inside. A slag outlet is located in the middle of one side wall in the width direction of the main body, and a material outlet is located at the bottom of the other side wall in the width direction of the main body. The bottom surface of the main body is a convex arc surface.

[0008] An arc-shaped screen is distributed along the width of the main body and set on the top of the main body. The arc-shaped screen extends from the upper surface of the main body to the bottom of the main body. The arc-shaped screen divides the screening cavity into a coarse slag cavity and a fine particle cavity; the slag outlet is located in the coarse slag cavity.

[0009] The striking mechanism is located below the arc-shaped screen and includes a central rod, a first bearing, a striking head, and a connecting rod. The central rod has first bearings at both ends, which are respectively located on two side walls in the width direction of the main body. The striking head is located at one end of the connecting rod, and the other end of the connecting rod is connected to the central rod. At least two striking heads are provided, located between the two side walls in the length direction of the main body and the arc-shaped screen.

[0010] The swing mechanism includes a support plate, a pedal, a compression spring, and a pull rod. One end of the pedal is hinged to the support plate, and the other end of the pedal is connected to the support plate with a compression spring. The end of the pedal with the compression spring is hinged to the pull rod, and the pull rod is detachably connected to one side wall along the length of the main body.

[0011] In one embodiment, two arc-shaped screens are provided, and a striking head is also provided between the arc-shaped screens.

[0012] In one embodiment, the included angle between the connecting rods connecting the two striking heads located between the two side walls along the length of the main body and the arc-shaped screen is less than 180°.

[0013] In one embodiment, the striking mechanism further includes a counterweight, and a connecting lug is provided on the central rod. The connecting lug is located on the side of the connecting rod away from the arc-shaped screen, and the counterweight is connected to the connecting lug.

[0014] In one embodiment, the counterweight is connected to the middle of the connecting rod.

[0015] In one embodiment, the counterweight is connected to the center rod and the connecting rod by a nylon rope.

[0016] In one embodiment, the swing mechanism further includes a support frame connected to the first bearing, wherein the lowest point of the support frame is not higher than the lowest point of the main body.

[0017] In one embodiment, the connecting rod is detachably connected to the center rod and the striking head.

[0018] In one embodiment, the side of the arc-shaped screen closer to the slag outlet is higher than the side of the arc-shaped screen farther from the slag outlet; an inclined cover plate is provided above the arc-shaped screen, extending from the side of the arc-shaped screen farther from the slag outlet to the middle of the arc-shaped screen.

[0019] In one embodiment, the pull rod is a telescopic rod.

[0020] The beneficial effects of this utility model are as follows:

[0021] 1. The small-diameter particle screening structure provided by this utility model uses a manual foot-operated swing mechanism to pull the main body to swing. During the swinging process, the material to be screened is separated by the arc-shaped filter screen. The overall operation is simple, freeing up the operator's hands and allowing a single operator to complete the feeding and screening actions simultaneously, effectively improving operational efficiency. Moreover, the overall structure is lightweight, low-cost, and easy to move and transport, possessing good practical value.

[0022] 2. The small-diameter particle screening structure provided by this utility model has an internal striking mechanism. During the swinging process, the side wall of the main body and the striking head repeatedly separate and contact, thereby generating vibration. This can prevent material from clogging the screen and depositing on the side wall. The overall structure is simple and reliable, easy to maintain, and can further improve screening efficiency. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the internal structure of an embodiment of the present utility model;

[0025] Figure 2 for Figure 1 The main view of the embodiment;

[0026] Figure 3 for Figure 1 Right view of the embodiment;

[0027] Figure 4 for Figure 1 Top view of the embodiment;

[0028] Figure 5 for Figure 4 Top view after removing the curved screen;

[0029] Figure 6 This is a top view of an embodiment of the present invention with an inclined cover plate.

[0030] Label Explanation:

[0031] 1. Screening structure for small-diameter particles; 11. Main body; 111. Screening cavity; 1111. Coarse slag cavity; 1112. Fine particle cavity; 112. Slag outlet; 113. Discharge outlet; 12. Arc-shaped screen; 121. Inclined cover plate; 13. Striking mechanism; 131. Central rod; 132. First bearing; 133. Striking head; 134. Connecting rod; 135. Counterweight; 136. Nylon rope; 137. Support frame; 138. Connecting lug; 14. Swinging mechanism; 141. Support plate; 142. Pedal; 143. Compression spring; 144. Pull rod. Detailed Implementation

[0032] 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, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0033] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] Please refer to Figures 1 to 6 A sieving structure 1 for small-diameter particles, comprising:

[0035] The main body 11 is shaped like a frustum, wider at the top and narrower at the bottom. It has an internal screening cavity 111. A slag outlet 112 is located in the middle of one side wall along the width direction of the main body 11, and a discharge outlet 113 is located at the bottom of the other side wall along the width direction. The bottom surface of the main body 11 is a convex arc surface. Specifically, the top of the main body 11 has a rectangular opening, and the side walls extend sloping from the four sides of the rectangular opening towards the bottom arc surface, forming a frustum with an internal separation cavity. The arc surface at the bottom of the frustum allows it to swing under force. With the longer side of the rectangular opening as the length direction and the shorter side as the width direction, the slag outlet 112 and the discharge outlet 113 are respectively located on the two side walls along the width direction, with the slag outlet 112 being higher than the discharge outlet 113. Specifically, the bottom surface of the main body 11 can be partially spherical, allowing the main body 11 to swing in all directions, facilitating screening and unloading.

[0036] An arc-shaped screen 12 is distributed along the width direction of the main body 11 and is set on the top of the main body 11. The arc-shaped screen 12 extends from the upper surface of the main body 11 to the bottom of the main body 11, dividing the screening cavity 111 into a coarse slag cavity 1111 and a fine particle cavity 1112; the slag outlet 112 is located in the coarse slag cavity 1111. Specifically, the arc-shaped screen 12 is detachably connected to the main body 11, which allows the operator to select an appropriate mesh size arc-shaped screen 12 according to the screening requirements.

[0037] The striking mechanism 13 is located below the arc-shaped screen 12 and distributed along the width direction of the main body 11. The striking mechanism 13 includes a central rod 131, a first bearing 132, striking heads 133, and a connecting rod 134. The first bearings 132 are located at both ends of the central rod 131 and are respectively located on two side walls in the width direction of the main body 11. The striking heads 133 are located at one end of the connecting rod 134, and the other end of the connecting rod 134 is connected to the central rod 131. At least two striking heads 133 are provided, located between the two side walls in the length direction of the main body 11 and the arc-shaped screen 12. After the central rod 131 is connected to the first bearing 132, it can rotate freely relative to the main body 11. At the same time, the striking heads 133 on the central rod 131 and the connecting rod 134 form a balanced lever structure, so that the striking heads 133 are at the same height. When the main body 11 swings back and forth, the central rod 131 follows the main body 11 and moves in an arc-shaped trajectory, providing centrifugal force to the striking heads 133 and connecting rods 134 on both sides. At the same time, the overall center of gravity and potential energy of the striking mechanism 13 change during the swing. Under the action of both sides, the striking heads 133 can touch the side wall or the arc-shaped screen 12 respectively, generating vibration and achieving the striking effect.

[0038] Specifically, the first bearing 132 can be a rolling bearing, so that the central rod 131 can rotate freely relative to the main body 11. Those skilled in the art can select a suitable bearing as needed, without making specific limitations.

[0039] The swing mechanism 14 includes a support plate 141, a pedal 142, a compression spring 143, and a pull rod 144. One end of the pedal 142 is hinged to the support plate 141, and the other end of the pedal 142 is provided with a compression spring 143 between it and the support plate 141. The end of the pedal 142 with the compression spring 143 is hinged to the pull rod 144. The pull rod 144 is detachably connected to one side wall of the main body 11 in the length direction.

[0040] Understandably, the small-diameter particle screening structure 1 provided by this utility model uses a manual foot-operated swing mechanism 14 to pull the main body 11 to swing. During the swinging process, the material to be screened is separated by the arc-shaped filter screen. The overall operation is simple, freeing up the operator's hands and allowing a single operator to complete the feeding and screening actions simultaneously. This not only reduces labor intensity but also effectively improves operational efficiency. Furthermore, the main body 11 is equipped with a striking mechanism 13. During the swinging process, the side wall of the main body 11 repeatedly separates and contacts the striking head 133, thereby generating vibration. This can prevent material from clogging the screen and depositing on the side wall. The overall structure is simple, reliable, and easy to maintain, while further improving screening efficiency.

[0041] In one embodiment, two arc-shaped screens 12 are provided, and striking heads 133 are also provided between the arc-shaped screens 12. That is, at least three sets of striking heads 133 and connecting rods 134 are provided, and the three sets of striking heads 133 and connecting rods 134 are in the same vertical plane. This arrangement can further enhance the change of the center of gravity of the striking mechanism 13 during the swinging process, causing the central rod 131 to rotate, increasing the striking force and the number of striking points, enhancing the striking effect, and thus improving the screening efficiency.

[0042] In one embodiment, the included angle of the connecting rod 134 connecting the two striking heads 133 located between the two side walls of the main body 11 and the arc-shaped screen 12 along the length direction is less than 180°. That is, when the striking heads 133 on both sides are at the same height, the end of the connecting rod 134 connected to the striking head 133 is higher than the end of the connecting rod 134 connected to the central rod 131. This arrangement ensures that the center of gravity of the striking mechanism 13 coincides with the axis of the central rod 131 only when the main body 11 is vertical. During the swinging process, the centrifugal force provided by the central rod 131 to the striking head 133 is enhanced, thereby increasing the striking force and improving the screening efficiency.

[0043] In one embodiment, the striking mechanism 13 further includes a counterweight 135, and a connecting lug 138 is provided on the central rod 131. The connecting lug 138 is located on the side of the connecting rod 134 away from the arc-shaped screen 12, and the counterweight 135 is connected to the connecting lug 138. After the counterweight is set, the central rod 131 rotates under the action of gravity during the swing, which further enhances the centrifugal force provided by the central rod 131 to the striking head 133, enhances the striking effect, and thus improves the screening efficiency.

[0044] In one embodiment, the counterweight 135 is connected to the middle of the connecting rod 134. This arrangement enhances the counterweight 135's ability to adjust the center of gravity of the striking mechanism 13, ensuring that the central rod 131 rotates normally under the action of the counterweight 135. At the same time, it can fully utilize the lateral potential energy of the counterweight 135 during the swinging process, thereby increasing the striking force.

[0045] In one embodiment, the counterweight 135 is connected to the center rod 131 and the connecting rod 134 by a nylon rope 136. That is, the counterweight 135 is flexibly connected by a nylon rope 136, which facilitates installation and replacement while preventing the counterweight 135 from falling off due to vibration.

[0046] Preferably, the striking head 133 is covered with a rubber layer. This design provides cushioning and prevents damage caused by excessive force on the striking point.

[0047] In one embodiment, the swing mechanism 14 further includes a support frame 137 connected to the first bearing 132. The lowest point of the support frame 137 is not higher than the lowest point of the main body 11. Specifically, the support frame 137 can be two brackets hinged to the first bearing 132 on each side, forming a triangular support when the brackets are opened, which is convenient for operators to unfold or store according to actual conditions. Alternatively, a triangular frame or rectangular frame that is fixed as a whole can be used, without specific limitations. The main body 11 is supported by the support frame 137, allowing the main body 11 to be placed stably on a plane or inclined surface, enhancing the stability of the main body 11. At the same time, after the support frame 137 is set, the main body 11 rotates around the first bearing 132 under the action of the swing mechanism 14, the central rod 131 does not shift, the swing mechanism 14 maintains a balanced state, and the side wall of the main body 11 touches the striking head 133 after rotation, forcing the swing mechanism 14 to swing back and forth to complete the striking action.

[0048] Preferably, the connecting rod 134 is detachably connected to the central rod 131 and the striking head 133. Specifically, both ends of the connecting rod 134 are screwed to the central rod 131 and the striking head 133, respectively. This arrangement allows operators to easily replace the connecting rod 134 or the striking head 133 as needed, while also facilitating the overall installation or disassembly of the screening structure, reducing maintenance and transportation difficulties, and improving portability.

[0049] In one embodiment, the side of the arc-shaped screen 12 closest to the slag outlet 112 is higher than the side of the arc-shaped screen 12 furthest from the slag outlet 112. An inclined cover plate 121 is provided above the arc-shaped screen 12, extending from the side of the arc-shaped screen 12 furthest from the slag outlet 112 to the middle of the arc-shaped screen 12. This arrangement facilitates material feeding by the operator. After the material contacts the inclined cover plate 121, it preferentially contacts the side of the arc-shaped screen 12 closest to the slag outlet 112. The separated coarse slag is collected on the side furthest from the slag outlet 112, enabling the screening device to collect materials of different particle sizes during continuous screening. After screening, the material is poured out and collected, improving the continuity of the screening process and increasing the separation efficiency.

[0050] Preferably, gates are provided on the slag outlet 112 and the material outlet 113. This arrangement facilitates the collection of separated materials by operators.

[0051] In one embodiment, the pull rod 144 is a telescopic rod, and the operator can adjust the length of the pull rod 144 as needed. This not only adjusts the swing amplitude of the main body 11, but also allows it to be used even when the placement surface is an inclined surface or a stepped surface, thus improving the overall adaptability.

[0052] Please refer to Figures 1 to 6 Embodiment 1 of this utility model is: a sieving structure 1 for small-diameter particles, comprising:

[0053] The main body 11 is in the shape of a frustum with a larger top and a smaller bottom. It has a screening cavity 111 inside. A slag outlet 112 is provided in the middle of one side wall in the width direction of the main body 11, and a discharge outlet 113 is provided at the bottom of the other side wall in the width direction of the main body 11. The bottom surface of the main body 11 is a convex arc surface.

[0054] An arc-shaped screen 12 is distributed along the width direction of the main body 11 and is set on the top of the main body 11. The arc-shaped screen 12 extends from the upper surface of the main body 11 to the bottom of the main body 11. The arc-shaped screen 12 divides the screening cavity 111 into a coarse slag cavity 1111 and a fine particle cavity 1112. The slag outlet 112 is located in the coarse slag cavity 1111. There are two arc-shaped screens 12.

[0055] The striking mechanism 13 is located below the arc-shaped screen 12 and includes a central rod 131, a first bearing 132, a striking head 133, and a connecting rod 134. The central rod 131 has first bearings 132 at both ends, which are respectively located on two side walls in the width direction of the main body 11. The striking head 133 is located at one end of the connecting rod 134, and the other end of the connecting rod 134 is connected to the central rod 131. Three striking heads 133 are provided, located between the two side walls in the length direction of the main body 11 and the arc-shaped screen 12, and between the two arc-shaped screens 12.

[0056] The swing mechanism 14 includes a support plate 141, a pedal 142, a compression spring 143, and a pull rod 144. One end of the pedal 142 is hinged to the support plate 141, and the other end of the pedal 142 is provided with a compression spring 143 between it and the support plate 141. The end of the pedal 142 with the compression spring 143 is hinged to the pull rod 144. The pull rod 144 is detachably connected to one side wall of the main body 11 in the length direction.

[0057] The striking mechanism 13 also includes a counterweight 135. A connecting lug 138 is provided on the central rod 131. The connecting lug 138 is located on the side of the connecting rod 134 away from the arc-shaped screen 12. The counterweight 135 is connected to the connecting lug 138 and the middle of the connecting rod 134. The counterweight 135 is connected to the central rod 131 and the connecting rod 134 through a nylon rope 136.

[0058] In this embodiment, the side of the arc-shaped screen 12 closest to the slag outlet 112 is higher than the side of the arc-shaped screen 12 furthest from the slag outlet 112; an inclined cover plate 121 is provided above the arc-shaped screen 12, and the inclined cover plate 121 extends from the side of the arc-shaped screen 12 furthest from the slag outlet 112 to the middle of the arc-shaped screen 12.

[0059] The working principle of this utility model is as follows: Before use, the operator places the swing mechanism 14 and connects the pull rod 144 to the main body 11. After installation, the operator pours the material onto the inclined cover plate 121, and the material slides down the inclined cover plate 121 into the arc-shaped screen 12. While pouring, the operator steps on the pedal 142, compressing the spring 143. Then, the operator releases the pedal 142, and the spring 143 pushes the pedal 142 up. The continuous stepping and releasing process causes the pull rod 144 to pull the main body 11 to swing. The swing causes small-diameter material to pass through the arc-shaped screen 12 and fall to the bottom of the main body 11, while coarse slag is collected on the side of the arc-shaped screen 12 away from the slag outlet 112. At the same time, during the swing, the striking head 133 strikes the main body 11 and the arc-shaped screen 12 to prevent blockage. After screening, the operator pours out and collects the material of different particle sizes through the slag outlet 112 and the material outlet 113.

[0060] Although this document uses numerous terms such as screening structure for small-diameter particles, main body, screening cavity, coarse slag cavity, fine particle cavity, slag outlet, discharge outlet, arc screen, inclined cover plate, striking mechanism, central rod, first bearing, striking head, connecting rod, counterweight, nylon rope, support frame, swing mechanism, support plate, pedal, compression spring, and pull rod, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A screening structure (1) of small-diameter particles, characterized in that, The utility model relates to a kind of arc screen, which comprises: Main body (11), it is overall the truncoconical shape of upper big and lower small, inside with screening cavity (111), the middle part of the side wall of the main body (11) in width direction is equipped with slag outlet (112), the bottom of the other side wall of the main body (11) in width direction is equipped with discharge port (113);The bottom surface of the main body (11) is lower convex arc surface; Arc screen (12), it is distributed along the main body (11) in width direction and is arranged at the top of the main body (11), the arc screen (12) extends from the upper surface of the main body (11) to the bottom of the main body (11), the arc screen (12) separates the screening cavity (111) into coarse slag cavity (1111) and fine particle cavity (1112);The slag outlet (112) is located in the coarse slag cavity (1111); Knocking mechanism (13), it is arranged below the arc screen (12), including center rod (131), first bearing (132), knocking head (133) and connecting rod (134);The both ends of the center rod (131) are equipped with the first bearing (132), the first bearing (132) is arranged on the two side walls of the main body (11) in width direction respectively;The knocking head (133) is arranged at one end of the connecting rod (134), the other end of the connecting rod (134) is connected with the center rod (131);The knocking head (133) is at least provided with 2, and it is located between the two side walls of the main body (11) in length direction and the arc screen (12) respectively; Swing mechanism (14), including support plate (141), pedal (142), compression spring (143) and pull rod (144), one end of the pedal (142) is hinged with the support plate (141), the other end of the pedal (142) and the support plate (141) are equipped with the compression spring (143), one end of the pedal (142) provided with the compression spring (143) is hinged with the pull rod (144), and the pull rod (144) is detachably connected with one side wall of the main body (11) in length direction.

2. Sieving arrangement (1) for small-diameter particles according to claim 1, characterized in that: The arc screen (12) is provided with two, and the knocking head (133) is also arranged between the arc screen (12).

3. Sieving arrangement (1) for small-diameter particles according to claim 2, characterized in that: The included angle of the connecting rod (134) connected with the two knocking heads (133) between the two side walls of the main body (11) in length direction and the arc screen (12) is less than 180 °.

4. Sieving structure (1) of small-diameter particles according to claim 1, characterized in that: The knocking mechanism (13) further includes counterweight (135), the center rod (131) is equipped with connecting lug (138), the connecting lug (138) is located on the side, away from the arc screen (12), of the connecting rod (134), and the counterweight (135) is connected with the connecting lug (138).

5. Sieving arrangement (1) for small-diameter particles according to claim 4, characterized in that: The counterweight (135) is connected with the middle part of the connecting rod (134).

6. Sieving arrangement (1) for small-diameter particles according to claim 5, characterized in that: The counterweight (135) is connected with the center rod (131) and the connecting rod (134) by nylon rope (136).

7. Sieving arrangement (1) for small-diameter particles according to claim 4, characterized in that: The swing mechanism (14) further comprises a support frame (137) connected with the first bearing (132), and a lowest point of the support frame (137) is not higher than a lowest point of the main body (11).

8. Sieving arrangement (1) for small-diameter particles according to claim 1, characterized in that: The connecting rod (134) is detachably connected with the center rod (131) and the knocking head (133).

9. Sieving arrangement (1) for small-diameter particles according to claim 1, characterized in that: The side of the arc-shaped screen (12) close to the slag outlet (112) is higher than the side of the arc-shaped screen (12) away from the slag outlet (112); an inclined cover plate (121) is arranged above the arc-shaped screen (12), and the inclined cover plate (121) extends from the side of the arc-shaped screen (12) away from the slag outlet (112) to the middle of the arc-shaped screen (12).

10. Sieving arrangement (1) for small-diameter particles according to claim 1, characterized in that: The pull rod (144) is a telescopic rod.

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