A combined screen with a raking screen rod capable of automatically removing mud

Abstract

The present application relates to coal mine material screening technical field, especially to a kind of automatic mud removal's poking sieve rod composite screen, including machine body, two rollers, multiple rollers, multiple sieve plates, unloading device and electric control equipment, roller and roller cooperation feed section and discharge end form inclined screening passage, sieve plate and sieve piece on roller form primary screen gap and secondary screen gap, material is screened and output through different discharge port;Through unloading device, wet sticky fine particle material bonding can be cleaned, since mud scraping stator movable sleeve is installed on main shaft, unloader is connected with mud scraping stator, in the process of roller rotation, mud scraping stator does not rotate with roller, relative movement is generated between mud scraping stator and poking ratchet and between mud scraping stator and sieve piece, so that mud scraping stator promptly cleans up the coal powder adhered to the side of sieve piece and fallen on poking ratchet, ensure the cleanliness of poking ratchet and sieve piece, solve the problem that coal slime wraps poking ratchet, improve production efficiency.

Description

Technical Field

[0001] This invention relates to the field of coal mineral screening technology, and in particular to a composite screen with a rotating screen bar that can automatically remove mud. Background Technology

[0002] With the increasing modernization of coal mine production, the importance of coal particle size classification in the coal production system is becoming more and more prominent. Designing and manufacturing efficient screening equipment that meets production needs to improve the level and efficiency of coal classification is a problem that needs to be solved in the development of fine particle size classification technology.

[0003] A compound screen is a commonly used device for efficient screening of materials such as coal and ore. It mainly consists of screen plates, ratchet wheels, and screen plates. The screen plates and ratchet wheels are arranged alternately to form a primary screen gap, and the screen plates and screen plates form a secondary screen gap. Materials larger than the primary screen gap flow from the top surface of the screen plates to the discharge port under the action of the screen plates. Materials smaller than the primary screen gap fall into the primary screen gap and are then loosened by the screen plate. Materials smaller than the secondary screen gap fall through the secondary screen gap to the bottom of the screen, thus completing the screening of the materials.

[0004] During the material screening process using a composite screen, wet, sticky, fine-grained materials can easily adhere to the screen plates, ratchet, and screen board, forming scale on the surface. In particular, scale formation on the ratchet surface can affect the movement of the elastic rods on the screen board, even causing them to lose their elasticity and reducing the material's loosening effect, thereby reducing the screening efficiency. Summary of the Invention

[0005] This invention provides a composite screen with an automatic mud removal mechanism, which solves the problem that the screening efficiency is easily reduced due to scaling of wet, sticky, fine-particle materials when using composite screens in the prior art.

[0006] This invention provides a composite screen with an automatic mud removal mechanism, comprising:

[0007] The machine body has a feeding hopper at the top and an outlet of the feeding hopper that connects to an internal cavity of the machine body to form a feeding port. A first discharge port is provided on the lower side of the machine body away from the feeding hopper, and multiple second discharge ports are formed at the bottom of the machine body.

[0008] Two rollers, one of which is located below the inlet and the other is located to the side of the first outlet;

[0009] Multiple rollers are located inside the machine body, and the axes of the multiple rollers and the axes of the two rollers are on the same straight line to form an inclined channel from the feed inlet to the first discharge outlet; each roller includes a main shaft, on which multiple screen plates and multiple actuating ratchet wheels are spaced apart, and a primary screen gap is formed between two adjacent screen plates, and the actuating ratchet wheels are located within the primary screen gap;

[0010] Multiple sieve plates, each sieve plate including a sieve rod seat and multiple elastic sieve rods connected to the sieve rod seat, the sieve rod seat being fixed on a sieve plate seat inside the machine body and the sieve rod seat being located between two adjacent rollers, the elastic sieve rods being placed on the actuating ratchet, and a secondary sieve gap being formed between the elastic sieve rods and the sieve plates;

[0011] The unloading device includes an unloader and a scraper stator. The unloader is fixed on an unloader support inside the machine body. The unloader is connected to the scraper stator. The scraper stator is movably mounted on the main shaft and is located between the actuating ratchet and the screen plate.

[0012] According to the present invention, a composite screen with an automatic mud removal mechanism is provided, wherein a spacer is fitted between two adjacent screen plates on the main shaft, and multiple spacers are provided to make the screen plates equally distributed. The ratchet and the mud scraper are fitted on the spacers.

[0013] According to the present invention, a composite screen with an actuated screen rod capable of automatically removing mud is provided, wherein the inner wall of the partition sleeve is provided with an inner keyway, and the inner keyway cooperates with a flat key to fix the partition sleeve and the main shaft for installation; the outer wall of the partition sleeve is provided with an outer keyway, and the outer keyway cooperates with a stop on the inner wall of the actuating ratchet to fix the partition sleeve and the actuating ratchet for installation; the mud scraper stator is movably installed with the partition sleeve.

[0014] According to the present invention, a composite screen with an automatic mud removal mechanism is provided, wherein both ends of the main shaft are fitted with a clamping sleeve and a clamping nut, so as to clamp the screen plate and the spacer on the main shaft by means of the clamping sleeve and the clamping nut at both ends.

[0015] According to the present invention, a composite screen with an actuated screen rod that can automatically remove mud is provided. The mud scraper stator is a ring structure with a shaft hole at the center of the ring structure. The mud scraper stator is movably mounted on the main shaft through the shaft hole. A brake arm and a mud scraper are provided on the outer circumference of the ring structure. The two sides of the mud scraper scrape the end face of the screen plate and the end face of the actuated ratchet respectively during the rotation of the main shaft.

[0016] According to the present invention, a composite screen with an automatic mud removal mechanism is provided, wherein the unloader has an elongated mounting hole, and a connector passes through the mounting hole to fix the unloader to the unloader support; one end of the unloader has a fork groove, so that the end of the unloader forms a fork-shaped structure, and the front end of the fork-shaped structure has a stop, which overlaps the brake arm.

[0017] According to the present invention, a composite screen with an automatic mud removal mechanism is provided, wherein drag-reducing washers are provided between the mud scraper stator and the ratchet wheel, and between the mud scraper stator and the screen plate.

[0018] According to the present invention, a composite screen with a movable screen rod that can automatically remove mud has a side surface of the screen rod seat that is inclined or arc-shaped to form a structure that is wider at the top and narrower at the bottom. A hinge hole is formed on the side surface of the screen rod seat, and a rotating shaft is hinged in the hinge hole. The end of the elastic screen rod is connected to the rotating shaft.

[0019] According to the present invention, a composite screen with an automatic mud removal mechanism is provided, wherein a notch is formed on the upper side of the screen rod seat, and a pressure plate is connected to the upper end face of the screen rod seat by fasteners. The pressure plate covers the notch to form the hinge hole, and the fasteners pass through the pressure plate and the screen rod seat in sequence and are connected to the screen plate seat.

[0020] According to the present invention, a rotary screen with an automatic mud removal mechanism is provided, wherein a torsion spring is fitted on the rotating shaft to reset the rotating shaft.

[0021] The present invention provides an automatic mud-removing composite screen with a rotating screen bar. The screen is constructed by a combination of a drum and a roller, forming an inclined screening channel at the feed section and discharge end. The screen plates on the screen plate and roller form primary and secondary screen gaps, screening materials and outputting them through different discharge ports. The drum has strong impact resistance, evenly distributing materials and preventing clogging. The unloading device can clean up wet, sticky fine particles. Because the mud scraper stator is movable on the main shaft, and the unloader is connected to the mud scraper stator, the mud scraper stator does not rotate with the roller during rotation. Relative movement occurs between the mud scraper stator and the rotating ratchet, and between the mud scraper stator and the screen plates. This allows the mud scraper stator to promptly clean the coal powder adhering to the side of the screen plates and falling onto the rotating ratchet, ensuring the cleanliness of the rotating ratchet and screen plates. This solves the problem of coal mud encapsulating the rotating ratchet and improves production efficiency. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in this invention 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 invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the composite screen with automatic mud removal by a rotating screen rod provided by the present invention.

[0024] Figure 2 yes Figure 1 The left view;

[0025] Figure 3 This is a schematic diagram of the structure of the roller provided by the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the roller provided by the present invention;

[0027] Figure 5 This is a schematic diagram of the mating structure of the roller and the sieve plate provided by the present invention;

[0028] Figure 6 This is a schematic diagram of the sieve plate provided by the present invention;

[0029] Figure 7 yes Figure 6 The left view;

[0030] Figure 8 This is one of the schematic diagrams of the cooperative structure of the roller, screen plate and unloading device provided by the present invention;

[0031] Figure 9 This is the second schematic diagram of the cooperative structure of the roller, screen plate and unloading device provided by the present invention;

[0032] Figure 10 This is a schematic diagram of the spacer provided by the present invention;

[0033] Figure 11 This is a schematic diagram of the ratchet mechanism provided by the present invention;

[0034] Figure 12 This is a schematic diagram of the structure of the mud scraper stator provided by the present invention;

[0035] Figure 13 This is a schematic diagram of the main structure of the unloader provided by the present invention;

[0036] Figure 14 This is a top view of the unloader provided by the present invention.

[0037] Figure label:

[0038] 1. Machine body; 101. Feed hopper; 102. Feed inlet; 103. First discharge outlet; 104. Second discharge outlet; 105. Screen plate seat; 106. Unloader support; 2. Drum; 3. Roller; 301. Main shaft; 302. Screen plate; 303. Actuating ratchet; 3031. Stop head; 304. Primary screen gap; 305. Spacer; 3051. Inner keyway; 3052. Outer keyway; 306. Tightening sleeve; 307. Tightening Nut; 308, drag-reducing washer; 4, screen plate; 401, screen rod seat; 402, elastic screen rod; 403, hinge hole; 404, rotating shaft; 405, pressure plate; 5, secondary screen gap; 6, unloading device; 601, unloader; 6011, mounting hole; 6012, fork groove; 6013, fork-shaped structure; 6014, stop; 602, scraper stator; 6021, shaft hole; 6022, brake arm; 6023, scraper blade. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0040] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention 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 the embodiments of the present invention.

[0041] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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 direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0042] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] The following is combined with Figures 1 to 14 The specific structure of the automatic mud removal composite screen with a rotating screen rod of the present invention is described.

[0045] One embodiment of the present invention provides a composite screen with an actuated screen bar capable of automatically removing mud; see [link to relevant documentation]. Figure 1 and Figure 2As shown, the device includes a machine body 1, two rollers 2, multiple rollers 3, multiple screen plates 4, a discharge device 6, and electrical control equipment. A feed hopper 101 is located at the top of the machine body 1, and the outlet of the feed hopper 101 connects to the internal cavity of the machine body 1 to form a feed inlet 102. A first discharge outlet 103 is located on the lower side of the machine body 1 away from the feed hopper 101, and multiple second discharge outlets 104 are formed at the bottom of the machine body 1. Of the two rollers 2, one roller 2 is located below the feed inlet 102, and the other roller 2 is located to the side of the first discharge outlet 103. Multiple rollers 3 are located inside the machine body 1, and the axes of the multiple rollers 3 and the axes of the two rollers 2 are on the same straight line to form an inclined channel from the feed inlet 102 to the first discharge outlet 103. Each roller 3 includes a main shaft 301, on which multiple screen plates 30 are spaced and fitted. 2. A plurality of ratchet wheels 303 are used to actuate the screen plates 302. A primary screen gap 304 is formed between two adjacent screen plates 302. The ratchet wheels 303 are located within the primary screen gap 304. The screen plate 4 includes a screen rod seat 401 and a plurality of elastic screen rods 402 connected to the screen rod seat 401. The screen rod seat 401 is fixed on the screen plate seat 105 inside the machine body 1 and is located between two adjacent rollers 3. The elastic screen rods 402 are placed on the ratchet wheels 303. A secondary screen gap 5 is formed between the elastic screen rods 402 and the screen plates 302. The unloading device 6 includes an unloader 601 and a scraper stator 602. The unloader 601 is fixed on the unloader support 106 inside the machine body 1. The unloader 601 is connected to the scraper stator 602. The scraper stator 602 is movably mounted on the main shaft 301 and is located between the ratchet wheels 303 and the screen plates 302.

[0046] It is understood that in this embodiment of the automatic mud removal rotary screen, the material enters through the feed hopper 101 of the machine body 1 and then enters the machine body 1 through the feed inlet 102. The roller 2 below the feed inlet 102 has strong impact resistance and has the function of evenly distributing the material, which can prevent the material from getting stuck. The roller 2 below the feed inlet 102 conveys the material to the composite screen surface. Material larger than the first-stage screen gap 304 flows from the top of the screen plate 302 to the first discharge port 103. The roller 2 on the side of the first discharge port 103 ensures that the screened material is smoothly discharged from the first discharge port 103. Material smaller than the first-stage screen gap 304 falls into the screen cavity formed by the first-stage screen gap 304. The material in the screen cavity is continuously loosened by the agitation action of the elastic screen rod 402. Material smaller than the second-stage screen gap 5 is subjected to the triple action of friction, gravity, and misalignment (friction: friction is generated between materials and between materials and screen plate 302, transferring the kinetic energy of screen plate 302 to the material, causing the material to move forward and downward tangentially. Misalignment: due to the high-frequency up-and-down swaying motion of the elastic screen rod 402, the elastic screen rod 402 quickly sweeps over the material smaller than the second-stage screen gap 5 due to the impulse effect, and the material falls below the elastic screen rod 402). Material smaller than the secondary screen opening 5 falls rapidly towards the second discharge port 104 under the combined effects of friction, gravity, and misalignment. Material smaller than the primary screen opening 304 but larger than the secondary screen opening 5 flows along the elastic screen rod 402 towards the first discharge port 103. Through this process, material larger than the secondary screen opening 5 flows to the same first discharge port 103, becoming the screened coarse product, while material smaller than the secondary screen opening 5 flows to the second discharge port 104, becoming the screened fine product, thus achieving the purpose of material classification.

[0047] During the material grading process described above, wet and sticky fine particles easily adhere to the screen plate 302, the ratchet 303, and the screen plate 4, forming scale on the surface and affecting the efficiency of the screening operation. In this embodiment, the wet and sticky fine particles can be cleaned by the unloading device 6. Specifically, since the scraper stator 602 is movably mounted on the main shaft 301, and the unloader 601 is connected to the scraper stator 602, the scraper stator 602 does not rotate with the main shaft 301 during the rotation of the main shaft 301. Relative movement occurs between the scraper stator 602 and the ratchet 303, and between the scraper stator 602 and the screen plate 302. Due to this relative movement, the scraper stator 602 can automatically clean the coal powder adhering to the side of the screen plate 302 and falling on the ratchet 303 in a timely manner during the movement of the equipment, ensuring the cleanliness of the ratchet 303 and the screen plate 302, solving the problem of coal sludge covering the ratchet 303, and improving production efficiency.

[0048] For some specific examples, see Figure 2 As shown, one roller 2 is installed at each of the first discharge ports 103 and 103. (See also...) Figure 3 As shown, roller 2 consists of a cylindrical body, a long shaft head, and a short shaft head, etc. The cylindrical body is cylindrical. Roller 2 is mounted on the machine body 1 by bearing seats and connected to the reducer via a coupling. The reducer is connected to the machine body 1 via a reducer support. Roller 2 at the first discharge port 103 has strong impact resistance and evenly distributes materials; roller 2 at the first discharge port 103 ensures smooth discharge and prevents jamming and clogging. Roller 3 is mounted on the machine body 1 by bearing seats and connected to the reducer via a coupling. The reducer is connected to the machine body 1 via a reducer support. The length and number of rollers 3 are the main factors determining the output. Longer rollers have higher output, shorter rollers have lower output, more rollers have higher output, and fewer rollers have lower output.

[0049] In some specific embodiments of the composite screen with automatically removing mud using a rotating screen rod according to the present invention, see [link to specific embodiments]. Figure 4 As shown, a spacer 305 is fitted between two adjacent screen plates 302 on the main shaft 301. The screen plates 302 and spacers 305 are sequentially and alternately assembled on the main shaft 301. The screen plates 302 and spacers 305 are connected to the main shaft 301 by a flat key, allowing the screen plates 302 and spacers 305 to rotate with the main shaft 301. The spacers 305 divide the screen plates 302 into equidistant first-stage screen gaps 304. Both ends of the main shaft 301 are fitted with clamping sleeves 306 and clamping nuts 307 to clamp the screen plates 302 and spacers 305 onto the main shaft 301.

[0050] The ratchet 303 and the scraper stator 602 are mounted on the spacer 305. See also Figure 10 As shown, the spacer 305 is cylindrical and has a shaft hole. An inner keyway 3051 is provided on the inner wall of the spacer 305, which engages with a flat key to fix the spacer 305 to the main shaft 301. An outer keyway 3052 is provided on the outer wall of the spacer 305, which engages with a stop 3031 on the inner wall of the ratchet 303 to fix the spacer 305 to the ratchet 303. Specifically, the ratchet 303 is mounted on the spacer 305, with one ratchet 303 mounted on each spacer 305. Figure 11 As shown, the stop 3031 of the ratchet 303 is inserted into the outer keyway 3052 of the spacer 305, causing the ratchet 303 to rotate with the main shaft 301. Since the ratchet 303 rotates with the main shaft 301, when the root circle of the teeth on the ratchet 303 is facing the elastic screen rod 402, the elastic screen rod 402 falls to the low position. When the actuating teeth on the ratchet 303 are facing the elastic screen rod 402, the elastic screen rod 402 is lifted to the high position. This cycle repeats, causing the elastic screen rod 402 to make up-and-down bouncing movements, which loosens and disperses the material.

[0051] Combination Figure 8 and Figure 9As shown, the scraper stator 602 is movably fitted with the spacer 305. Specifically, the scraper stator 602 is fitted onto the spacer 305 and located on both sides of the actuating ratchet 303. The scraper stator 602 is connected to the unloader 601, preventing it from rotating. Since the scraper stator 602 does not rotate with the main shaft 301, relative movement occurs between the scraper stator 602 and the screen plate 302, and between the scraper stator 602 and the actuating ratchet 303. This relative movement allows the scraper stator 602 to promptly remove coal dust adhering to the side of the screen plate 302 and falling onto the actuating ratchet 303, solving the problem of coal sludge covering the actuating ratchet 303. The scraper stator 602 serves two purposes: firstly, it removes coal sludge, and secondly, it restricts the left-right swing of the elastic screen rod 402.

[0052] See some examples. Figure 12 As shown, the scraper stator 602 has an annular structure with a shaft hole 6021 at its center. The scraper stator 602 is movably mounted on the main shaft 301 through the shaft hole 6021. A brake arm 6022 and a scraper plate 6023 are provided on the outer circumference of the annular structure. The brake arm 6022 is connected to the unloader 601. During the rotation of the main shaft 301, the two sides of the scraper plate 6023 scrape mud from the end face of the screen plate 302 and the end face of the ratchet 303, respectively. Figure 13 and Figure 14 As shown, the unloader 601 has an elongated mounting hole 6011, through which a connector passes to fix the unloader 601 to the unloader support 106; one end of the unloader 601 has a fork groove 6012, so that the end of the unloader 601 forms a fork-shaped structure 6013, and the front end of the fork-shaped structure 6013 has a stop 6014, which overlaps the brake arm 6022. It can be understood that the scraper stator 602 will not touch the unloader when it is not in contact with the unloader. Before step 601, that is, before the brake arm 6022 of the scraper stator 602 overlaps with the stop 6014 of the unloader 601, the scraper stator 602 will rotate with the main shaft 301. When the brake arm 6022 of the scraper stator 602 rotates to the stop 6014 of the unloader 601 during the rotation, the brake arm 6022 and the stop 6014 overlap, and the unloader 601 restricts the scraper stator 602 from continuing to rotate. The scraper stator 602 is fixed at this time, and the scraping operation begins.

[0053] Combination Figure 8 and Figure 9As shown, the ratchet 303 has a shaft hole with a stop 3031 on it and actuating teeth on its outer circumference. The tooth height determines the actuation amplitude of the elastic screen rod 402, and the number of teeth determines the actuation frequency of the elastic screen rod 402. The tooth height is limited to not affecting the flow of coarse particles, and the number of teeth is limited to the point where the elastic screen rod 402 is closest to the tooth root circle when it moves downward. The scraper stator 602 has a shaft hole 6021 and a brake arm 6022 and a scraper plate 6023 on its outer circumference. The unloader 601 is installed on the unloader support 106 on the machine body 1. The unloader 601 unloads the material falling between the two screen plates 302 to the underside of the screen and also blocks the scraper stator 602 to prevent it from rotating. Specifically, the scraper stator 602 is fitted onto the spacer 305 and located on both sides of the actuating ratchet 303. The brake arm 6022 is engaged with the stop 6014 of the unloader 601, preventing the scraper stator 602 from rotating. Since the scraper stator 602 does not rotate with the main shaft, relative movement occurs between the scraper stator 602 and the screen plate 302, and between the scraper stator 602 and the actuating ratchet 303. This relative movement allows the scraper plate 6023 to promptly remove the coal dust adhering to the side of the screen plate 302 and falling onto the actuating ratchet 303, thus solving the problem of coal sludge enveloping the actuating ratchet 303.

[0054] Furthermore, drag-reducing washers 308 are provided between the scraper stator 602 and the actuating ratchet 303, and between the scraper stator 602 and the screen plate 302. The drag-reducing washers 308 are circular with a circular inner hole, and the material strength should meet the usage requirements while minimizing the coefficient of friction. The drag-reducing washers 308 are installed between the scraper stator 602 and the actuating ratchet 303, and between the scraper stator 602 and the screen plate 302, to reduce the frictional resistance between the scraper stator 602 and the actuating ratchet 303, and between the scraper stator 602 and the screen plate 302.

[0055] In traditional composite screen structures, the elastic rod screen plate consists of an elastic rod and a connecting plate, with the elastic rod and connecting plate being fixedly connected. The elastic rod is prone to breakage and has a very short service life. Analysis suggests that this problem is caused by strong fatigue at the root of the elastic rod. Because the elastic rod and connecting plate are fixedly connected, when the elastic rod is actuated at a certain frequency by ratchet teeth, strong fatigue occurs at the root of the elastic rod. When the fatigue exceeds the fatigue limit of the elastic rod material, the elastic rod will break. In the structure of the automatic mud-removing actuated screen rod composite screen of this invention, the elastic screen rod 402 and the screen rod seat 401 are connected by a hinge. In some specific embodiments, the side of the screen rod seat 401 is a slope or arc surface to form a structure that is wider at the top and narrower at the bottom. A hinge hole 403 is formed on the side of the screen rod seat 401, and a rotating shaft 404 is hinged within the hinge hole 403. The end of the elastic screen rod 402 is connected to the rotating shaft 404. Specifically, combined with... Figure 5 and Figure 6As shown, the screen plates 4 are sequentially installed onto the screen plate seats 105 on the machine body 1. Each elastic screen rod 402 must fall precisely between the two scraper stators 602, ensuring that the elastic screen rod 402 and the screen plates 302 on both sides form equidistant secondary screen gaps 5. Thus, the elastic screen rods 402 and screen plates 302 are orderly combined to form a composite screen surface. Because the connection between the elastic screen rod 402 and the screen rod seat 401 is hinged, the connection part of the elastic screen rod 402 will not experience strong fatigue when it is moved, and therefore the elastic screen rod 402 will not break due to exceeding its fatigue limit, solving the problem of easy breakage of the elastic screen rod 402.

[0056] Specifically, see Figure 7 As shown, taking the working state as an example ( Figure 7 (The screen rod seat 401 is in its working state when rotated 90° counterclockwise). A notch is formed on the upper side of the screen rod seat 401. A pressure plate 405 is connected to the upper end face of the screen rod seat 401 via fasteners. The pressure plate 405 covers the notch, forming a hinge hole 403. Fasteners (bolts) pass through the pressure plate 405 and the screen rod seat 401 in sequence and are connected to the screen plate seat 105. Furthermore, in some examples, a torsion spring is fitted onto the rotating shaft 404 to reset the rotating shaft 404. In this example, the elastic screen rod 402 is initially positioned at half the tooth height of the outer ring actuating teeth of the ratchet 303. As the ratchet 303 rotates, when the actuating teeth of the outer ring of the ratchet 303 contact the elastic screen rod 402, they exert an upward pushing force on the elastic screen rod 402, pushing it to its highest position. When the actuating teeth of the outer ring of the ratchet 303 disengage from the elastic screen rod 402, under its own weight and the action of the torsion spring, the elastic screen rod 402 moves downward, returning to its initial position. Under its own weight and inertia, the elastic screen rod 402 continues to move downward. When it reaches the root circle of the tooth on the ratchet 303, it reaches the limit of downward movement and begins to return to the initial position under the action of the torsion spring. Then, as the next tooth on the outer ring of the ratchet 303 moves, it starts the next round of movement. This cycle repeats, making the elastic screen rod 402 perform a complete up-and-down swaying motion, which loosens and disperses the material. Compared with the traditional upward half-cycle swaying motion, the up-and-down swaying in this example is more complete and the stirring effect is better.

[0057] In summary, due to the structure of the automatic mud-removing composite screen with actuated screen rods of the present invention, the drum 2 has strong impact resistance and functions to evenly distribute materials and prevent clogging; the elastic screen rod 402 and the screen rod seat 401 are hinged, therefore, when the elastic screen rod 402 moves up and down, the screen rod connection part will not be easily broken due to strong fatigue, thus reducing screen rod wear. Furthermore, the up and down movement of the elastic screen rod 402 under the action of the actuated ratchet 303 produces a misalignment effect, which greatly improves the screening efficiency of fine particles, thus greatly improving production efficiency. Because the present invention incorporates a discharge device 6, the scraper stator 602 of which is installed between the screen plate 302 and the ratchet 303, and is held in place by the discharger 601 to prevent the scraper stator 602 from rotating with the main shaft, relative movement occurs between the scraper stator 602 and the ratchet 303, and between the scraper stator 602 and the screen plate 302. This relative movement allows the scraper stator 602 to promptly remove coal dust adhering to the side of the screen plate 302 and falling onto the ratchet 303, solving the problem of coal dust encapsulating the ratchet 303 and improving production efficiency. The installation of friction-reducing washers between the scraper stator 602 and the ratchet 303, and between the scraper stator 602 and the screen plate 302, reduces frictional resistance and power consumption.

[0058] The following describes the beneficial effects of the automatic mud-removing composite screen with a movable screen rod of the present invention, based on specific implementation results:

[0059] This embodiment uses the automatic mud removal composite screen with a movable screen rod of the present invention at the Kangying Coal Yard in Gaoping City, Shanxi Province, installed at "Gaoping Xinding Logistics Co., Ltd."

[0060] The economic indicators of the traditional composite screen and the automatic mud-removing rotary screen of this invention are shown in the table below.

[0061] Table 1: Economic Indicators of Traditional Composite Screens

[0062] anthracite 100-0 9％ 150t / h >80％ 0.73 kW·H / ton of coal

[0063] Table 2: Economic Indicators of the Automatic Mud Removal Composite Screen of the Invention

[0064] anthracite 100-0 9％ 400t / h >80％ 0.19 kW·H / ton of coal

[0065] Comparing the two tables above, it is clear that the automatic mud-removing rotary screen of this invention significantly increases output and significantly reduces power consumption compared to traditional composite screens. Furthermore, regarding screen plate wear statistics, traditional composite screens experience daily damage. In contrast, the automatic mud-removing rotary screen of this invention did not suffer damage to a single screen plate or require replacement of a single screen rod within a year of use, significantly reducing screen plate wear.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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 of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A composite screen with an automatic mud-removing mechanism, characterized in that, include: The machine body (1) has a feeding hopper (101) at the top and the outlet of the feeding hopper (101) is connected to the internal cavity of the machine body (1) to form the feeding port (102) of the machine body (1); a first discharge port (103) is provided on the lower part of the side of the machine body (1) away from the feeding hopper (101), and a plurality of second discharge ports (104) are formed at the bottom of the machine body (1). Two rollers (2), one of which is located below the feed inlet (102) and the other is located to the side of the first discharge outlet (103); Multiple rollers (3) are located inside the machine body (1), and the axes of the multiple rollers (3) and the axes of the two rollers (2) are on the same straight line to form an inclined channel from the feed inlet (102) to the first discharge outlet (103); the rollers (3) include a main shaft (301), on which multiple screen plates (302) and multiple ratchet wheels (303) are spaced apart, and a primary screen gap (304) is formed between two adjacent screen plates (302), and the ratchet wheel (303) is located inside the primary screen gap (304); Multiple sieve plates (4), each sieve plate (4) includes a sieve rod seat (401) and multiple elastic sieve rods (402) connected to the sieve rod seat (401). The sieve rod seat (401) is fixed on a sieve plate seat (105) inside the machine body (1), and the sieve rod seat (401) is located between two adjacent rollers (3). The elastic sieve rods (402) are placed on the ratchet wheel (303), and a secondary sieve gap (5) is formed between the elastic sieve rods (402) and the sieve plate (302). The unloading device (6) includes an unloader (601) and a scraper stator (602). The unloader (601) is fixed on the unloader support (106) inside the machine body (1). The unloader (601) is connected to the scraper stator (602). The scraper stator (602) is movably mounted on the main shaft (301) and is located between the ratchet (303) and the screen plate (302). The scraper stator (602) is an annular structure with a shaft hole (6021) at its center. The scraper stator (602) is movably mounted on the main shaft (301) through the shaft hole (6021). A brake arm (6022) and a scraper plate (6023) are provided on the outer circumference of the annular structure. The brake arm (6022) is connected to the unloader (601). During the rotation of the main shaft (301), the two sides of the scraper plate (6023) respectively contact the end face of the screen plate (302) and the ratchet wheel (303). The end face of the unloader (601) is scraped to remove mud; the unloader (601) is provided with an elongated mounting hole (6011) so that the unloader (601) can be fixed to the unloader support (106) by a connector passing through the mounting hole (6011); one end of the unloader (601) is provided with a fork groove (6012) so that the end of the unloader (601) forms a fork-shaped structure (6013), and the front end of the fork-shaped structure (6013) is provided with a stop (6014), and the stop (6014) overlaps the brake arm (6022); A drag-reducing washer (308) is provided between the mud scraper stator (602) and the ratchet (303) as well as between the mud scraper stator (602) and the sieve plate (302).

2. The composite screen with automatic mud removal by a movable screen rod according to claim 1, characterized in that, A spacer (305) is fitted between two adjacent screen plates (302) on the main shaft (301), and multiple spacers (305) make the screen plates (302) equally distributed. The ratchet (303) and the mud scraper stator (602) are fitted on the spacer (305).

3. The composite screen with automatic mud removal capability according to claim 2, characterized in that, The inner wall of the spacer (305) is provided with an inner keyway (3051), which cooperates with a flat key to fix the spacer (305) and the main shaft (301) in a fixed fit; the outer wall of the spacer (305) is provided with an outer keyway (3052), which cooperates with the stop (3031) on the inner wall of the ratchet (303) to fix the spacer (305) and the ratchet (303) in a fixed fit; the mud scraper stator (602) is movably fitted with the spacer (305).

4. The composite screen with automatic mud removal by actuating screen rod according to claim 2, characterized in that, Both ends of the main shaft (301) are fitted with a clamping sleeve (306) and a clamping nut (307) to clamp the screen plate (302) and the spacer (305) onto the main shaft (301) through the clamping sleeve (306) and the clamping nut (307) at both ends.

5. The composite screen with automatic mud removal capability according to any one of claims 1 to 4, characterized in that, The side of the screen rod seat (401) is a sloping or arc surface to form a structure that is wider at the top and narrower at the bottom. The side of the screen rod seat (401) has a hinge hole (403), and a rotating shaft (404) is hinged in the hinge hole (403). The end of the elastic screen rod (402) is connected to the rotating shaft (404).

6. The composite screen with automatic mud removal capability according to claim 5, characterized in that, A notch is formed on the upper side of the screen rod seat (401). A pressure plate (405) is connected to the upper end face of the screen rod seat (401) by a fastener. The pressure plate (405) covers the notch to form the hinge hole (403). The fastener passes through the pressure plate (405) and the screen rod seat (401) in sequence and is connected to the screen plate seat (105).

7. The composite screen with automatic mud removal via a rotating screen rod according to claim 5, characterized in that, A torsion spring is fitted on the rotating shaft (404) to reset the rotating shaft (404) by means of the torsion spring.

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