A special tooth device for balling disc to fish large balls

Abstract

The utility model discloses a kind of special harrow tooth devices of balling disc fishing big ball, including setting on lifting mechanism, fishing big ball mechanism and rotating mechanism of rack;Rack is the frame type structure with opening in front side, lifting mechanism includes the lifting support of inserting from the local part of rack opening side and setting in rack, it is slidably connected with rack and drives lifting by lifting motor;Transmission mechanism includes transmission motor and chain transmission assembly on inverted L-shaped chassis, chassis is rotatably connected with lifting mechanism, fishing big ball mechanism includes shearing harrow and salvage harrow, salvage harrow is connected with transmission motor by chain transmission assembly, to drive salvage harrow reciprocating rotation fishing big ball and / or relative motion broken big ball with shearing harrow;The device is easy to operate, practical, can be applicable to a variety of production process conditions, not only increase ball disc picking area, effectively pick in the initial stage of big ball formation, simultaneously controllable selection big ball roll direction, avoid the formation of super big ball, improve qualified ball yield.

Description

Technical Field

[0001] This utility model relates to the fields of iron and steel, metallurgy, and mining technology, and in particular to a special rake tooth device for scooping large balls from a ball-making disc. Background Technology

[0002] In disc pelletizing production, during the pelletizing process within the disc, foreign objects or large pieces cannot be promptly expelled from the disc during rolling. Over time, these adhere to the outer surface of the disc, gradually growing into large or extra-large pellets. These pellets then swirl and linger in the material flow above the pelletizing area. The formation of these large pellets negatively impacts the quality of the finished pellets, requiring timely removal by workers using tools. However, due to the considerable distance between the worker's platform and the disc, the disc's rapid rotation, and the unpredictable position of the large pellets, retrieving them presents a challenge. Furthermore, retrieving large pellets is only one part of the workers' tasks, and the unpredictable formation time of these pellets makes timely cleaning impossible. Therefore, employing specialized equipment for retrieving large pellets from the disc is essential.

[0003] Current equipment for retrieving large balls either employs a scooping method (lifting or scraping the large balls from the ball tray) or a crushing method (breaking the large balls within the ball tray). Both methods have limitations and cannot adapt to all working conditions. This special rake tooth for retrieving large balls perfectly combines the two methods through opposite rotation, meeting the needs of different customers; it greatly improves the efficiency of retrieving large balls, reduces the labor intensity of workers, and features a simple structure, low cost, easy maintenance, economic durability, and long service life, offering excellent economic benefits. Utility Model Content

[0004] The purpose of this invention is to provide a special rake tooth device for catching large balls in a ball-forming plate to solve the above-mentioned technical problems, so as to improve the efficiency of catching large balls and effectively curb the formation of super-large balls.

[0005] Therefore, the technical solution of this utility model is as follows:

[0006] A special rake tooth device for scooping large balls from a ball-forming plate includes a lifting mechanism, a large ball-scooping mechanism, and a rotating mechanism mounted on a frame; wherein...

[0007] The frame is a frame structure with an opening on the front side, and a first mounting base is provided at the top front end. The lifting mechanism includes a lifting bracket partially inserted into the frame from the opening side, on which a lead screw is vertically fixed. The lead screw thread passes through the first mounting base to the top of the frame, and its lead screw nut is driven and connected to a lifting motor fixed at the top of the frame through a transmission mechanism. Two first connecting mechanisms and two second connecting mechanisms are symmetrically arranged at the bottom front end and rear end of the lifting bracket, respectively. The two first connecting mechanisms are fixedly connected to the lifting bracket through two connecting longitudinal shafts, so that their installation height is lower than the two second connecting mechanisms directly fixed to the lifting bracket. The two first connecting mechanisms and the two second connecting mechanisms are fixedly connected to each other through at least one connecting shaft. Two lifting plates are symmetrically sleeved on the connecting shaft between the two second connecting mechanisms. Multiple through holes are spaced apart from top to bottom on the surface of the lifting plates.

[0008] The transmission mechanism includes an inverted L-shaped base frame, with the middle of the base frame rotatably mounted on the connecting shaft of the two first connecting mechanisms. The rear side of the base frame is movably inserted into the through holes of the two lifting plates through the connecting mechanisms. A transmission motor is provided on the top side of the base frame, and a chain drive assembly is provided on its side along the length of the base frame. The transmission motor is connected to the drive sprocket of the chain drive assembly.

[0009] The large ball retrieval mechanism includes a bracket fixed obliquely forward on the front side of the base frame. The shearing mechanism includes a shearing seat rotatably mounted on the bracket in a horizontal state. Multiple shearing teeth are obliquely arranged and spaced apart and fixed on the shearing seat to form a shearing rake. The top side of each shearing tooth is movably sleeved on a screw fixed horizontally to the bracket and connected to the bracket by a tension spring. The retrieval mechanism is located below the shearing mechanism and includes a main rotating body. The two ends of the main rotating body are rotatably mounted at the front end of the base frame and are driven and connected to the driven sprocket of the chain drive assembly. Multiple rake teeth are spaced apart and fixed on the main rotating body to form a retrieval rake. Each rake tooth and each shearing tooth are arranged in an alternating manner to form a shearing action through relative motion.

[0010] Furthermore, the frame includes two front longitudinal support beams, two middle longitudinal support beams, and two rear longitudinal support beams spaced apart from front to back. The top sides of each longitudinal support beam are fixedly connected as a whole by horizontally arranged connecting beams. Each adjacent front longitudinal support beam is reinforced with a horizontally arranged and / or obliquely arranged connecting beam, as are the middle longitudinal support beams and the rear longitudinal support beams. The two front longitudinal support beams and the two middle longitudinal support beams are symmetrically provided with track grooves on their opposite side walls to form a first slide and a second slide, respectively.

[0011] Furthermore, at least one first grooved wheel is symmetrically arranged on the outer side of the two first connecting mechanisms, so that the two are slidably connected in the first slide rail through the first grooved wheel; at least one second grooved wheel is symmetrically arranged on the outer side of the two second connecting mechanisms, so that the two are slidably connected in the first slide rail through the second grooved wheel.

[0012] Furthermore, two first limiting blocks and two second limiting blocks are symmetrically fixed in the first and second slides respectively to form a second mechanical hard limiting assembly and limit the descent stroke of the lifting mechanism.

[0013] Furthermore, the shearing tooth is a straight tooth; the rake tooth is composed of two zigzag teeth with obtuse angles and fixedly connected in opposite directions, so that the rake teeth are arranged obliquely with their front and rear angles facing upwards, and the gap between adjacent rake teeth is smaller than the diameter of the large ball.

[0014] Furthermore, the special rake tooth device for catching large balls in the ball-making tray also includes a winch mechanism consisting of a winch and a pulley, which are respectively fixed to the rear and front sides of the second mounting base on the top side of the frame; wherein, a steel wire rope is wound on the winch, and the end of the steel wire rope passes around the pulley and is connected to a hook; correspondingly, a lifting ring is provided on the side wall of the bracket near the winch mechanism, which is detachably connected to the hook to adjust the tilt angle of the large ball catching mechanism and the base frame.

[0015] Furthermore, the special rake tooth device for catching large balls in the ball-forming plate also includes a detection mechanism, which includes:

[0016] The detection device for the large ball retrieval mechanism includes a first sensor; the first detector of the first sensor is fixed on one side of the outer wall of the front end of the base frame, and its first sensing plate is fixed on the end face of the main rotating body where the sprocket is not installed, and the setting position satisfies the following: when the rear end of the retrieval rake of the large ball retrieval mechanism is set horizontally, the first sensor and the first sensing plate are aligned and a first sensing signal is emitted.

[0017] A foreign object detection mechanism includes a second sensor; the second sensor's second sensor is fixed at one end face of the shearing seat, and its second detection plate is fixed on the bracket, and the setting position satisfies that: when the shearing rake drives the shearing seat to flip downward, the second sensor plate can be aligned with the second detector and emit a second sensing signal.

[0018] The lifting mechanism position detection mechanism includes a sensor bracket and a third sensor vertically mounted on one side of the frame; the third sensor has a third detector and four third sensing plates, which are spaced apart from top to bottom on the sensor bracket; two third sensing plates located at both ends of the sensor bracket are respectively positioned at the upper limit position and the lower limit position of the lifting mechanism, and two third sensing plates located in the middle of the sensor bracket are respectively positioned at the lifting working position and the lowering working position of the lifting mechanism; the third detector is mounted on the base frame and can be aligned with each of the third sensing plates during the lifting and lowering movement of the base frame.

[0019] Furthermore, the special rake tooth device for catching large balls using the ball-making disc also includes a control device for controlling the working state of the lifting mechanism and the rotating mechanism; wherein, the control device is electrically connected to the lifting motor to control the working state of the lifting motor; the control device is electrically connected to the drive motor to control the working state of the drive motor; the control device is also electrically connected to the detectors of the first sensor, the second sensor and the third sensor respectively, so as to collect sensor signals to assist in the resetting of the catching rake, timely detection of foreign objects, and control of the lifting and lowering of the lifting mechanism.

[0020] Furthermore, a connecting beam is horizontally installed at the bottom end of the two front longitudinal support beams to form the first mechanical limiting component for limiting the downward flipping of the retrieval rake.

[0021] Furthermore, in the transmission mechanism, multiple counterweight plates are installed on the vertical frame at the rear end of the base frame.

[0022] Furthermore, two lifting rings are symmetrically arranged on the first mounting base, and correspondingly, two lifting rings are symmetrically arranged on the top surface of the bracket. The two rings are connected to the two lifting rings on the first mounting base by a safety chain. Two lifting rings are symmetrically arranged at the two top corners of the top rear end of the frame, which, together with the two lifting rings symmetrically arranged on the first mounting base, are used for hoisting the device.

[0023] Compared with existing technologies, this special rake tooth device for retrieval of large balls from a ball-forming tray is simple to operate and practical, and can be applied to various production process conditions. It not only increases the picking area of ​​the ball-retrieving tray, effectively picking up large balls in the initial stage of their formation, but also allows for controllable selection of the rolling trajectory of large balls, so that the large balls are either rolled out quickly after being picked up or broken immediately after being retrieved, effectively preventing the formation of oversized balls and increasing the output of qualified balls. In addition, in the design of the motion mechanism, it adopts an electric lifting mechanism and is correspondingly supplemented with limit sensing devices for different position states, making the ball-retrieving action of the ball-retrieving tray reliable and efficient, and effectively reducing the difficulty of operation for personnel. Attached Figure Description

[0024] Figure 1 This is a side view of the special rake tooth device for scooping large balls from the ball-making tray in an embodiment of this utility model;

[0025] Figure 2 This is a schematic diagram of the frame of the special rake tooth device for scooping large balls from the ball-making tray in an embodiment of this utility model;

[0026] Figure 3 This is a schematic diagram of the lifting mechanism of the special rake tooth device for scooping large balls in the ball-making tray in an embodiment of this utility model;

[0027] Figure 4 This is a schematic diagram of the large ball retrieval mechanism of the special rake tooth device for retrieval of large balls in the ball-making disc embodiment of this utility model;

[0028] Figure 5 This is a schematic diagram of the transmission mechanism of the special rake tooth device for scooping large balls in the ball-making disc in an embodiment of this utility model;

[0029] Figure 6 This is a schematic diagram of the assembly structure of the large ball scooping mechanism and the transmission mechanism of the special rake tooth device for scooping large balls in the ball-making disc in an embodiment of this utility model.

[0030] Figure 7 This is a schematic diagram of the winch mechanism of the special rake tooth device for scooping large balls from the ball-making disc in an embodiment of this utility model;

[0031] Figure 8 This is a schematic diagram of the detection mechanism of the special rake tooth device for scooping large balls in the ball-making tray in an embodiment of this utility model;

[0032] Figure 9 This is an isometric view of the special rake tooth device for scooping large balls from the ball-making plate in an embodiment of this utility model. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the following embodiments are not intended to limit the present invention in any way. For ease of description, in practical applications, the side of the device closer to the pelletizing plate is defined as front in the direction, and correspondingly, the side farther from the pelletizing plate is defined as rear in the direction.

[0034] See Figure 1 and Figure 9 The special rake tooth device for scooping large balls from the ball-making plate includes a frame 1, a lifting mechanism 2, a large ball scooping mechanism 3, a rotating mechanism 4, a winch mechanism 5, and a detection mechanism 6.

[0035] See Figure 2The frame 1 is a frame structure with an opening on the front side. Specifically, the frame 1 includes three pairs of longitudinal support beams spaced apart from front to back: a first longitudinal support beam 1-1 and a second longitudinal support beam 1-2, a fifth longitudinal support beam 1-5 and a third longitudinal support beam 1-3, a sixth longitudinal support beam 1-6 and a fourth longitudinal support beam 1-4, and the two longitudinal support beams in each longitudinal support beam group are arranged symmetrically from left to right. The top ends of the first longitudinal support beam 1-1 and the second longitudinal support beam 1-2 are fixedly connected by a horizontally arranged first connecting beam 1-7, and their bottom sides are detachably fixedly connected by a horizontally arranged twelfth connecting beam 1-24, so as to increase the strength of the frame structure and form a first mechanical limiting component.

[0036] The top ends of the fifth longitudinal support beam 1-5 and the third longitudinal support beam 1-3 are fixedly connected by a horizontally arranged second connecting beam 1-8. The top ends of the sixth longitudinal support beam 1-6 and the fourth longitudinal support beam 1-4 are fixedly connected by a horizontally arranged third connecting beam 1-9. The top ends of the first longitudinal support beam 1-1, the fifth longitudinal support beam 1-5, and the sixth longitudinal support beam 1-6 are fixedly connected by an eighth connecting beam 1-20. The top ends of the second longitudinal support beam 1-2, the third longitudinal support beam 1-3, and the fourth longitudinal support beam 1-4 are fixedly connected by an eleventh connecting beam 1-23 to form the top frame of the frame structure. Preferably, by horizontally fixing the third mounting base 1-19 on the top surface of the connection end between the third connecting beam 1-9 and the eighth connecting beam 1-20, and on the top surface of the connection end between the eleventh connecting beam 1-23 and the eighth connecting beam 1-20, respectively, the strength of the frame structure is increased, and it is also used for threaded connection of the lifting ring 1-25, so that the frame 1 is connected to the chain drive assembly through a safety chain.

[0037] The middle sections of the first longitudinal support beam 1-1 and the fifth longitudinal support beam 1-5, and the middle sections of the fifth longitudinal support beam 1-5 and the sixth longitudinal support beam 1-6, are fixedly connected by horizontally arranged ninth connecting beam 1-21 and sixth connecting beam 1-12, respectively. The middle sections of the second longitudinal support beam 1-2 and the third longitudinal support beam 1-3, and the middle sections of the third longitudinal support beam 1-3 and the fourth longitudinal support beam 1-4, are fixedly connected by horizontally arranged tenth connecting beam 1-21 and fifth connecting beam 1-11, respectively. The first longitudinal support beam 1-1 and the second longitudinal support beam 1-2 are constructed using U-shaped channel steel. The first slide is formed by the two longitudinal support beams 1-5 and 1-3, which are U-shaped channel steels and are arranged with their openings facing each other. The second slide is formed by the two longitudinal support beams 1-5 and 1-3, which are arranged with their openings facing each other. This connection method will not damage the structure of the slide. The first and second slides are used to slide with the lifting mechanism as guide structures. The two slides are also symmetrically arranged with two first limit blocks and two second limit blocks 1-27 in the slides to form a second mechanical hard limit assembly, which is used to limit the descent stroke of the lifting mechanism 2. Specifically, the limit blocks can be polyurethane blocks.

[0038] The middle and bottom ends of the sixth longitudinal support beam 1-6 and the fourth longitudinal support beam 1-4 are fixedly connected by the horizontally arranged fourth connecting beam 1-10 and seventh connecting beam 1-13, respectively. The bottom side of the second longitudinal support beam 1-2 is fixedly connected to the bottom ends of the third longitudinal support beam 1-3 and the fourth longitudinal support beam 1-4 by the first oblique support beam 1-14. The bottom side of the first longitudinal support beam 1-1 is fixedly connected to the bottom ends of the fifth longitudinal support beam 1-5 and the sixth longitudinal support beam 1-6 by the second oblique support beam 1-16. At the same time, the first oblique support beam 1-14 and the second oblique support beam 1-16 are fixedly connected by the transverse fixing beam 1-15 to further enhance the structural strength of the frame structure of the frame 1.

[0039] Two short connecting beams are vertically fixed between the first connecting beam 1-7 and the second connecting beam 1-8, so that the first mounting base 1-17 is fixed in the center of the top side of the first connecting beam 1-7 for movable connection with the lifting mechanism; two lifting rings 1-25 are also symmetrically arranged and threadedly connected on the front side of the first mounting base 1-17 for cooperation with the two lifting rings 1-25 on the third mounting base 1-19 to facilitate the movement of the device; a second mounting base 1-18 is fixed at one end of the first connecting beam 1-7 and the second connecting beam 1-8 for setting the winch mechanism 5; wherein, the first mounting base 1-17 and the second mounting base 1-18 are both horizontally set plates.

[0040] In practical applications, the frame 1 is welded or detachably fixed to the maintenance platform of the pelletizing plate by the fourth longitudinal support beam 1-4, the sixth longitudinal support beam 1-6, the third connecting beam 1-9, the fourth connecting beam 1-10 and the seventh connecting beam 1-13.

[0041] See Figure 3 The lifting mechanism 2 includes a lifting bracket 2-2, which is inserted into the frame 1 through the opening side and positioned below its top frame. A lifting motor 2-1 is fixed to the top of the frame 1, with its output shaft facing forward and fitted with a gear. A lead screw 2-7 is provided adjacent to the lifting motor 2-1, with its lead screw thread vertically passing through an opening on the first mounting base 1-17 and fixedly connected to the lifting bracket 2-2 via a flange fixed to its bottom end. The lead screw nut of the lead screw 2-7 is located above the first mounting base 1-17 and is connected to the gear on the output shaft of the lifting motor 2-1 via a vertical transmission mechanism, forming a transmission mechanism. This allows the lifting motor 2-1 to control the rotation of the lead screw nut, driving the lead screw thread to move the lifting bracket 2-2 in a lifting motion. Preferably, a limiting mechanism is also provided on the top side of the lead screw thread to prevent excessive descent. The vertical transmission mechanism is fixed to the first mounting base 1-17.

[0042] Two first connecting mechanisms are symmetrically arranged at the two apex corners of the bottom front of the lifting bracket 2-2. The two mechanisms are fixedly connected to the lifting bracket 2-2 by two vertically arranged connecting shafts 2-9. Specifically, the first connecting mechanism includes a first grooved wheel fixing plate. The first grooved wheel fixing plate is vertically arranged, and two first grooved wheels are arranged at intervals from top to bottom on its outer side. The two first grooved wheels are arranged to rotate freely with their axes perpendicular to the first grooved wheel fixing plate. The first grooved wheel fixing plates of the two first connecting mechanisms are connected by a first upper connecting shaft 2-10 and a first lower connecting shaft 2-12 at intervals from top to bottom. The two shafts are fixedly connected to the first grooved wheel fixing plate by bushings at both ends. Two first reinforcing plates 2-11 are symmetrically arranged and fixed on the two connecting shafts from left to right. The four first grooved wheels on the two first connecting mechanisms are rotatably arranged in the first slide of the frame 1, so as to guide the two first connecting mechanisms to reciprocate in the vertical direction.

[0043] Two second connecting mechanisms are symmetrically arranged at the two top corners of the bottom rear end of the lifting bracket 2-2. Specifically, each second connecting mechanism includes a vertically arranged second grooved wheel fixing plate 2-3, on which two second grooved wheels 2-6 are arranged vertically and vertically on its outer side plate. The two second grooved wheels 2-6 are arranged to rotate freely with their axes perpendicular to the second grooved wheel fixing plate 2-3. A second upper connecting shaft 2-5 and a second lower connecting shaft 2-13 are arranged vertically and vertically between the second grooved wheel fixing plates 2-3 of the two second connecting mechanisms. The two ends of the shafts are fixedly connected to the two second grooved wheel fixing plates 2-3 by bushings. Two second reinforcing plates are symmetrically arranged and fixed on the two connecting shafts, and a lifting connecting plate 2-4 is arranged in the center. The top of the lifting connecting plate 2-4 is fixed to the bottom surface of the lifting bracket 2-2. The four second grooved wheels on the two second connecting mechanisms are rotatably arranged in the second slide of the frame 1, so as to maintain the reciprocating movement of the two second connecting mechanisms in the vertical direction by using the second slide as a guide structure. Each second connecting mechanism also includes a lifting plate 2-8 arranged parallel to the second grooved wheel fixing plate 2-3. Multiple through holes are spaced apart from top to bottom on the plate surface for height-adjustable connection with the transmission mechanism 4 to adjust the overall tilt angle of the transmission mechanism and the ball-scooping mechanism 5 connected thereon. The lifting plate 2-8 is movably inserted through the top through hole onto the second lower connecting shaft 2-13 adjacent to the second grooved wheel fixing plate 2-3.

[0044] See Figure 5 The transmission mechanism 4 includes a transmission motor 4-1 and a chain drive assembly mounted on an inverted L-shaped base frame 4-2. The transmission motor 4-1 is used to drive the chain drive assembly.

[0045] The drive motor 4-1 is arranged along the width direction of the base frame 4-2. In this embodiment, a motor adjustment plate 4-4 is fixed in the middle of the base frame 4-2, and the drive motor 4-1 is arranged on the motor adjustment plate 4-4. An inverted U-shaped sleeve is provided on the plate, and the two ends of the inverted U-shaped sleeve are fixed to the base frame 4-2 by two sets of adjusting bolts 4-5. In addition, in order to maintain the structural balance of the transmission mechanism, three counterweight plates 4-3 are provided on the longitudinal frame located at the rear of the base frame 4-2.

[0046] The chain drive assembly is located at the long edge of one side of the front end of the base frame 4-2, adjacent to the output shaft of the drive motor 4-1. The chain drive assembly includes a bearing housing 4-11, which is fixed to the base frame 4-2 adjacent to the output shaft of the drive motor 4-1 by a horizontally arranged bearing housing mounting plate 4-14. A connecting shaft 4-13 is rotatably mounted inside the bearing housing 4-11, one end of which is fixedly connected to the output shaft of the drive motor 4-1 via a coupling 4-12. Preferably, adjusting lugs extend outward from the bottom ends on both sides of the bearing housing 4-11, and correspondingly, a bearing housing adjusting plate 4-15 fixed to the base frame 4-2 is provided below the bearing housing 4-11 to facilitate adjustment of the fixed position of the bearing housing 4-11.

[0047] Two sprockets 4-10 are vertically positioned on the side adjacent to the bearing housing 4-11 and the front end of the base frame 4-2, respectively. The sprocket 4-10 located on the side adjacent to the bearing housing 4-11 is fixed to the other end of the connecting shaft 4-13, serving as the driving sprocket and driven by the transmission motor 4-1. The sprocket 4-10 located at the front end of the base frame 4-2 is the driven sprocket, used to connect with the large ball retrieval mechanism. Chains 4-9 are sleeved on the outer sides of the two sprockets 4-10, allowing the driving sprocket to drive the driven sprocket to rotate synchronously via the chain 4-9. Two pairs of mounted bearings 4-6 are arranged along the width direction of the base frame 4-2 with their axes aligned, and are fixed to the bottom surface of the front and middle parts of the base frame 4-2, respectively. The two mounted bearings 4-6 in each pair are symmetrically arranged on the left and right sides of the base frame 4-2. The chain drive assembly is preferably protected by a chain guard 4-7 on its outer side and a dust baffle 4-8 sealing its inner side, increasing the service life of the transmission mechanism.

[0048] The transmission mechanism 4 also includes a connecting mechanism for movably connecting with the lifting mechanism 2. The connecting mechanism includes two shaft supports 4-18, which are symmetrically fixed to the top surface of the rear side of the base frame 4-2 by bolts. A short connecting shaft 4-17 is fixedly inserted into each shaft support 4-18 and is tightened by set screws. A long connecting shaft 4-16 is horizontally arranged between the two shaft supports 4-18, and its two ends are fixedly connected to the short connecting shaft 4-17 by bushings 4-19 and tightened by set screws. In practical applications, the long connecting shaft 4-16 is movably inserted into two through holes of equal height in the two lifting plates 2-8. The bushings at both ends of the first lower connecting shaft 2-12 are respectively inserted to the outside of the two first groove wheel fixing plates and are respectively fixed to the bearing side plates of the two seated bearings 4-6 located in the middle of the base frame 4-2, so as to realize the rotational connection between the first lower connecting shaft 2-12 and the two seated bearings 4-6, and thus form a rotational connection between the transmission mechanism 4 and the lifting mechanism 2.

[0049] See Figure 4 The ball-retrieval mechanism 3 includes a shearing mechanism and a retrieval mechanism mounted on the support 3-7.

[0050] The bracket 3-7 includes an inverted U-shaped frame body, with a U-shaped handle fixed to the upper part of its back side for easy loading and unloading, and a reinforcing diagonal brace 3-11 fixed to its lower side. The bracket 3-7 is obliquely fixed to the top front side of the base frame 4-2 by a connecting plate at the bottom end of the inverted U-shaped frame body and the reinforcing diagonal brace 3-11. Two lifting rings 3-6 are symmetrically arranged on the top surface of the inverted U-shaped frame body, which are used to connect to two lifting rings 1-25 on the first mounting base 1-17 via a safety chain. A lifting ring 3-6 is arranged on the top side of one side wall of the inverted U-shaped frame body, which is used to connect to the winch mechanism.

[0051] The shearing mechanism is located on the front side of the inverted U-shaped frame. It includes a horizontally positioned shearing seat 3-4, with rotating shafts at both ends. Each shaft is rotatably mounted on either side of the inverted U-shaped frame via two bearing seats 3-5. Seven vertically penetrating first mounting holes are evenly spaced along the y-axis on the shearing seat 3-4. Seven shearing teeth 3-3 are respectively inserted and fixed within each of these first mounting holes to form a shearing rake. Specifically, each shearing tooth 3-3 is a straight tooth. The fixing method for each shearing tooth 3-3 is as follows: seven screw holes communicating with each of the first mounting holes are located on the front side of the shearing seat 3-4. A locking bolt 3-9 is threaded through and connected to each screw hole, so that the tail end of the locking bolt 3-9 tightly abuts against the... On the side wall of the shearing tooth 3-3 in the second mounting hole, the shearing tooth 3-3 is fixed to the shearing seat 3-4; a screw 3-8 is horizontally arranged above the shearing seat 3-4, with both ends of the screw 3-8 fixed to the two sides of the inverted U-shaped frame, and the top sides of the seven shearing teeth 3-3 are rotatably sleeved on the screw 3-8; since the bracket 3-7 is set obliquely forward on the base frame 4-2, the shearing rake is also initially set obliquely forward; a tension spring 3-10 is set between the top side of each shearing tooth 3-3 and the top side of the inverted U-shaped frame, and each tension spring is initially set in its natural state so that when the shearing rake rotates forward during actual use, it can return to its initial setting state under the action of the seven tension springs 3-10.

[0052] The retrieval mechanism is located below the shearing mechanism. It includes a main rotating body 3-1 with rotating shafts at both ends, which pass through two bearings 4-6 located at the front end of the base frame 4-2, allowing the main rotating body 3-1 to rotate freely around its axis. Simultaneously, one end of the rotating shaft of the main rotating body 3-1 extends to the outside of the bearing 4-6, passing through and being fixed to the center hole of the driven sprocket. Eight vertically penetrating second mounting holes are equally spaced along the y-axis on the main rotating body 3-1. Eight rake teeth 3-2 are respectively inserted and fixed within each second mounting hole to form a retrieval rake. The eight rake teeth 3-2 of the retrieval rake and the seven shearing teeth 3-3 of the shearing rake are arranged in an alternating pattern, and the shearing teeth 3-... 3. Initially, a nearby retrieval rake is set at the bottom end to effectively complete the shearing and crushing action of the large ball. Specifically, the rake teeth 3-2 are composed of two zigzag teeth with obtuse angles and are fixedly connected in opposite directions. All eight rake teeth 3-2 are arranged obliquely with their front and rear angles facing upwards, and the gap between adjacent rake teeth 3-2 is smaller than the diameter of the large ball. Correspondingly, eight screw holes communicating with each second mounting hole are opened on the front side of the main rotating body 3-1. Each screw hole is threaded with a locking bolt, so that the tail end of the locking bolt is pressed against the side wall of the rake tooth 3-2 in the second mounting hole, thereby fixing the rake tooth 3-2 on the main rotating body 3-1.

[0053] In practical applications, see Figure 6 The large ball retrieval mechanism is rotatably connected to the driven sprocket of the transmission mechanism via the main rotating body 3-1. The drive sprocket is driven by the transmission motor 4-1, which in turn drives the driven sprocket to rotate. The driven sprocket then drives the main rotating body 3-1 to rotate, thereby controlling the rotation of the retrieval rake of the large ball retrieval mechanism. In the initial state, the retrieval rake is set at an angle forward, with the front end of each rake tooth 3-2 horizontal. The drive motor 4-1 drives the main rotating body 3-1 to rotate the retrieval rake along the material flow direction in the pelletizing pan, causing the retrieval rake to retrieve the large balls in the pelletizing pan, while the small balls leak out from the gaps between the rake teeth 3-2. As the retrieval rake rotates relative to the shearing rake, the rake teeth 3-2 and the shearing teeth 3-3 pass through each other. The large balls retrieval rakes are sheared into small fragments by the shearing teeth 3-3 as they slide backward, and then fall back into the pelletizing pan for re-pelleting.

[0054] like Figure 7 and Figure 9 As shown, the winch mechanism consists of a winch 5-1 and a pulley 5-2, which are fixed above the rear and front ends of the second mounting base 1-18, respectively. A steel wire rope is wound on the winch 5-1, and the end of the steel wire rope passes around the pulley 5-2 and is connected to a hook to connect the end of the steel wire rope to the lifting ring 3-6 on the top side of one side wall of the inverted U-shaped frame. Furthermore, by controlling the winch 5-1 to wind up and unwind the steel wire rope, the tilt angle of the base frame 4-2, which is fixedly connected to the large ball retrieval mechanism, can be adjusted.

[0055] See Figure 8 The detection mechanism 6 consists of a ball-scooping mechanism detection device, a foreign object detection mechanism, and a lifting mechanism position detection mechanism; in this embodiment, the first sensor, the second sensor, and the third sensor are all non-contact proximity sensors.

[0056] The detection device for the large ball retrieval mechanism includes a first sensor, whose first detector 6-1 is fixed on one side of the outer wall of the front end of the base frame 4-2, and whose first sensing plate 6-2 is fixed on the end face of the main rotating body 3-1 where the sprocket is not installed (specifically, at a position that does not interfere with the installation of the connecting shaft). The first detector 6-2 and the first detector 6-1 are set on the same side, and the setting position of the first detector 6-2 satisfies the following: when the rear end of the retrieval rake of the large ball retrieval mechanism 3 is set horizontally, the first sensing plate 6-2 is aligned with the first detector 6-1 and emits a first sensing signal. At this time, the retrieval rake is in the initial setting state.

[0057] In practical applications, in the initial state, the rear end of the retrieval rake of the large ball retrieval mechanism 3 is set horizontally. During the retrieval of the large ball, the retrieval rake rotates counterclockwise at a certain angle to retrieve the large ball. During this process, the rotation of the retrieval rake is achieved by the counterclockwise rotation of the main rotating body 3-1. Therefore, by setting the position of the first sensing plate 6-2 on the main rotating body 3-1, it is possible to control that after each retrieval action, the retrieval rake can be reset using the first sensor, so that the retrieval rake is placed into the ball-making tray with its rear end set horizontally each time.

[0058] The foreign object detection mechanism includes a second sensor, with its second sensing plate 6-4 fixed at one end face of the shearing seat 3-4 (specifically, at a position that does not obstruct the installation of the connecting shaft), and its second detector 6-3 fixed on the bracket 3-7. The positioning of the sensor satisfies the following condition: when the shearing rake drives the shearing seat 3-4 to flip downward, the second sensing plate 6-4 can align with the second detector 6-3 and emit a second sensing signal.

[0059] In practical applications, when a foreign object is caught, the shearing tooth 3-3 will be stuck and unable to move relative to the rake tooth, causing the shearing rake to drive the shearing seat 3-4 to flip downwards synchronously. The second detector 6-3 will then align with the second sensing plate 6-4 and send out a second sensor signal. The second sensor signal serves as an alarm signal to prompt on-site personnel to stop the machine for handling.

[0060] The lifting mechanism position detection mechanism includes a sensor bracket 6-6 and a third sensor. The sensor bracket 6-6 is vertically positioned between the fifth longitudinal support beam 1-5 and the sixth longitudinal support beam 1-6, with its two ends fixed to the eighth connecting beam 1-20 and the sixth connecting beam 1-12, respectively. The third sensor consists of a third detector 6-7 and four third sensing plates 6-5, which are spaced apart from top to bottom on the sensor bracket 6-6. Two third sensing plates 6-5 located at both ends of the sensor bracket 6-6 are respectively positioned at the upper limit position and the lower limit position of the lifting mechanism 2, while two third sensing plates 6-5 located in the middle of the sensor bracket 6-6 are respectively positioned at the lifting working position and the lowering working position of the lifting mechanism 2. The third detector 6-7 is located inside the vertical frame of the base frame 4-2 and can be aligned with each of the third sensing plates 6-5 during the lifting and lowering movement of the base frame 4-2.

[0061] In practical applications, the lifting mechanism 2 is driven by the lifting motor 2-1 to lift and lower the ball. When the device does not need to retrieve the large ball, the lifting mechanism 2 is lifted by the lifting motor 2-1 until the third detector 6-7 is aligned with the third sensor plate 6-5 on the sensor bracket 6-6 in the lifting working position, and a lifting working position completion signal is issued, at which point the lifting motor 2-1 stops rotating. Similarly, when the device needs to retrieve the large ball, the lifting mechanism 2 is lowered by the lifting motor 2-1 until the third detector 6-7 is aligned with the third sensor plate 6-5 on the sensor bracket 6-6 in the lowering working position, and a lowering working position completion signal is issued, at which point the lifting motor 2-1 stops rotating. If the second mechanical hard limit fails due to detachment, when the lifting mechanism 2 is lifted by the lifting motor 2-1 until the third detector 6-7 is aligned with either of the third sensor plates 6-5 on both ends of the sensor bracket 6-6, and an alarm signal is issued, it indicates that there is a problem with the control of the lifting motor 2-1. This alarm signal can directly drive the device to perform an emergency power-off protection to prevent damage to the device.

[0062] See Figure 1The device also includes a control device 7 for controlling the working state of the lifting mechanism 2 and the rotating mechanism 4. This control device is housed in a double-door electrical control box and connected to an external power supply to adapt to the dusty environment of the pelletizing site. The control device 7 is electrically connected to the lifting motor 2-1 to control its working state. It is also electrically connected to the drive motor 4-1 to control its working state. Furthermore, the control device 7 is electrically connected to the detectors of the first, second, and third sensors to collect sensor signals to assist in resetting the retrieval rake, timely detection of foreign objects, and control the lifting and lowering of the lifting mechanism 2. In this embodiment, the control device 7 is controlled by a PLC. The control device 7 also includes a control panel, which can be equipped with an automatic switching switch, an emergency stop button, an audible and visual alarm, a power indicator light, a lifting button, a lowering button, a rake tooth forward rotation button, a rake tooth reverse rotation button, a lifting limit indicator light, a lowering limit indicator light, and a foreign object detection indicator light, all designed for easy operation and prompting by on-site personnel.

[0063] See Figure 1 and Figure 9 The working principle of the special rake tooth device for catching large balls in this disc ball maker is described as follows.

[0064] In use, the device is installed above the ball-out area of ​​the ball-forming plate. By controlling the overall descent of the lifting mechanism and the large ball-catching mechanism, the rake teeth of the retrieval rake are inserted into the vortex area where the large balls are rolling. The base frame is angled by a winch and locked by a lifting plate in conjunction with the long shaft.

[0065] After receiving the operation signal, the drive motor starts, which drives the retrieval rake of the large ball retrieval mechanism to rotate through the chain drive assembly; at the same time, the lifting motor starts to drive the lifting mechanism to lower the large ball retrieval mechanism to the lowering working position; at this time, the retrieval rake has begun to retrieve the balls in the ball tray.

[0066] Once the large balls are removed or the preset ball-collecting time has been reached, the elevator begins to rotate in the opposite direction to drive the lifting mechanism to raise the large ball-collecting mechanism to the upper working position, away from the ball-making plate. At this time, the drive motor rotates the rake teeth to the initial position, that is, the rear end of the retrieval rake is set horizontally and parallel to the ball plate surface. Thus, one working cycle of the large ball-collecting equipment is completed. After the equipment stops, it waits for the next start signal to repeat the above actions.

[0067] In the above process, the retrieval rake of the large ball retrieval mechanism can adopt two rotation modes. Specifically, the first rotation mode is as described above: when the rake teeth 3-2 rotate in the same direction as the ball disk, the rake teeth will retrieve the large ball from the ball disk. At this time, the large ball is located between the rake teeth and the shearing teeth. Through the shearing motion of the rake teeth and the shearing teeth, the large ball is broken into small fragments and falls into the ball disk. The rotation direction of the rake teeth is set by the host computer. When a foreign object is caught, the shearing teeth 3-3 will drive the shearing seat 3-4 to rotate, and the sensor located at the shaft end of the shearing seat 3-4 will alarm. The equipment will reverse to discharge the foreign object or alarm and wait for manual intervention according to the program settings. The second mode is that the rotation direction of the retrieval rake is opposite to the rotation direction of the ball disk. In this state, the retrieval rake will pull the large ball and foreign object out of the ball disk. Through screening by the roller screen, the large ball and foreign object will be removed before entering the return conveyor belt. The two modes can be selected arbitrarily according to actual production needs.

Claims

1. A special rake tooth device for scooping large balls from a ball-making tray, characterized in that, This includes a lifting mechanism, a ball-catching mechanism, and a rotating mechanism mounted on the frame; among which, The frame is a frame structure with an opening on the front side, and a first mounting base is provided at the top front end. The lifting mechanism includes a lifting bracket partially inserted into the frame from the opening side, on which a lead screw is vertically fixed. The lead screw thread passes through the first mounting base to the top of the frame, and its lead screw nut is driven and connected to a lifting motor fixed at the top of the frame through a transmission mechanism. Two first connecting mechanisms and two second connecting mechanisms are symmetrically arranged at the bottom front end and rear end of the lifting bracket, respectively. The two first connecting mechanisms are fixedly connected to the lifting bracket through two connecting longitudinal shafts, so that their installation height is lower than the two second connecting mechanisms directly fixed to the lifting bracket. The two first connecting mechanisms and the two second connecting mechanisms are fixedly connected to each other through at least one connecting shaft. Two lifting plates are symmetrically sleeved on the connecting shaft between the two second connecting mechanisms. Multiple through holes are spaced apart from top to bottom on the surface of the lifting plates. The transmission mechanism includes an inverted L-shaped base frame, with the middle of the base frame rotatably mounted on the connecting shaft of the two first connecting mechanisms. The rear side of the base frame is movably inserted into the through holes of the two lifting plates through the connecting mechanisms. A transmission motor is provided on the top side of the base frame, and a chain drive assembly is provided on its side along the length of the base frame. The transmission motor is connected to the drive sprocket of the chain drive assembly. The large ball retrieval mechanism includes a bracket fixed obliquely forward on the front side of the base frame. The shearing mechanism includes a shearing seat rotatably mounted on the bracket in a horizontal state. Multiple shearing teeth are obliquely arranged and spaced apart and fixed on the shearing seat to form a shearing rake. The top side of each shearing tooth is movably sleeved on a screw fixed horizontally to the bracket and connected to the bracket by a tension spring. The retrieval mechanism is located below the shearing mechanism and includes a main rotating body. The two ends of the main rotating body are rotatably mounted at the front end of the base frame and are driven and connected to the driven sprocket of the chain drive assembly. Multiple rake teeth are spaced apart and fixed on the main rotating body to form a retrieval rake. Each rake tooth and each shearing tooth are arranged in an alternating manner to form a shearing action through relative motion.

2. The special rake tooth device for scooping large balls from a ball-forming tray according to claim 1, characterized in that, The frame includes two front longitudinal support beams, two middle longitudinal support beams, and two rear longitudinal support beams spaced apart from front to back. The top sides of each longitudinal support beam are fixedly connected as a whole by horizontally arranged connecting beams. Each adjacent front longitudinal support beam is reinforced with a horizontally arranged and / or obliquely arranged connecting beam, as are the middle longitudinal support beams and the rear longitudinal support beams. The two front longitudinal support beams and the two middle longitudinal support beams are symmetrically provided with track grooves on their opposite side walls to form a first slide and a second slide, respectively.

3. The special rake tooth device for scooping large balls from a pelletizing tray according to claim 2, characterized in that, At least one first grooved wheel is symmetrically arranged on the outer side of the two first connecting mechanisms, so that the two are slidably connected in the first slide rail through the first grooved wheel; at least one second grooved wheel is symmetrically arranged on the outer side of the two second connecting mechanisms, so that the two are slidably connected in the first slide rail through the second grooved wheel.

4. The special rake tooth device for scooping large balls from a pelletizing tray according to claim 3, characterized in that, Two first limiting blocks and two second limiting blocks are symmetrically fixed in the first and second slides, respectively, to form a second mechanical hard limiting assembly and limit the descent stroke of the lifting mechanism.

5. The special rake tooth device for scooping large balls from a ball-forming tray according to claim 1, characterized in that, The shearing tooth is a straight tooth; the rake tooth consists of two zigzag teeth with obtuse angles and fixedly connected in opposite directions, so that the rake teeth are arranged obliquely with their front and rear angles facing upwards, and the gap between adjacent rake teeth is smaller than the diameter of the large ball.

6. The special rake tooth device for scooping large balls from a pelletizing tray according to claim 1, characterized in that, It also includes a winch mechanism consisting of a winch and a pulley, which are respectively fixed to the rear and front sides of the second mounting base located on the top side of the frame; wherein, a steel wire rope is wound on the winch, and the end of the steel wire rope passes around the pulley and is connected to a hook; correspondingly, a lifting ring is provided on the side wall of the bracket near the winch mechanism, which is detachably connected to the hook to adjust the tilt angle of the large ball retrieval mechanism and the base frame.

7. The special rake tooth device for scooping large balls from a pelletizing tray according to claim 1, characterized in that, It also includes testing institutions, which include: The detection device for the large ball retrieval mechanism includes a first sensor; the first detector of the first sensor is fixed on one side of the outer wall of the front end of the base frame, and its first sensing plate is fixed on the end face of the main rotating body where the sprocket is not installed, and the setting position satisfies the following: when the rear end of the retrieval rake of the large ball retrieval mechanism is set horizontally, the first sensor and the first sensing plate are aligned and a first sensing signal is emitted. A foreign object detection mechanism includes a second sensor; the second sensor's second sensor is fixed at one end face of the shearing seat, and its second detection plate is fixed on the bracket, and the setting position satisfies that: when the shearing rake drives the shearing seat to flip downward, the second sensor plate can be aligned with the second detector and emit a second sensing signal. The lifting mechanism position detection mechanism includes a sensor bracket and a third sensor vertically mounted on one side of the frame; the third sensor has a third detector and four third sensing plates, which are spaced apart from top to bottom on the sensor bracket; two third sensing plates located at both ends of the sensor bracket are respectively positioned at the upper limit position and the lower limit position of the lifting mechanism, and two third sensing plates located in the middle of the sensor bracket are respectively positioned at the lifting working position and the lowering working position of the lifting mechanism; the third detector is mounted on the base frame and can be aligned with each of the third sensing plates during the lifting and lowering movement of the base frame.

8. The special rake tooth device for scooping large balls from a pelletizing tray according to claim 1, characterized in that, A connecting beam is horizontally installed at the bottom of the two front longitudinal support beams to form the first mechanical limiting component for limiting the downward flipping of the retrieval rake.

9. The special rake tooth device for scooping large balls from a pelletizing pan according to claim 1, characterized in that, In the transmission mechanism, multiple counterweight plates are installed on the vertical frame at the rear end of the base frame.

10. The special rake tooth device for scooping large balls from a pelletizing pan according to claim 1, characterized in that, Two lifting rings are symmetrically arranged on the first mounting base. Correspondingly, two lifting rings are symmetrically arranged on the top surface of the bracket. The two rings are connected to the two lifting rings on the first mounting base by a safety chain. Two lifting rings are symmetrically arranged at the two top corners of the top side rear end of the frame. These two rings, together with the two lifting rings symmetrically arranged on the first mounting base, are used for hoisting the device.

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