Block ore rotary feeder

Abstract

The present application relates to the technical field of rotary feeder, and discloses a lump ore rotary feeder, which comprises a speed reducer, a valve body, a feeding pipe and a discharging pipe, and further comprises end cover one and end cover two, a rotating shaft is rotatably arranged between the end cover one and the end cover two, a plurality of groups of discharging plates are arranged on the periphery of the rotating shaft, each group of the discharging plates comprises a fixed sleeve and an expansion plate, the fixed sleeve is arranged on the periphery of the rotating shaft, and the expansion plate is slidably arranged on one end of the fixed sleeve away from the rotating shaft. The expansion plate is in sliding fit with the fixed sleeve, and an elastic member is connected between the expansion plate and the fixed sleeve. When the lump material is stuck in the gap between the expansion plate and the inner wall of the valve body, the expansion plate is contracted to the inside of the fixed sleeve under the extrusion of the material, so that the impact force is effectively absorbed and the material is avoided, the bending deformation or fracture of the expansion plate caused by directly bearing the extrusion is avoided, and the expansion plate can be automatically reset after the material passes, so that the anti-sticking capacity and service life of the discharging plate are significantly improved.

Description

Technical Field

[0001] This invention relates to the field of rotary feeder technology, and more specifically to a lump ore rotary feeder. Background Technology

[0002] Rotary feeders (also known as star-shaped feeders or rotary valves) are widely used quantitative feeding devices in bulk material conveying systems. Their basic structure typically includes a motor, reducer, housing, impeller rotor with several blades, main shaft, bearings, and end covers. During operation, material falls from the upper hopper into the housing, filling the spaces between the blades. As the impeller rotates within the cylindrical housing, it is carried to the lower part for discharge, thus achieving uniform and continuous feeding. This equipment offers advantages such as uniform and accurate discharge, compact structure, good sealing performance, and convenient maintenance, and is currently widely used in feeding and conveying powdery and granular materials.

[0003] However, existing rotary feeders are primarily designed for conveying powdery and granular materials. When used to convey lumpy materials (such as lump ore, sintered ore, coke, and gravel), they exhibit significant limitations. Specifically, lumpy materials are large and irregularly shaped, making them prone to jamming in the gap between the inner wall of the casing and the impeller blades during impeller rotation. Once jamming occurs, the impeller's rotational resistance increases dramatically, potentially leading to motor overload and increased current, or even motor tripping and protection shutdown, or severe equipment failure such as blade breakage. Furthermore, as the material rotates with the impeller, centrifugal force causes it to move towards the inner wall of the casing. This results in a continuous accumulation of lumpy material on the inner wall, which not only forces the blades apart due to compression, causing bending and deformation and compromising the fit between the impeller and the casing, but also allows the accumulated material to form wedge-shaped blockages under gravity and friction, ultimately jamming at the discharge port and preventing normal discharge, severely impacting the equipment's operational reliability and service life. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a rotary feeder for lumpy ore, thereby preventing material jamming, overload, and deformation, and achieving stable feeding of lumpy materials.

[0005] The objective of this invention can be achieved through the following technical solutions: A rotary feeder for lump ore includes a geared motor, a valve body, a feed pipe, and a discharge pipe. The feeder also includes end cover one and end cover two. Both ends of the valve body are closed by end cover one and end cover two, respectively. A rotating shaft is rotatably mounted between end cover one and end cover two. Several sets of discharge plates are installed around the rotating shaft. Each set of discharge plates includes a fixed sleeve and a telescopic plate. The fixed sleeve is installed around the rotating shaft. The telescopic plate is slidably sleeved on the end of the fixed sleeve away from the rotating shaft. An elastic element two is connected between the telescopic plate and the fixed sleeve. Two sets of end plates are provided around the rotating shaft. The end plates abut against the sides of the discharge plates. An arc plate is provided on one side of the fixed sleeve. An arc sleeve is provided around the rotating shaft at the position corresponding to the arc plate. The arc plate is sleeved inside the arc sleeve. An elastic element one is connected between the arc plate and the arc sleeve. A locking mechanism for adjusting the locking state of the fixed sleeve is installed between the fixed sleeve and the rotating shaft. An auxiliary pushing mechanism is provided between the fixed sleeve and the rotating shaft. A convex shaft for driving the pushing mechanism passes through the rotating shaft.

[0006] As a further embodiment of the present invention: the locking mechanism includes a main rack, a driven rack, and a gear. The fixed sleeve has a movable groove inside. The main rack is fixedly installed at one end of the telescopic plate located inside the fixed sleeve. The gear is rotatably installed in the movable groove. The driven rack is slidably installed in the movable groove. The main rack and the driven rack are located on both sides of the gear and mesh with the gear. The outer periphery of the rotating shaft has a retaining groove. In the initial state, one end of the driven rack is engaged in the retaining groove.

[0007] As a further aspect of the present invention: both sides of the telescopic plate are provided with several protrusions. When the material accumulates on the inner wall of the valve body under the action of centrifugal force, it will squeeze the protrusions, causing the telescopic plate to retract into the fixed sleeve. The telescopic plate drives the main rack to move, and the main rack is driven by the gear to disengage from the slot, thereby releasing the fixed sleeve from its locked state.

[0008] As a further embodiment of the present invention: a fixing plate is fixedly installed on one side of the end cover 2, and an annular plate is rotatably installed on the inner side of the fixing plate. One end of the rotating shaft is fitted inside the annular plate. The annular plate is provided with a plurality of fixing parts for fixing the rotating shaft along its radial direction. One end of the convex shaft is provided with a fixing shaft. The fixing shaft passes through the end of the rotating shaft and the fixing plate. A pin for fixing the fixing shaft is installed on the fixing plate.

[0009] As a further embodiment of the present invention: the pushing mechanism includes a push plate, a guide rod, a connecting plate and a wedge plate. Push plates are symmetrically and slidably installed on both sides of the fixed sleeve. The push plates are connected to the rotating shaft through an elastic element. A guide groove is opened on the periphery of the convex shaft. The guide rod is slidably installed in the guide groove of the convex shaft. The connecting plate is fixedly installed on the guide rod and passes through the rotating shaft and extends to the position between the two sets of unloading plates. The wedge plate is fixedly installed at the end of the connecting plate away from the guide rod. The cross-section of the wedge plate is triangular and the wedge plate is located between the two push plates. The inclined surfaces on both sides of the wedge plate abut against the sides of the push plates on both sides.

[0010] As a further aspect of the present invention: the guide groove includes a connected circular arc segment and an outwardly convex arc segment, the outwardly convex arc segment protruding towards the discharge pipe side, and when the guide rod moves to the outwardly convex arc segment, the guide rod moves to the outside away from the rotating shaft.

[0011] As a further aspect of the present invention: the push plate is located on the outside of the arc-shaped sleeve, and the length of the push plate is equal to the length of the fixed sleeve.

[0012] As a further aspect of the present invention: both end cap one and end cap two are fixed to both ends of the valve body by bolts, and end cap two is provided with several guide shafts, which pass through the ear plate on end cap one.

[0013] The beneficial effects of this invention are: (1) The present invention sets up a sliding fit between the telescopic plate and the fixed sleeve, and connects an elastic element between the telescopic plate and the fixed sleeve. When the block material is stuck in the gap between the telescopic plate and the inner wall of the valve body, the telescopic plate can shrink into the fixed sleeve under the pressure of the material, thereby effectively absorbing the impact force and avoiding the material. This prevents the telescopic plate from bending or breaking due to direct pressure. After the material passes through, the telescopic plate can automatically reset, which significantly improves the anti-jamming ability and service life of the unloading plate.

[0014] (2) By setting a locking mechanism, when too much material accumulates between the two sets of unloading plates, the material squeezes the protrusions on the side of the telescopic plate to shrink the telescopic plate. Then, through the linkage of the main rack, gear and the driven rack, the driven rack is disengaged from the slot of the rotating shaft, releasing the rotation lock of the fixed sleeve relative to the rotating shaft. This allows the fixed sleeve to rotate around the rotating shaft to increase the space between the two sets of unloading plates, so that the accumulated material can be loosened and released. This effectively avoids the material being over-compacted and damaging the inner wall of the valve body or expanding the unloading plate and causing deformation. At the same time, it reduces the risk of blockage and ensures smooth unloading.

[0015] (3) By setting up a pushing mechanism, when the unloading plate rotates to the discharge pipe position, the guide rod slides along the guide groove on the convex shaft to the outer convex arc section, driving the connecting plate and the wedge plate to move outward. The wedge plate pushes the push plate along the side of the fixed sleeve through the inclined surfaces on both sides, completing the auxiliary pushing action, actively pushing out the material that may be blocked between the unloading plates, further improving the reliability and thoroughness of the discharge, and effectively preventing the material from getting stuck at the discharge port.

[0016] (4) By setting a guide shaft on the second end cover and passing through the ear plate on the first end cover, the rotating shaft and the unloading plate can be pulled out of the valve body as a whole during maintenance, which facilitates subsequent maintenance and cleaning operations; at the same time, it plays a guiding and centering role during assembly, ensuring the coaxiality of the rotating shaft and the valve body, enhancing the connection rigidity and stability between the end covers, and enabling the equipment to maintain reliable sealing performance when subjected to the impact and extrusion of blocky materials. Attached Figure Description

[0017] The invention will now be further described with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 This is a side cross-sectional view of the present invention; Figure 4 yes Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a schematic diagram of the unloading plate and end plate structure in this invention; Figure 6 This is a schematic diagram of the unloading plate structure in this invention; Figure 7 yes Figure 6 Enlarged structural diagram at point B; Figure 8 This is a schematic diagram of the cross-sectional structure of the unloading plate in this invention; Figure 9 yes Figure 8 Enlarged structural diagram at point C.

[0019] In the picture: 1. Gear motor; 2. Valve body; 21. Feed pipe; 22. Discharge pipe; 23. End cap one; 24. End cap two; 25. Guide shaft; 3. Fixing plate; 31. Ring plate; 32. Fixing component; 33. Pin; 4. Rotating shaft; 41. Slot; 5. Unloading plate; 51. Fixing sleeve; 511. Arc plate; 512. Arc sleeve; 513. Elastic component one; 514. Movable groove; 52. Telescopic plate; 521. Protruding strip; 53. Elastic component two; 6. End plate; 7. Locking mechanism; 71. Main rack; 72. Driven rack; 73. Gear; 8. Pushing mechanism; 81. Push plate; 811. Elastic component three; 82. Guide rod; 83. Connecting plate; 84. Wedge plate; 9. Protruding shaft; 91. Guide groove; 92. Fixing shaft. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1-9As shown, a rotary feeder for lump ore includes a geared motor 1, a valve body 2, a feed pipe 21, and a discharge pipe 22. The feeder also includes an end cover 23 and an end cover 24. The two ends of the valve body 2 are respectively closed by the end cover 23 and the end cover 24, and a rotating shaft 4 is rotatably mounted between the end cover 23 and the end cover 24. Several sets of discharge plates 5 are installed around the rotating shaft 4. Each set of discharge plates 5 includes a fixed sleeve 51 and a telescopic plate 52. The fixed sleeve 51 is installed around the rotating shaft 4, and the telescopic plate 52 is slidably sleeved on the end of the fixed sleeve 51 away from the rotating shaft 4, and the telescopic plate 52 is connected to the fixed sleeve 51. The rotating shaft 4 is equipped with a second elastic element 53. Two sets of end plates 6 are provided on the periphery of the rotating shaft 4. The end plates 6 abut against the side of the unloading plate 5. An arc plate 511 is provided on one side of the fixed sleeve 51. An arc sleeve 512 is provided on the periphery of the rotating shaft 4 corresponding to the position of the arc plate 511. The arc plate 511 is fitted inside the arc sleeve 512. An elastic element 513 is connected between the arc plate 511 and the arc sleeve 512. A locking mechanism 7 for adjusting the locking state of the fixed sleeve 51 is installed between the fixed sleeve 51 and the rotating shaft 4. A pushing mechanism 8 for assisting pushing is provided between the fixed sleeve 51 and the rotating shaft 4. A convex shaft 9 for driving the pushing mechanism 8 passes through the rotating shaft 4.

[0022] In practical application, the geared motor 1 drives the rotating shaft 4 to rotate, and the rotating shaft 4 drives the unloading plate 5 to rotate inside the valve body 2. After the material enters from the feed pipe 21, it falls into the space between the two sets of unloading plates 5 and rotates with the unloading plates 5. During the rotational conveying process, the material will move towards the inner wall of the valve body 2 under the action of centrifugal force. When a block of material is stuck in the gap between the telescopic plate 52 and the inner wall of the valve body 2, the telescopic plate 52 is squeezed by the material and shrinks into the fixed sleeve 51. The elastic element 53 is compressed, thereby preventing the telescopic plate 52 from bending, deforming or being damaged due to direct compression by the material. After the material passes through this position, the elastic element 53 releases its elastic force to push the telescopic plate 52 to automatically extend and reset, so that the unloading plate 5 returns to the normal working state. When too much material accumulates between the two sets of discharge plates 5, the material continues to accumulate and compact towards the inner wall of the valve body 2 under the action of centrifugal force. Through the irregular movement of the material during the rotational conveying process, the telescopic plate 52 contracts, thereby releasing the locking mechanism 7 from the locked state of the fixed sleeve 51. In conjunction with the arc plate 511 rotating along the arc sleeve 512, the space between the two sets of discharge plates 5 increases, allowing the accumulated material to loosen and be released, preventing the material from being over-compacted and damaging the inner wall of the valve body 2 or causing the discharge plates 5 to bend and deform.

[0023] Furthermore, the locking mechanism 7 includes a main rack 71, a secondary rack 72, and a gear 73. The fixed sleeve 51 has a movable groove 514 inside. The main rack 71 is fixedly installed at one end of the telescopic plate 52 located inside the fixed sleeve 51. The gear 73 is rotatably installed in the movable groove 514. The secondary rack 72 is slidably installed in the movable groove 514. The main rack 71 and the secondary rack 72 are located on both sides of the gear 73 and mesh with the gear 73. The outer periphery of the rotating shaft 4 has a retaining groove 41. In the initial state, one end of the secondary rack 72 is inserted into the retaining groove 41.

[0024] Both sides of the telescopic plate 52 are provided with several protrusions 521. When the material accumulates on the inner wall of the valve body 2 under the action of centrifugal force, it will squeeze the protrusions 521, causing the telescopic plate 52 to retract into the fixed sleeve 51. The telescopic plate 52 drives the main rack 71 to move. The main rack 71 is driven by the gear 73 to disengage from the rack 72 in the slot 41, thereby releasing the fixed sleeve 51 from the locked state.

[0025] In practical application, when too much material accumulates between the two sets of unloading plates 5, the material continues to accumulate and compact towards the inner wall of the valve body 2 under centrifugal force. The irregular movement of the material during rotational conveying causes it to squeeze the protrusions 521, thereby causing the telescopic plate 52 to contract. The contraction of the telescopic plate 52 drives the main rack 71 fixed at its end to move into the fixed sleeve 51. The main rack 71 drives the gear 73 to rotate, and the gear 73 drives the rack 72 to slide away from the slot 41 within the movable groove 514, causing the rack 72 to disengage from the slot 41. The fixed sleeve 51 is released from rotational lock relative to the rotating shaft 4. After the fixed sleeve 51 is released, under the pressure of the material and gravity, the fixed sleeve 51 rotates around the rotating shaft 4 along the arc sleeve 512 via the arc plate 511 on one side. The elastic element 513 is stretched or compressed, thereby increasing the space between the two sets of discharge plates 5, allowing the accumulated material to be loosened and released, avoiding the material from being over-compacted and damaging the inner wall of the valve body 2 or bending and deforming the discharge plates 5. In addition, after the space between the two sets of discharge plates 5 is increased, the possibility of the accumulated material blocking the valve is reduced, thereby ensuring smooth discharge.

[0026] like Figure 2 As shown, a fixing plate 3 is fixedly installed on one side of the end cap 24. An annular plate 31 is rotatably installed on the inner side of the fixing plate 3. One end of the rotating shaft 4 is fitted inside the annular plate 31. The annular plate 31 is provided with several fixing parts 32 for fixing the rotating shaft 4 along its radial direction. One end of the convex shaft 9 is provided with a fixing shaft 92. The fixing shaft 92 passes through the end of the rotating shaft 4 and the fixing plate 3. A pin 33 for fixing the fixing shaft 92 is installed on the fixing plate 3.

[0027] In practical application, the convex shaft 9 passes through the end of the rotating shaft 4 and the fixing plate 3 via the fixed shaft 92 and is fixed by the pin 33, so that the convex shaft 9 remains fixed and does not rotate with the rotating shaft 4; one end of the rotating shaft 4 is fitted into the ring plate 31 and radially positioned by the fixing member 32, ensuring the coaxiality and stability of the rotating shaft 4 during rotation, and facilitating subsequent disassembly.

[0028] like Figures 3-7 As shown, the feeding mechanism 8 includes a push plate 81, a guide rod 82, a connecting plate 83, and a wedge plate 84. The push plates 81 are symmetrically and slidably installed on both sides of the fixed sleeve 51. The push plates 81 are connected to the rotating shaft 4 through the elastic element 811. A guide groove 91 is provided on the periphery of the convex shaft 9. The guide rod 82 is slidably installed in the guide groove 91 of the convex shaft 9. The connecting plate 83 is fixedly installed on the guide rod 82, and the connecting plate 83 passes through the rotating shaft 4 and extends to the position between the two sets of unloading plates 5. The wedge plate 84 is fixedly installed at the end of the connecting plate 83 away from the guide rod 82. The cross section of the wedge plate 84 is triangular, and the wedge plate 84 is located between the two push plates 81. The inclined surfaces on both sides of the wedge plate 84 abut against the sides of the push plates 81 on both sides.

[0029] The guide groove 91 includes a connected circular arc segment and a convex arc segment. The convex arc segment protrudes towards the discharge pipe 22. When the guide rod 82 moves to the convex arc segment, the guide rod 82 moves to the outside away from the rotating shaft 4.

[0030] The push plate 81 is located outside the arc sleeve 512, and the length of the push plate 81 is equal to the length of the fixed sleeve 51.

[0031] In practical application, when the unloading plate 5 rotates with the rotating shaft 4 to the position of the discharge pipe 22, the guide rod 82 slides along the guide groove 91 to the convex arc section. The guide rod 82 is guided by the convex arc section to move outward away from the rotating shaft 4, driving the connecting plate 83 and the wedge plate 84 to move outward synchronously. The triangular cross section of the wedge plate 84 causes the inclined surfaces on both sides to generate a wedge-shaped thrust on the two push plates 81, pushing the two push plates 81 to slide outward along the side of the fixed sleeve 51, thereby completing the auxiliary pushing action and pushing out the blocked material. When the guide rod 82 passes the convex arc section and returns to the circular arc section, the circular arc section guides the guide rod 82 to move towards the rotating shaft 4 and reset. The elastic element 3 811 pulls the push plate 81 to reset.

[0032] like Figure 1 As shown, end cap 1 23 and end cap 24 are both fixed to both ends of valve body 2 by bolts. End cap 24 is provided with several guide shafts 25, which pass through the ear plate on end cap 1 23.

[0033] In practical application, end cap 1 23 and end cap 24 are respectively fixed to both ends of valve body 2 with bolts to form a closed conveying cavity, preventing material leakage during conveying. Several guide shafts 25 provided on end cap 24 pass through the ear plates on end cap 1 23, which are used to pull the rotating shaft 4 and the unloading plate 5 out of valve body 2 during maintenance, thereby facilitating subsequent maintenance and cleaning; at the same time, they guide the alignment of the end caps with the valve body during assembly, ensuring the coaxiality of the rotating shaft 4 and the valve body 2, and also enhancing the connection rigidity and stability between the end caps, so that the equipment can maintain reliable sealing performance when subjected to the impact and extrusion of blocky materials.

[0034] Working principle: When the rotary feeder for ore is working, the geared motor 1 drives the rotating shaft 4 to rotate, and the rotating shaft 4 drives several sets of discharge plates 5 to rotate inside the valve body 2. The material falls from the feed pipe 21 into the space between the two sets of discharge plates 5, and is carried to the direction of the discharge pipe 22 as the discharge plates 5 rotate, thus realizing quantitative feeding.

[0035] During the rotary conveying process, when a block of material gets stuck in the gap between the telescopic plate 52 and the inner wall of the valve body 2, the telescopic plate 52 is squeezed by the material and retracts into the fixed sleeve 51. The elastic element 53 is compressed, thereby preventing the telescopic plate 52 from bending, deforming or being damaged due to direct pressure from the material. After the material passes through this position, the elastic element 53 releases its elastic force to push the telescopic plate 52 to automatically extend and reset, so that the unloading plate 5 returns to its normal working state.

[0036] When too much material accumulates between the two sets of discharge plates 5, the material continues to accumulate and compact towards the inner wall of the valve body 2 under the action of centrifugal force. The irregular movement of the material during the rotational conveying process will squeeze the protrusions 521 on both sides of the telescopic plate 52, causing the telescopic plate 52 to contract inward towards the fixed sleeve 51. When the telescopic plate 52 contracts, it drives the main rack 71 to move inward towards the fixed sleeve 51. The main rack 71 drives the gear 73 to rotate, and the gear 73 drives the rack 72 to disengage from the slot 41 of the rotating shaft 4, releasing the rotational lock of the fixed sleeve 51 relative to the rotating shaft 4. At this time, under the action of material extrusion and gravity, the fixed sleeve 51 rotates around the rotating shaft 4 along the arc sleeve 512 via the arc plate 511 on one side. The elastic element 513 is stretched or compressed, thereby increasing the space between the two sets of discharge plates 5, allowing the accumulated material to loosen and be released, avoiding the material from being over-compacted and damaging the inner wall of the valve body 2 or bending and deforming the discharge plates 5.

[0037] When the unloading plate 5 rotates with the rotating shaft 4 to the position of the discharge pipe 22, the guide rod 82 slides along the guide groove 91 around the convex shaft 9 to the outer convex arc section. The guide rod 82 is guided by the outer convex arc section and moves outward away from the rotating shaft 4, driving the connecting plate 83 and the wedge plate 84 to move outward synchronously. The inclined surfaces on both sides of the triangular cross section of the wedge plate 84 generate a wedge-shaped thrust on the two push plates 81, pushing the two push plates 81 to slide outward along the side of the fixed sleeve 51, thereby actively pushing out any material that may be blocked between the two sets of unloading plates 5 to the discharge pipe 22. When the guide rod 82 passes the outer convex arc section and returns to the circular arc section, the guide rod 82 moves towards the direction closer to the rotating shaft 4 to reset, and the elastic element 811 pulls the push plate 81 to reset, completing a complete feeding and pushing cycle.

[0038] Throughout the operation, the convex shaft 9 passes through the end of the rotating shaft 4 and the fixed plate 3 via the fixed shaft 92, and is fixed by the pin 33, keeping the convex shaft 9 fixed and preventing it from rotating with the rotating shaft 4. One end of the rotating shaft 4 is fitted inside the ring plate 31 and radially positioned by the fixing member 32, ensuring the coaxiality and stability of the rotating shaft 4 during rotation. End cap 1 23 and end cap 24 are respectively fixed to both ends of the valve body 2 by bolts, forming a closed conveying cavity to prevent material leakage during conveying. The guide shaft 25 set on end cap 24 passes through the ear plate on end cap 1 23, allowing the rotating shaft 4 and the unloading plate 5 to be pulled out of the valve body 2 as a whole during maintenance, facilitating maintenance and cleaning.

Claims

1. A rotary feeder for lump ore, comprising a geared motor (1), a valve body (2), a feed pipe (21), and a discharge pipe (22), characterized in that, The feeder also includes end cover one (23) and end cover two (24). The two ends of the valve body (2) are respectively closed by end cover one (23) and end cover two (24), and a rotating shaft (4) is rotatably installed between end cover one (23) and end cover two (24). Several sets of unloading plates (5) are installed around the rotating shaft (4). Each set of unloading plates (5) includes a fixed sleeve (51) and a telescopic plate (52). The fixed sleeve (51) is installed around the rotating shaft (4), and the telescopic plate (52) is slidably sleeved on the end of the fixed sleeve (51) away from the rotating shaft (4). An elastic element two (53) is connected between the telescopic plate (52) and the fixed sleeve (51). Two sets of end plates (53) are provided around the rotating shaft (4). 6) The end plate (6) abuts against the side of the unloading plate (5). A circular arc plate (511) is provided on one side of the fixed sleeve (51). An arc sleeve (512) is provided on the outer periphery of the rotating shaft (4) corresponding to the position of the circular arc plate (511). The circular arc plate (511) is fitted inside the arc sleeve (512). An elastic element (513) is connected between the circular arc plate (511) and the arc sleeve (512). A locking mechanism (7) for adjusting the locking state of the fixed sleeve (51) is installed between the fixed sleeve (51) and the rotating shaft (4). A material pushing mechanism (8) for assisting material pushing is provided between the fixed sleeve (51) and the rotating shaft (4). A convex shaft (9) for driving the material pushing mechanism (8) is passed through the rotating shaft (4).

2. The rotary feeder for lump ore according to claim 1, characterized in that, The locking mechanism (7) includes a main rack (71), a secondary rack (72) and a gear (73). The fixed sleeve (51) has a movable groove (514) inside. The main rack (71) is fixedly installed at one end of the telescopic plate (52) inside the fixed sleeve (51). The gear (73) is rotatably installed in the movable groove (514). The secondary rack (72) is slidably installed in the movable groove (514). The main rack (71) and the secondary rack (72) are located on both sides of the gear (73) and mesh with the gear (73). The outer periphery of the rotating shaft (4) has a slot (41). In the initial state, one end of the secondary rack (72) is inserted into the slot (41).

3. The rotary feeder for lump ore according to claim 2, characterized in that, The telescopic plate (52) has several protrusions (521) on both sides. When the material accumulates on the inner wall of the valve body (2) under the action of centrifugal force, it will squeeze the protrusions (521) and cause the telescopic plate (52) to retract into the fixed sleeve (51). The telescopic plate (52) drives the main rack (71) to move. The main rack (71) is driven by the gear (73) to disengage from the rack (72) from the slot (41) and release the fixed sleeve (51) from the locked state.

4. The rotary feeder for lump ore according to claim 1, characterized in that, A fixing plate (3) is fixedly installed on one side of the end cap (24). A ring plate (31) is rotatably installed on the inner side of the fixing plate (3). One end of the rotating shaft (4) is fitted inside the ring plate (31). The ring plate (31) is provided with several fixing parts (32) for fixing the rotating shaft (4) along its radial direction. One end of the convex shaft (9) is provided with a fixing shaft (92). The fixing shaft (92) passes through the end of the rotating shaft (4) and the fixing plate (3). A pin (33) for fixing the fixing shaft (92) is installed on the fixing plate (3).

5. The rotary feeder for lump ore according to claim 4, characterized in that, The pushing mechanism (8) includes a push plate (81), a guide rod (82), a connecting plate (83), and a wedge plate (84). The push plates (81) are symmetrically slidably installed on both sides of the fixed sleeve (51). The push plates (81) are connected to the rotating shaft (4) through the elastic element (811). The outer periphery of the convex shaft (9) is provided with a guide groove (91). The guide rod (82) is slidably installed in the guide groove (91) of the convex shaft (9). The connecting plate (83) is fixedly installed on the guide rod (82). The connecting plate (83) passes through the rotating shaft (4) and extends to the position between the two sets of unloading plates (5). The wedge plate (84) is fixedly installed at the end of the connecting plate (83) away from the guide rod (82). The cross section of the wedge plate (84) is triangular. The wedge plate (84) is located between the two push plates (81). The inclined surfaces on both sides of the wedge plate (84) abut against the sides of the push plates (81) on both sides.

6. The rotary feeder for lump ore according to claim 5, characterized in that, The guide groove (91) includes a connected circular arc segment and an outward convex arc segment. The outward convex arc segment protrudes towards the discharge pipe (22). When the guide rod (82) moves to the outward convex arc segment, the guide rod (82) moves to the outside away from the rotating shaft (4).

7. The rotary feeder for lump ore according to claim 6, characterized in that, The push plate (81) is located on the outside of the arc sleeve (512), and the length of the push plate (81) is equal to the length of the fixed sleeve (51).

8. The rotary feeder for lump ore according to claim 1, characterized in that, Both end cap one (23) and end cap two (24) are fixed to both ends of valve body (2) by bolts. End cap two (24) is provided with several guide shafts (25), and the guide shafts (25) pass through the ear plate on end cap one (23).

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