Graded screening device for hydrogen storage alloy powder

Abstract

The invention relates to the technical field of grading screening devices, and discloses a hydrogen storage alloy powder grading screening device which solves the problem that in the screening process of an existing hydrogen storage alloy powder grading screening device, caked raw materials cannot be scattered, accumulated raw materials cannot be scraped away, and therefore a screen is prone to being blocked. A first movable door is hinged to the front portion of the device body, a feeding box is fixedly installed at the top of the device body, a scattering rod is rotatably installed in the feeding box, a screening box is arranged in the device body, a second movable door is hinged to the front portion of the screening box, and a discharging valve is fixedly installed in the middle of the bottom of the device body. According to the classified screening device for the hydrogen storage alloy powder, caked raw materials can be effectively scattered in the screening process, and the accumulated raw materials can be scraped away, so that the screen 7 is prevented from being blocked, the screening efficiency is improved, and normal operation of the device is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of grading and screening devices, and in particular relates to a grading and screening device for hydrogen storage alloy powder. Background Art

[0002] Hydrogen storage alloy powder has the advantages of good safety, high hydrogen storage density, reversible hydrogen absorption and desorption, good cycle stability, etc., and is widely used in automobile manufacturing, aerospace, hydrogen energy and other fields; its performance is closely related to the particle size distribution of the powder, so grading and screening is particularly important; grading and screening of hydrogen storage alloy powder is a key process, which aims to optimize the performance of hydrogen storage alloy powder, such as hydrogen absorption and desorption rate, cycle stability, etc., through grading of different particle sizes; through grading and screening, hydrogen storage alloy powder with uniform particle size distribution can be obtained, thereby improving its hydrogen absorption and desorption rate, cycle stability and other properties; removing large particle impurities and coarse-grained powder that does not meet the requirements can reduce waste and improve the utilization rate of raw materials; different application fields have different requirements for the particle size of hydrogen storage alloy powder, and grading and screening can meet diverse market needs; however, the existing hydrogen storage alloy powder grading and screening device cannot break up the agglomerated raw materials during the screening process, and cannot scrape away the accumulated raw materials, which can easily lead to blockage of the screen, affecting the screening efficiency and the normal operation of the device. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a hydrogen storage alloy powder grading and screening device, which effectively solves the problem that the existing hydrogen storage alloy powder grading and screening device in the above background technology cannot break up the agglomerated raw materials during the screening process and cannot scrape away the accumulated raw materials, which easily leads to clogging of the screen.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a hydrogen storage alloy powder grading and screening device, comprising a device body, a first movable door is hingedly connected to the front part of the device body, a feed box is fixedly installed on the top of the device body, a breaking rod is rotatably installed inside the feed box, a screening box is arranged inside the device body, a second movable door is hingedly connected to the front part of the screening box, a discharge valve is fixedly installed in the middle part of the bottom of the device body, a hose is fixedly installed between the discharge valve and the feed box and the upper and lower ends of the screening box, two installation frames are fixedly installed inside the screening box, a screen is fixedly installed in the middle part of the two installation frames, the two screens have different mesh numbers and apertures for grading and screening, sweeping brushes are arranged on the upper surfaces of the two screens, and the upper parts on both sides of the screening box are A support arm is fixedly installed, and a sliding sleeve is fixedly installed in the middle of the two support arms. Sliding rods are inserted inside the sliding sleeves, and the tops of the sliding rods are fixedly connected to the inner top of the device body. Springs are provided on the surfaces of the two sliding rods, and the two ends of the two springs are respectively fixedly connected to the inner top of the device body and the top of the sliding sleeve. Limiting strips are fixedly installed on both sides of the two installation frames, and two limiting grooves are provided on the inner walls of the two sides of the screening box. Four limiting strips are respectively installed in the four limiting grooves. A motor is fixedly installed on the lower part of one side of the device body through a mounting table, and a transmission assembly is provided at the output end of the motor. The transmission assembly is transmission-connected to the sweeping brush, the screening box and the breaking rod. The motor can output power to the sweeping brush, the screening box and the breaking rod through the transmission assembly.

[0005] Preferably, the transmission assembly includes a first sprocket, a second sprocket, a rack and two second gears. The first sprocket is fixedly mounted on the output end of the motor, the second sprocket is rotatably mounted on the lower part of one side of the device body through an axle seat, the second sprocket and the first sprocket are meshed and connected with a chain, the rack is fixedly mounted on the middle part of the inner wall on the rear side of the device body, and the two second gears are arranged at the rear of the screening box.

[0006] Preferably, a first shaft is fixedly installed on the top of the second sprocket, and two first sleeves are rotatably installed on the surface of the first shaft, and the two first sleeves are fixedly connected to the device body through a fixing block, and a worm is fixedly installed on the top of the first shaft, and a positioning frame is rotatably installed on the top of the worm, and the bottom of the positioning frame is fixedly connected to one side of the top of the device body.

[0007] Preferably, the surface of the worm is meshingly connected with a worm wheel, one side of the worm wheel is rotatably connected to the positioning frame through a rotating shaft, and a second shaft rod is fixedly installed on the other side of the worm wheel, one end of the second shaft rod extends to the interior of the feed box and is fixedly connected to one end of the breaking up rod, and a second shaft sleeve is rotatably installed on the surface of the second shaft rod, and the second shaft sleeve is fixedly installed on one side of the feed box.

[0008] Preferably, a first gear is fixedly installed on the top of the first sprocket, and the top of the first gear is rotatably connected to the inner wall of the device body through a shaft seat, one side of the first gear is meshingly connected with an outer gear ring, a connecting ring is fixedly installed on the inner wall of the outer gear ring, a transmission ring is fixedly installed on the top of the connecting ring, a slip ring is fixedly installed on the circumferential surface of the transmission ring, an annular groove is opened on the inner wall of the device body, and the slip ring is slidably installed inside the annular groove.

[0009] Preferably, four transmission blocks are fixedly installed in an annular shape at equal distances on the top of the transmission ring, two balls are tightly attached to the top of the transmission ring, connecting blocks are movably installed on the top of the two balls, and the ends of the two connecting blocks close to each other are fixedly connected to the two sides of the screening box respectively.

[0010] Preferably, a third shaft rod is fixedly installed in the middle part of the second gear, two third shaft sleeves are fixedly installed on the surfaces of the two third shaft rods, the surfaces of the third shaft sleeves are fixedly connected to the screening box through a fixing rod, the two second gears are meshed with the rack, and the first bevel gears are fixedly installed at both ends of the two third shaft rods.

[0011] Preferably, one side of the first bevel gear is meshedly connected with the second bevel gear, one side of the second bevel gear is fixedly installed with a fourth shaft rod, one end of the four fourth shaft rods respectively extend to both sides of the inside of the two mounting frames and are fixedly installed with threaded rods, fourth shaft sleeves are rotatably installed on the surfaces of the four fourth shaft rods, the fourth shaft sleeves are fixedly connected to the screening box, and one end of the four threaded rods away from the fourth shaft rods are rotatably connected to the inside of the two mounting frames.

[0012] Preferably, the surface of the threaded rod is threadedly connected with a threaded sleeve, and connecting rods are fixedly installed on the surface of the threaded sleeve. One end of the four connecting rods are respectively fixedly connected to the two ends of the top of the two sweeping brushes, and the upper part of the inner walls on both sides of the two installation frames are fixedly installed with baffles to prevent powder from contaminating the surface of the threaded rod.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) During operation, the operator starts the motor to drive the first sprocket to rotate, and the first sprocket drives the second sprocket to rotate through the chain. When the second sprocket rotates, it drives the first shaft to rotate along the inside of the two first sleeves. When the first shaft rotates, it drives the worm to rotate along the positioning frame. When the worm rotates, it drives the worm wheel to rotate along the positioning frame. When the worm wheel rotates, it drives the second shaft to rotate along the inside of the second sleeve. When the second shaft rotates, it drives the breaking rod to rotate. Then the operator puts the hydrogen storage alloy powder into the feed box, so that the agglomerated hydrogen storage alloy powder can be broken up by the breaking rod, thereby improving the subsequent screening effect. The broken hydrogen storage alloy powder will enter the inside of the screening box through the hose, and will be graded and screened through the screens inside the two mounting frames in turn.

[0015] When the first sprocket rotates, the outer gear ring is also driven to rotate through the first gear. When the outer gear ring rotates, the transmission ring is driven to rotate through the connecting ring. When the transmission ring rotates, the slip ring is driven to rotate along the inside of the ring groove, which increases the stability of the transmission ring when rotating. When the transmission ring rotates, it drives the four transmission blocks to rotate. When the four transmission blocks rotate, they intermittently push the sub-screening box upward through the ball bearings and the connecting blocks. When the sub-screening box moves upward, the sliding sleeve is driven to slide along the surface of the sliding rod through the supporting arm, and the spring is squeezed at the same time. The spring quickly pushes the sub-screening box downward through its own elastic force. When the sub-screening box moves up and down quickly, the two screens can be driven to shake, thereby quickly screening the hydrogen storage alloy powder, thereby improving the efficiency of graded screening.

[0016] (2) When the sub-screening box moves up and down, it drives the two second gears to rotate along the rack. When the two second gears rotate, they drive the third shaft rod to rotate along the inside of the third shaft sleeve. When the two third shaft rods rotate, they drive the second bevel gear to rotate through the first bevel gear. When the second bevel gear rotates, they drive the fourth shaft rod to rotate along the inside of the fourth shaft sleeve. When the fourth shaft rod rotates, it drives the threaded sleeve to move through the threaded rod. Since the threaded rod has a large pitch, the threaded sleeve moves very fast. When the threaded sleeve moves, it drives the sweeping brush to move along the surface of the screen through the connecting rod, so that the hydrogen storage alloy powder on the screen can be swept to avoid the hydrogen storage alloy powder clogging the screen, thereby improving the screening efficiency and ensuring the normal operation of the device;

[0017] After the screening is completed, the operator opens the first movable door on the device body and the second movable door on the screening box, so that the two installation frames and the four limit bars can be taken out along the inside of the limit groove, and then the hydrogen storage alloy powder screened on the two screens can be taken out and collected. At the same time, the operator opens the discharge valve, so that the hydrogen storage alloy powder at the bottom of the screening box can be discharged through the hose for collection;

[0018] (3) The hydrogen storage alloy powder grading and screening device can effectively break up the agglomerated raw materials and scrape away the accumulated raw materials during the screening process, thereby avoiding clogging of the screen, improving the screening efficiency and ensuring the normal operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0020] In the attached picture:

[0021] Figure 1 This is a schematic structural diagram of a hydrogen storage alloy powder grading and screening device according to the present invention;

[0022] Figure 2 It is a schematic diagram of the internal structure of the device body and the feed box of the present invention;

[0023] Figure 3 This is a schematic diagram of the internal structure of the screening box of the present invention;

[0024] Figure 4 For the present invention Figure 3 A schematic cross-sectional structure diagram of ;

[0025] Figure 5 For the present invention Figure 3 A schematic diagram of a local enlarged structure;

[0026] Figure 6 For the present invention Figure 5 The enlarged structural diagram at A in the middle;

[0027] Figure 7 For the present invention Figure 3 The enlarged structural diagram at B in the middle;

[0028] Figure 8 This is a schematic diagram of the rear structure of the screening box of the present invention;

[0029] Fig. 9 For the present invention Figure 8 A schematic cross-sectional structure diagram of ;

[0030] Fig.10 It is a schematic diagram of the top view of the transmission ring of the present invention;

[0031] In the figure: 1, device body; 2, first movable door; 3, feed box; 4, screening box; 5, second movable door; 6, discharge valve; 7, hose; 8, support arm; 9, slide bar; 10, slide sleeve; 11, spring; 12, rack; 13, installation frame; 14, screen; 15, sweeping brush; 16, limit strip; 17, limit groove; 18, baffle; 19, motor; 20, breaking rod; 21, first sprocket; 22, connecting rod; 23, second sprocket; 24, chain; 25, first shaft rod; 26, first A sleeve; 27, worm; 28, positioning frame; 29, worm wheel; 30, second shaft; 31, second shaft sleeve; 32, first gear; 33, outer gear ring; 34, connecting ring; 35, transmission ring; 36, slip ring; 37, ring groove; 38, transmission block; 39, ball; 40, connecting block; 41, second gear; 42, third shaft; 43, third shaft sleeve; 44, first bevel gear; 45, second bevel gear; 46, fourth shaft; 47, fourth shaft sleeve; 48, threaded rod; 49, threaded sleeve. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] Embodiment 1, by Figures 1 to 10 The present invention comprises a device body 1, a first movable door 2 is hingedly connected to the front of the device body 1, a feed box 3 is fixedly installed on the top of the device body 1, a breaking rod 20 is rotatably installed inside the feed box 3, a screening box 4 is arranged inside the device body 1, a second movable door 5 is hingedly connected to the front of the screening box 4, a discharge valve 6 is fixedly installed in the middle of the bottom of the device body 1, a hose 7 is fixedly installed between the discharge valve 6 and the upper and lower ends of the feed box 3 and the screening box 4, two installation frames 13 are fixedly installed inside the screening box 4, a screen 14 is fixedly installed in the middle of the two installation frames 13, the two screens 14 have different mesh numbers and apertures for graded screening, a sweeping brush 15 is provided on the upper surface of the two screens 14, support arms 8 are fixedly installed on the upper parts of both sides of the screening box 4, and the middle parts of the two support arms 8 are fixed. A sliding sleeve 10 is installed, and sliding rods 9 are inserted inside the sliding sleeve 10. The tops of the sliding rods 9 are fixedly connected to the inner top of the device body 1. Springs 11 are provided on the surfaces of the two sliding rods 9. The two ends of the two springs 11 are respectively fixedly connected to the inner top of the device body 1 and the top of the sliding sleeve 10. Limiting strips 16 are fixedly installed on both sides of the two installation frames 13. Two limiting grooves 17 are provided on the inner walls of the two sides of the screening box 4. Four limiting strips 16 are respectively installed in the four limiting grooves 17. A motor 19 is fixedly installed on the lower part of one side of the device body 1 through a mounting table. A transmission assembly is provided at the output end of the motor 19. The transmission assembly is transmission-connected to the sweeping brush 15, the screening box 4 and the breaking rod 20. The motor 19 can output power to the sweeping brush 15, the screening box 4 and the breaking rod 20 through the transmission assembly.

[0034] During work, the operator starts the motor 19 to drive the transmission component to operate, and the transmission component drives the breaking rod 20 to rotate when it is running, and then the operator puts the hydrogen storage alloy powder into the feed box 3, so that the agglomerated hydrogen storage alloy powder clumps can be broken up by the action of the breaking rod 20, thereby improving the subsequent screening effect, and the broken hydrogen storage alloy powder will enter the interior of the screening box 4 through the hose 7, and pass through the screens 14 inside the two mounting frames 13 in turn for graded screening; while the transmission component is running, the screening box 4 will be intermittently pushed up, and when the screening box 4 moves up, the sliding sleeve 10 is driven by the support arm 8 to slide along the surface of the sliding rod 9, and at the same time, the spring 11 is squeezed, and the spring 11 quickly pushes the screening box 4 down by its own elastic force, and the two screens 14 can be driven to shake during the rapid up and down movement of the screening box 4, thereby quickly screening the hydrogen storage alloy powder, thereby improving the efficiency of graded screening;

[0035] When the screening box 4 moves up and down, the sweeping brush 15 will be driven by the transmission assembly to move along the surface of the screen 14, so that the hydrogen storage alloy powder on the screen 14 can be swept to avoid the hydrogen storage alloy powder from clogging the screen 14, thereby improving the screening efficiency and ensuring the normal operation of the device; after the screening is completed, the operator opens the first movable door 2 on the device body 1 and the second movable door 5 on the screening box 4, so that the two mounting frames 13 and the four limit bars 16 can be taken out along the inside of the limit groove 17, and then the hydrogen storage alloy powder screened from the two screens 14 can be taken out and collected, and at the same time, the operator opens the discharge valve 6, so that the hydrogen storage alloy powder at the bottom of the screening box 4 can be discharged through the hose 7 for collection; so that the hydrogen storage alloy powder grading and screening device can effectively break up the agglomerated raw materials during the screening process, and can scrape away the accumulated raw materials, thereby avoiding the clogging of the screen 14, improving the screening efficiency and ensuring the normal operation of the device.

[0036] Embodiment 2, on the basis of embodiment 1, the transmission assembly includes a first sprocket 21, a second sprocket 23, a rack 12 and two second gears 41, the first sprocket 21 is fixedly mounted on the output end of the motor 19, the second sprocket 23 is rotatably mounted on the lower part of one side of the device body 1 through the shaft seat, the second sprocket 23 and the first sprocket 21 are meshed and connected with a chain 24, the rack 12 is fixedly mounted on the middle part of the inner wall of the rear side of the device body 1, and the two second gears 41 are arranged at the rear of the sub-screen box 4; the second sprocket 23 A first shaft 25 is fixedly installed on the top, and two first shaft sleeves 26 are rotatably installed on the surface of the first shaft 25. The two first shaft sleeves 26 are fixedly connected to the device body 1 through a fixing block. A worm 27 is fixedly installed on the top of the first shaft 25, and a positioning frame 28 is rotatably installed on the top of the worm 27. The bottom of the positioning frame 28 is fixedly connected to one side of the top of the device body 1; a worm wheel 29 is meshedly connected to the surface of the worm 27, and one side of the worm wheel 29 is rotatably connected to the positioning frame 28 through a rotating shaft, and the other side of the worm wheel 29 is A second shaft rod 30 is fixedly installed on the side, one end of the second shaft rod 30 extends to the interior of the feed box 3 and is fixedly connected to one end of the scattering rod 20, a second shaft sleeve 31 is rotatably installed on the surface of the second shaft rod 30, and the second shaft sleeve 31 is fixedly installed on one side of the feed box 3; a first gear 32 is fixedly installed on the top of the first sprocket 21, the top of the first gear 32 is rotatably connected to the inner wall of the device body 1 through the shaft seat, one side of the first gear 32 is meshed with an outer gear ring 33, and the inner wall of the outer gear ring 33 is fixedly installed with a connecting A connecting ring 34 is provided with a transmission ring 35 fixedly mounted on the top of the connecting ring 34, a slip ring 36 is fixedly mounted on the circumferential surface of the transmission ring 35, an annular groove 37 is provided on the inner wall of the device body 1, and the slip ring 36 is slidably mounted inside the annular groove 37; four transmission blocks 38 are fixedly mounted in an annular manner at equal distances on the top of the transmission ring 35, two balls 39 are tightly attached to the top of the transmission ring 35, and connecting blocks 40 are movably mounted on the tops of the two balls 39, and the ends of the two connecting blocks 40 close to each other are fixedly connected to the two sides of the screening box 4 respectively.

[0037] The operator starts the motor 19 to drive the first sprocket 21 to rotate, and the first sprocket 21 drives the second sprocket 23 to rotate through the chain 24. When the second sprocket 23 rotates, it drives the first shaft 25 to rotate along the inside of the two first sleeves 26. When the first shaft 25 rotates, it drives the worm 27 to rotate along the positioning frame 28. When the worm 27 rotates, it drives the worm wheel 29 to rotate along the positioning frame 28. When the worm wheel 29 rotates, it drives the second shaft 30 to rotate along the inside of the second sleeve 31. When the second shaft 30 rotates, it drives the breaking rod 20 to rotate, so that the agglomerated hydrogen storage alloy powder can be broken up;

[0038] When the first sprocket 21 rotates, the outer gear ring 33 is also driven to rotate through the first gear 32. When the outer gear ring 33 rotates, the transmission ring 35 is driven to rotate through the connecting ring 34. When the transmission ring 35 rotates, the slip ring 36 is driven to rotate along the inside of the ring groove 37, thereby increasing the stability of the transmission ring 35 when rotating. When the transmission ring 35 rotates, it drives the four transmission blocks 38 to rotate. When the four transmission blocks 38 rotate, they intermittently push the sub-screen box 4 upward through the ball 39 and the connecting block 40.

[0039] Embodiment 3, on the basis of embodiment 2, a third shaft rod 42 is fixedly installed in the middle of the second gear 41, two third shaft rods 42 are fixedly installed on the surface of the two third shaft rods 42, the surface of the third shaft rods 43 is fixedly connected to the sub-screen box 4 through a fixing rod, the two second gears 41 are meshed with the rack 12, and the two ends of the two third shaft rods 42 are fixedly installed with a first bevel gear 44; one side of the first bevel gear 44 is meshed with a second bevel gear 45, and one side of the second bevel gear 45 is fixedly installed with a fourth shaft rod 46, and one end of the four fourth shaft rods 46 extends to the inside of the two mounting frames 13 respectively. Threaded rods 48 are fixedly installed on both sides, fourth shaft sleeves 47 are rotatably installed on the surfaces of the four fourth shaft rods 46, the fourth shaft sleeves 47 are fixedly connected to the screening box 4, and the ends of the four threaded rods 48 away from the fourth shaft rods 46 are respectively rotatably connected to the inside of the two mounting frames 13; threaded sleeves 49 are threadedly connected to the surfaces of the threaded rods 48, connecting rods 22 are fixedly installed on the surfaces of the threaded sleeves 49, one ends of the four connecting rods 22 are respectively fixedly connected to the two ends of the tops of the two sweeping brushes 15, and baffles 18 are fixedly installed on the upper parts of the inner walls on both sides of the two mounting frames 13 to prevent powder from contaminating the surfaces of the threaded rods 48.

[0040] When the sub-screen box 4 moves up and down, it will drive the two second gears 41 to rotate along the rack 12. When the two second gears 41 rotate, they will drive the third shaft rod 42 to rotate along the inside of the third shaft sleeve 43. When the two third shaft rods 42 rotate, they will drive the second bevel gear 45 to rotate through the first bevel gear 44. When the second bevel gear 45 rotates, it will drive the fourth shaft rod 46 to rotate along the inside of the fourth shaft sleeve 47. When the fourth shaft rod 46 rotates, it will drive the threaded sleeve 49 to move through the threaded rod 48. Since the pitch of the threaded rod 48 is large, the movement speed of the threaded sleeve 49 is very fast. When the threaded sleeve 49 moves, it drives the sweeping brush 15 to move through the connecting rod 22.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydrogen storage alloy powder grading and screening device, comprising a device body (1), characterized in that: The front part of the device body (1) is hinged with a first movable door (2), the top of the device body (1) is fixedly mounted with a feed box (3), the inside of the feed box (3) is rotatably mounted with a scrambling rod (20), the inside of the device body (1) is provided with a screening box (4), the front part of the screening box (4) is hinged with a second movable door (5), a discharge valve (6) is fixedly mounted in the middle of the bottom of the device body (1), the discharge valve (6) and the upper and lower parts of the feed box (3) and the screening box (4) are connected. A hose (7) is fixedly installed between the ends, two installation frames (13) are fixedly installed inside the screening box (4), and a screen (14) is fixedly installed in the middle of the two installation frames (13). The two screens (14) have different mesh numbers and apertures for graded screening. The upper surfaces of the two screens (14) are provided with sweeping brushes (15). Support arms (8) are fixedly installed on the upper parts of both sides of the screening box (4), and sliding sleeves (15) are fixedly installed in the middle of the two support arms (8). 10), a slide bar (9) is inserted into the interior of the slide sleeve (10), the top of the slide bar (9) is fixedly connected to the inner top of the device body (1), a spring (11) is provided on the surface of the two slide bars (9), the two ends of the two springs (11) are respectively fixedly connected to the inner top of the device body (1) and the top of the slide sleeve (10), the two sides of the two installation frames (13) are fixedly installed with a limit strip (16), the inner walls of the two sides of the screening box (4) are provided with two limit grooves (17), the four limit strips (16) are respectively installed in the four limit grooves (17), the lower part of one side of the device body (1) is fixedly installed with a motor (19) through a mounting table, the output end of the motor (19) is provided with a transmission assembly, the transmission assembly is connected to the sweeping brush (15), the screening box (4) and the scattering rod (20), and the motor (19) can output power to the sweeping brush (15), the screening box (4) and the scattering rod (20) through the transmission assembly.

2. A hydrogen storage alloy powder grading and screening device according to claim 1, characterized in that: The transmission assembly comprises a first sprocket (21), a second sprocket (23), a rack (12) and two second gears (41); the first sprocket (21) is fixedly mounted on the output end of the motor (19); the second sprocket (23) is rotatably mounted on the lower part of one side of the device body (1) via an axle seat; a chain (24) is meshedly connected between the second sprocket (23) and the first sprocket (21); the rack (12) is fixedly mounted on the middle part of the inner wall on the rear side of the device body (1); and the two second gears (41) are arranged at the rear of the screening box (4).

3. A hydrogen storage alloy powder grading and screening device according to claim 2, characterized in that: A first shaft (25) is fixedly mounted on the top of the second sprocket (23); two first shaft sleeves (26) are rotatably mounted on the surface of the first shaft (25); the two first shaft sleeves (26) are fixedly connected to the device body (1) via a fixing block; a worm (27) is fixedly mounted on the top of the first shaft (25); a positioning frame (28) is rotatably mounted on the top of the worm (27); the bottom of the positioning frame (28) is fixedly connected to one side of the top of the device body (1).

4. A hydrogen storage alloy powder grading and screening device according to claim 3, characterized in that: The surface of the worm (27) is meshingly connected with a worm wheel (29), one side of the worm wheel (29) is rotatably connected to the positioning frame (28) via a rotating shaft, and the other side of the worm wheel (29) is fixedly mounted with a second shaft rod (30), one end of the second shaft rod (30) extends to the interior of the feed box (3) and is fixedly connected to one end of the breaking rod (20), and a second shaft sleeve (31) is rotatably mounted on the surface of the second shaft rod (30), and the second shaft sleeve (31) is fixedly mounted on one side of the feed box (3).

5. The hydrogen storage alloy powder grading and screening device according to claim 2, characterized in that: A first gear (32) is fixedly mounted on the top of the first sprocket (21); the top of the first gear (32) is rotatably connected to the inner wall of the device body (1) via a shaft seat; one side of the first gear (32) is meshingly connected to an outer gear ring (33); a connecting ring (34) is fixedly mounted on the inner wall of the outer gear ring (33); a transmission ring (35) is fixedly mounted on the top of the connecting ring (34); a slip ring (36) is fixedly mounted on the circumferential surface of the transmission ring (35); an annular groove (37) is provided on the inner wall of the device body (1); and the slip ring (36) is slidably mounted inside the annular groove (37).

6. A hydrogen storage alloy powder grading and screening device according to claim 5, characterized in that: Four transmission blocks (38) are fixedly installed in an annular manner at equal intervals on the top of the transmission ring (35), two balls (39) are tightly attached to the top of the transmission ring (35), and connecting blocks (40) are movably installed on the tops of the two balls (39), and the ends of the two connecting blocks (40) close to each other are fixedly connected to the two sides of the screening box (4) respectively.

7. A hydrogen storage alloy powder grading and screening device according to claim 2, characterized in that: A third shaft rod (42) is fixedly mounted in the middle of each of the second gears (41); two third shaft sleeves (43) are fixedly mounted on the surfaces of each of the two third shaft rods (42); the surfaces of each of the third shaft sleeves (43) are fixedly connected to the screening box (4) via a fixing rod; the two second gears (41) are meshingly connected to the rack (12); and first bevel gears (44) are fixedly mounted on both ends of each of the two third shaft rods (42).

8. A hydrogen storage alloy powder grading and screening device according to claim 7, characterized in that: One side of the first bevel gear (44) is meshedly connected with the second bevel gear (45), one side of the second bevel gear (45) is fixedly installed with a fourth shaft rod (46), one end of the four fourth shaft rods (46) respectively extends to the two sides of the inside of the two installation frames (13) and is fixedly installed with a threaded rod (48), the surface of the four fourth shaft rods (46) is rotatably installed with a fourth shaft sleeve (47), the fourth shaft sleeve (47) is fixedly connected to the screening box (4), and one end of the four threaded rods (48) away from the fourth shaft rod (46) is rotatably connected to the inside of the two installation frames (13).

9. A hydrogen storage alloy powder grading and screening device according to claim 8, characterized in that: The surface of the threaded rod (48) is threadedly connected with a threaded sleeve (49), and the surface of the threaded sleeve (49) is fixedly mounted with a connecting rod (22), one end of each of the four connecting rods (22) is fixedly connected to the two ends of the top of the two sweeping brushes (15), and a baffle (18) is fixedly mounted on the upper part of the inner walls on both sides of the two installation frames (13) to prevent powder from being contaminated onto the surface of the threaded rod (48).

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