Dolomite is opened with multi-particle classification screen box

Abstract

The application discloses a dolomite opening and using multi-particle size classification and screening box body, which comprises a base and a box body, an adjusting assembly is arranged between the base and the box body, lateral plates are fixedly connected to the two sides of the box body, a feeding box is fixedly connected to the top of the box body, a plurality of screening plates are arranged in the box body from top to bottom, screening assemblies are arranged on the two sides of the screening plates, and buffer assemblies are arranged at the bottom of the screening plates; the application relates to the technical field of dolomite particle screening. The white dolomite opening and using multi-particle size classification and screening box body is provided with overall aperture adjusting mechanisms and single aperture adjusting mechanisms, the aperture size of a single screening plate can be adjusted, and the single aperture adjusting mechanism is suitable for a scene in which a specific particle size range needs to be accurately controlled; meanwhile, the aperture sizes of a plurality of screening plates can be adjusted, and the single aperture adjusting mechanism is suitable for a scene in which materials with different particle size ranges need to pass through, and greater flexibility is provided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dolomite particle screening, in particular to a multi-particle size classification and screening box for dolomite mining. BACKGROUND

[0002] Dolomite can be used in building materials, ceramics, glass and refractory materials, chemical industry, agriculture, environmental protection, energy saving and other fields; it is mainly used as alkaline refractory material and flux for blast furnace ironmaking; it is used for producing calcium magnesium phosphate fertilizer and preparing magnesium sulfate; and it is used for producing glass and ceramic ingredients; in some applications, the particle size of dolomite needs to be screened and processed, and dolomite particles of different diameters are selected for different scenes.

[0003] There are many types of equipment on the market for screening the size of dolomite particles, which can meet the screening requirements, but still have the following shortcomings in use:

[0004] 1. The screening plate cannot be replaced according to the size of the dolomite particles to be screened;

[0005] 2. The hole diameter of the screening plate is fixed, i.e. only dolomite particles smaller than the hole diameter of the screening plate can be screened, and when different particle sizes of dolomite particles need to be screened, the screen must be replaced, and the screening work must be stopped during replacement, which obviously affects the efficiency of dolomite particles. SUMMARY

[0006] In view of the deficiencies of the prior art, the present application provides a multi-particle size classification and screening box for dolomite mining, which solves the technical problems mentioned in the background art.

[0007] To achieve the above purpose, the present application realizes the following technical scheme: a multi-particle size classification and screening box for dolomite mining, comprising a base and a box, an adjusting assembly is arranged between the base and the box, two lateral plates are fixedly connected to the two sides of the box, an inlet box is fixedly connected to the top of the box, a plurality of screening plates are arranged in the box from top to bottom, a screening assembly is arranged on both sides of the screening plate, and a buffer assembly is arranged at the bottom of the screening plate.

[0008] The screening plate comprises an installation frame slidingly installed on the box, a sliding groove is formed in the inner side end of the installation frame, a screen frame is slidingly connected in the sliding groove, a first screen plate and a second screen plate are slidingly arranged at the inner side end of the screen frame, the first screen plate is located above the second screen plate and is slidingly arranged therebetween, a pull frame is fixedly connected to one end of the screen frame, a U-shaped frame is fixedly connected to one end of the second screen plate, a single hole diameter adjusting mechanism is arranged at one end of the U-shaped frame, and overall hole diameter adjusting mechanisms are arranged on both sides of the U-shaped frame.

[0009] As a further preferred embodiment of the present technical solution, the front end surface of the box is provided with a discharging groove, the bottom of the discharging groove is fixedly connected with a discharging plate, and the discharging groove is slidably connected with a baffle.

[0010] As a further preferred embodiment of the present technical solution, the adjusting assembly comprises a support block, a fixed seat, a rotating rod, a rotating seat and a hydraulic telescopic cylinder, the fixed seat is fixedly installed at the top of the front end of the base, the rotating rod is rotatably installed at the top of the fixed seat, the rotating seat is rotatably installed on the rotating rod, the top of the rotating seat is fixedly connected with the bottom of the box, two support blocks are fixedly installed at the top of the rear end of the base, and the hydraulic telescopic cylinder is arranged between the two support blocks, the hydraulic telescopic cylinder is rotatably installed at the top of the base, and the output end of the hydraulic telescopic cylinder is rotatably connected with the bottom of the box.

[0011] As a further preferred embodiment of the present technical solution, the through holes on the first and second sieve plates on the mounting frame decrease from top to bottom, and the lowermost first and second sieve plates are not provided with through holes, and the through holes on the first and second sieve plates are of the same size.

[0012] As a further preferred embodiment of the present technical solution, the single aperture adjusting mechanism comprises a sliding bar fixedly installed at both ends of the U-shaped frame, and the sliding bar is slidably installed on the pull frame, the bottom of the sliding bar is engagedly connected with a drive gear, two drive gears are rotatably installed on the box and connected through a connecting rod, the U-shaped frame is rotatably connected with an adjusting rod at one end close to the pull frame, and the adjusting rod is threadedly installed on the pull frame.

[0013] As a further preferred embodiment of the present technical solution, the total aperture adjusting mechanism comprises a telescopic rod fixedly connected with both ends of the first sieve plate, and the telescopic rod is slidably installed on the pull frame, the other end of the telescopic rod is fixedly connected with a rack, one side of the rack is provided with a fixed block, the rack is slidably installed on the fixed block, the fixed block is fixedly installed on the horizontal plate, a moving rod is slidably connected with the fixed block, the moving rod is fixedly connected with a gear matched with the rack, a moving block is slidably connected in the fixed block, the top of the moving block is provided with a first spring, and the first spring is sleeved on the top of the moving rod.

[0014] As a further preferred embodiment of the present technical solution, the screening assembly comprises a plurality of fixed frames fixedly installed at both ends of the outer side of the box, and the fixed frames correspond one-to-one to the positions of the plurality of screening plates, two sliding rods are slidably connected with the fixed frame, one end of the sliding rod is fixedly connected with the outer wall of the screening plate, a second spring is arranged between the screening plate and the fixed frame, and the second spring is sleeved on the sliding rod, the top of one side of the fixed frame is fixedly connected with a drive motor, the output end of the drive motor is fixedly connected with a drive rod, the outer wall of the drive rod is fixedly connected with a protruding block, and the positions of the protruding block and the screening plate correspond to each other.

[0015] As a further preferred embodiment of the present technical solution, the buffer assembly comprises guide plates fixedly installed on both sides of the bottom of the mounting frame, and the two guide plates are inclinedly arranged, a conical buffer seat is arranged below the two guide plates, and the two ends of the conical buffer seat are fixedly connected with a moving seat, a guide rail is slidably connected with the moving seat, the guide rail is fixedly installed on the inner wall of the box through a connecting seat, and a third spring is arranged between the connecting seat and the moving seat, and the third spring is sleeved on the guide rail.

[0016] Compared with the prior art, the present technical solution has the following advantages:

[0017] By rotating the adjusting rod, the adjusting rod drives the U-shaped frame to move, the U-shaped frame drives the sliding bar to move on the drive gear, and the U-shaped frame can drive the second sieve plate to move on the sieve frame, so as to adjust the positional relationship between the second sieve plate and the first sieve plate. The change of the diameter of the through hole is realized by the misalignment of the through holes on the first sieve plate and the second sieve plate. The diameter of the through hole can be quickly adjusted without stopping the machine. The diameter of the through hole can be dynamically adjusted during the screening process, avoiding the problem of stopping the machine to replace different sieve specifications in the traditional device. The adjustment efficiency is high, and the adjustment is simple.

[0018] By using the moving rod, the gear, the moving block and the first spring, the gear drives the rack to move, so that the rack drives the telescopic rod and the first sieve plate to move on the sieve frame, thereby adjusting the positional relationship between the first sieve plate and the second sieve plate, and adjusting the diameter of the through hole, so as to control the size of the dolomite particles discharged, and by synchronously adjusting the diameters of multiple through holes, selecting the appropriate discharge through hole diameter, and thus realizing multi-stage screening, the adjustment efficiency is high, and the adjustment is simple.

[0019] By setting the overall hole diameter adjustment mechanism and the single hole diameter adjustment mechanism, when only adjusting the hole diameter of a single sieve plate, only the dolomite particles on that sieve plate will be affected, and the hole diameters of other sieve plates remain unchanged. This method is suitable for scenarios where dolomite particles within a specific particle size range need to pass through, and can more accurately control the screening results. When adjusting the hole diameters of multiple sieve plates simultaneously, the hole diameters of multiple sieve plates can be changed simultaneously. This method is suitable for scenarios where materials of different particle size ranges need to pass through, and can adjust the screening effect as needed. By simultaneously adjusting the hole diameters of multiple sieve plates, greater flexibility and range can be achieved.

[0020] By turning on the drive motor to drive the drive rod to rotate, the drive rod drives the protrusion to rotate, so that the protrusion moves horizontally on the box in the rotating process in cooperation with the sliding rods and the second springs on both sides, so that the sieve plate continuously moves back and forth to screen and process the dolomite particles.

[0021] Through the buffer assembly, the impact force of the dolomite particles is weakened, the damage to the screening plate is reduced, the impact force of the dolomite particles when falling on the screening plate can be effectively controlled, thereby preventing the problem that the overall screening plate is damaged due to the excessive impact force of the dolomite particles in the material falling process, and realizing the safe feeding of the dolomite particles. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0023] Figure 2 It is a schematic diagram of the structure of the back of the box in the present application;

[0024] Figure 3 It is a schematic diagram of the structure of the adjusting assembly in the present application;

[0025] Figure 4 It is a schematic diagram of the structure of the inside of the box in the present application;

[0026] Figure 5 It is a schematic diagram of the structure of the screening assembly in the present application;

[0027] Figure 6 It is a schematic diagram of the structure of the screening plate in the present application;

[0028] Figure 7 It is Figure 6 It is an enlarged view of A in the present application;

[0029] Figure 8 It is a schematic diagram of the structure of the overall aperture adjusting mechanism in the present application;

[0030] Figure 9 It is a schematic diagram of the structure of the buffer assembly in the present application.

[0031] In the figure: 1, base; 2, adjusting assembly; 3, cross plate; 4, box; 5, feeding box; 6, screening plate; 7, screening assembly; 8, buffer assembly; 21, support block; 22, fixed seat; 23, rotating rod; 24, rotating seat; 25, hydraulic telescopic air cylinder; 41, discharge chute; 42, discharge plate; 43, baffle; 61, mounting frame; 62, sliding groove; 63, first screen plate; 64, second screen plate; 65, screen frame; 66, sliding bar; 67, pull frame; 68, U-shaped frame; 69, adjusting rod; 610, telescopic rod; 611, rack; 612, fixed block; 613, moving rod; 614, gear; 615, moving block; 616, first spring; 71, fixed frame; 72, sliding rod; 73, second spring; 74, drive motor; 75, drive rod; 76, protruding block; 81, guide plate; 82, conical buffer seat; 83, moving seat; 84, guide rail; 85, third spring. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the accompanying drawings of the specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0033] Please refer to Figures 1-8 The present application provides a technical solution: a dolomite mining multi-particle classification screening box, comprising a base 1 and a box 4, an adjusting assembly 2 is arranged between the base 1 and the box 4, the two sides of the box 4 are fixedly connected with a horizontal plate 3, the top of the box 4 is fixedly connected with a feeding box 5, a plurality of screening plates 6 are arranged in the box 4 from top to bottom, screening assemblies 7 are arranged on the two sides of the screening plates 6, and a buffer assembly 8 is arranged at the bottom of the screening plates 6.

[0034] Please refer to Figure 1 A discharge slot 41 is formed on the front end surface of the box 4, a discharge plate 42 is fixedly connected to the bottom of the discharge slot 41, and a baffle 43 is slidably connected in the discharge slot 41. In the embodiment of the present application, an electromagnet is installed on the upper end of the discharge slot 41, and an iron sheet is installed on the upper end surface of the baffle 43. The iron sheet functions to enable the electromagnet after being powered to attract and hold the baffle 43. The lower end of the baffle 43 extends into the discharge slot 41, and a limiting slot is formed at the bottom of the discharge slot 41. The limiting slot is provided with an electromagnet and an iron sheet at the bottom of the baffle 43. In the initial state, the lower end of the electromagnet and the upper end surface of the baffle 43 are in an attracting state. Before feeding, the upper electromagnet is powered off, the electromagnet loses magnetism, and under the action of its own gravity, the baffle 43 moves downward into the limiting slot and is attracted to the bottom of the baffle 43. After screening is completed, the baffle 43 is manually pushed upward, and the lower electromagnet is powered off at the same time. The upper electromagnet is powered on, and the baffle 43 is attracted to the upper electromagnet at this time. The discharge slot 41 is opened, so that the dolomite particles with different particle diameters in the box 4 can be discharged through the discharge plate 42.

[0035] Please refer to Figure 3The adjusting assembly 2 comprises support blocks 21, a fixing seat 22, a rotating rod 23, a rotating seat 24 and a hydraulic telescopic cylinder 25. The fixing seat 22 is fixedly installed at the top of the front end of the base 1. The rotating rod 23 is rotatably installed at the top of the fixing seat 22. The rotating seat 24 is rotatably installed on the rotating rod 23, and the top of the rotating seat 24 is fixedly connected with the bottom of the box body 4. The two support blocks 21 are fixedly installed at the top of the rear end of the base 1 on both sides, and the hydraulic telescopic cylinder 25 is arranged between the two support blocks 21. The hydraulic telescopic cylinder 25 is rotatably installed at the top of the base 1, and the output end of the hydraulic telescopic cylinder 25 is rotatably connected with the bottom of the box body 4. In the embodiment of the present application, when the bottom of the box body 4 is in contact with the top of the two support blocks 21, the box body 4 is in a horizontal state. At this time, the support blocks 21, the fixing seat 22 and the rotating seat 24 support the box body 4. When the hydraulic telescopic cylinder 25 is turned on, the output end of the hydraulic telescopic cylinder 25 drives the box body 4 to tilt to the front end side, so that the dolomite particles screened on the screening plate 6 are discharged and collected.

[0036] Please refer to Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 The screening plate 6 comprises a mounting frame 61 slidably installed on the box body 4. A sliding groove 62 is formed in the inner side end of the mounting frame 61. A sieve frame 65 is slidably connected in the sliding groove 62. A first sieve plate 63 and a second sieve plate 64 are slidably arranged at the inner side end of the sieve frame 65. The first sieve plate 63 is located above the second sieve plate 64. A pull frame 67 is fixedly connected to one end of the sieve frame 65. A U-shaped frame 68 is fixedly connected to one end of the second sieve plate 64. The U-shaped frame 68 is provided with a single aperture adjusting mechanism at one end, and overall aperture adjusting mechanisms are arranged on both sides of the U-shaped frame 68.

[0037] The through holes in the first sieve plate 63 and the second sieve plate 64 on the mounting frame 61 decrease from top to bottom. The lowermost first sieve plate 63 and the second sieve plate 64 are not provided with through holes. The through holes in the first sieve plate 63 and the second sieve plate 64 are of the same size. The through holes in the first sieve plate 63 and the second sieve plate 64 decrease from top to bottom, so as to screen different particle sizes of dolomite and classify dolomite with different particle sizes.

[0038] The single aperture adjusting mechanism comprises sliding strips 66 fixedly installed at both ends of the U-shaped frame 68 and slidably installed on the pull frame 67. The bottom of the sliding strip 66 is engagedly connected with a drive gear. Two drive gears are rotatably installed on the box body 4 and connected by a connecting rod. The U-shaped frame 68 is rotatably connected with an adjusting rod 69 at the end close to the pull frame 67. The adjusting rod 69 is threadedly installed on the pull frame 67.

[0039] The overall aperture adjusting mechanism comprises a telescopic rod 610 fixedly connected with both ends of the first screen plate 63, the telescopic rod 610 being slidingly installed on the pull frame 67, the other end of the telescopic rod 610 being fixedly connected with a rack 611, the rack 611 being provided with a fixed block 612 on one side, the rack 611 being slidingly installed on the fixed block 612, the fixed block 612 being fixedly installed on the horizontal plate 3, a moving rod 613 being slidingly connected to the fixed block 612, the moving rod 613 being fixedly connected with a gear 614 matched with the rack 611, and a moving block 615 being slidingly connected to the inside of the fixed block 612, the top of the moving block 615 being provided with a first spring 616, the first spring 616 being sleeved on the top of the moving rod 613, in the embodiment of the present application, the screen frame 65, the first screen plate 63 and the second screen plate 64 can be slid outward on the mounting frame 61 by pulling the pull frame 67 until the screen frame 65, the first screen plate 63 and the second screen plate 64 are completely separated from the mounting frame 61 and the box body 4, and the screen frame 65, the first screen plate 63 and the second screen plate 64 can be replaced as a whole;

[0040] By rotating the adjusting rod 69, the adjusting rod 69 drives the U-shaped frame 68 to move, the U-shaped frame 68 drives the sliding bar 66 to move on the drive gear, and the U-shaped frame 68 can drive the second screen plate 64 to move on the screen frame 65, so as to adjust the positional relationship between the second screen plate 64 and the first screen plate 63, the change of the diameter of the through hole is realized by the misalignment of the through holes on the first screen plate 63 and the second screen plate 64, the diameter of the through hole can be quickly adjusted, the adjustment of the diameter of the through hole can be realized without stopping, the diameter of the through hole can be dynamically adjusted during the screening process, the problem that the traditional device needs to be stopped and replaced with different screen specifications is avoided, the adjustment efficiency is higher, and the adjustment is more convenient;

[0041] The telescopic rod 610 is arranged, so that the screening assembly 7 drives the mounting frame 61, the screen frame 65, the first screen plate 63 and the second screen plate 64 to screen the dolomite particles without being affected;

[0042] When it is necessary to synchronously adjust the through holes between all the first screen plates 63 and the second screen plates 64, the moving rod 613 is moved upward, the moving rod 613 drives the moving block 615 and the gear 614 to move upward, the gear 614 is engaged with the rack 611, the moving rod 613 is rotated, the moving rod 613 drives the gear 614 to rotate, the gear 614 drives the rack 611 to move, the rack 611 drives the telescopic rod 610 and the first screen plate 63 on the screen frame 65 to move, so as to adjust the positional relationship between the first screen plate 63 and the second screen plate 64, the moving rod 613 is fixed on the horizontal plate 3 by bolts, the adjustment of the diameter of the through hole is realized, the size of the discharged dolomite particles can be controlled, the multiple groups of through holes are synchronously adjusted, the appropriate discharge through hole diameter is selected, and multiple screening levels can be realized.

[0043] When the screen frame 65, the first screen plate 63 and the second screen plate 64 need to be taken out, the restriction of the bolt on the moving rod 613 is released, the gear 614 is pushed to move downward under the elastic force of the first spring 616, so that the gear 614 is no longer engaged with the rack 611 to drive, and then the screen frame 65, the first screen plate 63 and the second screen plate 64 can be taken out.

[0044] Please refer to Figure 4 、 Figure 5 The screening assembly 7 comprises a plurality of fixed frames 71 fixedly installed at two ends outside the box body 4, and the fixed frames 71 are located at positions corresponding to the plurality of screening plates 6 one by one. Two slide rods 72 are slidably connected to the fixed frames 71, one end of the slide rod 72 is fixedly connected to the outer wall of the screening plate 6, the second spring 73 is arranged between the screening plate 6 and the fixed frame 71, and the second spring 73 is sleeved on the slide rod 72. The top of one side of the fixed frame 71 is fixedly connected with a driving motor 74, the output end of the driving motor 74 is fixedly connected with a driving rod 75, the outer wall of the driving rod 75 is fixedly connected with a protruding block 76, the protruding block 76 corresponds to the position of the screening plate 6, in the embodiment of the present application, the driving motor 74 is turned on to drive the driving rod 75 to rotate, the driving rod 75 drives the protruding block 76 to rotate, so that the protruding block 76 is matched with the slide rod 72 and the second spring 73 on both sides in the rotating process, so that the screening plate 6 is horizontally moved on the box body 4, so that the screening plate 6 continuously moves back and forth to screen and process the dolomite particles.

[0045] Please refer to Figure 5 、 Figure 9The buffer assembly 8 comprises guide plates 81 fixedly installed on both sides of the bottom of the mounting frame 61, and the two guide plates 81 are arranged in an inclined manner, and a conical buffer seat 82 is arranged below the two guide plates 81, and the two ends of the conical buffer seat 82 are fixedly connected with a moving seat 83, and the moving seat 83 is slidably connected with a guide rail 84, and the guide rail 84 is fixedly installed on the inner wall of the box body 4 through a connecting seat, and the third spring 85 is arranged between the connecting seat and the moving seat 83, and the third spring 85 is sleeved on the guide rail 84. In the embodiment of the present application, the guide plate 81 has a certain elasticity, the dolomite particles screened out through the screening plate 6 fall on the guide plate 81, and then fall on the conical buffer seat 82 through the guide plate 81, and the conical buffer seat 82 slides downward along the guide rail 84 by means of the moving seat 83 after being impacted by the dolomite particles, and the dolomite particles are scattered at a low speed to the next layer of the screening plate 6 after being buffered by the conical buffer seat 82, at this time, the third spring 85 is compressed and has an upward force on the moving seat 83, thereby providing an upward buffering force on the conical buffer seat 82. When the feeding is finished, the conical buffer seat 82 and the moving seat 83 are restored to the natural state under the action of the third spring 85, and the buffering process is repeated and circulated with the feeding, thereby continuously buffering the dolomite particles, the buffering assembly 8 reduces the impact force of the dolomite particles and reduces the damage to the screening plate 6, and the impact force of the dolomite particles when falling on the screening plate 6 can be effectively controlled, thereby preventing the problem that the screening plate 6 is damaged due to the excessive impact force of the dolomite particles during the feeding process, and realizing the safe feeding of the dolomite particles.

[0046] The working principle of the dolomite opening and using multi-particle size classification screening box is as follows:

[0047] First step: before feeding, the upper electromagnetic iron is powered off, the electromagnetic iron loses magnetism, and the baffle 43 moves downward to the limiting groove and is attracted to the bottom of the baffle 43 under the action of the self weight of the baffle 43, and then the dolomite particles that need to be screened are manually added from the feeding box 5 into the box body 4;

[0048] Second step: the driving rod 75 is driven to rotate by starting the driving motor 74, the driving rod 75 drives the protruding block 76 to rotate, so that the protruding block 76 rotates in cooperation with the slide rods 72 and the second springs 73 on both sides to make the screening plate 6 move in the horizontal direction on the box body 4, so that the screening plate 6 continuously moves back and forth to screen the dolomite particles;

[0049] Third step: The dolomite particles screened out by the screening plate 6 fall on the guide plate 81, and then fall on the conical buffer seat 82 through the guide plate 81. After the conical buffer seat 82 is impacted by the dolomite particles, the moving seat 83 slides downward along the guide rail 84. After the dolomite particles are buffered by the conical buffer seat 82, they are scattered at low speed to the next layer of the screening plate 6. At this time, the third spring 85 is compressed and has an upward force on the moving seat 83, thereby providing an upward buffering force on the conical buffer seat 82. When the feeding is completed, the conical buffer seat 82 and the moving seat 83 are restored to the natural state under the action of the third spring 85. This buffering process is repeated in a cycle with the feeding, thereby continuously buffering the dolomite particles. The buffering assembly 8 reduces the impact force of the dolomite particles and reduces the damage to the screening plate 6. The impact force of the dolomite particles when falling on the screening plate 6 can be effectively controlled, thereby preventing the damage of the screening plate 6 caused by excessive impact force of the dolomite particles during the feeding process, and realizing the safe feeding of the dolomite particles.

[0050] Fourth step: The baffle 43 is manually pushed upward, and the lower electromagnet is de-energized while the upper electromagnet is energized. At this time, the baffle 43 is attracted to the upper electromagnet. When the discharge chute 41 is opened and the hydraulic telescopic cylinder 25 is started, the output end of the hydraulic telescopic cylinder 25 drives the box body 4 to tilt to the front end side, so that the dolomite particles screened on the screening plate 6 are discharged and collected.

[0051] When it is necessary to replace the screen frame 65, the first screen plate 63 and the second screen plate 64, the screen frame 65, the first screen plate 63 and the second screen plate 64 are slid outward on the mounting frame 61 by pulling the pull frame 67 until they are completely separated from the mounting frame 61 and the box body 4. The screen frame 65, the first screen plate 63 and the second screen plate 64 can be replaced as a whole.

[0052] When it is necessary to adjust the hole diameter of the single screening plate 6, the adjusting rod 69 is rotated to drive the U-shaped frame 68 to move, and the U-shaped frame 68 drives the slide bar 66 to move on the driving gear, and the U-shaped frame 68 drives the second screen plate 64 to move on the screen frame 65, so as to adjust the positional relationship between the second screen plate 64 and the first screen plate 63. The hole diameter can be quickly adjusted by using the misalignment of the through holes on the first screen plate 63 and the second screen plate 64. The hole diameter can be adjusted without stopping the machine, and the hole diameter can be dynamically adjusted during the screening process, avoiding the problem of stopping the machine to replace different screen specifications in traditional devices. The adjusting efficiency is high, and the adjusting is simple.

[0053] When it is needed to synchronously adjust the through holes between the first screen plate 63 and the second screen plate 64: by moving the moving rod 613 upward, the moving rod 613 drives the moving block 615 and the gear 614 to move upward, so that when the gear 614 is engaged with the rack 611, the moving rod 613 is rotated, the moving rod 613 drives the gear 614 to rotate, the gear 614 drives the rack 611 to move, so that the rack 611 drives the telescopic rod 610 and the first screen plate 63 on the screen frame 65 to move, thereby adjusting the positional relationship between the first screen plate 63 and the second screen plate 64, and then the moving rod 613 is fixed on the horizontal plate 3 by bolts, the adjustment of the diameter specification of the through hole is realized, thereby the size of the discharged dolomite particles can be controlled, and by synchronously adjusting the multiple groups of through hole diameters, the appropriate discharge through hole diameter is selected, thereby the multi-stage screening can be realized.

[0054] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dolomite ore processing multi-particle size classification screening box, comprising a base (1) and a box (4), characterized in that: The base (1) is provided with an adjusting assembly (2) between the base (1) and the box (4), both sides of the box (4) are fixedly connected with a horizontal plate (3), the top of the box (4) is fixedly connected with a feeding box (5), the inside of the box (4) is provided with a plurality of screening plates (6) from top to bottom, both sides of the screening plate (6) are provided with a screening assembly (7), and the bottom of the screening plate (6) is provided with a buffer assembly (8). The screening plate (6) comprises an installation frame (61) slidably installed on the box (4), a sliding groove (62) is formed in the inner side end of the installation frame (61), a screen frame (65) is slidably connected in the sliding groove (62), a first screen plate (63) and a second screen plate (64) are slidably arranged on the inner side end of the screen frame (65), the first screen plate (63) is located above the second screen plate (64), and the first screen plate (63) and the second screen plate (64) are slidably arranged between the first screen plate (63) and the second screen plate (64), one end of the screen frame (65) is fixedly connected with a pull frame (67), one end of the second screen plate (64) is fixedly connected with a U-shaped frame (68), one end of the U-shaped frame (68) is provided with a single aperture adjusting mechanism, and both sides of the U-shaped frame (68) are provided with a total aperture adjusting mechanism. The single aperture adjusting mechanism comprises a sliding bar (66) fixedly installed at both ends of the U-shaped frame (68) and slidably installed on the pull frame (67), the bottom of the sliding bar (66) is engagedly connected with a drive gear, two drive gears are rotatably installed on the box (4) and connected through a connecting rod, and the U-shaped frame (68) is rotatably connected with an adjusting rod (69) at one end close to the pull frame (67). The total aperture adjusting mechanism comprises a telescopic rod (610) fixedly connected with both ends of the first screen plate (63) and slidably installed on the pull frame (67), the other end of the telescopic rod (610) is fixedly connected with a rack (611), one side of the rack (611) is provided with a fixed block (612), the rack (611) is slidably installed on the fixed block (612), the fixed block (612) is fixedly installed on the horizontal plate (3), a moving rod (613) is slidably connected to the fixed block (612), the moving rod (613) is fixedly connected with a gear (614) matched with the rack (611), a moving block (615) is slidably connected to the inside of the fixed block (612), and a first spring (616) is arranged on the top of the moving block (615) and sleeved on the top of the moving rod (613).

2. A multi-particle size classification screening bin for dolomite mining according to claim 1, characterized in that: The front end surface of the box (4) is provided with a discharge chute (41), the bottom of the discharge chute (41) is fixedly connected with a discharge plate (42), and the discharge chute (41) is slidably connected with a baffle (43).

3. A multi-particle size classification screening bin for dolomite mining according to claim 1, characterized in that: The adjusting assembly (2) comprises a supporting block (21), a fixing seat (22), a rotating rod (23), a rotating seat (24) and a hydraulic telescopic cylinder (25), the fixing seat (22) is fixedly installed at the top of the front end of the base (1), the rotating rod (23) is rotatably installed at the top of the fixing seat (22), the rotating seat (24) is rotatably installed on the rotating rod (23), and the top of the rotating seat (24) is fixedly connected with the bottom of the box body (4), the two supporting blocks (21) are fixedly installed at the top of the rear end of the base (1) on both sides, and the hydraulic telescopic cylinder (25) is arranged between the two supporting blocks (21), the hydraulic telescopic cylinder (25) is rotatably installed at the top of the base (1), and the output end of the hydraulic telescopic cylinder (25) is rotatably connected with the bottom of the box body (4).

4. The multi-particle size classification screening bin for dolomite mining according to claim 1, characterized in that: The through holes on the first sieve plate (63) and the second sieve plate (64) are sequentially reduced from top to bottom, and the lowermost first sieve plate (63) and the second sieve plate (64) are not provided with through holes.

5. The multi-particle size classification screening bin for dolomite mining according to claim 1, characterized in that: The screening assembly (7) comprises a plurality of fixed frames (71) fixedly installed at both ends of the outer side of the box body (4), and the fixed frames (71) are located at positions corresponding to the plurality of screening plates (6), the fixed frame (71) is slidably connected with two slide rods (72), one end of the slide rod (72) is fixedly connected with the outer wall of the screening plate (6), the second spring (73) is arranged between the screening plate (6) and the fixed frame (71), and the second spring (73) is sleeved on the slide rod (72), the top of the fixed frame (71) on one side is fixedly connected with a driving motor (74), the output end of the driving motor (74) is fixedly connected with a driving rod (75), the outer wall of the driving rod (75) is fixedly connected with a protruding block (76), and the protruding block (76) and the screening plate (6) are correspondingly arranged.

6. A multi-particle size classification screening bin for dolomite mining according to claim 1, characterized in that: The buffering assembly (8) comprises guide plates (81) fixedly installed at the bottom of the mounting frame (61) on both sides, and the two guide plates (81) are inclinedly arranged, a conical buffering seat (82) is arranged below the two guide plates (81), the two ends of the conical buffering seat (82) are fixedly connected with a moving seat (83), a guide rail (84) is slidably connected with the moving seat (83), the guide rail (84) is fixedly installed on the inner wall of the box body (4) through a connecting seat, a third spring (85) is arranged between the connecting seat and the moving seat (83), and the third spring (85) is sleeved on the guide rail (84).

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