Multistage screening device for inorganic salt production

Abstract

The invention relates to the technical field of inorganic salt screening, in particular to an inorganic salt production multistage screening device which comprises a base, a limiting ring is arranged on the base, a screening basket is slidably arranged in the limiting ring, the outer wall of the upper end of the screening basket is slidably arranged in a material limiting ring, and a grinding basket is installed at the upper end of the inner wall of the material limiting ring; a grinding mechanism is mounted on the mounting frame, a rotating mechanism is arranged on the inner wall of the grinding basket, an anti-blocking mechanism is arranged on the inner wall of the limiting ring, and a screening mechanism is mounted in the screening basket. Through the grinding mechanism, when inorganic salt is ground, a first anti-blocking ejector pin and a first screening hole are matched, and the situation of blocking is avoided while grinding is achieved; and inorganic salt particles can be pressed into second screening holes more quickly through vertical reciprocating motion of the screening mechanism and the screening basket, and through cooperation of lifting motion of the screening basket, the anti-blocking mechanism and the scattering mechanism, cooperation of second anti-blocking ejector pins and the second screening holes can be achieved, and the bonded particles are scattered.

Description

Technical Field

[0001] The invention relates to the technical field of inorganic salt screening, in particular to a multi-stage screening device for inorganic salt production. Background Art

[0002] Inorganic salt screening devices are mainly used to grade and screen inorganic salts to meet the different requirements of inorganic salt particle size and purity in different fields. Through screening, impurities and particles that do not meet the particle size requirements in inorganic salts can be removed, thereby improving the purity and consistency of the product and meeting the market demand for high-quality inorganic salts. In the chemical industry, fine-grained inorganic salts are easier to dissolve and react. In the building materials field, coarse-grained inorganic salts may be more suitable as filling materials. Therefore, through screening, the performance of inorganic salts can be optimized to make them more in line with the needs of specific applications.

[0003] When existing equipment is screening inorganic salts, the particles in the inorganic salts are easily clogged in the screening holes of the screening mesh, which will affect the service life of the equipment and is not conducive to improving work efficiency. In addition, when screening fine inorganic salt particles, since the fine inorganic salt particles are light in volume and small in mass, and the small particles are easy to stick together, it is not easy to pass through the screen for screening quickly, which will reduce work efficiency and easily cause blockage, which is not conducive to the service life of the equipment.

[0004] Based on this, a multi-stage screening device for producing inorganic salts is now provided, which can eliminate the disadvantages of existing devices. Summary of the Invention

[0005] In response to the above problems, a multi-stage screening device for inorganic salt production is provided, which solves the problems of particles clogging in screening holes and low screening efficiency of fine particles through an anti-blocking mechanism and a screening mechanism.

[0006] In order to solve the problems of the existing technology, the present invention provides a multi-stage screening device for inorganic salt production, comprising a base, a limiting ring being provided on the base, a screening basket being slidably provided inside the limiting ring, the outer wall of the upper end of the screening basket being slidably arranged inside the limiting ring, a grinding basket being installed on the upper end of the inner wall of the limiting ring, a mounting frame being fixedly mounted on the base, a grinding mechanism being installed on the mounting frame, a rotating mechanism being provided on the inner wall of the grinding basket, an anti-blocking mechanism being provided on the inner wall of the limiting ring, and a screening mechanism being installed in the screening basket.

[0007] Preferably, the grinding mechanism includes a driving motor, a connecting plate, a mounting block, a grinding roller, a first anti-blocking pin, a first screening hole and a receiving rod. The driving motor is mounted on the bottom wall of the mounting frame, the output end of the driving motor is connected to the connecting plate, the mounting blocks are symmetrically mounted at both ends of the connecting plate, the side walls of the mounting blocks are rotatably mounted with grinding rollers, a plurality of first anti-blocking pins are provided on the grinding roller, a plurality of first screening holes are provided on the bottom wall of the grinding basket, the first anti-blocking pins and the first screening holes are pushed and fitted, the other end of the grinding roller is rotatably fitted with the inner wall of the grinding basket, the two ends of the receiving rod are respectively connected to the side wall of the mounting block and the side wall of the grinding roller close to one end of the grinding basket, and a rotating mechanism is provided in the grinding basket.

[0008] Preferably, the rotating mechanism includes a bevel gear ring, a bevel gear and a mounting sleeve. The bevel gear ring is fixedly mounted on the inner wall of the grinding basket. The grinding roller is provided with a mounting sleeve on the side wall near one end of the grinding basket. The outer wall of the mounting sleeve is provided with a bevel gear, and the bevel gear ring is meshed with the bevel gear.

[0009] Preferably, the anti-blocking mechanism includes a support ring frame, a second anti-blocking pin, a support column and a second screening hole. The support ring frame is fixedly mounted on the inner wall of the limiting ring. A plurality of second anti-blocking pins are provided on the support ring frame. The support ring frames are connected by support columns. A plurality of second screening holes are provided on the bottom wall of the screening basket. The second anti-blocking pins are pushed and fitted with the second screening holes.

[0010] Preferably, the screening mechanism includes a sleeve, a reciprocating screw, a fixed block, a limit block and a connecting shaft, the limit block is fixedly installed in the middle position of the bottom wall of the grinding basket, the top wall of the limit block is connected to the bottom wall of the connecting plate, one end of the reciprocating screw passes through the bottom wall of the grinding basket and is connected to the bottom wall of the limit block, the fixed block is fixedly installed on the bottom wall of the screening basket, a sleeve is fixedly installed inside the fixed block, the sleeve slides with the outer wall of the reciprocating screw, a thread is provided inside the sleeve that cooperates with the reciprocating screw, the other end of the reciprocating screw passes through the bottom wall of the screening basket and is connected to the connecting shaft, the other end of the connecting shaft is rotatably cooperated with the inner wall of the storage basket, the storage basket is arranged in the limit ring, and a breaking mechanism is symmetrically provided on the side wall of the sleeve.

[0011] Preferably, the scattering mechanism includes a pinion, a rack, a scattering connecting rod and a scattering rod, a scattering connecting rod is symmetrically rotatably installed on the inner wall of the material limiting ring, a scattering connecting rod is symmetrically provided with a receiving groove that slides with the scattering connecting rod on the side wall of the screening basket, the scattering connecting rod is arranged in the screening basket, and a plurality of scattering rods are symmetrically provided on the side wall of the scattering connecting rod, a rack is fixedly installed on the inner wall of the fixed block, the rack is meshed with the pinion, and the pinion is sleeved on the side wall of the scattering connecting rod close to one end of the fixed block, a limiting groove that slides with the scattering connecting rod is provided on the side wall of the fixed block, and a rubber stopper is installed on the side wall of the limiting groove.

[0012] Preferably, the limiting ring is symmetrically provided with a sliding groove, the side wall of the limiting ring is symmetrically provided with a support block, the other end of the support block is fixedly connected to the inner wall of the mounting frame, the side wall of the limiting ring is symmetrically provided with a sliding plate, the sliding plate is slidably arranged on the inner wall of the sliding groove, a first rotating door is rotatably provided on the side wall of the base, a second rotating door is rotatably provided on the limiting ring, handles are installed on the second rotating door and the first rotating door, and the screening basket is provided with a discharge trough corresponding to the second rotating door.

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

[0014] 1. The present invention provides a grinding mechanism, which enables the first anti-blocking ejector pin and the first screening hole to cooperate with each other while grinding the inorganic salt, thereby avoiding blockage while achieving grinding, thereby avoiding unnecessary damage to the equipment.

[0015] 2. The present invention sets a screening mechanism and drives the screening basket to move up and down, so that the inorganic salt particles can be pressed into the second screening hole more quickly, thereby improving the screening efficiency. The lifting movement of the screening basket cooperates with the anti-blocking mechanism and the breaking up mechanism, so that the second anti-blocking ejector pin and the second screening hole can cooperate and break up the bonded particles, thereby avoiding blockage and improving the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural diagram of a multi-stage screening device for producing inorganic salts.

[0017] Figure 2 This is a schematic diagram of the installation and decomposition of a multi-stage screening device for inorganic salt production Figure 1 .

[0018] Figure 3 This is a schematic diagram of the installation and decomposition of a multi-stage screening device for inorganic salt production Figure 2 .

[0019] Figure 4 A schematic diagram of the partial three-dimensional structure of a multi-stage screening device for inorganic salt production Figure 1 .

[0020] Figure 5 A schematic diagram of the partial three-dimensional structure of a multi-stage screening device for inorganic salt production Figure 2 .

[0021] The numbers in the figure are: 101, base; 102, mounting frame; 103, first rotating door; 104, second rotating door; 105, limiting ring; 106, storage basket; 107, grinding basket; 108, screening basket; 109, limiting ring; 110, sliding groove; 111, sliding plate; 112, supporting block; 113, discharge chute; 114, receiving chute; 115, limiting groove; 200, grinding mechanism; 201, driving motor; 202, connecting plate; 203, mounting block; 204, grinding roller; 205, first anti-blocking ejector pin; 206 , first screening hole; 207, receiving rod; 300, rotating mechanism; 301, bevel gear ring; 302, bevel gear; 303, mounting sleeve; 400, anti-blocking mechanism; 401, supporting ring frame; 402, second anti-blocking ejector pin; 403, supporting column; 404, second screening hole; 500, screening mechanism; 501, sleeve; 502, reciprocating screw rod; 503, fixing block; 504, limiting block; 505, connecting shaft; 600, breaking up mechanism; 601, pinion; 602, rack; 603, breaking up connecting rod; 604, breaking up rod. DETAILED DESCRIPTION

[0022] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Reference Figure 1-Figure 5 : A multi-stage screening device for inorganic salt production, comprising a base 101, a limiting ring 105 being provided on the base 101, a screening basket 108 being slidingly provided inside the limiting ring 105, the outer wall of the upper end of the screening basket 108 being slidingly provided inside the limiting ring 109, a grinding basket 107 being installed on the upper end of the inner wall of the limiting ring 109, a mounting frame 102 being fixedly mounted on the base 101, a grinding mechanism 200 being installed on the mounting frame 102, a rotating mechanism 300 being provided on the inner wall of the grinding basket 107, an anti-blocking mechanism 400 being provided on the inner wall of the limiting ring 105, and a screening mechanism 500 being installed in the screening basket 108.

[0024] The grinding mechanism 200 is used to grind large particles of inorganic salts, which can avoid blockage during grinding and increase the service life of the equipment. Through the cooperation of the anti-blocking mechanism 400 and the screening mechanism 500, blockage can be avoided during screening, which improves work efficiency while avoiding equipment damage and increasing production costs.

[0025] Reference Figure 4-Figure 5The grinding mechanism 200 includes a driving motor 201, a connecting plate 202, a mounting block 203, a grinding roller 204, a first anti-blocking ejector pin 205, a first screening hole 206 and a receiving rod 207. The driving motor 201 is mounted on the bottom wall of the mounting frame 102. The output end of the driving motor 201 is connected to the connecting plate 202. The mounting blocks 203 are symmetrically mounted on both ends of the connecting plate 202. The side walls of the mounting blocks 203 are rotatably mounted with grinding rollers 204. A plurality of first anti-blocking pins 205 are provided on the rolling roller 204, and a plurality of first screening holes 206 are provided on the bottom wall of the grinding basket 107. The first anti-blocking pins 205 and the first screening holes 206 are pushed together, and the other end of the rolling roller 204 is rotatably matched with the inner wall of the grinding basket 107. The two ends of the receiving rod 207 are respectively connected to the side wall of the mounting block 203 and the side wall of one end of the rolling roller 204 close to the grinding basket 107. A rotating mechanism 300 is provided in the grinding basket 107.

[0026] Start the driving motor 201 to drive the connecting plate 202 to rotate, and the connecting plate 202 drives the rolling roller 204 and the first anti-blocking ejector pin 205 to rotate. During the rotation of the rolling roller 204, large particles of inorganic salt can be ground and crushed. Through the cooperation of the rotating mechanism 300, the rolling roller 204 can rotate and rotate at the same time. During the rotation, the first anti-blocking ejector pin 205 can cooperate with the first sieve hole 206 and push the particles blocked at the first sieve hole 206 to avoid the first sieve hole 206 being blocked and affecting the service life of the equipment.

[0027] Reference Figure 4-Figure 5 : The rotating mechanism 300 includes a bevel gear ring 301, a bevel gear 302 and a mounting sleeve 303. The bevel gear ring 301 is fixedly installed on the inner wall of the grinding basket 107. The grinding roller 204 is provided with a mounting sleeve 303 on the side wall near one end of the grinding basket 107. The outer wall of the mounting sleeve 303 is provided with a bevel gear 302, and the bevel gear ring 301 is engaged with the bevel gear 302.

[0028] The rotation of the laminating roller 204 drives the bevel gear 302 to rotate on the bevel gear ring 301 , and the rotation of the bevel gear ring 301 can drive the laminating roller 204 and the first anti-blocking ejector pin 205 to rotate.

[0029] Reference Figure 4-Figure 5 : The anti-blocking mechanism 400 includes a support ring frame 401, a second anti-blocking ejector pin 402, a support column 403 and a second screening hole 404. The support ring frame 401 is fixedly installed on the inner wall of the limit ring 105. The support ring frame 401 is provided with a plurality of second anti-blocking ejector pins 402. The support ring frames 401 are connected by support columns 403. The bottom wall of the screening basket 108 is provided with a plurality of second screening holes 404. The second anti-blocking ejector pins 402 are pushed and fitted with the second screening holes 404.

[0030] The screening basket 108 moves up and down. When the screening basket 108 moves downward, the second anti-blocking ejector pin 402 cooperates with the second screening hole 404 to push out the particles blocked in the second screening hole 404, thereby preventing the second screening hole 404 from being blocked and affecting the screening efficiency. The support ring frame 401 and the support column 403 are used to support the second anti-blocking ejector pin 402.

[0031] Reference Figure 4-Figure 5 The screening mechanism 500 includes a sleeve 501, a reciprocating screw rod 502, a fixed block 503, a limit block 504 and a connecting shaft 505. The limit block 504 is fixedly installed in the middle position of the bottom wall of the grinding basket 107. The top wall of the limit block 504 is connected to the bottom wall of the connecting plate 202. One end of the reciprocating screw rod 502 passes through the bottom wall of the grinding basket 107 and connects to the bottom wall of the limit block 504. The fixed block 503 is fixedly installed on the bottom wall of the screening basket 108. The fixed block 504 is fixedly installed on the bottom wall of the screening basket 108. 03 has a sleeve 501 fixedly installed inside, and the sleeve 501 is slidably matched with the outer wall of the reciprocating screw rod 502. The sleeve 501 is provided with a thread inside to match the reciprocating screw rod 502. The other end of the reciprocating screw rod 502 passes through the bottom wall of the screening basket 108 and is connected to the connecting shaft 505. The other end of the connecting shaft 505 is rotatably matched with the inner wall of the storage basket 106. The storage basket 106 is arranged in the limiting ring 105. The side wall of the sleeve 501 is symmetrically provided with a breaking up mechanism 600.

[0032] The rotation of the connecting plate 202 can drive the reciprocating screw 502 to rotate. Through the cooperation between the reciprocating screw 502 and the thread inside the sleeve 501, the sleeve 501 can be reciprocated up and down. The sleeve 501 can drive the fixed block 503 and the screening basket 108 to reciprocate up and down. The up and down movement of the screening basket 108 can screen the inorganic salt particles in the screening basket 108.

[0033] Reference Figure 5 : The scattering mechanism 600 includes a pinion 601, a rack 602, a scattering connecting rod 603 and a scattering rod 604. The scattering connecting rod 603 is symmetrically rotatably installed on the inner wall of the material limiting ring 109. The side wall of the screening basket 108 is symmetrically provided with a receiving groove 114 that slides with the scattering connecting rod 603. The scattering connecting rod 603 is arranged in the screening basket 108. Several scattering rods 604 are symmetrically provided on the side wall of the scattering connecting rod 603. A rack 602 is fixedly installed on the inner wall of the fixed block 503. The rack 602 meshes with the pinion 601. The pinion 601 is sleeved on the side wall of the scattering connecting rod 603 near one end of the fixed block 503. The side wall of the fixed block 503 is provided with a limiting groove 115 that slides with the scattering connecting rod 603, and a rubber stopper is installed on the side wall of the limiting groove 115.

[0034] When the screening basket 108 moves downward, it can drive the rack 602 to move downward, and the rack 602 drives the pinion 601 to rotate. The rotation of the pinion 601 drives the breaking connecting rod 603 and the breaking rod 604 to rotate, which can break up the sticky small particles and avoid the phenomenon of sticking and clogging.

[0035] Reference Figure 1-Figure 3 : The limiting ring 109 is symmetrically provided with a sliding groove 110, and the side wall of the limiting ring 109 is symmetrically provided with a support block 112, the other end of the support block 112 is fixedly connected to the inner wall of the mounting frame 102, and the side wall of the limiting ring 109 is symmetrically provided with a sliding plate 111, and the sliding plate 111 is slidably set on the inner wall of the sliding groove 110, a first rotating door 103 is rotatably provided on the side wall of the base 101, and a second rotating door 104 is rotatably provided on the limiting ring 109, and handles are installed on the second rotating door 104 and the first rotating door 103, and the screening basket 108 is provided with a discharge trough 113 corresponding to the second rotating door 104.

[0036] Pull the handle to open the first rotating door 103 and the second rotating door 104, and the screened inorganic salt can be taken out. The staff can use tools to take out the internal inorganic salt and store it. The discharge chute 113 is convenient for the staff to take out the material.

[0037] Here’s how it works:

[0038] S1. Pour the inorganic salt to be ground and screened into the grinding basket 107, start the drive motor 201, drive the connecting plate 202 to rotate, and the connecting plate 202 drives the grinding roller 204 and the first anti-blocking ejector pin 205 to rotate. During the rotation of the grinding roller 204, large particles of inorganic salt can be ground into powder;

[0039] S2. The rolling roller 204 rotates to drive the bevel gear 302 to rotate on the bevel gear ring 301. The rotation of the bevel gear ring 301 can drive the rolling roller 204 and the first anti-blocking ejector pin 205 to rotate. During the rotation, the first anti-blocking ejector pin 205 can cooperate with the first sieve hole 206 and push away the particles blocked in the first sieve hole 206, thereby preventing the first sieve hole 206 from being blocked and affecting the service life of the equipment;

[0040] S3. The rotation of the connecting plate 202 can drive the reciprocating screw 502 to rotate. The reciprocating screw 502 cooperates with the thread inside the sleeve 501, which can realize the sleeve 501 to reciprocate up and down. The sleeve 501 can drive the fixed block 503 and the screening basket 108 to reciprocate up and down. The up and down movement of the screening basket 108 can screen the inorganic salt particles in the screening basket 108;

[0041] S4. The screening basket 108 moves up and down. When the screening basket 108 moves downward, the second anti-blocking ejector pins 402 cooperate with the second screening holes 404 to push out particles blocked in the second screening holes 404, thereby preventing the second screening holes 404 from being blocked and affecting the screening efficiency. The support ring frame 401 and the support columns 403 are used to support the second anti-blocking ejector pins 402.

[0042] S5. When the screening basket 108 moves downward, it can drive the rack 602 to move downward, and the rack 602 drives the pinion 601 to rotate. The rotation of the pinion 601 drives the breaking connecting rod 603 and the breaking rod 604 to rotate, which can break up the sticky small particles and avoid the phenomenon of sticking and clogging;

[0043] S6. Pull the handle to open the first rotating door 103 and the second rotating door 104 to take out the sieved inorganic salts. The staff can use tools to take out the internal inorganic salts and store them. The discharge chute 113 is convenient for the staff to take out the materials.

[0044] The above embodiments merely represent one or more embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the scope of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A multi-stage screening device for producing inorganic salts, characterized in that: The invention comprises a base (101), wherein a limiting ring (105) is provided on the base (101), a screening basket (108) is slidably provided inside the limiting ring (105), the outer wall of the upper end of the screening basket (108) is slidably provided inside a limiting ring (109), a grinding basket (107) is installed on the upper end of the inner wall of the limiting ring (109), a mounting frame (102) is fixedly installed on the base (101), a grinding mechanism (200) is installed on the mounting frame (102), a rotating mechanism (300) is provided on the inner wall of the grinding basket (107), an anti-blocking mechanism (400) is provided on the inner wall of the limiting ring (105), and a screening mechanism (500) is installed in the screening basket (108).

2. The multi-stage screening device for producing inorganic salts according to claim 1, characterized in that: The grinding mechanism (200) comprises a driving motor (201), a connecting plate (202), a mounting block (203), a grinding roller (204), a first anti-blocking ejector pin (205), a first screening hole (206) and a receiving rod (207); the driving motor (201) is mounted on the bottom wall of the mounting frame (102); the output end of the driving motor (201) is connected to the connecting plate (202); the mounting blocks (203) are symmetrically mounted at both ends of the connecting plate (202); the side walls of the mounting blocks (203) are rotatably mounted with grinding rollers (204); The rolling roller (204) is provided with a plurality of first anti-blocking pins (205), and the bottom wall of the grinding basket (107) is provided with a plurality of first sieving holes (206). The first anti-blocking pins (205) and the first sieving holes (206) are pushed together, and the other end of the rolling roller (204) is rotatably matched with the inner wall of the grinding basket (107). The two ends of the receiving rod (207) are respectively connected to the side wall of the mounting block (203) and the side wall of one end of the rolling roller (204) close to the grinding basket (107), and a rotating mechanism (300) is provided inside the grinding basket (107).

3. The multi-stage screening device for producing inorganic salts according to claim 2, characterized in that: The rotating mechanism (300) comprises a bevel gear ring (301), a bevel gear (302) and a mounting sleeve (303); the bevel gear ring (301) is fixedly mounted on the inner wall of the grinding basket (107); the mounting sleeve (303) is disposed on the side wall of one end of the grinding roller (204) close to the grinding basket (107); the bevel gear (302) is sleeved on the outer wall of the mounting sleeve (303); and the bevel gear ring (301) is meshed with the bevel gear (302).

4. The multi-stage screening device for producing inorganic salts according to claim 1, characterized in that: The anti-blocking mechanism (400) comprises a support ring frame (401), a second anti-blocking ejector pin (402), a support column (403) and a second screening hole (404); the support ring frame (401) is fixedly mounted on the inner wall of the limiting ring (105); a plurality of second anti-blocking ejector pins (402) are arranged on the support ring frame (401); the support ring frames (401) are connected via the support column (403); a plurality of second screening holes (404) are arranged on the bottom wall of the screening basket (108); the second anti-blocking ejector pins (402) are pushed and matched with the second screening holes (404).

5. The multi-stage screening device for producing inorganic salts according to claim 1, characterized in that: The screening mechanism (500) comprises a sleeve (501), a reciprocating screw rod (502), a fixed block (503), a limit block (504) and a connecting shaft (505); the limit block (504) is fixedly mounted at a middle position of the bottom wall of the grinding basket (107); the top wall of the limit block (504) is connected to the bottom wall of the connecting plate (202); one end of the reciprocating screw rod (502) passes through the bottom wall of the grinding basket (107) and is connected to the bottom wall of the limit block (504); the fixed block (503) is fixedly mounted on the bottom wall of the screening basket (108); the fixed block (504) is connected to the bottom wall of the connecting plate (202); A sleeve (501) is fixedly installed inside the sieve basket (503), and the sleeve (501) is slidably matched with the outer wall of the reciprocating screw rod (502). A thread that matches the reciprocating screw rod (502) is provided inside the sleeve (501). The other end of the reciprocating screw rod (502) passes through the bottom wall of the screening basket (108) and is connected to the connecting shaft (505). The other end of the connecting shaft (505) is rotatably matched with the inner wall of the storage basket (106). The storage basket (106) is arranged in the limiting ring (105). A breaking mechanism (600) is symmetrically provided on the side wall of the sleeve (501).

6. The multi-stage screening device for producing inorganic salts according to claim 5, characterized in that: The scattering mechanism (600) comprises a pinion (601), a rack (602), a scattering connecting rod (603) and a scattering rod (604); the scattering connecting rod (603) is symmetrically rotatably mounted on the inner wall of the limiting ring (109); a receiving groove (114) slidably matched with the scattering connecting rod (603) is symmetrically arranged on the side wall of the screening basket (108); the scattering connecting rod (603) is arranged in the screening basket (108); and the scattering connecting rod (603) is symmetrically arranged on the side wall. A plurality of breaking rods (604) are symmetrically arranged, a rack (602) is fixedly mounted on the inner wall of the fixed block (503), the rack (602) is meshed with a pinion (601), the pinion (601) is sleeved on the side wall of the breaking connecting rod (603) close to one end of the fixed block (503), a limiting groove (115) which is slidably matched with the breaking connecting rod (603) is arranged on the side wall of the fixed block (503), and a rubber stopper is installed on the side wall of the limiting groove (115).

7. The multi-stage screening device for producing inorganic salts according to claim 1, characterized in that: The limiting ring (109) is symmetrically provided with a sliding groove (110), the side wall of the limiting ring (109) is symmetrically provided with a supporting block (112), the other end of the supporting block (112) is fixedly connected to the inner wall of the mounting frame (102), the side wall of the limiting ring (109) is symmetrically provided with a sliding plate (111), the sliding plate (111) is slidably arranged on the inner wall of the sliding groove (110), the side wall of the base (101) is rotatably provided with a first rotating door (103), the limiting ring (109) is rotatably provided with a second rotating door (104), the second rotating door (104) and the first rotating door (103) are provided with handles, and the screening basket (108) is provided with a discharging trough (113) corresponding to the second rotating door (104).

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