Ammonium chloride particle material screening equipment

Abstract

The invention relates to the technical field of material screening, and discloses ammonium chloride particle material screening equipment which comprises a rotary material screening mechanism and a soft start type linkage mechanism. The horizontal rotating shaft can rotate along with a rotor of the driving motor and drive the screening roller to rotate, the eccentric block can rotate along with the horizontal rotating shaft and shake, the soft rope is used for enabling the horizontal rotating shaft to achieve soft starting along with the rotor, and the spiral spring is used for achieving the elastic supporting effect on the horizontal rotating shaft. According to the ammonium chloride particle material screening equipment, powdery ammonium chloride particles and blocky ammonium chloride particles can be continuously and circularly screened by controlling the rotating direction of the equipment, so that the effect of screening the ammonium chloride particle materials is improved, meanwhile, the screening roller can be in a continuous shaking state, and the screening efficiency is improved. Therefore, the screening efficiency of the ammonium chloride particle materials is improved.

Description

Technical Field

[0001] The invention relates to the technical field of material screening, in particular to ammonium chloride particle material screening equipment. Background Art

[0002] Ammonium chloride (chemical formula is NH4Cl) is the ammonium salt of hydrochloric acid, is a kind of white or slightly yellow crystalline powder, it is widely used in the basic fertilizer of producing compound fertilizer. However, powdered ammonium chloride is very easy to deliquesce, when the relative humidity in the air is greater than the hygroscopic point (about 76%), the ammonium chloride powder is easy to absorb moisture and agglomerate. Therefore, the ammonium chloride powder often needs to be sieved before use to separate the ammonium chloride block that absorbs moisture and agglomerates. One of the existing equipments for ammonium chloride screening is a rotary vibrating screen, which drives the screening mechanism to vibrate through a vibrating motor to realize the screening of ammonium chloride particles.

[0003] For example, a Chinese patent with publication number "CN218610394U" discloses "an ammonium chloride granular material screening device", whose main structure includes a base, a screening box, a spring, a screen, a guide plate, a vibration motor, a connecting rod and a counterweight. Among them: the bottom surface of the screening box is connected to the upper surface of the base through a spring support, and a feed port is fixed on the top surface of the screening box. The screen is fixed in the inner cavity of the screening box, and an upper discharge port is fixed on the side wall of the screening box corresponding to the screen. The guide plate is tilted and fixed in the inner cavity of the screening box and is located below the screen, and a lower discharge port is fixed on the side wall of the screening box at the lower end of the guide plate. The vibration motor is fixed on the bottom surface of the screening box. The upper end of the connecting rod is connected to the bottom surface of the screening box, and the lower end of the connecting rod is connected to the counterweight in the inner cavity of the base. The above-mentioned screening equipment can effectively reduce the center of gravity of the screening mechanism of the rotary vibrating screen, improve its regularity and stability during operation, and reduce failures.

[0004] However, when the above-mentioned ammonium chloride particle material screening equipment is actually working, the powdered ammonium chloride particles and the block ammonium chloride particles will be separated by the obliquely arranged screen, and some of the powdered ammonium chloride particles and the block ammonium chloride particles will fall into the same collecting shell due to insufficient screening time, which may easily cause insufficient screening effect. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an ammonium chloride granular material screening device. By controlling the rotation direction of the device, powdered ammonium chloride granules and block ammonium chloride granules can be continuously circulated and screened, thereby improving the effect of the ammonium chloride granular material after screening. At the same time, the device can make the screening drum in a state of continuous shaking, thereby improving the efficiency of the ammonium chloride granular material during screening, and solving the above-mentioned technical problems.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an ammonium chloride particle material screening device, comprising a motor fixing base with a motor installation cavity at the center, a driving motor fixedly installed in the motor installation cavity and a bottom supporting base for supporting the driving motor, and also comprising a rotating material screening mechanism, wherein a screening drum with a hollow interior capable of screening material particles is arranged inside, a spiral bar fixedly installed on the circumferential inner wall of the screening drum and capable of directing the movement of material particles when rotating, and a gravity-type feeding shell installed at one end of the screening drum through a bearing and used for feeding materials; and a soft-start linkage mechanism, wherein a horizontal rotating shaft capable of rotating with the rotor of the driving motor and driving the screening drum to rotate, an eccentric block capable of rotating with the horizontal rotating shaft and generating a shaking phenomenon, a soft rope for achieving soft starting of the horizontal rotating shaft with the rotor, and a spiral spring for achieving an elastic support effect on the horizontal rotating shaft are arranged inside.

[0007] Preferably, the rotating material screening mechanism includes a screening drum and a gravity feeding shell, a plurality of screening holes for separating materials are arranged at the circumferential wall thickness of the screening drum, three spiral bars in an annular array are fixed at the circumferential inner wall of the screening drum, the solid end of the screening drum is provided with a material input channel which is an integral structure with it and connected to the internal cavity of the screening drum, the interior of the gravity feeding shell is provided with an annular material reserved cavity installed on the periphery of the opening end of the material input channel through a bearing, the interior of the gravity feeding shell is provided with a conical feeding cavity with an open top and a bottom connected to the annular material reserved cavity, and one end of the gravity feeding shell is provided with an axis mounting hole connecting the external space and the annular material reserved cavity.

[0008] Preferably, the center of gravity of the gravity-type feeding housing is sufficient to maintain a vertical state with the opening end of the conical feeding cavity facing upward during operation.

[0009] Preferably, the soft-start linkage mechanism comprises a horizontal rotating shaft which passes through the inner cavity of the screening drum, the material input channel, the annular material reserved cavity and the shaft body mounting hole in sequence; the horizontal rotating shaft is fixedly mounted with an eccentric block on the shaft body located inside the screening drum; the horizontal rotating shaft is fixedly mounted with a fixed bracket on the shaft body located near the opening end of the screening drum, and the outer circumferential surface of the fixed bracket is fixedly mounted on the circumferential inner wall of the screening drum; the horizontal rotating shaft is fixedly mounted with a spiral conveying blade on the shaft body located inside the screening drum, the material input channel and the annular material reserved cavity; the horizontal rotating shaft is respectively mounted on a shaft through bearings on the shaft bodies near its two ends. A top support base is fixedly installed in the sleeve hole of the shaft mounting sleeve, and a No. 2 bottom support base is arranged directly below each of the top support bases, and a coil spring is fixedly installed between each of the top support bases and the No. 2 bottom support bases, and a No. 1 rotating disk is fixedly installed at one end of the horizontal rotating shaft located outside the gravity-type feeding shell, and a No. 2 rotating disk that moves with the rotor is arranged in an area away from the end surface of the No. 1 rotating disk, and three circular array-type soft ropes are fixedly installed between the No. 1 rotating disk and the No. 2 rotating disk, and after the No. 1 bottom support base and the No. 2 bottom support base are fixedly installed, the soft ropes are in a relaxed state.

[0010] Preferably, the center of the eccentric block is arranged on one side deviating from the axis of the horizontal rotating shaft.

[0011] Preferably, the spiral direction of the spiral conveying blade is opposite to the spiral direction of the spiral strip.

[0012] Preferably, it also includes a support height adjustment mechanism, which is internally provided with a No. 1 externally threaded rod and a No. 2 externally threaded rod fixedly connected to the No. 1 bottom support base and the end face of the motor fixed base, a longitudinal threaded sleeve threadedly connected to the No. 1 externally threaded rod and the No. 2 externally threaded rod and capable of changing the distance between the No. 1 externally threaded rod and the No. 2 externally threaded rod when rotating, and a polygonal limit rod inserted into the axis of the No. 1 externally threaded rod and the No. 2 externally threaded rod and capable of preventing the No. 1 externally threaded rod and the No. 2 externally threaded rod from rotating relative to each other.

[0013] Preferably, the support height adjustment mechanism includes a longitudinal threaded sleeve, a No. 1 externally threaded rod and a No. 2 externally threaded rod, one end of the longitudinal threaded sleeve is provided with a No. 1 internally threaded cavity with an inwardly concave structure, the other end of the longitudinal threaded sleeve is provided with a No. 2 internally threaded cavity with an inwardly concave structure, the rod body of the No. 1 externally threaded rod is installed inside the No. 1 internally threaded cavity through the No. 1 threaded structure, and the rod body of the No. 2 externally threaded rod is installed inside the No. 2 internally threaded cavity through the No. 2 threaded structure, the No. 1 externally threaded rod and the No. 2 externally threaded rod are provided with polygonal limiting cavities with inwardly concave structures at opposite ends, a polygonal limiting rod inserted into the polygonal limiting cavity is fixedly installed at the center of the longitudinal threaded sleeve, one end of the No. 1 externally threaded rod is provided with a No. 1 connecting plate which is integrally connected with it and fixedly connected to the upper end surface of the No. 1 bottom support base, and one end of the No. 2 externally threaded rod is provided with a No. 2 connecting plate which is integrally connected with it and fixedly connected to the bottom end of the motor fixed base.

[0014] Preferably, the structural shape of the polygonal limit cavity cross section is consistent with the structural shape of the polygonal limit rod cross section, both are polygonal structures, and the structural dimensions of the polygonal limit cavity cross section match the structural dimensions of the polygonal limit rod cross section.

[0015] Preferably, the No. 1 thread structure includes an internal thread structure arranged inside the No. 1 internal thread cavity and an external thread structure arranged on the No. 1 external thread rod body, and the No. 2 thread structure includes an internal thread structure arranged inside the No. 2 internal thread cavity and an external thread structure arranged on the No. 2 external thread rod body, and the spiral direction of the No. 1 thread structure is opposite to the spiral direction of the No. 2 thread structure.

[0016] Compared with the prior art, the present invention provides an ammonium chloride granular material screening device, which has the following beneficial effects:

[0017] By controlling the rotation direction of the equipment, powdered ammonium chloride particles and block ammonium chloride particles can be continuously circulated and screened, thereby improving the effect of the ammonium chloride particle material after screening. At the same time, the device can keep the screening drum in a state of continuous shaking, thereby improving the efficiency of the ammonium chloride particle material during screening. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A perspective view of the present invention;

[0019] Figure 2 is a three-dimensional cross-sectional view of the present invention;

[0020] Figure 3 It is a three-dimensional cross-sectional view of the rotary material screening mechanism of the present invention;

[0021] Figure 4It is a three-dimensional distribution diagram of three spiral strips in the present invention;

[0022] Figure 5 It is a three-dimensional cross-sectional view of the soft-start linkage mechanism of the present invention;

[0023] Figure 6 It is a three-dimensional distribution diagram of three soft ropes in the present invention;

[0024] Figure 7 It is a three-dimensional cross-sectional view of the support height adjustment mechanism of the present invention;

[0025] Figure 8 It is a three-dimensional diagram of the polygonal limiting rod in the present invention.

[0026] Among them: 1. Drive motor; 2. Motor fixing base; 3. Motor installation cavity; 4. Rotor; 5. No. 1 bottom support base; 6. Rotary material screening mechanism; 61. Screening drum; 62. Screening hole; 63. Material input channel; 64. Gravity feeding shell; 65. Conical feeding cavity; 66. Annular material reserved cavity; 67. Shaft installation hole; 68. Spiral strip; 7. Soft start linkage mechanism; 71. Horizontal rotating shaft; 72. Eccentric block; 73. Fixed bracket; 74. Spiral conveying blade; 75. Shaft installation Sleeve; 76, top support base; 77, spiral spring; 78, bottom support base No. 2; 79, rotating disk No. 1; 710, rotating disk No. 2; 711, soft rope; 8, support height adjustment mechanism; 81, longitudinal threaded sleeve; 82, internal thread cavity No. 1; 83, internal thread cavity No. 2; 84, thread structure No. 1; 85, thread structure No. 2; 86, external thread rod No. 1; 87, external thread rod No. 2; 88, connecting plate No. 1; 89, connecting plate No. 2; 810, polygonal limit cavity; 811, polygonal limit rod. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1 and Figure 2 , an ammonium chloride particle material screening equipment, including a motor fixing base 2 with a motor installation cavity 3 at the center, a driving motor 1 fixedly installed in the motor installation cavity 3, and a No. 1 bottom support base 5 for supporting the driving motor 1. The No. 1 bottom support base 5 and the No. 2 bottom support base 78 are fixedly installed in the workplace, and the rotor 4 and the horizontal rotating shaft 71 are on the same horizontal line.

[0029] To achieve rotary screening of ammonium chloride granules, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , it is necessary to set up a rotating material screening mechanism 6, which is provided with a screening drum 61 with a hollow interior and capable of screening material particles, a spiral strip 68 fixedly installed on the inner wall of the screening drum 61 and capable of directional movement of material particles when rotating, and a gravity feeding shell 64 installed at one end of the screening drum 61 through a bearing and used for feeding materials. The ammonium chloride particles are fed into the conical feeding cavity 65. Under the action of gravity, the material particles will accumulate in the annular material reserved cavity 66, and then the driving motor 1 is started, and the rotation direction of the rotor 4 is controlled. First, the rotor 4 needs to drive the spiral conveying blades 74 to drive the surrounding ammonium chloride particle materials. The direction is toward the inside of the screening drum 61. Since the spiral direction of the spiral conveying blade 74 is opposite to the spiral direction of the spiral bar 68, when the material enters the screening drum 61, under the action of the spiral bar 68, the material will continuously circulate toward the solid end of the screening drum 61, and the powdered ammonium chloride particles will fall downward through the screening holes 62, while the block ammonium chloride particles will be stored in the screening drum 61. After a single screening is completed, the drive motor 1 is controlled to reverse the rotor 4. At this time, the reversal of the spiral bar 68 will cause the block ammonium chloride particles located around it to be discharged outward through the open end of the screening drum 61, thereby achieving the screening effect of the ammonium chloride particles.

[0030] For the specific structure of the rotary material screening mechanism 6, please refer to Figure 3 and Figure 4 , including a screening drum 61 and a gravity-type feeding shell 64, wherein a plurality of screening holes 62 for separating materials are arranged at the circumferential wall thickness of the screening drum 61, and three spiral strips 68 in an annular array are fixed at the circumferential inner wall of the screening drum 61, and a material input channel 63 which is an integral structure with the screening drum 61 and communicates with the internal cavity of the screening drum 61 is arranged at the solid end of the screening drum 61, and an annular material reserved cavity 66 which is installed on the periphery of the opening end of the material input channel 63 through a bearing is arranged inside the gravity-type feeding shell 64, and a conical feeding cavity 65 which is open at the top and communicates with the annular material reserved cavity 66 at the bottom is arranged inside the gravity-type feeding shell 64, and an axial mounting hole 67 which communicates with the external space and the annular material reserved cavity 66 is arranged at one end of the gravity-type feeding shell 64, and the center of gravity of the gravity-type feeding shell 64 is sufficient to maintain a vertical state with the opening end of the conical feeding cavity 65 upward during operation.

[0031] To achieve soft start device linkage effect, please refer to Figure 1 , Figure 2 , Figure 5 and Figure 6 , it is necessary to set up a soft-start linkage mechanism 7, which is internally provided with a horizontal rotating shaft 71 that can rotate with the rotor 4 of the driving motor 1 and drive the screening drum 61 to rotate, an eccentric block 72 that can rotate with the horizontal rotating shaft 71 and generate a shaking phenomenon, a soft rope 711 used to make the horizontal rotating shaft 71 realize soft start with the rotor 4, and a spiral spring 77 used to realize an elastic support effect on the horizontal rotating shaft 71. The rotor 4 first drives the No. 2 rotating disk 710 to rotate. At this time, the three soft ropes 711 will be entangled with each other until the three soft ropes 711 drive the No. 1 rotating disk 79 to rotate, realizing soft start, and the rotation of the No. 1 rotating disk 79 It will drive the spiral conveying blade 74, the eccentric block 72 and the screening drum 61 to rotate, and at this time, the rotation of the eccentric block 72 will cause the force deviation between the screening drum 61 and the horizontal rotating shaft 71, so that the screening drum 61 and the horizontal rotating shaft 71 will shake, and the shaking will make the material inside the screening drum 61 move quickly, thereby accelerating the screening of the material, the spiral spring 77 can provide the necessary elastic support effect, and during the shaking process, the three soft ropes 711 can undergo corresponding deformation, and the drive motor 1 can remain in a stationary state and work normally, thereby reducing the damage to the drive motor 1 caused by the shaking.

[0032] For the specific structure of the soft start linkage mechanism 7, please refer to Figure 5 and Figure 6, comprising a horizontal rotating shaft 71 which sequentially passes through the inner cavity of the screening drum 61, the material input channel 63, the annular material reserved cavity 66 and the shaft body mounting hole 67, wherein the horizontal rotating shaft 71 is fixedly mounted with an eccentric block 72 on the shaft body located inside the screening drum 61, and the horizontal rotating shaft 71 is fixedly mounted with a fixing bracket 73 on the shaft body located near the opening end of the screening drum 61, and the outer circumferential surface of the fixing bracket 73 is fixedly mounted on the circumferential inner wall of the screening drum 61, and the horizontal rotating shaft 71 is fixedly mounted with a spiral conveying blade 74 on the shaft body located inside the screening drum 61, the material input channel 63 and the annular material reserved cavity 66, and the horizontal rotating shaft 71 is respectively mounted in the sleeve hole of a shaft body mounting sleeve 75 through bearings on the shaft body near its two ends, and the bottom of the shaft body mounting sleeve 75 is fixed A top support base 76 is fixedly installed, and a No. 2 bottom support base 78 is arranged directly below each of the top support bases 76. A coil spring 77 is fixedly installed between each of the top support bases 76 and the No. 2 bottom support bases 78. A No. 1 rotating disk 79 is fixedly installed at one end of the horizontal rotating shaft 71 located outside the gravity-type feeding shell 64. The No. 1 rotating disk 79 is provided with a No. 2 rotating disk 710 that moves with the rotor 4 in an area away from its end surface. Three annular array-type soft ropes 711 are fixedly installed between the No. 1 rotating disk 79 and the No. 2 rotating disk 710. After the No. 1 bottom support base 5 and the No. 2 bottom support base 78 are fixedly installed, the soft ropes 711 are in a relaxed state, and the center of the eccentric block 72 is arranged on the side away from the axis of the horizontal rotating shaft 71.

[0033] In order to adjust the working height of the drive motor 1, please refer to Figure 1 , Figure 2 , Figure 7 and Figure 8, it is necessary to set a support height adjustment mechanism 8, which is provided with a No. 1 external thread rod 86 and a No. 2 external thread rod 87 fixedly connected to the end surface of the No. 1 bottom support base 5 and the motor fixing base 2, a longitudinal threaded sleeve 81 threadedly connected to the No. 1 external thread rod 86 and the No. 2 external thread rod 87 and capable of changing the distance between the No. 1 external thread rod 86 and the No. 2 external thread rod 87 when rotating, and a multi-thread sleeve inserted at the axis of the No. 1 external thread rod 86 and the No. 2 external thread rod 87 and capable of preventing the No. 1 external thread rod 86 and the No. 2 external thread rod 87 from rotating relative to each other. The polygonal limiting rod 811 directionally rotates the longitudinal threaded sleeve 81. Since the spiral direction of the No. 1 threaded structure 84 is opposite to the spiral direction of the No. 2 threaded structure 85, and during the rotation process, the existence of the polygonal limiting rod 811 prevents the No. 1 externally threaded rod 86 and the No. 2 externally threaded rod 87 from rotating relative to each other. Therefore, the distance between the No. 1 externally threaded rod 86 and the No. 2 externally threaded rod 87 will change until the rotor 4 and the horizontal rotating shaft 71 are on the same horizontal line, thereby realizing the function of adjusting the working height of the drive motor 1.

[0034] For the specific structure of the support height adjustment mechanism 8, please refer to Figure 7 and Figure 8, including a longitudinal threaded sleeve 81, a No. 1 external threaded rod 86 and a No. 2 external threaded rod 87, one end of the longitudinal threaded sleeve 81 is provided with a No. 1 internal threaded cavity 82 with an inner concave structure, and the other end of the longitudinal threaded sleeve 81 is provided with a No. 2 internal threaded cavity 83 with an inner concave structure, the rod body of the No. 1 external threaded rod 86 is installed in the interior of the No. 1 internal threaded cavity 82 through the No. 1 threaded structure 84, and the rod body of the No. 2 external threaded rod 87 is installed in the interior of the No. 2 internal threaded cavity 83 through the No. 2 threaded structure 85, the No. 1 external threaded rod 86 and the No. 2 external threaded rod 87 are provided with a polygonal limiting cavity 810 with an inner concave structure at the opposite ends, a polygonal limiting rod 811 inserted into the polygonal limiting cavity 810 is fixedly installed in the center of the longitudinal threaded sleeve 81, and one end of the No. 1 external threaded rod 86 is provided with a structure integral with it and fixed to the upper end surface of the No. 1 bottom support base 5 The first connecting plate 88 is fixedly connected to the first external threaded rod 87, and one end of the second external threaded rod 87 is provided with a second connecting plate 89 which is an integral structure with it and fixedly connected to the bottom end of the motor fixed base 2. The structural shape of the cross section of the polygonal limiting cavity 810 is consistent with the structural shape of the cross section of the polygonal limiting rod 811, both of which are polygonal structures, and the structural dimensions of the cross section of the polygonal limiting cavity 810 match the structural dimensions of the cross section of the polygonal limiting rod 811. The first threaded structure 84 includes an internal threaded structure arranged inside the first internal threaded cavity 82 and an external threaded structure arranged on the rod body of the first external threaded rod 86. The second threaded structure 85 includes an internal threaded structure arranged inside the second internal threaded cavity 83 and an external threaded structure arranged on the rod body of the second external threaded rod 87, and the spiral direction of the first threaded structure 84 is opposite to the spiral direction of the second threaded structure 85.

[0035] When in use, the first bottom support base 5 and the second bottom support base 78 are fixedly installed in the workplace, and the longitudinal threaded sleeve 81 is rotated in a directional manner, and the distance between the first external threaded rod 86 and the second external threaded rod 87 will change until the rotor 4 and the horizontal rotation axis 71 are on the same horizontal line;

[0036] The ammonium chloride particles are put into the conical feeding chamber 65. Under the action of gravity, the material particles will accumulate in the annular material reserved chamber 66. Then the driving motor 1 is started, and the rotation direction of the rotor 4 is controlled. The rotor 4 first drives the No. 2 rotating disk 710 to rotate. At this time, the three soft ropes 711 will be entangled with each other until the three soft ropes 711 drive the No. 1 rotating disk 79 to rotate, realizing soft start. The rotation of the No. 1 rotating disk 79 will drive the spiral conveying blades 74, the eccentric block 72 and the screening drum 61 to rotate. At this time, the rotation of the eccentric block 72 will cause the screening drum 61 and the horizontal rotating shaft 71 to deviate from the force, thereby causing the screening drum 61 and the horizontal rotating shaft 71 to shake. The shaking will cause the material inside the screening drum 61 to move quickly, thereby accelerating the screening of the material.

[0037] First, it is necessary to make the rotor 4 drive the spiral conveying blade 74 to drive the surrounding ammonium chloride particle material toward the inside of the screening drum 61. Since the spiral direction of the spiral conveying blade 74 is opposite to the spiral direction of the spiral bar 68, when the material enters the inside of the screening drum 61, under the action of the spiral bar 68, the material will continue to circulate toward the solid end of the screening drum 61, and the powdered ammonium chloride particles will fall downward through the screening holes 62, while the block ammonium chloride particles will be stored in the screening drum 61. After a single screening is completed, the drive motor 1 is controlled to reverse the rotor 4. At this time, the reversal of the spiral bar 68 will cause the block ammonium chloride particles located around it to be discharged outward through the open end of the screening drum 61, thereby achieving the screening effect of the ammonium chloride particles.

[0038] 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. An ammonium chloride granular material screening device, comprising a motor fixing base (2) with a motor mounting cavity (3) at the center, a driving motor (1) fixedly mounted in the motor mounting cavity (3), and a bottom supporting base (5) for supporting the driving motor (1), characterized in that: Also includes, A rotary material screening mechanism (6) is provided with a screening drum (61) which is hollow inside and can screen material particles, a spiral strip (68) fixedly mounted on the inner wall of the screening drum (61) and can make the material particles move in a directional manner when rotating, and a gravity feeding housing (64) mounted on one end of the screening drum (61) via a bearing and used to feed materials; and a soft-start linkage mechanism (7), wherein a horizontal rotating shaft (71) is arranged inside the mechanism and is capable of rotating along with the rotor (4) of the driving motor (1) and driving the screening drum (61) to rotate, an eccentric block (72) capable of rotating along with the horizontal rotating shaft (71) and generating a shaking phenomenon, a soft rope (711) for enabling the horizontal rotating shaft (71) to achieve a soft start along with the rotor (4), and a spiral spring (77) for achieving an elastic supporting effect on the horizontal rotating shaft (71).

2. The ammonium chloride granular material screening device according to claim 1, characterized in that: The rotary material screening mechanism (6) comprises a screening drum (61) and a gravity feeding shell (64); a plurality of screening holes (62) for separating materials are arranged at the circumferential wall thickness of the screening drum (61); three spiral strips (68) in an annular array are fixed at the circumferential inner wall of the screening drum (61); a material input channel (63) which is integrally structured with the screening drum (61) and communicates with the inner cavity of the screening drum (61) is arranged at the solid end of the screening drum (61); an annular material pre-reserved cavity (66) which is mounted on the periphery of the opening end of the material input channel (63) via a bearing is arranged inside the gravity feeding shell (64); a conical feeding cavity (65) whose top end is in an open state and whose bottom end communicates with the annular material pre-reserved cavity (66) is arranged inside the gravity feeding shell (64); and a shaft mounting hole (67) which communicates with the external space and the annular material pre-reserved cavity (66) is arranged at one end of the gravity feeding shell (64).

3. The ammonium chloride granular material screening device according to claim 2, characterized in that: The center of gravity of the gravity-type feeding housing (64) is sufficient to maintain a vertical state with the opening end of the conical feeding chamber (65) facing upward during operation.

4. The ammonium chloride granular material screening device according to claim 3, characterized in that: The soft-start linkage mechanism (7) comprises a horizontal rotating shaft (71) which passes through the inner cavity of the screening drum (61), the material input channel (63), the annular material reserved cavity (66) and the shaft body mounting hole (67) in sequence; the horizontal rotating shaft (71) is fixedly mounted with an eccentric block (72) on the shaft body located inside the screening drum (61); the horizontal rotating shaft (71) is fixedly mounted with a fixing bracket (73) on the shaft body located near the opening end of the screening drum (61); the outer circumferential surface of the fixing bracket (73) is fixedly mounted on the circumferential inner wall of the screening drum (61); the horizontal rotating shaft (71) is fixedly mounted with a spiral conveying blade (74) on the shaft body located inside the screening drum (61), the material input channel (63) and the annular material reserved cavity (66); the horizontal rotating shaft (71) is respectively mounted on a shaft body mounting sleeve through bearings on the shaft body near its two ends. In the sleeve hole of (75), a top support base (76) is fixedly installed at the bottom of the shaft mounting sleeve (75), and a No. 2 bottom support base (78) is arranged directly below each of the top support bases (76). A coil spring (77) is fixedly installed between each of the top support bases (76) and the No. 2 bottom support bases (78). A No. 1 rotating disk (79) is fixedly installed at one end of the horizontal rotating shaft (71) located outside the gravity-type feeding shell (64). The No. 1 rotating disk (79) is provided with a No. 2 rotating disk (710) that moves with the rotor (4) in an area away from its end surface. Three annular array-type soft ropes (711) are fixedly installed between the No. 1 rotating disk (79) and the No. 2 rotating disk (710), and after the No. 1 bottom support base (5) and the No. 2 bottom support base (78) are fixedly installed, the soft ropes (711) are in a relaxed state.

5. The ammonium chloride granular material screening device according to claim 4, characterized in that: The center of the eccentric block (72) is arranged on a side deviating from the axis of the horizontal rotation axis (71).

6. The ammonium chloride granular material screening device according to claim 5, characterized in that: The spiral direction of the spiral conveying blade (74) is opposite to the spiral direction of the spiral strip (68).

7. An ammonium chloride granular material screening device according to any one of claims 1 to 6, characterized in that: The invention also comprises a support height adjustment mechanism (8), the interior of which is provided with a first externally threaded rod (86) and a second externally threaded rod (87) fixedly connected to the end surface of the first bottom support base (5) and the motor fixing base (2), a longitudinal threaded sleeve (81) threadedly connected to the first externally threaded rod (86) and the second externally threaded rod (87) and capable of changing the distance between the first externally threaded rod (86) and the second externally threaded rod (87) when rotating, and a polygonal limiting rod (811) inserted into the axis of the first externally threaded rod (86) and the second externally threaded rod (87) and capable of preventing the first externally threaded rod (86) and the second externally threaded rod (87) from rotating relative to each other.

8. The ammonium chloride granular material screening device according to claim 7, characterized in that: The support height adjustment mechanism (8) comprises a longitudinal threaded sleeve (81), a No. 1 external threaded rod (86) and a No. 2 external threaded rod (87); one end of the longitudinal threaded sleeve (81) is provided with a No. 1 internal threaded cavity (82) with an inner concave structure; the other end of the longitudinal threaded sleeve (81) is provided with a No. 2 internal threaded cavity (83) with an inner concave structure; the rod body of the No. 1 external threaded rod (86) is installed inside the No. 1 internal threaded cavity (82) via a No. 1 threaded structure (84); the rod body of the No. 2 external threaded rod (87) is installed inside the No. 2 internal threaded cavity (83) via a No. 2 threaded structure (85). The first external threaded rod (86) and the second external threaded rod (87) are provided with a polygonal limiting cavity (810) with an inwardly concave structure at the opposite ends, a polygonal limiting rod (811) inserted into the polygonal limiting cavity (810) is fixedly installed at the center of the longitudinal threaded sleeve (81), one end of the first external threaded rod (86) is provided with a first connecting plate (88) which is an integral structure with it and fixedly connected to the upper end surface of the first bottom support base (5), and one end of the second external threaded rod (87) is provided with a second connecting plate (89) which is an integral structure with it and fixedly connected to the bottom end of the motor fixing base (2).

9. The ammonium chloride granular material screening device according to claim 8, characterized in that: The structural shape of the cross section of the polygonal limiting cavity (810) is consistent with the structural shape of the cross section of the polygonal limiting rod (811), both of which are polygonal structures, and the structural dimensions of the cross section of the polygonal limiting cavity (810) match the structural dimensions of the cross section of the polygonal limiting rod (811).

10. The ammonium chloride granular material screening device according to claim 9, characterized in that: The No. 1 thread structure (84) includes an internal thread structure arranged inside the No. 1 internal thread cavity (82) and an external thread structure arranged on the rod body of the No. 1 external thread rod (86); the No. 2 thread structure (85) includes an internal thread structure arranged inside the No. 2 internal thread cavity (83) and an external thread structure arranged on the rod body of the No. 2 external thread rod (87); and the spiral direction of the No. 1 thread structure (84) is opposite to the spiral direction of the No. 2 thread structure (85).

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