Screening device for compound fertilizer processing

Abstract

The utility model relates to the technical field of fertilizer processing and screening, and discloses a screening device for compound fertilizer processing, which comprises a rack, a screen is obliquely arranged in the rack along the outlet direction, the screen is provided with an upper layer and a lower layer at intervals, and the screen holes of the lower layer of screen are smaller than the screen holes of the upper layer of screen; a plurality of knocking parts are movably arranged between the upper-layer screen and the lower-layer screen, in an initial state, the bottom end of each knocking part is in contact with the top end of the lower-layer screen, and the knocking parts move up and down to impact the upper-layer screen and the lower-layer screen along with vibration screening during working; according to the screening device, the screening surface can be knocked in the screening process, the probability that screening holes are blocked is reduced, and it is guaranteed that screening work is conducted smoothly.

Description

Technical Field

[0001] The utility model relates to the technical field of fertilizer processing and screening, in particular to a screening device for compound fertilizer processing. Background Art

[0002] Compound fertilizers are widely used by growers because they contain a variety of nutrients, few by-products, and have a good physical shape. In order to meet sowing needs, match sowing equipment for use, and ensure uniform volatilization of fertilizer efficiency, the particle size of fertilizers is usually limited to 3-6mm according to relevant standards; this requires screening of the produced fertilizers; when screening compound fertilizers, the existing linear screens used for screening materials often have fertilizer particles stuck in the sieve holes and difficult to remove due to the special properties of the fertilizers. Failure to clean them in time will cause large-scale clogging of the screen, which will have a negative impact on both screening efficiency and screening effect. Therefore, there is an urgent need for a screening device for compound fertilizer processing that can reduce the probability of screen clogging and ensure smooth screening. Utility Model Content

[0003] The utility model aims to provide a screening device for compound fertilizer processing, which can knock the screening surface during the screening process, reduce the probability of the screen holes being blocked, and ensure the smooth progress of the screening work.

[0004] The utility model adopts the following technical solutions:

[0005] A screening device for processing compound fertilizers comprises a frame, wherein a screen is arranged obliquely in the outlet direction in the frame, wherein the screen is arranged in two layers, and the sieve holes of the lower layer are smaller than the sieve holes of the upper layer; a plurality of knocking parts are movably arranged between the upper and lower layers of the screen, and in an initial state, the bottom end of each knocking part contacts the top end of the lower layer of the screen, and during operation, as the vibration screening proceeds, the knocking parts move up and down to hit the upper and lower layers of the screen.

[0006] Preferably, the knocking part includes a connecting rod in the middle, and knocking balls are provided at the upper and lower ends of the connecting rod.

[0007] Preferably, the knocking ball is made of rubber.

[0008] Preferably, a limit plate is provided on the top of the upper screen, and the limit plate is connected to a limit frame provided at the lower part of the screen; the connecting rod is movably provided in the limit frame.

[0009] Preferably, a support rod is provided at the bottom of the limiting frame, and the connecting rod is movably provided on the support rod.

[0010] Preferably, the support rods are arranged in an undulating wave shape along the length direction of the limiting frame.

[0011] Preferably, the support rod is an angle steel structure with its ridges facing upwards.

[0012] Preferably, a sealing cover is provided on the top of the frame, a discharge hopper is provided at one end of the sealing cover, and a discharge port communicated with the discharge hopper is opened on the sealing cover.

[0013] Preferably, the size of the discharge port increases from top to bottom.

[0014] Preferably, the discharge port is symmetrical and has two guide plates spaced apart.

[0015] Compared with the prior art, the beneficial effect of the utility model is that: the utility model sets a knocking part between the upper and lower screens, which can drive the knocking part to move up and down under the vibration of the vibration motor as the screening work progresses, and knock the bottom of the upper screen and the top of the lower screen respectively, avoiding the fertilizer from being stuck in the screen hole and difficult to escape, and clogging the screen, thereby ensuring the smooth progress of the screening work, with a simple structure, easy use and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of an embodiment of the present application;

[0017] Figure 2 This is a schematic diagram of the structure of the screen according to the embodiment of the present application;

[0018] Figure 3 A top view of the limiting frame of an embodiment of the present application;

[0019] Figure 4 It is a structural diagram of the striking part of an embodiment of the present application;

[0020] Figure 5 This is a cross-sectional view of the sealing cover according to an embodiment of the present application. DETAILED DESCRIPTION

[0021] The following is a clear and complete description of the present invention with reference to the accompanying drawings and embodiments:

[0022] like Figures 1 to 5As shown, the screening device for compound fertilizer processing described in the present invention includes a frame 1, a vibration motor is provided on the frame 1, two staggered outlets 2 are provided at one end of the frame 1, and an outlet 2 is provided at the bottom of the frame 1 for discharge of screened materials; a screen 3 is provided in the frame 1 along the direction of one side outlet 2, and the screen 3 is inclined downward from the side away from the outlet 2 to the side close to the outlet 2 to screen out the discharge of the material; since it is necessary to retain compound fertilizers with a particle size of 3-6 mm, the screen 3 is arranged with an upper and lower layers at intervals, and the sieve holes of the lower screen 3 are less than 3 mm, and the sieve holes of the upper screen 3 are greater than 6 mm; a plurality of knocking parts are movably provided between the upper and lower layers of the screen 3, and in the initial state, the bottom end of each knocking part contacts the top end of the lower screen 3, and during operation, as the vibration screening proceeds, the knocking part moves up and down and hits the upper and lower layers of the screen 3, so that the fertilizer blocked in the sieve holes is knocked and vibrated off, avoiding the occurrence of large-scale clogging of the screen 3 and ensuring the smooth progress of the screening work.

[0023] Furthermore, in this embodiment, the knocking portion includes a connecting rod 4 in the middle, with knocking balls 5 provided at the upper and lower ends of the connecting rod 4. During operation, the connecting rod 4 moves up and down, driving the upper and lower knocking balls 5 to knock the screen 3 at the corresponding ends, effectively reducing the probability of the screen 3 being blocked and achieving rapid screening of fertilizer. The knocking balls 5 are made of rubber material, so that the elasticity of the rubber can ensure the knocking effect on the screen 3 while reducing damage to the screen 3.

[0024] Furthermore, a limit plate 6 is provided on the top of the upper screen 3, and the limit plate 6 is connected to a limit frame 7 provided at the bottom of the screen 3, and the limit frame 7 is fixed in the frame 1. The setting of the limit plate 6 can reduce the degree of fluctuation of the screen 3 during operation, ensuring smooth screening operation, and the lower screen 3 can be restricted to a certain extent by the knocking ball 5; the connecting rod 4 is movably provided in the limit frame 7. Specifically, a support rod 8 is provided at the bottom of the limit frame 7, and the connecting rod 4 is movably provided on the support rod 8. The support rod 8 is provided at the bottom of the limit frame 7, and can provide a certain amount of movable space between the upper knocking ball 5 and the upper screen 3, ensuring the up and down movement of the knocking ball 5.

[0025] Preferably, the support rods 8 are arranged in an undulating wave shape along the length of the limiting frame 7. The wavy line arrangement can evenly arrange the multiple knocking parts while not occupying too much area inside the limiting frame 7, thereby preventing the fertilizer screened from the upper layer from being blocked during its fall. The support rods 8 are preferably configured as an angle steel structure with the ridges facing upward to prevent the falling fertilizer from accumulating on the top of the support rods 8.

[0026] Furthermore, a sealing cover 9 is provided on the top of the frame 1 for sealing the top of the screening machine to prevent dust from escaping into the surrounding environment during the screening process. A discharge hopper 10 is provided at one end of the sealing cover 9, and a discharge port 11 is provided on the sealing cover to communicate with the discharge hopper 10. The size of the discharge port 11 increases from top to bottom to facilitate the discharge operation. In addition, the discharge port 11 is symmetrical and two guide plates 12 are provided at intervals. The guide plates 12 are tilted in opposite directions. At this time, a discharge channel is formed between the guide plate 12 and the discharge port 11, as well as between the two guide plates 12. This can improve the uniformity of the fertilizer when it falls to the initial end of the screen 3, achieve uniform screening of the fertilizer, and prevent the fertilizer from falling onto the screen 3 and affecting the screening effect.

[0027] When the utility model is working, the fertilizer to be screened is added to the screen 3 in the frame 1 through the lower hopper 10. Under the guiding effect of the guide plate 12, the uniformity of the fertilizer when it falls to the initial end of the screen 3 can be improved, thereby improving the screening effect; during the screening process, the two knocking balls 5 will move up and down to knock the upper and lower layers of the screen 3, thereby reducing the probability of the screen holes being blocked and ensuring the smooth progress of the screening work.

Claims

1. A screening device for compound fertilizer processing, comprising a frame, wherein a screen is arranged obliquely in the outlet direction, characterized in that: The screen is arranged in two layers, and the sieve holes of the lower layer are smaller than the sieve holes of the upper layer; a plurality of knocking parts are movably arranged between the upper and lower layers of the screen, and in the initial state, the bottom end of each knocking part contacts the top end of the lower layer of the screen, and during operation, as the vibration screening proceeds, the knocking part moves up and down to hit the upper and lower layers of the screen.

2. The screening device for compound fertilizer processing according to claim 1, characterized in that: The knocking part comprises a connecting rod in the middle, and knocking balls are arranged at the upper and lower ends of the connecting rod.

3. The screening device for compound fertilizer processing according to claim 2, characterized in that: The knocking ball is made of rubber material.

4. The screening device for compound fertilizer processing according to claim 2, characterized in that: A limit plate is provided on the top of the upper screen, and the limit plate is connected to a limit frame provided at the lower part of the screen; the connecting rod is movably provided in the limit frame.

5. The screening device for compound fertilizer processing according to claim 4, characterized in that: A support rod is provided at the bottom of the limiting frame, and the connecting rod is movably provided on the support rod.

6. The screening device for compound fertilizer processing according to claim 5, characterized in that: The support rods are arranged in an undulating wave shape along the length direction of the limiting frame.

7. The screening device for compound fertilizer processing according to claim 6, characterized in that: The support rod is an angle steel structure with an upward ridgeline.

8. The screening device for compound fertilizer processing according to claim 1, characterized in that: A sealing cover is provided on the top of the frame, a lower hopper is provided at one end of the sealing cover, and a lowering port communicated with the lowering hopper is opened on the sealing cover.

9. The screening device for compound fertilizer processing according to claim 8, characterized in that: The size of the feeding opening increases from top to bottom.

10. The screening device for compound fertilizer processing according to claim 9, characterized in that: The discharge port is symmetrical and has two guide plates spaced apart.

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